(1) Since the abrasive grinding wheel itself has a high hardness and heat resistance, it is possible to process high hardness materials such as hardened steel, carbide, etc.. (2) determine the characteristics of the grinding wheel grinding process system can make abrasive grinding wheels even micro cutting, the general ap = 0.001 ~ 0.005mm; grinding speed is high, generally up to v = 30 ~ 50m / s; grinder stiffness; adopts hydraulic transmission Therefore grinding energy and affordable access to high precision (it6 ~ it5) small surface roughness (ra = 0.8 ~ 0.2μm). Grinding parts finishing the main methods.
(3) As intense friction, leaving the grinding zone temperature is high. This can cause deformation of the workpiece to Diamond tools produce stress, and even cause surface burns. Therefore, a lot of grinding coolant must be injected to reduce the grinding temperature. Coolant may also function as a lubricant chip.
(4) grinding large radial force. This will cause the machine - grinding wheel - workpiece system flexibility retreat, so that the actual depth of cut less than the nominal depth of cut. Therefore, the grinding will be completed when the light is not to be infeed grinding to remove the error.
(5) self-sharpening: abrasive grinding blunt, grinding force also increases, resulting in grain crushing or off and re-exposing the sharp edge features. Self-sharpening of metal grinding wheel the grinding head to work in a certain time, after a certain time required for examination, manual trimming, to prevent the grinding force increases and cause vibration, noise and damage the workpiece surface.
Abrasive Tools
2013年10月31日星期四
Inner circle grinding mechanical transmission
Inner circle grinding is generally divided into four types: wind-driven inner circle grinding, high-speed electric aerostatic bearing inner circle grinding, mechanical drive and electric grinding inner circle inner circle grinding.Wind-driven inner circle grinding: spindle with concrete saw blades a turbine driven by compressed air turbine rotates the spindle speed, spindle speed reaches 10000R/MIN. Moreover, small vibration, pressure can be adjusted stepless. And with regulators, filters and other accessories.Aerostatic bearing speed electric grinding inner circle: The aerostatic bearing (supply pressure is 40 ~ 65MPa), grinding system rigidity, both electric grinding characteristics, speed up 180000R/MIN, suitable for grinding a ~ 10MM hole.Inner circle grinding mechanical transmission: mainly by the spindle, bearings, sleeve body shell, flat supporting pulleys and other components. Then, after replacement of the long axis, is used to grind different bore diameter and granite polishing pads length, for comparison, the use of low speed, the speed is generally lower than 2000R/MIN.Electric grinding inner circle: A three-phase asynchronous motor direct drive, and another by a high-frequency electric motor driven spindle speed of up to 50000 ~ 90000R/MIN. Output power is larger, instantaneous overload, speed characteristics hard, little vibration.enerally the heat generated by the grinding process will burn the workpiece, so you need to use coolant to promptly take the heat, this is called wet. However, grinding tools is a special application, as part of more complex shape, machining accuracy is relatively high, most of the processes set by manually, there is no way to use wet methods. In theory, the hardness of steel molds are high, and SG monocrystalline corundum grinding wheel is the best option.
2013年10月30日星期三
the use of resin-bonded grinding wheel
Stainless steel toughness, high temperature strength, grinding force, thus requiring wheel has high strength, can withstand greater impact loads. The grinding wheel stainless steel with a ceramic multi-binding agent. Vitrified heat resistance, good corrosion carbide tipped saw blade resistance, not afraid of wet, porous, not only to maintain the grinding wheel abrasive cutting, can obtain higher productivity, and can withstand greater impact loads. For cutting, grooving wheel large diameter thin, also can produce the resin binding agent, for grinding stainless steel parts. It is flexible, not afraid to shock, but the resin bond afraid alkaline solution, bear high temperature, when the temperature is higher than 150 ℃ will soften and lose strength. Thus grinding must be fully cooled. However, acid-resistant stainless steel and other materials in the grinding of the hole, the use of resin-bonded grinding wheel, grinding holes can improve the surface quality and avoiding burns.Hardness
Stainless steel grinding wheel hardness should be higher than normal carbon steel grinding a little softer, so concrete diamond blades that the wheel has a good self-sharpening. Wheel strength is too high, not falling blunt abrasive, grinding wheel clogged evil, will cause the grinding force, grinding heat increases and the workpiece surface burns. This is for grinding stainless steel with particular attention to prevent. In addition, abrasive grinding wheel hardness also affects the degree of adhesion and stainless steel materials. Table 02 shows that the higher the hardness of grinding wheel, grinding wheel adhesion more severe. Of course, wheel hardness is too low, or excessive wear
Stainless steel grinding wheel hardness should be higher than normal carbon steel grinding a little softer, so concrete diamond blades that the wheel has a good self-sharpening. Wheel strength is too high, not falling blunt abrasive, grinding wheel clogged evil, will cause the grinding force, grinding heat increases and the workpiece surface burns. This is for grinding stainless steel with particular attention to prevent. In addition, abrasive grinding wheel hardness also affects the degree of adhesion and stainless steel materials. Table 02 shows that the higher the hardness of grinding wheel, grinding wheel adhesion more severe. Of course, wheel hardness is too low, or excessive wear
three lines cut into the feed grinding wheel
This method machine adjustment and wheel dressing more convenient, radial cutting force is small, the workpiece thermal conditions are good, high precision machining, grinding acme screw up to three (JB/T2886-1992) highest accuracy, the surface roughness 0.2 to 0.4 microns. You can screw up a different angle grinding, teeth opened a different, a different aspect ratio of the workpiece, suitable for processing a variety PCD grinding wheel of precision thread and ball screw, but the production is less efficient than multi-line grinding wheel, commonly used in single-piece, small-batch production.Over 2 wire feed grinding wheel vertical As a multi-line grinding of the cutting comb teeth also participate can be completed in a single pass of the workpiece grinding, high production efficiency, but is difficult molding wheel dressing, the large pitch, a large helix angle of the thread and the teeth shaped high precision thread should not be used, suitable for carbide grinding wheels mass production of grinding teeth is simple, lower-precision thread.
More than three lines cut into the feed grinding wheel
This method is suitable for grinding small pitch, small thread lead angle, low precision and stubby threaded parts, and on the threaded grinding wheel spindle and the workpiece clamping tile cutting blades rigidity demanding.Width of grinding wheel grinding force, grinding power, first of all wheel drive motor power have a reasonable margin. In addition, the main components of the machine should have high accuracy and sufficient rigidity. If higher precision grinding wheel spindle, spindle elongation cantilever should be as short as possible
More than three lines cut into the feed grinding wheel
This method is suitable for grinding small pitch, small thread lead angle, low precision and stubby threaded parts, and on the threaded grinding wheel spindle and the workpiece clamping tile cutting blades rigidity demanding.Width of grinding wheel grinding force, grinding power, first of all wheel drive motor power have a reasonable margin. In addition, the main components of the machine should have high accuracy and sufficient rigidity. If higher precision grinding wheel spindle, spindle elongation cantilever should be as short as possible
2013年10月29日星期二
In cutting wheel when it has the following characteristics
Wheel of traditional processing methods What are the limitations?
Wheel after roasting and curing processes, its size, shape and appearance of each respective position accuracy, can not reach the use of the technical requirements necessary after turning, research rubbing and grinding. The unit also due to the use of wheel and wheel consumption need not meet the requirements of the specification and application, it must be turning. As objective technical reasons, mostly outside the Diamond tools traditional international knife bowl for turning. In the process of working with it, the wheel at high speed (300 ~ 400m/min) No. 45 driven by hardened tool steel thin-walled bowl rotation, and stops moving knife, remove the wheel excess amount. Since the processing bowl and the cutter wheel rotates at high speed in the formation of dust and noise processing large cutting depth and feed rate is very small, so the processing efficiency is low and synthesis of the high resolution, the operator break strength. Large particles such as the use of diamond tools, expensive, and because of the low bending strength of 4 inch saw blades the diamond cutting easily damaged, it is formed when the cutting wheel cutting depth and feed rate is very small, the general only used for finishing.
(2) using the tool cutting wheel PDC What are the characteristics?
Polycrystalline Diamond Compact (PDC), was developed in the 1970s into a superhard cutting tool information. It is made with the tool being used to cut a variety of non-ferrous metals and non-metals, and can be used to cut wheel. In cutting wheel when it has the following characteristics:
(A) has a high hardness and wear resistance: the hardness of polycrystalline diamond layer common in HV7000 ~ 9000, and the differences in each direction, is a common abrasive wheel hardness 2 to 4 times. Cutting wheel with it a high degree of durability, the volume wear ratio wet saw blades up to 1/13 million. Quality wear ratio up to 1/300 000, thereby reducing the consumption of capital.
Wheel after roasting and curing processes, its size, shape and appearance of each respective position accuracy, can not reach the use of the technical requirements necessary after turning, research rubbing and grinding. The unit also due to the use of wheel and wheel consumption need not meet the requirements of the specification and application, it must be turning. As objective technical reasons, mostly outside the Diamond tools traditional international knife bowl for turning. In the process of working with it, the wheel at high speed (300 ~ 400m/min) No. 45 driven by hardened tool steel thin-walled bowl rotation, and stops moving knife, remove the wheel excess amount. Since the processing bowl and the cutter wheel rotates at high speed in the formation of dust and noise processing large cutting depth and feed rate is very small, so the processing efficiency is low and synthesis of the high resolution, the operator break strength. Large particles such as the use of diamond tools, expensive, and because of the low bending strength of 4 inch saw blades the diamond cutting easily damaged, it is formed when the cutting wheel cutting depth and feed rate is very small, the general only used for finishing.
(2) using the tool cutting wheel PDC What are the characteristics?
Polycrystalline Diamond Compact (PDC), was developed in the 1970s into a superhard cutting tool information. It is made with the tool being used to cut a variety of non-ferrous metals and non-metals, and can be used to cut wheel. In cutting wheel when it has the following characteristics:
(A) has a high hardness and wear resistance: the hardness of polycrystalline diamond layer common in HV7000 ~ 9000, and the differences in each direction, is a common abrasive wheel hardness 2 to 4 times. Cutting wheel with it a high degree of durability, the volume wear ratio wet saw blades up to 1/13 million. Quality wear ratio up to 1/300 000, thereby reducing the consumption of capital.
monocrystalline diamond tool application
the crystal structure of the highest density of metal atom such as axial face-centered cubic crystal. Diamond crystal connected between the carbon atoms bond to sp3 hybridized covalent bond, with a strong binding force, stability and direction. The unique crystal structure of diamond in nature it has the highest hardness, stiffness, refractive index and thermal conductivity, and high wear resistance, corrosion resistance and core drill bits chemical stability.
Excellent characteristics of single crystal diamond meet the precision and ultra-precision cutting tool material for most of the requirements and is ideal for precision cutting tool materials. Diamond without internal grain boundaries uniform crystal structure so that the tool cutting edge can theoretically reach the atomic level flatness and core bits for concrete sharpness, cut thin cutting ability, high precision, cutting force is small; their high hardness and good wear resistance resistance, corrosion resistance and chemical stability can ensure that the tool has a long life, so that it can continue for a long time of cutting, the tool wear can be reduced because of the precision of the parts; its high thermal conductivity can cbn grinding wheels be reduced and the cutting temperature parts thermal deformation.
Single crystal diamond tool in the machining field has an important position, is widely used as a mirror, missiles and rockets navigation gyro, computer hard disk substrate accelerator electron gun, such as ultra precision mirror of parts. Can also be used in the manufacture of single crystal diamond eye, brain surgeon's scalpel, thin slicing knives and other bio-medical tools.
Excellent characteristics of single crystal diamond meet the precision and ultra-precision cutting tool material for most of the requirements and is ideal for precision cutting tool materials. Diamond without internal grain boundaries uniform crystal structure so that the tool cutting edge can theoretically reach the atomic level flatness and core bits for concrete sharpness, cut thin cutting ability, high precision, cutting force is small; their high hardness and good wear resistance resistance, corrosion resistance and chemical stability can ensure that the tool has a long life, so that it can continue for a long time of cutting, the tool wear can be reduced because of the precision of the parts; its high thermal conductivity can cbn grinding wheels be reduced and the cutting temperature parts thermal deformation.
Single crystal diamond tool in the machining field has an important position, is widely used as a mirror, missiles and rockets navigation gyro, computer hard disk substrate accelerator electron gun, such as ultra precision mirror of parts. Can also be used in the manufacture of single crystal diamond eye, brain surgeon's scalpel, thin slicing knives and other bio-medical tools.
2013年10月28日星期一
diamond grinding wheel grinding necessary to have the appropriate conditions
In order to achieve optimal grinding, diamond grinding wheel grinding necessary to have the appropriate conditions, which apply to both, the layout view is a microscopic plastic, from the microscopic point of view is the diamond wheel layout depicting largely microscopic Layout resolution of the diamond wheel grinding action.
1 This means cutting forces and temperatures largely determined by microscopic layout resolutions, based on these reasons, it should be possible to Dresser good, in the grinding process, because diamond wire saw not only lead to the inevitable tool wear on the grinding wheel at the micro layout changes, and at the micro layout has also changed.
(2) In order to guarantee the workpiece and the grinding process Gongyi accuracy, diamond grinding wheel and eliminate the need for trimming. Includes shaping and trimming dressing, plastic dash is a wheel dimensions and concentricity optimization, while sharpening the cutting wheel is progressive order, add abrasive projection height. In the process of the elimination of residual chips from the pores of eradication, so 4 inch saw blades that the pore space of the chip and can no longer be fully utilized.
3 trimming stuff is divided into fixed and rotary dresser dresser, dresser into a single fixed point and multi-point trim trimming, single point diamond dresser top as long as the stuff single diamond rotary dresser with superiority It can also be used for profiling molding trim trimmed trimmed about molding, diamond grinding wheels and CBN grinding wheels are molded into something negative generalization, and generalization are cutting blades copied directly to the front wheel, the feed is in the radial direction on.
Profiling trimmed with standard type face, the feed system is a system in multiple directions by the CNC control together, the results from the trimming trimming stuff and coolant concluded together also suffered the impact of other parameters such as touch ratio Ud, dressing feed Rate qd and dressing feed aed, parameters of diamond and cubic boron nitride grinding wheel cutting wheel features have a crucial impact.
1 This means cutting forces and temperatures largely determined by microscopic layout resolutions, based on these reasons, it should be possible to Dresser good, in the grinding process, because diamond wire saw not only lead to the inevitable tool wear on the grinding wheel at the micro layout changes, and at the micro layout has also changed.
(2) In order to guarantee the workpiece and the grinding process Gongyi accuracy, diamond grinding wheel and eliminate the need for trimming. Includes shaping and trimming dressing, plastic dash is a wheel dimensions and concentricity optimization, while sharpening the cutting wheel is progressive order, add abrasive projection height. In the process of the elimination of residual chips from the pores of eradication, so 4 inch saw blades that the pore space of the chip and can no longer be fully utilized.
3 trimming stuff is divided into fixed and rotary dresser dresser, dresser into a single fixed point and multi-point trim trimming, single point diamond dresser top as long as the stuff single diamond rotary dresser with superiority It can also be used for profiling molding trim trimmed trimmed about molding, diamond grinding wheels and CBN grinding wheels are molded into something negative generalization, and generalization are cutting blades copied directly to the front wheel, the feed is in the radial direction on.
Profiling trimmed with standard type face, the feed system is a system in multiple directions by the CNC control together, the results from the trimming trimming stuff and coolant concluded together also suffered the impact of other parameters such as touch ratio Ud, dressing feed Rate qd and dressing feed aed, parameters of diamond and cubic boron nitride grinding wheel cutting wheel features have a crucial impact.
diamond truing tool used for attention
1 using the new dresser, before finishing the last feeding should exit. Many crisp diamond dressing tools, at the beginning of his contacts with the wheel, are easily damaged.
(2) in an inclined angle of 10 ~ 15 ° diamond dressing tool head mounted to point to the direction of rotation of the wheel.
3 securely installed or clamping dresser dressing tool, not the tool head hanging too long.
4 Where possible, try to use carbide tipped saw blade coolant. Throughout the finishing time, with coolant pouring dressing tool and the wheel contact point.
5 In the dressing beginning from the highest point of repair from the grinding wheel, usually the middle wheel.
6 Note that except for a slight amount of repair. In addition to the maximum depth of repair, except for tinkering: 0.001 to 0.002 inches. Except for finishing: 0.0005 to 0.001 inches.
7 Press the relevant manuals choose the right lateral quickness. The slower moving laterally (in the allowable range), the lower surface roughness obtained wheel.
8 must be within the specified time interval for dressing the grinding wheel to prevent the wheel blunt, the grinding force increases.
9 at predetermined intervals, the toolholder the dressing tool rotating 1/8 turn, to ensure that the dressing tool is always sharp.
10 When the diamond dresser or tool head blunt or obvious change in peacetime, should be timely adjusted and replaced.
11 According to the diameter of metal grinding wheel the wheel, the amount of a reasonable choice of diamond CARAT (pure diamond content), the larger wheel diameter, the larger the value of the selected CARAT diamond.
Incorrect:
1 diamond dressing tools in place to clamp head, be careful not to bump into the wheel surface.
2 can not be a single point diamond dressing tool head vertically aligned wheel center to be inclined generally 10 ~ 15 °.
3 heat dressing tools can not be "quenched" (refers to sudden cold). In the dry dressing must be kept trimmed twice the interval sufficient to heat the dressing tool cooling.
4 wheel surface can not be assumed to concrete cutting have ideal flat. When trimming the beginning to find the highest point of the wheel position for trimming.
5, if possible, in addition to the amount of each wheel of the repair, the radius of the wheel can not be more than 0.001 inches. In addition to the amount of the repair is too large diamond dressing tool head can cause premature wear and often broken.
(2) in an inclined angle of 10 ~ 15 ° diamond dressing tool head mounted to point to the direction of rotation of the wheel.
3 securely installed or clamping dresser dressing tool, not the tool head hanging too long.
4 Where possible, try to use carbide tipped saw blade coolant. Throughout the finishing time, with coolant pouring dressing tool and the wheel contact point.
5 In the dressing beginning from the highest point of repair from the grinding wheel, usually the middle wheel.
6 Note that except for a slight amount of repair. In addition to the maximum depth of repair, except for tinkering: 0.001 to 0.002 inches. Except for finishing: 0.0005 to 0.001 inches.
7 Press the relevant manuals choose the right lateral quickness. The slower moving laterally (in the allowable range), the lower surface roughness obtained wheel.
8 must be within the specified time interval for dressing the grinding wheel to prevent the wheel blunt, the grinding force increases.
9 at predetermined intervals, the toolholder the dressing tool rotating 1/8 turn, to ensure that the dressing tool is always sharp.
10 When the diamond dresser or tool head blunt or obvious change in peacetime, should be timely adjusted and replaced.
11 According to the diameter of metal grinding wheel the wheel, the amount of a reasonable choice of diamond CARAT (pure diamond content), the larger wheel diameter, the larger the value of the selected CARAT diamond.
Incorrect:
1 diamond dressing tools in place to clamp head, be careful not to bump into the wheel surface.
2 can not be a single point diamond dressing tool head vertically aligned wheel center to be inclined generally 10 ~ 15 °.
3 heat dressing tools can not be "quenched" (refers to sudden cold). In the dry dressing must be kept trimmed twice the interval sufficient to heat the dressing tool cooling.
4 wheel surface can not be assumed to concrete cutting have ideal flat. When trimming the beginning to find the highest point of the wheel position for trimming.
5, if possible, in addition to the amount of each wheel of the repair, the radius of the wheel can not be more than 0.001 inches. In addition to the amount of the repair is too large diamond dressing tool head can cause premature wear and often broken.
2013年10月27日星期日
the stainless steel grinding wheel
he hardness of the stainless steel grinding wheel is generally within the range C ~ N, where J, K, L, M use of the wheel. Microcrystalline corundum grinding wheel face, the selection of appropriate hardness J. In addition, large diameter grinding wheel face bore or grinding, the grinding wheel and the workpiece contact surface, the wheel is easy step pads to passivation, to be elected lower hardness wheel; grinding forming surface, should increase the hardness of the wheel , otherwise they will be faster wheel wear and damage-surface precision grinding wheel; grinding hollow and thin wall of the workpiece, the workpiece deformation, and concrete blades therefore should adopt a softer wheel; discontinuous surface grinding, abrasive easy to fall off, you should use a hard wheel.Organization
Stainless steel toughness, strong adhesion, to avoid clogging the grinding wheel, grinding wheel organizations should diamond cup wheels choose a more loose, generally 5-8 is appropriate. Back to eat large knife and a large contact area should be selected organization loose wheel, the surface roughness Ra values that require low or form grinding should be used in a more compact organization of the wheel.the wheel before use, to floating tapping with a mallet, the sound should be crisp, metallic sound! If the sound is muffled, for the voiceless, usually in transit collision, absolutely not allowed!
Stainless steel toughness, strong adhesion, to avoid clogging the grinding wheel, grinding wheel organizations should diamond cup wheels choose a more loose, generally 5-8 is appropriate. Back to eat large knife and a large contact area should be selected organization loose wheel, the surface roughness Ra values that require low or form grinding should be used in a more compact organization of the wheel.the wheel before use, to floating tapping with a mallet, the sound should be crisp, metallic sound! If the sound is muffled, for the voiceless, usually in transit collision, absolutely not allowed!
Width of grinding wheel
Width of grinding wheel grinding force, grinding power, first of all wheel drive motor power have a reasonable margin. In addition, the main components of the machine should have high accuracy diamond blade saws and sufficient rigidity. If higher precision grinding wheel spindle, spindle elongation cantilever should be as short as possible, a reasonable choice of spindle bearing structures, such as hydrostatic bearing stiffness and rotation to obtain better accuracy. Workpiece headstock spindle and tailstock sleeve overhang minimize, the choice of a larger size, shorter overhang top, and as far as possible so that the headstock, tailstock rigid consistency. Tailstock sleeve spring should have sufficient clamping force. Wheel rack rails tile saw blade should also have sufficient rigidity.
Width of grinding wheel grinding heat large, so should supply sufficient grinding fluid. Estimated according to the following empirical formula Q = bs / 2 (where Q - Flow L / min bs - Wheel width mm).
Width of grinding wheel, grinding wheel airflow generated large grinding fluid nozzle and the wheel guard should be tuck point blades set block air baffle, the shape of the nozzle should ensure grinding fluid spray to the entire width of the grinding wheel, and a smoke fog devices.
Width of grinding wheel grinding with the best grinding force control device, so that both or full width of grinding wheel performance, and avoid overload grinding, in order to ensure safe operation.
Width of grinding wheel grinding heat large, so should supply sufficient grinding fluid. Estimated according to the following empirical formula Q = bs / 2 (where Q - Flow L / min bs - Wheel width mm).
Width of grinding wheel, grinding wheel airflow generated large grinding fluid nozzle and the wheel guard should be tuck point blades set block air baffle, the shape of the nozzle should ensure grinding fluid spray to the entire width of the grinding wheel, and a smoke fog devices.
Width of grinding wheel grinding with the best grinding force control device, so that both or full width of grinding wheel performance, and avoid overload grinding, in order to ensure safe operation.
2013年10月25日星期五
the circular blade in operation when beating deal
First, the circular blade in operation when beating deal?
Circular blade in operation when beating Processing Processing Cheats: Check the circular blade installation is in place; inspection work cut foot mounting surface if there is debris; checking the gap between the inner diameter of the rotating shaft.
Second, the circular blade crack how to do?
How do deal with circular blade crack Cheats: Before use, finger fingers hooked blade gently with a wooden hammer to knock several times, listening to the sound; after use: When installing the mounting surface can exist due to hard objects, fixed blade cracked when the force wood drill bits resulting ; addition to the above two cases, can break due to human or blade itself is a problem.
Third, the circular blade blade nicked how to do?
Nicked circular blade blade handle Cheats: cut legs for five minutes without idling and began to work; component foot diameter is too large, you can adjust the angle of blade to handle specific angles according to the diameter to the size of the foot elements.
Fourth, continue to cut feet wet polishing pad circular blade element how do?
Circular blade components continue to deal with the foot cut Cheats: whole foot or part of PCB components clearly score, check the PCB thickness and material, whether due to high temperature during welding deformation caused by PCB; tracks with adjustable blade gap distance smaller; whether Yuan blade used for too long, there were minor gaps without grinding.Circular blade to achieve a cost-effective application of the coating may depend on many factors, but for each specific processing applications, usually brick saw blades only one or several circular blade coating viable options. Circular blade coating and its properties are correct choice could mean significantly improved processing performance with almost no improvement between the two. Depth of cut, cutting speed and coolant are likely to circular blade tool coating application effect of impact.
Since the processing of the workpiece material in one kind, there are many variables, so selection of the circular blade coating to determine the best ways is through trial cut. Coating suppliers are constantly developing more new circular blade
Circular blade in operation when beating Processing Processing Cheats: Check the circular blade installation is in place; inspection work cut foot mounting surface if there is debris; checking the gap between the inner diameter of the rotating shaft.
Second, the circular blade crack how to do?
How do deal with circular blade crack Cheats: Before use, finger fingers hooked blade gently with a wooden hammer to knock several times, listening to the sound; after use: When installing the mounting surface can exist due to hard objects, fixed blade cracked when the force wood drill bits resulting ; addition to the above two cases, can break due to human or blade itself is a problem.
Third, the circular blade blade nicked how to do?
Nicked circular blade blade handle Cheats: cut legs for five minutes without idling and began to work; component foot diameter is too large, you can adjust the angle of blade to handle specific angles according to the diameter to the size of the foot elements.
Fourth, continue to cut feet wet polishing pad circular blade element how do?
Circular blade components continue to deal with the foot cut Cheats: whole foot or part of PCB components clearly score, check the PCB thickness and material, whether due to high temperature during welding deformation caused by PCB; tracks with adjustable blade gap distance smaller; whether Yuan blade used for too long, there were minor gaps without grinding.Circular blade to achieve a cost-effective application of the coating may depend on many factors, but for each specific processing applications, usually brick saw blades only one or several circular blade coating viable options. Circular blade coating and its properties are correct choice could mean significantly improved processing performance with almost no improvement between the two. Depth of cut, cutting speed and coolant are likely to circular blade tool coating application effect of impact.
Since the processing of the workpiece material in one kind, there are many variables, so selection of the circular blade coating to determine the best ways is through trial cut. Coating suppliers are constantly developing more new circular blade
Diamond wheel is grinding carbide
glass, ceramics, precious stones high brittle materials effects tools. In recent years, with high-speed grinding ultra-precision grinding technology developed rapidly, put a higher demand on the grinding wheel, ceramic resin bonded grinding wheel has been unable to meet production needs, because of its combination of metal bonded grinding wheel, high strength, good formability, long life and other significant characteristics of wood drill bits the production has been widely used. Metal bond diamond wheel manufacturers in different ways according to a major sintering, plating two types. In order to give full play to the role of super abrasive abroad from the 20th century, the early 90s with a high temperature brazing process to develop a new wheel, ie high temperature brazing monolayer superabrasive grinding wheels, this wheel is still in the current domestic research and development stage.
Ceramic diamond wheel vitrified diamond grinding wheel with diamond and vitrified common characteristics, and general 4 inch saw blades corundum, silicon carbide grinding wheel compared to its grinding force, grinding temperature is relatively low, the wheel wear is relatively small; can be adapted to each species coolant effect; grinding wheel is good shape retention, high precision grind the workpiece; wheel has more pores, grinding and heat conducive chip, clogging, easy to burn the workpiece; wheel good self-sharpening, finishing a long time interval, trimming easier. Therefore, vitrified diamond grinding wheel used in some foreign countries is increasing.
Sintered diamond wheel
Sintered metal-bonded grinding wheels mostly bronze and other metals as a binder, with the manufacture of high-temperature sintering method, which combines high strength, good formability, high ring saw blades temperature, thermal conductivity, good wear resistance, long life, can withstand greater loads.
Electroplated diamond grinding wheel:
① plating process is simple, less investment, ease of manufacture;
② without dressing, easy to use;
③ monolayer structure determines it can reach very high operating speed, the current foreign countries have been as high as 250 ~ 300m / s;
④ Although only a single layer of diamond, but there is still enough life;
⑤ For high accuracy, roller wheels, electroplated unique manufacturing method. Precisely because of these advantages, plating wheel speed, ultra-high speed grinding occupy undisputed dominance.
Ceramic diamond wheel vitrified diamond grinding wheel with diamond and vitrified common characteristics, and general 4 inch saw blades corundum, silicon carbide grinding wheel compared to its grinding force, grinding temperature is relatively low, the wheel wear is relatively small; can be adapted to each species coolant effect; grinding wheel is good shape retention, high precision grind the workpiece; wheel has more pores, grinding and heat conducive chip, clogging, easy to burn the workpiece; wheel good self-sharpening, finishing a long time interval, trimming easier. Therefore, vitrified diamond grinding wheel used in some foreign countries is increasing.
Sintered diamond wheel
Sintered metal-bonded grinding wheels mostly bronze and other metals as a binder, with the manufacture of high-temperature sintering method, which combines high strength, good formability, high ring saw blades temperature, thermal conductivity, good wear resistance, long life, can withstand greater loads.
Electroplated diamond grinding wheel:
① plating process is simple, less investment, ease of manufacture;
② without dressing, easy to use;
③ monolayer structure determines it can reach very high operating speed, the current foreign countries have been as high as 250 ~ 300m / s;
④ Although only a single layer of diamond, but there is still enough life;
⑤ For high accuracy, roller wheels, electroplated unique manufacturing method. Precisely because of these advantages, plating wheel speed, ultra-high speed grinding occupy undisputed dominance.
2013年10月24日星期四
Monolayer brazing diamond wheel introduction of some of the major
Using scanning electron microscopy showed white gold diamond silver wrapping around , X-ray diffraction analysis confirmed Cr3C2 generation, this carbide layer is achieved Diamond
Stone and steel substrate bonding strength between higher . Diamond grinding experiments also confirmed that tile saw blade there will grip strength, high temperature brazing monolayer diamond grinding wheel life and grinding efficiency than electroplated sand
Wheel has been significantly improved . Monolayer coating high temperature brazing diamond diamond wheel as poor thermal stability , 800 ℃ when the transition occurs graphite , so the higher soldering temperatures will inevitably lead to
Leaving diamond diamond intensity decreased thermal damage ; while binders harmful elements make diamond graphitization corrosion , it can be coated with a layer of diamond surface active metal
And then brazing alloys . Abrasive plating techniques include chemical vapor deposition, ion plating, thermal evaporation , vacuum evaporation plating such as micro- chemical vapor deposition Cr, Ti, vacuum micro evaporation plating can improve the surface properties of diamond . Brazing process , mediated by virtue of the role of the coating , in addition to diamond and easier to achieve strong metallurgical bond between the chemical bonding , the hot air as an oxygen barrier coating on leaving the role of carbon atoms in the diamond surface reacts with oxygen speed is greatly reduced, while strong carbide forming coating elements and diamond surface carbon atoms react carbide , closed diamond surface dangling bonds , increasing the oxidation resistance , thus inhibiting binding agent Fe, Co, Ni and other elements of the diamond itself, graphitization of diamond etching process, so that after brazing still maintain the original strength of the abrasive grain type . Brazing steel substrate when the first plating layer is pre- Ni-P alloy ( melting point 880 ℃), and the arrangement of the diamond film on the alloy layer , 1050 ℃ argon brazing 5min, then cooled to room temperature. Grinding tests dry core drill bits showed that the diamond coating and binding agent as a good wettability , and effectively avoid the grit off, greatly improves the performance of the grinding wheel , to achieve a substantial increase in processing efficiency wheel life .
It should be pointed out that as the diamond coating and binding agent between the deposit with adaptability , so only suitable binder coating process to make optimum physical and mechanical properties of diamond . Single high temperature brazing problems and countermeasures wheel kept at home and abroad wheel of high temperature brazing monolayer Although achieved good results , but its manufacturing process needs to be further improved. Currently retained, mainly as follows: one in what brazing process to produce the diamond bonding interface bonding strength with high chemical diamond polishing pads metallurgical bonding ; two suitable binding agent layer thickness and uniformity control ; three abrasive reasonable and orderly arrangement . For improving the bonding strength of the diamond and the brazing material , its key diamond brazing , brazing material between the metal substrate to produce three chemical metallurgical bonding , the solder alloy should contain a strong carbide forming elements ( such as Ti, Cr, V, etc. ) , and to seek lower temperature brazing of diamond to minimize the damage. Before brazing filler metal abrasive orderly arrangement to improve the consistency of thick cloth after brazing binder layer thickness uniformity is also very important. Work surface with abrasive wheel arrangement reasonably abrasive industry has been committed to the pursuit target , and is expected to achieve single grinding wheel .
Stone and steel substrate bonding strength between higher . Diamond grinding experiments also confirmed that tile saw blade there will grip strength, high temperature brazing monolayer diamond grinding wheel life and grinding efficiency than electroplated sand
Wheel has been significantly improved . Monolayer coating high temperature brazing diamond diamond wheel as poor thermal stability , 800 ℃ when the transition occurs graphite , so the higher soldering temperatures will inevitably lead to
Leaving diamond diamond intensity decreased thermal damage ; while binders harmful elements make diamond graphitization corrosion , it can be coated with a layer of diamond surface active metal
And then brazing alloys . Abrasive plating techniques include chemical vapor deposition, ion plating, thermal evaporation , vacuum evaporation plating such as micro- chemical vapor deposition Cr, Ti, vacuum micro evaporation plating can improve the surface properties of diamond . Brazing process , mediated by virtue of the role of the coating , in addition to diamond and easier to achieve strong metallurgical bond between the chemical bonding , the hot air as an oxygen barrier coating on leaving the role of carbon atoms in the diamond surface reacts with oxygen speed is greatly reduced, while strong carbide forming coating elements and diamond surface carbon atoms react carbide , closed diamond surface dangling bonds , increasing the oxidation resistance , thus inhibiting binding agent Fe, Co, Ni and other elements of the diamond itself, graphitization of diamond etching process, so that after brazing still maintain the original strength of the abrasive grain type . Brazing steel substrate when the first plating layer is pre- Ni-P alloy ( melting point 880 ℃), and the arrangement of the diamond film on the alloy layer , 1050 ℃ argon brazing 5min, then cooled to room temperature. Grinding tests dry core drill bits showed that the diamond coating and binding agent as a good wettability , and effectively avoid the grit off, greatly improves the performance of the grinding wheel , to achieve a substantial increase in processing efficiency wheel life .
It should be pointed out that as the diamond coating and binding agent between the deposit with adaptability , so only suitable binder coating process to make optimum physical and mechanical properties of diamond . Single high temperature brazing problems and countermeasures wheel kept at home and abroad wheel of high temperature brazing monolayer Although achieved good results , but its manufacturing process needs to be further improved. Currently retained, mainly as follows: one in what brazing process to produce the diamond bonding interface bonding strength with high chemical diamond polishing pads metallurgical bonding ; two suitable binding agent layer thickness and uniformity control ; three abrasive reasonable and orderly arrangement . For improving the bonding strength of the diamond and the brazing material , its key diamond brazing , brazing material between the metal substrate to produce three chemical metallurgical bonding , the solder alloy should contain a strong carbide forming elements ( such as Ti, Cr, V, etc. ) , and to seek lower temperature brazing of diamond to minimize the damage. Before brazing filler metal abrasive orderly arrangement to improve the consistency of thick cloth after brazing binder layer thickness uniformity is also very important. Work surface with abrasive wheel arrangement reasonably abrasive industry has been committed to the pursuit target , and is expected to achieve single grinding wheel .
PDC with diamond grinding wheel
Resin bond diamond grinding wheel for grinding diamond composite film in the presence of grinding efficiency , low processing composite sheet size consistency is poor, grinding noise and other issues, knot
Together vitrified diamond wheel features green concrete blades which are designed with a diamond wheel can be developed instead of vitrified resin bond to overcome these shortcomings. Its main characteristics and test results are summarized as follows:
1 . For high-temperature stability of the diamond abrasive tests and found that above 700 ℃, diamond abrasive occurs in air oxidation , the diamond
Abrasive damage ; diamond abrasive high degree of thermal damage to the diamond abrasive grade, particle size about the same temperature , the lower the grade , the finer the particle size , the diamond abrasive by a higher degree of heat damage ; engineer changes sintering process step pads reduces 750 ℃ high temperature diamond abrasive itself against thermal damage . Combined with diamond abrasives
Thermal stability and PDC diamond grinding characteristics of selected ceramic composite sheet as grinding diamond wheel .
PDC grinding tests , processing coal geology PDC life in 1600-2000 pieces ; processing performance PDC oil life in 1200-1400 film. And resin bond compared to the grinding process, the grinding is mainly found in the composite film rubbed off the excess composite sheet cylindrical diamond , the diamond
Very hard , when using resin bonded grinding wheel , since the resin bond diamond wheel grinding wheel in order to diamond cup wheels ensure durability, generally done very dense, almost no gas
Hole , so grinding grinding force particularly large, grinding spindle great harm ; And very sharp wheel , grinding wheel will feed large knife , and send clamor cry ; mill
Cutting efficiency is very low . The vitrified diamond grinding wheel due to porosity, good self-sharpening wheel for grinding spindle hurt small ; wheel sharp , high grinding efficiency
Together vitrified diamond wheel features green concrete blades which are designed with a diamond wheel can be developed instead of vitrified resin bond to overcome these shortcomings. Its main characteristics and test results are summarized as follows:
1 . For high-temperature stability of the diamond abrasive tests and found that above 700 ℃, diamond abrasive occurs in air oxidation , the diamond
Abrasive damage ; diamond abrasive high degree of thermal damage to the diamond abrasive grade, particle size about the same temperature , the lower the grade , the finer the particle size , the diamond abrasive by a higher degree of heat damage ; engineer changes sintering process step pads reduces 750 ℃ high temperature diamond abrasive itself against thermal damage . Combined with diamond abrasives
Thermal stability and PDC diamond grinding characteristics of selected ceramic composite sheet as grinding diamond wheel .
PDC grinding tests , processing coal geology PDC life in 1600-2000 pieces ; processing performance PDC oil life in 1200-1400 film. And resin bond compared to the grinding process, the grinding is mainly found in the composite film rubbed off the excess composite sheet cylindrical diamond , the diamond
Very hard , when using resin bonded grinding wheel , since the resin bond diamond wheel grinding wheel in order to diamond cup wheels ensure durability, generally done very dense, almost no gas
Hole , so grinding grinding force particularly large, grinding spindle great harm ; And very sharp wheel , grinding wheel will feed large knife , and send clamor cry ; mill
Cutting efficiency is very low . The vitrified diamond grinding wheel due to porosity, good self-sharpening wheel for grinding spindle hurt small ; wheel sharp , high grinding efficiency
2013年10月23日星期三
Affect the efficiency of diamond saw blade main reason
One , sawing parameters:
( 1 ) blade speed : In practice , the line speed diamond saw blades by equipment conditions , saw the quality and the nature of the restrictions before sawing stone . From the optimum blade life and cutting efficiency , it should be selected depending on the nature of the stone saw blade speed . Sawing granite , the blade speed at 25m ~ 35m / s within the selected range . For high quartz content and difficult cutting granite , remove the blade speed limit is appropriate. Granite tiles in the sds hammer drill bits production , the use of smaller diameter diamond saw blade , the line speed can reach 35m / s.
( 2 ) Cutting Depth : diamond cutting depth is related to wear , effective cutting , saw cutting force conditions and the nature of the important parameters of stone . Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth , from the current technology , the cutting depth of the diamond can choose between 1mm ~ 10mm . Usually with a large diameter saw blade cutting granite blocks , the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time . When the line speed diamond saw blade is stone polishing pads large , a large cutting depth should be selected . But in performance and tool strength saw the extent permitted , should try to take a greater depth of cut for cutting to improve cutting efficiency . When the machined surface when requested , should be used small depth of cut .
( 3 ) Feed speed : Cutting feedrate incurs stone feed rate . Its size sawing rate impact , the force and the cutting blade heat dissipation area . Its value should be based on the nature of the selected cutting stone . Generally speaking , sawing softer stone, such as marble, may industrial saw blades be appropriate to increase the feed speed , if the feed rate is too low, more conducive to high cutting rates . Sawing fine structure , relatively homogeneous granite, may be appropriate to increase the feed speed , feed rate is too low if the diamond blade easily be polished . But sawing UNEVEN coarse granite structure , should reduce feed speed , otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates . Granite cutting feed rate is generally 9m ~ 12m/min within the selected range .
( 1 ) blade speed : In practice , the line speed diamond saw blades by equipment conditions , saw the quality and the nature of the restrictions before sawing stone . From the optimum blade life and cutting efficiency , it should be selected depending on the nature of the stone saw blade speed . Sawing granite , the blade speed at 25m ~ 35m / s within the selected range . For high quartz content and difficult cutting granite , remove the blade speed limit is appropriate. Granite tiles in the sds hammer drill bits production , the use of smaller diameter diamond saw blade , the line speed can reach 35m / s.
( 2 ) Cutting Depth : diamond cutting depth is related to wear , effective cutting , saw cutting force conditions and the nature of the important parameters of stone . Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth , from the current technology , the cutting depth of the diamond can choose between 1mm ~ 10mm . Usually with a large diameter saw blade cutting granite blocks , the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time . When the line speed diamond saw blade is stone polishing pads large , a large cutting depth should be selected . But in performance and tool strength saw the extent permitted , should try to take a greater depth of cut for cutting to improve cutting efficiency . When the machined surface when requested , should be used small depth of cut .
( 3 ) Feed speed : Cutting feedrate incurs stone feed rate . Its size sawing rate impact , the force and the cutting blade heat dissipation area . Its value should be based on the nature of the selected cutting stone . Generally speaking , sawing softer stone, such as marble, may industrial saw blades be appropriate to increase the feed speed , if the feed rate is too low, more conducive to high cutting rates . Sawing fine structure , relatively homogeneous granite, may be appropriate to increase the feed speed , feed rate is too low if the diamond blade easily be polished . But sawing UNEVEN coarse granite structure , should reduce feed speed , otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates . Granite cutting feed rate is generally 9m ~ 12m/min within the selected range .
A detailed description of the blade cutting parameters
Diamond saw blade cutting parameters
( 1 ) diamond blade speed : in practical work , diamond saw blade speed by equipment conditions , saw the quality and the nature of the restrictions before sawing stone . From the optimum blade life and cutting efficiency , it should be selected depending on the nature granite blade of the stone saw blade speed . Sawing granite , the blade speed at 25m ~ 35m / s within the selected range . For high quartz content and difficult cutting granite , remove the blade speed limit is appropriate. In the production of granite tiles , the use of smaller diameter diamond saw blade , wire speed can reach 35m / s.
( 2 ) Cutting Depth : diamond cutting depth is related to wear , effective cutting , saw cutting force conditions and the nature of the important parameters of stone . Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth , from the current technology , the cutting depth of the diamond can choose between 1mm ~ 10mm . Usually with a large diameter saw blade cutting granite fibre discs blocks , the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time . When the line speed diamond saw blade is large , a large cutting depth should be selected . But in performance and tool strength saw the extent permitted , should try to take a greater depth of cut for cutting to improve cutting efficiency . When the machined surface when requested , should be used small depth of cut . ( 3 ) diamond saw blade feed rate : Feed speed incurs sawing stone feed rate . Its size sawing Plate Compactor rate impact , the force and the cutting blade heat dissipation area . Its value should be based on the nature of the selected cutting stone . Generally speaking , sawing softer stone, such as marble, may be appropriate to increase the feed speed , if the feed rate is too low, more conducive to high cutting rates . Sawing fine structure , relatively homogeneous granite, may be appropriate to increase the feed speed , feed rate is too low if the diamond blade easily be polished . But sawing UNEVEN coarse granite structure , should reduce feed speed , otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates . Granite cutting feed rate is generally 9m ~ 12m/min within the selected range .
( 1 ) diamond blade speed : in practical work , diamond saw blade speed by equipment conditions , saw the quality and the nature of the restrictions before sawing stone . From the optimum blade life and cutting efficiency , it should be selected depending on the nature granite blade of the stone saw blade speed . Sawing granite , the blade speed at 25m ~ 35m / s within the selected range . For high quartz content and difficult cutting granite , remove the blade speed limit is appropriate. In the production of granite tiles , the use of smaller diameter diamond saw blade , wire speed can reach 35m / s.
( 2 ) Cutting Depth : diamond cutting depth is related to wear , effective cutting , saw cutting force conditions and the nature of the important parameters of stone . Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth , from the current technology , the cutting depth of the diamond can choose between 1mm ~ 10mm . Usually with a large diameter saw blade cutting granite fibre discs blocks , the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time . When the line speed diamond saw blade is large , a large cutting depth should be selected . But in performance and tool strength saw the extent permitted , should try to take a greater depth of cut for cutting to improve cutting efficiency . When the machined surface when requested , should be used small depth of cut . ( 3 ) diamond saw blade feed rate : Feed speed incurs sawing stone feed rate . Its size sawing Plate Compactor rate impact , the force and the cutting blade heat dissipation area . Its value should be based on the nature of the selected cutting stone . Generally speaking , sawing softer stone, such as marble, may be appropriate to increase the feed speed , if the feed rate is too low, more conducive to high cutting rates . Sawing fine structure , relatively homogeneous granite, may be appropriate to increase the feed speed , feed rate is too low if the diamond blade easily be polished . But sawing UNEVEN coarse granite structure , should reduce feed speed , otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates . Granite cutting feed rate is generally 9m ~ 12m/min within the selected range .
2013年10月22日星期二
during the grinding the grinding characteristics of
1 deformation complex grinding process to produce chips stacked like squeeze crack.(2) the grinding process, the grinding wheel adhesion severe adhesion loss can lead to wheel abrasive material diamond core drills crushing and shedding.3 grinding force, grinding temperature is high, the normal force per unit width reaches 13N/mm about tangential grinding force per unit width reaches 9N/mm so. Grinding temperature reaches 650 degrees.4 high chemical activity, if titanium silicon carbide grinding wheel when the grinding action of heat, the silicon and oxygen in the air react to produce silicon oxide, the release concrete pads of heat, so that the surface layer by layer abrasive erosion, wheel causes oxidation wear, and that react with the titanium carbide, titanium carbide, resulting in the spread of wheel wear.he main difference is the type of binding agent: resin bonded diamond grinding wheel mainly phenolic resin and a small amount of metal powder as a binder, and tct blades electroplated diamond grinding wheel is a method by electrodeposition of nickel-cobalt alloy is deposited on the metal substrate surface and fixed to a diamond abrasive wheel production process.grinding force, grinding temperature is high, the normal force per unit width reaches 13N/mm about tangential grinding force per unit width reaches 9N/mm so. Grinding temperature reaches 650 degrees.
ost-effective way to improve the grinding wheel
the best way to improve the cost of: grinding the core of the sheet is not part of the cutting action in a poor quality and low price instead of a secondary abrasive, abrasive cutting quality full performance, lower manufacturing costs.Sheet wheel performance depends largely on the merits of using abrasive quality, good quality abrasives, grinding wheels, high grade, and in the more expensive price. As the domestic high-grade bauxite green concrete blades resource depletion, a variety of raw materials and coal prices in mid-rise, coupled with energy saving the environment forced shut down, corundum prices are rising fast, from time to time will be in short supply. How rational use abrasives, improve market competitiveness, is the most important enterprises grinding technology considerations.Best approach is to not participate in the core sheet wheel portion of the cutting action of poor quality with low prices instead of secondary abrasive, abrasive cutting quality full performance, lower manufacturing costs. This approach resin bolts and large diameter cylindrical grinding wheel resin grinding wheel has been widely used. For thin grinding wheel, since the intermediate screening, the polishing pads for granite bottom and the top to separate the feed, if the external and the core are stepwise feeding, in the process to implement quite difficult, is still only vision in the future, if successful, cost reduction, profit improvement , on sheet wheel manufacturing is undoubtedly a far-reaching "technological revolution."Compare prices now wear suitable strategy for various consumer groups, in accordance with abrasive made of different grades of abrasive products, the best abrasive used in most need sheet wheel, avoiding production of low-grade abrasive grinding wheels with high-grade, as far as possible best use, cost-effective in improving the premise, a great effort for each grade of the product have done "extreme."High-grade sheet wheel stable, targeted, reproducible production has generally adopted a sand, special cup grinding wheels products and even to use zirconium corundum, calcined alumina abrasive and post-processing. The market is dominated by imported products, most cost-effective production of high sheet is not high, not discrimination, targeted not strong, still need further research and development efforts.If you use an ordinary sheet wheel sand, cost is very low, almost no profit, now commonly used two sand instead. The so-called two sand, refers to those standards is not abrasive, aluminum oxide content of about 80% of corundum, good quality two sands, also known as a second, different origin, different batches of two sand quality fluctuation range large. Sand production sheet wheel with two main problems is the wheel performance is unstable, different batches of the same recipe abrasives, grinding wheels produced poor reproducibility, good times and bad
2013年10月21日星期一
Bit matrix performance design
Based on these two points, bit matrix performance design should include
steel bonded carbide type carcass composition and its properties. Type
of steel bonded carbide matrix diamond drill design and research, in
order to replace most of the metal grinding wheel tungsten carbide alloy, based on a certain
amount of nickel, cobalt, manganese, titanium, chromium, molybdenum and
other materials, and rare earth elements in hot conditions with the
formation of a certain hardness, wear resistance and can be securely
appropriate package insert diamond steel bonded carbide matrix [1]. We
focus on the matrix hardness, wear resistance and firmness diamond bezel
setting. Type of steel bonded carbide matrix material, you also need a
certain amount of phosphorous alloy material to replace part of pure
iron. Adding phosphorus alloy aims to reduce the sintering temperature
and increase the performance of the carcass brittle [3], and in favor of
a diamond blade in the matrix to improve the drilling time. In order to
control the phosphorus content in the matrix, in addition to a
phosphorus alloy powder, the pure iron carbonyl must join to control the
phosphorus content and improving the performance of the carcass. 1.2
steel bonded carbide type carcass test: For hard and compact rock
characteristics, drilling practices and diamond polishing pads preliminary studies indicate
that the matrix hardness to diamond drill HRB108 ~ HRB115 more
appropriate, the wear amount of lower-middle (260 mg ~ 370 mg) is ideal.
Steel bonded carbide type carcass preliminary trials have shown that in
order to achieve these targets, the carcass of the basic formula is as
follows: P 2 iron content of 40% to 48%, as a binder metal content of
26% tin bronze ~ 32% tungsten content of 12% ~ 28%, Ni content of 5% to
10%, the cobalt content of 3% to 7%, and the remaining ingredients are
titanium, manganese, molybdenum, chromium, and rare earth. According to
this basic ratio, the sintering process in a reasonable condition,
carcass materials and manufactured diamond drill has better adaptability
and drilling results. Process for hot carcass performance will have a
significant impact, which obviously affect the sintering temperature and
pressure [4]. Therefore, in the diamond blades study of steel bonded carbide matrix,
sintering temperature and pressure must be incorporated into the design
factors. Iron at high temperatures the diamond has some heat damage, it
should be shortened by rapid sintering and holding time. In this test,
the sintering process is designed to: sintering temperature 960 ℃,
pressure parameters 16 MPa, holding time 4 min. Sintering in SM1002A
carcass type resistance furnace controlled intelligent. The combination
of hot-pressing process is the result of many experiments and analysis
finalized, so it is reasonable. According to the above-mentioned range
of carcass composition and sintering processes, uniform design
experiments to study the carcass composition of steel bonded carbide
type changes on the carcass performance were investigated. In accordance
with the uniform design method, the experimental design of the 16 matrix
formula combinations in Table 1. Select the matrix hardness and wear
resistance properties of the target for the carcass. Matrix hardness
testing using HR - 150A Rockwell hardness tester, and select HRB as
measured values, for each combination of two samples of prototype
formulations, both sides of the direction of the pressure measured
twice, 8 hardness data were measured, taking Examples of the formulation
the average hardness value....
steel bonded carbide type carcass composition and its properties. Type
of steel bonded carbide matrix diamond drill design and research, in
order to replace most of the metal grinding wheel tungsten carbide alloy, based on a certain
amount of nickel, cobalt, manganese, titanium, chromium, molybdenum and
other materials, and rare earth elements in hot conditions with the
formation of a certain hardness, wear resistance and can be securely
appropriate package insert diamond steel bonded carbide matrix [1]. We
focus on the matrix hardness, wear resistance and firmness diamond bezel
setting. Type of steel bonded carbide matrix material, you also need a
certain amount of phosphorous alloy material to replace part of pure
iron. Adding phosphorus alloy aims to reduce the sintering temperature
and increase the performance of the carcass brittle [3], and in favor of
a diamond blade in the matrix to improve the drilling time. In order to
control the phosphorus content in the matrix, in addition to a
phosphorus alloy powder, the pure iron carbonyl must join to control the
phosphorus content and improving the performance of the carcass. 1.2
steel bonded carbide type carcass test: For hard and compact rock
characteristics, drilling practices and diamond polishing pads preliminary studies indicate
that the matrix hardness to diamond drill HRB108 ~ HRB115 more
appropriate, the wear amount of lower-middle (260 mg ~ 370 mg) is ideal.
Steel bonded carbide type carcass preliminary trials have shown that in
order to achieve these targets, the carcass of the basic formula is as
follows: P 2 iron content of 40% to 48%, as a binder metal content of
26% tin bronze ~ 32% tungsten content of 12% ~ 28%, Ni content of 5% to
10%, the cobalt content of 3% to 7%, and the remaining ingredients are
titanium, manganese, molybdenum, chromium, and rare earth. According to
this basic ratio, the sintering process in a reasonable condition,
carcass materials and manufactured diamond drill has better adaptability
and drilling results. Process for hot carcass performance will have a
significant impact, which obviously affect the sintering temperature and
pressure [4]. Therefore, in the diamond blades study of steel bonded carbide matrix,
sintering temperature and pressure must be incorporated into the design
factors. Iron at high temperatures the diamond has some heat damage, it
should be shortened by rapid sintering and holding time. In this test,
the sintering process is designed to: sintering temperature 960 ℃,
pressure parameters 16 MPa, holding time 4 min. Sintering in SM1002A
carcass type resistance furnace controlled intelligent. The combination
of hot-pressing process is the result of many experiments and analysis
finalized, so it is reasonable. According to the above-mentioned range
of carcass composition and sintering processes, uniform design
experiments to study the carcass composition of steel bonded carbide
type changes on the carcass performance were investigated. In accordance
with the uniform design method, the experimental design of the 16 matrix
formula combinations in Table 1. Select the matrix hardness and wear
resistance properties of the target for the carcass. Matrix hardness
testing using HR - 150A Rockwell hardness tester, and select HRB as
measured values, for each combination of two samples of prototype
formulations, both sides of the direction of the pressure measured
twice, 8 hardness data were measured, taking Examples of the formulation
the average hardness value....
How to choose diamond drill bit according to the rock properties
For the hard rock drilling and dense low efficiency problem, this paper
analyzes the tungsten carbide-based hot drill diamond protrusion such as
lithology and rock abrasiveness intrinsic link between that drill
carcass composition and its performance is tamping rammer critical , hard and brittle
with a carcass beneficial properties of the diamond blade, which can
increase the drilling speed. Therefore, from diamond drill hot carcass
composition and properties of the start, after repeated experimental
research, trial out of the hot steel bonded carbide type impregnated
diamond bit. In the hard and dense rock drilling field tests showed
that: with ordinary tungsten-based drill compared to drilling aging by
the 0. 5 m / h up to 1. 18 m / h, drill working life by a 10 m / a
increased to 21. 31 m / a, basically solved the hard and dense rock
drilling difficult problem. Experimental results show that the type of
steel bonded carbide matrix is wet diamond polishing pads an excellent diamond drill carcass
material, the type of hot carcass diamond drill is a kind of a broad
spectrum of diamond drill bits. Foreword traditional hot tungsten
carbide-based diamond drill is widely used in geological prospecting.
Tungsten carbide-based diamond bit high abrasion resistance, better
adaptability for rock. However, this type of drill bit for hard - hard
and dense rock formations exhibit adaptability unsatisfactory drilling
less effective, while 08 1994-2010 China Academic Journal Electronic
Publishing House. All rights reserved. Http:/ / www.cnki.net Diamond &
Abrasives Engineering Total No. 168 effective only 0. 40 m / h ~ 0. 50 m
/ h, working life of only 8 m ~ 10 m. Meanwhile, in recent years,
tungsten carbide, cobalt, nickel and other metal materials prices, the
cost of diamond drill increased significantly. In order to improve drill
hard and dense rock drill drilling performance and reduce costs, we have
gone through nearly two years of experimental research, successfully
developed a type of hot carcass steel bonded carbide impregnated diamond
drill bit. Steel bonded carbide type of steel bonded carbide matrix is
designed based on the idea, its composition and cutting discs the ratio of the larger
changes were made, including tungsten carbide, cobalt and other
materials was significantly lower, at a reasonable thermal pressure
condition of the carcass is formed. A carcass Test 1.1 steel bonded
carbide type carcass performance design for hard and dense rock
formations, to improve the diamond bit drilling results, we must have
two basic conditions: ① with the wear resistance of the carcass
abrasive rock drilling performance to adapt bit matrix slightly ahead in
the process of drilling diamond wear, so that the carcass of a diamond
blade can be timely to ensure effective cutting rocks. ② requirements
of the diamond matrix alloys have a solid package insert effect, there
is a higher blade without shedding [2], the carcass of the diamond can
be a long time to maintain a sharp cutting results. To achieve these
goals, we must study the type of steel bonded carbide matrix can improve
the wetting adding diamond alloy composition.
analyzes the tungsten carbide-based hot drill diamond protrusion such as
lithology and rock abrasiveness intrinsic link between that drill
carcass composition and its performance is tamping rammer critical , hard and brittle
with a carcass beneficial properties of the diamond blade, which can
increase the drilling speed. Therefore, from diamond drill hot carcass
composition and properties of the start, after repeated experimental
research, trial out of the hot steel bonded carbide type impregnated
diamond bit. In the hard and dense rock drilling field tests showed
that: with ordinary tungsten-based drill compared to drilling aging by
the 0. 5 m / h up to 1. 18 m / h, drill working life by a 10 m / a
increased to 21. 31 m / a, basically solved the hard and dense rock
drilling difficult problem. Experimental results show that the type of
steel bonded carbide matrix is wet diamond polishing pads an excellent diamond drill carcass
material, the type of hot carcass diamond drill is a kind of a broad
spectrum of diamond drill bits. Foreword traditional hot tungsten
carbide-based diamond drill is widely used in geological prospecting.
Tungsten carbide-based diamond bit high abrasion resistance, better
adaptability for rock. However, this type of drill bit for hard - hard
and dense rock formations exhibit adaptability unsatisfactory drilling
less effective, while 08 1994-2010 China Academic Journal Electronic
Publishing House. All rights reserved. Http:/ / www.cnki.net Diamond &
Abrasives Engineering Total No. 168 effective only 0. 40 m / h ~ 0. 50 m
/ h, working life of only 8 m ~ 10 m. Meanwhile, in recent years,
tungsten carbide, cobalt, nickel and other metal materials prices, the
cost of diamond drill increased significantly. In order to improve drill
hard and dense rock drill drilling performance and reduce costs, we have
gone through nearly two years of experimental research, successfully
developed a type of hot carcass steel bonded carbide impregnated diamond
drill bit. Steel bonded carbide type of steel bonded carbide matrix is
designed based on the idea, its composition and cutting discs the ratio of the larger
changes were made, including tungsten carbide, cobalt and other
materials was significantly lower, at a reasonable thermal pressure
condition of the carcass is formed. A carcass Test 1.1 steel bonded
carbide type carcass performance design for hard and dense rock
formations, to improve the diamond bit drilling results, we must have
two basic conditions: ① with the wear resistance of the carcass
abrasive rock drilling performance to adapt bit matrix slightly ahead in
the process of drilling diamond wear, so that the carcass of a diamond
blade can be timely to ensure effective cutting rocks. ② requirements
of the diamond matrix alloys have a solid package insert effect, there
is a higher blade without shedding [2], the carcass of the diamond can
be a long time to maintain a sharp cutting results. To achieve these
goals, we must study the type of steel bonded carbide matrix can improve
the wetting adding diamond alloy composition.
2013年10月11日星期五
Trimming cutter grinding wheel surface generally
removed from blunt or abrasive ceramic particles in an effort to reduce the grinding temperature and improving the Plate Compactor surface roughness and improve the grinding wheel small tolerance machined workpiece capacity. Trimming tool is also used for finishing grinding wheel. In the past, most of the trimming and finishing operations are fixed into the rotating grinding wheel dressing tool, this tool is often trimmed with made of single-crystal diamond or PCD.Today, many high productivity CNC grinding operation using rotating or sharp dresser dressing roller. When floor polisher pads the wheel side of the workpiece, its other side on the same time are continuously refreshed. CNC rotary trimmer can accommodate more than 100 same diamond, these small diamond pieces mounted on the outside diameter of the dresser, in the grinding wheel to generate a unique shape.Laser cutting, independent CVD diamond dressing tools give users and 14 inch saw blade producers many unique advantages. CVD diamond structure can be designed and manufactured to have a higher fracture toughness and strength, so as to optimize tool life and dimensional stability trimming purposes.Because CVD diamond is cut into thin slices, which can minimize or eliminate the problems associated with single-crystal diamond, such as natural diamond shape constraints and the inherent variability and so on. Finally, CVD diamond material can be manufactured into high aspect ratio (eg: 8mm × 1mm × 1mm), CVD diamond dressing tools mounted on a cost-effective, extend life and improve the efficiency dressing.
The chemical composition of diamond and graphite are carbon
scientists call "homogeneous much like variant", there are also known as "allotropes." From this call may know that they have the same "quality", but the "shape" or "sex" is different, and there diamond cup grinding wheel is a world of difference, diamond is the hardest substance, while graphite is one of the softest material. We all know that with graphite pencil and clay ratio and made of graphite as many soft, with a "B" indicates, more than the hard clay mixed with "H" represents. Mineralogist with Mohs hardness expressed relative hardness, diamond is 10, while graphite is only a Mohs hardness. Their hardness big difference lies in their internal structure is very different.
Graphite carbon atoms are within the layered arrangement, only around one carbon atom with three carbon atoms attached, form a carbon to carbon hexagonal ring, an infinite number of a layer of hexagons. Contact force between the layers is weak, and contact layer is firmly three ceramic tile saw carbon atoms, by the force between layers so it is easy to slip, which is very soft to write graphite causes.
Diamond carbon atoms are within the "skeleton" shaped arrangement of three-dimensional space, one carbon atom is surrounded by four carbon atom, thus forming a three-dimensional space in a skeleton-like, this structure is uniform in all directions, contact force, very strong coupling, Therefore, the diamond has a high hardness properties.
Graphite and diamond hardness vary so much, but people still want to be able to get the diamond synthetic method, because the nature of graphite (carbon) reserves are very rich. But to make the bandsaw blades carbon graphite are arranged into a diamond like carbon, is not so easy. The late eighteenth century, people began to look for ways of synthesis, until the mid-century. 1938 Rossini scholar thermodynamic calculation, laid the theoretical foundation of synthetic diamond, calculated to make the graphite into a diamond, at least at 15,000 atmospheres, 1500 degrees Celsius under high temperature conditions can, to built 50-60 years to achieve the above conditions Instrument. Graphite 5-6 million atmospheres ((5-6) × 103MPa) and 1000 to 2000 ° C temperatures, then the metallic iron, cobalt, nickel and the like as catalyst, can graphite into diamond.
Graphite carbon atoms are within the layered arrangement, only around one carbon atom with three carbon atoms attached, form a carbon to carbon hexagonal ring, an infinite number of a layer of hexagons. Contact force between the layers is weak, and contact layer is firmly three ceramic tile saw carbon atoms, by the force between layers so it is easy to slip, which is very soft to write graphite causes.
Diamond carbon atoms are within the "skeleton" shaped arrangement of three-dimensional space, one carbon atom is surrounded by four carbon atom, thus forming a three-dimensional space in a skeleton-like, this structure is uniform in all directions, contact force, very strong coupling, Therefore, the diamond has a high hardness properties.
Graphite and diamond hardness vary so much, but people still want to be able to get the diamond synthetic method, because the nature of graphite (carbon) reserves are very rich. But to make the bandsaw blades carbon graphite are arranged into a diamond like carbon, is not so easy. The late eighteenth century, people began to look for ways of synthesis, until the mid-century. 1938 Rossini scholar thermodynamic calculation, laid the theoretical foundation of synthetic diamond, calculated to make the graphite into a diamond, at least at 15,000 atmospheres, 1500 degrees Celsius under high temperature conditions can, to built 50-60 years to achieve the above conditions Instrument. Graphite 5-6 million atmospheres ((5-6) × 103MPa) and 1000 to 2000 ° C temperatures, then the metallic iron, cobalt, nickel and the like as catalyst, can graphite into diamond.
2013年10月10日星期四
CVD diamond coated with amorphous diamond coating difference Amorphous diamond
coatings are deposited using a PVD process carbon. It has a key part of the diamond SP3, SP2 also has some carbon bond; their film hardness is high, but lower than the hardness of diamond film; thickness than we usually deposited diamond film to be thinner. Machining graphite, amorphous diamond coated tool life is uncoated carbide tools 2-3 times. In contrast, CVD diamond is deposited using CVD process pure diamond coating, machining carbide tipped saw blade graphite carbide cutting tool life is 12-20 times, thereby reducing the number of tool changes to improve the reliability and accuracy of processing consistency.
(2) can not be used diamond tool machining hardened steel
Diamond from carbon atoms. Certain materials when heated, sucked from the carbon atoms in diamond and carbide is formed in the workpiece. Iron is one such material. Cutting tools with diamond iron group material, the friction generated heat causes diffusion of carbon atoms in the diamond into the iron, the resulting diamond coating due to chemical wear and premature failure.
(3) re-grinding and (or) heavy coating construction tools of diamond coated tools is difficult to guarantee the quality of the coating formed on the surface as the tool for the pure diamond, so the tool with a diamond wheel for re-grinding takes a very long time. In addition, the growth of the diamond tool used. Preparation of the tool will change the chemical properties of the surface, since the coating of this chemical properties requires very precise control, so the effect of the tool recoating difficult to be guaranteed.
(4) diamond coated tool life varies
Like any other tool, diamond coated tool life varies, depending on the material to be cut, the choice of feed rate and cutting speed, and the geometry of the workpiece and so on. Generally, diamond-coated graphite machining tool life is uncoated carbide tools 10-20 times, in some cases, may even be longer. This way, you can use a tool to complete almost any processing tasks without tool change due to tool wear and to avoid disruption and recalibration process, making it possible to achieve unattended machining. The processing of the composite material, is entirely possible to obtain a longer tool life.
According to reports, in the processing of cutting discs high-density glass fiber, carbon fiber and Gl0-FR4 other difficult machining composite materials, diamond-coated tool life up to uncoated carbide tool 70 times.
(5) diamond coating spalling can prevent flaking coating of diamond-coated tools are a serious problem, but also a common problem (especially in the processing of materials like carbon fiber), will lead to unpredictable tool life. The late 1990s, interfacial chemical properties were identified as affecting the diamond coating adhesion properties of important factors. By selecting good compatibility Carbide chemical characteristics, the use of appropriate technology and reasonable pre-deposition reaction conditions, it is possible to reduce or eliminate the diamond coating spalling, stably smooth wear patterns. Observed under the microscope normal wear diamond coated tool, you can find the diamond was worn until stable carbide substrate, without chipping or peeling.
(2) can not be used diamond tool machining hardened steel
Diamond from carbon atoms. Certain materials when heated, sucked from the carbon atoms in diamond and carbide is formed in the workpiece. Iron is one such material. Cutting tools with diamond iron group material, the friction generated heat causes diffusion of carbon atoms in the diamond into the iron, the resulting diamond coating due to chemical wear and premature failure.
(3) re-grinding and (or) heavy coating construction tools of diamond coated tools is difficult to guarantee the quality of the coating formed on the surface as the tool for the pure diamond, so the tool with a diamond wheel for re-grinding takes a very long time. In addition, the growth of the diamond tool used. Preparation of the tool will change the chemical properties of the surface, since the coating of this chemical properties requires very precise control, so the effect of the tool recoating difficult to be guaranteed.
(4) diamond coated tool life varies
Like any other tool, diamond coated tool life varies, depending on the material to be cut, the choice of feed rate and cutting speed, and the geometry of the workpiece and so on. Generally, diamond-coated graphite machining tool life is uncoated carbide tools 10-20 times, in some cases, may even be longer. This way, you can use a tool to complete almost any processing tasks without tool change due to tool wear and to avoid disruption and recalibration process, making it possible to achieve unattended machining. The processing of the composite material, is entirely possible to obtain a longer tool life.
According to reports, in the processing of cutting discs high-density glass fiber, carbon fiber and Gl0-FR4 other difficult machining composite materials, diamond-coated tool life up to uncoated carbide tool 70 times.
(5) diamond coating spalling can prevent flaking coating of diamond-coated tools are a serious problem, but also a common problem (especially in the processing of materials like carbon fiber), will lead to unpredictable tool life. The late 1990s, interfacial chemical properties were identified as affecting the diamond coating adhesion properties of important factors. By selecting good compatibility Carbide chemical characteristics, the use of appropriate technology and reasonable pre-deposition reaction conditions, it is possible to reduce or eliminate the diamond coating spalling, stably smooth wear patterns. Observed under the microscope normal wear diamond coated tool, you can find the diamond was worn until stable carbide substrate, without chipping or peeling.
Diamond saw blade matrix heat treatment process
Diamond saw blade matrix heat treatment process, diamond saw blade is mainly used for cutting hard and brittle stone , it is the production of natural stone plate one of the main tools , the use sanding paper of conventional abrasives and equipment will have a range of issues , such as quality, ruggedness , flaking and production of excess costs. They can not win the competition and profit. These companies in order to obtain high efficiency are looking for new equipment, which often is used superabrasive tool and design. Refinement rough casting and forging parts production can reduce many of the pre- processing operations.
Using new materials need or use with ceramic tile saw a diamond wheel dresser diamond pen to be trimmed , shovel frosted ... truncate wheel design calculations rather cumbersome , so often used in some of the approximate calculation produced a number of components such as camshafts , crankshafts, wheels , brake parts and support , can now be pressing or forging , grinding or high-speed and high-speed machining processes for finishing , which can significantly reduce the materials to the etal grinding wheel finished parts from the rough time , heat treatment technology is unreasonable or not cross the border, leading to At present many manufacturers of diamond saw blade matrix production levels and product quality is not high, the main reason. Copper or aluminum foil on the cylinder with a tip made of single crystal diamond grooving , and ultimately made nearly ideal cutting material in the field of super finishing applications .
Using new materials need or use with ceramic tile saw a diamond wheel dresser diamond pen to be trimmed , shovel frosted ... truncate wheel design calculations rather cumbersome , so often used in some of the approximate calculation produced a number of components such as camshafts , crankshafts, wheels , brake parts and support , can now be pressing or forging , grinding or high-speed and high-speed machining processes for finishing , which can significantly reduce the materials to the etal grinding wheel finished parts from the rough time , heat treatment technology is unreasonable or not cross the border, leading to At present many manufacturers of diamond saw blade matrix production levels and product quality is not high, the main reason. Copper or aluminum foil on the cylinder with a tip made of single crystal diamond grooving , and ultimately made nearly ideal cutting material in the field of super finishing applications .
2013年10月9日星期三
diamond segment describes the optical properties of
(1) flashing (Scintillation) is flashing diamond flash, that is, when the diamond or the light source, the diamond cup grinding wheel observer moves relative to the surface of the white light reflection and flash. Colorless, transparent, well-crystallized poly octahedral shaped diamond surface bodies or, if not Gache grinding can expose good flashing light.
(2) Identification of the optical intensity (Brilliance) because of the diamond has a very high reflectivity of the reflection critical angle is small, a wide range of total reflection, total reflection light is easily reflected light is large, resulting in high brightness.Depends concrete drill bits not only on the performance of the blade diamond, but on the diamond and the binder with the appropriate head of this composite material composed of the overall performance. For marble and other soft stone, head of the mechanical properties required is relatively low, the choice of copper-based binder. The sintering temperature is low but the copper-based binder, strength, low hardness, high toughness, low bonding strength with the diamond. When adding tungsten carbide (WC), the WC or W2C to as a skeleton metal, with the brick saw blades amount of cobalt in order to improve the strength
(3) Gloss (Luster) outstanding diamond-like hard, smooth and bright crystal face or cleavage face in white light reflection effect particularly strong, and this is very characteristic of the role of reflective called adamantine luster.
(4) the dispersion or the fire (Dispersion or fire) planes of diamond as diverse as prism, can through refraction, reflection and total reflection into the interior of the crystal composition of white light into white color - red, orange, yellow, green, blue, indigo, violet shade.
(2) Identification of the optical intensity (Brilliance) because of the diamond has a very high reflectivity of the reflection critical angle is small, a wide range of total reflection, total reflection light is easily reflected light is large, resulting in high brightness.Depends concrete drill bits not only on the performance of the blade diamond, but on the diamond and the binder with the appropriate head of this composite material composed of the overall performance. For marble and other soft stone, head of the mechanical properties required is relatively low, the choice of copper-based binder. The sintering temperature is low but the copper-based binder, strength, low hardness, high toughness, low bonding strength with the diamond. When adding tungsten carbide (WC), the WC or W2C to as a skeleton metal, with the brick saw blades amount of cobalt in order to improve the strength
(3) Gloss (Luster) outstanding diamond-like hard, smooth and bright crystal face or cleavage face in white light reflection effect particularly strong, and this is very characteristic of the role of reflective called adamantine luster.
(4) the dispersion or the fire (Dispersion or fire) planes of diamond as diverse as prism, can through refraction, reflection and total reflection into the interior of the crystal composition of white light into white color - red, orange, yellow, green, blue, indigo, violet shade.
ceramic diamond grinding disc
Grinding Taocifaxin special - Ceramic diamond honing plate Introduction
Currently Taocifaxin from the material divided silicon carbide, alumina ceramics and zirconia ceramics, etc., divided by hermetic sealing requirements, watertight, oil-tight, and its multi-use cast iron grinding disc plus abrasive or grinding paste. Although its polished concrete core bits quality to achieve customer requirements, but the drawback is as follows:
1 polishing efficiency is low
2 dirty work environment
3 parts must be cleaned after polishing
Four would not participate in polished and entirely effortless milling loss
W40 original cast iron disc using diamond powder removal 0.4-0.5mm, the grinding time of 30 minutes or so.
Original cast iron disc using 0.01-0.02mm diamond grinding paste polishing, margin 2-3 silk polishing time 40-50 minutes / plate.
A ceramic bond diamond honing plate Products
I am using the ceramic binder mixed with abrasive tools fine diamond abrasives, pressing, high temperature firing paste hexagonal flake cast iron plate,
Coarse grinding using diamond powder, polishing high-precision ultra-fine, ultra-fine powders.
Second, the benefits
1, the grinding efficiency is several times grinding, polishing grinding efficiency several times;
2, the polishing process requires only clean water can be added to rust, which is collected and filtered water can stone polishing pads be used repeatedly to achieve its clean processing, after processing the workpiece without cleaning, the workers operating environment is good;
3, product quality and geometry consistency;
4, cast iron disk can be used repeatedly;
5, grinding comprehensive low cost.
Currently Taocifaxin from the material divided silicon carbide, alumina ceramics and zirconia ceramics, etc., divided by hermetic sealing requirements, watertight, oil-tight, and its multi-use cast iron grinding disc plus abrasive or grinding paste. Although its polished concrete core bits quality to achieve customer requirements, but the drawback is as follows:
1 polishing efficiency is low
2 dirty work environment
3 parts must be cleaned after polishing
Four would not participate in polished and entirely effortless milling loss
W40 original cast iron disc using diamond powder removal 0.4-0.5mm, the grinding time of 30 minutes or so.
Original cast iron disc using 0.01-0.02mm diamond grinding paste polishing, margin 2-3 silk polishing time 40-50 minutes / plate.
A ceramic bond diamond honing plate Products
I am using the ceramic binder mixed with abrasive tools fine diamond abrasives, pressing, high temperature firing paste hexagonal flake cast iron plate,
Coarse grinding using diamond powder, polishing high-precision ultra-fine, ultra-fine powders.
Second, the benefits
1, the grinding efficiency is several times grinding, polishing grinding efficiency several times;
2, the polishing process requires only clean water can be added to rust, which is collected and filtered water can stone polishing pads be used repeatedly to achieve its clean processing, after processing the workpiece without cleaning, the workers operating environment is good;
3, product quality and geometry consistency;
4, cast iron disk can be used repeatedly;
5, grinding comprehensive low cost.
2013年10月8日星期二
great potential diamond coated tools
Diamond from carbon atoms, in a unique arrangement of the crystal orientation, so as to possess unique physical hss drill bits properties. 9,000 to 10,000 Vickers hardness, the hardness is almost non-crystalline diamond crystals DLC coating (DLC) twice.Non-crystalline diamond or DLC coating said, is the physical vapor deposition (PVD) process of coating a carbon thin film. These films are coated with chemical vapor deposition process over the thin diamond film.They do not have crystal structure, life is generally CVD diamond coated tools 10-15%The tool coated with a metal sintered polycrystalline diamond (PCD) forming a diamond tip is different crystal CVD diamond coatings can make the entire surface of the tool (including those with complex geometry concrete vibrator of the tool included) protected by the superhard material. Such unique geometry can be coated with the chemical vapor deposition of diamond-coated tools with polycrystalline diamond tools more significant than the advantages, making the latter's grinding cost is very high.With metal - nitride PVD coatings, such as titanium aluminum nitride (TiAlN), the micro-hardness of diamond crystals only 1/3.CVD diamond coated drill bits with polycrystalline diamond tip drill bit has the following benefits compared to the carbon fiber drilling application has been fully demonstrated, and the hole diamond wire saw costs reduced by 70% or more. Chemical vapor deposition of multilayer diamond drill burrs and delamination occurs before the composite material can be processed through holes 300 and PCD tip drill but can only process 150 through hole.Crystal diamond on a hot filament chemical vapor deposition process to form, this process time of 20-40 hours. The temperature employed in the process of 1,500 ° F (815.5 ℃) can be prevented unless something other than carbide coated, and the precise pretreatment process requires the use of a cemented carbide 6% level to achieve the best adhesion.Without pretreatment, diamond and carburized almost no chemical bond between the cemented carbide. However, roughly diamond carbide can be embedded in the surface of cemented carbide and diamond by the action of the mechanical interlocking adhered to the surface.
affect the life of the main factors diamond saw what
Impact efficiency and life of saw blade sawing factors are process parameters and the diamond particle size, density, hardness and other binders. It has cut the number of blades can be wire-speed, concentration Plate Compactor and cutting feedrate.One, cutting parameters(1) blade speed: In practice, the line speed diamond saw blades by equipment conditions, saw the quality and the nature of the restrictions before sawing stone. From the optimum blade life and cutting efficiency, it should be selected depending on the nature of the stone saw blade speed. Sawing granite, the blade speed at 25m ~ 35m / s within the selected range. For high quartz content and tile cutting blades difficult cutting granite, remove the blade speed limit is appropriate. Granite tiles in the production, the use of smaller diameter diamond saw blade, the line speed can reach 35m / s.(2) Cutting Depth: diamond cutting depth is related to wear, effective cutting, saw cutting force conditions and the nature of the important parameters of stone. Generally speaking, when the circular blades line speed diamond saw blade is high, should be selected for cutting of small depth, from the current technology, the cutting depth of the diamond can choose between 1mm ~ 10mm. Usually with a large diameter saw blade cutting granite blocks, the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time. When the line speed diamond saw blade is large, a large cutting depth should be selected. But in performance and tool strength saw the extent permitted, should try to take a greater depth of cut for cutting to improve cutting efficiency. When the machined surface when requested, should be used small depth of cut.(3) Feed speed: Cutting feedrate incurs stone feed rate. Its size sawing rate impact, the force and the cutting blade heat dissipation area. Its value should be based on the nature of the selected cutting stone.
2013年10月7日星期一
Wear alloy saw major factor
A phase change alloy blades wear friction in certain high-speed cutting process, substrate or material at temperatures above the phase transition temperature , makes the alloy saw blade with accelerated wear , and thus lose cutting ability . Such as high speed steels 500-600 °, ordinary masonry drill
bits steel 100 °, alloy steels 300-350 °, 65 manganese steel 200 ° temperature inside will result in the matrix phase transitions.
2 , the alloy microstructure in the welding temperature or other factors in the destruction of high -density ultra- fine particles in the welding alloy cold and hot temperatures , or high temperature , resulting in thicker alloy crystal , alloy cracking, deformation of the matrix alloy strength reduction and abrasion resistance .
3 , tool wear, cutting angle design and material discrepancies due to different hardness and various types of plastic stone drill bits materials not targeted under the appropriate choice of alloy , and no matter according to the hardness of the cutting dry cutting angle of each side effect which reduces tool life .
4 , the oxidation of the alloy blade wear oxidation wear at 800 ° C or higher friction temperature, oxygen in the air and alloys of cobalt , tungsten carbide, titanium, tool wear due to oxidation occurs .
5, the impact of technology and precision grinding wear, alloy circular saw blades are precision cutting tools, any main and sub- edge blade with tape, face cutting straight face , or radial cutting rather than a cutting line, each one formed alloy cutting point or depth , and many other factors that reduce their effectiveness .
6 , diffusion wear diffusion is cutting discs a chemical wear, diffusion wear is at a high cutting tool and the workpiece between the mutual diffusion of alloying elements , the tool material physical and mechanical properties of reduced lead increased tool wear . Carbide, titanium carbide increased in the tantalum carbide or other additives can be added to improve the matrix alloy and the temperature of diffusion and thus improve tool wear resistance and heat resistance.
7 , adhesive wear in the cutting of plastic material , the cutting and the rake face after the cutting work viscosity, the tool surface or partially lower strength adhesive particles or the workpiece to be cut so that the tool with grinding brush wear.
8 , improper maintenance or improper operation caused by wear and tear , each cutting equipment, cutting feed rate is not the same , while the alloy saw blade is designed according to different cutting material various angles , with inappropriate will reduce its effectiveness.
2 , the alloy microstructure in the welding temperature or other factors in the destruction of high -density ultra- fine particles in the welding alloy cold and hot temperatures , or high temperature , resulting in thicker alloy crystal , alloy cracking, deformation of the matrix alloy strength reduction and abrasion resistance .
3 , tool wear, cutting angle design and material discrepancies due to different hardness and various types of plastic stone drill bits materials not targeted under the appropriate choice of alloy , and no matter according to the hardness of the cutting dry cutting angle of each side effect which reduces tool life .
4 , the oxidation of the alloy blade wear oxidation wear at 800 ° C or higher friction temperature, oxygen in the air and alloys of cobalt , tungsten carbide, titanium, tool wear due to oxidation occurs .
5, the impact of technology and precision grinding wear, alloy circular saw blades are precision cutting tools, any main and sub- edge blade with tape, face cutting straight face , or radial cutting rather than a cutting line, each one formed alloy cutting point or depth , and many other factors that reduce their effectiveness .
6 , diffusion wear diffusion is cutting discs a chemical wear, diffusion wear is at a high cutting tool and the workpiece between the mutual diffusion of alloying elements , the tool material physical and mechanical properties of reduced lead increased tool wear . Carbide, titanium carbide increased in the tantalum carbide or other additives can be added to improve the matrix alloy and the temperature of diffusion and thus improve tool wear resistance and heat resistance.
7 , adhesive wear in the cutting of plastic material , the cutting and the rake face after the cutting work viscosity, the tool surface or partially lower strength adhesive particles or the workpiece to be cut so that the tool with grinding brush wear.
8 , improper maintenance or improper operation caused by wear and tear , each cutting equipment, cutting feed rate is not the same , while the alloy saw blade is designed according to different cutting material various angles , with inappropriate will reduce its effectiveness.
Appropriate choice alloy blades
Alloy Saw best material w6mo5cr4v2 tungsten and molybdenum high speed steel blade constructed with carbide Miaoxiao evenly distributed , high wear resistance , toughness, and thermoplastic , high-end abrasive grinding
wheels series of cost-effective benefits . Saw blade selection tungsten tungsten alloy head saw blade containing the type of substrate material , diameter, number of teeth, thickness , profile , angle , diameter and other parameters, which decision processing capacity of the saw blade and cutting performance . Select the saw blade when cutting materials according to the type , thickness, cutting speed , cutting the underlying purpose , feed speed , kerf width requires the correct selection of blades. Selected as the primary material when blade is made of tungsten steel composition , it is also known as tungsten hacksaw . Carbide saw blade containing the type of alloy , the colde saw
blade substrate material , diameter, number of teeth, thickness , profile , angle , diameter and other parameters, which decision processing capacity of the saw blade and cutting performance.
Alloy saw blade with which it produced via high-precision quenching, the hardness of up to 64 ~ 66hrc, very close to the high-performance alloy saw blade , bending strength of 4700mpa, toughness concrete saws and thermoplastic than w18cr4v by 50%.
Material alloy saw blade wear resistance, heat resistance, toughness and other aspects of performance are good, the price performance ratio, by Fanbo user reception.
Grindability , versatility , mature technology, high-speed steel is the most lasting one.
High performance alloy saw ? HSS through the process of changing the chemical composition it has a better hardness and thermal alloy blade cutter before technical requirements should not have cracks, sharp cutting edge , no chipping , blunt and annealing , etc. affect its function error fallacy.
Alloy saw blade with which it produced via high-precision quenching, the hardness of up to 64 ~ 66hrc, very close to the high-performance alloy saw blade , bending strength of 4700mpa, toughness concrete saws and thermoplastic than w18cr4v by 50%.
Material alloy saw blade wear resistance, heat resistance, toughness and other aspects of performance are good, the price performance ratio, by Fanbo user reception.
Grindability , versatility , mature technology, high-speed steel is the most lasting one.
High performance alloy saw ? HSS through the process of changing the chemical composition it has a better hardness and thermal alloy blade cutter before technical requirements should not have cracks, sharp cutting edge , no chipping , blunt and annealing , etc. affect its function error fallacy.
订阅：
博文 (Atom)