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
Abrasive Tools
2013年10月24日星期四
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.
订阅：
博文 (Atom)