2013年11月21日星期四

etermine the characteristics of the grinding wheel grinding process system can make even micro cutting

 Grinder with grinding wheel as the cutting tool on the workpiece machining methods. This method features:
 (1) Since the abrasive grinding wheel itself wet polishing pad  has a high hardness and heat resistance, high hardness can be processed so grinding materials such as hardened steel, carbide, etc..
 (2) determine the characteristics of the grinding wheel grinding process system can make 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 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  diamomd core drill bits infeed grinding to remove the error.(5) After blunt abrasive, grinding force also increased, resulting in grain crushing or off, exposing sharp edges again, this feature is called "self-sharpening." Self-sharpening grinding a certain period of time to make normal, but after more than a certain work should be carried out manually trimmed to avoid grinding force increases caused by vibration, noise and damage the workpiece surface quality.Wheel speed working conditions, in order to ensure safety, should be checked before installation, there should be no cracks and other defects; wheel work to make a smooth, dynamic balance test should be carried out before use.Grinding work after a certain time, its surface will be void debris clogging the abrasive concrete saw blades  acute angle will blunt the original geometry is distorted. Therefore, to restore the cutting ability of the dressing to be correct geometry. Wheel dresser diamond pen required.Structure and surface grinder grinding motionMany different types of grinding machines, mainly surface grinder, cylindrical grinder, internal grinder, universal cylindrical grinding machine (also can grind the hole), gear grinding, thread grinding machine, rail grinding, centerless grinding (grinding cylindrical) tool grinder (grinding tool ), etc.

没有评论:

发表评论