Diamond wheel clogging type description

1 ) embedded clogging mechanism and attachment type
    Embedded and dependent type jams are clogging debris mechanically filling in gaps in diamond grinding wheel produced . Fill power from two aspects, one is external , one internal, related to the physical, electrical , thermal , etc. factors.
    External factors : grinding a very important feature , the radial component force Fy is larger than the tangential grinding force component Fz, Fy / Fz ≥ 2 ~ 10, the workpiece material more rigid plastic smaller , Fy / Fz ratio greater , grinding debris such areas are under strong pressure, is mechanically squeezed into the gap between the wheel surface . From  abrasive fibre disc the microscopic analysis of debris along the front of the slide abrasive , abrasive in front of the local area with several layers of debris piled in the back of abrasive due to the role of high-speed rotating grinding wheel , forming a vortex flow area, whirlpool area significantly reduced air pressure in the negative pressure , so that part of the debris attached to the back of the abrasive grains to form abrasive flank dependent clogging material is attached to the majority of ash and particles.
    Electrostatic field : the relative speed of the grinding wheel and the workpiece is much greater than V V sand workers, ordinary grinder V s = 3 ~ 50m / s, the speed of high-speed grinder grinding maturity value is 50 ~ 80 / s, foreign trials at speeds up to 1.5m / s or  Sanding Sheets less 200m / s ~ 250m / s, the speed of the workpiece . When the grinding wheel and the work of the relative motion , arranged according to certain rules of the charge in the grinding area, due to the grinding wheel and the workpiece surface electron escape will cause. Meanwhile , the grinding gas high temperature region will result in the shock due to the discharge , so that the neutral gas is ionized into positive ions and electrons. Some small areas in the grinding zone formed by a small electric field consists of the grinding wheel and the workpiece , the electric field , neutral atoms , positive ions, electrons , impurities, dust , not only the neutral atoms are ionized in the process , there are ion and electron recombination process. In the electric field , the polar part of the debris will be presented according to the principles of opposites attract , and the wheel opposite to the polarity of the debris is adsorbed on the surface of the grinding wheel . Since the electric field strength is small, so the adsorption force is weak, the wheel surface debris is not solid , but by means of mechanical pressure between the larger wheel and the workpiece, the wheel has been adsorbed on the surface of the wear debris can be stably embedded Wheel the gap between the surfaces . ( 2 ) blockage of the adhesion mechanism type :
   Most of the grinding process of grinding the input power into heat, so that the grinding temperature up to 1200K or more points , in such a high temperature, rapid grinding of the first case of air  Bonded abrasives oxidation , a low melting point metal oxide is formed , and then these metals oxide grinding zone was heated to high temperatures melt state , covering the surface of the wheel , when this part of the surface of the grinding wheel on participation once again in the role of the grinding force , and some pushed open , and some strengthening, increasing the affinity and adhesion with the wheel , and the adhered surface of the workpiece is pressed ridge groove surface . Through multiple stochastic grinding , many abrasive debris adhering four weeks , the grinding force increases, the temperature rises , thereby forming a vicious cycle of increased congestion, or the abrasive grain broken off, which is melt adhesive .