Experimental Investigation of Discharge Aided Grinding Dressing Method of Coarse-grained Diamond Wheels

The problems of difficult to control the morphology of abrasive grains on coarse-grained diamond grinding whccls were presented. A discharge aided grinding dressing technology was pro-posed to achieve the uniformity of abrasive grains on the cutting edges. The material removal mecha-nism of this hybrid dressing was systematically analyzed. The numerical modcls of pulse discharge heat transfer were established, and the thermal softening depth of diamond was used as the grinding depth, which was condueive to the advantages of the hybrid dressing method. The influences of machine tool kinematic Parameters (such as the speed of the grinding wheel, the speed of the tool wheel, the feed speed, and the grinding depth) on the grinding wheel dressing aecuraey and the loss depth of tool wheel in the discharge aided grinding dressing method were investigated, and the processing Parameters were optimized to achieve high efficiency and precision dressing of coarse-grained grinding wheels. The profile error PV valuc of the diamond grinding wheels with a grain size of 180 # is as 11.97 jum. The inspection results of the surface morphology of the dressing wheel indicate that discharge powered grinding may partially remove the abrasive particles, resulting in good homogeneity of the abrasive particles on the surfaces of the grinding wheel. The surface roughness of the ground Silicon carbidc ceramic workpiece reaches 412 nm, indicating that the dressing wheel has excellent grinding Performance. © 2024 Chinese Mechanical Engineering Society. All rights reserved.