Reasonable selection and dressing grinding wheel, using white corundum grinding wheel is better, it is the performance of hard and brittle, and easy to produce the new cutting edge, so the cutting force is small, the grinding heat is small, easy pull cover punch phone, use medium granularity on granularity, such as 46 ~ 60 mesh is better, on the grinding wheel hardness by using soft and soft (ZR1, ZR2 and R1, R2), namely, coarse granularity, low hardness of the grinding wheel, good self excitation can reduce heat cutting.

Of selecting the appropriate fine grinding wheel is very important, for easy pull cover mold steel high vanadium molybdenum condition, selection of GD is suitable for single crystal corundum grinding wheel, when processing hard alloy, high quenching hardness of materials, the priority of using organic binder diamond grinding wheel, the organic binder grinding wheel grinding, grinding the workpiece roughness of Ra0.2 mu m, in recent years, with the application of new materials, CBN (cubic boron nitride) grinding wheel shows very good processing effect, zhongshan easy pull cover punch, both inside and outside the CNC forming grinder, jig grinding machine, CNC grinding machine on the finish machining, grinding wheel is better than other species.

In grinding, attention should be paid to timely dressing the grinding wheel to keep the sharp wheel. When the grinding wheel is passivated, it will slip and squeeze on the surface of the workpiece, causing the surface of the workpiece and reducing its strength.