Three methods to reduce the defects in mould processing

First: reasonably use the cooling lubricating liquid, play the three functions of cooling, washing and lubrication, keep the cooling lubrication clean, so as to control the grinding heat within the allowable range, and prevent the workpiece from thermal deformation. To improve the cooling conditions of grinding, such as the use of immersion grinding wheel or internal cooling grinding wheel and other measures. By introducing cutting fluid into the center of grinding wheel, cutting fluid can directly enter the grinding area, play an effective cooling role, and prevent workpiece surface burn.

The second one is to select the grinding parameters reasonably, and adopt the fine grinding method with small radial feed or even fine grinding. If the radial feed and the speed of the grinding wheel are properly reduced and the axial feed is increased, the contact area between the grinding wheel and the workpiece is reduced, and the heat dissipation condition is improved, so as to effectively control the increase of the surface temperature.

The third is to select and trim the grinding wheel reasonably. The white corundum wheel is better. Its performance is hard and brittle, and it is easy to produce new cutting edges. Therefore, the cutting force is small, and the grinding heat is small. The medium grain size is used on the grain size, such as 46-60 mesh. The medium soft and soft (ZR1, Zr2 and R1, R2) are used on the hardness of the grinding wheel, that is, the coarse-grained and low hardness grinding wheel. The good self excitation can reduce the cutting heat 。