The grinding process of diamond powder can be regarded as the micro-cutting of the workpiece by the free abrasive through the grinding tool. It has a complex physical and chemical integrated effect. Its main functions are as follows:

1. Diamond powder cutting effect. Because the material of the abrasive tool is softer than the material of the workpiece to be polished, the abrasive particles in the abrasive are embedded in the surface of the abrasive tool or float, thereby forming the bottom of the blade. Next, micro-cut the surface of the workpiece.

2. Diamond powder chemical action. When using chromium oxide, stearic acid or other abrasives, a very thin oxide film will be formed on the surface of the workpiece. The oxide film layer is easy to wear, and continuously and quickly oxidize the film during the grinding process. After forming, it will continue to wear, thereby speeding up the grinding process and reducing the surface roughness.

3. Plastic deformation of diamond powder, passivation of abrasive particles on the surface of the workpiece, deformation of the processed material, ironing of peaks and valleys on the surface of the workpiece during plastic deformation or hardening of the workpiece during repeated deformation, and finally rupture to form a miniature night. When grinding, the following requirements should be met: the surface shape accuracy of the grinding tool should be high, the workpiece should perform complex compound movements, and the abrasive must be suitable.