What are the process characteristics of precision machining?

The main process features are small cutting depth (generally micron level), minimal tool wear, and the use of diamond tools in order to achieve mirror-level processing surfaces. The surface quality of the processed surface is mainly used as the processing evaluation parameter, and the dimensional accuracy of the parts is not a key factor. As the technical level of the processing industry continues to improve, the surface quality and processing accuracy that can be achieved by precision machining are constantly shrinking and changing values, and are closely related to the technical level of the country and industry. In China, the minimum cutting thickness in the military and scientific research industries is already below the micron level, and the surface quality is around 20 nanometers.