Stamping process is a metal processing method, which is based on the plastic deformation of metal. It uses molds and stamping equipment to apply pressure to the sheet, so that the sheet is plastically deformed or separated. To obtain a certain shape, size, and function part, the normal materials in stamping production are metal materials (including ferrous metals and non-ferrous metals). Among of them, ferrous metals mainly include ordinary carbon structural steel, high-quality carbon structural steel, alloy structural steel, carbon Plain tool steel, stainless steel, electrical silicon steel, etc.