Stamping is a kind of production technology that can make the sheet metal be directly deformed and deformed in the die by the power of conventional or special stamping equipment, so as to obtain a certain shape, size and performance of product parts. Sheet metal, mold and equipment are the three elements of stamping process. According to the stamping temperature, it can be divided into hot stamping and cold stamping. The former is suitable for sheet metal processing with high deformation resistance and poor plasticity, while the latter is carried out at room temperature, which is a common stamping method for sheet metal. It is one of the main methods of metal plastic processing (or pressure processing), also belongs to the material forming engineering technology.