Stamping process is through the use of conventional or special stamping equipment, the driving force, so that sheet in the mold directly affected by the deformation force and deformation, and thus obtain a certain shape, size and performance of the product parts production technology. Sheet metal, tooling and equipment are the three elements of stamping process. metal stamping process is a process of cold deformation. So, is called cold stamping or sheet metal stamping, or stamping. It is a metal processing (or pressure processing), one of the main method, but also forming part of engineering materials.