Stamping relies on the pressing machine and die to release the external force on the plate, amorphous strip, pipeline and materials, so that the shape changes or separated out, so as to get the shape specifications of the product workpiece (stamping parts) forming processing. Stamping and calcination are plastic processing (or working pressure processing), collectively known as casting. The stamping materials are mainly hot - rolled and cold - rolled stainless steel plates and steel chains. Stamping processing is a production process of commodity parts with certain appearance, size and performance by relying on the driving force of basic or special stamping machine, so that the plate suffers deformation force in the mold at the same time and then transforms.