Stamping press and die by the sheet, strip, pipe and profile exerting force to produce plastic deformation or separation, thus obtaining the desired shape and size (Stamping) forming processing method. Stamping and forging are both plastic processing (or pressure processing), collectively referred to as forging. Stamping billets are mainly hot-rolled and cold-rolled steel plates and steel strips. Among the world's steel products, 60 to 70% are plates, most of which are finished by pressing. The car body, chassis, fuel tank, radiator plate, boiler drum, container shell, motor, electrical equipment, iron core, silicon steel sheet and so on are all stamping processing. Instruments and meters, household appliances, bicycles, office machinery, household utensils and other products, there are a large number of stamping parts.