A molding method of applying external force to plates, strips, pipes and profiles. Plastic deformation or separation is carried out by a press and a die, so that workpieces (stamping parts) with required shapes and sizes can be obtained. Stamping and forging belong to plastic processing (or pressure processing) and are collectively called forging. Stamping blanks are mainly hot-rolled and cold-rolled steel plates and strips. 60 ~ 70% of the world's steel products are plates, and most of them are made into finished products by stamping. Automobile body, chassis, fuel tank, radiator, boiler drum, container shell, motor and electrical appliances are all stamped with iron core silicon steel sheets. Instruments, household appliances, bicycles, office machinery, household utensils and other products, there are also a large number of stamping parts.