Stamping is a forming processing method that relies on press and die to apply external force to plate, strip, pipe and profile to produce plastic deformation or separation, so as to obtain the required shape and size of the workpiece (stamping part). Stamping and forging are both plastic processing (or pressure processing), collectively known as forging. The pressed billets are mainly hot and cold rolled steel plates and steel strips. Of the world's steel, 60 to 70 percent is sheet metal, most of which is stamped into finished products. Automobile body, chassis, fuel tank, radiator, boiler drum, container shell, motor, electrical core silicon steel sheet, etc., are stamping processing. Instruments, household appliances, bicycles, office machinery, utensils and other products, there are also a large number of stamping parts.

The die used for stamping is called a stamping die, referred to as a punching die. A die is a special tool for batch processing materials (metal or non-metal) into the desired punch. The die is very important in stamping, without the die that meets the requirements, the mass stamping production is difficult to carry out; Without advanced dies, advanced stamping processes cannot be realized. Stamping process and die, stamping equipment and stamping materials constitute the three elements of stamping processing, and only they can be combined with each other to obtain stamping parts