The metal stamping process can be roughly divided into two categories: separation process and forming process (also divided into bending, deep drawing, and forming). The separation process is to separate the stamping part and the blank from each other along a certain contour line during the stamping process, and the quality of the separation section of the stamping part must also meet certain requirements;

Metal stamping is a kind of processing method with high production efficiency, less material loss and low processing cost. Mass production of parts is easy to realize mechanization and automation, has high precision, and is also convenient for post-processing of parts. In the production process of general metal stamping parts, there are the following four processing processes:

1. Punching: The punching process (including punching, blanking, trimming, cutting, etc.) to realize the separation of sheet metal.

2. Bending: a stamping process in which the sheet is bent into a certain angle and shape along the bending line.

3. Deep drawing: a stamping process that turns the flat sheet into various open hollow parts, or further changes the shape and size of the hollow parts.

4. Local forming: the stamping process (including flanging, bulging, leveling and shaping processes, etc.)