It can be divided into four basic processes: punching (including punching, blanking, trimming, sectioning, etc.).
Bending: the stamping process of bending the sheet into a certain angle and shape along the bending curve.
Deep drawing: flat sheet metal is transformed into various open hollow parts or the shape and size of hollow parts are further changed.
Local forming: the stamping process (including flanging, bulging, leveling and shaping) in which various local deformations of different properties are used to change the shape of blank or stamping parts.