According to the nature of the process: a. Punching die: along the closed or open outline of the material to produce separation of the die. Such as blanking die, punching die, cutting die, incision die, cutting die, cutting die, etc. b. Bending die: Die that causes blank or other blank to bend and deform along a straight line (bending line) to obtain a workpiece of a certain Angle and shape. c. Deep drawing die: It is a die for making blank sheet metal into open hollow parts, or making hollow parts further change shape and size.

The main component of the automobile die is the covering die. This kind of mold is mainly cold die. In a broad sense, "automobile mold" is a general term for the manufacture of all parts of the automobile mold. For example, stamping mold, injection mold, forging mold, casting wax mold, glass mold and so on.

Special-shaped spring manufacturers are due to the small process content, small curved cheek, particularly complex workpiece, but also need shape forming. Therefore, it is necessary to form the molded core and forming surface, and the forming conditions of the mold structure are very large.

Sheet metal processing and sheet metal are two essential industries in our life. Almost all metal manufacturing industries will use sheet metal processing. Automotive sheet metal parts also have a high appearance rate in the manufacturers of mechanical equipment. It has not only brought huge economic benefits to our enterprises, but also brought convenience to the production and life of our residents.