Generally, automobile dies can be classified according to the following main features:

1. Classification according to process properties

a. Blanking die: a die that separates materials along a closed or open contour. Such as blanking die, punching die, cutting die, cutting die, trimming die, cutting die, etc.

b. Bending die: the die that makes the blank or other blank produce bending deformation along the straight line (bending curve), so as to obtain the workpiece with a certain angle and shape.

c. Drawing die: a die that makes blank of sheet metal into open hollow part or further changes shape and size of hollow parts.

d. Forming die: it is a kind of die that directly copies the blank or semi-finished product according to the shape of punch and die, while the material itself only produces local plastic deformation. Such as bulging die, necking die, expanding die, relief forming die, flanging die, shaping die, etc.

2. Classification according to the degree of process combination

a. Single process Die: in one stroke of press, only one stamping process is completed.

b. Compound die: only one station, in a press stroke, in the same station at the same time to complete two or more stamping process of the mold.

c. Progressive die (also known as continuous die): in the direction of blank feeding, there are two or more stations. In the one stroke of press, the die with two or more stamping processes is completed at different stations one by one.

3. Classification according to the processing method of products

According to the different processing methods, the dies can be divided into five categories: punching and shearing dies, bending dies, drawing dies, forming dies and compression dies.

a. Punching and shearing die: the work is completed by shearing. The common forms include cutting die, blanking die, punching die, trimming die, trimming die, trimming die, broaching die and punching die.

b. Bending die: it is to bend the flat embryo into an angle shape. Depending on the shape, accuracy and production capacity of the parts, there are many different forms of dies, such as ordinary bending die, cam bending die, crimping die, arc bending die, bending and sewing die and twisting die.

c. Drawing die: drawing die is to make the flat rough embryo into a bottomed seamless container.

d. Forming die: it refers to various local deformation methods to change the shape of the hair embryo. Its forms include bulging forming die, crimping forming die, necking forming die, hole flange forming die and round edge forming die.

e. Compression die: it is the use of strong pressure to make the metal embryo flow deformation and become the required shape. Its types include extrusion die, embossing die, embossing die and end pressing die.