Stamping die is a kind of special technological equipment which processes materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping process, which is called cold stamping die (commonly known as cold stamping die). Stamping is a kind of pressure processing method, which uses the die installed on the press to exert pressure on the material at room temperature to make it produce separation or plastic deformation, so as to obtain the required parts.
There are many forms of stamping dies, and the stamping dies are classified according to the working nature, die structure and die material.
Classification according to process properties
a. A die that separates material along a closed or open contour. Such as blanking die, punching die, cutting die, cutting die, trimming die, cutting die, etc.
b. The bending die makes the blank or other blank along the straight line (bending curve) to produce bending deformation, so as to obtain a certain angle and shape of the workpiece mold.
c. Deep drawing die is a kind of die which can make the blank of sheet metal into open hollow parts, or make the hollow parts further change the shape and size.
d. The forming die is a kind of die which directly copies the blank or semi-finished workpiece according to the shape of the punch and die in the drawing, while the material itself only produces local plastic deformation. Such as bulging die, necking die, expanding die, undulating forming die, flanging die, shaping die, etc.
e. Riveting die is to use external force to make the parts join or lap together in a certain order and way, and then form a whole
Classification according to process combination degree
a. Single process die in a press stroke, only one stamping process of the die.
b. The compound die has only one station, and it can complete two or more stamping processes at the same station in one stroke of the press.
c. Progressive die (also known as continuous die) has two or more positions in the feeding direction of the blank. In one stroke of the press, two or more stamping processes are completed in different positions.
d. The transfer die integrates the characteristics of single process die and progressive die. By using the manipulator transfer system, the product can be quickly transferred in the mold. It can greatly improve the production efficiency of the product, reduce the production cost of the product, save the material cost, and the quality is stable and reliable.
Classification by product processing method
According to the different processing methods, the dies can be divided into five categories: punching and shearing die, bending die, drawing die, forming die and compression die.
a. Punching and shearing die: the work is completed by shearing. The commonly used forms are shearing die, blanking die, punching die, trimming die, trimming die, trimming die, punching 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, curling die, arc bending die, bending punching die and twisting die, etc.
c. Drawing mould: drawing mould is to make the flat rough embryo into seamless container with bottom.
d. Forming die: refers to the use of a variety of local deformation methods to change the shape of the burr, its forms are convex forming die, crimping forming die, necking forming die, hole flange forming die and circular edge forming die.
e. Compression die: it is to use the strong pressure to make the metal rough embryo flow and deform into the required shape. Its types include extrusion die, embossing die, stamping die and end pressing die.
