What kinds of stamping process can be divided into at present?

2020-12-08 16:37:31

The stamping process can be divided into separation process and forming process (including bending, drawing and forming). The separation process is to separate the stamping part and the blank along a certain contour line in the stamping process, at the same time, the quality of the separation section of the automobile stamping part must meet certain requirements; the forming process is to make the stamping blank plastic deformation under the condition of no damage, and transform it into the required finished product shape, and also meet the requirements of dimensional tolerance and other aspects.

According to the stamping temperature, there are cold stamping and hot stamping. This depends on the strength, plasticity, thickness, deformation degree and equipment capacity of the material, and the original heat treatment state and final service condition of the material should be considered.

The processing of cold stamping metal at room temperature is generally suitable for blank with thickness less than 4mm. It has the advantages of no heating, no oxide skin, good surface quality, convenient operation and low cost. The disadvantage is that there is work hardening phenomenon, which makes the metal lose further deformation ability. Cold stamping requires that the thickness of the blank is uniform and the fluctuation range is small, and the surface is smooth, without spots and scratches.

Hot stamping a stamping process in which metal is heated to a certain temperature range. It has the advantages of eliminating internal stress, avoiding work hardening, increasing material plasticity, reducing deformation resistance and reducing power consumption of equipment.

Die structure: die is a tool to separate or deform sheet metal. It is composed of upper module and lower module. The handle of the upper die is fixed on the slide of the press and moves up and down with the slider, while the lower die is fixed on the working table of the press.

The punch and die are the parts of the die that deform or separate the blank. They are fixed on the upper template and the lower template respectively by pressing plate. The upper and lower templates are respectively equipped with guide sleeve and guide pillar to guide the alignment of punch and die. The guide plate and positioning pin are used to control the feeding direction and length of the blank respectively. The function of the discharge plate is to make the workpiece or blank out of the punch after stamping.

Die is an essential die in stamping production. There are three kinds of stamping dies: simple die, continuous die and compound die.