How to solve the problem that the punching size of hardware stamping parts does not match?

2019-12-16 10:30:25

A large number of cold stamping processes have been used in the production of automotive stamping parts, which are suitable for the needs of many varieties and large-scale production of automotive stamping parts industry. In medium and heavy-duty vehicles, most of the covering parts, such as body outer panel, and some load-bearing and supporting parts, such as frame, carriage and other auto parts are automobile stamping parts. The steel used for cold stamping is mainly steel plate and steel strip, accounting for 72.6% of the total steel consumption of the whole vehicle. The relationship between cold stamping materials and the production of automobile stamping parts is very close. The quality of materials not only determines the performance of products, but also directly affects the process design of automobile stamping parts process, and affects the quality, cost, service life and production organization of products. Therefore, reasonable selection of materials is one of the most important factors An important and complex task.

In the production process of metal stamping parts, we will encounter the situation that the punch size is too large or too small, and the difference between punch size and punch size is large. In order to solve this kind of problem, we should consider not only the planning size, processing accuracy and blanking clearance of forming punch and die, but also the following aspects.

1. In the production of hardware stamping parts, the rough edge of stamping parts produced during blanking should be studied and the blanking gap should be checked to see if it is reasonable. It is mainly aimed at U-bend and V-bend. The key to solve the problem is to guide the stamping parts before bending, during bending, and to press the material to prevent the stamping parts from sliding during bending.

2. In the production of metal stamping parts, the tensile stress of materials increases, and the tendency of turning over and twisting of stamping parts increases. When turning over occurs, the punching size tends to be smaller. The strong pressure on the material causes plastic deformation of the material, which will lead to the increase of punching size. When the pressure is reduced, the punching size will be smaller.

3. In the production of metal stamping parts, if bevel or arc is built at the end, because the blanking force is relieved, the stamping parts are prone to turnover and defamation, so the punching size will be larger. The punch end is plane, and the punch size will be smaller.