What are the selection techniques for stamping materials? Today, European and Chinese automotive molds will tell you
Stamping processing includes processes such as punching, bending, deep drawing, forming, and finishing. The materials used for stamping processing are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal sheet and strip materials, such as carbon steel plate, galvanized plate, tinplate, copper and copper alloy plate, aluminum and aluminum alloy plate, etc.
Due to the fact that the operation of the spring-loaded unloading mold is more convenient than that of a fixed unloading mold, the operator can see the feeding action of the strip in the mold, and the spring-loaded unloading plate applies a flexible force to the strip during unloading, which will not damage the surface of the workpiece. Therefore, in actual design, it is recommended to use a spring-loaded unloading plate as much as possible, and only when the unloading force of the spring-loaded unloading plate is insufficient, a fixed unloading plate is used instead. Whether the mold used for stamping parts adopts a spring-loaded discharge plate or a fixed discharge plate depends on the size of the discharge force, with material thickness being the main consideration factor.
The main purpose of hardness testing for stamping materials is to determine whether the annealing degree of the purchased metal sheet is suitable for the subsequent stamping processing. Different types of stamping processing processes require different hardness levels of sheets. Aluminum alloy plates used for stamping parts can be tested using a Vickers hardness tester. When the material thickness is greater than 13mm, a Babbitt hardness tester can be used. Pure aluminum plates or low hardness aluminum alloy plates should use a Babbitt hardness tester.