Stamping processing includes punching, bending, deep drawing, forming, finishing and other processes. The materials processed by stamping parts are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plates, galvanized steel plates, tinned plates, copper and copper alloy plates, aluminum and aluminum alloy plates, etc.
Since the operation of the elastic unloading mold is more convenient than the fixed unloading mold, the operator can see the feeding action of the strip in the mold, and the elastic unloading plate exerts a flexible force on the strip when unloading, and will not damage the surface of the workpiece Therefore, in the actual design, the elastic unloading plate is used as much as possible, and the fixed unloading plate is used only when the unloading force of the elastic unloading plate is insufficient. Whether the die used for stamping parts adopts an elastic discharge plate or a fixed discharge plate depends on the size of the discharge force, and the material thickness is the main consideration.
The main purpose of the hardness test of stamping parts is to determine whether the annealing degree of the purchased metal sheets is suitable for the subsequent stamping parts processing. Different types of stamping parts processing techniques require plates of different hardness levels. The aluminum alloy plate used for stamping parts can be tested with a Webster hardness tester. When the material thickness is greater than 13mm, the Barcol hardness tester can be used. The pure aluminum plate or the low hardness aluminum alloy plate should use the Barcol hardness tester.