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Selection skills for stamping materials

Update:30-09-2019
Summary:

Stamping parts processing includes punching, bending, d […]

Stamping parts processing includes punching, bending, 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 sheets, galvanized sheets, tin-plated sheets, copper and copper alloy sheets, aluminum and aluminum alloy sheets.
Since the elastic discharge mold is easier to operate than the fixed discharge mold, the operator can see the feeding action of the strip in the mold, and the elastic discharge force is applied to the strip when the elastic discharge plate is unloaded, and the surface of the workpiece is not damaged. Therefore, in the actual design, the elastic discharge plate is used as much as possible, and only when the discharge force of the elastic discharge plate is insufficient, the fixed discharge plate is used. Whether the die used for the stamping part is a spring-loaded discharge plate or a fixed discharge plate depends on the discharge force, and the material thickness is the main consideration.
The main purpose of the hardness testing of stamping materials is to determine whether the degree of annealing of the purchased metal sheets is suitable for the subsequent stamping parts processing. Different types of stamping parts processing processes require sheets of different hardness levels. The aluminum alloy plate used for stamping processing can be tested by a Vickers hardness tester. When the material thickness is greater than 13 mm, the Barcol hardness tester can be used. The pure aluminum plate or the low hardness aluminum alloy plate should be a Barcol hardness tester.

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