1. The materials used for metal stamping parts should not only meet the technical requirements of product design, but also meet the requirements of stamping process and post-stamping processing (such as cutting, electroplating, welding, etc.).

2. When designing the structural shape of parts for metal stamping parts, it is best to use simple and reasonable surfaces (such as plane, cylindrical surface and helicoid) and their combinations, and at the same time, try to minimize the number of processing surfaces and the processing area.

3. Choose a reasonable method of blank preparation in mechanical manufacturing, which can directly use profiles, casting, forging, stamping and welding. The selection of blank is related to the specific production technical conditions, and generally depends on the production batch, material properties and processing possibilities.

4. Requirements for the formability of metal stamping. For the forming process, in order to facilitate stamping deformation and improve the quality of parts, the material should have good plasticity, small yield ratio, large directional coefficient of plate thickness, small directional coefficient of plate plane and small ratio of yield strength to elastic modulus. For the separation process, it is not necessary for the material to have good plasticity, but it should have certain plasticity. The better the plasticity, the more difficult it is to separate.

5, the provisions of the appropriate manufacturing accuracy and surface roughness parts processing costs. The processing cost of metal stamping parts will increase with the improvement of precision, especially in the case of high precision, which is extremely significant. Therefore, high accuracy should not be pursued when there is no sufficient basis. In the same way, the surface roughness of metal stamping parts should also be properly specified according to the actual needs of the matching surface. The processing technology of metal stamping parts is complicated. In order to ensure that the performance of metal stamping parts can meet the use requirements, it is necessary to follow the corresponding technological requirements to ensure the feasibility of production.

Technical requirements of metal stamping parts

1. Chemical analysis and metallographic examination

Analyze the content of chemical elements in the material, judge the grain size level and uniformity of the material, evaluate the levels of free cementite, banded structure and non-metallic inclusions in the material, and check the defects such as shrinkage cavity and porosity of the material.

2, material inspection

The processing materials of stamping parts are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, and the raw materials of metal stamping parts should have quality certificates, which ensure that the materials meet the specified technical requirements. When there is no quality certificate or for other reasons, the metal stamping parts manufacturer can select raw materials for reinspection as needed.

3, formability test

Bending test and cupping test are carried out on the material, and the work hardening index n value and plastic strain ratio r value of the material are determined. In addition, the test method of steel sheet formability can be carried out according to the provisions of sheet steel formability and test method.

4. Hardness detection

Rockwell hardness tester is used to detect the hardness of metal stamping parts. Small-sized stamping parts with complex shapes can be used for testing, and the plane is too small to be tested on an ordinary table-top Rockwell hardness tester.

The above is what I want to share with you, and I hope it will help you.