In our daily life, metal stamping parts are everywhere. In order to improve customer production efficiency and quality, we continuously introduce advanced foreign technology and products. What aspects of the quality of metal stamping parts are reflected in? Analyze from the following points
1. Chemical analysis, metallographic examination
Analyze the content of chemical elements in the material, determine the grain size level and uniformity of the material, evaluate the level of free carbides, banded structures, and non-metallic inclusions in the material, and inspect defects such as shrinkage and porosity.
2. Material inspection
The materials used for stamping parts processing are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal sheet and strip materials. The raw materials for metal stamping parts should have quality certificates to ensure that the materials meet the specified technical requirements. When there is no quality certificate or for other reasons, the metal stamping parts production factory can choose raw materials for re inspection as needed.
3. Forming performance test
Perform bending tests and cupping tests on the material to determine its work hardening index n value and plastic strain ratio r. In addition, regarding the testing method for steel plate formability, it can be carried out according to the regulations for thin steel plate formability and testing methods.
4. Hardness testing
The hardness testing of metal stamping parts adopts Rockwell hardness tester. Small and complex shaped stamped parts can be used to test surfaces that are too small to be tested on ordinary desktop Rockwell hardness testers.
5. Determination of other performance requirements
Measurement of the electromagnetic properties of materials and their adhesion to coatings and coatings.
That's all for the technical requirements of processing metal stamping parts. Additionally, it should be noted that the accuracy and surface condition of hot metal stamping parts are lower than those of cold metal stamping parts, but still better than castings and forgings, with less cutting processing.
