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Have you achieved the nine key points of aluminum alloy shell stamping

November 29, 2022

Aluminum alloy is widely used because of its light weight, good heat dissipation, easy processing and excellent corrosion resistance. The shells of many commodities are made of aluminum alloy, and most aluminum alloy shells are made of aluminum alloy plates by secondary processing. In mass production, aluminum alloy shells are mainly processed by stamping.

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The aluminum alloy shell is particularly vulnerable to crushing and scratching during stamping production. Therefore, the following nine points should be noted in the process of die making and stamping of aluminum alloy shell:
First, the aluminum alloy material is relatively soft, in order to prevent deformation and displacement of aluminum alloy during stamping. Precise positioning must be set on the stamping die, and the positioning device needs smooth surface without water chestnut. This can effectively reduce the defects caused by aluminum alloy shell stamping;


Second, reasonably design the die clearance to prevent the aluminum alloy shell from bulging and corner collapse;
Third, when designing the structure of aluminum alloy shell, try to avoid deep counterbore, because most of the post process of aluminum alloy shell requires anodic oxidation, and deep counterbore is easy to hide acid during anodic oxidation.

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Aluminum alloy shell
Fourth, all the cutting edges of the die shall be cut with the slow threading line, because the cutting edges of the die cut by the fast and middle threading lines are uneven, and the cutting edges of the aluminum alloy shell are prone to burrs and dog teeth when punching;
Fifth, when stamping the aluminum alloy shell, the aluminum alloy plate needs to be pasted with PE film. PE film can effectively reduce scratches and bruises;
Sixth, during the production process, keep the mold, stamping platform and transfer blister disk clean and free of impurities;


Aluminum alloy shell
Seventh, aluminum alloy is a good conductor of heat, which is easy to conduct heat and heat. Therefore, it is necessary to coat drawing oil on materials and molds frequently to cool down during stamping, which can also play a role in lubrication;
Eighth, during production, if the aluminum alloy shell has excessive burr or edge collapse, contact the mold department as soon as possible to repair the mold for production;
Ninth, when stamping the aluminum alloy shell, the operator shall tear off the PE film every 20-30 times to check whether the aluminum alloy shell has any stamping defects, such as die printing, crushing, scratching, bulge, corner collapse, curling, etc.