Question from a netizen in the 291st live broadcast room: Teacher. I am currently working on a 1.2-thick aluminum plated plate that does not require punching. It is made of M35 material for the punch and has a DC53 lower die.
Many stamping professionals believe that the burrs on the product are due to insufficient wear resistance and low hardness of the mold. However, in reality, increasing hardness is useless as the product is still prone to peeling. This is an error in determining the cause of failure, resulting in incorrect material selection.
Punching a 1.2-thick aluminum plate, the aluminum material is very soft and should not wear out so quickly. Moreover, his punch has already used M35 high-speed steel containing 5.0% cobalt, with a hardness of 63-65HRC, and DC53 for the lower mold, with a hardness of 60-62HRC. This material combination has good wear resistance, but it is still not punched, which is prone to burrs, indicating that the material selection is wrong.
Punching a 1.2-thick aluminum plated plate, the material is very soft, and the tool steel does not need such high hardness. The key is that the punch does not stick to aluminum shavings, and the product will not produce burrs. This is the key to material selection.
Mr. Qi from Shenzhen has stamped 2mm thick aluminum plates and used 8566 die steel for the punch. He has made tens of millions of products without any wear and tear. From last year to this year, the punch has not been completely polished. The tool steel has been chosen correctly. When stamping aluminum plates, the punch is very resistant to impact.
The netizen said that the 1.2-thick aluminum plated plate that was punched does not need to be punched, and it is fuzzy and prickly. The punch is made of M35 material and the lower mold is DC53. In fact, as long as he replaces the punch with 8566 die steel, the product will not have any burrs or spikes, and he can keep punching without any problems.
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