Generally speaking, in the stamping line, steel plates with less than 4 pieces are considered as thin plates, and 5MM steel plates are fine for stamping, but the stamping accuracy will be low, but IT 14 can at least do it, even more so for making washers. When it comes to the service life of the die, it is nothing more than that the working part of the convex-concave die is easy to wear. If the dimensional accuracy and cross-section quality are not high, such as burr height, you can use large gap blanking, but the burr will be slightly higher, so it is not allowed to make gaskets. In this way, we can consider deburring manually after finished products or deburring with special equipment such as vibrating screen (this is more efficient, and if the gasket thickness is high, it can be shaped or leveled. This can be combined with the mold), which is very obvious for improving the service life of the mold. In addition, the surface smoothness of punch and die must be better than 0.8μm, which is the minimum requirement. The second scheme is to improve the material properties of punch and die. The minimum is Cr 12MoV, imported materials such as SKD 1 1 or DC53 can be used, and cemented carbide can also be considered. In addition, the working part of the punching head can be electroplated to improve the wear resistance. For punch and other parts, try to rely on standard design, so the procurement cost will be reduced a lot. Punch standard parts are recommended, which are used more here and have good quality.

The second is to consider the design of some structural parts, such as fixing, positioning and guiding. In the design of these parts, targeted consideration should be given. When these parts are finished, the lateral force on the working part will be much smaller, which reduces the probability of the punch breaking (the punch can be pushed open). In fact, there are others, so I won't talk about them here.