What is the reason why the concave die of cold stamping die always collapses? Is it related to the oversize blanking hole of the lower template?

1, it doesn't matter. The diameter of leakage hole is 125.

2. The thickness of female die is also relevant, preferably 30-40. Material thickness

The material thickness is greater than 0.8- 1.5, and the female die thickness is 25.

Material thickness > 1.5-3 female die thickness is 28,

Material thickness > 3-5 The thickness of the negative mold is 32,

3. It is also related to the distance from the edge of the die hole to the edge of the lower die.

Material thickness > 0.8- 1.5 The minimum distance from the hole edge of the female die to the edge of the lower die is 32.

Material thickness > 1.5-3 The distance from the hole edge of the female die to the lower die edge is 36.

Material thickness > 3-5 The distance from the hole edge of the female die to the lower die edge is 46.