If there are many products stamped at one time, then the first punching. The high nuts will be applied to the board first, and the low ones will not be pressed to the end, and the little teeth will be exposed outside, and it will be stamped again.
All pressed in, but when the second is pressed, the high nuts will be deformed, resulting in thread deformation, or plate bulging.
From a technical perspective, there are many factors that cause product T values to be unstable:
1: the verticality of the mold
2: Stability of the feeding system of the equipment
3: Stability of the equipment cutting system
4: Wire diameter stability of raw materials
5: The verticality of the device itself
6: Verticality of mold parts
7: The problem of personnel