Solution to the problem of punching size of metal stamping parts not meeting the requirements

Solution to the problem of punching size of metal stamping parts not meeting the requirements

During the production process of metal stamping parts, the punching size may be too large or too small, and there may be a large difference with the punch size. In order to solve such problems, in addition to considering the planning size, processing accuracy and blanking clearance of the forming convex and concave dies, we should also consider the following aspects.

1. In the production of metal stamping parts, the burrs of the punching parts produced during blanking need to be repaired, and the punching edge should be checked to see if the blanking clearance is reasonable. The instability of the stamping parts during bending is mainly caused by U-shaped and V-shaped bending. The key to solving the problem is to guide the stamping parts before bending, guide the parts during bending, and press the materials during bending to prevent the stamping parts from slipping during bending.

2. In the production of metal stamping parts, the tensile stress on the material increases, and the tendency of the stamping parts to flip and twist increases. When flipping occurs, the punching size will decrease. Strong pressure on the material causes plastic deformation of the material, which will lead to larger punching size. When the strong pressure is reduced, the punching size will be smaller.

3. In the production of metal stamping parts, if the end is trimmed with a bevel or arc, the punching part is prone to flipping and contamination because the punching force is relieved, so the punching size will be larger. If the end of the punch is flat, the punching size will be relatively smaller.