The size of stamping parts is too large or too small

In the daily operation of stamping parts, the size of the punching hole is too large or small (perhaps across the standard request) and the size of the punch is greatly different, except for the planning and processing of the convex and concave molds. In addition to the precision and blanking gap, it should be managed from the following aspects. 1. It is caused by the burrs of the punching parts during blanking. Need to study the cutting edge, and pay attention to check whether the blanking gap is reasonable. It is caused by the instability of stamping parts during bending. Mainly for U-shaped and V-shaped bending. To deal with this problem, the guiding position of the stamping part before bending, the guiding position during the bending process, and the pressing of the data during the bending process to prevent the stamping part from slipping during bending are the key points to solve the problem. It is caused by the burrs of the punching parts during the blanking. Need to study the cutting edge, and pay attention to check whether the blanking gap is reasonable. 2. When the punching edge is worn, the tensile stress on the material increases, and the tendency of stamping parts to turn over and distort increases. When the material is turned over, the size of the punching hole will become smaller. The strong pressure on the material causes the material to undergo plastic deformation, which will cause the punching size to become larger. When the strong pressure is reduced, the size of the punching hole will become smaller. 3. The shape of the edge of the punch blade. If the end is trimmed with a bevel or arc, the punching force is easy to turn over and smear due to the relief of the punching force, so the punching size will become larger. When the end of the punch is flat (no bevel or arc), the punching dimension will be relatively smaller. In the detailed operation practice, a detailed analysis should be made for the detailed title problem, and then the countermeasures to solve the problem should be found. Related news: The characteristics of the main materials of stamping parts, the treatment of common problems of stamping parts, the characteristics of scaffolding stamping parts and the importance of inspections