In daily production, you will encounter the situation that the punching size is too large or small (may exceed the standard requirements) and the size of the punch is quite different, except for the planning scale of the forming convex and the concave mold, the processing accuracy and the blanking gap In addition to other factors, we should also consider the following aspects to deal with.
When the punching edge is worn, the tensile stress on the material increases, and the tendency of the stamping parts to turn over and distort increases. When turning over, the size of the punching hole will become smaller. The strong pressure on the material causes plastic deformation of the material, which will cause the size of the punching hole to become larger. When the strong pressure is reduced, the size of the punching hole will become smaller. The shape of the edge of the punch. If the end is trimmed with a bevel or arc, because the punching force is slowed down.
The punching parts are not easy to turn over and distort, therefore, the punching dimension will become larger. When the end of the punch is flat (no bevel or arc), the punching dimension will be relatively smaller. According to the method to prevent the stamping parts from turning over and distorting (1). Reasonable mold planning. In the progressive die, the organization of the blanking sequence may affect the accuracy of stamping parts.
Link to this article：Introduction to common problem knowledge of precision stamping parts
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