What is the reason for the poor punching size of precision stamping parts? Hardware tells you

What is the reason for the poor punching size of precision stamping parts? Hardware tells you that in the production process of precision stamping parts, you will encounter situations where the punching size is too large or small, and the size of the punch is quite different. In order to solve this problem, we have considered the planned size of the convex and concave molds. In addition to the components such as processing accuracy and blanking gap, it is also necessary to consider the following aspects. 1. It is caused by the burrs of the punching parts when the precision stamping parts are punched. The punching edge needs to be researched, and pay attention to check whether the punching gap is reasonable. It is caused by the instability of stamping parts during bending, mainly for U-shaped and V-shaped bending, guiding the precision stamping parts before bending, guiding during the bending process, and pressing the material during the bending process to prevent stamping The main point to solve the problem is the slippage of the piece during bending. 2. The tensile stress of precision stamping materials increases, and the tendency of stamping parts to turn over and twist increases. When turning over, the size of the punching hole will become smaller. The strong pressure on the material deforms the material, which will cause the size of the punched hole to become larger. When the strong pressure is reduced, the punching size will become smaller. 3. For precision stamping parts, if the end is trimmed with bevels or arcs, because the punching force is relieved, the stamping parts are prone to turning over and smearing, so the punching size will become larger. When the end of the punch is flat (no bevel or arc), the punching size will be relatively small. The above is the introduction of the hardware author on the poor size of the precision stamping parts. I hope you can refer to it.