Why do metal stamping parts appear to be turned and twisted? How to solve it?

The metal stamping parts are formed in the progressive die by punching the remaining material around the stamping parts to form the shape of the stamping parts. The main reason for the turning and distortion of stamping parts is the influence of punching force. During punching, due to the existence of the punching gap, the material is stretched on one side of the die (the material is warped upward) and compressed on the side of the male die. When using the unloading plate, use the unloading plate to compress the material to prevent the material on the die side from warping upwards. At this time, the force of the material changes accordingly. As the discharge plate increases its pressing force, the material on the punch side is stretched (compression force tends to decrease), while the material on the concave die surface is compressed (tension force tends to decrease). The overturning of the stamping part is caused by the stretching of the material on the die surface. Therefore, when punching, pressing and compressing the material is the key point to prevent the punching from turning over and twisting. The reasons and solutions for turning over and twisting of stamping parts: 1. It is caused by the burrs of the stamping parts during punching. Need to study the cutting edge, and pay attention to check whether the blanking gap is reasonable. 2. The turning, distortion and deformation of the punched parts have occurred during the punching process, which leads to poor forming after bending, which needs to be solved from the punching and unloading station. 3. 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 material during the bending process to prevent the stamping part from slipping during bending are the key points to solve the problem. Why do metal stamping parts appear to be twisted? How to solve it? I believe everyone has already understood. The main reason for the distortion of the stamping parts is the influence of the punching force and the unreasonable blanking gap and uneven clearance. Through the above methods, these problems can be effectively solved and the stamping parts can be prevented from turning and twisting.