What are the common problems with Stamped Part?

1. Warping of parts

In the punching operation, the stretching and bending stress the parts bear is obvious, which can easily cause shape distortion. The effect can be improved by pressing the parts closely between the punch and the pressure plate during the punching process and ensuring the blade edge remains sharp. When the shape of the stamped parts is complex, the shear force generated around the stamping part is unevenly distributed, which causes the force to be transmitted the periphery to the center, resulting in the parts warping phenomenon. In this case, the pressure force can be increased.

2. Wrinkling

When the stretching of the stamping part is too deep, it will cause the plate to flow too fast during transmission, which will lead to the wrinkling phenomenon. In the stretching process, if the angle of the concave die is designed too large, it may cause the punch to be difficult to effectively compress the material, which will promote the plate to flow too fast and eventually to the appearance of wrinkling problems. At the same time, the design of the pressure ribs in the stamped parts is inappropriate, the size is too small and the positioning is inaccurate which will cause the movement of the plate to slow down, thus causing the wrinkling phenomenon.

3. Dimensional accuracy errors

During the mold manufacturing process, if the dimensional of the blade edge fails to meet the specified standards, it will cause the dimensional deviation of the stamped parts produced. For example, in the punching process, the parts are prone to rebound phenomenon, which will cause the positioning datum in the subsequent process to be inaccurate with the parts and cause deformation, affecting the dimensional accuracy of the stamping part