1. The main cylinder and the blank holder force of the machine tool are not good, and the forming pressure is too low, which does not reach the CAE reference pressure value, so it is necessary to adjust the forming pressure treatment;
2. The sheet size is too short, the material activity is too fast when forming, and the drawing bead does not play an effect. The treatment method needs to increase the material size; Metal stamping parts
3. The pressing surface is not pressed in place. The inner ring is too loose and the outer ring is too tight.
4. The height of the drawbead is too low, and the drawbead cannot work in the process of sheet metal forming, resulting in too fast material activity, so it is necessary to repair welding and increase the drawbead for debugging;
5. The process design and modeling is unreasonable. In the process of CAE theoretical analysis, there is a tendency of stacking, and no measures are taken, which leads to the severe production of stacking.
6. The height of the top rod of the mold is inconsistent, and the contact block of the blank holder is not uneven. In the process of stamping again, the uneven hand of the blank holder leads to the crinkling of the plate.
