1. Compact the material. Improve the traditional mold design structure, and open a material-containing gap on the discharge plate (that is, when the mold is closed, the discharge plate is attached to the concave mold, and the gap between the discharge plate and the concave mold where the material is contained is the material thickness t-0.03 ~0.05mm). It can make the unloading plate move smoothly during the stamping, and the material can be compressed. The key forming part, the unloading plate must be made into a block-type structure, so as to facilitate the solution of the wear (compression) loss of the pressing part of the unloading plate caused by long-time stamping, and the defect that the material cannot be compressed. Use the discharge plate to compress the material to prevent the material on the die side from warping upwards.
2. Arrange the cutting order reasonably. In the progressive die, the arrangement of the blanking sequence may affect the accuracy of stamping parts forming. For the blanking of small parts of stamping parts, generally a larger area of punching is arranged first, and then a smaller area of punching is arranged to reduce the influence of the punching force on the forming of the stamping part.
3, the end of the punch edge is trimmed with a bevel or arc. This method can effectively reduce the buffer cutting force. After the punching force is reduced, the tensile force on the side material of the die can be reduced, and the phenomenon of turning over and twisting of the Metal Stamping parts can be avoided.
4. Pay attention to maintaining the sharpness of punching convex and concave die cutting edges. If the punching edge is worn, the tensile stress on the material will increase, which will increase the tendency of stamping parts to turn over and twist. Therefore, maintenance work should be done to avoid the wear of the punching edge.
5. Add a strong pressure function. That is to increase the size of the press part of the unloading insert (normal unloading insert thickness H+0.03mm) to increase the pressure on the material on the side of the die, so as to prevent the stamping part from turning over and twisting during punching.