How to deal with the split problem of automotive stamping parts?

2021-05-25 15:56:18

Stamping parts are obtained under the action of impact pressure, so there will be certain deformation, size, shape and other aspects of the corresponding deformation. For stamping parts, sheet metal, die and equipment are three indispensable elements in the forming process, which play a vital role in the forming quality of stamping parts.

From the current metal workpiece, a large part of the finished products are pressed, such as car body, radiator, container shell, motor, electrical iron core, silicon steel sheet and so on. In the process, as long as the compound die is adopted, the multi-channel stamping technology operation can be completed on one press, which greatly improves the production efficiency of stamping parts.

Stamping parts have the characteristics of thin, uniform, light and strong, because they can be used to manufacture those workpieces with reinforcing ribs, ribs, curling or flanging, so as to improve their rigidity and ensure the quality of finished products and high qualified rate.

Automobile stamping parts in the production process will have bad phenomenon, but it is inevitable, but after more times will make the quality of the whole workpiece decline. Especially in the process of drawing, the flange wrinkle and side wall wrinkle and other defects appear due to the effect of tightening deformation. This problem is relatively easy to solve. As long as the tensile stress in the moving plate is selected, or the tensile rib is increased, and the radius of the die fillet is reduced, the wrinkles can be eliminated. But if the deformation of the stamping part is too large, what should be done?

Firstly, blanking method can be used to ensure the quality of the marginal section of the blank; Then, the marginal state of blank is improved. Generally, the standard of concave flanging blank is determined by appropriately increasing the material standard, and the stamping skills are adjusted to avoid splitting. Secondly, to ensure that the punch and die vacancy is uniform, so that the resistance of the material into the die is also uniform, which is also beneficial to reduce the splitting.

If the split is caused by drawing, it can be improved by increasing the radius of punch and die fillet, properly adjusting the blank holder force and reducing the deformation resistance of flange deformation area, so as to fully ensure an ideal forming quality of automobile stamping parts.