Add a few points
1. The size on the product drawing should be marked on one side as much as possible to make it clear whether the outer size or the inner cavity size is guaranteed. The inner and outer sizes cannot be marked at the same time. If the drawings provided by other people have such problems, you should communicate with them. If it can be unified, it should be unified. If it cannot be unified, you should understand the assembly relationship between the workpiece and other parts.
2. In the last process, the size of the workpiece is outside, the die is the main one, and the gap is obtained by reducing the size of the punch; the size of the work piece is inside, the punch is the main one, and the gap is obtained by increasing the size of the die
3. The fillet radius of the convex and concave molds should be designed to be as small as possible to facilitate subsequent mold repairs.
4. Refer to when judging the cause of cracking of the workpiece: the cracks caused by poor material quality are mostly jagged or irregular, and the cracks caused by the process and the mold are generally relatively neat.
5. "More wrinkles, fewer cracks". According to this principle, adjust the flow of materials. The method includes adjusting the pressure of the blank holder, increasing the drawing bead, trimming the corner radii of the punch and the die, and cutting the processing opening on the workpiece.
6. In order to ensure wear resistance and prevent tensile scratches, the punch and die and the edge holder must be quenched, or hard chrome plated, or surface TD treated. When necessary, tungsten carbide can be used as convex and concave molds.
热门资讯
