Analysis of the causes of product rupture in stamping processing plants and solutions-hardware

In the production workshop of a stamping processing plant, sometimes the tensile stress on the cylinder wall of the stamping part exceeds the strength limit of the material due to some reasons, and the product will crack, and the crack generally appears in the cylinder slightly above the round corner of the punch. Wall. The factors that affect the product's cracking are: the tensile properties of the material, the diameter and thickness of the material, the drawing coefficient, the fillet radius of the concave and convex mold, the blank holder force, the friction coefficient, etc. The radius of the rounded corners of the concave and convex molds is too small and too sharp, and it is easy to crack the product. The general method of repairing the mold is to find a way to enlarge the rounded corners, make the rounded corners a little smoother, and polish the corners. It is also possible to add oil during production, especially the special oil for stretching, which is very effective. When designing a stamping die, you can try to enlarge the rounded corners if the customer’s product requirements allow it. Don’t make it too sharp. Some designs are not well understood. The designed drawing die cracks very much during the trial. Awesome. When stretching, necessary lubrication is used, which is conducive to the smooth progress of the stretching process, and the thinning of the cylinder wall is improved. However, it must be noted that the lubricant can only be applied to the working surface of the concave mold, and the surface of the convex mold and the material must not be lubricated, because there is a favorable friction between the convex mold and the surface of the blank, which can prevent the material from sliding and pulling. Cracking and thinning. You planted a tree in the hardware, and people gave you a forest. When you choose a stamping factory and choose hardware, whether you are technically consulting, or you need a prototype, or your mold and mass production needs, people, respect your needs, and give you the result you expect !