Main Causes of Metal Tensile Die Strain
As one of the main stamping procedures, metal drawing die drawing is widely used. The stretching process of the metal stretching mold can be used to make various cylindrical, rectangular, stepped, spherical, tapered, parabolic, and other irregularly shaped thin-walled parts. However, there is a consumer response that the metal stretching mold will be strained. What causes this?
There are two main reasons for the strain of the metal tensile mold during the formation of the workpiece. The first is due to the macro mechanical unevenness of the convex and concave surface of the metal tensile mold or the convex and concave of the formed material and the metal tensile mold If other hard particles are interposed between the surface of the mold, mechanical wear will be formed on the surface of the workpiece or the surface of the convex and concave molds of the metal drawing mold. The solution is to carefully grind the surface of the convex and concave molds of the metal drawing mold and strengthen production. Environmental management. The second is the strain caused by the adhesion and wear of the workpiece surface of the metal stretching mold and the surface of the convex and concave molds of the mold. It is also the most common and not easily solved condition in the production. It solves the problem of the strain in the forming process of the mold and the workpiece. Should be based on the basic principle of reducing adhesive wear, by changing the nature of the contact pair as a starting point. Adding a film such as PVC between the metal stretching mold and the forming material can sometimes solve the problem of the workpiece's strain. For the production line, the film can be continuously supplied through the mechanism. For the stamping equipment of the cycle production, a film is added for each workpiece, which affects the production efficiency. However, the method is generally costly and generates a large amount of waste. This method is advisable for the production of large-scale large-scale workpieces.