The surface requirements of automob

The surface requirements of automobile lampshade parts are relatively high, and scratches and wrinkles are not allowed. The difficulty of its forming lies in the deep drawing of the parts, the shape of the parts is parabolic, and the size is difficult to control. In addition, the parts are prone to wrinkles and cracks during the deep drawing process, and when the mold is formed and drawn, the metal contacts each other, which will cause adhesive wear, that is, adhesion. Once the mold is slightly scratched Marks aggravate the scratches on the surface of the part being drawn. In the drawing process of parabolic parts, because the blank holder force is difficult to control, the phenomenon of cracking and wrinkling is quite common. It is necessary to consider the fluidity of the material and avoid the wrinkling of the part, so the surface roughness value of the convex and concave mold is low. , Appropriate mold clearance and die fillet shape and size are the key to ensuring the surface quality of parts.