汽车灯罩零件表面要求较高，不允许有划伤和起皱痕迹，它的成形难点在于零件

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.

Car lampshade part surface requirements are high, do not allow scratches and wrinkle marks, its forming difficulty lies in the part pull deepness, part shape is parabolic, size is difficult to control. In addition, parts in the process of deeping is very easy to produce wrinkles and cracking phenomenon, and mold in the forming of deep, metal contact between each other, will produce glue wear, that is, adhesion phenomenon, once the mold has a slight scratch marks, exacerbated the scratch on the surface of the pulled deep part. Parabolic parts in the process of depthing, because the pressure edge force is difficult to control, fracturing and wrinkle phenomenon is quite common, not only to consider the flow of materials, but also to avoid part wrinkles, so low convex mold surface roughness value, suitable mold clearance and die fillet shape size is the key to ensure the surface quality of parts.

Automobile lampshade parts have high surface requirements, and no scratch and wrinkle marks are allowed. Its forming difficulty lies in the large drawing depth of parts, the shape of parts is parabolic, and the size is difficult to control. In addition, the parts are prone to wrinkle and crack in the process of drawing, and when the dies are in deep drawing, the metal contact will produce adhesive wear, that is, adhesion phenomenon. Once the dies have slight scratch marks, the scratch on the surface of the drawn parts will be aggravated. In the drawing process of parabolic parts, because the blank holder force is difficult to control, the phenomena of crack and wrinkling are quite common. It is necessary to consider the material fluidity and avoid wrinkling. Therefore, low surface roughness of punch and die, appropriate die clearance and die fillet shape and size are the key to ensure the surface quality of parts.<br>