YZD 20B型电机机壳是扁圆形零件(见图1),材质为0.35毫米的08F钢板。根据零件形状,我们采用落料拉深、拉深、整形、冲孔翻边、切边、冲双槽口缺口、冲螺口方孔等七道工序来完成。落料拉深、拉深、整形模具的工艺参数选用常用的模具设计手册中圆筒形或矩形拉深模具的工艺参数,设计制造的模具冲压零件,其质量难以保证,经常出现直边侧壁和圆弧 YZD 20B motor housing is a flat round parts (see Figure 1), the material is 0.35 mm 08F steel. According to the shape of the parts, we use blanking drawing, drawing, shaping, punching and burring, trimming, punching double notches, punching holes and other seven holes to complete the process. Blanking drawing, drawing, plastic mold process parameters commonly used in the mold design manual cylindrical or rectangular drawing process parameters, the design and manufacture of die stamping parts, the quality of it is difficult to guarantee, often appear straight side wall And arc