黄河牌汽车的变速器换挡忏弹簧座如图1所示,其冲压工艺过程如图2所示。在拉延过程中,由于材料的纤维组织引起各向异性,其筒形边缘会出现高低不齐的波浪形状,它的大小将随材料的塑性、拉延零件相对高度(零件高度 h 与拉延直径 d 的比值)的增大而增大,它的大小也随相对料厚(材料厚度 t 与拉延直径 d 的比值)的增大而减小。而本零件要 Yellow River brand transmission Shuanghui Recessed spring seat shown in Figure 1, the stamping process shown in Figure 2. In the process of drawing, due to the anisotropy of the fibrous structure of the material, the irregular edges of the cylindrical edge will appear undulated. The size of the drawn edge will be dependent on the plasticity of the material and the relative height of the part is drawn Diameter d ratio) increases, and its size decreases with the relative material thickness (material thickness t and drawing diameter d ratio) increases. The parts to