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我厂生产的圆筒形零件如图1所示。采用变薄拉深工艺进行生产。由于零件底部厚度有要求,因此只能按零件底部的厚度来确定钢板的厚度。因为变薄系数的限制,需要2次延伸和2次变薄。在生产中,由于定位圈与凹模不同心、延伸凸模与凹模间隙不均匀、凹模轴线与零件底部不垂直,以及经过多次延伸变薄,零件壁厚差较大,有时废品率达30％。经过试验,改用直径减小壁厚变薄拉深法
I produced the cylindrical parts shown in Figure 1. Thin-walled drawing process for production. Due to the thickness of the bottom part of the requirements, so only the thickness of the bottom of the part to determine the thickness of the plate. Due to the limitation of the thinning factor, 2 extensions and 2 thinning are required. In the production, due to the positioning ring and the die is not the same, extending the gap between the punch and the die is uneven, the die axis and the bottom of the part is not vertical, and after several times to extend the thinning, large parts thickness difference, and sometimes rejection rate Up to 30%. After testing, use the diameter to reduce the thickness of thinning deep drawing method