Production process of body of two-piece can

A production process of the body of a two-piece can sequentially includes the steps of A, stamping a metal piece into a cup-shaped blank; B, stretching the cup-shaped blank until the stretching height H of the blank wall is larger than the can wall height design value h; C, using bottom stamping equipment to stamp the bottom of the blank, and allowing the stretching interference part of the blank wall to be pulled towards the center of the blank bottom and be bent and yielded under pressure to become the component of the blank bottom by the aid of the joint effect of radial pull force and the downward pressure of an upper die core. By the production process, the risk of pull crack and injury at the junction transition part between the can wall and the can bottom can be lowered greatly. 种两片罐罐身生产工艺，依次包括以下步骤：A、将金属片冲压成为杯形坯体；B、将杯形坯体拉伸，拉伸到最后的坯壁拉伸高度值H大于所述罐壁高度设计值h；C、采用冲底设备进行冲底步骤，在对坯底实施冲压过程中，依靠坯底径向拉力和上模芯向下压力的共同作用，使坯壁拉伸过盈部位被向坯底中心方向拉扯并受压弯曲屈服而变成为坯底的组成部分。本发明可以大幅度降低在罐壁与罐底交界转折部位出现拉裂拉伤的危险。