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在锻造生产中,为减少用空心冲头冲孔产生的余料损失,可采用圆锥形内腔的空心冲头(图1)。利用改变冲头内腔的斜角α来调节冲孔余料的重量。
In the forging production, in order to reduce the residual loss caused by punching with hollow punch, hollow punch with conical cavity can be used (Figure 1). Adjust the weight of punching residual material by changing the bevel angle α of the punch cavity.