In the course of drawing process, the process interference and defect take place because of the difference between the centerline of concave die and the trace of moving direction.
结晶器铜管在引仲加工过程中，由于凹模中心线与机床运动方向轨迹线不同，造成加工干涉和产品缺陷。
Through theoretical analysis, probability revisal and experimental test, the limit drawing ratio of a tapered cup drawn by cylinder convex punch and tapered concave die is determined in tis paper.
通过理论分析，概率修正和实验验证，确定出利用柱形凸模、锥形凹模一次拉深锥形件的极限拉深比。
The structure and design points of hard alloy drawing combination concave die were introduced in detail and provided the reference to the similar die design.
对硬质合金拉伸凹模结构及设计要点作了详细介绍，对同类型模具设计提供了参考。
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