composed concave die 组合凹模的
metal concave die 金属凹模
moving concave die 活动凹模
Spiral concave die 螺旋凹模
concave-die-drawing 凹模拉延
compound concave die 复合凹模
Also introduced the measure of prevent the convex and concave die cracking in course of pressing.
优化了模具结构，同时也介绍了在冲压过程中凸、凹模易开裂采取的措施和方法。
By numerical simulation of a six-tooth rectangle spline, the optimized half-angle of the concave die can be got.
结合六齿矩形花键轴实际成形情况进行模拟计算，获得了入模半锥角的较佳取值范围。
Finally, each optimized design parameter of the concave die structure had achieved, and obtained the anticipated result.
最后达到了凹模结构的各个参数的优化设计，得到了预期的结果。
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