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。
In accordance with the demand analysis and business processes, dividing software functional modules, building data structure, drawing up test methods.
根据测试系统的需求分析和业务流程，划分软件功能模块、建立数据结构、制定试验方法。
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