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模具结构设计是一个面向模具整体功能的装配设计过程，建立“自顶向下”的设计流程是提高结构ＣＡＤ效率的根本途径，提出了一个支持“自顶向下”模具结构设计的“装配模型”，在分析了级进模结构特点之后，本文介绍级进模结构ＣＡＤ系统ＨＰｒｏＤｉｅ中“自顶向下”设计方法的实现过程。
Mold structure design is an assembly design process oriented to the overall function of the mold. Establishing “top-down” design flow is the fundamental way to improve the efficiency of the structure CAD. An assembly model is proposed to support the “top-down” mold structure design After analyzing the structural characteristics of the progressive die, this paper introduces the implementation of the “top-down” design method in the HProDie CAD system of the progressive die structure.