求翻译：简要地介绍了复合模具设计课题的背景，针对顶罩的结构特点对制件进行了工艺性分析，通过对单工序模，级进模和复合模的比较分析提出了合理的工艺方案。按照冲压复合模具的设计步骤,，根据计算规则计算出毛坯尺寸，并通过材料利用率的比较确定冲压工序和排样图，讨论 了主要工件间隙的确定刃口尺寸的计算。在各部分零件设计选取后，对所设计的模具的工作过程进行了深入的介绍。该模具提高了制件质量和生产效率，降低了模具成本，制件质量复合生产要求。是什么意思？

A brief introduction to the background of the composite mold design issues, the structural characteristics of the top cover on the parts of the process analysis, comparative analysis of the single-process mode, progressive die, compound die rational process. Composite stamping mold design steps, acc

Briefly describes the composite mold design issues for the background, and top cover of the structural features of the system is to be in the process of analysis, the process model, click the template and a composite model of the comparative analysis presented a reasonable process. According to punc

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Brief introduction of the design of the compound die project background, for top covers analysis of structure characteristics on the part of the process, through a single process mode, and comparative analysis of compound die of progressive die made a reasonable scheme. By punching compound die desi

正在翻译，请等待...