在分析了汽车发动机舱盖结构和工艺特点的基础上,确定了零件的冲压工序过程图,并对拉深、修边和翻边工艺性进行了阐述。同时,介绍了汽车覆盖件模具结构设计特点,并以CATIA为计算机辅助设计工具,设计出发动机舱盖拉深、修边及翻边成形所需的模具零件并对模具零部件进行装配,得到模具的装配体的三维数模。指出设计汽车覆盖件模具需要注意的要点:拉深模的设计重点是导滑板与调压垫和墩死垫的布置;修边模的设计重点是凹模的分块与废料刀的布置;翻边模的设计重点是翻边顶出器的布置。 Based on the analysis of automobile engine hatch cover structure and process characteristics, the drawing process of parts was confirmed, and the drawability, trimming and flanging process were elaborated. At the same time, the design features of mold structure of automobile cover are introduced, and the mold parts required for deep drawing, trimming and burring of engine cover are designed with CATIA as CAD tool, and mold parts are obtained by mold assembly The assembly of three-dimensional digital model. The key points that should be noticed in the design of automobile panel mold are pointed out as follows: the design of the drawing mold is focused on the arrangement of the skid plate, the pressure pad and the dead pad of the pier; the design of the trimming mold is the partition of the mold and the arrangement of the waste knife; The design of side mold is the arrangement of the flange ejector.