车身零件翻边前一般有修边工序，需要准确的修边线，否则翻边后零件达不到零件尺寸要求。
Before flanging auto-body panels, a feasible trimming line should be obtained, otherwise the final part shape after flanging cannot meet the dimensional requirement.
分析了消声器隔板的成形工艺，在两次拉伸工序中间增加修边工序，从而保证了零件的成形尺寸。
The forming process for the insulation plate of the muffler was analyzed. The trimming operation was added between the two times of drawing to ensure the forming dimensions of the part.
根据所确定的工艺方案对各工序模具进行设计，并介绍了成形模和修边侧冲孔模的模具结构以及关键零件的设计。
Moulds of each process is designed in light of the process optimized, and introducing the mould structure of the forming mould and side punch mould for trimming, and the design of key pieces.
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