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以某汽车减震器为例,通过分析零件结构,得出单道次不能成形的结论;于是采用多道次成形,根据成形理论基础,设计加工工艺过程,计算每道次材料的减薄率,提出每次减薄率分别为0.23、0.30、0.46的三道次成形策略。建立有限元模型进行数值模拟,比较分析厚度值,模拟厚度结果符合工艺设计最小壁厚0.7mm的要求。模拟证明了某汽车减震器多道次渐进成形方案设计的正确性,为渐进成形在侧壁较陡制件上的推广应用及多道次的工艺设计提供了一定的理论依据。
Taking an automobile shock absorber as an example, the conclusion of single pass can not be formed by analyzing the structure of the part. Therefore, the multi-pass forming method is used to design the processing technology according to the forming theory and calculate the thinning rate of each pass , Put forward the thinning rate of 0.23,0.30,0.46 three-pass forming strategy. The finite element model was established for numerical simulation. The thickness values were compared and analyzed. The simulated thickness results meet the requirements of the minimum wall thickness of 0.7mm for the process design. The simulation proves the correctness of multi-pass progressive forming scheme of some automobile shock absorber, which provides some theoretical basis for the popularization and application and multi-pass process design of progressive forming on steeper sidewalls.