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翻边是汽车覆盖件成形的重要工艺之一,对成形零件的回弹具有较大影响。从理论上分析了翻边的变形机理及翻边回弹的原因。以汽车翼子板为例,提取翻边模型,采用有限元法研究了翼子板与前盖配合棱线的回弹,通过与实测值比较发现,结果基本一致,证明了有限元模型的有效性。基于此,进一步分析了模具几何参数和工艺参数对回弹量的影响,为翼子板模具设计提供理论依据。
Flanging is one of the important processes for forming automotive panels and has a large impact on the springback of the formed parts. The deformation mechanism of flange and the reason of flanging rebound are theoretically analyzed. Taking the automobile fender as an example, the flange model was extracted, and the rebound of the ridgeline fitted with the front cover was studied by using the finite element method. The results were basically consistent with the measured values, which proved the effectiveness of the finite element model Sex. Based on this, the influence of the geometrical parameters of the mold and the process parameters on the springback is further analyzed, which provides a theoretical basis for the design of the fender mold.