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针对某汽车发动机罩内板件,通过工艺分析确定其成形工艺,并建立成形过程的有限元模型,对其进行全工序的数值模拟。根据数值模拟结果对发动机罩内板件的板料进行了优化,该零件最初采用矩形板料拉延成形,通过数值模拟优化,最终确定采用材料利用率较高的弧形板料。采用弧形板料得到该零件的材料利用率从原来的46.69%提高到50.92%。有限元软件的模拟结果与实际试模情况进行比较,得出模拟结果和实验基本吻合,验证了本文建立的有限元模型的正确性。
Aiming at the inner panel of an automobile hood, the forming process is determined through the process analysis, and the finite element model of the forming process is established, and the numerical simulation of the whole process is carried out. Based on the numerical simulation results, the sheet metal of the inner panel of the hood was optimized. The part was initially drawn by rectangular sheet and optimized by numerical simulation. Finally, the arc sheet with higher material utilization rate was determined. The use of curved sheet material to obtain the parts utilization increased from 46.69% to 50.92%. Finite element software simulation results compared with the actual test mode, the simulation results and experimental basic agreement, verify the accuracy of the finite element model established in this paper.