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基于有限元分析软件ETA/Dynaform,对铝合金发盖内板的充液拉深过程进行数值模拟。建立了有限元模型,得到了最优液室压力加载路径,并研究了零件充液成形过程的成形性能。研究结果表明,液室压力加载路径对充液成形零件质量的影响较大,成形所需的最大液室压力为10 MPa,且液室压力不宜加载过早。通过充液成形技术的应用,消除了成形过程中的破裂、起皱等成形缺陷,达到了提高成形性能的目的。模拟实验和物理实验验证相吻合,均得到合格的铝板拉深件。
Based on the finite element analysis software ETA / Dynaform, the numerical simulation of the liquid-filled drawing process of aluminum alloy inner cap is carried out. The finite element model was established and the optimal liquid pressure loading path was obtained. The formability of the part was also investigated. The results show that the liquid chamber pressure loading path has a great influence on the quality of liquid filled parts. The maximum liquid chamber pressure required for forming is 10 MPa and the liquid chamber pressure should not be loaded too early. Through the application of liquid filling forming technology, forming defects such as cracking and wrinkling in the forming process are eliminated, and the forming performance is improved. Simulation experiments and physical experiments are consistent, have been qualified aluminum drawing pieces.