铝合金马鞍形件充液成形工艺模拟分析

摘要

To study the hydroforming process method for flexible manufacturing of saddle parts with high precision and high quality.Using the finite element dynamic display analysis, the forming process programs of the passive forming and hydraulic bulging were analyzed.And the rationality of the process program was judged by comparison and analysis of the thinning rate and the forming limit diagram.For the aluminum alloy saddle parts, the contrastive analysis of two schemes showed that the maximum thinning rate of thickness was 14.3% and 7.2% in the passive forming and hydraulic bulging processes, respectively.In both processes, the location was at the top of the surface supplementing part.The forming limit of both schemes were within the safe range, without rupture phenomenon.Through process simulation analysis, it was re-vealed that for aluminum alloy saddle parts the one-mold-two-piece hydraulic deep drawing forming method was more rea-sonable, with lower cost, shorter processing cycle, higher processing efficiency, and higher forming accuracy.%目的：研究板材充液成形柔性制造高精度、高质量马鞍形件的工艺方法。方法利用有限元动力学显示分析方法，对充液拉深和液压胀形两种成形工艺方案进行分析，并对比分析减薄率和成形极限图判断工艺方案的合理性。结果针对铝合金马鞍形件，通过对比分析2种方案，充液拉深工艺中的最大减薄率达到14．3％，液压胀形最大减薄率为7．2％，位置均在型面补充件的顶部，2种方案的成形极限都在安全区域内，未见破裂现象。结论通过工艺模拟分析，得到对铝合金马鞍形件，采用一模两件液压拉深成形工艺较合理，成本较低，加工周期短，加工效率高，成形精度高。