管件电磁渐进胀形的数值模拟及成形均匀性  

Research on numerical simulation and forming uniformity of electromagnetic incremental tube bulging

作　　者：赵健[1] 莫健华[1] 崔晓辉[1] 邱立[1] 

机构地区：[1]华中科技大学材料科学与工程学院,武汉430074

出　　处：《塑性工程学报》2012年第5期92-99,共8页Journal of Plasticity Engineering

基　　金：国家973计划资助项目(2011CB012802);国家自然科学基金资助项目(50875093)

摘　　要：文章将渐进成形的思想融入到传统的管件电磁胀形工艺中,提出管件电磁渐进成形的新工艺,即采用小尺寸线圈,通过移动多次成形的方式成形长管件。提出了适合于管件电磁渐进胀形工艺的顺序耦合数值模拟方法,并与一次放电、两次放电、三次放电的实验结果进行对比,模拟结果与3组实验数据均吻合。采用数值模拟的方法,进一步研究重叠率和成形顺序对管件变形均匀性的影响,研究结果表明,重叠率为50%、成形顺序为b→c→a时,可获得最佳的成形均匀性。电磁渐进成形技术应用于管件胀形工艺中具有可行性,对实际生产具有指导意义。This paper proposed a novel technology, named tube electromagnetic incremental bulging, which integrates the incremental forming technology into traditional electromagnetic tube bulging. A suitable sequential coupling method was developed to simulate the electromagnetic incremental tube bulging. Compared with experimental data of three groups, the simulation values were in good agreement with the experimental ones. Based on the above researches, the numerical simulation method was used to analyze the main effect factors on forming uniformity, such as overlap rate and forming order. The results showed the optimum overlap rate （50%） and forming order （b→c→a） led to the best forming uniformity. The experimental and numerical simulation results both demonstrated the feasibility of the eleetromagnetic incremental technology in tube bulging.

关 键 词：管件胀形 电磁渐进成形 重叠率 成形顺序 成形均匀性 

分 类 号：TG391[金属学及工艺—金属压力加工]