大型复杂型面铝合金翻边件电磁成形塑性流动行为研究  

Research on Plastic Flow Behaviors for Hole Flanging Part of Aluminum Alloy with Large Complicated Profiles by Electromagnetic Forming

作　　者：黄亮[1,2] 骆文勇 刘贤龙[1,2] 李建军[1,2] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074 [2]华中科技大学材料科学与工程学院,武汉430074

出　　处：《机械工程学报》2013年第24期24-29,38,共7页Journal of Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划;2011CB012802);材料成形与模具技术国家重点实验室自主研究课题(2012-9)资助项目

摘　　要：大型复杂型面铝合金翻边件电磁成形是一个电磁场和结构场耦合作用下的复杂塑性成形过程。由于大型复杂型面的影响,使得铝合金翻边件在电磁成形过程中的塑性流动行为与传统带凸模翻边成形不同。基于松散耦合法建立耦合电磁场和结构场的大型复杂型面铝合金翻边件电磁成形有限元模型,研究采用1层、2层和3层平板线圈电磁翻边下的板料塑性流动行为,并采用试验研究揭示了不同压边力控制下板料法兰部分塑性流动规律。结果表明,当采用3层平板线圈时,翻边件的复杂型面部分完全贴膜,法兰部分材料进入凹模腔的部分更多,促使板料发生更多的塑性流动;不同压边力控制下,法兰部分由塑性流动产生不同的工件形式,在压边力不足时,法兰部分产生明显的起皱现象;通过合理的压边力控制,可得到贴膜性良好的大型复杂型面铝合金翻边件。Hole flanging part of aluminum alloy with large complicated profiles by electromagnetic forming is a complex metal forming process coupling electromagnetic field and constructive field. Due to the effects of large complicated profiles, plastic flow behaviors during the forming process are different from traditional flanging forming. A finite element model for hole flanging part of aluminum alloy with large complicated profiles by electromagnetic forming is established based on loose coupling simulation method, and then plastic flow behaviors on condition of one layer flat coil, two layers flat coil and three layer fiat coil are investigated, and subsequently plastic flow rules of flange parts under different pressures are revealed by experiments. The results are as follows： Large complicated profiles are completed closed to female die surfaces on condition of three layer flat coil, flange parts are put into female die and plastic flow phenomenon is more obvious; flange parts are grown to different modes under different pressures, and obvious wrinkling phenomenon for flange parts appear when pressures are less; hole flanging part of aluminum alloy with large complicated profiles more closed to female die surfaces is obtained by controls of reasonable pressures.

关 键 词：大型复杂型面 翻边件 电磁成形 塑性流动 

分 类 号：TG391[金属学及工艺—金属压力加工]