锻压技术

铝合金管坯电液成形试验研究

英文标题：Experimental investigation on electrohydraulic forming of aluminum alloy tube

作者：于海平孙立超张旭李春峰

分类号：TG391

出版年,卷(期):页码：2016,41(3):37-43

摘要：

电液成形是利用水中高压脉冲放电产生的冲击波使坯料发生高速率变形的塑性加工方法。基于柱面凹模进行5A02铝合金管坯电液成形试验，分析电压和金属丝直径对变形的影响；针对一步成形圆角变形区难以贴模现象，进行两步胀形试验。研究结果表明，变形量随放电电压升高而增大，在给定放电电压条件下，存在一个临界金属丝直径对应成形效果最佳，而临界金属丝直径随放电电压提高而增大。管坯变形总体上处于双向拉伸应变状态，其中变形区中间为近平面应变状态，靠近圆角区为近双等拉应变状态。相对于一步成形，在圆角区，两步电液成形接近完全贴模，壁厚分布相对均匀。

Electrohydraulic forming (EHF) is a high-rate plastic deformation technology, which makes the sheet metal to form at a high speed by the shockwave generated from high voltage discharge under water. The experimental investigation on EHF of aluminum alloy 5A02 tube was performed by the cylindrical die, and the influences of discharge voltage and wire diameter on EHF were analyzed. Furthermore, the experiments of two-step EHF process were explored to avoid inadequate deformation in the corner by one-step process. The results show that the deformation increases with the rise of high voltage, and there is a critical wire diameter corresponding to the maximum deformation under a constant discharge voltage. The critical wire diameter increases with the rise of voltage. The deformed tube is in a biaxial tension strain state after EHF. However, the middle of deformation zone reaches a plane strain state, and the region near the inner corner of the deformation zone is close to a biaxial equal tension strain state. In contrast to the filleted corner caused by one-step EHF process, the one by two-step is in the almost full attaching-die condition and the thickness of deformed tube wall is relatively uniform.

基金项目：

国家自然科学基金资助项目(51475122)；国家重点基础研究计划资助项目课题(2011CB012805)；中央高校基本科研业务费专项资金资助项目（HIT.NSRIF.12006）

于海平（1974-），男，博士，副教授,博士生导师

参考文献：

［1］李春峰. 高能率成形技术[M]. 北京:国防工业出版社，2001.Li C F. High Energy Rate Forming[M]. Beijing: National Defense Industry press, 2001.
［2］Gillard A J, Golovashchenko S F, Mamutov A V. Effect of quasi-static prestrain on the formability of dual phase steels in electrohydraulic forming[J]. Journal of Manufacturing Processes, 2013, 15(2): 201-218.
［3］Golovashchenko S F, Gillard A J, Mamutov A V, et al. Electrohydraulic trimming of advanced and ultra high strength steels[J]. Journal of Materials Processing Technology, 2014, 214(4): 1027-1043.
［4］Golovashchenko S F, Gillard A J, Mamutov A V. Formability of dual phase steels in electrohydraulic forming[J]. Journal of Materials Processing Technology, 2013, 213(7): 1191-1212.
［5］Golovashchenko S F, Bessonov N M, Ilinich A M. Two-step method of forming complex shapes from sheet metal[J]. Journal of Materials Processing Technology, 2011, 211(5): 875-885.
［6］Rohatgi A, Stephens E V, Davies R W, et al. Electro-hydraulic forming of sheet metals: Free-forming vs. conical-die forming[J]. Journal of Materials Processing Technology, 2012, 212(5): 1070-1079.
［7］Rohatgi A, Stephens E V, Soulami A, et al. Experimental characterization of sheet metal deformation during electro-hydraulic forming[J]. Journal of Materials Processing Technology, 2011, 211(11): 1824-1833.
［8］Kim S B, Huh H, Bok H H, et al. Forming limit diagram of auto-body steel sheets for high-speed sheet metal forming[J]. Journal of Materials Processing Technology, 2011, 211(5): 851-862.
［9］Gillard A J, Golovashchenko S F, Mamutov A V. Effect of quasi-static prestrain on the formability of dual phase steels in electrohydraulic forming[J]. Journal of Manufacturing Processes, 2013, 15(2): 201-218.
［10］陆辛, 张立斌, 杨鲁义, 等. 电液线爆成形工艺[J]. 锻压技术, 2002, 27 (2): 34-35.Lu X, Zhang L B, Yang L Y, et al. Electro-hydro wire exploding forming technology[J]. Forging & Stamping Technology, 2002, 27 (2): 34-35.
［11］陆辛, 海锦涛, 杨鲁义, 等. 电液成形工艺实验研究[J]. 锻压技术, 2002, 27(3): 29-31.Lu X, Hai J T, Yang L Y, et al. Experimental study of electrohydraulic forming technology[J]. Forging & Stamping Technology, 2002, 27(3): 29-31.
［12］邓琦林, 刘宏军, 周锦进. 液电成形金属零件的实验研究[J]. 航空精密制造技术,1999,35 (4):15-17.Deng Q L, Liu H J, Zhou J J. Experimental research on electrohydraulic forming of metal parts[J]. Aviation Precission Manufacturing Technology, 1999,35 (4):15-17.
［13］张赞阁, 庞桂兵, 卜繁岭, 等. 液电成形技术研究进展[A]. 第15届全国特种加工学术会议论文集(下)[C]. 苏州, 2013.Zhang Z G, Pang G B, Pu F L, et al. Advances in study of electrohydraulic forming technology[A]. Proceedings of the Fifteenth National Conference on Non-tranditional Machining (2nd set) [C]. Suzhou, 2013.
［14］孙立超. 5052铝合金管材电液成形工艺试验研究[D]. 哈尔滨：哈尔滨工业大学, 2015.Sun L C. Experimental Investigation on Electrohydraulic Forming of 5052 Aluminum Alloy Tube[D]. Harbin: Harbin Institute of Technology, 2015.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】