电辅助5A02薄壁管缩口增厚成形数值模拟与实验研究  

Numerical simulation and experimental study on electric-assisted necking and thickening forming for 5A02 thin-walled tube

作　　者：易宏[1] 徐雪峰[2] 李晓冬 钟光华 YI Hong;XU Xue-feng;LI Xiao-dong;ZHONG Guang-hua(School of Information Engineering,Nanchang Hangkong University,Nanchang 330063,China;School of Aviation Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China;Engineering Training Center,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学信息工程学院,江西南昌330063 [2]南昌航空大学航空制造工程学院,江西南昌330063 [3]南昌航空大学工程训练中心,江西南昌330063

出　　处：《塑性工程学报》2022年第12期27-32,共6页Journal of Plasticity Engineering

基　　金：国家科技重大专项(J2019-VII-0014-0154);国家自然科学基金资助项目(51975267,52265052);江西省重点研发计划(20182ABC28001)。

摘　　要：提出了管坯前端通电、后端冷却的电辅助铝合金薄壁管缩口增厚成形方法,建立了电辅助5A02铝合金薄壁管缩口增厚成形有限元模型。为研究管坯通电预热时间、成形时的温度分布以及电流密度对增厚厚度的影响,进行了多组有限元模拟。模拟结果显示,管坯温度沿轴向递增,电流密度与增厚厚度呈正相关关系,并得到了不同电流密度下对应的成形前预热时间。开展了电辅助5A02铝合金薄壁管缩口增厚成形实验,结果显示,实际温度分布与模拟结果基本相符,提高电流密度可加大增厚厚度,获得了增厚比达280%的5A02铝合金缩口增厚管,实验结果与有限元模拟结果基本相符。An electric-assisted aluminum alloy thin-walled tube necking and thickening forming method with the front end energized and the back end cooled was proposed,and the finite element model of electric-assisted 5A02 aluminum alloy thin-walled tube necking and thickening was established.Groups of finite element simulations were simulated to study the influence of the electrical preheating time for the tubes,the temperature distribution during forming and the current density on thickened thickness.The simulation results show that the temperature of tube blank increases along the axial direction,and there is a positive correlation between current density and thickened thickness.The corresponding preheating time before forming with different current densities is also obtained.Electrical-assisted necking and thickening forming experiments of 5A02 aluminum alloy thin-walled tubes were carried out.The results show that the temperature distribution is consistent with the simulation results.Increasing current density can increase the thickened thickness.5A02 aluminum alloy necked thickened tube with thickening ratio of 280%is formed.The experimental results meet the finite element simulation results well.

关 键 词：电辅助 缩口增厚成形 5A02铝合金 

分 类 号：TG156.7[金属学及工艺—热处理]