基于脉冲电磁力作用的铝合金板材成形试验研究  

Experimental research on aluminum alloy sheet forming using pulsed electromagnetic force

作　　者：方春平 尤洁[1] 凌丽[1] 周翔[1] 王文平[2] FANG Chun-ping;YOU Jie;LING Li;ZHOU Xiang;WANG Wen-ping(Aerospace Research Institute of Material&Processing Technology,Beijing,100076;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191)

机构地区：[1]航天材料及工艺研究所,北京100076 [2]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《塑性工程学报》2020年第8期39-43,共5页Journal of Plasticity Engineering

基　　金：国家重点基础研究发展计划(973项目)(2011CB012804)。

摘　　要：为了解决小曲率、大尺寸航空航天结构件的成形问题,结合柔性多点模具,基于电磁成形原理,提出一种直接将电磁脉冲载荷渐进式局部加载在板料上实现铝合金板材整体成形的工艺方法。基于2524-T3铝合金板进行试验研究,使用抛物线对脉冲电磁力作用下板材的曲率形状进行拟合分析,研究了加载间距和电压对工件变形曲率的影响规律。结果表明:脉冲电磁力成形工艺可以实现抛物面形工件的成形;工件变形曲率随电磁力加载间距的减小而增大,加载间距减小至20 mm时,工件曲率趋于饱和,1.6 mm厚工件的极限曲率半径约为2200 mm,工件的极限曲率随电压的增大而增大。To solve the forming problem of the small-curvature and large-size aerospace component,a sheet metal forming technology of aluminum alloy combining with flexible multi-point die was proposed based on the principle of electromagnetic forming. In the process,the electromagnetic pulse load was locally applied on the sheet in incremental forming to form the integral panel. On the basis of experimental investigations on 2524-T3 aluminum alloy sheet,the curvature shape of plate under the pulsed electromagnetic force was fitted and analyzed by the parabolic curve. The effect laws of loading spacing and voltage on deformation curvature of workpiece were investigated. The results show that the pulse electromagnetic forming is feasible to realize parabolic shaped workpiece forming. The deformation curvature of workpiece increases with the decrease of the electromagnetic force loading spacing. When loading spacing reduces to 20 mm,curvature of workpiece tends to saturation,and the ultimate curvature radius of workpiece with thickness of 1. 6 mm is about 2200 mm. The ultimate curvature increases with the increase of voltage.

关 键 词：2524-T3铝合金 脉冲电磁力 加载间距 加载电压 曲率 

分 类 号：V262.4[航空宇航科学与技术—航空宇航制造工程]