6063铝/20钢管磁脉冲胀形连接工艺研究  

Research on Magnetic Pulse Expansion Joining of 6063 Aluminum/Steel 20 Tubes

作　　者：范治松 李宁 徐立凯 邓将华[1] FAN Zhisong;LI Ning;XU Likai;DENG Jianghua(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou,350116)

机构地区：[1]福州大学机械工程及自动化学院,福州350116

出　　处：《中国机械工程》2024年第12期2185-2192,共8页China Mechanical Engineering

基　　金：福建省自然科学基金(2022J01070,2020J02026);福州大学贵重仪器设备开放测试基金(2024T018)。

摘　　要：为探究带集磁器结构的异种金属管材磁脉冲胀形连接新方法,分析了集磁器条件下电磁力分布和铝管的胀形连接行为规律,通过连接接头拉脱实验,研究了主要工艺参数对磁脉冲胀形连接效果的影响。结果表明:集磁器显著提高了铝管胀形区电磁力,铝管与集磁器工作区的搭接长度对铝管胀形变形影响较大,当搭接长度为集磁器工作区长度的1.5倍时,获得了最大的有效接触面积;在外管仅发生弹性变形时,碰撞压力与放电电压呈正相关,接头抗拉脱载荷随放电电压增大而增大;在相同条件下,接头抗拉脱载荷随着径向间隙的增大呈现出先增大后减小的变化趋势,当放电电压为17 kV、径向间隙为4.0 mm、搭接长度为15 mm时,接头抗拉脱载荷最大,达到5021 N。To explore a novel method of magnetic pulse expansion joining for dissimilar metal tubes with a magnetic field shaper structure,the distributions of electromagnetic forces were analyzed under the conditions of magnetic field shaper and the bulging behavior of aluminum tubes.The influences of main processing parameters on the magnetic pulse expansion joints were investigated through pull-out experiments.The results show that the magnetic field shaper significantly increases the value of electromagnetic forces applied to the bulging areas of the aluminum tubes.The overlapping length between the aluminum tube and the working zone of the magnetic field shaper has a significant impact on the bulging deformations of the aluminum tubes.When the overlapping length is 1.5 times the length of the working zone of the magnetic field shaper,the maximum effective contact area is obtained.Under the conditions of only elastic deformations of the outer tubes,the collision pressures are positively correlated with the discharge voltages,and the peak pull-out loads of the joints increase with the increase of discharge voltages.As the radial clearances between the tubes increase,the peak pull-out loads of the joints show a trend of increasing and then decreasing while the other processing parameters remaining the same.The maximum pull-out load of the joints reaches 5021 N under the condition of discharge voltage of 17 kV,radial gap of 4.0 mm,and overlap length of 15 mm.

关 键 词：磁脉冲胀形连接 集磁器 6063铝合金 拉脱载荷 数值模拟 

分 类 号：TG391[金属学及工艺—金属压力加工]