摘要
基于逆向识别结合平板电磁翻边实验建立6063-O铝合金的Johnson-Cook本构和失效判据,对比分析Y型管分离工序电磁翻边与电磁冲孔翻边复合成形两种方式下的电磁力分布、成形过程及变形特征,表明复合成形能成形出更高的支管并提高成形效率,更为有效地改善壁厚周向分布。在此基础上,进行电磁冲孔翻边复合成形实验,获得成形质量良好的Y型接头,探讨放电电压及管坯厚度对支管成形高度、端部壁厚以及贴模间隙的影响,分析成形支管轴向壁厚分布特征与典型缺陷。
Based on the inverse identification and electromagnetic hole-flanging experiment,Johnson-Cook constitutive model and failure criterion of 6063-O aluminum alloy were established.The distribution of electromagnetic force,forming process and deformation characteristics of Y-shaped tube for electromagnetic flanging and piercing-flanging electromagnetic compound forming were compared and analyzed.The results show that the compound forming can obtain higher branch tube and forming efficiency,and improve the circumferential distribution of wall thickness more effectively.On this basis,a series of electromagnetic piercing-flanging compound forming experiments were carried out,and a Y-shaped tube with good quality was obtained.The effects of discharge voltage and initial tube thickness on the forming height,wall thickness and die-fitting gap of the formed branch were discussed.The distribution of wall thickness along the axial direction and typical defects of the formed branch were investigated.
作者
欧冰
黄尚宇
杨梅
钱东升
刘维
OU Bing;HUANG Shang-yu;YANG Mei;QIAN Dong-sheng;LIU Wei(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Engineering Research Center for Green Precision Material Forming,Wuhan University of Technology,Wuhan 430070,China;Shanghai Technician School,Shanghai 200437,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2023年第6期1732-1745,共14页
The Chinese Journal of Nonferrous Metals
基金
国家重点研究发展计划资助项目(2020YFA0714900)。
关键词
6063-O铝合金
本构
Y型管接头
电磁翻边
冲孔翻边复合成形
6063-O aluminum alloy
constitutive model
Y-shaped tube
electromagnetic flanging
piercing-flanging compound forming
