摘要
采用Dynaform有限元软件建立三通管液压成形CAE分析模型,研究液压成形过程中的金属流动规律,发现管端两侧金属材料运动最为剧烈,含支管侧上半部管坯材料轴向运动位移较大,离管件中心越近直管底部材料轴向运动位移越小。针对液压成形中三通管壁厚不均问题,提出利用几何映射设计并优化的斜口管坯,采用有限元模拟及实验验证方法对尺寸为Φ45 mm×28 mm,厚为1.5 mm的5052铝合金管材成形性进行验证。结果表明:与传统管坯设计相比,优化的斜口管坯由于接触面积减小,从而使摩擦减小,改善了材料的流动性,使得成形件最大增厚率由40%降低到26%,壁厚均匀性明显提高。
The CAE analysis model of T-shaped tube hydroforming was established by using Dynaform finite element software,and the metal flow law during the hydroforming process was studied.It was found that the materials flow on both sides of the tube end is the most intense,and the axial displacement of the blank material on the upper half of the tube side with branch tube is larger.Be-sides,the axial displacement of the material on the bottom of the straight tube is smaller as it is closer to the center of the tube.To improve the wall thickness uniformity in the T-shaped tube hydroforming process,a new inclined tube blank was designed and opti-mized by geometric mapping;the formability of 5052 aluminum alloy tube with size ofΦ45 mm×28 mm and thickness of 1.5 mm was verified by finite element simulation and experimental verification method.The results show that compared with the traditional blank design,the optimized inclined tube blank has less contact area,which reduces the friction and improves the material fluidity.As the result,the maximum increasing thickness rate of forming parts is reduced from 40%to 26%,and the uniformity of wall thickness is significantly improved.
作者
华如雨
徐雪峰
邱泽宇
肖尧
戴龙飞
袁聪聪
熊光利
HUA Ru-yu;XU Xue-feng;QIU Ze-yu;XIAO Yao;DAI Long-fei;YUAN Cong-cong;XIONG Guang-li(School of Aviation Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China;AVIC Hongdu Aviation Industry Group,Nanchang 330024,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2019年第4期61-68,共8页
Journal of Plasticity Engineering
基金
江西省重点研发计划资助项目(20165ABC28002)
关键词
壁厚均匀性
5052铝合金
三通管液压成形
管坯设计
有限元模拟
wall thickness uniformity
5052 aluminum alloy
T-shaped tube hydroforming
tube blank design
finite element simulation
