摩擦系数对航空铝合金三通管充液成形后壁厚分布的影响  

Influence of friction coefficient on wall thickness distribution after hydroforming for aviation aluminum alloy tee pipe

作　　者：王玲[1] 张建民 孙进[1] 张鹏 郎利辉[3] Wang Ling;Zhang Jianmin;Sun Jin;Zhang Peng;Lang Lihui(Shenyang Aircraft Industry(Group)C o.,L td.,Shenyang 110850,China;Tianjin Tianduan Aviation Technology Co.,Ltd.,Tianjin 300143,China;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China)

机构地区：[1]沈阳飞机工业(集团)有限公司,辽宁沈阳110850 [2]天津天锻航空科技有限公司,天津300143 [3]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《锻压技术》2021年第4期101-105,共5页Forging & Stamping Technology

摘　　要：在铝合金三通管的充液成形过程中,摩擦系数是影响其壁厚分布及支管高度的关键因素之一。通过建立三通管充液成形的有限元模型,在固定的充液压力、轴向进给参数下,采用有限元分析方法对三通管在充液成形中摩擦系数对壁厚的影响进行模拟分析,获得了摩擦系数对三通管成形壁厚的影响规律,得出摩擦系数为0.075时既能保证支管较小的减薄率,又能获得较好的壁厚分布的结论。同时,通过摩擦磨损试验机获得了不同润滑介质对应的摩擦系数,最终选取了一种摩擦系数接近0.075的润滑介质进行实际胀形验证,获得了满足壁厚及减薄要求的航空铝合金三通管件,可为三通管零件的充液成形提供一些理论指导。In the hydroforming process of aluminum alloy tee pipe,the friction coefficient is one of the key factors affecting its wall thickness distribution and branch pipe height.Therefore,by establishing the finite element model for hydroforming of tee pipe,under the fixed filling pressure and axial feeding parameters,the influence of friction coefficient on the wall thickness of tee pipe in the hydroforming process was simulated and analyzed by the finite element analysis method,and the influence law of friction coefficient on the forming wall thickness of tee pipe was obtained.The results show that when the friction coefficient is 0.075,the thinning rate of branch pipe is smaller,and the wall thickness distribution is better.At the same time,the friction coefficients corresponding to different lubricating media are obtained by the friction and wear testing machine.Finally,a lubricating media with the friction coefficient close to 0.075 is selected for actual bulging verification,and the aviation aluminum alloy tee pipe meeting the requirements of wall thickness and thinning is obtained to provide some theoretical guidance for tee pipe hydroforming.

关 键 词：摩擦系数 铝合金 壁厚 三通管 充液成形 

分 类 号：TG394[金属学及工艺—金属压力加工]