基于区域润滑的Y型管内高压成形壁厚分布优化  

Optimization of wall thickness distribution of Y-shaped tube in hydroforming based on area lubrication

作　　者：张举 徐雪峰[2] 肖尧 范玉斌 肖洁 ZHANG Ju;XU Xue-feng;XIAO Yao;FAN Yu-bin;XIAO Jie(National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,China;School of Aviation Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学轻合金加工科学与技术国防重点学科实验室,江西南昌330063 [2]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《塑性工程学报》2021年第9期73-79,共7页Journal of Plasticity Engineering

基　　金：轻合金加工科学与技术国防重点学科实验室开放课题研究基金资助项目(EG201903452)。

摘　　要：在Y型管内高压成形过程中,摩擦因素对其壁厚分布的影响较大。利用DYNAFORM软件模拟了不同摩擦系数下Y型管的成形过程,分析了Y型管的壁厚分布情况和成形质量。然后模拟了在薄膜全管坯润滑和区域润滑两种不同方式下Y型管的成形过程,通过壁厚分布图分析比较了两种润滑方式下的成形结果,并通过实验验证了模拟结果。结果表明,摩擦系数较小时,成形后的Y型管壁厚分布比较均匀;摩擦系数较大时,Y型管成形质量较差。同时,薄膜全管坯润滑实际成形率较低,而区域润滑可以有效降低主管处的增厚率,对改善Y型管壁厚分布具有很好的优化作用。During the hydroforming process of Y-shaped tube,the influence of friction factor on the distribution of wall thickness is larger. The forming process of Y-shaped tube with different friction coefficients was simulated using DYNAFORM software,and the wall thickness distribution and forming quality of Y-shaped tube were analyzed. Then,the forming process of Y-shaped tube was simulated with two different ways of film full-tube billet lubrication and area lubrication,and the forming results with the two lubrication ways were analyzed and compared by the wall thickness distribution diagrams,and the simulation results were verified by experiments. The results show that when the friction coefficient is small,the wall thickness distribution of formed Y-shaped tube is relatively uniform;when the friction coefficient is large,the forming quality of Y-shaped tube is poor. At the same time,the actual forming rate of film full-tube billet lubrication is low,while area lubrication can effectively reduce the thickening rate at the main tube,and has a good optimization effect on improving the wall thickness distribution of Y-shaped tube.

关 键 词：Y型管 内高压成形 区域润滑 壁厚优化 

分 类 号：TG386[金属学及工艺—金属压力加工]