镁/铝复合管错距旋压成型有限元模拟及分析  

Finite Element Simulation and Analysis of Magnesium/Aluminum Composite Tube with Stagger Spinning

作　　者：石宁 王文先[1] 张婷婷[2] 陈洪胜 SHI Ning;WANG Wenxian;ZHANG Tingting;CHEN Hongsheng(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Advanced Forming and Intelligent Equipment Research Institute,Taiyuan University of Technology,Taiyuan 030024,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]太原理工大学先进成型与智能装备研究院,太原030024 [3]太原理工大学机械与运载工程学院,太原030024

出　　处：《太原理工大学学报》2021年第2期269-273,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金青年项目资助(51805359);中国博士后科学基金面上项目资助项目(2018M631772);山西省自然科学基金(201901D211015);山西省高校创新项目(2019L0333)。

摘　　要：为了探究采用错距旋压制备镁/铝复合管过程中材料的变形行为,以及各工艺参数对复合管成型性的影响规律,采用ABAQUS/Explicit有限元模拟软件建立了AZ31镁合金/6061铝合金错距旋压数值模型,分析了旋压温度、减薄率、进给比等参数对内外管变形协调性的影响。结果表明:提高旋压温度及减薄率有助于提升内管与外管的变形协调性以及成型质量,适当增加进给比有助于提升复合管表面成型精度;旋压温度为350℃时,单道次减薄30%,进给比为1 mm/r时,获得的复合管成型质量良好;界面处应力应变分布结果表明,复合管沿径向方向的等效应力呈现出梯度分布,造成内外管界面处塑性应变不连续,导致内外管变形不协调。通过数值模拟获得了可靠的加工区间,为实际成型提供了理论基础。In order to explore the deformation behavior of materials during the preparation of magnesium/aluminum composite pipes by offset spinning,and the influence of various factors on the formability of composite tubes,in this study,the effects of parameters such as spinning temperature,thickness reduction,and feed ratio on the coordination of deformation of the inner and outer tubes were analyzed by using finite element simulation.The results show that improving spinning temperature and reduction rate is helpful to improve the deformation coordination and forming quality of inner and outer tubes,and increasing the feed ratio appropriately can improve the surface forming precision of composite tubes.When the spinning temperature is 350℃,the reduction is 30%,and the feed ratio is 1 mm/r,the forming quality of the composite tubes is better.The radial equivalent stress of the composite tubes shows a gradient distribution,which causes the discontinuity of the plastic strain of the inner and outer tubes.Reliable machining intervals were obtained through numerical simulation,which provides a theoretical basis for actual forming.

关 键 词：强力旋压 镁/铝复合管材 有限元模拟 变形协调性 

分 类 号：TG306[金属学及工艺—金属压力加工]