Numerical simulation of temperature field in plasma-arc flexible forming of laminated-composite metal sheets  

作　　者：宋文庆 徐文骥 王续跃 孟建兵 李洪友 

机构地区：[1]School of Mechanical Engineering,Dalian University of Technology [2]College of Mechanical Engineering and Automat ion,Huaqiao University

出　　处：《中国有色金属学会会刊：英文版》2009年第B09期61-67,共7页Transactions of Nonferrous Metals Society of China

基　　金：Projects(50775019,50675072) supported by the National Natural Science Foundation of China;Project(20062178) supported by the Natural Science Foundation of Liaoning Province,China

摘　　要：Flexible forming of laminated-composite metal sheets (LCMS) using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable temperature field is the key during the forming process, a three-layer FEM model, based on the characteristics along LCMS thickness direction, was developed to study the variation rules of temperature field, which was verified robustness by experimental validation. Besides, the influences of process parameters such as plasma arc power, scanning speed and plasma arc diameter on LCMS temperature field were performed. The comparisons of LCMS with single layer metal sheet (SLMS) show the temperature difference of LCMS along thickness direction is smaller than that of SLMS, but the heat-affected zone of LCMS along X axis is wider than that of SLMS under the same process parameters.Flexible forming of laminated-composite metal sheets （LCMS） using plasma arc is a latest technique, which produces LCMS components by thermal stress without mould and external force. Considering that the controllable temperature field is the key during the forming process, a three-layer FEM model, based on the characteristics along LCMS thickness direction, was developed to study the variation rules of temperature field, which was verified robustness by experimental validation. Besides, the influences of process parameters such as plasma arc power, scanning speed and plasma arc diameter on LCMS temperature field were performed. The comparisons of LCMS with single layer metal sheet （SLMS） show the temperature difference of LCMS along thickness direction is smaller than that of SLMS, but the heat-affected zone of LCMS along X axis is wider than that of SLMS under the same process parameters.

关 键 词：电弧温度场 复合金属 弹性夹层 数值模拟 内容管理系统 板成形 血浆 等离子弧 

分 类 号：TG664[金属学及工艺—金属切削加工及机床]