基于SYSWELD的穿孔等离子弧焊接温度场有限元分析  

Finite element analysis of temperature field during keyholeplasma arc welding using SYSWELD software

作　　者：胡庆贤[1] 王艳辉[1] 姚庆军[2] 王顺尧[1] 

机构地区：[1]江苏科技大学江苏省先进焊接技术重点实验室,镇江212003 [2]江苏省特种设备安全监督检验研究院扬州分院,扬州225003

出　　处：《焊接学报》2011年第12期66-69,116,共4页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(51005106);江苏科技大学博士启动基金资助项目(35060902);江苏高校优势学科建设工程资助项目

摘　　要：K-PAW焊接时形成具有"倒喇叭"状的焊缝.根据K-PAW的焊缝形状特点,通过比较多种热源作用模式,得到了适合于K-PAW焊接的组合式体积热源作用模式,即,沿板厚方向,工件的上部采用双椭球体热源,下部为中心轴热流峰值线性递增的圆柱体热源.将"双椭球体+峰值递增圆柱体"组合式热源应用于SYSWELD软件与K-PAW焊接热过程的有限元分析模型,计算了6 mm厚不锈钢板K-PAW焊接温度场以及焊缝形状尺寸,计算与试验结果吻合良好,结果表明了所用热源模式的适用性.Considering the weld geometric characters of keyhole plasma arc welding(K-PAW),a suitable and adaptive combined heat source for numerical simulation is developed,i.e.at the transverse cross-section and along the workpiece thickness direction,the double-ellipsoidal volumetric heat source acts at upper part of the workpiece while a linearly-increased peak value of heat flux in gaussian cylinder mode exerts at lower part of the workpiece.Based on the developed adaptive combined heat source model,the welding temperature field of 6 mm thickness stainless steel is simulated by SYSWELD.The predicted weld geometry and fusion line locus at cross-section are in good agreement with the experimental measurement.This demonstrates the suitability of the combined volumetric heat source mode.

关 键 词：穿孔型等离子弧焊接 温度场 组合式热源 有限元分析 

分 类 号：TG456.2[金属学及工艺—焊接]