Numerical Simulation of Electromagnetic Force in Double-Sided Arc Welding Process

查看全文 作　　者：Hongming GAO Lin WU Honggang [1]DONG 机构地区：[1]State Key Lab. of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China State Key Lab. of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China State Key Lab. of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China 出　　处：《Journal of Materials Science & Technology》索引2003年第19卷第z1期,共2页 摘　　要：Up till now, most of the researchers believe that there are four kinds of forces in the weld pool convection, they aresurface tension, electromagnetic force, buoyancy and gas shear stress. So electromagnetic force is very important,especially when large current is applied. In most of previous models, the electromagnetic force is calculated analytically,in which only the axial component of current is considered. Actually the radial component of current has thesame effect, and may be advanced in some locations. In double-sided arc welding process, instead of the earthclamp, another torch is placed on the opposite side; the current will go from one torch, through the weld zone,to another torch. In this case, the current is more concentrated in the weld zone; the electromagnetic force willhave significant effect compared with conventional welding process. In this paper, a new method of numericalcalculation for electromagnetic force is developed, in which both axial and radial components are considered. And asan example, the distribution of electromagnetic force in double-sided arc welding is calculated. It demonstrates thatthis new method could give more accurate simulation of electromagnetic force, and is close to the actual process. 关 键 词：ELECTROMAGNETIC force, NUMERICAL simulation, Double-sided ARC WELDING PROCESS