等离子-缆式MIG复合焊电弧特性模拟  

Simulation of Arc Characteristics in Plasma Cable-Wire MIG Composite Welding

作　　者：司中祺 张晓鸿 赵娟妮[1] SI Zhongqi;ZHANG Xiaohong;ZHAO Juanni(School of Automotive Engineering,Chengdu Aeronautic Polytechnic,Chengdu 610100,China;Sichuan Aerospace Changzheng Equipment Manufacturing Co.,Ltd.,Chengdu 610100,China)

机构地区：[1]成都航空职业技术学院汽车工程学院,四川成都610100 [2]四川航天长征装备制造有限公司,四川成都610100

出　　处：《电焊机》2025年第3期77-81,共5页Electric Welding Machine

基　　金：成都航空职业技术学院自然科研项目(06211039)。

摘　　要：基于磁流体动力学理论,建立了三维等离子(PAW)+缆式MIG复合焊接电弧数学物理模型,借助Fluent用户自定义函数编程,耦合求解了复合电弧的热场、流场和压力场,得到了PAW+缆式MIG复合焊接电弧热场和流场的特性规律。结果表明,PAW电弧和缆式MIG电弧相互倾斜吸引,耦合效果较好;复合电弧最高温度18500 K,两电弧复合区域间温度保持在10000 K以上,电弧高温区分布广,对工件有效加热半径大,尤其在中厚板打底层和中间填充层可有效减少焊接过程中因焊道填丝热量不足带来的未焊透和咬边等焊接缺陷,验证了PAW+缆式MIG复合电弧焊接加热范围广,熔化效率高的优点。同时,两电弧间形成了电弧压力约80 Pa的复合区域;且PAW+缆式MIG复合电弧的速度云图出现缆式MIG电弧被PAW电弧“吹偏压缩”的不连贯现象。Based on the theory of magnetohydrodynamics,a mathematical and physical model of the three-dimensional plasma-cable type welding wire MIG hybrid welding arc was established.With the help of Fluent user-defined function programming,the thermal field,flow field,and electromagnetic field of the composite arc were coupled and solved,and the characteristic laws of the thermal field and flow field of the plasma cable MIG composite welding arc were obtained.The results indicate that PAW arc and cable MIG arc are inclined and attracted to each other,and the coupling effect is good.The maximum temperature of the composite arc is 18500K,and the temperature in the two arc composite area is above 10000K.The high temperature zone is more widely distributed,and the effective heating radius of the workpiece is larger.This verifies the advantages of PAW+cable MIG composite arc welding,such as a wide heating range and high melting efficiency.At the same time,a composite area with an arc pressure of about 80Pa was formed between the two arcs;And the velocity cloud map of the PAW+cable MIG composite arc shows a discontinuous phenomenon where the cable MIG arc is blown and compressed by the PAW arc.

关 键 词：等离子-缆式MIG 电弧等离子体 温度场 磁流体 

分 类 号：TG444[金属学及工艺—焊接]