Study on heat source model in twin-arc GMAW with a common weld pool  

作　　者：赵朋成 王璐璐 刘春廷 黄石生 

机构地区：[1]College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao, 266061 [2]School of Mechanical and Automotive Engineering, South China University of Technology,Guangzhou, 510640

出　　处：《China Welding》2009年第3期7-11,共5页中国焊接（英文版）

基　　金：Supported by National Natural Science Foundation of China （ No. 50575074） and the Scientific Research Foundation of QUST.

摘　　要：The heat input from arcs to weld pool in twin-arc gas metal arc welding （GMAW） with a common weld pool is investigated by high-speed photography. The characteristics of arc shapes and droplet transfer are studied and then the models for heat flux distribution on top surface of weld pool and enthalpy distribution of metal droplets transferred into weld pool are established. By using the model, 3-D geometries of weld pools in twin-arc GMAW with a common weld pool are predicted. Corresponding welding experiments on mild steel plates are carried out and the results indicate that the predicted shape of weld bead on cross section shows good agreement with measured one.The heat input from arcs to weld pool in twin-arc gas metal arc welding （GMAW） with a common weld pool is investigated by high-speed photography. The characteristics of arc shapes and droplet transfer are studied and then the models for heat flux distribution on top surface of weld pool and enthalpy distribution of metal droplets transferred into weld pool are established. By using the model, 3-D geometries of weld pools in twin-arc GMAW with a common weld pool are predicted. Corresponding welding experiments on mild steel plates are carried out and the results indicate that the predicted shape of weld bead on cross section shows good agreement with measured one.

关 键 词：droplet transfer heat source model enthalpy distribution twin-arc GMAW 

分 类 号：TG444.73[金属学及工艺—焊接] TG402