Research progress of double wire welding technology and double wire Tri-Arc welding stability

According to characteristics of the arc and wire feeding form,welding methods with double wire were classified into four categories in this paper,such as double wire with single arc welding,double wire with double arc welding,double wire with double arc welding plus cold wire filling and double wire with coupling arc welding. After briefly introduction of these technical principles and equipment,the research on welding stability of double wire with double arc welding and double wire with coupling arc welding was discussed and summarized. The development direction of double wire welding technology in system control,automation application and further improvement of welding efficiency was prospected,which provided reference for the innovative research and application of double wire arc welding and in-depth study of double wire three arc welding technology.