Research on equipment and technology of GMAW-G thick wire welding

Construction welding structure develops to the direction of large scale,heavy duty and high parameter precision,and manual welding operation has low efficiency and instability welding quality.Therefore,GMAW-G thick wire technology is developed.This paper elaborates the whole process of GMAW-G thick wire welding in three aspects of welding power source,materials and technology test,and makes an assessment of technology test.The test shows that GMAW-G thick wire welding can obtain qualified weld,and has many advantages such as high efficiency,energy saving,small deformation of weld,simply operation,easy control and so on.It should be popularized and applied in welding of construction steel structure.