Friction stir welding device for improving welding quality and using method thereof

The invention belongs to the technical field of welding, and particularly relates to a friction stir welding device for improving welding quality and a using method thereof.The friction stir welding device comprises a driving push rod, a fixing support, a rail sleeve, a sliding rail, a roller support, a roller center shaft, a roller and a main shaft, the fixing support is installed on the outer side of the main shaft, and the driving push rod and the rail sleeve are installed on the fixing support; a sliding rail is slidably limited in the rail sleeve, the movable end of the driving push rod is connected with the upper end of the sliding rail, a roller support is installed at the lower end of the sliding rail, and a roller is rotationally supported at the end, away from the sliding rail, of the roller support through a roller center shaft. The welding device is reasonable in structural design, the fixing supports, the rail sleeves, the sliding rails, the rolling wheel supports, the rolling wheel center shafts