Welding device for underwater friction stir welding

The utility model relates to a welding device for underwater friction stir welding, which belongs to the technical field of underwater welding and comprises a water tank, a water inlet is arranged at one end of the water tank, a water inlet pipe is arranged at the water inlet, a water outlet is arranged at the other end of the water tank, and a water outlet pipe is arranged at the water outlet. A welding base plate and a clamp used for fixing a workpiece to be welded are arranged on the inner side of the bottom of the water tank, and a hydrogen collecting device is arranged above the welding base plate and used for collecting hydrogen generated in the welding process so as to eliminate the influence of the hydrogen on a welding seam. According to the utility model, the hydrogen collecting device is arranged above the welding base plate, so that not only is the influence of hydrogen on the quality of a welding seam solved, but also waste gas generated in the welding process can be reused. 本实用新型涉及一种用于水下搅拌摩擦焊的焊接