Steel plate butt-welded bend longitudinal seam automatic welding equipment

The utility model relates to an automatic welding device for steel-plate butt-welding elbow longitudinal-joint, comprising a welding manipulator and a welding positioner; wherein, the welding manipulator and the welding positioner match to realize automatic welding of elbow longitudinal-joint; the welding manipulator comprises an upright column and a crossarm; a welding headstock is positioned at the front end of the crossarm; the welding positioner comprises two positioner upright columns and a beam; a turntable for fixing, clamping and rotating the elbow is positioned on the beam; and the welding positioner is used to clamp and rotate the elbow according to the welding speed and to match with the manipulator and the welding headstock hung on the end of the beam so as to make the weld joint of the elbow longitudinal-joint at the most horizontal welding position all the time, thus realizing the mechanical and automatic welding of the pipe-fitting weld-joint. The automatic welding device has the advantages of improving welding productivity, reducing labor intensity of the worker and efficiently ensuring weld-joint quality.