WELDING DEVICE

This welding device of multiple embodiments comprises: a rotating table upon which two atypically-shaped plates are fixed in an overlapping state; a torch unit having a welding torch arranged at a position facing an outer circumferential edge of the two atypically-shaped plates fixed to the rotating table; a torch drive unit that advances and retracts the welding torch towards and away from the outer circumferential edges; an after-shield unit provided on the welding torch, at a position further on the downstream side in the rotation direction of the rotating table than the welding torch, andhaving a plurality of nozzles that are arranged lined up in the rotation direction, spray shield gas towards the outer circumferential edges, and include a first nozzle positioned on the upstream sidein the rotation direction and a second nozzle positioned further on the downstream side in the rotation direction than the first nozzle; and a control unit that controls the orientation of the nozzles so as to be facing a dir