Welding robot for refrigeration water tank

The invention discloses a welding robot for a refrigeration water tank, and belongs to the technical field of welding. The welding robot comprises a supporting piece, a welding arm is arranged on the supporting piece, an overturning piece is rotatably arranged on the supporting piece, a positioning mechanism is arranged on the overturning piece, and the positioning mechanism comprises first positioning seats which are symmetrically arranged; the first positioning seats are provided with first positioning pieces for positioning water tank side plates, the tops of the first positioning seats are provided with first fixing pieces for fixing the water tank side plates, the water tank side plates and water tank end plates for welding a water tank are spliced through the positioning mechanism, and clamping seats are clamped on the side faces of the water tank side plates through first supporting mechanisms; and the water tank side plates and the water tank end plates are supported by the first supporting mechanisms