Welding tool and welding method suitable for non-concentric workpieces

The invention provides a welding tool and a welding method suitable for non-concentric workpieces, and belongs to the technical field of welding tools.The welding tool suitable for the non-concentric workpieces comprises a rack, a base is arranged on the lower portion of the rack, a ball table is arranged at the upper end of the base, and balls are rotationally installed at the upper end of the ball table; a sliding seat is placed above the balls; a rotating main shaft is mounted at the upper part of the rack, and a positioning tip is arranged at the lower end of the rotating main shaft and is opposite to the sliding seat; the upper portion or the middle of the rotating spindle is in transmission connection with a rotating driving assembly and a lifting driving assembly, the lifting driving assembly can drive the rotating spindle to move up and down relative to the sliding base, and the rotating driving assembly can drive the rotating spindle to rotate. When the welding tool suitable for the non-concentric wo