Welding tool with cooling structure

The invention relates to a welding tool with a cooling structure. The welding tool comprises a pedestal; a welding support column and a welding seat are installed on the pedestal. A side clamp plate is installed at the side of the welding seat; a first positioning plate and a second positioning plate are installed on the upper end surface; a horizontal transverse plate is clamped longitudinally between the first positioning plate and the side clamp plate; and the horizontal position of the horizontal transverse plate is limited by the second positioning plate. Besides, a placing groove for placing a lower folding part of a bending arc plate is formed in the pedestal; clamping space for clamping the upper folding part is formed between the welding seat and the side surface of the welding support column; and the welding part of the bending arc plate is placed on the upper end surface of the welding support column horizontally and is in contact with the horizontal transverse plate. An elastic positioning structure is installed between the side clamp plate and the welding seat and includes an abutting pressing plate; one end of the abutting pressing plate is abutted against the bending folding part of the bending arc plate; an end spring is installed between the other end of the abutting pressing plate and the welding seat; and the end portion of the end spring is abutted against a fixed shot column of the welding seat.