Welding device for sheet metal parts

The utility model discloses a welding device for sheet metal parts, which belongs to the technical field of sheet metal part welding and comprises a base, supporting plates are fixedly connected to two sides of the upper end of the base, a sliding plate is arranged between the two supporting plates, and a supporting rod is fixedly connected to the upper end between the two supporting plates. Electric push rods are arranged on the two sides of the interior of the supporting rod; a connecting column is arranged on one side of the electric push rod, welding rods are arranged in the connecting column, the number of the welding rods is two, a connecting mechanism is arranged between the two welding rods, the connecting mechanism comprises the connecting column, a connecting plate, a fixing plate and a penetrating hole, the penetrating hole is formed in the connecting plate, and the fixing plate is fixedly connected to one side face of the connecting plate. The connecting column is fixedly connected with the upper