Blade type power battery tray cross beam welding tool

A blade type power battery tray cross beam welding tool is characterized in that a portal frame is arranged at the center line above a rack, downward pressing hydraulic cylinders are arranged on the two sides above the portal frame, piston rods of the downward pressing hydraulic cylinders are downwards connected with a downward pressing beam, and a cross beam clamping mechanism is arranged on the downward pressing beam; a plurality of rollers are arranged on the two sides of the portal frame on the rack, and the rollers can be jacked up and down through roller air cylinders fixed to a cross beam of the rack; and a plurality of cushion blocks are arranged on the portal frame rack. According to the utility model, a series of actions of pulling and supporting the battery tray, lowering and embedding the cross beam and resisting deformation can be automatically realized. According to the principle, before beam welding is conducted, the battery tray is tensioned, positioned and placed into a beam to be pressed int