Vehicle frame robot welding system

The utility model provides a car frame robot welding system which comprises a welding track plate and a workpiece track plate, a track moving plate is installed on the surface of the welding track plate in a sliding mode, a steering base is installed on the surface of the track moving plate, a lifting welding mechanical arm is connected to the steering base, and the workpiece track plate is connected with a workpiece. A pushing clamping seat is arranged on the workpiece track plate, a second overturning clamping seat is installed on the pushing clamping seat, a fixed clamping seat is installed on the surface of the workpiece track plate, and a first overturning clamping seat is installed on the side face, close to the pushing clamping seat, of the fixed clamping seat; according to the utility model, the robot automatic welding device is adopted to replace manual welding, so that the welding seam forming and the solution depth are stable, and the welding quality is stable; positioning is carried out through co