Frame longitudinal beam welding mechanism

The utility model discloses a frame longitudinal beam welding mechanism which comprises a door-shaped frame, an automatic lifting air cylinder, a welding device and a welding controller, the door-shaped frame is installed on a welding workbench in a sliding mode, the automatic lifting air cylinder is installed on the door-shaped frame, a supporting plate is installed on the automatic lifting air cylinder, and the welding device is installed on the supporting plate. The welding device and the welding controller are installed on the supporting plate, and the welding controller is connected with the welding device and controls the welding device to conduct welding operation. According to the frame longitudinal beam welding mechanism, the requirement for multi-size production of rigid frame longitudinal beams is met, the welding duration is shortened, the welding quality is improved, welding deformation is effectively controlled, and the automatic welding degree and the production efficiency are improved by being