Frame welding, fixing and pressing device

The utility model relates to the technical field of welding clamps, and discloses a frame welding, fixing and pressing device which comprises a rack, conveying assemblies are arranged on the two sides of the rack, a supporting frame body is arranged in the rack, a telescopic air cylinder is arranged on the supporting frame body, the output end of the telescopic air cylinder is connected with a pressing table, and the output end of the pressing table is connected with a clamping device. The pressing table is connected to the end of the supporting frame body through a guide assembly, an avoiding through hole is formed in the center of the pressing table, the pressing table is fixedly connected with a pressing plate on the periphery of the avoiding through hole, the pressing table is provided with a plurality of pneumatic clamps on the inner side of the pressing plate, and the pneumatic clamps are fixedly connected with the pressing plate. According to the frame welding device, large-batch welding machining is f