Machining, positioning and welding mechanism

The utility model relates to a machining, positioning and welding mechanism which comprises a working box, a protective frame is fixed on the upper surface of the working box, the protective frame is arranged on the working box, the protective frame is provided with a placing plate, and a clamping mechanism is arranged on the placing plate. The protection frame comprises a first motor fixed to the left side of the working box, a first rotating rod is fixed to an output shaft of the first motor, two worm barrels are fixed to the left side and the right side of the outer surface of the first rotating rod, and the protection frame further comprises two second rotating rods rotationally connected to the left end and the right end of the inner top wall of the working box. Worm wheels are fixed to the bottoms of the outer surfaces of the second rotating rods. According to the machining, positioning and welding mechanism, the position of an automobile part can be fixed through the clamping mechanism according to the