Machining cutter device for mold cavity of rotary cavity pipe bending mold

The utility model relates to a tool device for machining a mold cavity of a rotary cavity elbow pipe, and belongs to the technical field of tool devices. The problems that a pipe bending die is low in machining efficiency and high in cost are solved. Comprising a cutter shaft, a small gear, a large gear, a cutter, a rotating shaft, a worm gear, a worm, a driving mechanism and a frame body, the cutter shaft and the rotating shaft are rotationally installed on the frame body in parallel, the small gear is sleeved on the cutter shaft, the large gear is sleeved on the rotating shaft, the small gear is meshed with the large gear, the cutter is installed at the end of the cutter shaft, and the worm gear is installed in the middle of the rotating shaft. The worm is transversely arranged on the frame body in a penetrating mode, the left end of the worm is meshed with the worm gear, and the right end of the worm is connected with the driving mechanism. According to the utility model, the cavity center error is reduced