Special turning tool for machining train wheel spoke plate

The invention relates to the technical field of spoke plate machining, and discloses a train spoke plate machining special turning tool which comprises a tool bar and a tool body, one end of the tool bar is fixedly connected with a connecting end, one end of the connecting end is fixedly connected with a mounting plate, one side of the mounting plate is provided with a rectangular movable opening, and the inner wall of the rectangular movable opening is slidably connected with an extension plate; the outer wall of one side of the extension plate is fixedly connected with a limiting block; a locking screw rod is rotated under the action of a second knob, so that the locking screw rod rotates on the inner wall of a mounting sleeve, and meanwhile, a locking ring is driven to move towards a cutter body until the locking ring is in contact with the outer wall of one side of the cutter body, and the end part of the mounting sleeve is in contact with the end part of the second knob; and the cutter body can be rapidl