Rotary vane type vacuum pump rotor groove profile machining device

The invention relates to the technical field of polishing, and discloses a rotary-vane vacuum pump rotor groove profile machining device which comprises a bottom plate and an arc-shaped seat, the arc-shaped seat is fixedly installed at the center of the top of the bottom plate, baffles are fixedly installed at the two ends of the arc-shaped seat correspondingly, and the side faces, away from each other, of the two baffles are fixedly provided with a mounting plate and abut against a side plate correspondingly; three-jaw chucks are rotatably mounted on the opposite side faces of the mounting plate and the side plates correspondingly, an L-shaped frame is fixedly mounted at the top of the bottom plate, a U-shaped frame is horizontally arranged between the transverse edge of the L-shaped frame and the arc-shaped base, and an up-down moving mechanism used for moving the U-shaped frame up and down is arranged on the transverse edge of the L-shaped frame. When a rotor is polished, the polishing rods and the three-j