Positioning and clamping device for hub polishing

The positioning and clamping device comprises a bottom plate, a motor is arranged on the bottom plate, a worm is arranged at one end of the motor, supporting frames are arranged at the two ends of the worm, a rotating shaft of the motor is connected with the worm, a rotating piece is arranged on one side of the motor, a driven wheel is arranged on the outer side of the bottom of the rotating piece in a sleeved mode, and the driven wheel is connected with the supporting frames. The driven wheel is meshed with the worm, and a supporting plate is arranged on the rotating piece. The hub polishing device has the beneficial effects that no gap is generated in the polishing work, the fitting degree is higher, the inner circle of a hub cannot be scratched, and the lifting assembly is matched with the first rotating rod, so that the bottom plate can be controlled to rise, the bottom plate can be controlled to drive the hub to carry out angle adjustment of 0-90 degrees, the hub can face a worker, and the polishing effi