Clamp for hub bearing machining

The invention belongs to the technical field of clamping, and particularly relates to a hub bearing machining clamp which comprises a workbench. First motors are fixedly connected to the positions, located on the two sides of the workbench, of the upper surface of the workbench. Rotating shafts of the two first motors are fixedly connected with lead screws; a driving disc is arranged above the workbench; the middle part of the driving disc is rotationally connected with a lower clamping seat; a placing groove is formed in the inner wall of the lower clamping seat; a locking disc is arranged above the lower clamping seat; through holes which are uniformly distributed are formed in the locking disc in the circumferential direction; the surface of the outer ring of the locking disc is fixedly connected with an auxiliary ring; mounting blocks are fixedly connected to the left side and the right side of the auxiliary ring; a first annular groove is formed in the position, located in the lower clamping base, below