Method for grinding and positioning inner ring of third-generation wheel hub bearing

The invention belongs to the technical field of the processing of the bearing ring and provides a method for grinding and positioning the inner ring of a third-generation wheel hub bearing. An electromagnetic centerless clamping tool is used as a tool for processing the inner ring (2) of the wheel hub bearing, which needs to be processed; the length of the inner cavity of an magnetic pole (1) of the electromagnetic centerless clamping tool is made to be greater than the distance from the end surface A of an step-shaped entity shaft of the inner ring (2) of the bearing to the inner end surface F of a flange plate on one end of the inner ring (2) of the bearing; the step-shaped entity shaft of the inner ring (2) of the bearing is arranged in the inner cavity of the magnetic pole (1), the inner end surface F of the flange plate on one end of the inner ring (2) of the bearing is adsorbed and clung to the end surface of an opening end of the magnetic pole (1), and the inner ring (2) of the bearing is positioned; t