Method for producing track ring member, method for producing rolling bearing, method for producing hub unit bearing, and method for producing vehicle
AssigneeNsk Ltd.
InventorHidekazu Suzuki
Life of this patent
Estimating the term…
Abstract
A centerless grinding processing in which a sliding contact surface (10) is subjected to grinding by pressing a grindstone against the sliding contact surface (10) of an inner ring (3) while rotating the inner ring (3) relative to the grindstone in a prescribed direction, and then, in the centerless grinding process, a finishing step in which grinding lines in a direction intersecting grinding lines formed on the sliding contact surface (10) are formed on the sliding contact surface (10) and/or processing for improving the surface roughness of the sliding contact surface (10) is performed is performed.
Claims11
A method for producing a track ring member having a sliding contact surface with which a distal end portion of a seal lip is in contact in a slidable manner over an entire circumference, the method comprising:
- performing a centerless grinding so that the sliding contact surface is subjected to grinding by pressing a grindstone against the sliding contact surface while rotating the track ring member relative to the grindstone in a prescribed direction;
- and
- performing a finishing process, after the performance of the centerless grinding, by subjecting the sliding contact surface of the track ring member to a process of eliminating directivity of surface roughness, which is generated on the sliding contact surface by grains used in the centerless grinding,
- wherein the finishing process comprises forming grinding lines in irregular directions on an area including the sliding contact surface of the track ring member by using an abrasive grain containing brush, a non-woven fabric abrasive, or a polishing tape so that an uneven shape of the sliding contact surface, which has the directivity of surface roughness, becomes complicated.
A method for producing a hub unit bearing using centerless grinding in which the hub unit bearing has an outer ring, a hub, a plurality of rolling elements, a seal lip, and a sliding contact surface which is provided on the outer ring or the hub and with which a distal end of the seal lip is in contact in a slidable manner, the method comprising:
- performing a centerless grinding so that the sliding contact surface is subjected to grinding by pressing a grindstone against the sliding contact surface while rotating the outer ring or the hub relative to the grindstone in a prescribed direction;
- performing a finishing process, after the performance of the centerless grinding, by subjecting the sliding contact surface of the outer ring or the hub to a process of eliminating directivity of surface roughness, which is generated on the sliding contact surface by grains used in the centerless grinding;
- and
- assembling the hub unit bearing using the outer ring, the hub, the plurality of rolling elements, and the seal lip,
- wherein the finishing process comprises forming grinding lines in irregular directions on an area including the sliding contact surface by using an abrasive grain-containing brush, a non-woven fabric abrasive, or a polishing tape so that an uneven shape of the sliding contact surface, which has directivity or surface roughness, becomes complicated.
Dependencies are inferred from the claim text.