Method of processing antifriction bearing unit for wheel
A method of processing an antifriction bearing unit for a wheel, the antifriction bearing unit including an outer race, an inner race, a plurality of rolling elements and a flange portion for directly or indirectly mounting a brake disk provided to one of the outer and inner races, the method includes: assembling the outer and inner races and the rolling element together; after assembling, placing the one of the outer and inner race in position incapably of circumferential rotation; grinding the flange portion by bring the flange portion into contact with a grindstone which is rotated while the other of the outer and inner race is left free.
1. An apparatus for processing an antifriction bearing unit for a wheel, the antifriction bearing unit including an outer race, an inner race, a plurality of rolling elements, a first flange portion for directly or indirectly mounting a brake disk provided to one of the outer and inner races, and a bolt that passes through the first flange portion, the apparatus comprising:
a fixing table that mounts the one of outer and inner races and is adapted to rotate;
a grindstone that is provided to the fixing table and is adapted to grind the first flange portion in a state that the one of outer and inner races is mounted on the fixing table; and
an engaging member that is movable in a radial direction of the fixing table and is adapted to be engaged with the bolt passing through the first flange portion to prevent the first flange portion from rotating when the fixing table mounting the one of the outer and inner races is rotated.
2. The apparatus according to claim 1 , further comprising:
a supporting member that supports the first flange portion to have radial movement of the first flange portion restricted within a predetermined range when the first flange portion and the grindstone are brought into contact with each other.
3. The apparatus according to claim 1 , further comprising:
a load applying device that applies a load in an axial direction against the grindstone to the other of the inner and outer races and rotates the other of the inner and outer races when the first flange portion is ground.
4. The apparatus according to claim 1 , wherein the load applying device applies the load to a second flange portion formed at the other of the inner and outer races.
5. The apparatus according to claim 3 , wherein the grindstone is rotated in a direction opposite to a direction of rotation of the other of the inner and outer races.