| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately improve the deflection (A-RRO) of a disk loading face 5b. SOLUTION: Through laser forming work performed by irradiating a proper position on the hub 5 side with a laser beam 5d, the hub 5 is displaced at least in the axial direction, to the extent that the deflection of the disk loading face 5b is brought into a prescribed range. Thus, improvement in the deflection precision of the disk loading face 5b, which is difficult by mechanical forming means, is accomplished by employing the laser forming work method. |
