| 摘要 |
PROBLEM TO BE SOLVED: To suppress deformation of a vane rotor at a time of chucking the vane rotor for cutting work. SOLUTION: This method includes a cutting process forming a center hole passing through a center of a boss part 9d of the vane rotor 9 by cutting work and the vane rotor 9 is chucked by at least three or more chuck claws 51, 52, 53 having tip parts 51a, 51b thereof formed in a forked shape during the cutting process. At that time, a chucking position of the forked tip parts 51a, 51b of the chuck claws 51, 52, 53 is set on an outer circumference surface of the boss part 9 with avoiding a plurality of vane parts 9a, 9b, 9c defined by a rising start position. The vane rotor 9 can be chucked while suppressing deformation of the vane parts 9a, 9b, 9c.
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