| 摘要 |
PROBLEM TO BE SOLVED: To provide an impeller which can be fixed to a cutting tool firmly for improving processing efficiency and which can reduce danger of deterioration of balance and breakage with a simple structure, an impeller cutting tool and a processing method for an impeller.SOLUTION: An impeller having a hole part engaged with a shaft part of a tool includes: a base material capable of being mounted on the shaft part; a plurality of blades protruding from the surface of the base material and provided in a circumferential direction; and a plurality of recessed parts formed on a rear surface of the base material, at a position of rotational symmetry with the hole part being the center, and a position excluding a region in which a root portion of the blades is projected on the rear surface of the base material. Thereby, by engaging the recessed parts of the impeller with projection parts provided on a seating surface of the cutting tool, the impeller can be fixed at the cutting tool firmly without applying an excessive force on the impeller, and unexpected deformation of the impeller can be suppressed. |
