Patent ID: 11962204
Assignee: AISIN CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC B  H

Claim 1:
2. The rotor manufacturing method according to claim 1, wherein
the inserting the tubular shaft comprises inserting a first tubular portion of the tubular shaft into the shaft insertion hole,
the pressing the rotor core by the using a shaft pressing member of the apparatus comprises pressing a step portion of the shaft from a first side in the central axis direction, the step portion defining a boundary between the first tubular portion of the tubular shaft and a second tubular portion of the tubular shaft, the second tubular portion being disposed on the first side in the central axis direction relative to the first tubular portion and having a diameter smaller than a diameter of the first tubular portion; and pressing an end face of the rotor core from the first side in the central axis direction by using the core pressing member of the apparatus, and
the fixing the tubular shaft to the rotor core comprises fixing the tubular shaft to the rotor core by hydroforming while the rotor core and the tubular shaft are pressed, the hydroforming further comprises pressure-welding the first tubular portion to the inner peripheral surface of the shaft insertion hole.