CPC H02K 15/02 (2013.01) [B23P 19/02 (2013.01)] | 12 Claims |
1. A method for manufacturing a rotor that is operatively associated with an apparatus, the rotor includes an annular rotor core provided with a shaft insertion hole, and a tubular shaft, the rotor manufacturing method comprising steps of:
inserting the tubular shaft into the shaft insertion hole of the rotor core;
pressing the rotor core in a central axis direction of the rotor core by using a core pressing member of the apparatus; and
fixing the tubular shaft to the rotor core, while the rotor core pressed by performing hydroforming, wherein the performing of hydroforming comprises filling a fluid into the tubular shaft and pressurizing the fluid so as to expand the tubular shaft, thus pressure-welding the tubular shaft to an inner peripheral surface of the shaft insertion hole.
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