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US 11,962,204 B2Granted
Rotor manufacturing method and rotor manufacturing apparatus
AssigneeAisin Corporation
InventorsTakaaki Kawashima, Yutaka Hara, Mariko Saito
Life of this patent
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Abstract
This rotor manufacturing method includes the steps of: pressing a rotor core in a central axis direction by using a core pressing member; and fixing a shaft to the rotor core by performing, with the rotor core pressed, hydroforming that involves pressure-welding the shaft to an inner peripheral surface of a shaft insertion hole.
Claims12
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.
1 more element
Dependencies are inferred from the claim text.