Method and device for manufacturing rotor for rotary electric machine

Patent metadata

Field	Value
Publication number	US-2025239923-A1
Application number	US-202218700995-A
Country	US
Kind code	A1
Filing date	Dec 6, 2022
Priority date	Dec 22, 2021
Publication date	Jul 24, 2025
Grant date	—

Abstract

A method for manufacturing a rotor for a rotary electric machine, the method including supporting a workpiece including a rotor core and a rotor shaft that is hollow and disposing the rotor shaft on an inner diameter side of the rotor core. Using an actuation member that is positionable in a hollow interior of the rotor shaft, having a cavity on a radially inner side, and is radially displaceable or deformable, so the actuation member radially faces or contacts a molding pressurization region on an inner peripheral surface of the rotor shaft. Applying a force in a radial direction to the actuation member while bringing the drive member into contact with a contacted portion of the actuation member in the cavity by applying a force in an axial direction to the drive member.

First claim

1 . A method for manufacturing a rotor for a rotary electric machine, the method comprising:
an arrangement step of supporting a workpiece including a rotor core and a rotor shaft that is hollow and forming a state in which the rotor shaft is disposed on an inner diameter side of the rotor core; a positioning step of positioning, for the rotor shaft, an actuation member that is positionable in a hollow interior of the rotor shaft, has a cavity on a radially inner side, and is radially displaceable or deformable, such that the actuation member radially faces or contacts a molding pressurization region a on an inner peripheral surface of the rotor shaft; and a load application step of applying a force in a radial direction to the actuation member while bringing the drive member into contact with a contacted portion of the actuation member in the cavity of the actuation member by applying a force in an axial direction to the drive member after the arrangement step and the positioning step.

2 . The method according to claim 1 , wherein the positioning step is executed a plurality of times on one of the workpieces such that the actuation member radially faces or contacts each of a plurality of the molding pressurization regions in the axial direction on the inner peripheral surface of the rotor shaft.

3 . The method according to claim 2 , wherein the load application step is executed for one of the workpieces in each of the positioning steps, and the force having a different magnitude is applied to the drive member when the load application step is executed corresponding to one of the positioning steps and when the load application step is executed corresponding to another one of the positioning steps.

4 . A device for manufacturing a rotor for a rotary electric machine, the device comprising:
a workpiece support that supports a workpiece including a rotor core and a rotor shaft that is hollow and forms a state in which the rotor shaft is disposed on an inner diameter side of the rotor core; an actuation member that is positionable in a hollow interior of the rotor shaft, has a cavity on a radially inner side, and is radially displaceable or deformable; a drive member that contacts a contacted portion of the actuation member in the cavity of the actuation member; positioning means that positions the actuation member for the rotor shaft such that the actuation member radially faces or contacts a molding pressurization region on an inner peripheral surface of the rotor shaft; and load application portion that applies a force in a radial direction to the actuation member while bringing the drive member into contact with the contacted portion by applying a force in an axial direction to the drive member located in the cavity of the actuation member positioned by the positioning means.

5 . The device according to claim 4 , wherein the contacted portion faces the molding pressurization region in the radial direction.

6 . The device according to claim 4 , wherein
the positioning means includes a base member that is movable up and down with respect to the workpiece, the actuation member has a first inclined surface that is slidable in the radial direction with respect to the base member and is inclined with respect to the axial direction on the contacted portion, and the drive member has a second inclined surface in surface contact with the first inclined surface.

7 . The device according to claim 6 , wherein the actuation member is divided in a circumferential direction, and each divided body forms the first inclined surface.

8 . The device according to claim 7 , wherein the base member is rotatable about an axis with respect to the workpiece.

9 . The device according to claim 4 , wherein the positioning means positions the actuation member for the rotor shaft such that the actuation member radially faces or contacts each of a plurality of the molding pressurization regions on the inner peripheral surface of the rotor shaft.

10 . The device according to claim 4 , wherein the load application portion applies, to the drive member, the force of a different magnitude between when the actuation member radially faces or contacts a first molding pressurization region of the plurality of molding pressurization regions and when the actuation member radially faces or contacts a second molding pressurization region different from the first molding pressurization region.

11 . The device according to claim 4 , wherein the actuation member and the drive member form a cam mechanism and include a metal material.

12 . The device according to claim 4 , further comprising:
a press machine including a slide and a bolster that is ascendable and descendible in an up-down direction; an upper mold including an upper mold fixing portion fixed to the slide; and a lower mold including the workpiece support fixed to the bolster and facing the upper mold in the up-down direction, wherein the positioning means includes the upper mold fixing portion, the actuation member is supported by the upper mold fixing portion, the drive member is supported by the upper mold fixing portion, and the load application portion includes a bed knockout pin provided in the bolster.

Assignees

• Aisin Corp

Inventors

• Kawashima Takaaki
• Adachi Takehiko
• Hoshino Akinori
• Nishizawa Kosuke
• Kondo Yoshihiko
• Sugita Hiroaki

Classifications

• H02K15/90

  Positioning or clamping dynamo-electric machines, e.g. jigs · CPC title

• H02K2215/00

  Specific aspects not provided for in other groups of this subclass relating to methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title

• H02K1/32

  with channels or ducts for flow of cooling medium · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• B21D39/06

  of tubes in openings, e.g. rolling-in · CPC title