Title:
METHOD FOR MANUFACTURING FIELD MAGNET
Document Type and Number:
WIPO Patent Application WO/2020/241828
Kind Code:
A1
Abstract:
The present invention provides a method for manufacturing a field magnet with which it is possible to form, at a prescribed degree of accuracy, the inner circumferential surface of a bond magnet press-fitted into a yoke, irrespective of the degree of accuracy of the outer circumferential surface of the yoke. The present invention is a method for manufacturing a field magnet in which a cylindrical bond magnet (2), which is obtained by binding magnet particles using a heat-curable resin, is fixed in a cylindrical yoke (1) made of a magnetic material. Specifically, the method for manufacturing a field magnet is provided with: a softening step for reheating a heat-curing-processed bond magnet and softening the bond magnet; and a press-fitting step for fitting in the bond magnet after the softening step from a tapered part (114) on one end side of a yoke, and pressing the outer circumferential surface (22b) of the bond magnet against the inner circumferential surface (12a) of the yoke. The press-fitting step is performed by relatively feeding the bond magnet into the yoke while allowing a relative variation in orientation between the bond magnet and the yoke. The inner circumferential surface of the bond magnet is thereby remolded to a shape matching the inner circumferential surface of the yoke, and is imparted with a degree of accuracy similar to that of the inner circumferential surface of the yoke.
Inventors:
KAN SATORU (JP)
HIRANO HIROAKI (JP)
MITARAI HIRONARI (JP)
ASANO TAKUMI (JP)
FURUYAMA MOTONOBU (JP)
HIRANO HIROAKI (JP)
MITARAI HIRONARI (JP)
ASANO TAKUMI (JP)
FURUYAMA MOTONOBU (JP)
Application Number:
PCT/JP2020/021350
Publication Date:
December 03, 2020
Filing Date:
May 29, 2020
Export Citation:
Assignee:
AICHI STEEL CORP (JP)
International Classes:
H02K15/03; H02K1/27
Domestic Patent References:
| WO2006001304A1 | 2006-01-05 | |||
| WO2011126026A1 | 2011-10-13 | |||
| WO2006059603A1 | 2006-06-08 |
Foreign References:
| JP2005033844A | 2005-02-03 | |||
| JP2000037054A | 2000-02-02 | |||
| JP2000184642A | 2000-06-30 | |||
| JP2005033844A | 2005-02-03 |
Other References:
See also references of EP 3979474A4
Attorney, Agent or Firm:
MORIOKA Masayuki et al. (JP)
Download PDF: