Method for manufacturing field magnet

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United States of America Patent

PATENT NO 11710598
APP PUB NO 20220223341A1
SERIAL NO

17595349

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Abstract

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A field magnet manufacturing method where a bonded magnet's inner surface press-fitted in a yoke has a certain accuracy irrespective of the accuracy of the yoke's outer circumferential surface. A cylindrical bonded magnet from binding magnet particles with a thermosetting resin is fixed in a tubular yoke of magnetic material. The method includes reheating and softening the bonded magnet after thermal curing; and press-fitting in the bonded magnet after the softening step from a tapered portion on one end side of the yoke to press the bonded magnet's outer circumferential surface against the yoke's inner surface. The press-fitting includes feeding the bonded magnet relatively into the yoke while allowing a relative posture variation between the bonded magnet and the yoke so the bonded magnet's inner surface to be remolded into a shape along the inner surface of the yoke exhibits almost the same accuracy as the yoke's inner surface.

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Patent Owner(s)

Patent OwnerAddress
AICHI STEEL CORPORATION1 WANO-WARI ARAO-MACHI AICHI TOKAI-SHI 476-8666

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asano, Takumi Aichi-ken, JP 8 51
Furuyama, Motonobu Aichi-ken, JP 3 0
Hirano, Hiroaki Aichi-ken, JP 23 34
Kan, Satoru Aichi-ken, JP 4 17
Mitarai, Hironari Aichi-ken, JP 17 175

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