MANUFACTURING METHOD OF RARE-EARTH MAGNET

Title:

MANUFACTURING METHOD OF RARE-EARTH MAGNET

Document Type and Number:

Japanese Patent JP2014203842

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a manufacturing method of a rare-earth magnet capable of improving residual magnetization by making distortion distribution uniform.SOLUTION: The manufacturing method includes the following steps of: a first step of manufacturing a rare-earth magnet precursor through first hot plasticity processing in which deformation is suppressed by bringing one side surface into a restricted state between two side surfaces parallel to a pressing direction of a sintered body and opposing each other and deformation is allowed by bringing the other side surface into a non-restricted state; and a second step of manufacturing a rare-earth magnet M through second hot processing in which deformation is suppressed by bringing a side surface S'2 which is in the non-restricted state in the first step, into the restricted state between two side surfaces S'1 and S'2 parallel to a pressing direction of the rare-earth magnet precursor S' and deformation is allowed by bringing the side surface S'1 which is in the restricted state in the first step, into the non-restricted state.

Inventors:

KANO AKIRA
KOBUCHI MASARU
HOSHINA EISUKE
YAMASHITA OSAMU
MIYAMOTO NORITAKA

Application Number:

JP2013076056A

Publication Date:

October 27, 2014

Filing Date:

April 01, 2013

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

H01F41/02; B21J5/00; B21J5/08; B22F3/00; B22F3/24

Domestic Patent References:

JPS58182206A	1983-10-25
JP2012138507A	2012-07-19
JPH09276972A	1997-10-28
JP2012174986A	2012-09-10

Foreign References:

US20130321112A1

2013-12-05

Attorney, Agent or Firm:

Yusuke Hiraki
Mitsuo Sekiya
Takiji Ishikawa

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