Title:
DIE AND METHOD FOR FORMING A PERMANENT MAGNET FROM A PREFORM AND HOT DEFORMATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/183824
Kind Code:
A1
Abstract:
A die (1, 101, 201, 301, 401) for forming a permanent magnet from a preform comprises a die body (3, 103, 203, 303, 403) and at least one die cavity (5, 105, 205, 305, 405) formed in the die body and having an input port (7, 107, 207, 307, 407) and an output port (9, 109, 209, 309, 409). The at least one die cavity each comprises at least two portions which open into each other, two adjacent ones of the at least two portions are deflected with respect to each other at an angle (α). A hot deformation system comprising the die and a method for forming a permanent magnet from a preform using the hot deformation system are provided. It is possible to restrain the grains from growing, thereby allowing the finished permanent magnet having a high coercivity.
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Inventors:
YU JIAQING (CN)
CHEN BICHENG (CN)
CHEN BICHENG (CN)
Application Number:
PCT/CN2015/079386
Publication Date:
November 24, 2016
Filing Date:
May 20, 2015
Export Citation:
Assignee:
BOSCH GMBH ROBERT (DE)
YU JIAQING (CN)
CHEN BICHENG (CN)
YU JIAQING (CN)
CHEN BICHENG (CN)
International Classes:
H01F41/02; H01F7/02
Foreign References:
| CN101250619A | 2008-08-27 | |||
| CN101889098A | 2010-11-17 | |||
| JP2000225412A | 2000-08-15 | |||
| CN102623166A | 2012-08-01 | |||
| CN101145442A | 2008-03-19 |
Attorney, Agent or Firm:
NTD PATENT AND TRADEMARK AGENCY LIMITED (CN)
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