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Patent Searching and Data


Title:
MANUFACTURING METHOD OF RARE EARTH SINTERED MAGNET AND MANUFACTURING METHOD OF MAGNET FOR VCM (VOICE COIL MOTOR)
Document Type and Number:
Japanese Patent JP2006041295
Kind Code:
A
Abstract:

To provide the inexpensibly manufacturing method of a magnet for VCM having high magnetic characteristics.

The manufacturing method comprises a forming process in magnetic field obtaining a formed body GB provided with a main surface arranged so as to be opposed to a pressurizing direction, and a side surface connecting the main surface and parallel to the pressurizing direction by impressing a magnetic field in a direction orthogonal to the pressurizing direction on material alloy powder; a formed body working process for applying grinding work on one part or the whole of the main surface and the side surface; and a sintering process for sintering the formed body GB worked by grinding. In the grinding work, it is preferable that a profile grinding stone 4 is arranged so as to be opposed to a profile grinding stone 5, and that profile working for the outer diametral surface, inner diametral surface and side surface of the formed body GB is carried out in a process for passing the formed body GB between the total grinding stone 4 and the profile grinding stone 5.


Inventors:
SAITO YASUHIKO
SATO KAZUO
KOJIMA NOBUO
KUNIYOSHI YOICHI
Application Number:
JP2004221024A
Publication Date:
February 09, 2006
Filing Date:
July 29, 2004
Export Citation:
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Assignee:
TDK CORP
International Classes:
H01F41/02; B22F3/02; B22F3/10; C22C38/00; H02K15/03; B22F3/24
Attorney, Agent or Firm:
Mitsuru Oba