Title:
A manufacturing method of a powder magnetic core
Document Type and Number:
Japanese Patent JP5997424
Kind Code:
B2
Abstract:
A method includes a step of compacting an insulation-coated pure iron powder or an iron-based alloy powder mainly containing iron using a die to obtain a dust core, a step of heat-treating the obtained dust core, and a step of post-machining at least one portion of the heat-treated dust core using a grinding wheel. In the post-machining step, grinding is performed in such a manner that the dust core and the grinding wheel are rotated, whereby isotropic machining marks are formed on a machined surface of the dust core.
More Like This:
Inventors:
Tomoyuki Ueno
Yoshiyuki Shimada
Yoshiyuki Shimada
Application Number:
JP2011160978A
Publication Date:
September 28, 2016
Filing Date:
July 22, 2011
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
Sumitomo Electric Sintered Alloy Co., Ltd.
Sumitomo Electric Sintered Alloy Co., Ltd.
International Classes:
H01F41/02; B22F1/02; B22F3/00; B22F3/035; B22F3/24; B24B7/00; B24B9/04; B24B53/00; B24D3/00; B24D7/00; C09K3/14; H01F27/255
Domestic Patent References:
| JP5217777A | ||||
| JP2002079443A | ||||
| JP2002200546A | ||||
| JP59187445A | ||||
| JP2005268684A | ||||
| JP2003059741A | ||||
| JP2009259991A | ||||
| JP6012713A | ||||
| JP482664A | ||||
| JP4318182A |
Foreign References:
| WO2009075173A1 | ||||
| WO2008136383A1 |
Attorney, Agent or Firm:
Patent Business Corporation Suncrest International Patent Office