Title:
STATOR CORE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2012/131850
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a method for manufacturing a stator having a yoke section having a cut section with small distortion. This stator core manufacturing method, which forms a cut section on a stator core, provided with a teeth section and a yoke section formed with a single cut section, formed by layering core steel plates, is characterized by having: an inner diameter hole forming process where a teeth section and an inner diameter hole are formed on the inner diameter of the core steel plate prior to the steel plate being formed; a pilot hole forming process where a pilot hole is formed, in one spot along the outer perimeter of the area of the core steel plate being punched out, on the steel plate prior to being formed; a cut section forming process where a cut section is formed from the inner diameter hole to the pilot hole; and a core steel plate punching out process where the core steel plate is punched out from the steel plate prior to being formed.
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Inventors:
TANAHASHI FUMIKI (JP)
Application Number:
PCT/JP2011/057429
Publication Date:
October 04, 2012
Filing Date:
March 25, 2011
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
TANAHASHI FUMIKI (JP)
TANAHASHI FUMIKI (JP)
International Classes:
H02K1/18; H02K15/02
Foreign References:
| JPH1075552A | 1998-03-17 | |||
| JPH07222408A | 1995-08-18 | |||
| JP2006353001A | 2006-12-28 |
Other References:
See also references of EP 2690752A4
Attorney, Agent or Firm:
COSMOS PATENT OFFICE (JP)
Patent business corporation cosmos patent firm (JP)
Patent business corporation cosmos patent firm (JP)
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