Title:
METHOD FOR MANUFACTURING CORE PLATE
Document Type and Number:
WIPO Patent Application WO/2018/016475
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a core plate (1) which has an annular core back (11) and a plurality of teeth (12) extending from the core back toward the center (O) thereof. The core plate is obtained by performing a punching step, a winding step, a strain machining step, and an annealing step. In the strain machining step, a compressive strain is imparted to the core back or a strip-shaped core back (21) that is to be formed into the core back after winding. In the annealing step following the strain machining step, the core back or the strip-shaped core back is recrystallized by annealing. This configuration enables improvement of magnetic properties in the teeth, and also enables prevention of deterioration in magnetic properties in the core back.
Inventors:
AOKI TETSUYA (JP)
SENOO TAKESHI (JP)
OKAZAKI KEIICHI (JP)
DOI SATOSHI (JP)
FUJIMURA HIROSHI (JP)
SATO HIROAKI (JP)
SENOO TAKESHI (JP)
OKAZAKI KEIICHI (JP)
DOI SATOSHI (JP)
FUJIMURA HIROSHI (JP)
SATO HIROAKI (JP)
Application Number:
PCT/JP2017/025915
Publication Date:
January 25, 2018
Filing Date:
July 18, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
NIPPON STEEL & SUMITOMO METAL CORP (JP)
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
H02K15/02; C22C38/00; H01F41/00; H02K1/02
Foreign References:
| JP2015122893A | 2015-07-02 | |||
| JPH0992561A | 1997-04-04 | |||
| JP2016094655A | 2016-05-26 | |||
| JP2014193000A | 2014-10-06 | |||
| JPH01159324A | 1989-06-22 | |||
| JPH01159323A | 1989-06-22 |
Other References:
See also references of EP 3490119A4
Attorney, Agent or Firm:
JIN Shunji (JP)
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