Title:
STATOR CORE MANUFACTURING METHOD AND STATOR CORE
Document Type and Number:
WIPO Patent Application WO/2023/162996
Kind Code:
A1
Abstract:
Provided is a stator core manufacturing method with which a layered object including a plurality of annular core plates layered in the thickness direction is divided in the circumferential direction to form divided cores each including a plurality of planar divided core pieces layered in the thickness direction. The stator core manufacturing method comprises: a division line forming step for forming a plurality of division lines disposed in the circumferential direction on a steel sheet by pushing out a division line forming area, where a boundary part between the plurality of divided core pieces is formed on the steel sheet, in the thickness direction of the steel sheet; and a push-back step for pushing the division line forming area that has been pushed out in the thickness direction back to the original position. In the division line forming step, on a first division line that is at least one of the plurality of division lines, a cut-off part at which a portion of the first division line is cut off is formed.
Inventors:
KITA NOBUYUKI (JP)
YONEYAMA TAKASHI (JP)
YONEYAMA TAKASHI (JP)
Application Number:
PCT/JP2023/006314
Publication Date:
August 31, 2023
Filing Date:
February 21, 2023
Export Citation:
Assignee:
NIDEC CORP (JP)
International Classes:
H02K1/18; H02K15/02
Domestic Patent References:
| WO2019159847A1 | 2019-08-22 |
Foreign References:
| JPH06217501A | 1994-08-05 | |||
| JP2001300647A | 2001-10-30 |
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