Title:
METHOD FOR MANUFACTURING MOTOR CORE
Document Type and Number:
WIPO Patent Application WO/2023/112805
Kind Code:
A1
Abstract:
The present invention achieves a method for manufacturing a motor core with which sufficient caulking force can be ensured, even in the case of a thin electromagnetic steel plate. The method for manufacturing a motor core according to an embodiment of the present disclosure is such that, when a caulking portion (11) for caulking and fastening an electromagnetic steel plate (100) is formed, the caulking portion (11) comprises a caulking straight portion (11a), a caulking tapered portion (11b) disposed on both sides of the caulking straight portion (11a), and a caulking shoulder portion (11c), which is a level difference between the edge of the caulking tapered portion (11b) and a flat portion (12) of another area with respect to the caulking portion (11). Provided that T is the plate thickness of the flat portion (12), A is the height of the caulking shoulder portion (11c), and B is the height of the caulking straight portion (11a), the following expressions (1) to (3) are satisfied. Expression (1): B − A ≤ T
Expression (2): 0.9T ≤ B ≤ 1.2T
Expression (3): 0 < A ≤ 0.2T
Inventors:
IWAMOTO YUMA (JP)
TAKAHASHI TAKASHI (JP)
TAKAHASHI TAKASHI (JP)
Application Number:
PCT/JP2022/045202
Publication Date:
June 22, 2023
Filing Date:
December 08, 2022
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
International Classes:
H02K15/02; H01F41/02
Domestic Patent References:
| WO2017195249A1 | 2017-11-16 |
Foreign References:
| JPH11300437A | 1999-11-02 | |||
| JP2015171288A | 2015-09-28 | |||
| JP2014087108A | 2014-05-12 | |||
| JPH07185695A | 1995-07-25 | |||
| JP2015164397A | 2015-09-10 | |||
| JP2006166500A | 2006-06-22 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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