Title:
CORE MANUFACTURING METHOD, DEVICE, AND LAMINATED IRON CORE
Document Type and Number:
WIPO Patent Application WO/2023/106246
Kind Code:
A1
Abstract:
Provided is a core manufacturing method capable of mitigating scratches due to mutual sliding of end faces of laminated iron cores. An iron core piece P is punched out from a magnetic steel sheet W by a punch 3 and held in a die 5, and the die 5 is rotated by a predetermined angle. The holding of the iron core piece P by punching and the rotation of the die 5 are repeated to form a laminated iron core S with a stack of the core pieces P. The laminated iron core S in a lower portion with a predetermined height, which has passed through the die 5 and is supported on a receiving base 7, is separated from the laminated iron core S in an upper portion by lowering the receiving base 7. The rotation of the die 5 is stopped when the receiving base 7 is lowered in a state in which the laminated iron core S in the lower portion has passed through the die 5.
Inventors:
TAMARU KOSUKE (JP)
HAGIWARA TAKESHI (JP)
HAGIWARA TAKESHI (JP)
Application Number:
PCT/JP2022/044636
Publication Date:
June 15, 2023
Filing Date:
December 02, 2022
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
B21D28/02; H01F41/02; H02K15/02
Foreign References:
| JP2011205836A | 2011-10-13 | |||
| JP2013118732A | 2013-06-13 | |||
| JP2011125884A | 2011-06-30 | |||
| JPS6092023A | 1985-05-23 |
Attorney, Agent or Firm:
SUDO Yuichi et al. (JP)
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