Title:
WOUND IRON CORE MANUFACTURING DEVICE AND WOUND IRON CORE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2023/149525
Kind Code:
A1
Abstract:
This wound iron core manufacturing device (40) comprises: a bending device which bends a steel plate (21); and a feed roll (60) which feeds the steel plate (21) to the bending device (20), wherein the bending device (20) includes a die (22) and a punch (24). The die (22) includes a curved section (51) disposed at the punch (24)-side end, and a flat section (52) which is continuously connected to the curved section from the opposite direction of a punch (24) side and abuts on the steel plate (21), wherein, when the distance from the center of the feed roll (60) to a die (22)-side end surface of the punch (24) along the conveyance direction (25) of the steel plate (21) is L mm, the diameter of the feed roll (60) is R mm, the pressure that is applied by the feed roll (60) to the steel plate (21) is pMPa, and a temperature is T °C at a position 20 mm away from the boundary between the curved part (51) and the flat part (52) in the opposite direction to the conveyance direction (25), a prescribed equation is satisfied.
Inventors:
MIZUMURA TAKAHITO (JP)
MOGI HISASHI (JP)
MOGI HISASHI (JP)
Application Number:
PCT/JP2023/003468
Publication Date:
August 10, 2023
Filing Date:
February 02, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
H01F41/02; H01F27/245
Foreign References:
| JP2018148036A | 2018-09-20 | |||
| JP2018060886A | 2018-04-12 | |||
| JPS6335746A | 1988-02-16 | |||
| JPS55132027A | 1980-10-14 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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