Title:
STEEL SHEET HOISTING METHOD USING LIFTING MAGNET, LIFTING MAGNET, AND STEEL SHEET PRODUCTION METHOD USING LIFTING MAGNET
Document Type and Number:
WIPO Patent Application WO/2022/180993
Kind Code:
A1
Abstract:
The present invention makes it possible to use a lifting magnet to stably and reliably hoist a desired number of steel sheets regardless of the sheet thickness of the steel sheets while highly precisely controlling the depth of magnetic flux permeation in accordance with the number and sheet thickness of the steel sheets. The present invention uses a lifting magnet 1 that comprises: a plurality of electromagnet coils 2 that are each independently subject to ON-OFF control and voltage control; and magnetic poles 3 that are excited when voltage is applied to the electromagnet coils 2. On the basis of the total sheet thickness of steel sheets to be hoisted, the present invention determines the electromagnet coils 2 to be used to hoist the steel sheets. Then the present invention calculates the amount Φr of magnetic flux that is to pass through the magnetic poles 3 in order for magnetic flux to pass only through the steel sheets to be hoisted when the relevant electromagnet coils 2 are used, determines the voltage to be applied to the electromagnet coils 2 to be used to hoist the steel sheets on the basis of said amount Φr of magnetic flux, and applies the relevant voltage to the electromagnet coils 2.
Inventors:
TAKAKI YUKI (JP)
TAKEMURA YUSAKU (JP)
KURIMOTO ATSUSHI (JP)
KAWAI AYAKA (JP)
TAKEMURA YUSAKU (JP)
KURIMOTO ATSUSHI (JP)
KAWAI AYAKA (JP)
Application Number:
PCT/JP2021/046215
Publication Date:
September 01, 2022
Filing Date:
December 15, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B66C1/06; B66C1/08
Domestic Patent References:
| WO2019107504A1 | 2019-06-06 |
Foreign References:
| JPS6362479U | 1988-04-25 | |||
| JPS5225361A | 1977-02-25 | |||
| KR20120073164A | 2012-07-04 | |||
| JPS52118756A | 1977-10-05 | |||
| JPH02295889A | 1990-12-06 |
Other References:
See also references of EP 4257532A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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