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Title:
METHOD AND DEVICE FOR MINIATURIZING MAGNETIC DOMAINS OF DIRECTIONAL ELECTRIC STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2017/126810
Kind Code:
A1
Abstract:
By optimizing equipment and processing, magnetic domain miniaturization efficiency can be increased, workability can be improved, and processing ability can be increased through same. Provided is a method for miniaturizing the magnetic domains of a directional electric steel plate, the method comprising: a steel plate supporting roll position adjusting step of controlling the vertical direction position of a steel plate that progresses along a production line while supporting the steel plate; and a laser emitting step of emitting a laser beam onto the steel plate surface and melting the steel plate to form a groove in the surface of the steel plate, the laser emitting step including an angle changing step of rotating an optical system, which emits the laser beam onto the steel plate, with respect to the steel plate, and changing the emitted angle of the laser beam with respect to the width direction of the steel plate, wherein the method further comprises a focal distance maintaining step of changing the tilt of the steel plate supporting roll to support the steel plate to match the change in focal distance of the laser beam along the width direction of the steel plate.

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Inventors:
LEE GYOO TAEK (KR)
CHUN MYUNG SIK (KR)
HONG SEONG CHEOL (KR)
MIN KI YOUNG (KR)
Application Number:
PCT/KR2016/015160
Publication Date:
July 27, 2017
Filing Date:
December 23, 2016
Export Citation:
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Assignee:
POSCO (KR)
International Classes:
C21D8/12; B23K26/08; B23K26/16; B23K26/352; B23K26/354; B23K26/364; B23K26/70; B23K37/047; C21D10/00
Foreign References:
KR20120073913A2012-07-05
KR101562962B12015-10-23
JP2012012661A2012-01-19
KR101395800B12014-05-20
KR20150093143A2015-08-17
Other References:
See also references of EP 3406740A4
Attorney, Agent or Firm:
YOU ME PATENT AND LAW FIRM (KR)
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