Title:
METHOD OF MANUFACTURING COLD-ROLLED STEEL SHEET AND MANUFACTURING EQUIPMENT USED FOR THE SAME
Document Type and Number:
Japanese Patent JP2010179316
Kind Code:
A
Abstract:
To provide a method for stably manufacturing a cold-rolled steel sheet with good quality by preventing push-in flaw due to properties of specifically a product edge part and trimming after cold rolling, and also to provide an equipment used for the same.
A pair of upper and lower circular rotary blades are pressed to a predetermined depth from the above and below with respect to the edge part of the steel sheet before pickling. Shearing is applied to the edge part in an unseparated state. Next the edge parts are separated by pinching with narrow width rolls arranged at the respective edge parts and capable of pinching only the edge parts, and then the pickling and the cold rolling are applied.
Inventors:
KAWAI TAKAMASA
TATENO JUNICHI
YAMADA MAKOTO
TOKUNAGA MUNEYASU
TATENO BUNGO
TATENO JUNICHI
YAMADA MAKOTO
TOKUNAGA MUNEYASU
TATENO BUNGO
Application Number:
JP2009022357A
Publication Date:
August 19, 2010
Filing Date:
February 03, 2009
Export Citation:
Assignee:
JFE STEEL CORP
International Classes:
B21B15/00; B21B1/22; B23D19/06
Attorney, Agent or Firm:
Kenichiro Ochiai
Kazuhiro Mori
Kazuhiro Mori
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