Global Patent Index - EP 2572808 A1

EP 2572808 A1 20130327 - Cold-rolling mill, tandem rolling system, reversing rolling system, modification method of rolling system, and operating method of cold-rolling mill

Title (en)

Cold-rolling mill, tandem rolling system, reversing rolling system, modification method of rolling system, and operating method of cold-rolling mill

Title (de)

Kaltwalzwerk, Tandemwalzsystem, Umkehrwalzsystem, Modifikationsverfahren des Walzsystems und Betriebsverfahren des Kaltwalzwerks

Title (fr)

Laminoir à froid, système de laminage en tandem, système de roulement d'inversion, procédé de modification d'un système de roulement et procédé de fonctionnement d'un laminoir à froid

Publication

EP 2572808 A1 20130327 (EN)

Application

EP 12184124 A 20120912

Priority

JP 2011071391 W 20110920

Abstract (en)

By reducing the work roll in diameter, rolling of a harder steel strip than ever and rolling of a steel strip of the same hardness as before at a higher reduction ratio can be performed, while preventing decrease in productivity due to use of such a small-diameter work roll mill as in the cluster type rolling mill. A cold-rolling mill 51 for rolling a metal strip 1 of minimum width not less than 600 mm and maximum width not less than 1,500 mm but not greater than 1,900 mm comprises a pair of upper and lower work rolls 2 for rolling the steel strip 1 to be rolled; a pair of upper and lower intermediate rolls 3 supporting the work rolls 2, respectively; a pair of upper and lower buck-up rolls 4 supporting the intermediate rolls 3, respectively; an axial direction roll shifting device 23 for each of the intermediate rolls 3; and bending devices 10, 11 for each of the work rolls 2 and the intermediate rolls 3. The work rolls 2 each have a diameter not less than 300 mm but not greater than 400 mm, and the intermediate roll 3 each have a diameter not less than 560 mm but not greater than 690 mm.

IPC 8 full level

B21B 13/14 (2006.01); B21B 29/00 (2006.01)

CPC (source: EP KR)

B21B 1/22 (2013.01 - KR); B21B 13/14 (2013.01 - EP KR); B21B 27/02 (2013.01 - KR); B21B 29/00 (2013.01 - EP KR); B21B 1/28 (2013.01 - EP); B21B 1/36 (2013.01 - EP); B21B 13/142 (2013.01 - EP); B21B 31/20 (2013.01 - EP); B21B 35/14 (2013.01 - EP); B21B 2013/028 (2013.01 - EP); B21B 2261/06 (2013.01 - EP); B21B 2267/06 (2013.01 - EP)

Citation (applicant)

  • JP H0334928 B2 19910524
  • "Textbook of the 101st Lecture on Plastic Working", JAPAN SOCIETY FOR TECHNOLOGY OF PLASTICITY, article "Basics and Application of Strip Rolling - Crown and Flatness", pages: 62

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2572808 A1 20130327; EP 2572808 B1 20140521; BR 112012027654 A2 20160816; BR 112012027654 B1 20180313; CN 103118813 A 20130522; CN 103118813 B 20160120; JP 4928653 B1 20120509; JP WO2013042204 A1 20150326; KR 101424375 B1 20140731; KR 20130054965 A 20130527; WO 2013042204 A1 20130328

DOCDB simple family (application)

EP 12184124 A 20120912; BR 112012027654 A 20110920; CN 201180018331 A 20110920; JP 2011071391 W 20110920; JP 2011554001 A 20110920; KR 20127032141 A 20110920