Global Patent Index - EP 4212260 A4

EP 4212260 A4 20240124 - COLD ROLLING METHOD, COLD ROLLING EQUIPMENT, AND COLD-ROLLED STEEL SHEET MANUFACTURING METHOD

Title (en)

COLD ROLLING METHOD, COLD ROLLING EQUIPMENT, AND COLD-ROLLED STEEL SHEET MANUFACTURING METHOD

Title (de)

KALTWALZVERFAHREN, KALTWALZAUSRÜSTUNG UND VERFAHREN ZUR HERSTELLUNG EINES KALTGEWALZTEN STAHLBLECHS

Title (fr)

PROCÉDÉ DE LAMINAGE À FROID, ÉQUIPEMENT DE LAMINAGE À FROID ET PROCÉDÉ DE FABRICATION DE TÔLE D'ACIER LAMINÉE À FROID

Publication

EP 4212260 A4 20240124 (EN)

Application

EP 21866765 A 20210907

Priority

  • JP 2020152348 A 20200910
  • JP 2021032889 W 20210907

Abstract (en)

[origin: EP4212260A1] A cold rolling method, cold rolling equipment, and a cold-rolled steel sheet manufacturing method capable of preventing sheet breakage by sufficiently suppressing occurrence of an edge crack of a material to be rolled during cold rolling are provided. In the cold rolling method, a rolling mill (2) including a plurality of stands (3<sub>1</sub>) to (3<sub>4</sub>) cold-rolls a material to be rolled (S). An N-th stand (3<sub>N</sub>) (N is a natural number equal to or greater than 2) arranged in an N-th position from an upstream side of the material to be rolled (S) in a transfer direction among the plurality of stands (3<sub>1</sub>) to (3<sub>4</sub>), includes a tapered work roll (4a1) having a taper (4ab) formed on an end portion of a roll (4aa) having a uniform diameter. The N-th stand (3<sub>N</sub>) rolls the material to be rolled (S) with a linear load of 0.8 t/mm or more.

IPC 8 full level

B21B 37/28 (2006.01); B21B 37/40 (2006.01)

CPC (source: EP US)

B21B 13/142 (2013.01 - US); B21B 37/28 (2013.01 - EP); B21B 37/58 (2013.01 - EP); B21B 1/28 (2013.01 - EP); B21B 13/142 (2013.01 - EP); B21B 37/40 (2013.01 - EP); B21B 2001/221 (2013.01 - EP US); B21B 2265/12 (2013.01 - EP)

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

DOCDB simple family (publication)

EP 4212260 A1 20230719; EP 4212260 A4 20240124; CN 115968325 A 20230414; JP 7156557 B2 20221019; JP WO2022054806 A1 20220317; KR 20230039703 A 20230321; MX 2023002879 A 20230324; US 2024033795 A1 20240201; WO 2022054806 A1 20220317

DOCDB simple family (application)

EP 21866765 A 20210907; CN 202180051657 A 20210907; JP 2021032889 W 20210907; JP 2021565792 A 20210907; KR 20237005232 A 20210907; MX 2023002879 A 20210907; US 202118021400 A 20210907