EP 3702058 A1 20200902 - SHAPED STEEL ROLLING METHOD, SHAPED STEEL MANUFACTURING LINE, AND SHAPED STEEL MANUFACTURING METHOD
Title (en)
SHAPED STEEL ROLLING METHOD, SHAPED STEEL MANUFACTURING LINE, AND SHAPED STEEL MANUFACTURING METHOD
Title (de)
FORMSTAHLWALZVERFAHREN, FORMSTAHLHERSTELLUNGSLINIE UND FORMSTAHLHERSTELLUNGSVERFAHREN
Title (fr)
PROCÉDÉ DE LAMINAGE D'ACIER PROFILÉ, LIGNE DE FABRICATION D'ACIER PROFILÉ ET PROCÉDÉ DE FABRICATION D'ACIER PROFILÉ
Publication
Application
Priority
- JP 2018001784 A 20180110
- JP 2018048177 W 20181227
Abstract (en)
Regarding each rolling mill, a rolling torque Gi before biting into a downstream stand is stored, the peripheral velocity of a most downstream stand Rn is controlled to be Gn-1 = Gn-1* after biting into Rn, and a rolling torque Gn** of Rn after tension is stabilized is stored. After that, the peripheral velocity of a rolling mill Ri is controlled to be Gi = Gi* toward an upstream side, and the peripheral velocity of a rolling mill Rk at a downstream side of the rolling mill Ri is controlled to keep Gk = Gk** (k = i+1 to n) so that a rolling torque of a most upstream rolling mill R1 becomes equal to a stored G1*. Stabilization of material passage and improvement in accuracy of a product dimension are enabled by controlling tension between stands with high accuracy by using a simple control system without using table values or the like by each rolling condition even under a condition where a distance between stands is short.
IPC 8 full level
B21B 37/00 (2006.01); B21B 1/12 (2006.01); B21B 37/52 (2006.01)
CPC (source: EP US)
B21B 1/088 (2013.01 - EP US); B21B 1/12 (2013.01 - US); B21B 37/52 (2013.01 - US); B21B 37/46 (2013.01 - EP); B21B 2201/10 (2013.01 - US); B21B 2265/02 (2013.01 - US); B21B 2265/06 (2013.01 - EP); B21B 2275/12 (2013.01 - EP)
Citation (search report)
See references of WO 2019138908A1
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 3702058 A1 20200902; AU 2018400555 A1 20200618; JP 6551625 B1 20190731; JP WO2019138908 A1 20200123; US 2020338608 A1 20201029; WO 2019138908 A1 20190718
DOCDB simple family (application)
EP 18899047 A 20181227; AU 2018400555 A 20181227; JP 2018048177 W 20181227; JP 2019506208 A 20181227; US 201816771941 A 20181227