EP 0061539 B1 19850206 - CONTROL METHOD FOR MULTI-STRAND ROLLING MILL
Title (en)
CONTROL METHOD FOR MULTI-STRAND ROLLING MILL
Publication
Application
Priority
EP 81301316 A 19810326
Abstract (en)
[origin: EP0061539A1] When two workpiece strands (14, 16) pass through a roll gap between two grooved working rolls (10, 12) on a roll stand to be rolled, the trailing end of one of them may leave the rolls to change the roll gap. At that time screw-down devices (20, 22) on each side of the roll stand are controlled to adjust the roll gap at least at the position of the remaining workpiece. Also in a multi-strand tandem rolling mill, rolling speeds on roll stands upstream of a roll stand from which one of the strands has departed are changed by a speed ratio of (1-b2)/(1-b1) where b1 and b2 designate the rates of backward slips in the presence of the two strands and in the absence of one of the strands on the last-mentioned roll stand. Alternatively roll speeds on roll stands downstream of that roll stand may be changed by a speed ratio of (1 + f2)/(1 + f1) where f1 and f2 designate the rates of forward slip which correspond to the b1 and b2 respectively.
IPC 1-7
IPC 8 full level
B21B 37/16 (2006.01); B21B 1/18 (2006.01); B21B 13/00 (2006.01); B21B 13/02 (2006.01)
CPC (source: EP)
B21B 37/165 (2013.01); B21B 1/18 (2013.01); B21B 13/02 (2013.01); B21B 2013/006 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0061539 A1 19821006; EP 0061539 B1 19850206; DE 3168723 D1 19850321
DOCDB simple family (application)
EP 81301316 A 19810326; DE 3168723 T 19810326