EP 0349885 A3 19911113 - METHOD FOR COLD-ROLLING SHEETS AND BANDS
Title (en)
METHOD FOR COLD-ROLLING SHEETS AND BANDS
Publication
Application
Priority
DE 3823202 A 19880708
Abstract (en)
[origin: EP0349885A2] The invention relates to a method for cold-rolling sheets and bands, measured values which characterise the flatness, in particular the tensile stress distribution, being formed on the delivery side of a roll stand and, as a function thereof, control elements of the rolling mill, which belong to at least one regulator circuit for the flatness of the rolled sheets and bands, being actuated. In this arrangement, according to the invention, regulating errors and disruption of the rolling process due to the varying time response of the individual control elements of the rolling mill are avoided by the fact that the control elements of the regulator circuit or circuits are adjusted at such mutually matched speeds that, at least during part of the dwell time, the ratio of the regulating distances of the control elements concerned remains constant, provided that all control elements simultaneously reach their setpoint value. <IMAGE>
IPC 1-7
IPC 8 full level
B21B 37/00 (2006.01); B21B 37/28 (2006.01); B21B 37/38 (2006.01); B21B 37/42 (2006.01)
CPC (source: EP US)
B21B 37/42 (2013.01 - EP US)
Citation (search report)
- [Y] JP S62214814 A 19870921 - KOBE STEEL LTD
- [Y] DE 3517405 A1 19851121 - WAERTSILAE OY AB [FI]
- [A] JP S6356310 A 19880310 - HITACHI SHIPBUILDING ENG CO
- [A] US 4726213 A 19880223 - MANCHU TETSUO [JP]
- [A] US 3714805 A 19730206 - STONE M
- [A] PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE, BOSTON, 19.-21. Juni 1985, Vol. 3, 21. Juni 1985, Seiten 1359-1364, IEEE, NEW YORK; US; J.V. RINGWOOD: "LEAST SQUARES IDENTIFICATION WITH APPLICATION TO SHAPE CONTROL IN A SENDZIMIR COLD ROLLING STEEL MILL"
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0349885 A2 19900110; EP 0349885 A3 19911113; EP 0349885 B1 19950111; DE 3823202 A1 19900111; DE 58908868 D1 19950223; JP 2776568 B2 19980716; JP H02133110 A 19900522; KR 900001425 A 19900227; KR 970001548 B1 19970211; US 4981028 A 19910101
DOCDB simple family (application)
EP 89111664 A 19890627; DE 3823202 A 19880708; DE 58908868 T 19890627; JP 17575889 A 19890710; KR 890009706 A 19890707; US 37592289 A 19890706