EP 0348777 B1 19940824 - Control of section rolling mill trains.
Title (en)
Control of section rolling mill trains.
Title (de)
Regelung für Profilstrassen.
Title (fr)
Commande pour trains de laminoirs à profilés.
Publication
Application
Priority
DE 3821990 A 19880630
Abstract (en)
[origin: EP0348777A2] When rolling sections in universal stands of continuously operating section rolling mill trains, it has been found that changes in the speed ratios between the horizontal rolls and the vertical rolls lead to undesired material flow changes. As a result of the horizontal roll speed, the deformation in the section parts, the resulting transverse flow and the external forces at the roll gap, a certain speed is produced in the vertical rolls in proportion to the horizontal roll speed. Any change of the edge conditions of the rolling process leads to a change of the speed ratios between horizontal and vertical rolls. In order to eliminate these disadvantages, it is proposed to control the speed of the vertical rolls of the universal stands to influence optimally the horizontal roll speed and the vertical roll speed via a control device and to obtain a minimal pull between stands via a further control.
IPC 1-7
IPC 8 full level
B21B 37/00 (2006.01); B21B 37/46 (2006.01); B21B 37/48 (2006.01); B21B 37/52 (2006.01); B21B 37/78 (2006.01); B21B 1/08 (2006.01)
CPC (source: EP US)
B21B 37/46 (2013.01 - EP US); B21B 37/52 (2013.01 - EP US); B21B 1/088 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE ES FR GB IT LU SE
DOCDB simple family (publication)
EP 0348777 A2 19900103; EP 0348777 A3 19901227; EP 0348777 B1 19940824; AT E110308 T1 19940915; DE 3821990 A1 19900111; DE 58908225 D1 19940929; JP 2628520 B2 19970709; JP H0246906 A 19900216; US 5085065 A 19920204
DOCDB simple family (application)
EP 89111074 A 19890619; AT 89111074 T 19890619; DE 3821990 A 19880630; DE 58908225 T 19890619; JP 16282589 A 19890627; US 53225890 A 19900601