EP 0063633 A1 19821103 - Automatic control methods and devices for rolling mills.
Title (en)
Automatic control methods and devices for rolling mills.
Title (de)
Verfahren und Vorrichtung zur automatischen Steuerung von Walzwerken.
Title (fr)
Procédé et dispositif de commande automatique pour laminoirs.
Publication
Application
Priority
EP 81103238 A 19810429
Abstract (en)
In methods of automatically controlling the strip thickness in a rolling mill for producing a rolled product having a desired thickness and devices therefore, either an automatic gauge control (AGC) mode for controlling a deviation of the output thickness of a material being rolled from the predetermined desired uniform gauge thickness to be diminished to zero ro an automatic reduction rate control (ARC) mode for controlling the rate of reduction of the material being rolled to a predetermined value is properly selected in accordance with the rolling condition, i. e., the degree of the actually measured output thickness deviation of the material or the progress of the rolling passes. Furthermore, as a method of and a device for automatically controlling the rate of reduction suitabe for the ARC mode of the methods of and the devices for automatically controlling the strip thickness, the rate of reduction is controlled such that an output thickness of the material is calculated from an actually measured input thickness of the material and a desired rate of reduction based on the principle of the constant mass-flow rate of the material being rolled, an input thickness is estimated from the calculated output thickness, an input length and an output length, and an error signal between the estimated input thickness and the actually measured input thickness is diminished to zero.
IPC 1-7
IPC 8 full level
B21B 37/18 (2006.01)
CPC (source: EP)
B21B 37/18 (2013.01)
Citation (search report)
- US 3624369 A 19711130 - KIP RULOFF F JR
- DE 2027249 A1 19701210
- US 3237071 A 19660222 - MCMATH PAUL L, et al
- US 4244025 A 19810106 - ALSHUK THOMAS J
- JP S5666314 A 19810604 - KAWASAKI STEEL CO
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0063633 A1 19821103; EP 0063633 B1 19860723; DE 3174969 D1 19860828
DOCDB simple family (application)
EP 81103238 A 19810429; DE 3174969 T 19810429