| (19) |
 |
|
(11) |
EP 0 435 547 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
04.12.1991 Bulletin 1991/49 |
| (43) |
Date of publication A2: |
|
03.07.1991 Bulletin 1991/27 |
| (22) |
Date of filing: 18.12.1990 |
|
| (51) |
International Patent Classification (IPC)5: B21B 37/02 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
22.12.1989 GB 8929125
|
| (71) |
Applicant: British Steel plc |
|
London SE1 7SN (GB) |
|
| (72) |
Inventors: |
|
- Thorp, Julian Hugo
Lower Walkley,
Sheffield,
Yorkshire (GB)
- Harrison, Reginald Steven Thomas
Sheffield,
Yorkshire (GB)
- Szczul, Anthony
Beeston,
Nottinghamshire (GB)
|
| (74) |
Representative: Fry, Alan Valentine |
|
FRY HEATH & SPENCE
The Old College
53 High Street
Horley
Surrey RH6 7BN
Horley
Surrey RH6 7BN (GB) |
|
| |
|
| (54) |
Improvements in and relating to control systems for rolling mills |
(57) A dynamic control system for a mill for producing metal stock within desired dimensional
tolerances in at least two roll passes, comprises means for measuring the rolling
load applied to the stock by the ultimate stand of the mill and means for controlling
the effective modulus of the ultimate stand to produce in the ultimate stand a loaded
roll gap marginally less than the nominal for lower than nominal roll loads and marginally
greater than nominal for higher than nominal rolling loads