Optimizing the band width at the band ends on a mill train

Details Optimizing the band width at the band ends on a mill train Optimizing the band width at the band ends on a mill train

1999-10-14

2002-07-09

Black, Thomas (Department: 2121)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Product assembly or manufacturing

C700S048000

Reexamination Certificate

active

06418354

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a method of optimizing the band width distribution at the end of a band passing through a mill train.
BACKGROUND INFORMATION
One of the main problems in rolling bands, for example, band steel, is achieving a basic rectangular shape with a width that is constant over the band length. Vertical upsetting rollers are used in the mill train to control the band width. If the upsetting rollers are operated with a constant setting, the band becomes usually narrower at the band ends, i.e., at the band head and the band foot, than in the mid-part due to The asymmetric material flow and other effects. In order to prevent this from occurring, the adjustment position of the upsetting rollers is adjustable during the passage of the band, the adjustment being widened with respect to the mid-part as the band ends pass through in the form of short excursions, also known as short strokes. This adjustment correction at the band head and band foot is performed according to a curve (Short Stroke Control-SSC curve), which can be defined by preset parameters.
SUMMARY
An object of the present invention is to produce a band width distribution at the band ends as close to the specified one as possible by providing a curve for the adjustment position of the upsetting rollers.
In In accordance with the present invention, the parameters for forming the curve according to which the position of the upsetting rollers is adjusted during the passage of the band ends are set on the basis of predictions concerning the rolling process using neural networks, with the prediction being continuously improved by on-line teaching of the neural networks on the rolling process. Preferably separate neural networks are used for the band head and the band foot. For consecutive passes of the same band, i.e., for several passes, separate neural networks may be used. If the number of passes is always the same, a single neural network can be used for determining the parameters of the curve of the upsetting rollers in the consecutive passes.


REFERENCES:
patent: 4248072 (1981-02-01), Hasegawa et al.
patent: 4570472 (1986-02-01), Kuwano
patent: 5085065 (1992-02-01), Onderka et al.
patent: 5193066 (1993-03-01), Konishi et al.
patent: 5414619 (1995-05-01), Katayama et al.
patent: 5740686 (1998-04-01), Martinetz et al.
patent: 5761066 (1998-06-01), Lettau et al.
patent: 5966682 (1999-10-01), Gramckow et al.
patent: 6098060 (2000-08-01), Yuan et al.
patent: 195 22 494 (1996-01-01), None
patent: 62 24 809 (1987-02-01), None
patent: 4 252302 (1992-09-01), None
patent: 06 023417 (1994-02-01), None
patent: 07 1 24 618 (1995-05-01), None
patent: 07 303909 (1995-11-01), None
patent: 96/01705 (1996-01-01), None
Marinetz et al, “Neuronale Netze zur Steuerung von Walzstrassen,” Automatisierungstechnische Praxis—ATP, vol. 38, No. 10, Pct. 1996, pp. 28, 30-32, 34-36, 41, 42. Listed in International Search Report.
Lindhoff et al., “Erfahrungen beim Einsatz neuronaler Netze in der Walzwerksautomatisierung,” Stahl und Eisen, vol. 114, No. 4, Apr. 18, 1994, pp. 49-53, 208. Listed in International Search Report.
Umeda et al., “Application of Predictive Control Theory in Hot Strip Mill,” Proceedings of the 1995 IEEE IECON: International Conference on Industrial Electronics, Control and Instrumentation, Orlando, Nov. 6-10, 1995 Signal Processing and Control, Robotics Vision and Sensors, Emerging Technologies and Factory Automation, vol. 2 of 2, Nov. 6, 1995, Institute of Electrical and Electronics Engineers, pp. 786-791, XP000559308. Listed in International Search Report.
Shaw et al., “LTV Steel Indiano Harbor Works' 85-IN. Hot Strip Mill Automatic Width Control Using Hydraulic Edger,” Iron and Steel Engineer, vol. 71, No. 8, Aug. 1, 1995, pp. 43-51 XP000465244. Listed in International Search Report.
Preuss et al., “Neuro-Fuzzy,” atp Automatisierungstechnische Praxis 36, 1994, 5, S. 11, 12, 14-18, 20-24. English abstract provided.
Siemens-Werbeschrift: “Ideas for Steel,” PA6942.5. English translation provided, no date.

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