EP1110634B1 - Control device for single or multiple stand rolling mills - Google Patents

Control device for single or multiple stand rolling mills Download PDF

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Publication number
EP1110634B1
EP1110634B1 EP00126993A EP00126993A EP1110634B1 EP 1110634 B1 EP1110634 B1 EP 1110634B1 EP 00126993 A EP00126993 A EP 00126993A EP 00126993 A EP00126993 A EP 00126993A EP 1110634 B1 EP1110634 B1 EP 1110634B1
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Prior art keywords
strip
rotational
control unit
speed
control device
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EP00126993A
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German (de)
French (fr)
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EP1110634A2 (en
EP1110634A3 (en
Inventor
Hans-Joachim Dipl.-Ing. Felkl
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Siemens AG
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Siemens AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions

Definitions

  • Such a control device is z. B. from DE-A-41 41st 742 known.
  • the invention is based on the object, a scheme of Band thickness of the rolling mill passing through the metal strip reach, where the outlet side mass flow of the rolling mill can be imprinted with high dynamics.
  • a second speed control unit having a z. B. as an S-roll trained inlet side roller assembly of the rolling train is assigned and by means of which the speed of the inlet side Roller arrangement as a function of the speed setpoint the outlet side roller assembly, the target band thickness of the Metal strip at the inlet of the rolling train and the deviation of the Band thickness of this target band thickness is adjustable, both the outlet and the inlet speed, the latter depending on the measured inlet thickness of the metal strip, and thus over the mass flow law the outlet thickness be fixed rigidly. This can be an improvement the achievable tolerances especially in dynamic Achieve transitional phases.
  • the second speed control unit associated with a control which the second speed control unit depending on the predefinable inlet side Target strip thickness and the deviation of the strip thickness controlled by this target band thickness.
  • This is the control the second speed control unit advantageous over a first mass flow control member to a strip thickness gauge connected, preferably in the strip running direction downstream arranged the inlet-side roller assembly of the rolling train is.
  • the inventive Control device advantageously a third speed control unit on, which is assigned to the rolling stand and by means of derer the speed of the roll stand in dependence of the predetermined for the outlet side roller assembly fixed Speed setpoint taking into account in the range the rolling stand occurring operating point shifts adjustable is.
  • the third speed control unit of the control device advantageously connected to a second mass flow control element, the at a in the tape running direction upstream of the Roll stand arranged first Bandzugmesselement and to a arranged in the strip running direction downstream of the roll stand second Bandzugmesselement is connected.
  • the rolling stand a Switzerlandregelhow, which is connected to the first Bandzugmesselement and by means of which the feed train of the rolling stand on the Employment of the same controlled by a first control algorithm is assigned, and a scaffolding unit, by means of derer via a second control algorithm and a drive the rolling mill as an actuator on a nip the mill stand constant train course is feasible.
  • a rolling mill shown in the single figure of the drawing has an inlet-side roller assembly 1, which, like can be seen from the figure, as S-roll 1 is formed.
  • tape direction follows downstream of the inlet side S-roll 1 a rolling stand 3, through the nip through the metal strip of an outlet side Roller assembly 4, also as an S-roll. 4 is formed, is supplied.
  • the invention is based on a one-armed Rolling mill shown; Of course it is, too possible, a control device according to the invention in multi-stand Walz Non use, in which case each of the outgoing S-roll 4 upstream rolling stand on the location of the roll stand 3 of the rolling mill according to the figure occurs.
  • the mass flow-oriented control device initially comprises a first speed control unit 5, which is associated with the roll-out side roller arrangement 4 of the rolling train designed as an S-roll 4.
  • a fixed speed is specified for the outlet side S-roll 4, whereby a roller peripheral speed is fixed for the outlet side S-roll 4, by a belt speed V 1 * of the metal strip leaving the rolling line is set.
  • the outlet-side S-roll 4 for the rolling train is a speed-controlled "Speedmaster".
  • the control device further includes a second speed control unit 6, which is assigned to the inlet side S-roll 1.
  • the second speed control unit 6 is therefore associated with a control element 7, which is connected via a first mass flow control member 8 with a belt thickness gauge 9, which is arranged downstream of the inlet side S-roll 1 in the rolling train. Furthermore, a calculated speed value Vo * is entered into the control element 7, which is determined as a function of the setpoint value V 1 * for the speed at the outlet side S-roll 4, ignoring any band thickness deviations. In the control element 7, this desired value V 0 * is superimposed with a correction quantity determined in the first mass flow control element 8 in accordance with the actual strip thickness of the metal strip detected in the strip thickness measuring device 9, so that the second speed control unit 6 regulates the inlet side S-roll 1 of the rolling train, taking into account the mass flow law ,
  • first speed control unit 5 and the second Speed control unit 6 will both the outlet and the entry speed, the latter taking into account actually measured at the inlet side of the rolling mill Band thickness of the metal strip, and thus on the mass flow law the outlet side strip thickness of the metal strip rigidly controlled.
  • the outlet side strip thickness of the metal strip rigidly controlled.
  • a third speed control unit 10 on, by means of which the speed and thus the roller peripheral speed of the rolling mill 3 can be controlled is.
  • the fixed predetermined outlet side belt speed V 1 * is entered as a base size. Furthermore, the third speed control unit 10 is associated with a second mass flow control member 11, which in turn is connected to a first Bandzugmesselement 12 arranged upstream of the roll stand 3 in the strip running direction and to a second strip tension measuring element 13 arranged downstream of the rolling stand 3 in the strip running direction.
  • Working point shifts of the roll stand 3 result in a change in the material lead, which can lead to strip thickness errors.
  • Such an operating point shift or the resulting material lead leads to differences between the measured value of the first strip tension element 12 and that of the second strip tension element 13. If such measured value differences occur, they are detected in the second mass flow control element 11 and taken into account in the creation of a correction quantity, with which in third speed control unit 10, the predetermined belt outlet speed V 1 * is superimposed.
  • a material advance resulting from working point offsets of the roll stand 3 is kept within very narrow limits, so that hardly any or no strip thickness errors of the metal strip can occur.
  • the intake run of the roll stand 3 is by means of a Switzerlandregelmati 14 on the employment of the rolling mill 3 by a controlled first control algorithm.
  • a Ceibismaschine 14 On the employment of the rolling mill 3 by a controlled first control algorithm.
  • a scaffold control unit 15 whose actuator is a drive of the roll stand 3.
  • the inventive control device is an improvement the strip thickness during rolling by mastering as Disturbance in control concepts acting according to the law of mass flow Material advance reached.
  • the outlet-side mass flow at the outlet side S-roll 4 is highly accurate by the Manipulated variables of the speed setpoints on the outlet side S-roll 4 impressed with their high dynamics. This is in the case of the control device according to the invention the target size or the strip thickness of the metal strip at the outlet side the rolling mill embossed and not more - as in the State of the art - a disturbance in the target size regulated.
  • the individual plant components of the rolling mill become into an associated parent, on the mass flow law embedded rule based concept.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Flow Control (AREA)

Abstract

The controller is constructed as a mass flow controller.

Description

Die Erfindung bezieht sich, gemäß Auspruch 1, auf eine Regeleinrichtung für eine Walzstraße mit mindestens einem Walzgerüst und einer bezüglich des Walzgerüsts auslaufseitigen, z. B. als S-Rolle ausgebildeten Rollenanordnung,

  • wobei die Regeleinrichtung als Massenflussregelung ausgebildet ist, mittels derer die Banddicke eines in der Walzstraße zu walzenden Metallbandes regelbar ist,
  • wobei die Regeleinrichtung eine der Rollenanordnung zugeordnete erste Drehzahlregelungseinheit aufweist, der ein Drehzahlsollwert vorgebbar ist.
The invention relates, according to claim 1, to a control device for a rolling mill with at least one rolling stand and with respect to the rolling stand outlet side, z. B. formed as an S-roll roller assembly,
  • wherein the control device is designed as a mass flow control, by means of which the strip thickness of a metal strip to be rolled in the rolling train is controllable,
  • wherein the control device has a first speed control unit assigned to the roller arrangement, to which a speed setpoint value can be predetermined.

Eine derartige Regeleinrichtung ist z. B. aus der DE-A-41 41 742 bekannt.Such a control device is z. B. from DE-A-41 41st 742 known.

Aus den Patent Abstracts of Japan zur JP-A-61 189 811 ist eine Regeleinrichtung für eine Walzstraße mit mindestens einem Walzgerüst und einer bezüglich des Walzgerüsts auslaufseitigen Rollenanordnung bekannt, die als Massenflussregelung ausgebildet ist und mittels derer de Banddicke eines in der Walzstraße zu walzenden Metallbandes regelbar ist.From the Patent Abstracts of Japan to JP-A-61 189 811 is a Control device for a rolling mill with at least one Roll stand and one with respect to the rolling stand outlet side Roller assembly known, which is designed as a mass flow control is and by means of which de band thickness one in the Walzstraße is adjustable to rolling metal band.

Ähnliche Offenbarungsgehalte sind der DE-A-2 129 629 und der EP-A-0 063 633 zu entnehmen.Similar disclosure contents are DE-A-2 129 629 and EP-A-0 063 633.

Bei bekannten derartigen Regeleinrichtungen ist üblicherweise das auslaufseitige, letzte Walzgerüst einer Walzstraße als Speedmaster der Walzstraße ausgebildet. Die auslaufseitige Bandgeschwindigkeit des Metallbandes ist mit der Walzenumfangsgeschwindigkeit des letzten Walzgerüsts, die der Speedmaster regelt, über die Materialvoreilung verknüpft. Veränderungen der Materialvoreilung, die aus Arbeitspunktverschiebungen resultieren, bewirken Banddickenfehler. Die vorstehend erwähnten Arbeitspunktverschiebungen am letzten Walzgerüst der Walzstraße werden z.B. durch Änderungen der Walzspaltschmierung, der Bandzüge, der Abnahme und dgl. hervorgerufen.In known such control devices is usually the outlet side, last rolling stand of a rolling mill as Speedmaster formed the rolling mill. The outlet side Belt speed of the metal belt is at the roller peripheral speed of the last rolling stand, which the Speedmaster regulates, linked over the material advance. Changes in material advance resulting from working point shifts result in band thickness errors. The above-mentioned operating point shifts on the last Roll stand of the rolling mill are e.g. through changes in the Rolling gap lubrication, the strip tension, the decrease and the like. Created.

Der Erfindung liegt die Aufgabe zugrunde, eine Regelung der Banddicke des die Walzstraße durchlaufenden Metallbandes zu erreichen, bei der der auslaufseitige Massenfluss der Walzstraße mit hoher Dynamik einprägbar ist.The invention is based on the object, a scheme of Band thickness of the rolling mill passing through the metal strip reach, where the outlet side mass flow of the rolling mill can be imprinted with high dynamics.

Die Aufgabe wird dadurch gelöst,

  • dass der ersten Drehzahlregelungseinheit ein fester Drehzahlsollwert vorgebbar ist, der gleich einer auslaufseitigen Sollbandgeschwindigkeit des zu walzenden Metallbandes ist, und
  • dass die auslaufseitige Rollenanordnung durch die drehzahlkonstante Regelung durch die erste Drehzahlregelungseinheit als Speedmaster der Walzstraße betreibbar ist.
The task is solved by
  • that the first speed control unit, a fixed speed setpoint is predetermined, which is equal to an outlet side target belt speed of the metal strip to be rolled, and
  • the outlet-side roller arrangement can be operated by the speed-constant control by the first speed control unit as Speedmaster of the rolling train.

Wenn die erfindungsgemäße Regeleinrichtung eine zweite Drehzahlregelungseinheit aufweist, die einer z. B. als S-Rolle ausgebildeten einlaufseitigen Rollenanordnung der Walzstraße zugeordnet ist und mittels derer die Drehzahl der einlaufseitigen Rollenanordnung in Abhängigkeit vom Drehzahlsollwert der auslaufseitigen Rollenanordnung, der Sollbanddicke des Metallbandes am Einlauf der Walzstraße und der Abweichung der Banddicke von dieser Sollbanddicke regelbar ist, können sowohl die Auslauf- als auch die Einlaufgeschwindigkeit, letztere in Abhängigkeit von der gemessenen Einlaufdicke des Metallbandes, und damit über das Massenflußgesetz die Auslaufdicke starr geregelt werden. Hierdurch läßt sich eine Verbesserung der erreichbaren Toleranzen vor allem in dynamischen Übergangsphasen erreichen.If the control device according to the invention a second speed control unit having a z. B. as an S-roll trained inlet side roller assembly of the rolling train is assigned and by means of which the speed of the inlet side Roller arrangement as a function of the speed setpoint the outlet side roller assembly, the target band thickness of the Metal strip at the inlet of the rolling train and the deviation of the Band thickness of this target band thickness is adjustable, both the outlet and the inlet speed, the latter depending on the measured inlet thickness of the metal strip, and thus over the mass flow law the outlet thickness be fixed rigidly. This can be an improvement the achievable tolerances especially in dynamic Achieve transitional phases.

Zweckmäßigerweise ist der zweiten Drehzahlregelungseinheit ein Steuerelement zugeordnet, welches die zweite Drehzahlregelungseinheit in Abhängigkeit von der vorgebbaren einlaufseitigen Sollbanddicke und der Abweichung der Banddicke von dieser Sollbanddicke steuert. Hierzu ist das Steuerelement der zweiten Drehzahlregelungseinheit vorteilhaft über ein erstes Massenflussregelglied an ein Banddickenmessgerät angeschlossen, das vorzugsweise in Bandlaufrichtung stromab der einlaufseitigen Rollenanordnung der Walzstraße angeordnet ist.Conveniently, the second speed control unit associated with a control which the second speed control unit depending on the predefinable inlet side Target strip thickness and the deviation of the strip thickness controlled by this target band thickness. This is the control the second speed control unit advantageous over a first mass flow control member to a strip thickness gauge connected, preferably in the strip running direction downstream arranged the inlet-side roller assembly of the rolling train is.

Zur Beherrschung der Materialvoreilung weist die erfindungsgemäße Regeleinrichtung vorteilhaft eine dritte Drehzahlregelungseinheit auf, die dem Walzgerüst zugeordnet ist und mittels derer die Drehzahl des Walzgerüsts in Abhängigkeit von dem für die auslaufseitige Rollenanordnung vorgegebenen festen Drehzahlsollwert unter Berücksichtigung von im Bereich des Walzgerüsts auftretenden Arbeitspunktverschiebungen regelbar ist.To control the material advance, the inventive Control device advantageously a third speed control unit on, which is assigned to the rolling stand and by means of derer the speed of the roll stand in dependence of the predetermined for the outlet side roller assembly fixed Speed setpoint taking into account in the range the rolling stand occurring operating point shifts adjustable is.

Hierzu ist die dritte Drehzahlregelungseinheit der Regeleinrichtung vorteilhaft an ein zweites Massenflussregelglied angeschlossen, das an ein in Bandlaufrichtung stromauf des Walzgerüsts angeordnetes erstes Bandzugmesselement und an ein in Bandlaufrichtung stromab des Walzgerüsts angeordnetes zweites Bandzugmesselement angeschlossen ist.For this purpose, the third speed control unit of the control device advantageously connected to a second mass flow control element, the at a in the tape running direction upstream of the Roll stand arranged first Bandzugmesselement and to a arranged in the strip running direction downstream of the roll stand second Bandzugmesselement is connected.

Des weiteren sind bei einer vorteilhaften Ausführungsform der erfindungsgemäßen Regeleinrichtung dem Walzgerüst eine Zugregeleinheit, die an das erste Bandzugmesselement angeschlossen und mittels derer der Einlaufzug des Walzgerüsts über die Anstellung desselben durch einen ersten Regelalgorithmus kontrollierbar ist, und eine Gerüstregeleinheit zugeordnet, mittels derer über einen zweiten Regelalgorithmus und einen Antrieb des Walzgerüsts als Stellglied ein über einen Walzspalt des Walzgerüsts konstanter Zugverlauf realisierbar ist.Furthermore, in an advantageous embodiment of the Control device according to the invention, the rolling stand a Zugregeleinheit, which is connected to the first Bandzugmesselement and by means of which the feed train of the rolling stand on the Employment of the same controlled by a first control algorithm is assigned, and a scaffolding unit, by means of derer via a second control algorithm and a drive the rolling mill as an actuator on a nip the mill stand constant train course is feasible.

Im folgenden wird die Erfindung an Hand einer Ausführungsform unter Bezugnahme auf die Zeichnung näher erläutert, in deren einziger Figur das massenflussorientierte Regelungskonzept einer erfindungsgemäßen Regeleinrichtung für ein- oder mehrgerüstige Walzstraßen in Verbindung mit einer eingerüstigen Walzstraße prinzipiell dargestellt ist.In the following the invention with reference to an embodiment explained in more detail with reference to the drawing, in whose only figure the mass flow-oriented control concept a control device according to the invention for one or more scaffolding Rolling mills in conjunction with a one-armed Walzstraße is shown in principle.

Eine in der einzigen Figur der Zeichnung dargestellte Walzstraße hat eine einlaufseitige Rollenanordnung 1, die, wie sich aus der Figur ergibt, als S-Rolle 1 ausgebildet ist. In einer durch einen Pfeil 2 gekennzeichneten Bandlaufrichtung folgt stromab der einlaufseitigen S-Rolle 1 ein Walzgerüst 3, durch dessen Walzenspalt hindurch das Metallband einer auslaufseitigen Rollenanordnung 4, die ebenfalls als S-Rolle 4 ausgebildet ist, zugeführt wird.A rolling mill shown in the single figure of the drawing has an inlet-side roller assembly 1, which, like can be seen from the figure, as S-roll 1 is formed. In a marked by an arrow 2 tape direction follows downstream of the inlet side S-roll 1 a rolling stand 3, through the nip through the metal strip of an outlet side Roller assembly 4, also as an S-roll. 4 is formed, is supplied.

In der Figur wird die Erfindung an Hand einer eingerüstigen Walzstraße dargestellt; selbstverständlich ist es jedoch auch möglich, eine erfindungsgemäße Regeleinrichtung bei mehrgerüstigen Walzstraßen einzusetzen, wobei dann jeweils das der auslaufseitigen S-Rolle 4 stromauf angeordnete Walzgerüst an die Stelle des Walzgerüsts 3 der Walzstraße gemäß der Figur tritt.In the figure, the invention is based on a one-armed Rolling mill shown; Of course it is, too possible, a control device according to the invention in multi-stand Walzstraßen use, in which case each of the outgoing S-roll 4 upstream rolling stand on the location of the roll stand 3 of the rolling mill according to the figure occurs.

Die massenflussorientierte erfindungsgemäße Regeleinrichtung umfasst zunächst eine erste Drehzahlregelungseinheit 5, welche der als S-Rolle 4 ausgebildeten auslaufseitigen Rollenanordnung 4 der Walzstraße zugeordnet ist. Mittels der ersten Drehzahlregelungseinheit 5 wird für die auslaufseitige S-Rolle 4 eine feste Drehzahl vorgegeben, wodurch für die auslaufseitige S-Rolle 4 eine Rollenumfangsgeschwindigkeit fixiert wird, durch die eine Bandgeschwindigkeit V1* des die Walzstraße auslaufseitig verlassenden Metallbandes festgelegt wird. Entsprechend ist die auslaufseitige S-Rolle 4 für die Walzstraße ein geschwindigkeitsgeregelter "Speedmaster".The mass flow-oriented control device according to the invention initially comprises a first speed control unit 5, which is associated with the roll-out side roller arrangement 4 of the rolling train designed as an S-roll 4. By means of the first speed control unit 5, a fixed speed is specified for the outlet side S-roll 4, whereby a roller peripheral speed is fixed for the outlet side S-roll 4, by a belt speed V 1 * of the metal strip leaving the rolling line is set. Accordingly, the outlet-side S-roll 4 for the rolling train is a speed-controlled "Speedmaster".

Zur erfindungsgemäßen Regeleinrichtung gehört des weiteren eine zweite Drehzahlregelungseinheit 6, die der einlaufseitigen S-Rolle 1 zugeordnet ist. Diese zweite Drehzahlregelungseinheit 6 regelt die Drehzahl der einlaufseitigen S-Rolle 1, so dass sich für die Rollenumfangsgeschwindigkeit der einlaufseitigen S-Rolle 1 und damit für die einlaufseitige Bandgeschwindigkeit des die Walzstraße durchlaufenden Metallbandes eine Geschwindigkeit von V0*dyn = V1*x H1*H0* + Δh0 ergibt.The control device according to the invention further includes a second speed control unit 6, which is assigned to the inlet side S-roll 1. This second speed control unit 6 controls the rotational speed of the inlet side S-roll 1, so that for the roller peripheral speed of the inlet side S-roll 1 and thus for the inlet side belt speed of the metal strip passing through the rolling line a speed of V0 * dyn = V 1 * x H 1 * H 0 * + Δh 0 results.

In dieser Gleichung stehen

  • V0*dyn für den Sollwert der einlaufseitigen Bandgeschwindigkeit des Metallbandes,
  • V1* für den Sollwert der auslaufseitigen Bandgeschwindigkeit des Metallbandes,
  • Hi* für den Sollwert der auslaufseitigen Banddicke des Metallbandes,
  • H0* für den Sollwert der einlaufseitigen Banddicke des Metallbandes und
  • Δh0 für die einlaufseitige Abweichung der Banddicke des Metallbandes vom einlaufseitigen Sollwert der Banddicke des Metallbandes.
    • Stand in this equation
  • V 0 * dyn for the nominal value of the inlet-side strip speed of the metal strip,
  • V 1 * for the nominal value of the outlet side strip speed of the metal strip,
  • Hi * for the nominal value of the outlet side strip thickness of the metal strip,
  • H 0 * for the setpoint of the inlet side strip thickness of the metal strip and
  • Δh 0 for the inlet side deviation of the strip thickness of the metal strip from the inlet setpoint value of the strip thickness of the metal strip.

    • Der zweiten Drehzahlregelungseinheit 6 ist daher ein Steuerelement 7 zugeordnet, das über ein erstes Massenflussregelglied 8 mit einem Banddickenmessgerät 9 verbunden ist, das stromab der einlaufseitigen S-Rolle 1 in der Walzstraße angeordnet ist. Des weiteren wird in das Steuerelement 7 ein errechneter Geschwindigkeitswert Vo* eingegeben, der in Abhängigkeit vom Sollwert V1* für die Geschwindigkeit an der auslaufseitigen S-Rolle 4 unter Nichtberücksichtigung etwaiger Banddickenabweichungen ermittelt wird. In dem Steuerelement 7 wird dieser Sollwert V0* mit einer im ersten Massenflussregelglied 8 entsprechend der tatsächlichen, im Banddickenmessgerät 9 erfassten Banddicke des Metallbandes ermittelten Korrekturgröße überlagert, so dass die zweite Drehzahlregelungseinheit 6 die einlaufseitige S-Rolle 1 der Walzstraße unter Berücksichtigung des Massenflussgesetzes regelt.The second speed control unit 6 is therefore associated with a control element 7, which is connected via a first mass flow control member 8 with a belt thickness gauge 9, which is arranged downstream of the inlet side S-roll 1 in the rolling train. Furthermore, a calculated speed value Vo * is entered into the control element 7, which is determined as a function of the setpoint value V 1 * for the speed at the outlet side S-roll 4, ignoring any band thickness deviations. In the control element 7, this desired value V 0 * is superimposed with a correction quantity determined in the first mass flow control element 8 in accordance with the actual strip thickness of the metal strip detected in the strip thickness measuring device 9, so that the second speed control unit 6 regulates the inlet side S-roll 1 of the rolling train, taking into account the mass flow law ,

    Mit der ersten Drehzahlregelungseinheit 5 und der zweiten Drehzahlregelungseinheit 6 wird sowohl die Auslauf- als auch die Einlaufgeschwindigkeit, letztere unter Berücksichtigung der tatsächlich an der Einlaufseite der Walzstraße gemessenen Banddicke des Metallbandes, und damit über das Massenflussgesetz die auslaufseitige Banddicke des Metallbandes starr geregelt. Hierdurch kann insbesondere in dynamischen Übergangsphasen eine Verbesserung der erreichbaren Toleranzen erwartet werden.With the first speed control unit 5 and the second Speed control unit 6 will both the outlet and the entry speed, the latter taking into account actually measured at the inlet side of the rolling mill Band thickness of the metal strip, and thus on the mass flow law the outlet side strip thickness of the metal strip rigidly controlled. As a result, in particular in dynamic transition phases expected to improve the achievable tolerances become.

    Um die Materialvoreilung, die bei Regelkonzepten nach dem Massenflussgesetz als Störgröße wirkt, zu beherrschen, weist die erfindungsgemäße Regeleinrichtung eine dritte Drehzahlregelungseinheit 10 auf, mittels derer die Drehzahl und damit die Walzenumfangsgeschwindigkeit des Walzengerüsts 3 regelbar ist.To the material advance, which in rule concepts after the Mass flow law acts as a disturbance to dominate, points the control device according to the invention, a third speed control unit 10 on, by means of which the speed and thus the roller peripheral speed of the rolling mill 3 can be controlled is.

    In die dritte Drehzahlregelungseinheit 10 wird die fest vorgegebene auslaufseitige Bandgeschwindigkeit V1* als Basisgröße eingegeben. Des weiteren ist der dritten Drehzahlregelungseinheit 10 ein zweites Massenflussregelglied 11 zugeordnet, welches seinerseits an ein in Bandlaufrichtung stromauf des Walzgerüsts 3 angeordnetes erstes Bandzugmesselement 12 und an ein in Bandlaufrichtung stromab des Walzgerüsts 3 angeordnetes zweites Bandzugmesselement 13 angeschlossen ist.In the third speed control unit 10, the fixed predetermined outlet side belt speed V 1 * is entered as a base size. Furthermore, the third speed control unit 10 is associated with a second mass flow control member 11, which in turn is connected to a first Bandzugmesselement 12 arranged upstream of the roll stand 3 in the strip running direction and to a second strip tension measuring element 13 arranged downstream of the rolling stand 3 in the strip running direction.

    Arbeitspunktverschiebungen des Walzgerüsts 3 haben eine Veränderung der Materialvoreilung zur Folge, welche zu Banddickenfehlern führen kann. Eine solche Arbeitspunktverschiebung bzw. die daraus resultierende Materialvoreilung führt zu Differenzen zwischen dem Messwert des ersten Bandzugelements 12 und demjenigen des zweiten Bandzugelements 13. Wenn derartige Messwertdifferenzen auftreten, werden sie im zweiten Massenflussregelglied 11 erfasst und bei der Schaffung einer Korrekturgröße berücksichtigt, mit welcher in der dritten Drehzahlregelungseinheit 10 die vorgegebene Bandauslaufgeschwindigkeit V1* überlagert wird. Hierdurch wird eine aus Arbeitspunktverschiebungen des Walzgerüsts 3 resultierende Materialvoreilung in engsten Grenzen gehalten, so dass kaum bzw. keine Banddickenfehler des Metallbandes auftreten können.Working point shifts of the roll stand 3 result in a change in the material lead, which can lead to strip thickness errors. Such an operating point shift or the resulting material lead leads to differences between the measured value of the first strip tension element 12 and that of the second strip tension element 13. If such measured value differences occur, they are detected in the second mass flow control element 11 and taken into account in the creation of a correction quantity, with which in third speed control unit 10, the predetermined belt outlet speed V 1 * is superimposed. As a result, a material advance resulting from working point offsets of the roll stand 3 is kept within very narrow limits, so that hardly any or no strip thickness errors of the metal strip can occur.

    Der Einlaufzug des Walzgerüsts 3 wird mittels einer Zugregeleinheit 14 über die Anstellung des Walzgerüsts 3 durch einen ersten Regelalgorithmus kontrolliert. Für einen konstanten Zugverlauf über den Walzspalt des Walzgerüsts 3 sorgt mit Hilfe eines zweiten Regelalgorithmus eine Gerüstregeleinheit 15, deren Stellglied ein Antrieb des Walzgerüsts 3 ist.The intake run of the roll stand 3 is by means of a Zugregeleinheit 14 on the employment of the rolling mill 3 by a controlled first control algorithm. For a constant Zugverlauf over the nip of the roll stand 3 ensures with Help a second control algorithm a scaffold control unit 15, whose actuator is a drive of the roll stand 3.

    Durch die erfindungsgemäße Regeleinrichtung wird eine Verbesserung der Banddicke beim Walzen durch Beherrschung der als Störgröße bei Regelkonzepten nach dem Massenflussgesetz wirkenden Materialvoreilung erreicht. Der auslaufseitige Massenfluss an der auslaufseitigen S-Rolle 4 wird durch die hochgenauen Stellgrößen der Geschwindigkeitssollwerte an der auslaufseitigen S-Rolle 4 mit deren hoher Dynamik eingeprägt. Damit wird im Falle der erfindungsgemäßen Regeleinrichtung die Zielgröße bzw. die Banddicke des Metallbandes an der Auslaufseite der Walzstraße eingeprägt und nicht mehr - wie beim Stand der Technik - eine Störung in der Zielgröße ausgeregelt. Die einzelnen Anlagenkomponenten der Walzstraße werden in ein zugehöriges übergeordnetes, auf dem Massenflussgesetz beruhendes Regelkonzept eingebettet.The inventive control device is an improvement the strip thickness during rolling by mastering as Disturbance in control concepts acting according to the law of mass flow Material advance reached. The outlet-side mass flow at the outlet side S-roll 4 is highly accurate by the Manipulated variables of the speed setpoints on the outlet side S-roll 4 impressed with their high dynamics. This is in the case of the control device according to the invention the target size or the strip thickness of the metal strip at the outlet side the rolling mill embossed and not more - as in the State of the art - a disturbance in the target size regulated. The individual plant components of the rolling mill become into an associated parent, on the mass flow law embedded rule based concept.

    Claims (7)

    1. Control device for a rolling mill train having at least one rolling stand (3) and a roller arrangement (4) which is on the outlet side with respect to the rolling stand (3) and is designed, for example, as an S roller,
      the control device being designed as a mass flow controller which can be used to control the strip thickness of a metal strip which is to be rolled in the rolling mill train,
      the control device having a first rotational-speed control unit (5) assigned to the roller arrangement (4), characterized in that
      a fixed set rotational speed value for the outlet-side roller arrangement (4), which defines an outlet-side set strip velocity (V1*) of the metal strip which is to be rolled, can be preset for the first rotational-speed control unit (5), and in that
      the outlet-side roller arrangement (4), as a result of the constant-rotational-speed control provided by the first rotational-speed control unit (5) can be operated as the speedmaster of the rolling mill train.
    2. Control device according to Claim 1, which has a second rotational-speed control unit (6) which is assigned to an inlet-side roller arrangement (1), designed for example as an S roller, of the rolling mill train and by means of which it is possible to control the rotational speed of the inlet-side roller arrangement (1) as a function of the set rotational speed value (V1*) of the outlet-side roller arrangement (4), the set strip thickness (H0*) of the metal strip at the inlet of the rolling mill train and the deviation (Δh0) in the strip thickness from this set strip thickness (H0*).
    3. Control device according to Claim 2, in which the second rotational-speed control unit (6) is assigned a control element (7) which controls the second rotational-speed control unit (6) as a function of the presetable inlet-side set strip thickness (H0*) and the deviation (Δh0) in the strip thickness from this set strip thickness (H0*).
    4. Control device according to Claim 3, in which the control element (7) of the second rotational-speed control unit (6) is connected to a strip-thickness measuring appliance (9) via a first mass flow control member (8).
    5. Control device according to one of Claims 1 to 4, which has a third rotational-speed control unit (10) which is assigned to the rolling stand (3) and can be used to control the rotational speed of the rolling stand (3) as a function of the fixed set rotational speed value (V1*) which has been preset for the outlet-side roller arrangement (4), taking into account working point shifts which occur in the region of the rolling stand (3).
    6. Control device according to Claim 5, in which the third rotational-speed control unit (10) is connected to a second mass flow control member (11), which in turn is connected to a first strip tension measuring element (12), arranged upstream of the rolling stand (3) in the strip running direction, and to a second strip tension measuring element (13), arranged downstream of the rolling stand (3) in the strip running direction.
    7. Control device according to Claim 6, in which the rolling stand (3) is assigned a tension control unit (14), which is connected to the first strip tension measuring element (12) and can be used to monitor the inlet tension of the rolling stand (3) by means of the adjustment of the latter using a first control algorithm, and a stand control unit (15), which can be used, via a second control algorithm and a drive of the rolling stand (3) as actuator, to realize a tension profile which is constant across a roll nip of the rolling stand (3).
    EP00126993A 1999-12-22 2000-12-08 Control device for single or multiple stand rolling mills Expired - Lifetime EP1110634B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19962183 1999-12-22
    DE19962183A DE19962183A1 (en) 1999-12-22 1999-12-22 Control device for single or multi-stand rolling mills

    Publications (3)

    Publication Number Publication Date
    EP1110634A2 EP1110634A2 (en) 2001-06-27
    EP1110634A3 EP1110634A3 (en) 2003-03-12
    EP1110634B1 true EP1110634B1 (en) 2005-02-16

    Family

    ID=7933919

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00126993A Expired - Lifetime EP1110634B1 (en) 1999-12-22 2000-12-08 Control device for single or multiple stand rolling mills

    Country Status (4)

    Country Link
    EP (1) EP1110634B1 (en)
    AT (1) ATE289228T1 (en)
    DE (2) DE19962183A1 (en)
    ES (1) ES2235752T3 (en)

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3636743A (en) * 1970-06-15 1972-01-25 Allegheny Ludlum Ind Inc Rolling mill control system
    DE3174969D1 (en) * 1981-04-29 1986-08-28 Kawasaki Steel Co Automatic control methods and devices for rolling mills
    JPS61189811A (en) * 1985-02-15 1986-08-23 Sumitomo Metal Ind Ltd Control method of plate thickness
    DE4141742A1 (en) * 1991-12-13 1993-06-17 Licentia Gmbh Method to regulate rolling stock thickness in strip rolling mill - uses mass flow regulation and formula to calculate initial strip thickness, for direct influence on roller position

    Also Published As

    Publication number Publication date
    ATE289228T1 (en) 2005-03-15
    EP1110634A2 (en) 2001-06-27
    ES2235752T3 (en) 2005-07-16
    DE50009545D1 (en) 2005-03-24
    EP1110634A3 (en) 2003-03-12
    DE19962183A1 (en) 2001-07-12

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