EP1110634A2 - 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
EP1110634A2
EP1110634A2 EP00126993A EP00126993A EP1110634A2 EP 1110634 A2 EP1110634 A2 EP 1110634A2 EP 00126993 A EP00126993 A EP 00126993A EP 00126993 A EP00126993 A EP 00126993A EP 1110634 A2 EP1110634 A2 EP 1110634A2
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Prior art keywords
outlet
speed
side roller
control device
control unit
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Granted
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EP00126993A
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German (de)
French (fr)
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EP1110634B1 (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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Publication of EP1110634A3 publication Critical patent/EP1110634A3/en
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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

  • the invention relates to a control device for or multi-stand rolling mills, by means of which the strip thickness of metal strips manufactured in the rolling mill can be regulated.
  • the invention has for its object to be a more effective Regulation of the strip thickness of the line passing through the rolling mill To reach the metal strip.
  • the Control device designed as a mass flow control device is.
  • the mass flow on the outlet side highly precise manipulated variables of the speed setpoints on the Discharge side of the rolling mill stamped with high dynamics, if the mass flow control device has a first speed control unit which one e.g. trained as an S-role outlet-side roller arrangement assigned to the rolling mill and by means of the outlet-side roller arrangement as Speedmaster trainer and for the outlet-side reel arrangement a fixed speed can be specified.
  • a first speed control unit which one e.g. trained as an S-role outlet-side roller arrangement assigned to the rolling mill and by means of the outlet-side roller arrangement as Speedmaster trainer and for the outlet-side reel arrangement a fixed speed can be specified.
  • the target size reached namely the desired target strip thickness of the metal strip
  • the control concept on the outlet side of the rolling mill be impressed, whereas in the case of the above state of the art described only interference can be adjusted in the target size.
  • a second speed control unit which one e.g. as an S-roll trained entry-side roller arrangement of the rolling mill assigned and by means of the speed of the inlet side Roller arrangement depending on the speed of the outlet side Roll arrangement, the target strip thickness of the metal strip at the entry of the rolling mill and the deviation of the strip thickness of this nominal strip thickness can be regulated, both the outlet as well as the infeed speed, the latter depending from the measured inlet thickness of the metal strip, and thus rigidly regulates the outlet thickness via the mass flow law become. This can improve the achievable Tolerances especially in dynamic transition phases to reach.
  • the second speed control unit is expedient a control element associated with the second speed control unit depending on the specifiable inlet side Target strip thickness and the deviation of the strip thickness controls from this target strip thickness.
  • the invention Control device advantageously a third speed control unit on the one upstream of the outlet side Roller arrangement arranged roll stand of the rolling mill is assigned and by means of which the speed of the upstream the roller assembly arranged on the outlet side depending on that for the outlet-side roller arrangement given fixed speed taking into account from in the area of the upstream of the outlet-side roller arrangement arranged work stand shifts occurring is adjustable.
  • the third speed control unit of the control device advantageously connected to a second mass flow control element, that to an upstream in the tape running direction arranged upstream of the outlet-side roller arrangement Arranged first roll tension measuring element and on a downstream of the upstream in the strip running direction Roller arrangement arranged roller stand arranged second Bandzugmeßelement is connected.
  • control device upstream of the outlet side Roller arrangement arranged roll stand a tension control unit, which are connected to the first belt tension measuring element and by means of which the inlet train of the roll stand over the Setting the same controllable by a first control algorithm is, and assigned a scaffold control unit, by means of via a second control algorithm and a drive of the roll stand as an actuator via a roll gap constant roll course can be realized is.
  • a rolling mill shown in the single figure of the drawing has an entry-side roller arrangement that, like results from the figure, is designed as an S-roll 1.
  • the invention is illustrated with one arm Rolling mill shown; however, it is also a matter of course possible, a control device according to the invention with multi-stand Rolling mills to be used, in which case the outlet-side S-roll 4 upstream arranged roll stand in place of the roll stand 3 of the rolling mill according to the Figure kicks.
  • the mass flow-oriented control device initially comprises a first speed control unit 5, which is assigned to the outlet-side roller arrangement of the rolling mill designed as an S-roller 4.
  • the first speed control unit 5 specifies a fixed speed for the exit-side S-roll 4, as a result of which a peripheral circumferential speed is fixed for the exit-side S-roll 4, by means of which a strip speed V1 * of the metal strip leaving the rolling mill is determined.
  • the outlet-side S-roller 4 is accordingly a speed-controlled "Speedmaster" for the rolling mill.
  • the control device also includes a second speed control unit 6, which is assigned to the inlet-side S-roller 1.
  • the second speed control unit 6 is therefore assigned a control element 7, which is connected via a first mass flow control element 8 to a strip thickness measuring device 9, which is arranged downstream of the inlet-side S-roll 1 in the rolling mill. Furthermore, a calculated speed value V 0 * is entered into the control element 7, which is determined as a function of the target value for the speed on the outlet-side S-roll 4, taking into account any strip thickness deviations. In the control element 7, this setpoint V 0 * is overlaid 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 controls the inlet-side S-roller 1 of the rolling mill taking into account the mass flow law .
  • first speed control unit 5 and the second Speed control unit 6 is both the discontinued and the running-in speed, the latter taking into account the one actually measured on the inlet side of the rolling mill Strip thickness of the metal strip, and thus about the mass flow law the outlet-side strip thickness of the metal strip is rigidly regulated. In this way, especially in dynamic transition phases an improvement in the achievable tolerances is expected become.
  • the third speed control unit 10 the fixedly specified exit-side belt speed V 1 * is entered as the basic variable. Furthermore, the third speed control unit 10 is assigned a second mass flow control element 11, which in turn is connected to a first strip tension measuring element 12 arranged upstream of the roll stand 3 and to a second strip tension measuring element arranged downstream of the roll stand 3 in the strip running direction.
  • Working point shifts of the roll stand 3 result in a change in the material advance, which can lead to strip thickness errors.
  • Such an operating point shift or the resulting material advance 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 recorded in the second mass flow control element 11 and taken into account when creating a correction variable with which in the third speed control unit 10, the predetermined tape exit speed V 1 * is superimposed.
  • a material advance resulting from working point displacements of the roll stand 3 is kept within narrow limits, so that hardly or no strip thickness errors of the metal strip can occur.
  • the inlet train of the roll stand 3 is by means of a train control unit 14 on the employment of the roll stand 3 by controls a first control algorithm.
  • a train control unit 14 controls a first control algorithm.
  • Train course over the roll gap of the roll stand 3 ensures a scaffold control unit with the help of a second control algorithm 15, the actuator of which drives the roll stand 3 is.
  • the control device is an improvement the strip thickness during rolling by mastering the as Disturbance in control concepts acting according to the mass flow law Material lead reached.
  • the outlet-side mass flow on the outlet-side S-roll 4 is due to the highly accurate Command values of the speed setpoints on the outlet side S-roll 4 embossed with its high dynamics.
  • the target size or the strip thickness of the metal strip on the outlet side stamped on the rolling mill and no longer - as with the State of the art - a disturbance in the target size corrected.
  • the individual plant components of the rolling mill are in an associated parent, on the mass flow law based control concept embedded.

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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 auf eine Regeleinrichtung für ein-oder mehrgerüstige Walzstraßen, mittels der die Banddicke von in der Walzstraße gefertigten Metallbändern regelbar ist.The invention relates to a control device for or multi-stand rolling mills, by means of which the strip thickness of metal strips manufactured in the rolling mill can be regulated.

Bei bekannten derartigen Regeleinrichtungen ist üblicherweise das auslaufseitige, letzte Walzengerüst einer Walzstraße als Speedmaster der Walzstraße ausgebildet. Die auslaufseitige Bandgeschwindigkeit des Metallbandes ist mit der Walzenumfangsgeschwindigkeit des letzten Walzengerüsts, die der Speedmaster regelt, über die Materialvoreilung verknüpft. Veränderungen der Materialvoreilung, die aus Arbeitspunktverschiebungen resultieren, bewirken Banddickenfehler. Die vorstehend erwähnten Arbeitspunktverschiebungen am letzten Walzengerüst der Walzstraße werden z.B. durch Änderungen der Walzspaltschmierung, der Bandzüge, der Abnahme und dgl. hervorgerufen.In known control devices of this type is common the outlet-side, last roll stand of a rolling mill as Speedmaster trained on the rolling mill. The outlet side Belt speed of the metal belt is at the roller circumferential speed of the last roll stand that the Speedmaster controls, linked via the material advance. Changes in material lead resulting from working point shifts result in band thickness errors. The last-mentioned shifts in operating point Roll stands of the rolling mill are e.g. by changing the Roll gap lubrication, the strip tension, the acceptance and the like.

Diese aufgetretenen Banddickenfehler werden mittels eines stromab des letzten Walzengerüsts der Walzstraße angeordneten auslaufseitigen Banddickenmeßgeräts erfaßt und durch eine langsame, totzeitbehaftete Monitorregelung ausgeregelt.These occurring band thickness errors are identified by means of a arranged downstream of the last roll stand of the rolling mill outlet-side strip thickness measuring device and detected by a slow, dead time-dependent monitor control corrected.

Der Erfindung liegt die Aufgabe zugrunde, eine wirksamere Regelung der Banddicke des die Walzstraße durchlaufenden Metallbandes zu erreichen.The invention has for its object to be a more effective Regulation of the strip thickness of the line passing through the rolling mill To reach the metal strip.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Regeleinrichtung als Massenflußregeleinrichtung ausgebildet ist. Hierbei wird der auslaufseitige Massenfluß über die hochgenauen Stellgrößen der Geschwindigkeitssollwerte an der Auslaufseite der Walzstraße mit hoher Dynamik eingeprägt, wenn die Massenflußregeleinrichtung eine erste Drehzahlregelungseinheit aufweist, die einer z.B. als S-Rolle ausgebildeten auslaufseitigen Rollenanordnung der Walzstraße zugeordnet und mittels der die auslaufseitige Rollenanordnung als Speedmaster ausbild- und für die auslaufseitige Rollenanordnung eine feste Drehzahl vorgebbar ist. Hierdurch kann die zu erreichende Zielgröße, nämlich die gewünschte Sollbanddicke des Metallbandes, an der Auslaufseite der Walzstraße dem Regelkonzept eingeprägt werden, wohingegen im Falle des vorstehend geschilderten Standes der Technik lediglich Störungen in der Zielgröße ausregelbar sind.This object is achieved in that the Control device designed as a mass flow control device is. Here, the mass flow on the outlet side highly precise manipulated variables of the speed setpoints on the Discharge side of the rolling mill stamped with high dynamics, if the mass flow control device has a first speed control unit which one e.g. trained as an S-role outlet-side roller arrangement assigned to the rolling mill and by means of the outlet-side roller arrangement as Speedmaster trainer and for the outlet-side reel arrangement a fixed speed can be specified. This allows the target size reached, namely the desired target strip thickness of the metal strip, the control concept on the outlet side of the rolling mill be impressed, whereas in the case of the above state of the art described only interference can be adjusted in the target size.

Wenn die erfindungsgemäße Regeleinrichtung eine zweite Drehzahlregelungseinheit aufweist, die einer z.B. als S-Rolle ausgebildeten einlaufseitigen Rollenanordnung der Walzstraße zugeordnet und mittels der die Drehzahl der einlaufseitigen Rollenanordnung in Abhängigkeit von der Drehzahl der auslaufseitigen Rollenanordnung, der Sollbanddicke des Metallbands 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 which one e.g. as an S-roll trained entry-side roller arrangement of the rolling mill assigned and by means of the speed of the inlet side Roller arrangement depending on the speed of the outlet side Roll arrangement, the target strip thickness of the metal strip at the entry of the rolling mill and the deviation of the strip thickness of this nominal strip thickness can be regulated, both the outlet as well as the infeed speed, the latter depending from the measured inlet thickness of the metal strip, and thus rigidly regulates the outlet thickness via the mass flow law become. This can improve the achievable Tolerances especially in dynamic transition phases to reach.

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 in Bandlaufrichtung stromab der einlaufseitigen Rollenanordnung der Walzstraße angeordnet ist.The second speed control unit is expedient a control element associated with the second speed control unit depending on the specifiable inlet side Target strip thickness and the deviation of the strip thickness controls from this target strip thickness. This is the control element the second speed control unit advantageous a first mass flow control element connected to a strip thickness measuring device, that in the direction of belt travel downstream of the inlet side Roller arrangement of the rolling mill is arranged.

Zur Beherrschung der Materialvoreilung weist die erfindungsgemäße Regeleinrichtung vorteilhaft eine dritte Drehzahlregelungseinheit auf, die einem stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüst der Walzstraße zugeordnet ist und mittels der die Drehzahl des stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüsts in Abhängigkeit von der für die auslaufseitige Rollenanordnung vorgegebenen festen Drehzahl unter Berücksichtigung von im Bereich des stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüsts auftretenden Arbeitspunktverschiebungen regelbar ist.To master the material advance, the invention Control device advantageously a third speed control unit on the one upstream of the outlet side Roller arrangement arranged roll stand of the rolling mill is assigned and by means of which the speed of the upstream the roller assembly arranged on the outlet side depending on that for the outlet-side roller arrangement given fixed speed taking into account from in the area of the upstream of the outlet-side roller arrangement arranged work stand shifts occurring is adjustable.

Hierzu ist die dritte Drehzahlregelungseinheit der Regeleinrichtung vorteilhaft an ein zweites Massenflußregelglied angeschlossen, das an ein in Bandlaufrichtung stromauf des stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüsts angeordnetes erstes Bandzugmeßelement und an ein in Bandlaufrichtung stromab des stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüsts 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, that to an upstream in the tape running direction arranged upstream of the outlet-side roller arrangement Arranged first roll tension measuring element and on a downstream of the upstream in the strip running direction Roller arrangement arranged roller stand arranged second Bandzugmeßelement is connected.

Des weiteren sind bei einer vorteilhaften Ausführungsform der erfindungsgemäßen Regeleinrichtung dem stromauf der auslaufseitigen Rollenanordnung angeordneten Walzengerüst eine Zugregeleinheit, die an das erste Bandzugmeßelement angeschlossen und mittels der der Einlaufzug des Walzengerüsts über die Anstellung desselben durch einen ersten Regelalgorithmus kontrollierbar ist, und eine Gerüstregeleinheit zugeordnet, mittels der über einen zweiten Regelalgorithmus und einen Antrieb des Walzengerüsts als Stellglied ein über einen Walzspalt des Walzengerüsts konstanter Zugverlauf realisierbar ist.Furthermore, in an advantageous embodiment, the control device according to the invention upstream of the outlet side Roller arrangement arranged roll stand a tension control unit, which are connected to the first belt tension measuring element and by means of which the inlet train of the roll stand over the Setting the same controllable by a first control algorithm is, and assigned a scaffold control unit, by means of via a second control algorithm and a drive of the roll stand as an actuator via a roll gap constant roll course can be realized is.

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 is illustrated by an embodiment explained in more detail with reference to the drawing, in the only figure the mass flow-oriented control concept of a Control device according to the invention for single or multi-stand Rolling mills in connection with a single-stand Rolling mill is shown in principle.

Eine in der einzigen Figur der Zeichnung dargestellte Walzstraße hat eine einlaufseitige Rollenanordnung, 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 Walzengerüst 3, durch dessen Walzenspalt hindurch das Metallband einer auslaufseitigen Rollenanordnung, die ebenfalls als S-Rolle 4 ausgebildet ist, zugeführt wird.A rolling mill shown in the single figure of the drawing has an entry-side roller arrangement that, like results from the figure, is designed as an S-roll 1. In a follows the direction of tape travel indicated by an arrow 2 a roll stand 3 downstream of the inlet-side S-roll 1, through its nip, the metal strip of an outlet side Roller arrangement, also as an S-roller 4 is trained, 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 Walzengerüst an die Stelle des Walzengerüsts 3 der Walzstraße gemäß der Figur tritt.In the figure, the invention is illustrated with one arm Rolling mill shown; however, it is also a matter of course possible, a control device according to the invention with multi-stand Rolling mills to be used, in which case the outlet-side S-roll 4 upstream arranged roll stand in place of the roll stand 3 of the rolling mill according to the Figure kicks.

Die massenflußorientierte erfindungsgemäße Regeleinrichtung umfaßt zunächst eine erste Drehzahlregelungseinheit 5, welche der als S-Rolle 4 ausgebildeten auslaufseitigen Rollenanordnung 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 assigned to the outlet-side roller arrangement of the rolling mill designed as an S-roller 4. The first speed control unit 5 specifies a fixed speed for the exit-side S-roll 4, as a result of which a peripheral circumferential speed is fixed for the exit-side S-roll 4, by means of which a strip speed V1 * of the metal strip leaving the rolling mill is determined. The outlet-side S-roller 4 is accordingly a speed-controlled "Speedmaster" for the rolling mill.

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 also includes a second speed control unit 6, which is assigned to the inlet-side S-roller 1. This second speed control unit 6 controls the speed of the inlet-side S-roll 1, so that there is a speed for the circumferential roller speed of the inlet-side S-roll 1 and thus for the inlet-side belt speed of the metal strip passing through the rolling train V 0 * dyn = V 1 * x H 1 * H 0 * + Δh 0 results.

In dieser Gleichung steht

  • V0*dyn für den Sollwert der einlaufseitigen Bandgeschwindigkeit des Metallbandes,
  • V1* für den Sollwert der auslaufseitigen Bandgeschwindigkeit des Metallbandes,
  • H1* 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.
    • This equation says
  • V 0 * dyn for the setpoint of the infeed belt speed of the metal belt,
  • V 1 * for the setpoint of the outfeed belt speed of the metal belt,
  • H 1 * for the nominal value of the strip thickness of the metal strip on the outlet side,
  • H 0 * for the nominal value 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-side setpoint 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 V0* eingegeben, der in Abhängigkeit vom Sollwert 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 assigned a control element 7, which is connected via a first mass flow control element 8 to a strip thickness measuring device 9, which is arranged downstream of the inlet-side S-roll 1 in the rolling mill. Furthermore, a calculated speed value V 0 * is entered into the control element 7, which is determined as a function of the target value for the speed on the outlet-side S-roll 4, taking into account any strip thickness deviations. In the control element 7, this setpoint V 0 * is overlaid 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 controls the inlet-side S-roller 1 of the rolling mill 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 is both the discontinued and the running-in speed, the latter taking into account the one actually measured on the inlet side of the rolling mill Strip thickness of the metal strip, and thus about the mass flow law the outlet-side strip thickness of the metal strip is rigidly regulated. In this way, especially in dynamic transition phases an improvement in the achievable tolerances is expected 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 der die Drehzahl und damit die Walzenumfangsgeschwindigkeit des Walzengerüsts 3 regelbar ist.In order to advance the material used in control concepts according to Mass flow law acts as a disturbance, to be controlled, points the control device according to the invention a third speed control unit 10 on, by means of which the speed and thus the Roll peripheral speed of the roll stand 3 adjustable 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 Walzengerüsts 3 angeordnetes erstes Bandzugmeßelement 12 und an ein in Bandlaufrichtung stromab des Walzengerüsts 3 angeordnetes zweites Bandzugmeßelement angeschlossen ist.In the third speed control unit 10, the fixedly specified exit-side belt speed V 1 * is entered as the basic variable. Furthermore, the third speed control unit 10 is assigned a second mass flow control element 11, which in turn is connected to a first strip tension measuring element 12 arranged upstream of the roll stand 3 and to a second strip tension measuring element arranged downstream of the roll stand 3 in the strip running direction.

    Arbeitspunktverschiebungen des Walzengerüsts 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 Walzengerüsts 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 advance, which can lead to strip thickness errors. Such an operating point shift or the resulting material advance 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 recorded in the second mass flow control element 11 and taken into account when creating a correction variable with which in the third speed control unit 10, the predetermined tape exit speed V 1 * is superimposed. As a result, a material advance resulting from working point displacements of the roll stand 3 is kept within narrow limits, so that hardly or no strip thickness errors of the metal strip can occur.

    Der Einlaufzug des Walzengerüsts 3 wird mittels einer Zugregeleinheit 14 über die Anstellung des Walzengerüsts 3 durch einen ersten Regelalgorithmus kontrolliert. Für einen konstanten Zugverlauf über den Walzspalt des Walzengerüsts 3 sorgt mit Hilfe eines zweiten Regelalgorithmus eine Gerüstregeleinheit 15, deren Stellglied ein Antrieb des Walzengerüsts 3 ist.The inlet train of the roll stand 3 is by means of a train control unit 14 on the employment of the roll stand 3 by controls a first control algorithm. For a constant Train course over the roll gap of the roll stand 3 ensures a scaffold control unit with the help of a second control algorithm 15, the actuator of which drives the roll stand 3 is.

    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 control device according to the invention is an improvement the strip thickness during rolling by mastering the as Disturbance in control concepts acting according to the mass flow law Material lead reached. The outlet-side mass flow on the outlet-side S-roll 4 is due to the highly accurate Command values of the speed setpoints on the outlet side S-roll 4 embossed with its high dynamics. In the case of the control device according to the invention the target size or the strip thickness of the metal strip on the outlet side stamped on the rolling mill and no longer - as with the State of the art - a disturbance in the target size corrected. The individual plant components of the rolling mill are in an associated parent, on the mass flow law based control concept embedded.

    Claims (8)

    Regeleinrichtung für ein- oder mehrgerüstige Walzstraßen, mittels der die Banddicke von in der Walzstraße gefertigten Metallbändern regelbar ist, wobei die Regeleinrichtung als Massenflußregeleinrichtung ausgebildet ist.Control device for single or multi-stand rolling mills, by means of the strip thickness of those produced in the rolling mill Metal strips is adjustable, the control device as Mass flow control device is formed. Regeleinrichtung nach Anspruch 1, die eine erste Drehzahlregelungseinheit (5) aufweist, die einer z.B. als S-Rolle ausgebildeten auslaufseitigen Rollenanordnung (4) der Walzstraße zugeordnet und mittels der die auslaufseitige Rollenanordnung (4) als Speedmaster ausbild- und für die auslaufseitige Rollenanordnung (4) eine feste Drehzahl (V1 *) vorgebbar ist.Control device according to claim 1, which has a first speed control unit (5), which is assigned to an outlet-side roller arrangement (4) of the rolling mill, for example, and which forms the outlet-side roller arrangement (4) as a Speedmaster and for the outlet-side roller arrangement (4) ) a fixed speed (V 1 * ) can be specified. Regeleinrichtung nach Anspruch 1 oder 2, die eine zweite Drehzahlregelungseinheit (6) aufweist, die einer z.B. als S-Rolle ausgebildeten einlaufseitigen Rollenanordnung (1) der Walzstraße zugeordnet und mittels der die Drehzahl der einlaufseitigen Rollenanordnung (1) in Abhängigkeit von der Drehzahl der auslaufseitigen Rollenanordnung (4), der Sollbanddicke des Metallbands am Einlauf der Walzstraße und der Abweichung der Banddicke von dieser Sollbanddicke regelbar ist.Control device according to claim 1 or 2, the second Speed control unit (6), which e.g. as an S-roll trained inlet-side roller assembly (1) Assigned rolling mill and by means of the speed of the inlet side Roller arrangement (1) depending on the Speed of the outlet-side roller arrangement (4), the target strip thickness of the metal strip at the inlet of the rolling mill and the Deviation of the strip thickness from this target strip thickness can be regulated is. Regeleinrichtung nach Anspruch 3, bei der der zweiten Drehzahlregelungseinheit (6) ein Steuerelement (7) zugeordnet ist, welches die zweite Drehzahlregelungseinheit in Abhängigkeit von der vorgebbaren einlaufseitigen Sollbanddicke und der Abweichung der Banddicke von dieser Sollbanddicke steuert.Control device according to claim 3, wherein the second Speed control unit (6) assigned a control element (7) which is dependent on the second speed control unit from the predeterminable inlet strip thickness and controls the deviation of the strip thickness from this target strip thickness. Regeleinrichtung nach Anspruch 4, bei der das Steuerelement (7) der zweiten Drehzahlregelungseinheit (6) über ein erstes Massenflußregelglied (8) an ein Banddickenmeßgerät (9) angeschlossen ist, das in Bandlaufrichtung stromab der einlaufseitigen Rollenanordnung (1) der Walzstraße angeordnet ist.Control device according to claim 4, wherein the control element (7) of the second speed control unit (6) via first mass flow control element (8) to a strip thickness measuring device (9) is connected in the direction of the belt downstream of the inlet side Roller arrangement (1) of the rolling mill arranged is. Regeleinrichtung nach einem der Ansprüche 1 bis 5, die eine dritte Drehzahlregelungseinheit (10) aufweist, die einem stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüst (3) der Walzstraße zugeordnet und mittels der die Drehzahl des stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüsts (3) in Abhängigkeit von der für die auslaufseitige Rollenanordnung (4) vorgegebenen festen Drehzahl (V1*) unter Berücksichtigung von im Bereich des stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüsts (3) auftretenden Arbeitspunktverschiebungen regelbar ist.Control device according to one of claims 1 to 5, which has a third speed control unit (10) which is assigned to a roll stand (3) arranged upstream of the outlet-side roller arrangement (4) and by means of which the rotational speed of the roll stand arranged upstream of the outlet-side roller arrangement (4) (3) as a function of the fixed speed (V 1 *) predetermined for the outlet-side roller arrangement (4), taking into account working point shifts (3) which occur in the area of the roller stand (4) arranged upstream of the outlet-side roller arrangement (4). Regeleinrichtung nach Anspruch 6, bei der die dritte Drehzahlregelungseinheit (10) an ein zweites Massenflußregelglied (11) angeschlossen ist, das an ein in Bandlaufrichtung stromauf des stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüsts (3) angeordnetes erstes Bandzugmeßelement (12) und an ein in Bandlaufrichtung stromab des stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüsts (3) angeordnetes zweites Bandzugmeßelement (13) angeschlossen ist.Control device according to claim 6, wherein the third speed control unit (10) to a second mass flow control element (11) is connected to an upstream in the tape running direction the upstream of the outlet-side roller assembly (4) First roll tension measuring element arranged on the roll stand (3) (12) and to a downstream of the upstream the roller assembly (4) arranged on the outlet side (3) arranged second tape tension measuring element (13) connected. Regeleinrichtung nach Anspruch 7, bei der dem stromauf der auslaufseitigen Rollenanordnung (4) angeordneten Walzengerüst (3) eine Zugregeleinheit (14), die an das erste Bandzugmeßelement (12) angeschlossen und mittels der der Einlaufzug des Walzengerüsts (3) über die Anstellung desselben durch einen ersten Regelalgorithmus kontrollierbar ist, und eine Gerüstregeleinheit (15) zugeordnet sind, mittels der über einen zweiten Regelalgorithmus und einen Antrieb des Walzengerüsts (3) als Stellglied ein über einen Walzspalt des Walzengerüsts (3) konstanter Zugverlauf realisierbar ist.Control device according to claim 7, wherein the upstream of the outlet-side roller arrangement (4) arranged roll stand (3) a tension control unit (14) attached to the first band tension measuring element (12) connected and by means of which the inlet train of the Roll stand (3) on the employment of the same by a first control algorithm is controllable, and a scaffold control unit (15) are assigned by means of a second control algorithm and a drive of the roll stand (3) as an actuator via a roll gap of the roll stand (3) constant course of the train can be realized.
    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
    DE19962183A DE19962183A1 (en) 1999-12-22 1999-12-22 Control device for single or multi-stand rolling mills
    DE19962183 1999-12-22

    Publications (3)

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

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    EP00126993A Expired - Lifetime EP1110634B1 (en) 1999-12-22 2000-12-08 Control device for single or multiple stand rolling mills

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

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2129629A1 (en) * 1970-06-15 1971-12-23 Allegheny Ludlum Ind Inc Control system
    EP0063633A1 (en) * 1981-04-29 1982-11-03 Kawasaki Steel Corporation 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

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2129629A1 (en) * 1970-06-15 1971-12-23 Allegheny Ludlum Ind Inc Control system
    EP0063633A1 (en) * 1981-04-29 1982-11-03 Kawasaki Steel Corporation 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

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    PATENT ABSTRACTS OF JAPAN vol. 011, no. 014 (M-553), 14. Januar 1987 (1987-01-14) & JP 61 189811 A (SUMITOMO METAL IND LTD), 23. August 1986 (1986-08-23) *

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    DE19962183A1 (en) 2001-07-12
    EP1110634B1 (en) 2005-02-16
    ATE289228T1 (en) 2005-03-15
    DE50009545D1 (en) 2005-03-24
    ES2235752T3 (en) 2005-07-16
    EP1110634A3 (en) 2003-03-12

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