EP0998990B1 - Method and device for controlling the width of a metal strip - Google Patents

Method and device for controlling the width of a metal strip Download PDF

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Publication number
EP0998990B1
EP0998990B1 EP99120828A EP99120828A EP0998990B1 EP 0998990 B1 EP0998990 B1 EP 0998990B1 EP 99120828 A EP99120828 A EP 99120828A EP 99120828 A EP99120828 A EP 99120828A EP 0998990 B1 EP0998990 B1 EP 0998990B1
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EP
European Patent Office
Prior art keywords
width
metal strip
rolling
tension
stand
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EP99120828A
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German (de)
French (fr)
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EP0998990A3 (en
EP0998990A2 (en
Inventor
Matthias Dr. Müller
Siegbert Dipl.-Ing. Steidl
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Siemens AG
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Siemens AG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16Control of thickness, width, diameter or other transverse dimensions
    • B21B37/22Lateral spread control; Width control, e.g. by edge rolling

Definitions

  • the invention relates to a method and a device for regulating the width of a metal strip in a rolling mill with at least one roll stand.
  • EP 0 375 095 B1 describes a generic method and a generic device for continuous Regulating the strip width when finishing hot strip a multi-stand rolling mill known, the range at least behind the finishing line and the tape thickness behind the last scaffold and changes in thickness over one Thickness control loop on the last stand can be adjusted. there the bandwidth will be continuous immediately after the last one Stitch and measured before the penultimate stitch. The measured values are fed to a width controller with feedforward control the width of the metal strip by influencing the roll gap on the last scaffold.
  • the disadvantage of this procedure is that by interfering with the setting of the last The tape thickness is also changed if it is not is kept constant by complex compensation.
  • JP (A) 62289307 suggests the excess width of one material to be rolled by means of a loop lifter and a Minimize width measurement.
  • JP (A) 57139415 describes a method for a thickness deviation to minimize, in particular the output side Width of a material at the end of a rolling mill with a predetermined product width is compared.
  • JP (A) 54123556 describes a method for width control a rolled material, with the motors cascaded arranged roll stands taking into account each one only measured according to the affected roll stands Width deviation can be regulated.
  • the device for regulating the width of a metal strip is the Width of the metal strip measured in front of a first roll stand.
  • the train in the Metal tape using a width regulator in front of the first Roll stand downstream second roll stand depending the width of the metal strip measured in front of the first roll stand set, with the width of the metal band behind measured the second mill stand and the width controller depending the one measured behind the second roll stand Width of the metal strip, a target value for the width of the Metal strip and depending on the rolling parameters to the Properties of the rolling mill adapted.
  • the adaptation is advantageously carried out online.
  • the first and the second mill stand the last two mill stands a multi-stand rolling mill.
  • the tension in the metal band is adjusted by means of a loop lifter.
  • the tension in the metal strip is adjusted by means of a minimum tension control.
  • the train in the metal strip by specifying an additional setpoint set for a train regulation.
  • reference numeral 4 designates a metal band which in is rolled on a rolling mill.
  • the rolling mill has rolling stands on, indicated in FIG 1 by the rollers 5, 6, 7 and 8 are.
  • the indices i denote the number of the Rolling stand. This is the rolling stand with rollers 5 and 6 the i-1-th and the roll stand with the rollers 7 and 8 the i-th Rolling stand.
  • the mill stands are driven by motors 9 and 10, which their target speeds n * / i-1 or n * / i of one higher-level speed setpoint generator 13 received.
  • a loop lifter 12 arranged by means of which the train in the metal strip 4 between the i-1th and the i-th roll stand is set.
  • Input variable in the speed setpoint generator 13 is i.a. the Loop lifter angle ⁇ .
  • the loop lifter is by means of a Loop controller 2 regulated.
  • Behind the i-th mill stand a width measuring device 11 is arranged, which has a measured value w for the width of the metal strip 4 provides. This measured value w the Width of the metal strip 4 is determined by means of a summation point 17 deducted from a desired value w * of the width of the metal strip.
  • This difference is the input variable for a width controller 1, which supplies an additional set tension value ⁇ T *. through A summation point 18 becomes this additional tape tension setpoint ⁇ T * added to a strip tension setpoint T *. The Sum forms the setpoint for belt tension controller 2.
  • FIG. 1 shows the exemplary use of the invention in connection with an adjustment of the strip tension by means of a loop lifter 12
  • FIG. 2 shows the exemplary use of the invention for a rolling train with minimal tension control.
  • Reference numerals 4 to 11, 17, i-1, i, w, and w * have the same meaning as in FIG. 1.
  • a width controller 19 is provided which has an additional strip tension setpoint ⁇ T * i-1, i in Dependence of the difference between the desired value w * of the width of the metal strip 4 and the measured value w of the width of the metal strip 4 is determined.
  • a strip tension measuring device 15 which delivers a measured value T i-1, i of the strip tension between the i-1-th and the i-th roll stand. This measured value T i-1, i is fed to a speed setpoint generator 14.
  • Input variables in the speed setpoint generator 14 include the measured value T i-1, i and the additional strip tension setpoint ⁇ T * / i-1, i.
  • the speed setpoint generator 14 determines the setpoints n * i-1 and n * i for the speeds of the i-1-th and i-th roll stand in such a way that a train corresponding to the sum T * / i-1, i + ⁇ T * / i-1, i.
  • FIG. 3 shows the interaction of a width controller 26 with a monitor controller 27 3 shows a loop lifter 12, but the monitor controller can 27 also in connection with a minimum draft control - As described in FIG 2 - are used.
  • Reference numerals 4 to 8, 11, 12, 18, i-1, i, w, w *, T * and ⁇ T * correspond to the corresponding reference symbols in FIG. 1.
  • the monitor controller 27 has an exemplary embodiment a PT1 element 20 and a dead time element 21. Input of the monitor controller is the additional tape tension setpoint that is determined by the Width controller 26 is determined. The output of the monitor controller 27 becomes a measured value w by means of a summation point 22 added to the width of the metal strip 7.
  • FIG. 4 shows an alternative embodiment, wherein a Width controller 35 is adapted.
  • 4 shows three roll stands: an i-2-th roll stand, indicated by the rolls 40 and 41, an i-1th mill stand, indicated by the rolls 42 and 43, as well as an i-th roll stand, indicated by the Rolls 44 and 45.
  • a metal strip is made by means of these roll stands 4 rolled.
  • Loop lifters are used to adjust the tape tension 12 and 33 are provided.
  • the embodiment shown is also in connection with a minimum draft control can be used accordingly as in FIG. 2.
  • Reference numerals 2, 4, 11, 12, 17, 18, w *, T * and ⁇ T * in FIG. 4 correspond to the corresponding reference numerals in FIG. 1.
  • w i in FIG. 4 corresponds to w in FIG. 1.
  • another width measuring device 30 provided in front of the i-1-th roll stand.
  • the width measuring device 30 supplies a measured value w i-2 of the width of the metal strip 4 in front of the i-1-th roll stand.
  • the measured value w i-2 is subtracted from a desired value w * for the width of the metal strip 4 by means of a summation point 34.
  • the difference is the input variable in a width controller 35, which determines an additional strip tension setpoint .DELTA.T * for the tension in the metal strip 4 between the i-1-th and the i-th roll stand.
  • the width controller 35 is adapted by means of an adapter 36 as a function of rolling parameters x 1 to x n and the difference between the values w * and w i .
  • the adaptation takes place in such a way that the difference between w * and w i is as small as possible or zero.
  • the adaptation is advantageously carried out by means of a neural Network or by means of a method for parameter identification.
  • the invention is illustrated in the exemplary embodiments according to FIG. 1 to 4 anywhere in a multi-stand Rolling mill used. It can also be provided to be used at several points in a multi-stand rolling mill. However, the rolling mill is particularly advantageous End of a, especially multi-stand, rolling mill.
  • the i-th roll stand designates the last roll stand the rolling mill and the i-1-th mill stand the penultimate Roll stand of the rolling mill.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

Process for regulating the width (w) of a metal strip (4) in a mill train with at least one roll stand comprises measuring the width of the metal strip behind the roll stand. To adjust the width of the metal strip, the tension in the metal strip is adjusted before the roll stand depending on the width of the strip measured behind the roll stand. An Independent claim is also included for an apparatus for regulating the width (w) of a metal strip (4) in a mill train.

Description

Die Erfindung betrifft gemäß den Oberbegriffen der Ansprüche 1 bzw. 7 ein Verfahren bzw. eine Einrichtung zum Regeln der Breite eines Metallbandes in einer Walzstraße mit zumindest einem Walzgerüst.According to the preambles of claims 1 and 7, the invention relates to a method and a device for regulating the width of a metal strip in a rolling mill with at least one roll stand.

Aus der EP 0 375 095 B1 ist ein gattungsgemäßes Verfahren sowie eine gattungsgemäße Vorrichtung zum kontinuierlichen Regeln der Bandbreite beim Fertigwalzen von Warmband auf einer mehrgerüstigen Walzstraße bekannt, wobei die Bandbreite zumindest hinter der Fertigstaffel und die Banddicke hinter dem letzten Gerüst gemessen und Dickenänderungen über einen Dickenregelkreis am letzten Gerüst ausgeregelt werden. Dabei wird die Bandbreite kontinuierlich unmittelbar nach dem letzten Stich und vor dem vorletzten Stich gemessen. Die Meßwerte werden einem Breitenregler mit Vorsteuerung zugeführt, der die Breite des Metallbandes durch Beeinflussung des Walzspaltes am letzten Gerüst regelt. Der Nachteil dieses Verfahrens ist, daß durch den Eingriff auf die Einstellung des letzten Gerüsts auch die Banddicke verändert wird, wenn sie nicht durch aufwendige Kompensation konstant gehalten wird.EP 0 375 095 B1 describes a generic method and a generic device for continuous Regulating the strip width when finishing hot strip a multi-stand rolling mill known, the range at least behind the finishing line and the tape thickness behind the last scaffold and changes in thickness over one Thickness control loop on the last stand can be adjusted. there the bandwidth will be continuous immediately after the last one Stitch and measured before the penultimate stitch. The measured values are fed to a width controller with feedforward control the width of the metal strip by influencing the roll gap on the last scaffold. The disadvantage of this procedure is that by interfering with the setting of the last The tape thickness is also changed if it is not is kept constant by complex compensation.

Die JP (A) 62289307 schlägt vor, die Überschussbreite eines zu walzenden Materials mittels eines Schlingenhebers und einer Breitenmessung zu minimieren.JP (A) 62289307 suggests the excess width of one material to be rolled by means of a loop lifter and a Minimize width measurement.

Die JP (A) 57139415 beschreibt ein Verfahren um eine Dickenabweichung zu minimieren, wobei insbesondere die ausgangsseitige Breite eines Materials am Ende einer Walzstraße mit einer vorgegebenen Produktbreite verglichen wird.JP (A) 57139415 describes a method for a thickness deviation to minimize, in particular the output side Width of a material at the end of a rolling mill with a predetermined product width is compared.

Die JP (A) 54123556 beschreibt ein Verfahren zur Breitenregelung eines gewalzten Materials, wobei die Motoren kaskadiert angeordneter Walzgerüste jeweils unter Berücksichtigung einer ausschließlich nach den betroffenen Walzgerüsten gemessenen Breitenabweichung geregelt werden.JP (A) 54123556 describes a method for width control a rolled material, with the motors cascaded arranged roll stands taking into account each one only measured according to the affected roll stands Width deviation can be regulated.

Entsprechend ist es Aufgabe der Erfindung, ein Verfahren bzw. eine Einrichtung anzugeben, mittels der die Bandbreite ohne unzulässig hohe Rückwirkungen auf die Bandbreite geregelt wird. Dabei soll das Verfahren möglichst einfach und robust sein. Diese Aufgabe wird erfindungsgemäß durch ein Verfahren gemäß Anspruch 1 bzw. eine Walzstraße gemäß Anspruch 8 gelöst.Accordingly, it is an object of the invention to provide a method or to specify a facility by means of which the bandwidth without impermissibly high repercussions on the bandwidth regulated becomes. The process should be as simple and robust as possible his. According to the invention, this object is achieved by a method solved according to claim 1 or a rolling mill according to claim 8.

Gemäß dem erfindungsgemäßen Verfahren bzw. der erfindungsgemäßen Walzstraße mit mindestens zwei Walzgerüsten und einer Einrichtung zum Regeln der Breite eines Metallbandes wird die Breite des Metallbandes vor einem ersten Walzgerüst gemessen. Zur Einstellung der Breites des Metallbandes wird der Zug im Metallband mittels eines Breitenreglers vor einem dem ersten Walzgerüst nachgeordneten zweiten Walzgerüst in Abhängigkeit der vor dem ersten Walzgerüst gemessenen Breite des Metallbandes eingestellt, wobei die Breite des Metallbandes hinter dem zweiten Walzgerüst gemessen und der Breitenregler in Abhängigkeit der hinter dem zweiten Walzgerüst gemessenen Breite des Metallbandes, eines Sollwertes für die Breite des Metallbandes und in Abhängigkeit von Walzparametern an die Eigenschaften der Walzstraße adaptiert.According to the inventive method or the inventive Rolling mill with at least two rolling stands and one The device for regulating the width of a metal strip is the Width of the metal strip measured in front of a first roll stand. To adjust the width of the metal strip, the train in the Metal tape using a width regulator in front of the first Roll stand downstream second roll stand depending the width of the metal strip measured in front of the first roll stand set, with the width of the metal band behind measured the second mill stand and the width controller depending the one measured behind the second roll stand Width of the metal strip, a target value for the width of the Metal strip and depending on the rolling parameters to the Properties of the rolling mill adapted.

Auf diese Weise ist es möglich, die Breite des Metallbandes deutlich besser einem gewünschten Sollwert anzunähern, so daß für eine Walzstraße erhebliche Tonnen Stahl pro Jahr eingespart werden, weil ein Randverschnitt durch Besäumscheren entfällt.In this way it is possible to change the width of the metal strip to approach a desired setpoint much better, so that considerable tons of steel saved per year for a rolling mill be cut because of trimming scissors eliminated.

Mit Vorteil erfolgt die Adaption online. The adaptation is advantageously carried out online.

In weiterhin vorteilhafter Ausgestaltung der Erfindung sind das erste und das zweite Walzgerüst die letzten beiden Walzgerüste einer mehrgerüstigen Walzstraße.In a further advantageous embodiment of the invention the first and the second mill stand the last two mill stands a multi-stand rolling mill.

In weiterhin vorteilhafter Ausgestaltung der Erfindung wird der Zug im Metallband mittels eines Schlingenhebers eingestellt.In a further advantageous embodiment of the invention the tension in the metal band is adjusted by means of a loop lifter.

In weiterhin vorteilhafter Ausgestaltung der Erfindung wird der Zug im Metallband mittels einer Minimalzugregelung eingestellt.In a further advantageous embodiment of the invention the tension in the metal strip is adjusted by means of a minimum tension control.

In weiterhin vorteilhafter Ausgestaltung der Erfindung wird der Zug im Metallband durch Vorgabe eines Zusatzsollwertes für eine Zugregelung eingestellt.In a further advantageous embodiment of the invention the train in the metal strip by specifying an additional setpoint set for a train regulation.

Weitere Vorteile und Einzelheiten ergeben sich aus nachfolgender Beschreibung von Ausführungsbeispielen der Erfindung. Im einzelnen zeigen:

FIG 1
eine Zugregelung mittels Schlingenregler
FIG 2
eine Minimalzugregelung
FIG 3
einen Breitenregler mit Monitorregler
FIG 4
einen Breitenregler mit Adaption.
Further advantages and details emerge from the following description of exemplary embodiments of the invention. In detail show:
FIG. 1
a tension control by means of a loop regulator
FIG 2
a minimum draft regulation
FIG 3
a width controller with monitor controller
FIG 4
a width controller with adaptation.

In FIG 1 bezeichnet Bezugszeichen 4 ein Metallband, das in einer Walzstraße gewalzt wird. Die Walzstraße weist Walzgerüste auf, die in FIG 1 durch die Walzen 5, 6, 7 und 8 angedeutet sind. In FIG 1 bezeichnen die Indices i die Nummer der Walzgerüstes. So ist das Walzgerüst mit den Walzen 5 und 6 das i-1-te und das Walzgerüst mit den Walzen 7 und 8 das i-te Walzgerüst. Die Walzgerüste werden durch Motoren 9 und 10 angetrieben, die ihre Solldrehzahlen n * / i-1 bzw. n * / i von einem übergeordneten Drehzahl-Sollwertgeber 13 erhalten. Zwischen dem i-1-ten und dem i-ten Walzgerüst ist ein Schlingenheber 12 angeordnet, mittels dessen der Zug im Metallband 4 zwischen dem i-1ten und dem i-ten Walzgerüst eingestellt wird. Eingangsgröße in den Drehzahl-Sollwertgeber 13 ist u.a. der Schlingenheberwinkel α. Der Schlingenheber wird mittels eines Schlingenreglers 2 geregelt. Hinter dem i-ten Walzgerüst ist ein Breitenmeßgerät 11 angeordnet, das einen Meßwert w für die Breite des Metallbandes 4 liefert. Dieser Meßwert w der Breite des Metallbandes 4 wird mittels eines Summationspunktes 17 von einem Sollwert w* der Breite des Metallbandes abgezogen. Diese Differenz ist Eingangsgröße für einen Breitenregler 1, der einen Bandzug-Zusatzsollwert ΔT* liefert. Mittels eines Summationspunktes 18 wird dieser Bandzug-Zusatzsollwert ΔT* zu einem Bandzug-Sollwert T* hinzuaddiert. Die Summe bildet den Sollwert für den Bandzugregler 2.In FIG. 1, reference numeral 4 designates a metal band which in is rolled on a rolling mill. The rolling mill has rolling stands on, indicated in FIG 1 by the rollers 5, 6, 7 and 8 are. In FIG 1, the indices i denote the number of the Rolling stand. This is the rolling stand with rollers 5 and 6 the i-1-th and the roll stand with the rollers 7 and 8 the i-th Rolling stand. The mill stands are driven by motors 9 and 10, which their target speeds n * / i-1 or n * / i of one higher-level speed setpoint generator 13 received. Between the i-1-th and the i-th roll stand is a loop lifter 12 arranged by means of which the train in the metal strip 4 between the i-1th and the i-th roll stand is set. Input variable in the speed setpoint generator 13 is i.a. the Loop lifter angle α. The loop lifter is by means of a Loop controller 2 regulated. Behind the i-th mill stand a width measuring device 11 is arranged, which has a measured value w for the width of the metal strip 4 provides. This measured value w the Width of the metal strip 4 is determined by means of a summation point 17 deducted from a desired value w * of the width of the metal strip. This difference is the input variable for a width controller 1, which supplies an additional set tension value ΔT *. through A summation point 18 becomes this additional tape tension setpoint ΔT * added to a strip tension setpoint T *. The Sum forms the setpoint for belt tension controller 2.

Während FIG 1 den beispielhaften Einsatz der Erfindung im Zusammenhang mit einer Einstellung des Bandzugs mittels eines Schlingenhebers 12 zeigt, zeigt FIG 2 den beispielhaften Einsatz der Erfindung für eine Walzstraße mit Minimalzugregelung. Dabei haben Bezugszeichen 4 bis 11, 17, i-1, i, w, und w* die gleiche Bedeutung wie in FIG 1. Im vorliegenden Ausführungsbeispiel ist ein Breitenregler 19 vorgesehen, der einen Bandzug-Zusatzsollwert ΔT*i-1,i in Abhängigkeit der Differenz zwischen dem Sollwert w* der Breite des Metallbandes 4 und dem Meßwert w der Breite des Metallbandes 4 ermittelt. Ferner ist ein Bandzugmeßgerät 15 vorgesehen, das einen Meßwert Ti-1,i des Bandzuges zwischen dem i-1-ten und dem i-ten Walzgerüst liefert. Dieser Meßwert Ti-1,i wird einem Drehzahl-Sollwertgeber 14 zugeführt.1 shows the exemplary use of the invention in connection with an adjustment of the strip tension by means of a loop lifter 12, FIG. 2 shows the exemplary use of the invention for a rolling train with minimal tension control. Reference numerals 4 to 11, 17, i-1, i, w, and w * have the same meaning as in FIG. 1. In the present exemplary embodiment, a width controller 19 is provided which has an additional strip tension setpoint ΔT * i-1, i in Dependence of the difference between the desired value w * of the width of the metal strip 4 and the measured value w of the width of the metal strip 4 is determined. Furthermore, a strip tension measuring device 15 is provided, which delivers a measured value T i-1, i of the strip tension between the i-1-th and the i-th roll stand. This measured value T i-1, i is fed to a speed setpoint generator 14.

Eingangsgrößen in den Drehzahl-Sollwertgeber 14 sind u.a. der Meßwert Ti-1,i sowie der Bandzug-Zusatzsollwert ΔT * / i-1,i.Input variables in the speed setpoint generator 14 include the measured value T i-1, i and the additional strip tension setpoint ΔT * / i-1, i.

Der Drehzahl-Sollwertgeber 14 ermittelt die Sollwerte n*i-1 und n*i für die Drehzahlen des i-1-ten und i-ten Walzgerüstes derart, daß sich zwischen ihnen ein Zug entsprechend der Summe T * / i-1,i + ΔT * / i-1,i einstellt.The speed setpoint generator 14 determines the setpoints n * i-1 and n * i for the speeds of the i-1-th and i-th roll stand in such a way that a train corresponding to the sum T * / i-1, i + ΔT * / i-1, i.

FIG 3 zeigt das Zusammenwirken eines Breitenreglers 26 mit einem Monitorregler 27. Zwar ist im Ausführungsbeispiel gemäß FIG 3 ein Schlingenheber 12 vorgesehen, jedoch kann der Monitorregler 27 entsprechend auch im Zusammenhang mit einer Minimalzugregelung - wie in FIG 2 beschrieben - eingesetzt werden. Bezugszeichen 4 bis 8, 11, 12, 18, i-1, i, w, w*, T* und ΔT* entsprechen den entsprechenden Bezugszeichen in FIG 1. Der Monitorregler 27 weist in beispielhafter Ausgestaltung ein PT1-Glied 20 und ein Totzeitglied 21 auf. Eingang des Monitorreglers ist der Bandzug-Zusatzsollwert, der von dem Breitenregler 26 ermittelt wird. Der Ausgang des Monitorreglers 27 wird mittels eines Summationspunktes 22 zum Meßwert w der Breite des Metallbandes 7 hinzuaddiert. Diese Summe wird in vorteilhafter Weise mittels eines Istwertfilters 25 gefiltert. Der Ausgang des Istwertfilters 25 wird mittels eines Summationspunktes 24 vom Sollwert w* der Breite des Metallbandes 4 subtrahiert. Diese Differenz ist Eingang des Breitenreglers 26.3 shows the interaction of a width controller 26 with a monitor controller 27 3 shows a loop lifter 12, but the monitor controller can 27 also in connection with a minimum draft control - As described in FIG 2 - are used. Reference numerals 4 to 8, 11, 12, 18, i-1, i, w, w *, T * and ΔT * correspond to the corresponding reference symbols in FIG. 1. The monitor controller 27 has an exemplary embodiment a PT1 element 20 and a dead time element 21. Input of the monitor controller is the additional tape tension setpoint that is determined by the Width controller 26 is determined. The output of the monitor controller 27 becomes a measured value w by means of a summation point 22 added to the width of the metal strip 7. This sum will filtered in an advantageous manner by means of an actual value filter 25. The output of the actual value filter 25 is by means of a Summation point 24 from the target value w * the width of the metal strip 4 subtracted. This difference is the input of the width controller 26th

FIG 4 zeigt ein alternatives Ausführungsbeispiel, wobei ein Breitenregler 35 adaptiert wird. FIG 4 zeigt drei Walzgerüste: ein i-2-tes Walzgerüst, angedeutet durch die Walzen 40 und 41, ein i-1-tes Walzgerüst, angedeutet durch die Walzen 42 und 43, sowie ein i-tes Walzgerüst, angedeutet durch die Walzen 44 und 45. Mittels dieser Walzgerüste wird ein Metallband 4 gewalzt. Zur Einstellung des Bandzugs sind Schlingenheber 12 und 33 vorgesehen. Jedoch ist das gezeigte Ausführungsbeispiel auch im Zusammenhang mit einer Minimalzugregelung wie in FIG 2 entsprechend einsetzbar.4 shows an alternative embodiment, wherein a Width controller 35 is adapted. 4 shows three roll stands: an i-2-th roll stand, indicated by the rolls 40 and 41, an i-1th mill stand, indicated by the rolls 42 and 43, as well as an i-th roll stand, indicated by the Rolls 44 and 45. A metal strip is made by means of these roll stands 4 rolled. Loop lifters are used to adjust the tape tension 12 and 33 are provided. However, the embodiment shown is also in connection with a minimum draft control can be used accordingly as in FIG. 2.

Bezugszeichen 2, 4, 11, 12, 17, 18, w*, T* und ΔT* in FIG 4 entsprechen den entsprechenden Bezugszeichen in FIG 1. wi in FIG 4 entspricht w in FIG 1. Gemäß FIG 4 ist ein weiteres Breitenmeßgerät 30 vor dem i-1-ten Walzgerüst vorgesehen. Das Breitenmeßgerät 30 liefert einen Meßwert wi-2 der Breite des Metallbandes 4 vor dem i-1-ten Walzgerüst. Der Meßwert wi-2 wird mittels eines Summationspunktes 34 von einem Sollwert w* für die Breite des Metallbandes 4 subtrahiert. Die Differenz ist Eingangsgröße in einem Breitenregler 35, der einen Bandzug-Zusatzsollwert ΔT* für den Zug im Metallband 4 zwischen dem i-1-ten und dem i-ten Walzgerüst ermittelt. Der Breitenregler 35 wird mittels eines Adaptierers 36 in Abhängigkeit von Walzparametern x1 bis xn sowie der Differenz der Werte w* und wi adaptiert. Die Adaption erfolgt derart, daß die Differenz zwischen w* und wi möglichst klein bzw. Null ist.Reference numerals 2, 4, 11, 12, 17, 18, w *, T * and ΔT * in FIG. 4 correspond to the corresponding reference numerals in FIG. 1. w i in FIG. 4 corresponds to w in FIG. 1. According to FIG. 4, another width measuring device 30 provided in front of the i-1-th roll stand. The width measuring device 30 supplies a measured value w i-2 of the width of the metal strip 4 in front of the i-1-th roll stand. The measured value w i-2 is subtracted from a desired value w * for the width of the metal strip 4 by means of a summation point 34. The difference is the input variable in a width controller 35, which determines an additional strip tension setpoint .DELTA.T * for the tension in the metal strip 4 between the i-1-th and the i-th roll stand. The width controller 35 is adapted by means of an adapter 36 as a function of rolling parameters x 1 to x n and the difference between the values w * and w i . The adaptation takes place in such a way that the difference between w * and w i is as small as possible or zero.

Die Adaption erfolgt vorteilhafterweise mittels eines neuronalen Netzes oder mittels eines Verfahrens zur Parameteridentifikation.The adaptation is advantageously carried out by means of a neural Network or by means of a method for parameter identification.

Die Erfindung wird in den Ausführungsbeispielen gemäß FIG 1 bis 4 an einer beliebigen Stelle in einer mehrgerüstigen Walzstraße eingesetzt. Es kann ferner vorgesehen werden, sie an mehreren Stellen in einer mehrgerüstigen Walzstraße einzusetzen. Besonders vorteilhaft kommt die Walzstraße jedoch am Ende einer, insbesondere mehrgerüstigen, Walzstraße zum Einsatz. Dabei bezeichnet das i-te Walzgerüst das letzte Walzgerüst der Walzstraße und das i-1-te Walzgerüst das vorletzte Walzgerüst der Walzstraße.The invention is illustrated in the exemplary embodiments according to FIG. 1 to 4 anywhere in a multi-stand Rolling mill used. It can also be provided to be used at several points in a multi-stand rolling mill. However, the rolling mill is particularly advantageous End of a, especially multi-stand, rolling mill. The i-th roll stand designates the last roll stand the rolling mill and the i-1-th mill stand the penultimate Roll stand of the rolling mill.

Claims (7)

  1. Method for controlling the width (w) of a metal strip (4) in a rolling mill train with at least two rolling stands, the width (w) of the metal strip (4) upstream of a first rolling stand being measured, the tension in the metal strip (4) being set by means of a width controller upstream of a second rolling stand, arranged downstream of the first rolling stand, as a function of the width (w) of the metal strip (4) measured upstream of the first rolling stand, in order to set the width (w) of the metal strip (4), and the width (w) of the metal strip (4) being measured downstream of the second rolling stand, characterized in that the width controller is adapted to the properties of the rolling mill train as a function of the width (w) of the metal strip (4) measured downstream of the second rolling stand, of a desired value (w*) for the width of the metal strip (4) and as a function of rolling parameters (x1 - xn).
  2. Method according to Claim 1, characterized in that the adaptation is carried out on-line.
  3. Method according to one of the preceding claims, characterized in that the first and second rolling stands are the last two rolling stands of a multi-stand rolling mill train.
  4. Method according to one of the preceding claims, characterized in that the tension in the metal strip (4) is set by means of a loop lifter.
  5. Method according to either of Claims 1 or 2, characterized in that the tension in the metal strip (4) is set by means of a minimum tension control.
  6. Method according to Claim 5, characterized in that the tension in the metal strip (4) is set by stipulating an additional strip tension desired value (ΔT*, ΔT*i-1,i) for a tension control.
  7. Rolling mill train having at least two rolling stands and a device for controlling the width (w) of a metal strip (4) for carrying out the method according to one of Claims 1 to 6, the device for controlling the width (w) of the metal strip (4) having a width-measuring device for measuring the width (w) of the metal strip (4) upstream of a first rolling stand, and the device for controlling the width (w) of the metal strip (4) having a width controller for setting the tension in the metal strip (4) upstream of a second rolling stand, arranged downstream of the first rolling stand; as a function of the width (w) of the metal strip (4) measured upstream of the first rolling stand, the device for controlling the width (w) having a width-measuring device for measuring the width (w) of the metal strip (4) downstream of the second rolling stand; characterized in that the device for controlling the width (w) of the metal strip (4) has an adaptor for adapting the width controller to the properties of the rolling mill train as a function of the width (w) of the metal strip (4) measured downstream of the second rolling stand, of a desired value (w*) for the width of the metal strip (4) and as a function of rolling parameters (x1-xn).
EP99120828A 1998-11-05 1999-10-25 Method and device for controlling the width of a metal strip Expired - Lifetime EP0998990B1 (en)

Applications Claiming Priority (2)

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DE19851053A DE19851053A1 (en) 1998-11-05 1998-11-05 Method and device for regulating the width of a metal strip
DE19851053 1998-11-05

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EP0998990A2 EP0998990A2 (en) 2000-05-10
EP0998990A3 EP0998990A3 (en) 2002-12-18
EP0998990B1 true EP0998990B1 (en) 2004-10-06

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JPWO2007132726A1 (en) * 2006-05-12 2009-09-24 東レエンジニアリング株式会社 Color filter manufacturing method and apparatus
EP2998040A1 (en) 2014-09-17 2016-03-23 Primetals Technologies Germany GmbH Width adjustment in a finishing train

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2249366A1 (en) * 1971-10-11 1973-04-19 Hitachi Ltd METHOD AND DEVICE FOR MONITORING AND CONTROLLING THE WIDTH OF A ROLLED STRIP
JPS54123556A (en) * 1978-03-20 1979-09-25 Toshiba Corp Controller for rolling mill
JPS57139415A (en) * 1981-02-20 1982-08-28 Sumitomo Metal Ind Ltd Controlling method for sheet breadth of continuous hot rolling mill
JPS62289307A (en) * 1986-06-06 1987-12-16 Kawasaki Steel Corp Sheet width controlling method in rolling mill

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DE59910729D1 (en) 2004-11-11
ATE278485T1 (en) 2004-10-15
DE19851053A1 (en) 2000-05-18
EP0998990A3 (en) 2002-12-18
EP0998990A2 (en) 2000-05-10

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