EP1320425B1 - Method and device for operating a hot rolling train with at least one edger - Google Patents

Method and device for operating a hot rolling train with at least one edger Download PDF

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Publication number
EP1320425B1
EP1320425B1 EP01980167A EP01980167A EP1320425B1 EP 1320425 B1 EP1320425 B1 EP 1320425B1 EP 01980167 A EP01980167 A EP 01980167A EP 01980167 A EP01980167 A EP 01980167A EP 1320425 B1 EP1320425 B1 EP 1320425B1
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EP
European Patent Office
Prior art keywords
strip
edger
sensor
rolled strip
infrared
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EP01980167A
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German (de)
French (fr)
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EP1320425A1 (en
Inventor
Konrad Thiele
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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
    • B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
    • 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
    • B21B37/72—Rear end control; Front end control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/12—End of product

Definitions

  • the invention relates to a method for operating a hot rolling mill with at least one edger stand and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip is achieved with a computing system.
  • the invention further relates to an apparatus for operating a hot rolling mill with at least one edger stand and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip can be achieved with a computing system.
  • Strip steel is achieving a rectangular base shape with a constant width over the length of the strip.
  • vertical rolling stands which are also referred to as upsetting frames, serve to control the bandwidth.
  • the edging stands are equipped with fast hydraulic setting systems.
  • the rolled strip usually becomes narrower at the strip ends, ie the strip head and the strip base, than in the middle part due to the asymmetrical material flow and other effects.
  • width constrictions at the strip ends starting from the rectangular rolled strip form obtained after a compression process, ie during the passage of the rolled strip through the edger.
  • the widths or width constrictions occurring at the strip ends are primarily due to the asymmetric pressure and shear stresses in the region of the strip ends initiated by the upsetting stacks, which lead to an increased longitudinal material flow in the strip edge region due to the lack of material support.
  • an increase in the change in the shape of the height changes as the shape change changes, leading to beading along the strip edges. This bulge along the band edges is also referred to as a so-called dog bone form.
  • the Anstellposition the edger shoring during the band pass is adjustable, the employment of the edger stand when passing through the rolled strip ends in the form of short rashes, so-called "short strokes", relative to the middle part, further ascended.
  • This adjustment correction at the strip ends of the rolled strip i. on the tape head and on the belt foot, takes place in accordance with a travel curve, which can be defined by predetermined travel curve parameters.
  • a device for detecting the shapes of rolling stock ends which contains a first strip camera, with which the rolling stock surface is detected during the movement.
  • the receiving elements of the first camera are arranged transversely to the direction of movement of the rolling stock.
  • the camera is synchronized by a signal proportional to the rolling stock speed and entered into an image memory, with which an evaluation device is connected, which defines a cutting line for a particular Schopfform.
  • the object of the invention is to find a method for operating a hot rolling mill with at least one edger and at least one sensor for determining the belt end position, with a more reliable determination of the belt end position of the rolled strip is achieved.
  • the invention is further based on the object of finding an apparatus for operating a hot rolling mill with at least one edger stand and with at least one sensor for determining the belt end position, which enables a more reliable determination of the belt end position of the rolled strip.
  • the object is achieved by a method according to claim 1.
  • the object is further achieved by a device according to claim 7.
  • Advantageous developments of the method and the device are specified in the further claims.
  • the inventive method according to claim 1 comprises a line for detecting the tape end position detection of the infrared radiation of the rolled strip using an infrared line sensor that provides a radiation-dependent signal whose signal edges indicate a detected end of tape.
  • the device according to the invention as claimed in claim 7 for operating a rolling train with at least one edger and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip can be achieved with a computing system comprising a sensor which is designed as an infrared line sensor, which is arranged in front of and / or behind the edger, wherein the infrared line sensor provides an output signal whose signal edges indicate a detected tape end.
  • the problem presented at the outset is the determination of the strip end position of the rolled strip, which is caused by poor environmental conditions, such as e.g. is made difficult by water or tinder on the rolled strip, is now solved with an infrared line sensor.
  • the infrared line sensor detects in a line the infrared radiation of the rolled strip emitted on a presettable measuring range.
  • the predeterminable measuring range is transverse to the strip running direction.
  • the advantage of this orientation, chosen transversely to the banding is that in addition to the band end detection, i. Band head (in the edger frame first incoming tape end) and band foot (the expiring in the edger frame end of the tape), also a band edge detection is performed.
  • Band head in the edger frame first incoming tape end
  • band foot the expiring in the edger frame end of the tape
  • a further advantageous embodiment of the use of the infrared line sensor is that the predeterminable measuring range extends along the direction of strip travel. In this orientation, cold spots lying transversely to the rolling belt do not affect the belt end detection because the measuring range set along the direction of belt travel covers an extended longitudinal region of the rolled strip, and thus also enables plausibility checks. These plausibility checks simultaneously represent a higher level of security and accuracy of the measured value recognition.
  • the detection of the tape end position takes place in front of the upsetting frame.
  • the detection of the tape end position takes place after the upsetting frame .
  • the detection of the tape end position takes place before and after the upsetting frame.
  • the hot rolling mill shown in FIG 1 is also referred to as reversing roughing.
  • 1 shows the excerpts of a reversing prerelease associated mechanical devices and an exemplary embodiment of the arrangement of the infrared line sensors 5 and 6 are shown.
  • a mechanical device shown are a blast furnace 1, a roller table 2 and a roller table 7, a stuffer box 3, a horizontal frame 4, two infrared line sensors 5 and 6 and the reversing roughing following finishing line 8 is a FIG 1 not shown rolled strip from the blast furnace-1 transported in the direction of roller table 7, this is referred to as an odd rolling pass. If the rolled strip is transported by the roller table 7 in the direction of the blast furnace 1, this is referred to as a straight pass.
  • the infrared line sensor 5 or 6 is used depending on the rolling direction. For odd rolling passes If the infrared line sensor 5 is used, in straight rolling passes, the infrared line sensor 6 is used for tape end detection. The individual whale stitches are repeated until the desired rolled strip thickness is reached. Subsequently, the rolled strip is transported with the roller table 7 in the direction of finishing mill 8.
  • the hot rolling mill shown in FIG 2 is also referred to as a continuous roughing.
  • the mechanical device shown is a blast furnace 10, the roller table 11, the infrared line sensors 12, 12' and 12 '', the edger stand 13, 13 'and 13' ', the horizontal stand 14, 14' and 14 '' and the continuous roughing following finishing line 15.
  • the rolled strip is transported from the blast furnace 10 in the direction of finishing mill 15.
  • FIG. 3 shows a signal course determined by the infrared line sensor.
  • the abscissa represents a time course showing a period of approximately 2 minutes and 50 seconds.
  • the ordinate shows the intensity of the thermal radiation of the rolled strip measured by the infrared line sensor.
  • the determination of the strip head of the rolled strip can be recognized by the increase in the intensity of the radiation.
  • the decrease in the intensity of the heat radiation shows the detection of the strip foot of the rolled strip by the infrared line sensor.
  • the illustrated diagram shows four rolled strip passes, ie the infrared line sensor has recorded four tape head and four tape foot signals.
  • the Walzband barn shown in the fourth graph shows strong fluctuations of the detected by the infrared line sensor signal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Metal Rolling (AREA)
  • Road Repair (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention relates to a method and device for operating a hot rolling train with at least one edger and at least one sensor with which the strip end position is determined by means of a linear recording of the infrared radiation from the rolled strip and whereby an optimization of the strip width distribution is achieved by means of a calculation system.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Warmwalzstraße mit mindestens einem Stauchgerüst und wenigstens einem Sensor zur Bestimmung der Bandendenposition, wobei mit einem Rechensystem eine Optimierung der Bandbreitenverteilung von mindestens einem Bandende eines Walzbandes erreicht wird.The invention relates to a method for operating a hot rolling mill with at least one edger stand and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip is achieved with a computing system.

Die Erfindung betrifft weiterhin eine Vorrichtung zum Betreiben einer Warmwalzstraße mit mindestens einem Stauchgerüst und wenigstens einem Sensor zur Bestimmung der Bandendenposition, wobei mit einem Rechensystem eine Optimierung der Bandbreitenverteilung von mindestens einem Bandende eines Walzbandes erreichbar ist.The invention further relates to an apparatus for operating a hot rolling mill with at least one edger stand and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip can be achieved with a computing system.

Eines der Hauptprobleme beim Walzen von Bändern, z.B. Bandstahl, ist das Erzielen einer rechteckigen Grundform mit einer über die Länge des Bandes konstanten Breite. In einer Warmwalzstraße dienen vertikale Walzgerüste, welche auch als Stauchgerüste bezeichnet werden, zur Steuerung der Bandbreite. Um eine günstige Bandendenausbildung und eine gute Bandbreitenkonstanz über die gesamte Bandlänge erreichen zu können, werden die Stauchgerüste mit schnellen hydraulischen Anstellsystemen ausgerüstet.One of the main problems when rolling ribbons, e.g. Strip steel is achieving a rectangular base shape with a constant width over the length of the strip. In a hot rolling mill vertical rolling stands, which are also referred to as upsetting frames, serve to control the bandwidth. In order to achieve a favorable belt end formation and a good bandwidth consistency over the entire belt length, the edging stands are equipped with fast hydraulic setting systems.

Werden die Stauchgerüste mit konstanter Anstellung gefahren, so wird das Walzband in der Regel an den Bandenden, also dem Bandkopf und dem Bandfuß, aufgrund des unsymmetrischen Materialflusses und anderer Effekte, schmaler als im Mittelteil. Ausgehend von der rechteckigen Walzbandform erhält man nach einem Stauchvorgang, d.h. bei dem Durchlauf des Walzbandes durch das Stauchgerüst, Breiteneinschnürungen an den Bandenden.If the upsetting frames are driven with a constant setting, the rolled strip usually becomes narrower at the strip ends, ie the strip head and the strip base, than in the middle part due to the asymmetrical material flow and other effects. Starting from the rectangular rolled strip form obtained after a compression process, ie during the passage of the rolled strip through the edger, width constrictions at the strip ends.

Der Spannungszustand während des Stauchvorganges führt zu einem sogenannten Anspitzen des Bandkopfes und damit zu Breitenmaßen, die, abhängig vom Stauchmaß, weit unter dem Anstellmaß des Stauchgerüstes liegen.The state of stress during the upsetting process leads to a so-called sharpening of the tape head and thus to width dimensions, which, depending on the compression dimension, are far below the Anstellmaß of the edger.

In ähnlicher Weise bewirkt dieser Umformprozess, abhängig vom Stauchmaß, auch am hinteren Bandende, d.h. am Bandfuß, negative Breitenabweichungen, wobei der in einem Horizontalgerüst nachfolgende Flachstich zu einer Walzbandkontur führt, die als Fischschwanzausbildung bekannt ist.Similarly, this forming process, depending on the compression dimension, also at the rear end of the tape, i. at the belt foot, negative width deviations, wherein the flat stitch following in a horizontal frame leads to a rolled strip contour, which is known as fish tail training.

Die an den Bandenden auftretenden Unterbreiten bzw. Breiteneinschnürungen sind in erster Linie auf die durch die Stauchgerüste eingeleiteten asymmetrischen Druck- und Scherspannungen im Bereich der Bandenden zurückzuführen, die wegen der fehlenden Materialabstützung zu einem erhöhten Materiallängsfluss im Bandkantenbereich führen. Bei fortschreitender Verformung tritt gleichzeitig mit Nachlassen der Längenformänderung eine Zunahme der Höhenformänderung ein, die zur Wulstbildung entlang der Bandkanten führt. Diese Wulstbildung entlang der Bandkanten wird auch als sogenannte Hundeknochenform bezeichnet.The widths or width constrictions occurring at the strip ends are primarily due to the asymmetric pressure and shear stresses in the region of the strip ends initiated by the upsetting stacks, which lead to an increased longitudinal material flow in the strip edge region due to the lack of material support. As the deformation progresses, an increase in the change in the shape of the height changes as the shape change changes, leading to beading along the strip edges. This bulge along the band edges is also referred to as a so-called dog bone form.

Um der Fischschwanzausbildung und der Ausbildung der sogenannten Hundeknochenform entgegenzuwirken, ist die Anstellposition der Stauchgerüste während des Banddurchlaufes verstellbar, wobei die Anstellung von dem Stauchgerüst beim Durchlaufen der Walzbandenden in Form kurzer Ausschläge, sogenannter "short strokes", relativ zum Mittelteil, weiter aufgefahren wird. Diese Anstellungskorrektur an den Bandenden des Walzbandes, d.h. am Bandkopf und am Bandfuß, erfolgt entsprechend einer Fahrkurve, die durch vorgegebene Fahrkurvenparameter definiert werden kann.In order to counteract the fishtail formation and the formation of the so-called dogbone shape, the Anstellposition the edger shoring during the band pass is adjustable, the employment of the edger stand when passing through the rolled strip ends in the form of short rashes, so-called "short strokes", relative to the middle part, further ascended. This adjustment correction at the strip ends of the rolled strip, i. on the tape head and on the belt foot, takes place in accordance with a travel curve, which can be defined by predetermined travel curve parameters.

Ein wesentlicher Bestandteil zur Vermeidung von Fischschwanzausbildung und der Hundeknochenform, ist die zeitrichtige Aufschaltung der Fahrkurve. Abhängig der Position des Walzbandes werden an den Walzbandenden, d.h. am Bandkopf und am Bandfuß, Anstellungskorrekturen an das Stauchgerüst aufgeschaltet. Um eine Korrektur der Anstellposition von einem Stauchgerüst durchführen zu können, ist die exakte Erkennung der Bandenden notwendig. Bisher wurden in diesem Bereich Sensoren eingesetzt, die auf Grund von widrigen Umgebungsbedingungen, wie z.B. Wasser und Zunder, kein zuverlässiges Messsignal für die Bandendenerkennung erzeugten.An integral part to avoid fishtail training and the dogbone shape is the timely Connection of the travel curve. Depending on the position of the rolled strip, adjustment corrections are applied to the upsetting frame at the ends of the rolled strip, ie at the strip head and at the strip foot. In order to be able to carry out a correction of the setting position of a compression frame, the exact detection of the tape ends is necessary. So far, sensors have been used in this area, which did not produce a reliable signal for the detection of band end due to adverse environmental conditions, such as water and scale.

Aus dem Aufsatz "Breitenregelung in der Breitbandstraße der Voest-Alpine Stahl AG", Reinhold Fogel, Stahl und Eisen, Verlag Stahleisen GmbH, Düsseldorf, Band 110, Nr. 11, November 1990, Seiten 95 bis 99 und 195, ist es bekannt in einer Warmbreitbandstraße ein Stauchgerüst mit Funktionen zur Kompensation der Fischschwanzausbildung am Brammenanfang und -ende und zur Ausregelung eines veränderlichen Breitenverlaufs über die Brammenlänge vorzusehen. Dabei wird zur Verfolgung der Walzgutposition in einem konstanten Wegraster und des dazu synchronen Walzvorgangs im Stauchgerüst jeweils ein Lasersensor eingesetzt. Eine vergleichbare Offenbarung findet sich auch in dem Aufsatz "Revamping the hot strip mill at Egyptian Iron & Steel", Reinhold Fogel et al., Steel Times International, FMJ International Publication, Redhill, Surrey, England, Band 20, Nr. 2, März 1996, Seiten 23, 25 und 28.From the article "width control in the broadband line of Voest Alpine Steel AG", Reinhold Fogel, Stahl and Eisen, Verlag Stahleisen GmbH, Dusseldorf, Volume 110, No. 11, November 1990, pages 95 to 99 and 195, it is known in a hot strip mill a Stauchgerüst with functions to compensate for the fish tail training at the beginning and end of the slab and to regulate a variable width profile over the slab length provided. In this case, a laser sensor is used in each case for tracking the rolling stock position in a constant grid and the synchronous rolling process in the edger. A similar disclosure can also be found in the article "Revamping the hot strip mill at Egyptian Iron & Steel", Reinhold Fogel et al., Steel Times International, FMJ International Publication, Redhill, Surrey, England, Vol. 20, No. 2, March 1996, pages 23, 25 and 28.

Aus der EP 0 068 431 A2 ist eine Vorrichtung zur Erkennung der Formen von Walzgutenden bekannt, welche eine erste Streifenbildkamera enthält, mit der die Walzgutoberfläche während der Bewegung erfasst wird. Die Aufnahmeelemente der ersten Kamera sind quer zur Bewegungsrichtung des Walzgutes angeordnet. Die Kamera wird von einem der Walzgutgeschwindigkeit proportionalen Signal synchronisiert und in einen Bildspeicher eingegeben, mit dem eine Auswerteeinrichtung verbunden ist, die für eine bestimmte Schopfform eine Schnittlinie festlegt.From EP 0 068 431 A2 a device for detecting the shapes of rolling stock ends is known, which contains a first strip camera, with which the rolling stock surface is detected during the movement. The receiving elements of the first camera are arranged transversely to the direction of movement of the rolling stock. The camera is synchronized by a signal proportional to the rolling stock speed and entered into an image memory, with which an evaluation device is connected, which defines a cutting line for a particular Schopfform.

Aufgabe der Erfindung ist es, ein Verfahren zum Betreiben einer Warmwalzstraße mit mindestens einem Stauchgerüst und mit wenigstens einem Sensor zur Bestimmung der Bandendenposition zu finden, mit dem eine zuverlässigere Bestimmung der Bandendenposition des Walzbandes erreicht wird.The object of the invention is to find a method for operating a hot rolling mill with at least one edger and at least one sensor for determining the belt end position, with a more reliable determination of the belt end position of the rolled strip is achieved.

Der Erfindung liegt weiterhin die Aufgabe zugrunde, eine Vorrichtung zum Betreiben einer Warmwalzstraße mit mindestens einem Stauchgerüst und mit wenigstens einem Sensor zur Bestimmung der Bandendenposition zu finden, das eine zuverlässigere Bestimmung der Bandendenposition von dem Walzband ermöglicht.The invention is further based on the object of finding an apparatus for operating a hot rolling mill with at least one edger stand and with at least one sensor for determining the belt end position, which enables a more reliable determination of the belt end position of the rolled strip.

Die Aufgabe wird erfindungsgemäß durch ein Verfahren gemäß Anspruch 1 gelöst. Die Aufgabe wird weiterhin erfindungsgemäß durch eine Vorrichtung nach Anspruch 7 gelöst. Vorteilhafte Weiterbildungen des Verfahrens und der Vorrichtung sind in den weiteren Ansprüchen angegeben.The object is achieved by a method according to claim 1. The object is further achieved by a device according to claim 7. Advantageous developments of the method and the device are specified in the further claims.

Das erfindungsgemäße Verfahren nach Anspruch 1 umfasst eine zur Bestimmung der Bandendenposition zeilenförmige Erfassung der Infrarotstrahlung des Walzbandes unter Verwendung eines Infrarotzeilensensors, der ein strahlungsabhängiges Signal liefert, dessen Signalflanken ein erfasstes Bandende anzeigen.The inventive method according to claim 1 comprises a line for detecting the tape end position detection of the infrared radiation of the rolled strip using an infrared line sensor that provides a radiation-dependent signal whose signal edges indicate a detected end of tape.

Die erfindungsgemäße Vorrichtung nach Anspruch 7 zum Betreiben einer Walzstraße mit mindestens einem Stauchgerüst und wenigstens einem Sensor zur Bestimmung der Bandendenposition, wobei mit einem Rechensystem eine Optimierung der Bandbreitenverteilung von mindestens einem Bandende eines Walzbandes erreichbar ist, umfasst einen Sensor der als ein Infrarotzeilensensor ausgebildet ist, der vor und/oder hinter dem Stauchgerüst angeordnet ist, wobei der Infrarotzeilensensor ein Ausgangssignal liefert, dessen Signalflanken ein erfasstes Bandende anzeigen.The device according to the invention as claimed in claim 7 for operating a rolling train with at least one edger and at least one sensor for determining the belt end position, wherein an optimization of the bandwidth distribution of at least one belt end of a rolled strip can be achieved with a computing system comprising a sensor which is designed as an infrared line sensor, which is arranged in front of and / or behind the edger, wherein the infrared line sensor provides an output signal whose signal edges indicate a detected tape end.

Die eingangs dargestellte Problematik der Bestimmung der Bandendenposition von dem Walzband, welche durch schlechte Umgebungsbedingungen, wie z.B. durch auf dem Walzband befindlichen Wasser oder auch Zunder, erschwert wird, wird nunmehr mit einem Infrarotzeilensensor gelöst. Der Infrarotzeilensensor erfasst zeilenförmig die auf einem vorgebbaren Messbereich abgegebene Infrarotstrahlung des Walzbandes.The problem presented at the outset is the determination of the strip end position of the rolled strip, which is caused by poor environmental conditions, such as e.g. is made difficult by water or tinder on the rolled strip, is now solved with an infrared line sensor. The infrared line sensor detects in a line the infrared radiation of the rolled strip emitted on a presettable measuring range.

Eine vorteilhafte Ausgestaltung bei der Verwendung des Infrarotzeilensensor liegt darin, dass der vorgebbare Messbereich quer zur Bandlaufrichtung verläuft. Vorteil dieser quer zum Bandverlauf gewählten Ausrichtung liegt darin, dass zusätzlich zu der Bandendenerkennung, d.h. Bandkopf (das im Stauchgerüst zuerst einlaufende Bandende) und Bandfuß (das im Stauchgerüst auslaufende Bandende), auch noch eine Bandkantenerkennung durchgeführt wird. Hier wird die Bandbreitenposition, bezogen auf die in Längsrichtung des Walzbandes verlaufende Walzbandmitte, ermittelt.An advantageous embodiment of the use of the infrared line sensor is that the predeterminable measuring range is transverse to the strip running direction. The advantage of this orientation, chosen transversely to the banding, is that in addition to the band end detection, i. Band head (in the edger frame first incoming tape end) and band foot (the expiring in the edger frame end of the tape), also a band edge detection is performed. Here, the bandwidth position, based on the rolled strip center running in the longitudinal direction of the rolled strip, is determined.

Eine weitere vorteilhafte Ausgestaltung der Verwendung des Infrarotzeilensensors liegt darin, dass der vorgebbare Messbereich längs zur Bandlaufrichtung verläuft. Bei dieser Ausrichtung beeinflussen quer zum Walzband liegende Kaltstellen die Bandendenerkennung nicht, da der längs zur Bandlaufrichtung eingestellte Messbereich einen erweiterten Längsbereich des Walzbandes erfasst, und somit auch Plausibilitätsprüfungen ermöglichen. Diese Plausibilitätsprüfungen stellen gleichzeitig ein höheres Maß an Sicherheit und Genauigkeit der Messwerterkennung dar.A further advantageous embodiment of the use of the infrared line sensor is that the predeterminable measuring range extends along the direction of strip travel. In this orientation, cold spots lying transversely to the rolling belt do not affect the belt end detection because the measuring range set along the direction of belt travel covers an extended longitudinal region of the rolled strip, and thus also enables plausibility checks. These plausibility checks simultaneously represent a higher level of security and accuracy of the measured value recognition.

Gemäß einer vorteilhaften Ausgestaltung nach Anspruch 4 erfolgt die Erfassung der Bandendenposition vor dem Stauchgerüst.According to an advantageous embodiment according to claim 4, the detection of the tape end position takes place in front of the upsetting frame.

In einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Verfahrens erfolgt die Erfassung der Bandendenposition nach dem Stauchgerüst..In a further advantageous embodiment of the method according to the invention, the detection of the tape end position takes place after the upsetting frame ..

Gemäß einer vorteilhaften Ausgestaltung nach Anspruch 6 erfolgt die Erfassung der Bandendenposition vor und nach dem Stauchgerüst.According to an advantageous embodiment according to claim 6, the detection of the tape end position takes place before and after the upsetting frame.

Die Erfindung sowie weitere Vorteile und Details werden im folgenden anhand von schematisch dargestellten Ausführungsbeispielen in der Zeichnung näher erläutert. Es zeigen:

FIG 1
eine dargestellte Warmwalzstraße (reversierende Vorstraße) mit einer ersten Ausführungsform der erfindungsgemäßen Vorrichtung,
FIG 2
eine dargestellte Warmwalzstraße (durchlaufende Vorstraße) mit einer zweiten Ausführungsform der erfindungsgemäßen Vorrichtung,
FIG 3
ein vom Infrarotzeilensensor ermittelter Signalverlauf.
The invention and further advantages and details are explained below with reference to schematically illustrated embodiments in the drawing. Show it:
FIG. 1
an illustrated hot rolling line (reversing roughing) with a first embodiment of the device according to the invention,
FIG. 2
an illustrated hot rolling line (continuous roughing) with a second embodiment of the device according to the invention,
FIG. 3
a detected by the infrared line sensor waveform.

Die in FIG 1 dargestellte Warmwalzstraße wird auch als reversierende Vorstraße bezeichnet. In der FIG 1 sind auszugsweise die einer reversierenden Vorstraße zugehörigen mechanischen Einrichtungen sowie eine beispielhafte Ausführung der Anordnung der Infrarotzeilensensoren 5 und 6 gezeigt. Als mechanische Einrichtung sind gezeigt ein Stoßofen 1, ein Rollgang 2 und ein Rollgang 7, ein Stauchgerüst 3, ein Horizontalgerüst 4, zwei Infrarotzeilensensoren 5 und 6 sowie die der reversierenden Vorstraße folgende Fertigstraße 8. Wird ein FIG 1 nicht dargestelltes Walzband vom Stoßofen-1 in Richtung Rollgang 7 transportiert, so wird dies als ungerader Walzstich bezeichnet. Wird das Walzband von dem Rollgang 7 in Richtung Stoßofen 1 transportiert, so wird dies als gerader Walzstich bezeichnet. Abhängig von der Walzrichtung wird entweder der Infrarotzeilensensor 5 oder 6 benutzt. Bei ungeraden Walzstichen wird der Infrarotzeilensensor 5, bei geraden Walzstichen wird der Infrarotzeilensensor 6 für die Bandendenerkennung verwendet. Die einzelnen Walsstiche werden so oft wiederholt, bis die gewünschte Walzbanddicke erreicht ist. Anschließend wird das Walzband mit dem Rollgang 7 in Richtung Fertigstraße 8 transportiert.The hot rolling mill shown in FIG 1 is also referred to as reversing roughing. 1 shows the excerpts of a reversing prerelease associated mechanical devices and an exemplary embodiment of the arrangement of the infrared line sensors 5 and 6 are shown. As a mechanical device shown are a blast furnace 1, a roller table 2 and a roller table 7, a stuffer box 3, a horizontal frame 4, two infrared line sensors 5 and 6 and the reversing roughing following finishing line 8 is a FIG 1 not shown rolled strip from the blast furnace-1 transported in the direction of roller table 7, this is referred to as an odd rolling pass. If the rolled strip is transported by the roller table 7 in the direction of the blast furnace 1, this is referred to as a straight pass. Depending on the rolling direction, either the infrared line sensor 5 or 6 is used. For odd rolling passes If the infrared line sensor 5 is used, in straight rolling passes, the infrared line sensor 6 is used for tape end detection. The individual whale stitches are repeated until the desired rolled strip thickness is reached. Subsequently, the rolled strip is transported with the roller table 7 in the direction of finishing mill 8.

Die in FIG 2 dargestellte Warmwalzstraße wird auch als durchlaufende Vorstraße bezeichnet. In der FIG 2 sind auszugsweise die einer durchlaufenden Vorstraße zugehörigen mechanischen Einrichtungen sowie eine beispielhafte Ausführung der Anordnung der Infrarotzeilensensoren 12, 12' und 12" gezeigt. Als mechanische Einrichtung sind gezeigt ein Stoßofen 10, der Rollgang 11, die Infrarotzeilensensoren 12, 12' und 12'', die Stauchgerüst 13, 13' und 13'', die Horizontalgerüst 14, 14' und 14'' sowie die der durchlaufenden Vorstraße folgende Fertigstraße 15. Das Walzband wird vom Stoßofen 10 Richtung Fertigstraße 15 transportiert. Die jeweils vor den Stauchgerüsten 13, 13' und 13'' positionierten Infrarotzeilensensoren 12, 12' und 12'' erfassen die Bandenden. Abhängig der Bandendenerkennung werden Anstellkorrekturen auf die Stauchgerüste 13, 13' und 13'' aufgeschaltet. Nach dem Durchlauf des Walzbandes, d.h., wenn der Bandfuß des Walzbandes das letzte Horizontalgerüst 14'' verlassen hat, wird das Walzband Richtung Fertigstraße 15 transportiert.The hot rolling mill shown in FIG 2 is also referred to as a continuous roughing. The mechanical devices belonging to a continuous roughing street and an exemplary embodiment of the arrangement of the infrared line sensors 12, 12 'and 12 "are shown in excerpts in FIG 2. The mechanical device shown is a blast furnace 10, the roller table 11, the infrared line sensors 12, 12' and 12 '', the edger stand 13, 13 'and 13' ', the horizontal stand 14, 14' and 14 '' and the continuous roughing following finishing line 15. The rolled strip is transported from the blast furnace 10 in the direction of finishing mill 15. The each before the edger stands 13, 13 'and 13 "position the tape ends Depending on the tape end detection, pitch corrections are applied to the edger stands 13, 13' and 13" after the passage of the rolled strip, ie when the Belt foot of the rolled strip has left the last horizontal frame 14 '', the rolled strip is transported in the direction of finishing line 15.

In FIG 3 ist ein vom Infrarotzeilensensor ermittelter Signalverlauf gezeigt. Auf der Abszisse ist ein Zeitverlauf dargestellt, der einen Zeitraum von ungefähr 2 Minuten und 50 Sekunden zeigt. Auf der Ordinate ist die vom Infrarotzeilensensor gemessene Intensität der Wärmestrahlung des Walzbandes dargestellt. Die Ermittlung des Bandkopfes des Walzbandes ist durch das Ansteigen der Intensität der Strahlung zu erkennen. Das Abnehmen der Intensität der Wärmestrahlung zeigt die Erkennung des Bandfußes des Walzbandes durch den Infrarotzeilensensor. In dem dargestellten Diagramm sind vier Walzbanddurchläufe zu sehen, d.h. der Infrarotzeilensensor hat vier Bandkopf- und vier Bandfußsignale erfasst. Der in dem Diagramm vierte dargestellte Walzbanddurchlauf zeigt starke Fluktuationen des von dem Infrarotzeilensensors ermittelten Signales. Diese Fluktuationen der erfassten Intensität der Wärmestrahlung des Walzbandes entstehen aufgrund von schlechten Umgebungsbedingungen, wie z.B. durch Wasserdampf. Diese Einflüsse sind jedoch eindeutig von der Wärmestrahlung des Walzbandes unterscheidbar, und beeinflussen somit die eindeutige Bandfußerkennung des Walzbandes nicht.FIG. 3 shows a signal course determined by the infrared line sensor. The abscissa represents a time course showing a period of approximately 2 minutes and 50 seconds. The ordinate shows the intensity of the thermal radiation of the rolled strip measured by the infrared line sensor. The determination of the strip head of the rolled strip can be recognized by the increase in the intensity of the radiation. The decrease in the intensity of the heat radiation shows the detection of the strip foot of the rolled strip by the infrared line sensor. The illustrated diagram shows four rolled strip passes, ie the infrared line sensor has recorded four tape head and four tape foot signals. The Walzbanddurchlauf shown in the fourth graph shows strong fluctuations of the detected by the infrared line sensor signal. These fluctuations in the detected intensity of the thermal radiation of the rolled strip arise due to poor environmental conditions, such as by water vapor. However, these influences are clearly distinguishable from the heat radiation of the rolled strip, and thus do not affect the unique Bandfußerkennung the rolled strip.

Claims (10)

  1. Method for operating a hot rolling train with at least one edger (3, 13, 13', 13") and at least one sensor for determining the position of the ends of the strip, an optimization of a strip width distribution of at least one end of a rolled strip being achieved by means of a calculating system, characterized in that the position of the ends of the strip is determined by means of a linear recording of the infrared radiation from the rolled strip using an infrared linear sensor (5, 6, 12, 12', 12") which supplies a radiation-dependent output signal, whose signal edges indicate a recorded end of the strip.
  2. Method according to Claim 1, characterized in that the measuring area of the infrared linear sensor (5, 6, 12, 12', 12") runs transversely in relation to the running direction of the strip.
  3. Method according to Claim 1, characterized in that the measuring area of the infrared linear sensor (5, 6, 12, 12', 12") runs longitudinally in relation to the running direction of the strip.
  4. Method according to Claim 2 or 3, characterized in that the position of the ends of the strip is recorded upstream of the edger (3, 13, 13', 13").
  5. Method according to Claim 2 or 3, characterized in that the position of the ends of the strip is recorded downstream of the edger (3).
  6. Method according to Claim 2 or 3, characterized in that the position of the ends of the strip is recorded upstream and downstream of the edger (3).
  7. Device for operating a hot rolling train with at least one edger (3, 13, 13', 13") and at least one sensor for determining the position of the ends of the strip, an optimization of the strip width distribution of at least one end of a rolled strip being achievable by means of a calculating system, and the sensor being designed as an infrared linear sensor (5, 6, 12, 12', 12") which records infrared radiation and supplies an output signal, whose signal edges indicate a recorded end of the strip.
  8. Device according to Claim 7, characterized in that the infrared linear sensor (5, 6, 12, 12', 12") is arranged upstream of the edger (3, 13, 13', 13").
  9. Device according to Claim 7, characterized in that the infrared linear sensor (6) is arranged downstream of the edger (3).
  10. Device according to Claim 7, characterized in that an infrared linear sensor (5) is arranged upstream and an infrared linear sensor (6) is arranged downstream of the edger (3).
EP01980167A 2000-09-29 2001-09-17 Method and device for operating a hot rolling train with at least one edger Expired - Lifetime EP1320425B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10048470A DE10048470A1 (en) 2000-09-29 2000-09-29 Method and device for operating a hot rolling mill with at least one compression stand
DE10048470 2000-09-29
PCT/DE2001/003582 WO2002026408A1 (en) 2000-09-29 2001-09-17 Method and device for operating a hot rolling train with at least one edger

Publications (2)

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EP1320425A1 EP1320425A1 (en) 2003-06-25
EP1320425B1 true EP1320425B1 (en) 2006-05-24

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EP01980167A Expired - Lifetime EP1320425B1 (en) 2000-09-29 2001-09-17 Method and device for operating a hot rolling train with at least one edger

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US (1) US6786071B2 (en)
EP (1) EP1320425B1 (en)
JP (1) JP2004509763A (en)
AT (1) ATE327057T1 (en)
DE (2) DE10048470A1 (en)
ES (1) ES2263666T3 (en)
WO (1) WO2002026408A1 (en)

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DE10048470A1 (en) 2000-09-29 2002-04-25 Siemens Ag Method and device for operating a hot rolling mill with at least one compression stand
EP1907595A1 (en) * 2005-07-20 2008-04-09 Euroball S.P.A. Heat-treating of rolling elements for bearings, and furnace for implementing such treatment
GB2468913B (en) 2009-03-27 2011-02-16 Siemens Vai Metals Tech Ltd Fully hydraulic edger for plate mills
CN103128107B (en) * 2013-03-14 2015-10-07 北京科技大学 A kind of on-line calculation method of rougher of hot strip mill short stroke parameter of curve
JP7191532B2 (en) * 2018-03-22 2022-12-19 日鉄エンジニアリング株式会社 Rolling mill and method for manufacturing rolled steel
KR20200135487A (en) * 2018-03-28 2020-12-02 신토고교 가부시키가이샤 Roll press device, control system of roll press device, and control method of roll press device

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DE2725353A1 (en) * 1977-06-04 1979-04-19 Nukem Gmbh METHOD AND DEVICE FOR MEASURING THE LENGTH OF MOVING SHAPED BODIES, IN PARTICULAR OF RED-HOT SEMI-PRODUCTS
JPS5469556A (en) * 1977-11-14 1979-06-04 Sumitomo Metal Ind Ltd Controlling method for sheet breadth in hot rolling work
EP0057290A1 (en) * 1981-02-02 1982-08-11 Hoogovens Groep B.V. Temperature scanner
DE3117360A1 (en) * 1981-05-02 1982-11-18 Eltro GmbH, Gesellschaft für Strahlungstechnik, 6900 Heidelberg Device for testing rolled material for defect detection
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GB2101918A (en) * 1981-07-22 1983-01-26 Europ Electronic Syst Ltd Control for roughing train
JPS60255209A (en) * 1984-05-30 1985-12-16 Mitsubishi Heavy Ind Ltd Method for controlling edger gap in rolling mill
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DE19522494C2 (en) * 1994-07-07 1997-06-19 Siemens Ag Process for rolling a metal strip
DE19744504B4 (en) * 1997-10-09 2004-05-06 Sms Demag Ag Rolling process for strip material in a rolling mill
DE10048470A1 (en) 2000-09-29 2002-04-25 Siemens Ag Method and device for operating a hot rolling mill with at least one compression stand

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US20030164017A1 (en) 2003-09-04
EP1320425A1 (en) 2003-06-25
WO2002026408A1 (en) 2002-04-04
US6786071B2 (en) 2004-09-07
JP2004509763A (en) 2004-04-02
DE10048470A1 (en) 2002-04-25
ATE327057T1 (en) 2006-06-15
ES2263666T3 (en) 2006-12-16
DE50109898D1 (en) 2006-06-29

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