EP1899086A1 - Method and apparatus for manufacturing a metal strip - Google Patents

Method and apparatus for manufacturing a metal strip

Info

Publication number
EP1899086A1
EP1899086A1 EP06753734A EP06753734A EP1899086A1 EP 1899086 A1 EP1899086 A1 EP 1899086A1 EP 06753734 A EP06753734 A EP 06753734A EP 06753734 A EP06753734 A EP 06753734A EP 1899086 A1 EP1899086 A1 EP 1899086A1
Authority
EP
European Patent Office
Prior art keywords
metal strip
strip
cameras
tension
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06753734A
Other languages
German (de)
French (fr)
Other versions
EP1899086B1 (en
Inventor
Wolfgang Denker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1899086A1 publication Critical patent/EP1899086A1/en
Application granted granted Critical
Publication of EP1899086B1 publication Critical patent/EP1899086B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips

Definitions

  • the invention relates to a method for producing a metal strip, in which the metal strip is guided over a number of rollers under such a belt tension and moved in a conveying direction, that it is largely flat at least between two rollers. Furthermore, the invention relates to a device for producing a metal strip.
  • the metal strip is frequently subjected to a flatness measurement following the rolling process, with unevenness of the strip being determined.
  • flatness measuring rollers which are pressed with a predetermined biasing force against the energized and moved metal strip. By measuring the crushing of the flatness measuring roll as a result of unevenness in the strip from the metal strip, it is possible to deduce the present irregularities in the metal strip. Also known are systems that visualize the voltage differences via vibrations.
  • JP 2000046752 A discloses an optical system comprising a lighting device for
  • BEST ⁇ TIGUNGSKOPlM which has tape and cameras. This makes it possible to measure the surface of the metal strip three-dimensionally and to present the measurement result.
  • the flatness of the metal strip can also be determined with a device as known from EP 1 418 400 A2. Flatness deviations are also determined by means of a camera (CCD camera: charge coupled device - camera).
  • CCD camera charge coupled device - camera
  • the stress distribution over the width of the metal strip can be visualized in order to be able to draw conclusions about the strip quality.
  • the device should be as space-saving as possible for this determination and do not require much effort during installation and operation.
  • the invention is therefore based on the object, a method and an associated device of the type mentioned in such a way that it is possible borrowed to win even under high tape tension information that allow control of the manufacturing process in such a way that the ribbon quality can be optimized.
  • the metal strip is measured optically not, but the optically visible tensile stresses are measured in the metal strip and used in the assessment of strip quality and possibly the control or regulation of the manufacturing process.
  • unevenness of the band is detected by different states of tension in the band and insofar as the unevenness is assessed indirectly via the voltages.
  • a further training provides that the strip tension exerted on the metal strip is selected as a function of the determined tensile stresses in the metal strip. In this case, it is preferred to proceed in such a way that, with increasing tensile stress in the metal strip, the strip tension exerted on the metal strip is increased.
  • the metal strip is preferably irradiated with a light source and recorded with two cameras from two different directions.
  • the tensile stresses acting in the metal band which can be determined with the mentioned procedure, are preferably determined several times at short time intervals.
  • the change in the tensile stresses acting in the metal strip can be achieved by comparing a number of in time determined tensile stresses are detected. By means of a large number of consecutive pictures within a short time, tension pictures can also be displayed for fast moving tapes.
  • the device for producing a metal strip has a number of rollers, over which the metal strip is guided under such a belt tension and moved in a conveying direction, that it is largely flat at least between two rollers.
  • at least one light source illuminating the metal strip is arranged between two rollers and at least one, preferably two, cameras are arranged in the area of the light source, which record the illuminated metal strip, the system consisting of light source and camera or cameras Determining the tensile stresses acting in the metal strip is suitable.
  • two cameras are preferably present, which are arranged at a distance from one another, so that they receive the metal strip from two different directions.
  • the cameras are preferably of digital design.
  • recording means may be present which store the image taken by the camera or the cameras at short time intervals.
  • the recording means can be connected to evaluation means which are suitable for comparing the images recorded by the camera or the cameras.
  • the metal strip 1 is rolled in the left portion of the figure in a rolling range of two work rolls 11 and 12, which are supported by two back-up rolls 13 and 14.
  • the metal strip 1 is then conveyed in a conveying direction F at a predetermined conveying speed, wherein it is kept below a defined belt tension S.
  • the belt tension S is maintained by guiding the metal belt 1 in the manner outlined, i. H. it is in particular - on the right side of the figure - guided by two rollers 4 and 5 S-shaped, so that a desired level of belt tension S between the rollers 11, 12 and the rollers 4, 5 can be maintained.
  • the metal strip 1 Due to the belt tension S, the metal strip 1 has a high degree of flatness, d. H. the surface irregularities are low.
  • the metal strip 1 is therefore guided largely flat.
  • a light source 6 is arranged, with which the surface of the metal strip 1 can be illuminated.
  • two cameras 7 and 8 are mounted in two different locations, which can take two pictures from the tape surface.
  • the system consisting of the light source 6 and the cameras 7 and 8, which is suitable for carrying out the procedure according to the invention, is known, for example, under the name Q-400 as Digital 3D Correlation System from DANTEC Ettemeyer GmbH, Elchingen, Germany (www .dantec- ettemeyer.com) are known and available.
  • Q-400 Digital 3D Correlation System from DANTEC Ettemeyer GmbH, Elchingen, Germany (www .dantec- ettemeyer.com) are known and available.
  • the available system is well suited to visualize internal stresses in the largely flat metal strip and evaluate, even if this Bandzugschwankache should be necessary to a small extent.
  • the cameras 7, 8 are connected to a recording means 9 which is capable of storing a plurality of recordings in a short time.
  • the recorded images can be evaluated in a subsequent evaluation means 10, it being possible in particular to observe the distribution of the tensile stresses in the metal strip 1 and their temporal change. Depending on this, the manufacturing process for the metal strip 1 can be influenced.
  • a strip tension is maintained in the metal strip 1 in the measurement of the voltages, which corresponds to at least 10% of the yield strength of the material of the metal strip.
  • the use of the determined voltages or voltage differences in the metal strip 1 in the manufacture of the metal strip 1 may already consist in that the stresses are observed in the strip and only in case of need, d. H. If voltage distribution ratios in the band exceed an impermissible value, measures are taken.
  • the values determined are controlled in the closed loop directly in the production process of the metal strip.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Control Of Metal Rolling (AREA)
  • Advancing Webs (AREA)
  • Coating With Molten Metal (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Abstract

An apparatus for manufacturing a metal strip (1) includes a number of rolls (2, 3, 4, 5) over which the metal strip (1) is guided in a transporting direction under a strip tension that insures that the strip is flat to a large extent at least between two rolls (2, 3) and a light source (6) operable for illuminating an area of the metal strip (1) as it moves in the transporting direction. Two cameras (7, 8), which are located in a region of the light source (6) at a distance from each other, are operable for photographing the area of the metal strip (1) illuminated by the light source from two different directions.

Description

Verfahren und Vorrichtung zur Herstellung eines MetallbandesMethod and device for producing a metal strip
Die Erfindung betrifft ein Verfahren zur Herstellung eines Metallbandes, bei dem das Metallband über eine Anzahl Rollen unter einer solchen Bandspannung geführt und in eine Förderrichtung bewegt wird, dass es zumindest zwischen zwei Rollen weitgehend eben ist. Des Weiteren betrifft die Erfindung eine Vor- richtung zur Herstellung eines Metallbandes.The invention relates to a method for producing a metal strip, in which the metal strip is guided over a number of rollers under such a belt tension and moved in a conveying direction, that it is largely flat at least between two rollers. Furthermore, the invention relates to a device for producing a metal strip.
Beim Walzen sowie Nachwalzen von Metallbändern ist die Planheit neben der Dicke und der Sauberkeit des Bandes ein entscheidender Qualitätsfaktor. Bei der Herstellung eines Metallbandes ist es daher erforderlich, zwecks Qualitäts- Sicherung der Produktion eine Bandinspektion vorzunehmen, wobei im gegebenen Falle aufgrund des ermittelten Inspektionsergebnisses auf den Herstel- lungsprozess Einfluss genommen werden muss.When rolling and re-rolling metal strips, the flatness is a decisive quality factor in addition to the thickness and cleanliness of the strip. When producing a metal strip, it is therefore necessary to perform a strip inspection in order to ensure the quality of the production, in which case the manufacturing process must be influenced in the given case on the basis of the determined inspection result.
Das Metallband wird hierzu im Anschluss an den Walzvorgang häufig einer Planheitsmessung unterzogen, wobei Unebenheiten des Bandes ermittelt werden sollen. Hierfür sind Planheitsmessrollen bekannt, die mit einer vorgegebenen Vorspannkraft gegen das unter Spannung geführte und bewegte Metallband gedrückt werden. Durch Messung der Abdrückung der Planheitsmessrolle infolge von Bandunebenheiten vom Metallband kann auf die vorliegenden Un- ebenheiten im Metallband geschlossen werden. Bekannt sind auch Systeme, die über Schwingungen die Spannungsunterschiede visualisieren.For this purpose, the metal strip is frequently subjected to a flatness measurement following the rolling process, with unevenness of the strip being determined. For this purpose, flatness measuring rollers are known which are pressed with a predetermined biasing force against the energized and moved metal strip. By measuring the crushing of the flatness measuring roll as a result of unevenness in the strip from the metal strip, it is possible to deduce the present irregularities in the metal strip. Also known are systems that visualize the voltage differences via vibrations.
Unebenheiten im Metallband können nicht nur mittels kontaktierender Rollen, sondern auch kontaktlos ermittelt werden. Hierfür offenbart beispielsweise die JP 2000046752 A ein optisches System, das eine Beleuchtungseinrichtung fürUnevenness in the metal strip can be determined not only by means of contacting rollers, but also contactless. For this purpose, for example, JP 2000046752 A discloses an optical system comprising a lighting device for
BESTÄTIGUNGSKOPlM das Band und Kameras aufweist. Damit ist es möglich, die Oberfläche des Metallbandes dreidimensional zu vermessen und das Messergebnis darzustellen.BESTÄTIGUNGSKOPlM which has tape and cameras. This makes it possible to measure the surface of the metal strip three-dimensionally and to present the measurement result.
Die Planheit des Metallbandes kann auch mit einer Vorrichtung ermittelt werden, wie sie aus der EP 1 418 400 A2 bekannt ist. Auch hier werden Planheits- abweichungen mittels einer Kamera (CCD-Kamera: Charge-coupled-device - Kamera) ermittelt.The flatness of the metal strip can also be determined with a device as known from EP 1 418 400 A2. Flatness deviations are also determined by means of a camera (CCD camera: charge coupled device - camera).
Ähnliche Systeme sind aus der DE 197 58 466 A1 und aus der DE 199 32 324 A1 bekannt.Similar systems are known from DE 197 58 466 A1 and DE 199 32 324 A1.
In all den vorgenannten Fällen werden Unebenheiten der Bandoberfläche gemessen und hierauf gegebenenfalls durch Veränderung der Prozessparameter reagiert.In all the aforementioned cases, unevennesses of the strip surface are measured and, if appropriate, reacted by changing the process parameters.
Es hat sich herausgestellt, dass insbesondere unter entsprechendem Bandzug das Messergebnis schwierig zu interpretieren ist, da in Abhängigkeit des Bandzuges, das im Metallband wirkt, die Planheit verändert wird. D. h. aufgrund des Bandzuges, dem das Walzgut beim Walzprozess ausgesetzt ist, lassen sich Spannungsunterschiede über die Bandbreite in Form von Welligkeiten bzw. Unplanheiten nicht oder nur schwer erkennen.It has been found that the measurement result is difficult to interpret, especially under a corresponding strip tension, since the flatness is changed as a function of the strip tension which acts in the metal strip. Ie. Due to the strip tension, which is exposed to the rolling stock during the rolling process, voltage differences over the bandwidth in the form of ripples or unevenness can not or only with difficulty be recognized.
Insbesondere ist es wünschenswert, dass die Spannungsverteilung über der Breite des Metallbandes visualisiert werden kann, um Rückschlüsse auf die Bandqualität ziehen zu können. Dabei soll die Vorrichtung für diese Ermittlung möglichst platzsparend sein und keinen hohen Aufwand bei der Installation und beim Betrieb erfordern.In particular, it is desirable that the stress distribution over the width of the metal strip can be visualized in order to be able to draw conclusions about the strip quality. The device should be as space-saving as possible for this determination and do not require much effort during installation and operation.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine zugehörige Vorrichtung der eingangs genannten Art so weiterzubilden, dass es mög- lieh ist, auch unter hoher Bandspannung die Informationen zu gewinnen, die eine Steuerung des Herstellprozesses in einer solcher Weise erlauben, dass die Bandqualität optimiert werden kann.The invention is therefore based on the object, a method and an associated device of the type mentioned in such a way that it is possible borrowed to win even under high tape tension information that allow control of the manufacturing process in such a way that the ribbon quality can be optimized.
Diese Aufgabe wird durch die Erfindung verfahrensgemäß dadurch gelöst, dass in dem unter Zugspannung weitgehend ebenen Metallband zwischen den min- destens zwei Rollen die im Metallband wirkenden inneren Zugspannungen optisch sichtbar gemacht werden und die so ermittelten Zugspannungen oder Zugspannungsdifferenzen bei der Herstellung des Metallbandes verwertet werden. Als Rollen werden hierbei auch die vorhandenen Arbeitswalzen im Zusammenspiel mit einer Rolle verstanden.This object is achieved by the invention according to the method in that in the tensile metal under tension substantially flat metal strip between the at least two roles, the internal tensile stresses acting in the metal strip are made visually visible and the tensile stresses or tensile stresses thus determined are utilized in the production of the metal strip. As roles here are also understood the existing work rolls in interaction with a role.
Im Unterschied zu vorbekannten Lösungen wird also das Metallband bei nicht optisch Vermessen, vielmehr werden die optisch sichtbaren Zugspannungen im Metallband vermessen und bei der Beurteilung der Bandqualität und ggf. der Steuerung bzw. Regelung des Herstellprozesses verwendet. Dabei werden also Unplanheiten des Bandes durch unterschiedliche Spannungszustände im Band erfasst und insoweit die Unplanheiten indirekt über die Spannungen beurteilt.In contrast to previously known solutions, therefore, the metal strip is measured optically not, but the optically visible tensile stresses are measured in the metal strip and used in the assessment of strip quality and possibly the control or regulation of the manufacturing process. Thus, unevenness of the band is detected by different states of tension in the band and insofar as the unevenness is assessed indirectly via the voltages.
Eine Fortbildung sieht vor, dass der auf das Metallband ausgeübte Bandzug in Abhängigkeit der ermittelten Zugspannungen im Metallband gewählt wird. Da- bei wird bevorzugt so vorgegangen, dass bei steigender Zugspannung im Metallband der auf das Metallband ausgeübte Bandzug erhöht wird. Mittels Zuordnung einer höheren oder einer niedrigeren Einzelspannung kann also ein direkter Eingriff in den Regelkreislauf zur Planheitsbeeinflussung erfolgen.A further training provides that the strip tension exerted on the metal strip is selected as a function of the determined tensile stresses in the metal strip. In this case, it is preferred to proceed in such a way that, with increasing tensile stress in the metal strip, the strip tension exerted on the metal strip is increased. By assigning a higher or a lower individual voltage can thus be a direct intervention in the control circuit for planarity control.
Das Metallband wird dabei bevorzugt mit einer Lichtquelle bestrahlt und mit zwei Kameras aus zwei unterschiedlichen Richtungen aufgenommen.The metal strip is preferably irradiated with a light source and recorded with two cameras from two different directions.
Die im Metallband wirkenden Zugspannungen, die mit dem genannten Vorgehen ermittelt werden können, werden bevorzugt mehrfach in kurzen zeitlichen Abständen ermittelt. Die Veränderung der im Metallband wirkenden Zugspannungen können durch den Vergleich einer Anzahl von in zeitlichem Abstand ermittelten Zugspannungen festgestellt werden. Mittels einer Vielzahl aufeinander folgender Bilde innerhalb kurzer Zeit lassen sich also Spannungsbilder auch für schnell bewegte Bänder darstellen.The tensile stresses acting in the metal band, which can be determined with the mentioned procedure, are preferably determined several times at short time intervals. The change in the tensile stresses acting in the metal strip can be achieved by comparing a number of in time determined tensile stresses are detected. By means of a large number of consecutive pictures within a short time, tension pictures can also be displayed for fast moving tapes.
Die Vorrichtung zur Herstellung eines Metallbandes hat eine Anzahl Rollen, ü- ber die das Metallband unter einer solchen Bandspannung geführt und in eine Förderrichtung bewegt wird, dass es zumindest zwischen zwei Rollen weitgehend eben ist. Erfindungsgemäß ist vorgesehen, dass zwischen zwei Rollen mindestens eine das Metallband beleuchtende Lichtquelle angeordnet ist und dass im Bereich der Lichtquelle mindestens eine, vorzugsweise zwei, Kameras angeordnet sind, die das beleuchtete Metallband aufnehmen, wobei das System bestehend aus Lichtquelle und Kamera bzw. Kameras zur Ermittlung der im Metallband wirkenden Zugspannungen geeignet ist.The device for producing a metal strip has a number of rollers, over which the metal strip is guided under such a belt tension and moved in a conveying direction, that it is largely flat at least between two rollers. According to the invention, at least one light source illuminating the metal strip is arranged between two rollers and at least one, preferably two, cameras are arranged in the area of the light source, which record the illuminated metal strip, the system consisting of light source and camera or cameras Determining the tensile stresses acting in the metal strip is suitable.
Dabei sind bevorzugt zwei Kameras vorhanden, die voneinander beabstandet angeordnet sind, so dass sie das Metallband aus zwei unterschiedlichen Richtungen aus aufnehmen. Die Kameras sind vorzugsweise digitaler Bauart.In this case, two cameras are preferably present, which are arranged at a distance from one another, so that they receive the metal strip from two different directions. The cameras are preferably of digital design.
Ferner können Aufnahmemittel vorhanden sein, die das von der Kamera oder den Kameras aufgenommene Bild in kurzen zeitlichen Abständen abspeichern.Furthermore, recording means may be present which store the image taken by the camera or the cameras at short time intervals.
Schließlich kann vorgesehen werden, dass die Aufnahmemittel mit Auswertemitteln in Verbindung stehen, die zum Vergleich der von der Kamera oder den Kameras aufgenommenen Bildern geeignet sind.Finally, provision can be made for the recording means to be connected to evaluation means which are suitable for comparing the images recorded by the camera or the cameras.
Mit der vorgeschlagenen Vorgehensweise ist es möglich, das Metallband nach dem Walzen unter relativ hoher Spannung und damit weitgehend eben zu führen und dennoch feststellen zu können, wie es um die Unebenheit des Bandes - bei Wegnahme der hohen Spannung im Band - bestellt ist. Die ermittelten Zugspannungen geben einen guten Hinweis auf die Qualität des gefertigten Bandes, so dass im gegebenen Falle auf die Fertigungsparameter Einfluss genommen werden kann. Weitere Merkmale und Einzelheiten der Erfindung ergeben sich aus den Ansprüchen und der Beschreibung eines in der Zeichnung dargestellten Ausführungsbeispiels der Erfindung. Die einzige Figur zeigt die Seitenansicht einer Walzvorrichtung für die Herstellung eines Metallbandes.With the proposed approach, it is possible to perform the metal strip after rolling under relatively high tension and thus largely flat and still be able to determine how it is ordered to the unevenness of the band - when removing the high voltage in the band. The determined tensile stresses give a good indication of the quality of the manufactured strip, so that in the given case the manufacturing parameters can be influenced. Further features and details of the invention will become apparent from the claims and the description of an embodiment of the invention shown in the drawing. The single figure shows the side view of a rolling device for the production of a metal strip.
Das Metallband 1 wird im linken Bereich der Figur in einem Walzbereich von zwei Arbeitswalzen 11 und 12 gewalzt, die von zwei Stützwalzen 13 und 14 gestützt werden. Das Metallband 1 wird dann in eine Förderrichtung F mit vorgegebener Fördergeschwindigkeit gefördert, wobei es unter einer definierten Bandspannung S gehalten wird. Die Bandspannung S wird dadurch aufrecht erhalten, dass das Metallband 1 in der skizzierte Weise geführt wird, d. h. es wird insbesondere - auf der rechten Seite der Figur - mittels zwei Rollen 4 und 5 S-förmig geführt, so dass ein gewünschtes Niveau an Bandspannung S zwischen den Walzen 11 , 12 und den Rollen 4, 5 aufrecht erhalten werden kann.The metal strip 1 is rolled in the left portion of the figure in a rolling range of two work rolls 11 and 12, which are supported by two back-up rolls 13 and 14. The metal strip 1 is then conveyed in a conveying direction F at a predetermined conveying speed, wherein it is kept below a defined belt tension S. The belt tension S is maintained by guiding the metal belt 1 in the manner outlined, i. H. it is in particular - on the right side of the figure - guided by two rollers 4 and 5 S-shaped, so that a desired level of belt tension S between the rollers 11, 12 and the rollers 4, 5 can be maintained.
Aufgrund der Bandspannung S weist das Metallband 1 einen hohen Planheitsgrad auf, d. h. die Oberflächenunebenheiten sind gering.Due to the belt tension S, the metal strip 1 has a high degree of flatness, d. H. the surface irregularities are low.
Zwischen zwei Rollen 2 und 3 wird das Metallband 1 daher weitgehend eben geführt. Dort ist eine Lichtquelle 6 angeordnet, mit der die Oberfläche des Metallbandes 1 beleuchtet werden kann. Weiterhin sind zwei Kameras 7 und 8 an zwei verschiedenen Orten angebracht, die von der Bandoberfläche zwei Bilder aufnehmen können.Between two rollers 2 and 3, the metal strip 1 is therefore guided largely flat. There, a light source 6 is arranged, with which the surface of the metal strip 1 can be illuminated. Furthermore, two cameras 7 and 8 are mounted in two different locations, which can take two pictures from the tape surface.
Das aus der Lichtquelle 6 und den Kameras 7 und 8 bestehende System, das für die Durchführung der erfindungsgemäßen Vorgehensweise tauglich ist, ist beispielsweise unter der Bezeichnung Q-400 als Digital 3D-Correlation System der Firma DANTEC Ettemeyer GmbH, Elchingen, Deutschland, (www.dantec- ettemeyer.com) bekannt und erhältlich. Das verfügbare System eignet sich gut, um innere Spannungen im weitgehend ebenen Metallband sichtbar zu machen und auszuwerten, auch wenn hierzu Bandzugschwankungen in geringem Maß notwendig werden sollten.The system consisting of the light source 6 and the cameras 7 and 8, which is suitable for carrying out the procedure according to the invention, is known, for example, under the name Q-400 as Digital 3D Correlation System from DANTEC Ettemeyer GmbH, Elchingen, Germany (www .dantec- ettemeyer.com) are known and available. The available system is well suited to visualize internal stresses in the largely flat metal strip and evaluate, even if this Bandzugschwankungen should be necessary to a small extent.
Die Kameras 7, 8 stehen mit einem Aufnahmemittel 9 in Verbindung, das dazu in der Lage ist, eine Vielzahl von Aufnahmen in kurzer Zeit abzuspeichern. Die aufgenommenen Bilder können in einem sich anschließenden Auswertemittel 10 ausgewertet werden, wobei es insbesondere möglich ist, die Verteilung der Zugspannungen im Metallband 1 sowie deren zeitliche Veränderung zu beobachten. In Abhängigkeit hiervon kann auf den Herstellungsprozess für das Metallband 1 Einfluss genommen werden.The cameras 7, 8 are connected to a recording means 9 which is capable of storing a plurality of recordings in a short time. The recorded images can be evaluated in a subsequent evaluation means 10, it being possible in particular to observe the distribution of the tensile stresses in the metal strip 1 and their temporal change. Depending on this, the manufacturing process for the metal strip 1 can be influenced.
Bevorzugt wird im Metallband 1 bei der Messung der Spannungen ein Bandzug aufrecht erhalten, der mindestens 10 % der Streckgrenze des Materials des Metallbandes entspricht.Preferably, a strip tension is maintained in the metal strip 1 in the measurement of the voltages, which corresponds to at least 10% of the yield strength of the material of the metal strip.
Die Verwendung der ermittelten Spannungen oder Spannungsdifferenzen im Metallband 1 bei der Herstellung des Metallbandes 1 kann bereits darin bestehen, dass die Spannungen im Band beobachtet werden und nur im Bedarfsfall, d. h. wenn Spannungsverteilungsverhältnisse im Band einen unzulässigen Wert überschreiten, Maßnahmen ergriffen werden.The use of the determined voltages or voltage differences in the metal strip 1 in the manufacture of the metal strip 1 may already consist in that the stresses are observed in the strip and only in case of need, d. H. If voltage distribution ratios in the band exceed an impermissible value, measures are taken.
Es kann aber auch vorgesehen werden, dass die ermittelten Werte im geschlossenen Regelkreis direkt in den Herstellungsprozess des Metallbandes eingesteuert werden. However, it can also be provided that the values determined are controlled in the closed loop directly in the production process of the metal strip.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
1 Metallband1 metal band
2 Rolle2 roll
3 Rolle3 roll
4 Rolle4 roll
5 Rolle5 roll
6 Lichtquelle6 light source
7 Kamera7 camera
8 Kamera8 camera
9 Aufnahmemittel9 receiving means
10 Auswertemittel10 evaluation means
11 Arbeitswalze11 stripper
12 Arbeitswalze12 stripper
13 Stützwalze13 back-up roll
14 Stützwalze14 back-up roll
S BandspannungS tape tension
F Förderrichtung F conveying direction

Claims

Patentansprüche: claims:
1. Verfahren zur Herstellung eines Metallbandes (1 ), bei dem das Metallband (1 ) über eine Anzahl Rollen (2, 3, 4, 5) unter einer solchen Bandspannung (S) geführt und in eine Förderrichtung (F) bewegt wird, dass es zumindest zwischen zwei Rollen (2, 3) weitgehend eben ist, dadurch gekennzeichnet, dass in dem unter Zugspannung weitgehend ebenen Metallband (1 ) zwischen den mindestens zwei Rollen (2, 3) die im Metallband (1 ) wirkenden inneren Zugspannungen optisch sichtbar gemacht werden und die ermittelten Zugspannungen oder Zugspannungsdifferenzen bei der Herstellung des Metallbandes (1 ) verwertet werden.1. A method for producing a metal strip (1), wherein the metal strip (1) over a number of rollers (2, 3, 4, 5) guided under such a belt tension (S) and in a conveying direction (F) is moved it is largely flat at least between two rollers (2, 3), characterized in that in the metal strip (1), which is substantially flat under tension, between the at least two rollers (2, 3), the internal tensile stresses acting in the metal band (1) are optically visible be used and the determined tensile stresses or tension differences in the production of the metal strip (1).
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass der auf das Metallband (1 ) ausgeübte Bandzug (S) in Abhängigkeit der ermittelten Zugspannungen im Metallband (1 ) gewählt wird.2. The method according to claim 1, characterized in that on the metal strip (1) applied strip tension (S) is selected in dependence of the determined tensile stresses in the metal strip (1).
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass bei steigender Zugspannung im Metallband (1 ) der auf das Metallband (1 ) ausgeübte Bandzug (S) erhöht wird.3. The method according to claim 2, characterized in that with increasing tensile stress in the metal strip (1) on the metal strip (1) applied strip tension (S) is increased.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Metallband (1) mit einer Lichtquelle (6) bestrahlt und mit zwei Kameras (7, 8) aus zwei unterschiedlichen Richtung aufgenommen wird.4. The method according to any one of claims 1 to 3, characterized the metal strip (1) is irradiated with a light source (6) and recorded with two cameras (7, 8) from two different directions.
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die im Metallband (1 ) wirkenden Zugspannungen mehrfach in kurzen zeitlichen Abständen ermittelt werden.5. The method according to any one of claims 1 to 4, characterized in that in the metal strip (1) acting tensile stresses are determined several times in short time intervals.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, dass die Veränderung der im Metallband (1 ) wirkenden Zugspannungen durch Vergleich einer Anzahl von in zeitlichem Abstand ermittelten Zugspannungen ermittelt wird.6. The method according to claim 5, characterized in that the change in the metal strip (1) acting tensile stresses by comparing a number of determined at a time interval tensile stresses is determined.
7. Vorrichtung zur Herstellung eines Metallbandes (1 ), mit einer Anzahl Rollen (2, 3, 4, 5), über die das Metallband (1 ) unter einer solchen Bandspannung (S) geführt und in eine Förderrichtung (F) bewegt wird, dass es zu- mindest zwischen zwei Rollen (2, 3) weitgehend eben ist, insbesondere zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass zwischen zwei Rollen (2, 3) mindestens eine das Metallband (1 ) beleuchtende Lichtquelle (6) angeordnet ist und dass im Bereich der Licht- quelle (6) mindestens eine, vorzugsweise zwei, Kameras (7, 8) angeordnet ist bzw. sind, die das beleuchtete Metallband (1 ) aufnehmen, wobei das System bestehend aus Lichtquelle (6) und Kamera bzw. Kameras (7, 8) zur Ermittlung der im Metallband (1 ) wirkenden Zugspannungen geeignet ist. 7. Apparatus for producing a metal strip (1), having a number of rollers (2, 3, 4, 5), via which the metal strip (1) is guided under such a strip tension (S) and moved in a conveying direction (F), that it is at least substantially flat between two rollers (2, 3), in particular for carrying out the method according to one of claims 1 to 6, characterized in that between two rollers (2, 3) at least one illuminating the metal strip (1) At least one, preferably two, cameras (7, 8) is arranged or are in the region of the light source (6), which receive the illuminated metal strip (1), the system consisting of light source (6) and camera or cameras (7, 8) for determining the tensile stress acting in the metal strip (1) is suitable.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass zwei Kameras (7, 8) vorhanden sind, die voneinander beabstandet angeordnet sind, so dass sie das Metallband (1 ) aus zwei unterschiedlichen Richtungen aus aufnehmen.8. Apparatus according to claim 7, characterized in that two cameras (7, 8) are provided, which are arranged spaced from each other, so that they receive the metal strip (1) from two different directions.
9. Vorrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass Aufnahmemittel (9) vorhanden sind, die das von der Kamera oder den Kameras (7, 8) aufgenommene Bild in kurzen zeitlichen Abständen abspeichern.9. Apparatus according to claim 7 or 8, characterized in that recording means (9) are present, which store the image taken by the camera or the cameras (7, 8) at short time intervals.
10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass Aufnahmemittel (9) mit Auswertemittel (10) in Verbindung stehen, die zum Vergleich der von der Kamera oder den Kameras (7, 8) aufgenommenen Bilder geeignet sind. 10. The device according to claim 9, characterized in that recording means (9) with evaluation means (10) are in communication, which are suitable for comparing the of the camera or the cameras (7, 8) recorded images.
EP06753734A 2005-05-20 2006-05-19 Method and apparatus for manufacturing a metal strip Not-in-force EP1899086B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005023270A DE102005023270A1 (en) 2005-05-20 2005-05-20 Method and device for producing a metal strip
PCT/EP2006/004753 WO2006122817A1 (en) 2005-05-20 2006-05-19 Method and apparatus for manufacturing a metal strip

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EP1899086A1 true EP1899086A1 (en) 2008-03-19
EP1899086B1 EP1899086B1 (en) 2009-08-26

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US (2) US7971461B2 (en)
EP (1) EP1899086B1 (en)
JP (1) JP2008541074A (en)
CN (1) CN101287558B (en)
AT (1) ATE440682T1 (en)
BR (1) BRPI0608296A2 (en)
CA (1) CA2598921C (en)
DE (2) DE102005023270A1 (en)
ES (1) ES2328956T3 (en)
RU (1) RU2364455C2 (en)
UA (1) UA90295C2 (en)
WO (1) WO2006122817A1 (en)

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ATE440682T1 (en) 2009-09-15
DE102005023270A1 (en) 2006-11-23
US20110252848A1 (en) 2011-10-20
CN101287558B (en) 2010-05-26
EP1899086B1 (en) 2009-08-26
RU2364455C2 (en) 2009-08-20
US20080125298A1 (en) 2008-05-29
BRPI0608296A2 (en) 2009-12-08
UA90295C2 (en) 2010-04-26
ES2328956T3 (en) 2009-11-19
US7971461B2 (en) 2011-07-05
WO2006122817A1 (en) 2006-11-23
CA2598921C (en) 2014-03-18
CA2598921A1 (en) 2006-11-23
CN101287558A (en) 2008-10-15
JP2008541074A (en) 2008-11-20
DE502006004671D1 (en) 2009-10-08
RU2007129432A (en) 2009-02-10

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