EP0867241B1 - Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor - Google Patents

Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor Download PDF

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Publication number
EP0867241B1
EP0867241B1 EP98112117A EP98112117A EP0867241B1 EP 0867241 B1 EP0867241 B1 EP 0867241B1 EP 98112117 A EP98112117 A EP 98112117A EP 98112117 A EP98112117 A EP 98112117A EP 0867241 B1 EP0867241 B1 EP 0867241B1
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EP
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Prior art keywords
strip
straightening
measuring
rolls
tension
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German (de)
French (fr)
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EP0867241A3 (en
EP0867241A2 (en
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Noé Dipl.-Ing. Rolf
Andreas Dr. Dipl-Ing. Noé
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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BWG Bergwerk und Walzwerk Maschinenbau GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling

Definitions

  • the invention relates to a method for continuous Straightening thin metal strips, in particular Aluminum and stainless steel strips with strip thicknesses of 0.1 mm up to 0.5 mm, in a belt process line, after which belt unevenness and / or the strip profile measured before straightening and then depending on the measured values determined at least one directional parameter is regulated in advance.
  • the invention is based on the technical problem Processes of the type described at the beginning so on form that the metal strips flawlessly and continuously be addressed, taking into account limited Values for the target parameters.
  • the invention proposes to solve this technical problem in a generic method before that as Guideline parameters of the strip tension taking into account stored Guide values for different metal strips immediately before winding the metal strip in question continuously pre-regulated via the rewinder becomes.
  • the invention is based on the knowledge that the judging result essentially of influencing factors, such as the Strip flatness and the strip profile, depending on the leveling is. If these influencing factors are determined, the Straightening process by varying the strip tension immediately before optimized the winding of the metal strip in question become. In this context it is also important that usually the degree of stretch can be minimized to the Material properties of the metal strip in question to influence as little as possible and still the same Get judge result. Unplannedness is always in the Infeed area of the metal strip in question by measurement detected, so that then the directional parameter or parameters in the way a forward control continuously and optimally set can be.
  • influencing factors such as the Strip flatness and the strip profile, depending on the leveling is.
  • the optimal guideline values once in a test field with subsequent off-line flatness measurement and then save.
  • aluminum coils used in the Rule on the outside diameter of the center bowls and on the inside diameter Have edge waves over the entire Coil length can be optimally directed.
  • the second influencing variable, the band profile can be carried out online a traversing thickness gauge can be measured.
  • the Setting values of the corresponding straightening system can thus can also be optimized, but the influence of Belt profile during the straightening process not as large as that of band unevenness. But for that it is important that Adjust the tape tension on the rewinder depending on the tape profile. For example, a band profile with a large one Excessive thickness in the area of the strip center after straightening in the wound coil due to and from compressive stresses resulting crawls to center bowls. consequently the flatness is negatively influenced after straightening and is often lost.
  • the deflection of the stretch bending rollers may be realized in this way be like this basically in the German patent 33 23 623 is described. This is done in particular with Look at the figures 13 and 14 there a deflection with the help of hydraulic cylinders or by split Pinch rollers as pressure elements.
  • the measuring device for the distance measurement can be designed as a shapemeter roll or as a laser beam measuring device with measuring beams arranged perpendicular to the metal strip passing through and across its bandwidth in a predetermined distribution.
  • the entire measuring station is preferably in an area of low strip tension and consequently in front of the brake roller set in order to obtain significant measured values.
  • Low strip tension means a range of ⁇ 15 N / mm 2 for aluminum strips and ⁇ 50 N / mm 2 for stainless steel strips.
  • the traversing strip thickness measuring device is connected to the control device, which regulates the unwinder in advance in order to achieve optimum strip tension.
  • the straightening system shown is used for straightening thin ones Metal strips 1, in particular aluminum strips and Stainless steel strips with strip thicknesses from 0.1 mm to 0.5 mm.
  • This straightening system has a pull roller set 2 and one Brake roller set 3 on.
  • the brake roller set 3 is a measuring station 4 with at least one measuring device 5 for distance measurement perpendicular to the relevant metal strip 1 and above the bandwidth precedes.
  • Between the brake roller set 3 and the tension roller set 2 is a stretch roller set 6 with a brake roller 7 and a tension or correction roller 8 with concave and convex adjustable crown.
  • Behind the stretching roller set can are still a regulated tension measuring roller 10, which one Stretch bending device 11 follows.
  • the stretch bending device 11 has stretch bending rollers 12.
  • To the Pull roller set 2 is followed by a rewinder 13.
  • To the Measuring device 5 is a control device 14 for at least the Stretching roller set 6, which is adjustable in terms of crowning Tension or correction roller 8, the tension measuring roller 10 and the stretch bending rollers 12 connected.
  • band unevenness can be continuously measure and the measurement results in real time to the Pass on control device 14 so that by way of a Advance regulation always an optimal setting of the Straightening parameters and consequently the straightening units is guaranteed so that a continuous Tape error correction is achieved online. Furthermore, an optimal adjustment of the tape tension before Rewinder 13 reach, namely when the measuring station 4 a Belt thickness measuring device traversing the bandwidth has and directly over the rewinder 13 of the tape tension is regulated ahead of the rewinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Description

Die Erfindung betrifft ein Verfahren zum kontinuierlichen Richten von dünnen Metallbändern, insbesondere von Aluminium- und Edelstahlbändern mit Banddicken von 0,1 mm bis 0,5 mm, in einer Bandprozeßlinie, wonach Bandunplanheiten und/oder das Bandprofil vor dem Richten gemessen werden, und wonach in Abhängigkeit von den ermittelten Meßwerten zumindest ein Richtparameter vorausgeregelt wird.The invention relates to a method for continuous Straightening thin metal strips, in particular Aluminum and stainless steel strips with strip thicknesses of 0.1 mm up to 0.5 mm, in a belt process line, after which belt unevenness and / or the strip profile measured before straightening and then depending on the measured values determined at least one directional parameter is regulated in advance.

Dünne Metallbänder, zum Beispiel Lithographiebänder aus Aluminium oder blankgeglühte Edelstahlbänder, müssen nach dem heutigen Standard immer höhere Anforderungen an die Bandplanheit bei höchster Qualität der Bandoberfläche erfüllen. Als Verfahren zum Richten solcher Metallbänder sind im wesentlichen das Zugrecken und das Streckbiegerichten bekannt, die stets weiterentwickelt worden sind, um den vorerwähnten Anforderungen gerecht zu werden. In diesem Zusammenhang sind insbesondere das Zugrecken mit einem zwischengeschalteten Zugreckrollenpaar (DE 39 12 676), der Einsatz einer konkav-konvexen Zugrolle (DE 42 30 243) und die sog. Coilsetregelung (DE 43 23 385) zu nennen.

  • Mit diesen Richtverfahren kann die Planlage in zunehmendem Maße bis hin zu < 1 I-Unit verbessert werden. Es entspricht 1 I-Un der Meßgenauigkeit von 10 µm/m für Längenunterschiede im Metallband. Jedoch besteht beim Richten dünner Metallbänder ein besonderes Problem darin, daß die Planlage nicht kontinuierlich on-line nach dem Richten gemessen werden kann, da das betreffende Metallband in der Bandprozeßlinie aufgrund des Bandzuges optisch plan erscheint. Auch Meßeinrichtungen, welche die Bandzugverteilung über die Bandbreite messen und daraus Rückschlüsse auf die Planlage ermöglichen - sogenannte Shapemeter-Rollen - können in diesen Fällen nicht eingesetzt werden, da die Meßgenauigkeit von ca. ± 2 - 5 I-Units nicht ausreicht, um Restwelligkeiten in der Größenordnung von unter 1 I-Unit zu erfassen. Folglich muß von einem gerichteten Coil stets ein Probestück abgetrennt und off-line auf einem Planlagemeßtisch vermessen werden. Die Genauigkeit dieser Meßtische, bei denen die Probetafel zum Beispiel mit einem Laserstrahlmeßgerät vermessen wird, beträgt ca. 0,1 I-Unit.
  • Festigkeitsschwankungen in den Metallbändern lassen sich nicht erfassen und führen weiterhin zu Schwankungen im Richtergebnis. Dickenschwankungen liegen in der Regel bei < 2 % und haben nur untergeordneten Einfluß auf das Richtergebnis. Folglich bleiben zwei Haupteinflußgrößen übrig, nämlich die Unplanheit vor dem Richten und das Bandprofil.
Thin metal strips, for example lithography strips made of aluminum or bright annealed stainless steel strips, have to meet ever higher demands on strip flatness with the highest quality of the strip surface according to today's standard. As a method for straightening such metal strips, tensile stretching and stretch-bending straightening are known, which have always been further developed to meet the aforementioned requirements. In this context, the stretching with an interposed pair of drawing stretching rollers (DE 39 12 676), the use of a concave-convex drawing roller (DE 42 30 243) and the so-called coil set control (DE 43 23 385) should be mentioned in particular.
  • With this straightening process, the flatness can be improved to an increasing extent up to <1 I-Unit. It corresponds to 1 I-Un of the measuring accuracy of 10 µm / m for length differences in the metal strip. However, there is a particular problem with straightening thin metal strips that the flatness cannot be measured continuously on-line after straightening, since the metal strip in question appears optically flat in the strip process line due to the strip tension. Even measuring devices that measure the strip tension distribution over the strip width and from this allow conclusions to be drawn about the flatness - so-called shapemeter rolls - cannot be used in these cases, since the measuring accuracy of approx. ± 2 - 5 I-Units is not sufficient to prevent residual ripples in on the order of less than 1 I-Unit. Consequently, a test piece must always be separated from a directed coil and measured off-line on a flat position measuring table. The accuracy of these measuring tables, on which the sample panel is measured, for example with a laser beam measuring device, is approx. 0.1 I-unit.
  • Fluctuations in strength in the metal strips cannot be recorded and continue to lead to fluctuations in the judging result. Thickness fluctuations are usually <2% and have only a minor influence on the judging result. As a result, two major influencing variables remain, namely the unevenness before straightening and the belt profile.

Um ein Streckbiegerichten mit jeweils an die zu richtenden Unplanheiten angepaßtem Streckgrad sicherzustellen, wird bei einem Verfahren der eingangs beschriebenen Ausführungsart vor einem einlaufseitigen Spannrollensatz ein Istwertgeber für die Amplituden von Bandwellen des durchlaufenden Metallbandes angeordnet. Aus der ermittelten Wellenamplitude wird in einem an den Istwertgeber angeschlossenen Rechner die für diese Amplitude erforderliche Mindeststreckgradgröße errechnet und als Sollwert einer Regelungseinrichtung für den über den Bandzug zwischen den beiden Spannrollensätzen steuerbaren Streckgrad zugeführt. Folglich wird bei dem bekannten Verfahren einzig der Bandzug bzw. Streckgrad als Richtparameter beeinflußt. Zusätzlich ist nach einem auslaufseitigem Spannrollensatz ein an einen Regler für einen Richtrollenstelltrieb angeschlossener Istwertgeber angeordnet. Sofern über den nach dem auslaufseitigem Spannrollensatz angeordneten Istwertgeber eine Querkrümmung des durchlaufenden Metallbandes festgestellt wird, erfolgt eine Verstellung des Stelltriebes über den Regler so lange, bis die Querkrümmung verschwunden ist. Folglich handelt es sich diesbezüglich um eine klassische (Nach-) Regelung, jedenfalls keine Vorwärts- bzw. Vorrausregelung (vgl. EP-A- 0 012 738).In order to straighten a bending with each one to be addressed Ensuring unevenness of the adjusted degree of stretch will in a method of the type described above an actual value transmitter in front of a tensioner roller set on the inlet side for the amplitudes of bandwaves of the passing Metal tape arranged. From the determined wave amplitude is connected in a to the actual value transmitter Calculator the minimum stretch size required for this amplitude calculated and as the setpoint of a control device for the one about the belt tension between the two Tensioner roller sets supplied controllable degree of stretch. Consequently, in the known method, only the tape tension or degree of stretch as a guideline parameter. additionally is after a set of idlers on the outlet side connected to a controller for a straightening roller actuator Actual value generator arranged. If over the after the actual value transmitter arranged on the outlet tensioning roller set a transverse curvature of the continuous metal strip the actuator is adjusted over the controller until the transverse curvature has disappeared is. Consequently, it is in this regard a classic (post) regulation, at least no forward or advance regulation (cf. EP-A-0 012 738).

Darüber hinaus wird in dem Aufsatz "das Streckbiegerichten und sein Einfluß auf die Eigenschaften von gewalzten Edelstahl-Kaltbändern" (Stahl und Eisen 114 (1994), Seiten 91 ff.) eine Streckbiegerichtanlage erwähnt, bei welcher die Beurteilung der Unplanheiten und die Regulierung von Richtparametern manuell erfolgt. Zwar wird die zukünftige Bewältigung derartiger Aufgaben durch ein Meß- und Regelsystem angesprochen, wie dies im einzelnen erfolgen soll, bleibt jedoch offen. In addition, in the essay "stretch bending straightening and its influence on the properties of rolled stainless steel cold strips " (Stahl and Eisen 114 (1994), pages 91 ff.) mentioned a stretch bending straightening system in which the Assessment of unplannedness and regulation of benchmarks done manually. The future Mastering such tasks with a measuring and control system addressed how this should be done in detail, remains open, however.

Schließlich wird im Stand der Technik ein Verfahren zum Richten von Metallbändern beschrieben, bei welchem Korrekturrollen in Abhängigkeit des Bandprofils verstellt werden (vgl. Patent Abstracts of Japan, Volumen 009, Nr. 046; JP-A-59185524).Finally, a method for Straightening of metal strips described in which Correction rollers adjusted depending on the belt profile (see Patent Abstracts of Japan, volume 009, No. 046; JP-A-59185524).

Der Erfindung liegt das technische Problem zugrunde, ein Verfahren der eingangs beschriebenen Art so weiter zu bilden, daß die Metallbänder einwandfrei und kontinuierlich gerichtet werden, und zwar unter Berücksichtigung eingegrenzter Werte für die Richtparameter.The invention is based on the technical problem Processes of the type described at the beginning so on form that the metal strips flawlessly and continuously be addressed, taking into account limited Values for the target parameters.

Zur Lösung dieses technischen Problems schlägt die Erfindung bei einem gattungsgemäßen Verfahren vor, daß als Richtparameter der Bandzug unter Berücksichtigung abgespeicherter Richtwerte für unterschiedliche Metallbänder unmittelbar vor dem Aufwickeln des betreffenden Metallbandes über den Aufwickler kontinuierlich vorausgeregelt wird.The invention proposes to solve this technical problem in a generic method before that as Guideline parameters of the strip tension taking into account stored Guide values for different metal strips immediately before winding the metal strip in question continuously pre-regulated via the rewinder becomes.

Die Erfindung geht von der Erkenntnis aus, daß das Richtergebnis im wesentlichen von Einflußgrößen, wie der Bandunplanheit und dem Bandprofil, vor dem Richten abhängig ist. Wenn diese Einflußgrößen ermittelt werden, kann der Richtprozeß durch Variation des Bandzuges unmittelbar vor dem Aufwickeln des betreffenden Metallbandes optimiert werden. In diesem Zusammenhang ist auch von Bedeutung, daß in der Regel der Streckgrad minimiert werden kann, um die Werkstoffeingeschaften des betreffenden Metallbandes möglichst gering zu beeinflussen und dennoch das gleiche Richtergebnis zu erhalten. Stets wird die Unplanheit im Einlaufbereich des betreffenden Metallbandes meßtechnisch erfaßt, so daß dann der oder die Richtparameter im Wege einer Vorwärtsregelung kontinuierlich und optimal eingestellt werden können.The invention is based on the knowledge that the judging result essentially of influencing factors, such as the Strip flatness and the strip profile, depending on the leveling is. If these influencing factors are determined, the Straightening process by varying the strip tension immediately before optimized the winding of the metal strip in question become. In this context it is also important that usually the degree of stretch can be minimized to the Material properties of the metal strip in question to influence as little as possible and still the same Get judge result. Unplannedness is always in the Infeed area of the metal strip in question by measurement detected, so that then the directional parameter or parameters in the way a forward control continuously and optimally set can be.

Für die unterschiedlichen Metallbänder lassen sich die optimalen Richtwerte jeweils einmal in einem Versuchsfeld mit anschließender off-line Planlagemessung ermitteln und dann abspeichern. Wird der gleiche Bandtyp in der Bandprozeßlinie nochmals gefahren, stellt sich die betreffende Richtanlage automatisch auf die abgespeicherten Richtwerte ein und regelt die Einstellwerte während des Bandlaufs nach. So können zum Beispiel Aluminium-Coils, die in der Regel am Außendurchmesser Mittenschüsseln und am Innendurchmesser Randwellen aufweisen, über die gesamte Coillänge optimal gerichtet werden.For the different metal strips, the optimal guideline values once in a test field with subsequent off-line flatness measurement and then save. Will be the same belt type in the belt process line drove again, turns the concerned Straightening system automatically to the stored guide values and regulates the setting values while the tape is running to. For example, aluminum coils used in the Rule on the outside diameter of the center bowls and on the inside diameter Have edge waves over the entire Coil length can be optimally directed.

Die zweite Einflußgröße, das Bandprofil, kann on-line über ein traversierendes Dickenmeßgerät gemessen werden. Die Einstellwerte der entsprechenden Richtanlage können so ebenfalls optimiert werden, jedoch ist der Einfluß des Bandprofils während des Richtvorganges nicht so groß, wie der der Bandunplanheit. Dafür ist es jedoch wichtig, den Bandzug am Aufwickler in Abhängigkeit vom Bandprofil einzustellen. So führt zum Beispiel ein Bandprofil mit großer Dickenüberhöhung im Bereich der Bandmitte nach dem Richten im aufgewickelten Coil infolge Druckspannungen und daraus resultierender Kriechvorgänge zu Mittenschüsseln. Folglich wird die Planlage nach dem Richten negativ beeinflußt und geht häufig sogar verloren.The second influencing variable, the band profile, can be carried out online a traversing thickness gauge can be measured. The Setting values of the corresponding straightening system can thus can also be optimized, but the influence of Belt profile during the straightening process not as large as that of band unevenness. But for that it is important that Adjust the tape tension on the rewinder depending on the tape profile. For example, a band profile with a large one Excessive thickness in the area of the strip center after straightening in the wound coil due to and from compressive stresses resulting crawls to center bowls. consequently the flatness is negatively influenced after straightening and is often lost.

Gegenstand der Erfindung ist auch eine Richtanlage, die zur Durchführung des erfindungsgemäßen Verfahrens besonders geeignet ist und zumindest einen Zugrollensatz und einen Bremsrollensatz aufweist. Dem Bremsrollensatz ist eine Meßstation mit zumindest einem Meßgerät für Abstandsmessungen senkrecht zu dem betreffenden Metallband und über die Bandbreite vorgeordnet. Zusätzlich ist das Meßgerät an eine Regelvorrichtung angeschlossen. Die vorgenannte Richtanlage ist dadurch gekennzeichnet, dass zwischen dem Bremsrollensatz und dem Zugrollensatz

  • ein Streckrollensatz mit einer Bremsrolle und einer Zugrolle als Korrekturrolle mit konkav und konvex einstellbarer Balligkeit und
  • eine Streckbiegevorrichtung
angeordnet sind, dass ferner die Regelvorrichtung zur Einstellung der Richtparameter mit Hilfe zumindest des Streckrollensatzes, der hinsichtlich ihrer Balligkeit einstellbaren Korrekturrolle und der Streckbiegerollen der Streckbiegerichtvorrichtung eingerichtet ist, und dass die Messstation ein über die Bandbreite traversierendes Banddickenmessgerät aufweist, welches an die Regelvorrichtung zum Regeln eines Aufwicklers bzw. des Bandzuges unter Berücksichtigung abgespeicherter Richtwerte für unterschiedliche Metallbändern und der mittels der Messstation erfassten sowie in Echtzeit an die Regelvorrichtung weitergegebenen Messwerte unmittelbar vor dem Aufwickler angeschlossen ist.The invention also relates to a straightening system which is particularly suitable for carrying out the method according to the invention and has at least one pulling roller set and one braking roller set. The brake roller set is preceded by a measuring station with at least one measuring device for distance measurements perpendicular to the metal strip in question and across the strip width. In addition, the measuring device is connected to a control device. The aforementioned straightening system is characterized in that between the brake roller set and the pull roller set
  • a drawing roller set with a brake roller and a pull roller as a correction roller with concave and convex adjustable crowning and
  • a stretch bending device
are arranged that the control device for setting the straightening parameters is also set up with the aid of at least the stretching roller set, the correction roller, which can be set with respect to its crowning, and the stretching bending rollers of the stretching bending straightening device, and that the measuring station has a strip thickness measuring device that traverses the bandwidth, which is connected to the control device for regulating one Rewinder or the strip tension, taking into account stored reference values for different metal strips and the measurement values recorded by the measuring station and forwarded in real time to the control device, is connected directly in front of the rewinder.

Die Durchbiegung der Streckbiegerollen mag so verwirklicht sein, wie dies grundsätzlich in der deutschen Patenschrift 33 23 623 beschrieben ist. Hier erfolgt insbesondere mit Blick auf die dortigen Figuren 13 und 14 eine Durchbiegung mit Hilfe von Hydraulikzylindern oder durch aufgeteilte Andruckrollen als Andruckelemente.The deflection of the stretch bending rollers may be realized in this way be like this basically in the German patent 33 23 623 is described. This is done in particular with Look at the figures 13 and 14 there a deflection with the help of hydraulic cylinders or by split Pinch rollers as pressure elements.

Bei der zuvor beschriebenen Richtanlage kann das Meßgerät für die Abstandsmessung als eine Shapemeter-Rolle oder als ein Laserstrahlmeßgerät mit senkrecht zu dem durchlaufenden Metallband und über seine Bandbreite in vorgegebener Verteilung angeordneten Meßstrahlen ausgebildet sein. Die ganze Meßstation befindet sich bevorzugt in einem Bereich niedriger Bandzüge und folglich vor dem Bremsrollensatz, um signifikante Meßwerte zu erhalten. Niedrige Bandzüge meint einen Bereich von < 15 N/mm2 für Aluminiumbänder und < 50 N/mm2 für Edelstahlbänder. Das traversierende Banddickenmeßgerät ist - wie bereits beschrieben - an die Regelvorrichtung angeschlossen, welche den Abwickler zum Erzielen optimaler Bandzüge vorausregelt. In the straightening system described above, the measuring device for the distance measurement can be designed as a shapemeter roll or as a laser beam measuring device with measuring beams arranged perpendicular to the metal strip passing through and across its bandwidth in a predetermined distribution. The entire measuring station is preferably in an area of low strip tension and consequently in front of the brake roller set in order to obtain significant measured values. Low strip tension means a range of <15 N / mm 2 for aluminum strips and <50 N / mm 2 for stainless steel strips. As already described, the traversing strip thickness measuring device is connected to the control device, which regulates the unwinder in advance in order to achieve optimum strip tension.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Die einzige Figur zeigt eine erfindungsgemäße Richtanlage in schematischer Seitenansicht.In the following, the invention is based on only one Exemplary embodiment drawing closer explained. The only figure shows an inventive Straightening system in schematic side view.

Die dargestellte Richtanlage dient zum Richten von dünnen Metallbändern 1, insbesondere von Aluminium-Bändern und Edelstahlbändern mit Banddicken von 0,1 mm bis 0,5 mm. Diese Richtanlage weist einen Zugrollensatz 2 und einen Bremsrollensatz 3 auf. Dem Bremsrollensatz 3 ist eine Meßstation 4 mit zumindest einem Meßgerät 5 für Abstandsmessung senkrecht zu dem betreffenden Metallband 1 und über die Bandbreite vorgeordnet. Zwischen dem Bremsrollensatz 3 und dem Zugrollensatz 2 ist ein Streckrollensatz 6 mit einer Bremsrolle 7 und einer Zug- bzw. Korrekturrolle 8 mit konkav und konvex einstellbarer Balligkeit angeordnet. Zwischen der Bremsrolle und der Zugrolle 8 befindet sich ein Zugreckbereich 9. Hinter dem Streckrollensatz kann sich noch eine geregelte Zugmeßrolle 10 befinden, welcher eine Streckbiegevorrichtung 11 folgt. Die Streckbiegevorrichtung 11 weist Streckbiegerollen 12 auf. An den Zugrollensatz 2 schließt sich ein Aufwickler 13 an. An das Meßgerät 5 ist eine Regelvorrichtung 14 für zumindest den Streckrollensatz 6, die hinsichtlich ihrer Balligkeit einstellbare Zug- bzw. Korrekturrolle 8, die Zugmeßrolle 10 und die Streckbiegerrollen 12 angeschlossen.The straightening system shown is used for straightening thin ones Metal strips 1, in particular aluminum strips and Stainless steel strips with strip thicknesses from 0.1 mm to 0.5 mm. This straightening system has a pull roller set 2 and one Brake roller set 3 on. The brake roller set 3 is a measuring station 4 with at least one measuring device 5 for distance measurement perpendicular to the relevant metal strip 1 and above the bandwidth precedes. Between the brake roller set 3 and the tension roller set 2 is a stretch roller set 6 with a brake roller 7 and a tension or correction roller 8 with concave and convex adjustable crown. There is between the brake roller and the pull roller 8 a stretching area 9. Behind the stretching roller set can are still a regulated tension measuring roller 10, which one Stretch bending device 11 follows. The stretch bending device 11 has stretch bending rollers 12. To the Pull roller set 2 is followed by a rewinder 13. To the Measuring device 5 is a control device 14 for at least the Stretching roller set 6, which is adjustable in terms of crowning Tension or correction roller 8, the tension measuring roller 10 and the stretch bending rollers 12 connected.

Auf diese Weise lassen sich Bandunplanheiten kontinuierlich messen und die Meßergebnisse in Echtzeit an die Regelvorrichtung 14 weitergeben, so daß im Wege einer Voraus-Regelung stets eine optimale Einstellung der Richtparameter und folglich der Richtaggregate gewährleistet ist, so daß eine kontinuierliche Bandfehlerkorrektur on-line erreicht wird. Ferner läßt sich eine optimale Einstellung des Bandzuges vor dem Aufwickler 13 erreichen, wenn nämlich die Meßstation 4 ein über die Bandbreite traversierendes Banddickenmeßgerät aufweist und über den Aufwickler 13 der Bandzug unmittelbar vor dem Aufwickler vorausgeregelt wird.In this way, band unevenness can be continuously measure and the measurement results in real time to the Pass on control device 14 so that by way of a Advance regulation always an optimal setting of the Straightening parameters and consequently the straightening units is guaranteed so that a continuous Tape error correction is achieved online. Furthermore, an optimal adjustment of the tape tension before Rewinder 13 reach, namely when the measuring station 4 a Belt thickness measuring device traversing the bandwidth has and directly over the rewinder 13 of the tape tension is regulated ahead of the rewinder.

Claims (4)

  1. A method for the continuous straightening of thin metal strip (1), particularly aluminium and stainless steel strip having strip thicknesses of 0.1 mm to 0.5 mm, in a strip processing line, according to which regions of strip surface unevenness and/or the strip profile is/are measured before straightening, and according to which at least one straightening parameter is pre-set depending on the measured values determined, characterised in that the strip tension directly before the metal strip concerned is wound into a coil is continuously pre-set, via the coil winder (13), as a straightening parameter, taking into consideration stored straightening values for different metal strips.
  2. A straightening installation for carrying out the method according to claim 1, comprising at least one set of tension rolls (2) and one set of brake rolls (3), wherein a measuring station (4) comprising at least one measuring device (5) for measuring distance perpendicular to the metal strip (1) concerned and over the strip width is disposed upstream of the set of brake rolls (3), and wherein the measuring device (5) is connected to a controller (14), characterised in that
    a set of stretching rolls (6) comprising a brake roll (7), and comprising a tension roll (8) as a correction roll (8), the camber of which can be adjusted and made concave or convex, and
    a stretcher-and-roller levelling apparatus (11),
    are disposed between the set of brake rolls (3) and the set of tension rolls (2), that in addition
    the controller (14) is designed for adjusting the straightening parameters with the aid of at least the set of stretching rolls (6), of the correction roll (8) which is adjustable as regards its camber, and of the stretcher-and-roller levelling rolls (12) of the stretcher-and-roller levelling apparatus (11), and that
    the measuring station (4) comprises a strip thickness measuring device which traverses the strip width and which is connected to the controller (14) for controlling a coil winder (13) or the strip tension directly before the coil winder (13), taking into consideration stored straightness values for different metal strip (1) and the measured values which are determined by means of the measuring station (4) and which are transmitted in real time to the controller (14).
  3. A straightening installation according to claim 2, characterised in that the measuring device (5) for measuring distance is constructed as a shapemeter roll or as a laser beam measuring device comprising measuring beams which are disposed perpendicularly to the metal strip (1) passing through and which are disposed in a predetermined distribution over the strip width thereof.
  4. A straightening installation according to either one of claims 2 or 3, characterised in that the measuring station (4) is disposed in a region of low strip tension.
EP98112117A 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor Expired - Lifetime EP0867241B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19509067 1995-03-14
DE19509067A DE19509067A1 (en) 1995-03-14 1995-03-14 Process for the continuous straightening of thin metal strips, in particular aluminum and stainless steel strips with strip thicknesses of 0.1 mm to 0.5 mm, and straightening system for carrying out the method
EP95118599A EP0732160B1 (en) 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor

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EP95118599A Division EP0732160B1 (en) 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor

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EP0867241A2 EP0867241A2 (en) 1998-09-30
EP0867241A3 EP0867241A3 (en) 1998-10-21
EP0867241B1 true EP0867241B1 (en) 2003-04-02

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EP98112117A Expired - Lifetime EP0867241B1 (en) 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor
EP95118599A Expired - Lifetime EP0732160B1 (en) 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor

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EP95118599A Expired - Lifetime EP0732160B1 (en) 1995-03-14 1995-11-25 Method for straightening continuously thin metal strips, in particular strips made of aluminium and stainless steel with a thickness between 0,1 mm and 0,5 mm and straightening plant therefor

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US (3) US5704237A (en)
EP (2) EP0867241B1 (en)
DE (3) DE19509067A1 (en)

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Also Published As

Publication number Publication date
DE19509067A1 (en) 1996-09-19
DE59510627D1 (en) 2003-05-08
EP0732160B1 (en) 2001-08-16
US5829287A (en) 1998-11-03
EP0867241A3 (en) 1998-10-21
EP0867241A2 (en) 1998-09-30
EP0732160A3 (en) 1997-08-20
US5704237A (en) 1998-01-06
EP0732160A2 (en) 1996-09-18
DE59509514D1 (en) 2001-09-20
US5829286A (en) 1998-11-03

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