EP2195126A1 - Rolling device and method for the operation thereof - Google Patents

Rolling device and method for the operation thereof

Info

Publication number
EP2195126A1
EP2195126A1 EP08802476A EP08802476A EP2195126A1 EP 2195126 A1 EP2195126 A1 EP 2195126A1 EP 08802476 A EP08802476 A EP 08802476A EP 08802476 A EP08802476 A EP 08802476A EP 2195126 A1 EP2195126 A1 EP 2195126A1
Authority
EP
European Patent Office
Prior art keywords
rolling
flatness
rolling stock
nip
work rolls
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
EP08802476A
Other languages
German (de)
French (fr)
Other versions
EP2195126B1 (en
Inventor
Dietrich Mathweis
Hans-Peter Richter
Hartmut Pawelski
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 Siemag 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 Siemag AG filed Critical SMS Siemag AG
Publication of EP2195126A1 publication Critical patent/EP2195126A1/en
Application granted granted Critical
Publication of EP2195126B1 publication Critical patent/EP2195126B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls
    • 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
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/44—Control of flatness or profile during rolling of strip, sheets or plates using heating, lubricating or water-spray cooling of the product
    • 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
    • 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 rolling device according to the preamble of claim 1 and a method for its operation according to claim 5.
  • Rollers are well known in the art.
  • such rolling devices are known in which a pair of work rolls are acted upon by at least two opposite the work rolls larger support rollers for receiving the rolling forces.
  • the flatness of the rolling stock may vary, whereby a material backlog can arise immediately before the nip between the work rolls. If the material backlog can not be compensated in time and precisely enough, unevenness in the flatness of the rolled material will result, which leads to a loss in quality of the rolling stock and which may make the rolling stock completely unsuitable for some applications.
  • DE 27 43 130 discloses a rolling device with thickness measuring devices in front of and behind the nip, so that a predetermined thickness tolerance can be achieved. However, so that the effect of the material backlog can not be resolved, because the sensors in turn is located far away from the nip. In addition, localized thickness variation may be meaningful only in conjunction with an accurate profile reference. An unplanarity can not be sufficiently qualified.
  • the object is achieved with respect to the rolling device, by a rolling device according to the features of claim 1 with rolling device with at least two work rolls and a nip between the work rolls for performing and rolling a rolling stock, such as a belt preferably made of metal, and optionally an arrangement of Support rollers, further comprising at least one measuring device is provided for measuring a backlog of the rolling stock of the rolling stock in front of the nip, further wherein a control or regulating unit is provided, which actuates actuators for adjusting the flatness of the rolling stock due to the signals of the measuring device.
  • a flatness measuring device which likewise provides signals for the control or regulating unit, whereupon, in response to the signals of the measuring device and the flatness measuring device, the actuators for adjusting the flatness of the Walzguts drives.
  • an actuator for adjusting the flatness of the rolling stock comprises an actuator for adjusting the inclination of the work rolls and / or the intermediate rolls and / or the backup rolls, the bending of the work rolls and / or the intermediate rolls, and / or the backup rolls which is axial displacement of the work rolls and / or the intermediate rolls, for example in the context of a Continuously Variable Crown (CVC) shift, a minimum quantity lubrication and / or a temperature control or temperature control of the belt and / or the work rolls.
  • CVC Continuously Variable Crown
  • the at least one measuring device for measuring a backlog of the rolling material of the rolling stock in front of the roll gap is an optically or mechanically measuring measuring device.
  • the object with respect to the method is achieved by a method for operating a rolling device according to claim 5. The advantages of this method correspond to the advantages stated above with respect to the device.
  • the at least one measuring device for measuring a backlog of the rolling material of the rolling stock before the roll gap detects the backlog optically or mechanically.
  • Figure 1 is a schematic representation of a rolling device with measuring device.
  • a rolling device 1 shows schematically a rolling device 1 with two work rolls 2,3 between which a roll gap 4 is provided and between which a rolling stock 5, such as a belt 6 or metal strip, in particular a steel strip is rolled.
  • the work rolls 2, 3 are advantageously loaded in a known manner with support rolls 7, 8 in each case. If the strip 6 as rolling passes in the rolling direction 9 through the working gap 4, a material backlog 10 can occur in the immediate vicinity of the roll gap 4 and in the rolling direction in front of the roll gap 4, which leads to deformations of the rolling stock and thus causes flatness deficits of the rolling stock.
  • the backlog arises because at least temporarily more material of the rolling stock per unit time before the nip is transported or pressed than can be rolled during the same time unit and can pass through the nip.
  • the backwater is created in areas of local belt voltage drop.
  • the device 1 further comprises at least one measuring device 11 or at least one sensor which detects a material backlog 10 at the strip inlet of the roll gap.
  • This at least one measuring device 11 is a preferably mechanically measuring or non-contact measuring sensor.
  • the non-contact measuring sensor is preferably an optically measuring sensor, which optically recognizes the material backlog 10, which in part is only local.
  • the backlog in the form of a local overreduction is visible as a drop in the belt tension in these areas to ripple in front of the nip and visible to the measuring device.
  • the sensor or the measuring device 11 is arranged on the input side of the roll gap 4 and preferably detects near the roll gap 4 or in the immediate vicinity of the roll gap 4, the material backlog 10, for example, due to a surface variation of the rolling stock 5, such as the belt 6.
  • the sensor is so stated that the measurement of the material backpressure in front of the nip is made in a range of about one meter or less in front of the nip, preferably detecting a measurement of the material backlog in the range of about 200 to 300 mm in front of the nip.
  • a flatness measuring device such as a flatness measuring roller 12
  • a flatness measuring device which detects the flatness of the belt 6 behind the rolling device 1 with the nip 4.
  • the signals of the backflow measurement sensor 11 or the signals of the backflow measurement sensor 11 and the flatness measurement device 12 are fed to a control or regulating unit 13 which, on the basis of the available input data, outputs at least one drive signal 14 or a plurality of drive signals for the actuators 15, 16, 17, 18 and 19, such as flatness actuators, of the rolling arrangement, by means of which the actuators 15, 16 , 17,18 and 19 are controlled to control or control the flatness of the rolling stock.
  • the signals from the sensors 10 and 11 are fed to the control or regulation unit 13, wherein a weighting can be carried out between the two sensors or their signals, each of which can be acted upon by a preselectable additive addend and a multiplicative factor and / or individually or both signals can be acted upon by delay elements and / or be acted upon by filters.
  • a stable strip running under stable rolling conditions can be achieved, with prompt engagement can be made when a backwater 10 of the rolling material is detected in front of the nip 4.
  • a pass of 300 mm can be made in 0.3 seconds, so that a quick response in the range of tenths of a second or less is advantageous in order to control the material backlog before the Waisz gap.
  • a quick control intervention or control intervention in the case of a changing band profile, with a changed flatness, for example at the beginning of the band, at the band end or in the case of a weld seam can be undertaken.
  • the actuators 15 to 19 are preferably actuators for adjusting the angle of the work rolls 2, 3 and / or the support rolls 7, 8, the bend of the work rolls. beitswalzen 2,3 and / or intermediate rollers (sexto-type) and / or the back-up rollers 7,8, the axial displacement of the work rolls 2,3 and / or intermediate rolls (sexto-type) in the context of a so-called Continuously Variable Crown (CVC) - Displacement, a minimum quantity lubrication or a temperature control or temperature control of the belt and / or the work rolls.
  • CVC Continuously Variable Crown

Abstract

The invention relates to a method and a rolling device (1) comprising at least two working rolls (2, 3) and a roll gap (4) between the working rolls (2, 3) for leading through and rolling rolled stock (5), such as for example a strip (6), preferably of metal, and possibly comprising an arrangement of supporting rolls (7, 8), wherein at least one measuring device (11) is also provided, for measuring a backward slip of the rolled material of the rolled stock before the roll gap (4), and wherein an open-loop or closed-loop control unit (13) is also provided, activating final control elements for setting the flatness of the rolled stock on the basis of the signals from the measuring device (11).

Description

Walzvorrichtung und Verfahren für deren Betrieb Rolling device and method for its operation
Beschreibungdescription
Technisches GebietTechnical area
Die Erfindung betrifft eine Walzvorrichtung nach dem Oberbegriff von Anspruch 1 und ein Verfahren für deren Betrieb nach Anspruch 5.The invention relates to a rolling device according to the preamble of claim 1 and a method for its operation according to claim 5.
Stand der TechnikState of the art
Walzvorrichtungen sind im Stand der Technik hinlänglich bekannt. Dabei sind beispielsweise solche Walzvorrichtungen bekannt, bei welchen ein Paar von Arbeitswalzen von zumindest zwei gegenüber den Arbeitswalzen größeren Stützwalzen zur Aufnahme der Walzkräfte beaufschlagt werden. Bei solchen Walzvorrichtungen ist es weiterhin bekannt, dass die Planheit des Walzguts variieren kann, wodurch ein Materialrückstau unmittelbar vor dem Walzspalt zwischen den Arbeitswalzen entstehen kann. Kann der Materialrückstau nicht rechtzeitig und genau genug ausgeglichen werden, entstehen Ungleichmäßigkeiten in der Planheit des gewalzten Materials, was zu Qualitätseinbußen des Walzguts führt und wodurch das Walzgut ggf. für manche Anwendungsfälle gänzlich ungeeignet wird.Rollers are well known in the art. In this case, for example, such rolling devices are known in which a pair of work rolls are acted upon by at least two opposite the work rolls larger support rollers for receiving the rolling forces. In such rolling devices, it is also known that the flatness of the rolling stock may vary, whereby a material backlog can arise immediately before the nip between the work rolls. If the material backlog can not be compensated in time and precisely enough, unevenness in the flatness of the rolled material will result, which leads to a loss in quality of the rolling stock and which may make the rolling stock completely unsuitable for some applications.
Im Stand der Technik sind Walzvorrichtungen bekannt, bei welchen Planheitsmessungen mittels Zugrollen zur Ermittlung der Zugspannungsverteilung durchgeführt werden. Solche Zugrollen sind jedoch typischer Weise weit von den Arbeitswalzen entfernt angeordnet, so dass der Materialrückstau vor dem Walzspalt damit nicht zuverlässig ermittelt werden kann. Eine solche Walzvor- richtung ist beispielsweise durch die EP O 108 379 B1 bekannt geworden. Diese Druckschrift offenbart weiterhin Sensoren zur Messung des Dickenprofils, wobei auch diese Sensoren das Dickenprofil weit von dem Walzspalt entfernt ermitteln. Auch damit lässt sich ein Materialrückstau nicht zuverlässig detektieren.In the prior art rolling devices are known in which flatness measurements are carried out by means of tension rollers for determining the tensile stress distribution. However, such traction rollers are typically located far away from the work rolls, so that the material backlog before the nip so that can not be reliably determined. Such a rolling direction has become known for example from EP O 108 379 B1. This document further discloses sensors for measuring the thickness profile, wherein these sensors determine the thickness profile far away from the nip. Even so, a material backlog can not reliably be detected.
Die DE 27 43 130 offenbart eine Walzvorrichtung mit Dickenmessvorrichtungen vor und hinter dem Walzspalt, wobei damit eine vorgebbare Dickentoleranz erreicht werden kann. Allerdings kann damit der Effekt des Materialrückstaus auch nicht behoben werden, weil die Sensoren auch wiederum weit von dem Walzspalt entfernt angeordnet ist. Darüber hinaus kann eine lokale Dickenab- weichung nur in Verbindung mit einer genauen Profilreferenz aussagekräftig sein. Eine Unplanheit kann so nicht ausreichend qualifiziert werden.DE 27 43 130 discloses a rolling device with thickness measuring devices in front of and behind the nip, so that a predetermined thickness tolerance can be achieved. However, so that the effect of the material backlog can not be resolved, because the sensors in turn is located far away from the nip. In addition, localized thickness variation may be meaningful only in conjunction with an accurate profile reference. An unplanarity can not be sufficiently qualified.
Andere Walzvorrichtungen messen die Planheit lediglich in einer weiteren Entfernung hinter dem Walzspalt, was dazu führt, dass die Ergebnisse zur Rege- lung der Planheit durch Planheitsstellglieder verwendet werden. Allerdings wirken sich Fehleinstellungen des Walzgerüsts nicht immer genügend auf die aus- laufseitigen Messungen aus oder es kann aufgrund der dadurch entstehenden Verzögerung nicht schnell genug auf Profil- oder Planheitsänderungen reagiert werden kann, so dass die ermittelten Planheitsabweichungen nicht mehr korri- giert werden können, weil sie bereits hinter dem Walzspalt entstanden sind.Other rolling devices only measure the flatness at a further distance beyond the nip, which results in the results being used by flatness actuators to control planarity. However, incorrect settings of the roll stand do not always have sufficient effect on the outfeed side measurements, or it can not be responded quickly enough to profile or flatness changes due to the resulting delay, so that the determined flatness deviations can no longer be corrected, because they have already arisen behind the nip.
Darstellung der Erfindung, Aufgabe, Lösung, VorteilePresentation of the invention, object, solution, advantages
Es ist die Aufgabe der vorliegenden Erfindung, eine Walzvorrichtung mit einer Messvorrichtung und ein Verfahren hierfür zu schaffen, bei welcher ein Materialrückstau sicher erkannt wird und dadurch eine Regelung/Steuerung zur Vermeidung von dadurch entstehenden Planheitsdefiziten bis hin zu instabilen Walzzuständen (Kneifer, Überwalzungen u. ä.) durchführbar ist. Erfindungsgemäß wird die Aufgabe bezüglich der Walzvorrichtung erreicht, durch eine Walzvorrichtung gemäß der Merkmalen von Anspruch 1 mit Walzvorrichtung mit zumindest zwei Arbeitswalze und einem Walzspalt zwischen den Arbeitswalzen zum Durchführen und Walzen eines Walzguts, wie beispielsweise eines Bandes vorzugsweise aus Metall, und gegebenenfalls einer Anordnung von Stützwalzen, wobei weiterhin zumindest eine Messvorrichtung vorgesehen ist zum Messen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt, wobei weiterhin eine Steuer- oder Regeleinheit vorgesehen ist, welche aufgrund der Signale der Messvorrichtung Stellglieder zur Einstellung der Planheit des Walzguts ansteuert.It is the object of the present invention to provide a rolling device with a measuring device and a method for this, in which a material backlog is reliably detected and thereby control / control to avoid consequent flatness deficits up to unstable rolling conditions (pinch, Überwalzungen u. Ä.) Is feasible. According to the invention the object is achieved with respect to the rolling device, by a rolling device according to the features of claim 1 with rolling device with at least two work rolls and a nip between the work rolls for performing and rolling a rolling stock, such as a belt preferably made of metal, and optionally an arrangement of Support rollers, further comprising at least one measuring device is provided for measuring a backlog of the rolling stock of the rolling stock in front of the nip, further wherein a control or regulating unit is provided, which actuates actuators for adjusting the flatness of the rolling stock due to the signals of the measuring device.
Dabei ist es vorteilhaft, wenn weiterhin nach dem Walzspalt eine Planheits- messvorrichtung vorgesehen ist, welche ebenfalls Signale für die Steuer- oder Regeleinheit zur Verfügung stellt, worauf hin diese im Ansprechen auf die Signale der Messvorrichtung und der Planheitsmessvorrichtung die Stellglieder zur Einstellung der Planheit des Walzguts ansteuert.In this case, it is advantageous if, after the roll gap, a flatness measuring device is provided, which likewise provides signals for the control or regulating unit, whereupon, in response to the signals of the measuring device and the flatness measuring device, the actuators for adjusting the flatness of the Walzguts drives.
Auch ist es zweckmäßig, wenn ein Stellglied zur Einstellung der Planheit des Walzguts ein Stellglied zur Einstellung der Schräglage der Arbeitswalzen und/oder der Zwischenwalzen und/oder der Stützwalzen, der Biegung der Ar- beitswalzen und/oder der Zwischenwalzen, und/oder der Stützwalzen, der Axialverschiebung der Arbeitswalzen und/oder der Zwischenwalzen, beispielsweise im Rahmen einer Continuously Variable Crown-(CVC)- Verschiebung, einer Minimalmengenschmierung und/oder einer Temperatursteuerung oder Temperaturregelung des Bandes und/oder der Arbeitswalzen ist. Dadurch kann die gewünschte Planheit bevorzugt beeinflusst und eingestellt werden.It is also expedient if an actuator for adjusting the flatness of the rolling stock comprises an actuator for adjusting the inclination of the work rolls and / or the intermediate rolls and / or the backup rolls, the bending of the work rolls and / or the intermediate rolls, and / or the backup rolls which is axial displacement of the work rolls and / or the intermediate rolls, for example in the context of a Continuously Variable Crown (CVC) shift, a minimum quantity lubrication and / or a temperature control or temperature control of the belt and / or the work rolls. As a result, the desired flatness can preferably be influenced and adjusted.
Dabei ist es vorzugsweise vorteilhaft, wenn die zumindest eine Messvorrichtung zum Messen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt eine optisch oder mechanisch messende Messvorrichtung ist. Erfindungsgemäß wird die Aufgabe bezüglich des Verfahrens erreicht, durch ein Verfahren zum Betreiben einer Walzvorrichtung gemäß Anspruch 5. Die Vorteile dieses Verfahrens entsprechen den oben mit Bezug auf die Vorrichtung angegebenen Vorteilen.In this case, it is preferably advantageous if the at least one measuring device for measuring a backlog of the rolling material of the rolling stock in front of the roll gap is an optically or mechanically measuring measuring device. According to the invention, the object with respect to the method is achieved by a method for operating a rolling device according to claim 5. The advantages of this method correspond to the advantages stated above with respect to the device.
Auch ist es zweckmäßig, wenn die zumindest eine Messvorrichtung zum Messen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt den Rückstau optisch oder mechanisch detektiert.It is also expedient if the at least one measuring device for measuring a backlog of the rolling material of the rolling stock before the roll gap detects the backlog optically or mechanically.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen beschrieben.Advantageous developments are described in the subclaims.
Kurze Beschreibung der ZeichnungenBrief description of the drawings
Nachstehend wird die Erfindung auf der Grundlage eines Ausführungsbeispiels anhand der Zeichnungen näher erläutert. Es zeigt:The invention will be explained in more detail on the basis of an embodiment with reference to the drawings. It shows:
Figur 1 eine schematische Darstellung einer Walzvorrichtung mit Messvorrichtung.Figure 1 is a schematic representation of a rolling device with measuring device.
Bevorzugte Ausführung der ErfindungPreferred embodiment of the invention
Die Figur 1 zeigt schematisch eine Walzvorrichtung 1 mit zwei Arbeitswalzen 2,3 zwischen welchen ein Walzspalt 4 vorgesehen ist und zwischen welchen ein Walzgut 5, wie beispielsweise ein Band 6 oder Metallband, wie insbesondere ein Stahlband gewalzt wird. Die Arbeitswalzen 2,3 sind dabei vorteilhaft in bekannter Weise jeweils mit Stützwalzen 7,8 beaufschlagt. Läuft das Band 6 als Walzgut in Walzrichtung 9 durch den Arbeitsspalt 4, so kann in der unmittelbaren Nähe des Walzspalts 4 und in Walzrichtung vor dem Walzspalt 4 ein Mate- rialrückstau 10 auftreten, welcher zu Deformationen des Walzguts führt und somit Planheitsdefizite des Walzguts verursacht. Der Rückstau entsteht, weil zumindest temporär mehr Material des Walzguts pro Zeiteinheit vor den Walzspalt transportiert bzw. gedrückt wird als während derselben Zeiteinheit gewalzt werden kann und den Walzspalt passieren kann. Der Rückstau entsteht in Bereichen lokalen Bandspannungsabfalls.1 shows schematically a rolling device 1 with two work rolls 2,3 between which a roll gap 4 is provided and between which a rolling stock 5, such as a belt 6 or metal strip, in particular a steel strip is rolled. The work rolls 2, 3 are advantageously loaded in a known manner with support rolls 7, 8 in each case. If the strip 6 as rolling passes in the rolling direction 9 through the working gap 4, a material backlog 10 can occur in the immediate vicinity of the roll gap 4 and in the rolling direction in front of the roll gap 4, which leads to deformations of the rolling stock and thus causes flatness deficits of the rolling stock. The backlog arises because at least temporarily more material of the rolling stock per unit time before the nip is transported or pressed than can be rolled during the same time unit and can pass through the nip. The backwater is created in areas of local belt voltage drop.
Die Vorrichtung 1 weist weiterhin zumindest eine Messvorrichtung 11 oder zumindest ein Sensor auf, welcher einen Materialrückstau 10 am Bandeinlauf des Walzspalts detektiert. Diese zumindest eine Messvorrichtung 11 ist ein vorzugsweise mechanisch messender oder berührungslos messender Sensor. Der berührungslos messende Sensor ist vorzugsweise ein optisch messender Sen- sor, der den zum Teil auch nur lokalen Materialrückstau 10 optisch erkennt. Der Rückstau in Form einer lokalen Überreduktion ist als Abfall der Bandspannung in diesen Bereichen bis hin zur Welligkeit vor dem Walzspalt sichtbar und für die Messvorrichtung erkennbar.The device 1 further comprises at least one measuring device 11 or at least one sensor which detects a material backlog 10 at the strip inlet of the roll gap. This at least one measuring device 11 is a preferably mechanically measuring or non-contact measuring sensor. The non-contact measuring sensor is preferably an optically measuring sensor, which optically recognizes the material backlog 10, which in part is only local. The backlog in the form of a local overreduction is visible as a drop in the belt tension in these areas to ripple in front of the nip and visible to the measuring device.
Der Sensor bzw. die Messvorrichtung 11 ist an der Eingangsseite des Walzspalts 4 angeordnet und erkennt vorzugsweise nahe dem Walzspalt 4 oder in unmittelbarer Nähe des Walzspalts 4 den Materialrückstau 10 beispielsweise aufgrund einer Oberflächenvariation des Walzguts 5, wie des Bandes 6. Der Sensor ist dabei derart ausgeführt, dass die Messung des Materialrückstaus vor dem Walzspalt etwa in einem Bereich von einem Meter oder weniger vor dem Walzspalt durchgeführt wird, wobei vorzugsweise eine Messung des Materialrückstaus im Bereich von etwa 200 bis 300 mm vor dem Walzspalt detektiert wird.The sensor or the measuring device 11 is arranged on the input side of the roll gap 4 and preferably detects near the roll gap 4 or in the immediate vicinity of the roll gap 4, the material backlog 10, for example, due to a surface variation of the rolling stock 5, such as the belt 6. The sensor is so stated that the measurement of the material backpressure in front of the nip is made in a range of about one meter or less in front of the nip, preferably detecting a measurement of the material backlog in the range of about 200 to 300 mm in front of the nip.
Ausgangsseitig ist nach dem Walzspalt 4, in Walzrichtung betrachtet, vorzugsweise eine Planheitsmessvorrichtung, wie eine Planheitsmessrolle 12, vorgesehen, welche die Planheit des Bandes 6 hinter der Walzvorrichtung 1 mit dem Walzspalt 4 erkennt.On the output side, after the nip 4, viewed in the rolling direction, preferably a flatness measuring device, such as a flatness measuring roller 12, is provided, which detects the flatness of the belt 6 behind the rolling device 1 with the nip 4.
Die Signale des Sensors 11 zur Messung des Rückstaus oder die Signale des Sensors 11 zur Messung des Rückstaus und der Planheitsmessvorrichtung 12 werden einer Steuer- oder Regeleinheit 13 zugeführt, welche anhand der verfügbaren Eingangsdaten zumindest ein Ansteuersignal 14 oder eine Mehrzahl von Ansteuersignalen für die Stellglieder 15, 16,17,18 und 19, wie Planheitsstellglieder, der Walzanordnung ausgibt, mittels welchen die Stellglieder 15, 16,17,18 und 19 angesteuert werden, um die Planheit des Walzguts zu re- geln oder zu steuern.The signals of the backflow measurement sensor 11 or the signals of the backflow measurement sensor 11 and the flatness measurement device 12 are fed to a control or regulating unit 13 which, on the basis of the available input data, outputs at least one drive signal 14 or a plurality of drive signals for the actuators 15, 16, 17, 18 and 19, such as flatness actuators, of the rolling arrangement, by means of which the actuators 15, 16 , 17,18 and 19 are controlled to control or control the flatness of the rolling stock.
Die Signale der Sensoren 10 und 11 werden der Steuer- oder Regeleinheit 13 zugeführt, wobei zwischen den beiden Sensoren bzw. deren Signalen eine Gewichtung durchgeführt werden kann, die jeweils mit einem vorwählbaren additi- ven Summanden und einem multiplikativen Faktor beaufschlagbar sind und/oder einzeln oder beide Signale mit Verzögerungsgliedern beaufschlagbar sind und/oder mit Filtern beaufschlagbar sind.The signals from the sensors 10 and 11 are fed to the control or regulation unit 13, wherein a weighting can be carried out between the two sensors or their signals, each of which can be acted upon by a preselectable additive addend and a multiplicative factor and / or individually or both signals can be acted upon by delay elements and / or be acted upon by filters.
Durch die Erfassung des Rückstaus 10 vor dem Walzspalt 4 und/oder des Rückstaus 10 vor dem Walzspalt 4 und der Planheit hinter dem Walzspalt kann ein stabiler Bandlauf bei stabilen Walzbedingungen erzielt werden, wobei zeitnah ein Eingriff vorgenommen werden kann, wenn ein Rückstau 10 des zu walzenden Materials vor dem Walzspalt 4 detektiert wird. Zeitnah bedeutet dabei vorzugsweise, dass die Regelung bzw. Steuerung in Echtzeit, also ohne große Zeitverzögerung, d. h. im Bereich von ca. 1 Sekunde oder weniger bis in den Bereich von Bruchteilen einer Sekunde Zeitverzögerung erfolgt. Bei einer Bandgeschwindigkeit von 60 m / min kann ein Durchlauf von 300 mm in 0,3 Sekunden erfolgen, so dass eine schnelle Rückmeldung im Bereich von Zehntelsekunden oder weniger vorteilhaft ist, um den Materialrückstau vor dem WaIz- spalt auszuregeln. Dadurch kann ein schneller Steuerungseingriff bzw. Regelungseingriff bei sich veränderndem Bandprofil, bei veränderter Planheit beispielsweise am Bandanfang, am Bandende oder bei einer Schweißnaht vorgenommen werden.By detecting the backflow 10 before the nip 4 and / or the backwater 10 before the nip 4 and the flatness behind the nip, a stable strip running under stable rolling conditions can be achieved, with prompt engagement can be made when a backwater 10 of the rolling material is detected in front of the nip 4. In the near future, this means preferably that the control or control in real time, ie without a long time delay, d. H. in the range of about 1 second or less to within the range of fractions of a second time delay. At a belt speed of 60 m / min, a pass of 300 mm can be made in 0.3 seconds, so that a quick response in the range of tenths of a second or less is advantageous in order to control the material backlog before the Waisz gap. As a result, a quick control intervention or control intervention in the case of a changing band profile, with a changed flatness, for example at the beginning of the band, at the band end or in the case of a weld seam, can be undertaken.
Bevorzugt sind die Stellglieder 15 bis 19 Stellglieder zur Einstellung der Schräglage der Arbeitswalzen 2,3 und/oder der Stützwalzen 7,8 , der Biegung der Ar- beitswalzen 2,3 und/oder Zwischenwalzen (Sexto-Bauart) und/oder der Stützwalzen 7,8, der Axialverschiebung der Arbeitswalzen 2,3 und/oder Zwischenwalzen (Sexto-Bauart) im Rahmen einer so genannten Continuously Variable Crown-(CVC )- Verschiebung, einer Minimalmengenschmierung oder einer Tem- peratursteuerung oder Temperaturregelung des Bandes und/oder der Arbeits- walzen. The actuators 15 to 19 are preferably actuators for adjusting the angle of the work rolls 2, 3 and / or the support rolls 7, 8, the bend of the work rolls. beitswalzen 2,3 and / or intermediate rollers (sexto-type) and / or the back-up rollers 7,8, the axial displacement of the work rolls 2,3 and / or intermediate rolls (sexto-type) in the context of a so-called Continuously Variable Crown (CVC) - Displacement, a minimum quantity lubrication or a temperature control or temperature control of the belt and / or the work rolls.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Walzvorrichtung1 rolling device
2 Arbeitswalze 3 Arbeitswalze2 stripper 3 stripper
4 Walzspalt4 rolling gap
5 Walzgut5 rolling stock
6 Band6 band
7 Stützwalze 8 Stützwalze7 Back-up roll 8 Back-up roll
9 Walzrichtung9 rolling direction
10 Materialrückstau10 material backlog
11 Messvorrichtung11 measuring device
12 Planheitsmessrolle 13 Steuer- oder Regeleinheit12 Flatness measuring roller 13 Control unit
14 Ansteuersignal14 drive signal
15 Stellglied15 actuator
16 Stellglied16 actuator
17 Stellglied 18 Stellglied17 actuator 18 actuator
19 Stellglied 19 actuator

Claims

Patentansprüche claims
1. Walzvorrichtung (1 ) mit zumindest zwei Arbeitswalzen (2,3) und einem Walzspalt (4) zwischen den Arbeitswalzen (2,3) zum Durchführen und1. rolling device (1) with at least two work rolls (2,3) and a roll gap (4) between the work rolls (2,3) for performing and
Walzen eines Walzguts (5), wie beispielsweise eines Bandes (6) vorzugsweise aus Metall, und gegebenenfalls einer Anordnung von Stützwalzen (7,8), dadurch gekennzeichnet, dass weiterhin zumindest eine Messvorrichtung (11 ) vorgesehen ist zumRolling of a rolling stock (5), such as a belt (6) preferably made of metal, and optionally an array of support rollers (7,8), characterized in that further at least one measuring device (11) is provided for
Messen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt (4), wobei weiterhin eine Steuer- oder Regeleinheit (13) vorgesehen ist, welche aufgrund der Signale der Messvorrichtung (11 ) Stellglieder zur Einstellung der Planheit des Walzguts ansteuert.Measuring a backlog of the rolling stock of the rolling stock in front of the nip (4), wherein further a control or regulating unit (13) is provided, which actuates actuators for adjusting the flatness of the rolling stock on the basis of the signals of the measuring device (11).
2. Walzvorrichtung (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass weiterhin nach dem Walzspalt eine Planheitsmessvorrichtung (12) vorgesehen ist, welche Signale für die Steuer- oder Regeleinheit (13) zur Verfügung stellt, worauf hin diese aufgrund der Signale der Messvorrichtung (11 ) und der Planheitsmessvorrichtung (12) die Stellglieder (15, 16, 17, 18, 19) zur Einstellung der Planheit des Walzguts ansteuert.2. rolling device (1) according to claim 1, characterized in that further after the nip a flatness measuring device (12) is provided, which signals for the control or regulating unit (13) is available, whereupon these on the basis of the signals of the measuring device ( 11) and the flatness measuring device (12) controls the actuators (15, 16, 17, 18, 19) for adjusting the flatness of the rolling stock.
3. Walzvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass ein Stellglied zur Einstellung der Planheit des Walzguts ein Stellglied zur Einstellung der Schräglage der Arbeitswalzen (2,3) und/oder der Stützwalzen (7,8), der Biegung der Arbeitswalzen und/oder Zwischenwalzen (2,3) und/oder der Stützwalzen (7,8), der Axialverschiebung der Arbeitswalzen (2,3) und/oder Zwischenwalzen (2,3) im Rahmen einer continuous variable crown-(CVC)-Verschiebung, einer Mi- nimalmengenschmierung und/oder einer Temperatursteuerung oder Temperaturregelung des Bandes und/oder der Arbeitswalzen ist.3. Rolling device according to claim 1, characterized in that an actuator for adjusting the flatness of the rolling stock, an actuator for adjusting the skew of the work rolls (2,3) and / or the support rollers (7,8), the bending of the work rolls and / or Intermediate rolls (2,3) and / or the support rollers (7,8), the axial displacement of the work rolls (2,3) and / or intermediate rolls (2,3) in the context of a continuous variable crown (CVC) shift, a Mi - nimalmengenschmierung and / or a temperature control or temperature control of the belt and / or the work rolls is.
4. Walzvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die zumindest eine Messvorrichtung (11 ) zum Messen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt (4) eine optisch oder mechanisch messende Messvorrichtung ist.4. Rolling device according to one of the preceding claims, characterized in that the at least one measuring device (11) for measuring a backlog of the rolling material of the rolling stock in front of the nip (4) is an optically or mechanically measuring measuring device.
5. Verfahren zum Betreiben einer Walzvorrichtung (1 ) mit zumindest zwei Arbeitswalzen (2,3) und einem Walzspalt (4) zwischen den Arbeitswalzen5. A method for operating a rolling device (1) with at least two work rolls (2,3) and a roll gap (4) between the work rolls
(2,3) zum Durchführen und Walzen eines Walzguts (5), wie beispielsweise eines Bandes (6) vorzugsweise aus Metall, gekennzeichnet durch Erkennen eines Rückstaus des Walzmaterials des Walzguts vor dem Walzspalt (4), und Ansteuern von zumindest einem Stellglied zur Einstellung der Planheit des Walzguts nach Maßgabe des erkannten Rückstaus.(2,3) for carrying out and rolling a rolling stock (5), such as a strip (6) preferably made of metal, characterized by detecting a backlog of the rolling material of the rolling stock in front of the nip (4), and driving at least one actuator for adjustment the flatness of the rolling stock in accordance with the detected backwater.
6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, die Einstellung der Planheit des Walzguts unter zusätzlicher Berücksichtigung von Planheitsmesssignalen erfolgt, welche die Planheit des Walzguts hinter dem Walzspalt repräsentieren.6. The method according to claim 5, characterized in that the adjustment of the flatness of the rolling stock takes place with additional consideration of flatness measuring signals representing the flatness of the rolling stock behind the nip.
7. Verfahren nach einem der vorhergehenden Ansprüche 5 oder 6, dadurch gekennzeichnet, dass der Rückstau des Walzmaterials des Walzguts vor dem Walzspalt (4) optisch oder mechanisch detektiert wird.7. The method according to any one of the preceding claims 5 or 6, characterized in that the backwater of the rolling material of the rolling stock before the rolling gap (4) is detected optically or mechanically.
ö. Verfahren nach den Ansprüchen 1 - 6, dadurch gekennzeichnet, dass die Bandspannungssituation mittels einer in Walzspaltnähe angebrachten in das Band eingetauchten Rolle, beispielsweise Anti-Crimping- RoIIe1 erfasst wird.ö. Process according to claims 1-6, characterized in that the belt tension situation is detected by means of a roller, for example anti-crimping roller 1, which has been inserted into the belt and located near the nip gap.
9. Verfahren nach Anspruch 8 gekennzeichnet durch zwei Kraftmessdosen unter den Lagerungen der Rolle zur gleichzeitigen Erfassung des Differenzbandzuges zur Regelung von Planheitsfehlern 1. Ordnung (Schräglagenfehler) und der globalen Bandzugspannung / bzw. Bandzugkraft am Einlauf des Walzgerüstes. 9. The method according to claim 8, characterized by two load cells under the bearings of the roller for simultaneous detection of the difference band train to control flatness errors 1st order (skew error) and the global Bandzugspannung / or tape tension at the inlet of the rolling stand.
EP08802476A 2007-09-26 2008-09-22 Rolling device and method for the operation thereof Active EP2195126B1 (en)

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DE102007046189 2007-09-26
DE102008015828A DE102008015828A1 (en) 2007-09-26 2008-03-27 Rolling device and method for its operation
PCT/EP2008/007981 WO2009043501A1 (en) 2007-09-26 2008-09-22 Rolling device and method for the operation thereof

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US20110030433A1 (en) 2011-02-10
DE102008015828A1 (en) 2009-04-02
AU2008306213A1 (en) 2009-04-09
RU2427437C1 (en) 2011-08-27
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ES2394234T3 (en) 2013-01-23
EP2195126B1 (en) 2012-11-14
CA2700752A1 (en) 2009-04-09
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ZA201000566B (en) 2010-09-29
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