EP0599277B1 - Method and device for controlling the thermally-caused contour of working rolls - Google Patents

Method and device for controlling the thermally-caused contour of working rolls Download PDF

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Publication number
EP0599277B1
EP0599277B1 EP93118846A EP93118846A EP0599277B1 EP 0599277 B1 EP0599277 B1 EP 0599277B1 EP 93118846 A EP93118846 A EP 93118846A EP 93118846 A EP93118846 A EP 93118846A EP 0599277 B1 EP0599277 B1 EP 0599277B1
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EP
European Patent Office
Prior art keywords
working rolls
covering shells
strip
covering
shells
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.)
Expired - Lifetime
Application number
EP93118846A
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German (de)
French (fr)
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EP0599277A1 (en
Inventor
Jürgen Seidel
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SMS Siemag AG
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SMS Schloemann Siemag AG
Schloemann Siemag AG
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Priority claimed from DE4337288A external-priority patent/DE4337288A1/en
Application filed by SMS Schloemann Siemag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0599277A1 publication Critical patent/EP0599277A1/en
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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
    • 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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally

Definitions

  • the invention relates to a method and an apparatus for Implementation of the method according to the preamble of claim 1.
  • JP-A 54 023 060 is a roller crown control device become known in the axial direction of the work rolls has displaceable locking plates which, depending on the Location of the belt edges are positionable and prevent cooling water on the parts of the work rolls not occupied by the rolling stock arrives and which also have heating devices by means of which the end areas of the work rolls are inevitably heated.
  • DE-A-36 14 487 discloses in the axial direction of the work rolls sliding devices for applying lubricant, which in the roller area outside the belt edges different from Roll area is tempered within the strip edges, wherein in Depending on the band edges, a sharp boundary line between the different temperature lubricant is set.
  • the invention has for its object a method for control the thermal contour and a device for To demonstrate implementation of this procedure, with the actual contour of the work rolls when rolling strip material, especially in the band edge contact area in the sense of an alignment can be influenced to the target work roll contour.
  • a controlled or regulated coolant supply to the central area the work rolls as well as sealing off the cover shells against that Coolants allow an even better adjustment of the thermal contingent work roll actual contour at its target contour.
  • the task is characterized by the features of the claim 5 solved. Because the undesired thermal crowning in the band edge contact area of the work rolls and in the area of the rolls, in who has no contact with the rolling stock is trained at a Application of the measure according to claim 5 a sufficient leveling guaranteed the temperature in these rolling areas.
  • the target crowning of the work rolls can be optimally adjusted, if the control device has a computer for calculating the thermal Has crowning or the control device measuring rollers or Temperature sensors assigned to determine the thermal crowning are.
  • the setting of the work roll contour can be done by combination of heaters arranged on the tape inlet side, e.g. B. induction heaters, with cover shells arranged on the conveyor outlet side optimize.
  • heaters arranged on the tape inlet side e.g. B. induction heaters
  • cover shells arranged on the conveyor outlet side optimize.
  • the thermal crown is applied to the work rolls from To keep tape edge contact area away, seals and where appropriate, compressed air nozzles proposed. It has proven itself the cover plates with a rectangular shape against cover plates with exchange other shapes to cover the transitions between those covered Areas of the work rolls and the uncovered Areas, and thus better influence the balance of heat to be able to.
  • FIG 1 the band 1 can be seen, over which the thermal conditional contour of a work roll 2, 2 ', 2' ', 2' '' to four different ones Operating conditions is shown.
  • Operating condition a) represents a work roll 2 'with a conventional contour
  • the area of the band edges 3 is already a sharp drop in the determine thermal crowning, resulting in rolling considerable flatness errors / profile errors arise in the strip edge area.
  • Figure 2 is the belt 1 and the work roll 2 and a part a support roller 4. Rolling strip on the inlet side and rolling strip on the outlet side cover shells 5, 6 are shown. Furthermore are Cooling devices 7, 8 to recognize the coolant on the Middle areas of the work roll 2 are delivered.
  • the covers 5, 6 associated drives 9, 10 serve to cover the shells 5, 6 to pivot away from the work roll 2, possibly carry out the necessary maintenance work or change the roller to be able to. Conventional wipers 11, 12 prevent coolant can get onto the rolled strip.
  • Figure 3 shows bearing blocks 13, 14, the guides 15, 16 rotatable to store.
  • the guides 15, 16 point out from the indicated center considered, on the one hand right-hand thread 15 ', 16' and on the other hand Left-hand thread 15 '', 16 '' on.
  • the guides are rotating synchronized via a chain 19.
  • For the rotary drive of the guide threaded rods 15, 16 provides a motor 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

In order to bring the thermally caused contour of working rolls closer to a desired contour when rolling strip, especially in the strip-edge contact area, covering shells which can be adjusted in their position relative to the working rolls are proposed and these can be used to influence the surface temperature of the working rolls in the strip-edge area. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Durchführung des Verfahrens nach dem Oberbegriff des Anspruchs 1.The invention relates to a method and an apparatus for Implementation of the method according to the preamble of claim 1.

Beim Warmwalzen von Bandmaterialien nimmt ohne die Korrektur durch Stellglieder, bedingt durch den Einfluß der thermischen Belastung die Balligkeit der Arbeitswalzen mit zunehmendem Walzmaterial-Durchsatz ständig zu. Durch die sich so ändernde thermische Bombierung weicht die Walzenkontur zunehmend von der Sollkontur ab.When hot rolling strip materials takes place without the correction Actuators due to the influence of the thermal load the crown of the work rolls with increasing rolling material throughput constantly to. Due to the changing thermal crowning the roller contour increasingly deviates from the target contour.

Es ist bekannt, die thermisch bedingte Kontur der zu walzenden Walzbandmitte durch geeignete Stellglieder wie Verschiebe- und/oder Biegeglieder, z. B. "CVC"-Verschiebung oder eine geeignete Kühlung im Sinne einer Angleichung der Istkontur an die Sollkontur der Arbeitswalzen zu beeinflussen. Die Kontur der Walzen im Kontaktbereich mit den Bandkanten ist dagegen jedoch nur ungenügend beeinflußbar. Auch ein Walzen von Bandmaterial unterschiedlicher Breite oder das zyklische Verschieben der Arbeitswalzen gegeneinander ergibt kaum eine Verbesserung der thermisch bedingten Walzkontur im Bandkanten-Kontaktbereich.It is known the thermal contour of the to be rolled Roll strip center by suitable actuators such as displacement and / or Bending members, e.g. B. "CVC" shift or suitable cooling in the sense of aligning the actual contour to the target contour of the Affect work rolls. The contour of the rollers in the contact area with the band edges, however, can only be influenced insufficiently. Also rolling of strip material of different widths or the cyclical shifting of the work rolls against each other hardly results in an improvement of the thermally induced rolling contour in the band edge contact area.

Durch die JP-A 54 023 060 ist eine Walzenballigkeits-Steuervorrichtung bekannt geworden, die in axialer Richtung der Arbeitswalzen verschiebbare Sperrplatten aufweist, welche in Abhängigkeit von der Lage der Bandkanten positionierbar sind und verhindern, dass Kühlwasser auf die nicht vom Walzgut belegten Teile der Arbeitswalzen gelangt und die zudem Heizvorrichtungen aufweisen, mittels derer die Endbereiche der Arbeitswalzen zwangsläufig geheizt werden.JP-A 54 023 060 is a roller crown control device become known in the axial direction of the work rolls has displaceable locking plates which, depending on the Location of the belt edges are positionable and prevent cooling water on the parts of the work rolls not occupied by the rolling stock arrives and which also have heating devices by means of which the end areas of the work rolls are inevitably heated.

Mit dieser Vorrichtung wird zwar versucht, die Balligkeit von Arbeitswalzen während des Walzvorgangs durch entsprechende Positionssteuerung der Sperrplatten zu verbessern, durch die Verschiebung der Sperrplatten lediglich in Abhängigkeit von den Bandkantenpositionen ist jedoch ein Optimieren der Balligkeit der Arbeitswalzen auch in dem die Bandkanten umgebenden Bereich der Arbeitswalzen nicht möglich.With this device an attempt is made to crown the crown Work rolls during the rolling process through appropriate position control to improve the locking plates by moving the locking plates only depending on the belt edge positions is, however, an optimization of the crown of the work rolls also in the area of the work rolls surrounding the strip edges not possible.

Die DE-A-36 14 487 offenbart in axialer Richtung der Arbeitswalzen verschiebbare Vorichtungen zum Aufbringen von Schmiermittel, welches im Walzenbereich außerhalb der Bandkanten unterschiedlich zum Walzenbereich innerhalb der Bandkanten temperiert ist, wobei in Abhängigkeit von den Bandkanten eine scharfe Grenzlinie zwischen dem unterschiedlich temperierten Schmiermittel eingestellt wird.DE-A-36 14 487 discloses in the axial direction of the work rolls sliding devices for applying lubricant, which in the roller area outside the belt edges different from Roll area is tempered within the strip edges, wherein in Depending on the band edges, a sharp boundary line between the different temperature lubricant is set.

Mit dieser Vorrichtung sollen Kantenspannungen bei Feinbändern und Folien vermieden werden. Eine gezielte Beeinflussung der Bombierung der Arbeitswalzen dahingehend, da die Ist-Bombierung an eine Soll-Bombierung herangeführt wird, ist nicht möglich.With this device edge tensions in fine strips and Foils to be avoided. A targeted influence on the crowning of the work rolls in that the actual crowning corresponds to a target crowning is not possible.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Steuerung der thermisch bedingten Kontur sowie eine Vorrichtung zur Durchführung dieses Verfahrens aufzuzeigen, mit dem bzw. mit der die Istkontur der Arbeitswalzen beim Walzen von Bandmaterial, insbesondere im Bandkanten-Kontaktbereich im Sinne einer Angleichung an die Soll-Arbeitswalzenkontur beeinflußbar ist.The invention has for its object a method for control the thermal contour and a device for To demonstrate implementation of this procedure, with the the actual contour of the work rolls when rolling strip material, especially in the band edge contact area in the sense of an alignment can be influenced to the target work roll contour.

Diese Aufgabe wird verfahrensmäßig durch die Merkmale des Anspruchs 1 gelöst. Durch diese Maßnahmen wird erreicht, daß die Walzen im Kontaktbereich mit den Bandkanten und vor allem neben dem Band-Kontaktbereich warmgehalten werden, so daß die thermische Bombierung in dem abgedeckten Band verbreitert wird und der steile, durch das schnelle Abfließen von Wärme bewirkte Abfall neben dem Bandkanten-Kontaktbereich durch das Warmhalten weiter nach außen verschoben wird. Dabei ist von Bedeutung, daß die thermisch bedingte Kontur im Bandkanten-Kontaktbereich der Arbeitswalzen in einem Rechner anhand eines Rechenmodells berechnet oder aber die thermische Bombierung bzw. der Temperaturverlauf der Arbeitswalzen in Achsrichtung gemessen wird, um so eine Verschiebeposition für die Abdeckschalen zu ermitteln, an der die thermische Bombierung am besten kompensiert und der steile Abfall am weitesten nach außen verschoben wird.This task is procedurally based on the features of the claim 1 solved. These measures ensure that the rollers in Contact area with the band edges and especially next to the band contact area be kept warm so that the thermal crowning is broadened in the covered band and the steep, through which Rapid heat drainage caused waste next to the belt edge contact area moved further outward by keeping warm becomes. It is important that the thermal contour in the strip edge contact area of the work rolls in a computer calculated using a calculation model or the thermal Bombing or the temperature profile of the work rolls in the axial direction is measured, so as a shift position for the To determine cover shells on which the thermal crowning on best compensated and the steepest drop to the outside is moved.

Werden hier bekannte Verfahren wie z. B. das zyklische Verschieben der Arbeitswalzen bzw. das Walzen von Bändern unterschiedlicher Breite zusätzlich angewandt, so ist eine noch größere Beeinflussung, z. B. Vergleichmäßigung der thermischen Bombierung im Bandkanten-Kontaktbereich zu erreichen.Are known methods such. B. cyclical shifting the work rolls or the rolling of strips different Width is also applied, so there is an even greater influence, e.g. B. Uniformization of the thermal crowning in the band edge contact area to reach.

Eine gesteuerte bzw. geregelte Kühlmittelzufuhr zum Mittelbereich der Arbeitswalzen sowie ein Abschotten der Abdeckschalen gegen das Kühlmittel erlauben einen noch besseren Angleich der thermisch bedingten Arbeitswalzen-Istkontur an deren Sollkontur.A controlled or regulated coolant supply to the central area the work rolls as well as sealing off the cover shells against that Coolants allow an even better adjustment of the thermal contingent work roll actual contour at its target contour.

Vorrichtungsmäßig wird die Aufgabe durch die Merkmale des Anspruchs 5 gelöst. Da sich die unerwünschte thermische Bombierung im Bandkanten-Kontaktbereich der Arbeitswalzen und im Bereich der Walzen, in dem kein Kontakt mit dem Walzgut besteht, ausbildet, wird bei einer Anwendung der Maßnahme nach Anspruch 5 eine ausreichende Vergleichmäßigung der Temperatur in diesen Walzbereichen gewährleistet. Dabei läßt sich die Soll-Bomierung der Arbeitswalzen optimal einregeln, wenn die Steuervorrichtung einen Rechner zur Berechnung der thermischen Bombierung aufweist oder der Steuervorrichtung Meßrollen bzw. Temperatursensoren zur Ermittlung der thermischen Bombierung zugeordnet sind.In terms of the device, the task is characterized by the features of the claim 5 solved. Because the undesired thermal crowning in the band edge contact area of the work rolls and in the area of the rolls, in who has no contact with the rolling stock is trained at a Application of the measure according to claim 5 a sufficient leveling guaranteed the temperature in these rolling areas. Here the target crowning of the work rolls can be optimally adjusted, if the control device has a computer for calculating the thermal Has crowning or the control device measuring rollers or Temperature sensors assigned to determine the thermal crowning are.

Die Einstellung der Arbeitswalzen-Kontur läßt sich durch Kombination von bandeinlaufseitig angeordneten Heizvorrichtungen, z. B. Induktionsheizungen, mit bandauslaufseitig angeordneten Abdeckschalen optimieren.The setting of the work roll contour can be done by combination of heaters arranged on the tape inlet side, e.g. B. induction heaters, with cover shells arranged on the conveyor outlet side optimize.

Um die Arbeitswalzen wechseln zu können, ist es sinnvoll, die Abdeckschalen und ggfs. die Heizvorrichtung mit Antrieben zum Beabstanden derselben von den Arbeitswalzen auszustatten.In order to be able to change the work rolls, it makes sense to Covering shells and, if necessary, the heating device with drives for Spaced to equip them from the work rolls.

Vorteilhafte Verschiebeeinrichtungen für die Abdeckschalen und ggfs. für die Heizvorrichtung ergeben sich aus den Ansprüchen 10 bis 13. Die Arbeitswalzenkontur läßt sich gegebenenfalls noch besser beeinflussen, wenn die Abdeckschalen nicht als passive Abdeckschalen, sondern aus aufheizbare bzw. kühlbare Abdeckschalen ausgebildet sind oder aber Heizungen für die abgedeckten Walzenbereiche aufweisen.Advantageous sliding devices for the cover shells and, if necessary. for the heating device result from claims 10 to 13. The work roll contour can possibly be influenced even better, if the covers are not passive covers, but are formed from heatable or coolable cover shells or have heaters for the covered roll areas.

Um das Kühlmittel, das in der Arbeitswalzenmitte zur Beeinflussung der thermischen Crown auf die Arbeitswalzen aufgebracht wird, vom Bandkanten-Kontaktbereich fernzuhalten, werden Dichtungen und gegebenenfalls Druckluftdüsen vorgeschlagen. Es hat sich bewährt, die Abdeckschalen mit rechteckiger Form gegen Abdeckschalen mit anderen Formen auszutauschen, um die Übergänge zwischen den abgedeckten Bereichen der Arbeitswalzen und den nicht abgedeckten Bereichen, und damit den Ausgleich der Wärme besser beeinflussen zu können. To influence the coolant in the middle of the work roll the thermal crown is applied to the work rolls from To keep tape edge contact area away, seals and where appropriate, compressed air nozzles proposed. It has proven itself the cover plates with a rectangular shape against cover plates with exchange other shapes to cover the transitions between those covered Areas of the work rolls and the uncovered Areas, and thus better influence the balance of heat to be able to.

Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert. Dabei zeigen

Figur 1
die thermisch bedingte Kontur der Arbeitswalzen bei unterschiedlichen Betriebsbedingungen,
Figur 2
die Seitenansicht einer Arbeitswalze mit Abdeckschalen und
Figur 3
eine Vorderansicht auf die einer nicht gezeigten Arbeitswalze zugeordneten Abdeckschalen.
An embodiment of the invention is explained in more detail with reference to a drawing. Show
Figure 1
the thermal contour of the work rolls under different operating conditions,
Figure 2
the side view of a work roll with cover and
Figure 3
a front view of the cover shells assigned to a work roll, not shown.

In Figur 1 ist das Band 1 zu erkennen, über dem die thermisch bedingte Kontur einer Arbeitswalze 2, 2', 2'', 2''' zu vier verschiedenen Betriebsbedingungen abgebildet ist. Betriebsbedingung a) stellt eine Arbeitswalze 2' mit konventioneller Kontur dar. Im Bereich der Bandkanten 3 ist hier bereits ein starker Abfall der thermisch bedingten Bombierung festzustellen, wodurch beim Walzen im Bandkantenbereich erhebliche Planheitsfehler/Profilfehler entstehen.In Figure 1, the band 1 can be seen, over which the thermal conditional contour of a work roll 2, 2 ', 2' ', 2' '' to four different ones Operating conditions is shown. Operating condition a) represents a work roll 2 'with a conventional contour The area of the band edges 3 is already a sharp drop in the determine thermal crowning, resulting in rolling considerable flatness errors / profile errors arise in the strip edge area.

Bei der Betriebsbedingung b) ist die Arbeitswalze 2 im Bandkanten-Kontaktbereich durch Abdeckschalen abgeschirmt. Der thermische Verlauf der Bombierung ist gegenüber der konventionellen thermischen Bombierung bereits erheblich nach außen gewandert. Die sich damit einstellenden Planheitsfehler/Profilfehler sind entsprechend verringert.In the operating condition b), the work roll 2 is in the strip edge contact area shielded by cover plates. The thermal The course of the crowning is compared to the conventional thermal Bombing has already migrated considerably to the outside. The deal with it Setting flatness errors / profile errors are reduced accordingly.

In Betriebsbedingung c) werden die Arbeitswalzen 2'' zusätzlich zu den Abdeckschalen noch zyklisch in axialer Richtung verschoben. Es zeigt sich, daß hier annähernd über die gesamte Bandbreite eine gleiche thermische Bombierung zur Verfügung steht. In operating condition c) the work rolls 2 ″ are additionally the cover shells cyclically shifted in the axial direction. It it turns out that here over almost the entire bandwidth same thermal crowning is available.

Bei Betriebsbedingung d) wird der Bandkanten-Kontaktbereich großflächig von den Abdeckschalen überdeckt. Hier kommt es teilweise zu einer stärkeren thermisch bedingten Bombierung als im Mittelbereich der Arbeitswalze. Der starke Abfall der thermischen Bombierung beginnt erst außerhalb des Bandkanten-Kontaktbereichs. Die optimale Verschiebestellung der Abdeckschalen z. B. zwischen Betriebsbedingung b) und d) kann anhand von Rechenmodellen berechnet werden.In operating condition d), the strip edge contact area becomes large covered by the cover shells. Here it comes partially to a stronger thermal crowning than in the central area the work roll. The sharp drop in thermal crowning only starts outside the band edge contact area. The optimal shift position of the cover shells z. B. between operating conditions b) and d) can be calculated using calculation models will.

Der Figur 2 ist das Band 1 sowie die Arbeitswalze 2 und ein Teil einer Stützwalze 4 zu entnehmen. Walzband-einlaufseitig und Walzband-auslaufseitig sind Abdeckschalen 5, 6 gezeigt. Weiterhin sind Kühlvorrichtungen 7, 8 zu erkennen, über die Kühlmittel auf die Mittelbereiche der Arbeitswalze 2 abgegeben werden. Den Abdeckschalen 5, 6 zugeordnete Antriebe 9, 10 dienen dazu, die Abdeckschalen 5, 6 von der Arbeitswalze 2 wegzuschwenken, um eventuell notwendige Wartungsarbeiten bzw. einem Walzenwechsel durchführen zu können. Konventionelle Abstreifer 11, 12 verhindern, daß Kühlmittel auf das Walzband gelangen kann.Figure 2 is the belt 1 and the work roll 2 and a part a support roller 4. Rolling strip on the inlet side and rolling strip on the outlet side cover shells 5, 6 are shown. Furthermore are Cooling devices 7, 8 to recognize the coolant on the Middle areas of the work roll 2 are delivered. The covers 5, 6 associated drives 9, 10 serve to cover the shells 5, 6 to pivot away from the work roll 2, possibly carry out the necessary maintenance work or change the roller to be able to. Conventional wipers 11, 12 prevent coolant can get onto the rolled strip.

Figur 3 zeigt Lagerböcke 13, 14, die Führungen 15, 16 drehbar lagern. Die Führungen 15, 16 weisen von der angedeuteten Mitte aus betrachtet, einerseits Rechtsgewinde 15', 16' und andererseits Linksgewinde 15'', 16'' auf. Im Bereich der Gewinde 15', 16' ist die Abdeckschale 5' und im Bereich der Gewinde 15'', 16'' die Abdeckschale 5'' über Gewindemuttern 17', 18'; 17'', 18'' auf den Führungen 15, 16 geführt. Die Führungen sind in ihrer Drehbewegung über eine Kette 19 synchronisiert. Für den Drehantrieb der Führungs-Gewindestangen 15, 16 sorgt ein Motor 20. Durch die unterschiedlich gerichtete Steigung der Gewinde 17', 17'' und 18', 18'' werden die Abdeckschalen 5', 5'' durch den einen Motor 20 je nach dessen Drehrichtung entweder aufeinanderzu bzw. voneinanderweg bewegt. Die nicht gezeigten Antriebe 10 greifen bspw. an die Lagerböcke 13, 14 an, halten diese, und vermögen damit die Abdeckschalen 5', 5'' auf die Arbeitswalze 2 hin bzw. von dieser weg zu bewegen. Figure 3 shows bearing blocks 13, 14, the guides 15, 16 rotatable to store. The guides 15, 16 point out from the indicated center considered, on the one hand right-hand thread 15 ', 16' and on the other hand Left-hand thread 15 '', 16 '' on. In the area of the thread 15 ', 16' the cover shell 5 'and in the area of the threads 15' ', 16' ' Cover 5 '' over threaded nuts 17 ', 18'; 17 '', 18 '' on the Guides 15, 16 guided. The guides are rotating synchronized via a chain 19. For the rotary drive of the guide threaded rods 15, 16 provides a motor 20. By the different directional pitch of the threads 17 ', 17' 'and 18', 18 '' are the Covering shells 5 ', 5' 'by one motor 20 depending on its Direction of rotation either moved towards or away from each other. The Drives 10, not shown, engage, for example, the bearing blocks 13, 14 on, hold them, and are thus able to cover the 5 ', 5' ' to move the work roll 2 towards or away from it.

Liste der BezugszeichenList of reference numbers

11
Bandtape
22nd
ArbeitswalzeWork roll
33rd
BandkanteBand edge
44th
StützwalzeBackup roller
55
AbdeckschaleCover
66
AbdeckschaleCover
77
KühlvorrichtungCooler
88th
KühlvorrichtungCooler
99
Antriebdrive
1010th
Antriebdrive
1111
AbstreiferWipers
1212th
AbstreiferWipers
1313
LagerbockBearing block
1414
LagerbockBearing block
1515
Führungguide
1616
Führungguide
1717th
GewindemutterThreaded nut
1818th
GewindemutterThreaded nut
1919th
KetteChain
2020th
Motorengine

Claims (21)

  1. Method of controlling the thermally-induced profile of working rolls (2) during rolling of roll strip (1) in a given case of different widths, wherein the position of the strip edges (3) of the roll strip (1) on the working rolls is determined, characterised by the ascertaining of a displacement position for thermally insulating covering shells (5, 6), which are able to cover the roll partial lengths in the region of the strip edges (3) and thereby to influence the temperature course in the rolls (2), and by the displacing of the covering shells (5, 6) in such a manner that longitudinal regions of the rolls (2) in the strip edge contact region (3) as well as longitudinal regions of the rolls (2) which do not come into contact with the roll stock (1) during rolling are covered, that for ascertaining the displacement position for the covering shells (5, 6) the thermal dishing of the working rolls (2) in axial direction is calculated on the basis of a computer model or the thermal dishing or the roll temperature in axial direction of the working rolls (2) is measured, and that the covering shells (5, 6) are so displaced that the thermal deviations, which form in the strip edge contact region of the working rolls (2), from the desired profile of the working rolls (2) is counteracted.
  2. Method according to claim 1, characterised thereby that the regions of the working rolls (2) disposed axially between the covering shells (5', 5''; 6', 6'') can be acted on by coolant, that the coolant distribution as well as in a given case the coolant temperature distribution is determined in dependence on the thermal dishing computed for the region between the covering shells (5', 5''; 6', 6''), and that for the assimilation to the desired profile of the working rolls (2) the coolant is applied to the working rolls to act against the thermal dishing.
  3. Method according to claim 2, characterised thereby that the regions screened by the covering shells can be sealed off against the coolant relative to the region of the working rolls (2) acted on by the coolant.
  4. Method according to one of claims 1 to 3, characterised thereby that the covering shells (5, 6) are settable in their temperature and optionally in their axial temperature distribution.
  5. Device for controlling the thermally-induced profile of working rolls (2) during rolling of roll strip (1) in a given case of different widths, with a device for determining the position of the strip edges (3), for carrying out the method according to claims 1 to 4, wherein at least one thermal covering shell pair (5, 5', 6, 6') is able to thermally screen off axial length regions of the working rolls (2) over at least a part circumference, characterised by at least one displacing device for moving the covering shells (5, 6) in axial direction of the working rolls and a control device for positioning the covering shells (5, 6) at least in dependence on the roll strip edges (3), wherein the control device comprises a computer for computing the thermal dishing, or measuring rolls or temperature sensors for ascertaining the thermal dishing are associated with the control device.
  6. Device according to claim 1, characterised thereby that drives (9, 10) are provided, by means of which the covering shells (5, 6) on the working rolls (2) are movable to or from these.
  7. Device according to claim 5 or 6, characterised thereby that covering shell pairs (5, 5', 6, 6') are provided not only on the strip entry side, but also on the strip exit side of the working rolls (2).
  8. Device according to at least one of claims 5 to 7, characterised thereby that covering roll pairs (6, 6') are provided at the strip exit side of the working rolls (2), whilst heating devices reaching over the strip edge contact region (3) are provided at the strip entry side.
  9. Device according to claim 8, characterised by at least one displacing device for moving the heating devices in axial direction of the working rolls and a control device, preferably as part of the control device for positioning the covering shells, for positioning the heating devices at least in dependence on the roll strip edges (3).
  10. Device according to at least one of claims 5 to 9, characterised thereby that the displacing devices for the covering shells (5, 5', 6, 6') and in a given case the heating devices consist of two guides (15, 16), which are arranged parallel to the working rolls (2) and between which the covering shells (5, 6) provided with threaded nuts (17, 18) are guided, in the form of threaded rods, that the threaded rods (15. 16) have threads of mutually opposite sense at the two ends, that the two threaded spindles (15, 16) have a synchronously acting drive device (chain 19) and that a motor (20) is provided for the drive of the threaded spindles (15, 16).
  11. Device according to at least one of claims 5 to 9, characterised thereby that the covering shells (5, 6) and in a given case the heating devices are guided on two parallelly arranged guide posts and are drivable by means of a centrally arranged threaded rod with oppositely directed inclinations of its thread.
  12. Device according to at least one of claims 5 to 9, characterised thereby that separate guides and/or drives for the covering shells (5, 6) and in a given case the heating devices are provided for each of the sides, considered from the roll strip centre, of the working rolls (2).
  13. Device according to at least one of claims 5 to 9, characterised thereby that the displacing device for the covering shells (5, 6) and in a given case the heating device consist of at least one respective hydraulic cylinder per covering shell.
  14. Device according to at least one of claims 5 to 13, characterised thereby that cooling devices for cooling the covering shells (5, 6) are provided.
  15. Device according to at least one of claims 5 to 14, characterised thereby that, in the region between the covering shells (5, 6), coolant devices (7, 8) settable in their effective width and intensity are directed at the working rolls (2).
  16. Device according to claim 15, characterised thereby that sealing devices are associated with the covering shells (5, 6).
  17. Device according to at least one of claims 5 to 16, characterised thereby that the covering shells (5, 6) comprise an air pressure connection and air outlet nozzles in order to blow dry the region covered by them.
  18. Device according to at least one of claims 5 to 17, characterised thereby that the covering shells (5, 6) have a rectangular shape considered in rolling direction or against the rolling direction.
  19. Device according to at least one of claims 5 to 17, characterised thereby that the covering shells (5, 6) have a trapezium shape or a triangular shape, or are constructed to be round, considered in rolling direction or against the rolling direction.
  20. Device according to claim 8, characterised thereby that the heating devices are provided to be stationary in axial direction and activatable zone by zone.
  21. Device according to claim 20, characterised by at least one control device, by means of which the heating devices are activatable at least in dependence on the roll strip edge positions.
EP93118846A 1992-11-25 1993-11-24 Method and device for controlling the thermally-caused contour of working rolls Expired - Lifetime EP0599277B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4239529 1992-11-25
DE4239529 1992-11-25
DE4337288A DE4337288A1 (en) 1992-11-25 1993-11-02 Method and device for controlling the thermal contour of work rolls
DE4337288 1993-11-02

Publications (2)

Publication Number Publication Date
EP0599277A1 EP0599277A1 (en) 1994-06-01
EP0599277B1 true EP0599277B1 (en) 1998-02-04

Family

ID=25920703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118846A Expired - Lifetime EP0599277B1 (en) 1992-11-25 1993-11-24 Method and device for controlling the thermally-caused contour of working rolls

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EP (1) EP0599277B1 (en)
AT (1) ATE162966T1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19830034A1 (en) * 1998-06-26 1999-12-30 Mannesmann Ag Method for hot rolling metal especially steel strips
BE1017462A3 (en) 2007-02-09 2008-10-07 Ct Rech Metallurgiques Asbl DEVICE AND METHOD FOR COOLING ROLLING CYLINDERS IN HIGHLY TURBULENT.
US20230107171A1 (en) * 2020-01-29 2023-04-06 Primetals Technologies Japan, Ltd. Rolling mill and rolling method for metal plate

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5423060A (en) * 1977-07-23 1979-02-21 Kawasaki Steel Co Control device for roll crown while rolling
JPS56126014A (en) * 1980-03-11 1981-10-02 Ishikawajima Harima Heavy Ind Co Ltd Controller for shape of rolled sheet
GB2080719B (en) * 1980-07-30 1984-08-30 Davy Loewy Ltd Electricity Cou Rolling mill control
JPS61206502A (en) * 1985-03-08 1986-09-12 Nisshin Steel Co Ltd Control method for different peripheral-speed rolling
DE3614487A1 (en) * 1986-04-29 1987-11-05 Bbc Brown Boveri & Cie Method and device for roller temperature control in cold rolling mills
JPH0428407A (en) * 1990-05-22 1992-01-31 Ishikawajima Harima Heavy Ind Co Ltd Device for controlling surface shape of rolling roll

Also Published As

Publication number Publication date
EP0599277A1 (en) 1994-06-01
ATE162966T1 (en) 1998-02-15

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