EP2089172B1 - Method of operating a strand guiding device - Google Patents

Method of operating a strand guiding device Download PDF

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Publication number
EP2089172B1
EP2089172B1 EP07818622A EP07818622A EP2089172B1 EP 2089172 B1 EP2089172 B1 EP 2089172B1 EP 07818622 A EP07818622 A EP 07818622A EP 07818622 A EP07818622 A EP 07818622A EP 2089172 B1 EP2089172 B1 EP 2089172B1
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EP
European Patent Office
Prior art keywords
roller
cast strip
bridges
strand
bridge
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Not-in-force
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EP07818622A
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German (de)
French (fr)
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EP2089172A1 (en
Inventor
Axel Weyer
Axel Stavenow
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SMS Siemag AG
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SMS Siemag AG
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Publication of EP2089172A1 publication Critical patent/EP2089172A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1281—Vertical removing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the invention relates to a method dum enterprises a strand guiding device for supporting and guiding casting strands within a continuous casting plant, in particular for slabs and thin slabs.
  • the invention applies in principle to all types of strand guiding devices, in particular to vertical, horizontal, or sheet systems. More specifically, the invention relates to the positioning of roller bridges within a strand guiding device.
  • Strand guiding devices with roller bridges for supporting and guiding casting strands are basically known in the prior art.
  • the DE 1 583 620 A1 discloses a device for treating cast strands by rolling, in which strand guide elements provided with roller bridges are, which are held articulated on one end side and are radially displaceable on the other end side, so that the roller bridges are v-shaped relative to the neutral phase or to the central axis of the cast strand.
  • the EP 0 834 364 B1 discloses an apparatus for continuous casting with a strand thickness reduction, in which opposite rollers are provided, wherein the rollers of one side are rigidly arranged and the rollers of the other opposite side are acted upon with respect to the rigid rollers.
  • the roller bridge closest to the mold is hinged at its end closest to the mold, the other end of the roller bridge being displaceable.
  • the roller bridges following this first roller bridge are connected to one another in a coupled manner and limitedly displaceable in consideration of the coupling, wherein one end of a roller bridge can always be displaced together with another end of an adjacent roller bridge.
  • EP 0 545 104 B1 discloses an apparatus for continuous casting, wherein the device has a fixed roller set and a relative to this first set of rollers can be braced another second roller set.
  • the object of the invention is therefore to provide an apparatus and a method which allow to make the strand guide and the strand more flexible.
  • the strand guide device operated according to the invention comprises in particular at least one first adjusting element for connecting the first roller bridge to a first mainland and for individually positioning the first roller bridge with respect to the neutral phase of the casting strand and at least one second adjusting element for connecting the second roller bridge to a second mainland and for individually positioning the second roller bridge with respect to the neutral phase of the casting strand.
  • the neutral phase in the interior of a cast strand that has not yet solidified describes that fictitious line which connects the hottest points in the longitudinal direction of the strand, each viewed in a cross section of the strand. It can, but does not have to coincide with the geometric mean line of the strand, especially in the case of asymmetrical cooling.
  • the claimed method of the invention advantageously enables the two roller bridges of a segment to be set on either side of the cast strand independently of each other with respect to the neutral phase of the cast strand.
  • the reference point for the adjustment and alignment of the strand guide or the roller bridges according to the invention is no longer, as in the prior art, the roller conveyor of the fixed side, but the neutral phase of the strand.
  • individual, ie independent positioning or employment of the roller bridges on both (broad) sides of the casting strand with respect to the neutral phase of the strand or alternatively to their respective venue forms the basis for a significant quality improvement in continuous casting, especially in the production of slabs.
  • the continuous casting is improved with the invention procedurally insofar as it allows individual support of the strand shell on the individually engageable roller conveyors, the support independent and flexible in terms of optimum solidification process, but also in terms of a desired Softreduction and / or with regard to liquid core reduction to be carried out.
  • the adjusting elements are mechanically formed and allow a static adjustment of the individual position of the roller bridges with respect to the neutral phase of the cast strand with the aid of spacers, so-called spacers.
  • the adjustment elements are designed as hydraulic elements. This has the advantage that then a setting or a change in the employment of the roller bridges z. B. can also be done from a remote control room during operation of the strand guiding device.
  • a particularly stable positioning or adjustment of the roller bridges to the cast strand is achieved because the roller bridges are positioned with four provided in their respective corner areas adjustment. In particular, such a positioning is made possible at a certain angle ⁇ > 0 to the neutral phase of the casting strand.
  • the respective opposite roller bridges are attached to each different mainland.
  • the mainland is the segmental frame of the segment.
  • the mainland may also be any stationary structural element the continuous casting or in the vicinity of the continuous casting, for example, a wall act.
  • the strand guiding device operated according to the invention enable an asymmetrical adjustment of the roller bridges with respect to the neutral phase of the cast strand.
  • the roller bridges become symmetrical, i. each set at the same distance to the neutral phase of the hot strand.
  • the symmetrical adjustment or employment also includes a symmetrical employment of the roller bridges on both sides of the cast strand at an angle ⁇ > 0 against the neutral phase of the cast strand explicitly with a.
  • roller bridges with respect to the neutral phase of the cast strand can be useful, in particular, during a casting operation with regard to optimum segment conicity / taper, with regard to a liquid core reduction to be performed or with regard to soft reduction.
  • FIG. 1 shows a continuous casting plant with a continuous casting mold 210 and a strand guiding device 100.
  • the strand guiding device 100 comprises two segments. 110, which are arranged downstream in the continuous casting direction (arrow direction) of the mold 210 sequentially.
  • Each of the two segments 110 comprises a first roller bridge 114-1 on one broad side of the cast strand and a second roller bridge 114-2 on the opposite broad side of the cast strand.
  • the cast strand is in the Figures 1 - 3 represented by the vertical dotted line.
  • Each of the two roller bridges 114-1, 114-2 each includes a plurality rollers 116-1, 116-2 for supporting and guiding the cast strand.
  • the first roller bridge 114-1 is preferably variably positionable with four adjustment elements 118 on a first mainland 112-1, that is to say fixed at a variable distance. Of the four first setting elements, only two are in FIG. 1 shown and designated by reference numerals 118-3 and 118-4. Analogously, the second roller bridge 114-2 is fastened variably positionable by means of preferably four adjustment elements on a second mainland 112-2; also of these adjustment elements are only two in FIG. 1 shown and designated by reference numerals 118-1 and 118-2. All adjustment elements are used for individually positioning or adjusting their respective associated roller bridges with respect to the neutral phase N of the casting strand.
  • the locking elements are mechanically formed. That is, the individual adjustment of the roller bridges with respect to the neutral phase of the casting strand by means of spacers 119 which are placed in the region of the adjusting elements between the roller bridges and the respective mainland.
  • the employment defined by the spacers settings or the roller bridges to the cast strand are not changeable due to the high temperatures during the casting operation in the vicinity of the strand guiding device during the ongoing casting operation and thus static.
  • roller bridges 114 with respect to the neutral phase N of the casting strand is symmetrical here, because the distances of each pairwise opposite roller bridges or individual roles are equal to the neutral phase everywhere the same size.
  • FIG. 2 differs on the one hand from FIG. 1 in that the adjusting elements are here according to the invention in the form of hydraulic cylinders 118'-1, ..., 118'-4, are formed.
  • this design of the adjusting elements also allows a change in the employment of Roller bridges during the ongoing casting operation. This is particularly advantageous for a preferably continuous adjustment of the employment of the bridges to a possibly caused by the cooling process Materialdickenschund the cast strand or other casting parameters such as steel quality and casting speed during the current casting operation.
  • FIG. 2 in contrast to FIG. 1 shown an asymmetrical employment of the roller bridges to the casting strand; this is coming in FIG. 2 characterized in that the left roller bridge 114-1 with their associated roles a smaller distance from the neutral phases of the cast strand than the opposite roller bridge 114-2 with their associated roles.
  • FIG. 3 the strand guiding device and in particular the adjusting elements are analogous to FIG. 2 hydraulically formed.
  • FIG. 3 a non-inventive symmetrical employment of the roller bridges to the neutral phase of the casting strand shown.
  • FIG. 1 are in FIG. 3
  • the roller bridges 114-1 and 114-2 not parallel to the neutral phase, but with a two-sided angle ⁇ > 0 made to the neutral phase. This is true in FIG. 3 for the immediate downstream of the mold segment; however, in the second segment downstream in the casting direction, the roller bridges 114-1, 114-2 are again arranged parallel to the neutral phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Forging (AREA)

Abstract

A strand guide for a cast strand has a first roller bridge to one wide side of the cast strand and having ends defining two first section corners, a first fixed support adjacent the first roller bridge, a second roller bridge to the opposite wide side of the cast strand and having ends defining two second section corners, and a second fixed support adjacent the second roller bridge. Respective rows of rollers are rotatably mounted on each of the first and second roller bridges for engaging the respective wide sides and thereby supporting and guiding the cast strand. Respective first and second hydraulic positioners connect the first and second corners of the first and second roller bridges to the first and second fixed supports for individual positioning the rollers of the first and second roller bridges symmetrically or asymmetrically relative to the neutral phase of the cast strand.

Description

Technisches GebietTechnical area

Die Erfindung betrifft ein Verfahren dum Betriebene einer Strangführungsvorrichtung zum Stützen und Führen von Gießsträngen innerhalb einer Stranggießanlage, insbesondere für Brammen und Dünnbrammen. Die Erfindung findet grundsätzlich auf alle Arten von Strangführungsvorrichtungen Anwendung, insbesondere auf Vertikal-, Horizontal-, oder Bogen -Anlagen. Genauer gesagt, betrifft die Erfindung die Positionierung bzw. Anstellung von Rollenbrücken innerhalb einer Strangführungsvorrichtung.The invention relates to a method dum enterprises a strand guiding device for supporting and guiding casting strands within a continuous casting plant, in particular for slabs and thin slabs. The invention applies in principle to all types of strand guiding devices, in particular to vertical, horizontal, or sheet systems. More specifically, the invention relates to the positioning of roller bridges within a strand guiding device.

Stand der TechnikState of the art

Strangführungsvorrichtungen mit Rollenbrücken zum Stützen und Führen von Gießsträngen sind im Stand der Technik grundsätzlich bekannt.Strand guiding devices with roller bridges for supporting and guiding casting strands are basically known in the prior art.

Die DE 1 583 620 A1 offenbart eine Vorrichtung zum Behandeln von Gießsträngen durch Walzen, bei welcher Strangführungselemente mit Rollenbrücken vorgesehen sind, die an einer Endseite gelenkig gehalten sind und an der anderen Endseite radial verlagerbar sind, so dass die Rollenbrücken relativ zur neutralen Phase oder auch zu der Mittelachse des Gießstrangs v-förmig anstellbar sind.The DE 1 583 620 A1 discloses a device for treating cast strands by rolling, in which strand guide elements provided with roller bridges are, which are held articulated on one end side and are radially displaceable on the other end side, so that the roller bridges are v-shaped relative to the neutral phase or to the central axis of the cast strand.

Die EP 0 834 364 B1 offenbart eine Vorrichtung für Stranggießanlagen mit einer Strangdickenreduktion, bei welcher gegenüberliegende Rollen vorgesehen sind, wobei die Rollen einer Seite starr angeordnet sind und die Rollen der anderen gegenüberliegenden Seite bezüglich den starren Rollen beaufschlagbar sind. Dabei ist die zur Kokille nächste Rollenbrücke an ihrem der Kokille nächsten Ende gelenkig angebunden, wobei das andere Ende der Rollenbrücke verlagerbar ist. Die dieser ersten Rollenbrücke nachfolgenden Rollenbrücken sind miteinander gekoppelt verbunden und unter Berücksichtigung der Kopplung begrenzt verlagerbar, wobei immer ein Ende einer Rollenbrücke mit einem anderen Ende einer benachbarten Rollenbrücke gemeinsam verlagerbar ist.The EP 0 834 364 B1 discloses an apparatus for continuous casting with a strand thickness reduction, in which opposite rollers are provided, wherein the rollers of one side are rigidly arranged and the rollers of the other opposite side are acted upon with respect to the rigid rollers. In this case, the roller bridge closest to the mold is hinged at its end closest to the mold, the other end of the roller bridge being displaceable. The roller bridges following this first roller bridge are connected to one another in a coupled manner and limitedly displaceable in consideration of the coupling, wherein one end of a roller bridge can always be displaced together with another end of an adjacent roller bridge.

Auch die EP 0 545 104 B1 offenbart eine Vorrichtung zum Stranggießen, wobei die Vorrichtung einen fest angeordneten Rollensatz und einen gegenüber diesem ersten Rollensatz verspannbaren weiteren zweiten Rollensatz aufweist.Also the EP 0 545 104 B1 discloses an apparatus for continuous casting, wherein the device has a fixed roller set and a relative to this first set of rollers can be braced another second roller set.

Im Stand der Technik sind somit entweder Stranggießanlagen bekannt, die eine einseitig feste Anordnung von Rollen aufweisen oder die eine symmetrische Anordnung der Rollen vorsehen, so dass sich ein v-förmiger Rollenspalt ergibt. Dabei ist es nachteilig, dass sich für den Strang aufgrund der einseitig festen Anordnung der Rollen eine feste Geometrie ergibt, da die Festseite ein Bezugspunkt für die Losseite darstellt. Auf der anderen Seite wird bei den symmetrischen v-förmigen Anordnungen ein Rollenspalt aufgrund der fixierten Einlaufanordnung der ersten Rollen vorgesehen und die starre Anordnung der gegenüberliegenden Rollen erlaubt keine beliebige Freiheit bei der Strangführung und der Stranggestaltung.Thus, in the prior art either continuous casting plants are known which have a one-sided fixed arrangement of rollers or which provide a symmetrical arrangement of the rollers, so that a V-shaped roller gap results. It is disadvantageous that results in a fixed geometry for the strand due to the one-sided fixed arrangement of the rollers, since the fixed side is a reference point for the lot side. On the other hand, in the symmetrical V-shaped arrangements, a roller gap is provided due to the fixed inlet arrangement of the first rollers, and the rigid arrangement of the opposed rollers does not allow any freedom in strand guidance and strand design.

Darstellung der Erfindung, Aufgabe, Lösung, Vorteile.Presentation of the invention, object, solution, advantages.

Aufgabe der Erfindung ist es daher, eine Vorrichtung und ein Verfahren zu schaffen, welche es erlauben erlauben, die Strangführung und den Strang flexibler zugestalten.The object of the invention is therefore to provide an apparatus and a method which allow to make the strand guide and the strand more flexible.

Diese Aufgabe wird durch den Gegenstand des Patentanspruchs 1 gelöst. Demnach umfasst die erfindungsgemäß betriebene Strangführungsrichtung insbesondere mindestens ein erstes Einstellelement zum Verbinden der ersten Rollenbrücke mit einem ersten Festland und zum individuellen Positionieren der ersten Rollenbrücke in Bezug auf die neutrale Phase des Gießstrangs und mindestens ein zweites Einstellelement zum Verbinden der zweiten Rollenbrücke mit einem zweiten Festland und zum individuellen Positionieren der zweiten Rollenbrücke in Bezug auf die neutrale Phase des Gießstrangs.This object is solved by the subject matter of patent claim 1. Accordingly, the strand guide device operated according to the invention comprises in particular at least one first adjusting element for connecting the first roller bridge to a first mainland and for individually positioning the first roller bridge with respect to the neutral phase of the casting strand and at least one second adjusting element for connecting the second roller bridge to a second mainland and for individually positioning the second roller bridge with respect to the neutral phase of the casting strand.

Die neutrale Phase im Innern eines noch nicht durcherstarrten Gießstrang beschreibt diejenige fiktive Linie, welche die - jeweils in einem Querschnitt des Strangs gesehen - heißesten Punkte in Längsrichtung des Strangs miteinander verbindet. Sie kann, muss aber - insbesondere bei unsymmetrischer Kühlung - nicht, mit der geometrischen Mittelinie des Strangs zusammenfallen.The neutral phase in the interior of a cast strand that has not yet solidified describes that fictitious line which connects the hottest points in the longitudinal direction of the strand, each viewed in a cross section of the strand. It can, but does not have to coincide with the geometric mean line of the strand, especially in the case of asymmetrical cooling.

Das beanspruchte Verfahren der Erfindung ermöglicht vorteilhafterweise eine Anstellung der beiden Rollenbrücken eines Segments auf beiden Seiten des Gießstrangs unabhängig voneinander in Bezug auf die neutrale Phase des Gießstrangs. Der Bezugspunkt für die Einstellung und Ausrichtung der Strangführung bzw. der Rollenbrücken ist erfindungsgemäß nicht mehr wie im Stand der Technik die Rollenbahn der Festseite, sondern die neutrale Phase des Strangs. Die nunmehr aufgrund der Erfindung mögliche individuelle, d.h. unabhängige Positionierung bzw. Anstellung der Rollenbrücken auf beiden (Breit)Seiten des Gießstrangs in Bezug auf die neutrale Phase des Strangs oder alternativ auf ihre jeweiligen Festlande bildet die Grundlage für eine wesentliche Qualitätsverbesserung beim Strangguss, insbesondere bei der Erzeugung von Brammen. Der Strangguss wird mit der Erfindung verfahrenstechnisch insofern verbessert, als dass er eine individuelle Stützung der Strangschale über die individuell anstellbaren Rollenbahnen ermöglicht, wobei die Stützung unabhängig und flexibel im Hinblick auf einen möglichst optimalen Erstarrungsprozess, aber auch im Hinblick auf eine gewünschte Softreduction und/oder im Hinblick auf durchzuführende Liquid-Core-Reduction erfolgen kann.The claimed method of the invention advantageously enables the two roller bridges of a segment to be set on either side of the cast strand independently of each other with respect to the neutral phase of the cast strand. The reference point for the adjustment and alignment of the strand guide or the roller bridges according to the invention is no longer, as in the prior art, the roller conveyor of the fixed side, but the neutral phase of the strand. The now possible due to the invention individual, ie independent positioning or employment of the roller bridges on both (broad) sides of the casting strand with respect to the neutral phase of the strand or alternatively to their respective Mainland forms the basis for a significant quality improvement in continuous casting, especially in the production of slabs. The continuous casting is improved with the invention procedurally insofar as it allows individual support of the strand shell on the individually engageable roller conveyors, the support independent and flexible in terms of optimum solidification process, but also in terms of a desired Softreduction and / or with regard to liquid core reduction to be carried out.

Gemäß dem Stand der Technik sind die Einstellelemente mechanisch ausgebildet und ermöglichen ein statisches Einstellen der individuellen Position der Rollenbrücken gegenüber der neutralen Phase des Gießstrangs mit Hilfe von Distanzstücken, sogenannten Spacern.According to the prior art, the adjusting elements are mechanically formed and allow a static adjustment of the individual position of the roller bridges with respect to the neutral phase of the cast strand with the aid of spacers, so-called spacers.

Erfindungsgemäß sind die Einstellelemente als Hydraulikelemente ausgebildet. Dies hat den Vorteil, dass dann eine Einstellung bzw. eine Veränderung der Anstellung der Rollenbrücken z. B. auch aus einer entfernt angeordneten Leitwarte heraus während des Betriebs der Strangführungsvorrichtung erfolgen kann.According to the invention, the adjustment elements are designed as hydraulic elements. This has the advantage that then a setting or a change in the employment of the roller bridges z. B. can also be done from a remote control room during operation of the strand guiding device.

Eine besonders stabile Positionierung bzw. Anstellung der Rollenbrücken an den Gießstrang wird erreicht, da die Rollenbrücken mit jeweils vier in ihren jeweiligen Eckbereichen vorgesehenen Einstellelementen positioniert werden. Insbesondere wird so eine Positionierung unter einem bestimmten Winkel α > 0 zur neutralen Phase des Gießstrangs ermöglicht.A particularly stable positioning or adjustment of the roller bridges to the cast strand is achieved because the roller bridges are positioned with four provided in their respective corner areas adjustment. In particular, such a positioning is made possible at a certain angle α> 0 to the neutral phase of the casting strand.

Die jeweils gegenüberliegenden Rollenbrücken sind an jeweils unterschiedlichem Festland befestigt. Vorteilhafterweise handelt es sich bei dem Festland um den Segmentrahmen des Segmentes. Dies ist allerdings keineswegs zwingend; vielmehr kann es sich bei dem Festland auch um ein beliebiges ortsfestes Konstruktionselement der Stranggießanlage oder in der Umgebung der Stranggießanlage, z.B. um eine Wand, handeln.The respective opposite roller bridges are attached to each different mainland. Advantageously, the mainland is the segmental frame of the segment. However, this is by no means mandatory; Rather, the mainland may also be any stationary structural element the continuous casting or in the vicinity of the continuous casting, for example, a wall act.

Darüber hinaus ist als besonderer Vorteil hervorzuheben, dass die erfindungsgemäß betriebene Strangführungseinrichtung eine unsymmetrische Anstellung der Rollenbrücken in Bezug auf die neutrale Phase des Gießstrangs ermöglichen. Bei einer symmetrischen Anstellung, die nicht Gegenstand der beanspruchten Erfindung ist, werden die Rollenbrücken symmetrisch, d.h. mit jeweils gleichem Abstand zur neutralen Phase des Warmstrangs angestellt. Mit einer symmetrischen Anstellung wird dem natürlichen Erstarrungsvorgang - unter der Voraussetzung, dass auch alle weiteren verfahrenstechnischen Vorgänge, wie z. B. die Sekundärkühlung, auf beiden Seiten des Gießstrangs gleich stark erfolgen - Folge geleistet. Die symmetrische Einstellung bzw. Anstellung schließt auch eine symmetrische Anstellung der Rollenbrücken auf beiden Seiten des Gießstrangs unter einem Winkel α > 0 gegen die neutrale Phase des Gießstrangs ausdrücklich mit ein.In addition, it should be emphasized as a particular advantage that the strand guiding device operated according to the invention enable an asymmetrical adjustment of the roller bridges with respect to the neutral phase of the cast strand. In a symmetrical employment, which is not the subject of the claimed invention, the roller bridges become symmetrical, i. each set at the same distance to the neutral phase of the hot strand. With a symmetrical employment is the natural solidification process - under the condition that all other procedural processes, such. B. the secondary cooling, equally strong on both sides of the cast strand - done. The symmetrical adjustment or employment also includes a symmetrical employment of the roller bridges on both sides of the cast strand at an angle α> 0 against the neutral phase of the cast strand explicitly with a.

Die erfindungsgemäße unsymmetrische Anstellung der Rollenbrücken in Bezug auf die neutrale Phase des Gießstranges kann insbesondere während eines Gießbetriebs im Hinblick auf eine optimale Segmentkonizität/Taper, im Hinblick auf eine durchzuführende Liquid-Core-Reduction oder im Hinblick auf eine SoftReduction sinnvoll sein.The inventive asymmetrical employment of the roller bridges with respect to the neutral phase of the cast strand can be useful, in particular, during a casting operation with regard to optimum segment conicity / taper, with regard to a liquid core reduction to be performed or with regard to soft reduction.

Die mit der Erfindung mögliche Veränderung einer unsymmetrischen Anstellung der Rollenbrücken während des laufenden Gießbetriebs ermöglicht eine stets optimale Anpassung der Position der Rollenbrücken an die stahlqualitätsabhängigen und gießgeschwindigkeitsabhängigen Parametereinstellungen für einen aktuellen Gießprozess.The possible with the invention change a non-symmetrical employment of the roller bridges during the ongoing casting operation allows an always optimal adjustment of the position of the roller bridges to the steel quality-dependent and casting speed dependent parameter settings for a current casting process.

Der Erfindung sind insgesamt drei Figuren beigefügt, wobei

Figur 1
eine Stranggießanlage mit einer Strangführungsvorrichtung für die An- stellung der Rollenbrücken, wobei nicht sämtliche Merkmale der Erfin- dung verwirklicht sind;
Figur 2
die Stranggießanlage mit der Strangführungsvorrichtung gemäß einem Ausführungsbeispiel für die Anstellung der Rollenbrücken; und
Figur 3
die Stranggießanlage mit der Strangführungsvorrichtung gemäß dem Ausführungsbeispiel aus Figur 2 für die Anstellung der Rollenbrücken zeigt.
The invention is a total of three figures attached, wherein
FIG. 1
a continuous casting machine with a strand guiding device for the provision of the roller bridges, wherein not all features of the invention are realized;
FIG. 2
the continuous casting with the strand guiding device according to an embodiment for the employment of the roller bridges; and
FIG. 3
the continuous casting with the strand guiding device according to the embodiment FIG. 2 for the employment of the roller bridges shows.

Die Erfindung wird nachfolgend in Form von Ausführungsbeispielen unter Bezugnahme auf Figuren detailliert beschrieben. In allen Figuren sind gleiche technische Elemente mit gleichen Bezugzeichen bezeichnet.The invention will now be described in detail in the form of embodiments with reference to figures. In all figures, the same technical elements are designated by the same reference numerals.

Figur 1 zeigt eine Stranggießanlage mit einer Stranggießkokille 210 und einer Strangführungsvorrichtung 100. Die Strangführungsvorrichtung 100 umfasst zwei Segmente. 110, welche in Stranggießrichtung (Pfeilrichtung) der Kokille 210 sequentiell nachgeordnet sind. Jedes der beiden Segmente 110 umfasst eine erste Rollenbrücke 114-1 auf der einen Breitseite des Gießstrangs und eine zweite Rollenbrücke 114-2 auf der gegenüberliegenden Breitseite des Gießstrangs. Der Gießstrang ist in den Figuren 1 - 3 repräsentiert durch die vertikale strickpunktierte Linie. Jede der beiden Rollenbrücken 114-1, 114-2 umfasst jeweils eine Mehrzahl von Rollen 116-1, 116-2 zum Stützen und Führen des Gießstrangs. Die erste Rollenbrücke 114-1 ist vorzugsweise mit vier Einstellelementen 118 an einem ersten Festland 112-1 variabel positionierbar, d. h. mit veränderlichem Abstand befestigt. Von den vier ersten Einstellelementen sind lediglich zwei in Figur 1 gezeigt und dort mit den Bezugzeichen 118-3 und 118-4 bezeichnet. Analog ist die zweite Rollenbrücke 114-2 mit Hilfe von vorzugsweise vier Einstellelementen an einem zweiten Festland 112-2 variabel positionierbar befestigt; auch von diesen Einstellelementen sind lediglich zwei in Figur 1 gezeigt und dort mit den Bezugzeichen 118-1 und 118-2 bezeichnet. Alle Einstellelemente dienen zum individuellen Positionieren bzw. Anstellen ihrer jeweils zugeordneten Rollenbrücken in Bezug auf die neutrale Phase N des Gießstrangs. FIG. 1 shows a continuous casting plant with a continuous casting mold 210 and a strand guiding device 100. The strand guiding device 100 comprises two segments. 110, which are arranged downstream in the continuous casting direction (arrow direction) of the mold 210 sequentially. Each of the two segments 110 comprises a first roller bridge 114-1 on one broad side of the cast strand and a second roller bridge 114-2 on the opposite broad side of the cast strand. The cast strand is in the Figures 1 - 3 represented by the vertical dotted line. Each of the two roller bridges 114-1, 114-2 each includes a plurality rollers 116-1, 116-2 for supporting and guiding the cast strand. The first roller bridge 114-1 is preferably variably positionable with four adjustment elements 118 on a first mainland 112-1, that is to say fixed at a variable distance. Of the four first setting elements, only two are in FIG. 1 shown and designated by reference numerals 118-3 and 118-4. Analogously, the second roller bridge 114-2 is fastened variably positionable by means of preferably four adjustment elements on a second mainland 112-2; also of these adjustment elements are only two in FIG. 1 shown and designated by reference numerals 118-1 and 118-2. All adjustment elements are used for individually positioning or adjusting their respective associated roller bridges with respect to the neutral phase N of the casting strand.

In Figur 1 sind die Feststellelemente mechanisch ausgebildet. Das heißt, dass die individuelle Anstellung der Rollenbrücken in Bezug auf die neutrale Phase des Gießstrangs mit Hilfe von Distanzstücken 119 erfolgt, welche im Bereich der Einstellelemente zwischen die Rollenbrücken und das jeweilige Festland gelegt werden. Die durch die Distanzstücke definierten Anstellungen bzw. Einstellungen der Rollenbrücken an den Gießstrang sind aufgrund der großen Temperaturen die während des Gießbetriebs in der Nähe der Strangführungsvorrichtung herrschen, während des laufenden Gießbetriebs nicht veränderbar und insofern statisch.In FIG. 1 the locking elements are mechanically formed. That is, the individual adjustment of the roller bridges with respect to the neutral phase of the casting strand by means of spacers 119 which are placed in the region of the adjusting elements between the roller bridges and the respective mainland. The employment defined by the spacers settings or the roller bridges to the cast strand are not changeable due to the high temperatures during the casting operation in the vicinity of the strand guiding device during the ongoing casting operation and thus static.

Die in Figur 1 gezeigte Anstellung der Rollenbrücken 114 in Bezug auf die neutrale Phase N des Gießstrangs ist hier symmetrisch, weil die Abstände der sich jeweils paarweise gegenüberliegenden Rollenbrücken bzw. Einzelrollen jeweils zur neutralen Phase überall betraglich gleich groß sind.In the FIG. 1 shown employment of the roller bridges 114 with respect to the neutral phase N of the casting strand is symmetrical here, because the distances of each pairwise opposite roller bridges or individual roles are equal to the neutral phase everywhere the same size.

Figur 2 unterscheidet sich zum einen von Figur 1 dadurch, dass die Einstellelemente hier gemäß der Erfindung in Form von Hydraulikzylindern 118'-1, ..., 118'-4, ausgebildet sind. Wie bereits erläutert, ermöglicht diese Ausbildung der Einstellelemente auch eine Veränderung der Anstellung der Rollenbrücken während des laufenden Gießbetriebs. Dies ist insbesondere für eine vorzugsweise kontinuierliche Anpassung der Anstellung der Brücken an einen eventuell durch den Abkühlungsprozess bedingten Materialdickenschund beim Gießstrang oder an sonstige Gießparameter wie Stahlqualität und Gießgeschwindigkeit während des laufenden Gießbetriebs vorteilhaft. FIG. 2 differs on the one hand from FIG. 1 in that the adjusting elements are here according to the invention in the form of hydraulic cylinders 118'-1, ..., 118'-4, are formed. As already explained, this design of the adjusting elements also allows a change in the employment of Roller bridges during the ongoing casting operation. This is particularly advantageous for a preferably continuous adjustment of the employment of the bridges to a possibly caused by the cooling process Materialdickenschund the cast strand or other casting parameters such as steel quality and casting speed during the current casting operation.

Weiterhin ist in Figur 2 im Unterschied zu Figur 1 eine unsymmetrische Anstellung der Rollenbrücken an den Gießstrang gezeigt; dies kommt in Figur 2 dadurch zum Ausdruck, dass die linke Rollenbrücke 114-1 mit ihren zugehörigen Rollen einen geringeren Abstand zur neutralen Phasen des Gießstrangs aufweist als die gegenüberliegenden Rollenbrücke 114-2 mit ihren zugehörigen Rollen.Furthermore, in FIG. 2 in contrast to FIG. 1 shown an asymmetrical employment of the roller bridges to the casting strand; this is coming in FIG. 2 characterized in that the left roller bridge 114-1 with their associated roles a smaller distance from the neutral phases of the cast strand than the opposite roller bridge 114-2 with their associated roles.

In Figur 3 sind die Strangführungseinrichtung und insbesondere die Einstellelemente analog zu Figur 2 hydraulisch ausgebildet. Im Unterschied zu Figur 2 ist jedoch in Figur 3 eine nicht erfindungsgemäße symmetrische Anstellung der Rollenbrücken an die neutrale Phase des Gießstrangs gezeigt. Im Unterschied zur Figur 1 sind in Figur 3 die Rollenbrücken 114-1 und 114-2 jedoch nicht parallel zur neutralen Phase, sondern mit einem beidseitigen Winkel α > 0 zur neutralen Phase angestellt. Das gilt in Figur 3 für das der Kokille unmittelbar nachgeschaltete Segment; bei dem in Gießrichtung nachgeschalteten zweiten Segment sind die Rollenbrücken 114-1, 114-2 jedoch wiederum parallel zur neutralen Phase angeordnet. In FIG. 3 the strand guiding device and in particular the adjusting elements are analogous to FIG. 2 hydraulically formed. In contrast to FIG. 2 is however in FIG. 3 a non-inventive symmetrical employment of the roller bridges to the neutral phase of the casting strand shown. In contrast to FIG. 1 are in FIG. 3 However, the roller bridges 114-1 and 114-2 not parallel to the neutral phase, but with a two-sided angle α> 0 made to the neutral phase. This is true in FIG. 3 for the immediate downstream of the mold segment; however, in the second segment downstream in the casting direction, the roller bridges 114-1, 114-2 are again arranged parallel to the neutral phase.

Claims (1)

  1. Method of operating a strip guide device (100) for supporting and guiding a cast strip after leaving a continuous casting mould (210) in a continuous casting plant, with at least one segment, wherein the segment comprises:
    a first roller bridge (114-1) associated with a wide side of the cast strip;
    a second roller bridge (114-2) associated with the opposite wide side of the cast strip,
    wherein at least one roller for supporting and guiding the cast strip is rotatably mounted at each of the first and second roller bridges (114);
    at least one first setting element (118-3, 118-4) for connecting the first roller bridge (114-1) with a first fixed body (112-1) and for individual positioning of the first roller bridge (114-1) with respect to the neutral phase (N) of the cast strip; and
    at least one second setting element (118-1, 118-2) for connecting the second roller bridge (114-2) with a second fixed body (112-2) and for individual positioning of the second roller bridge (114-2) with respect to the neutral phase (N) of the cast strip,
    roller bridges (114-1, 114-2), which are each arranged to be asymmetrically settable with respect to the neutral phase (N) of the cast strip,
    hydraulic elements as setting elements (118), by which the roller bridges (114-1, 114-2) are individually positionable during the continuing casting process, wherein the roller bridges (114-1, 114-2) with in each instance four hydraulic setting elements (118), which are arranged in the respective corner regions thereof and by which the roller bridges (114-1, 114-2) are formed to be individually settable at a defined angle α > 0 with respect to the neutral phase (N) of the cast strip, wherein the method comprises the following steps:
    supporting and guiding the cast strip by individual positioning of the first roller bridge (114-1) with the help of the first setting element (118-3, 118-4) with respect to the neutral phase (N) of the cast strip; and
    individual positioning of the second roller bridge (114-2) with the help of the second setting element (118-1, 118-2) with respect to the neutral phase (N) of the cast strip, wherein the roller bridges are set during the casting operation asymmetrically with respect to the neutral phase of the cast strip in dependence on parameter settings dependent on steel quality and dependent on casting speed.
EP07818622A 2006-10-13 2007-10-02 Method of operating a strand guiding device Not-in-force EP2089172B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006048511A DE102006048511A1 (en) 2006-10-13 2006-10-13 Strand guiding device and method for its operation
PCT/EP2007/008542 WO2008046507A1 (en) 2006-10-13 2007-10-02 Strand guiding device and method of operating it

Publications (2)

Publication Number Publication Date
EP2089172A1 EP2089172A1 (en) 2009-08-19
EP2089172B1 true EP2089172B1 (en) 2011-09-28

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EP07818622A Not-in-force EP2089172B1 (en) 2006-10-13 2007-10-02 Method of operating a strand guiding device

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US (1) US8162033B2 (en)
EP (1) EP2089172B1 (en)
JP (1) JP2010505632A (en)
KR (1) KR20090051764A (en)
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AT (1) ATE526099T1 (en)
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DE (1) DE102006048511A1 (en)
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CN115502352B (en) * 2022-11-17 2023-02-03 德阳宏广智能装备有限责任公司 Casting blank conveying device and continuous casting and rolling production line

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CA2665072A1 (en) 2008-04-24
RU2009117862A (en) 2010-11-20
CA2665072C (en) 2011-12-13
WO2008046507A1 (en) 2008-04-24
US20100032125A1 (en) 2010-02-11
KR20090051764A (en) 2009-05-22
RU2412781C2 (en) 2011-02-27
CN101522340A (en) 2009-09-02
US8162033B2 (en) 2012-04-24
UA96461C2 (en) 2011-11-10
DE102006048511A1 (en) 2008-04-17
ATE526099T1 (en) 2011-10-15
JP2010505632A (en) 2010-02-25
CN101522340B (en) 2012-07-18
EP2089172A1 (en) 2009-08-19

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