EP0080998B1 - Installation for the horizontal continuous casting of metals or alloys - Google Patents

Installation for the horizontal continuous casting of metals or alloys Download PDF

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Publication number
EP0080998B1
EP0080998B1 EP19820890177 EP82890177A EP0080998B1 EP 0080998 B1 EP0080998 B1 EP 0080998B1 EP 19820890177 EP19820890177 EP 19820890177 EP 82890177 A EP82890177 A EP 82890177A EP 0080998 B1 EP0080998 B1 EP 0080998B1
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EP
European Patent Office
Prior art keywords
strand
withdrawal
mold
continuous casting
take
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EP19820890177
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German (de)
French (fr)
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EP0080998A1 (en
Inventor
Manfred Dipl.-Ing. Haissig
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Haissig Manfred Dipl-Ing
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Individual
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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
    • B22D11/14—Plants for continuous casting
    • B22D11/143—Plants for continuous casting for horizontal casting
    • 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
    • B22D11/1284—Horizontal removing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/123—Details of saw blade body

Definitions

  • the invention relates to a device for the horizontal continuous casting of metals or alloys, in particular steels, which has a fixed, cooled sliding mold, optionally connected to this aftercooler and a strand extraction device which can be displaced in the direction of the longitudinal axis of the strand.
  • C-2 340 636 a device for the horizontal continuous casting of metals or alloys, in particular steels, which has a fixed, cooled sliding mold, optionally connected to this aftercooler and a strand extraction device which can be displaced in the direction of the longitudinal axis of the strand.
  • the strand which has not yet fully solidified in the casting mold is pulled out of the mold by means of the strand withdrawal device.
  • the strand is advantageously withdrawn step by step.
  • Exact strand withdrawal is achieved today primarily by means of drive rollers or pairs of drive rollers which act directly on the strand. Driving rollers ensure constant contact between the strand and the take-off device, which ensures an exact strand withdrawal.
  • the strand In the continuous casting process, while the metal strand to be cast is subjected to shaping in the mold after leaving the melt container and possibly a cooling process in aftercoolers, the strand continuously cools and the thickness of the strand skin increases.
  • phase transformations can also occur during the cooling and progressive solidification of the strand, also different from metal to metal or from alloy to alloy, during which, apart from the usually occurring shortening of the strand, possibly also Dimensional consistency can occur despite cooling.
  • DE-C-1583611 describes a strand pull-off device in which the frame carrying the driving rollers is pushed back and forth in the strand axis direction during the strand pull-off process.
  • a strand withdrawal stand which is also oscillating in the strand axis direction, but is equipped with clamping jaws, is also provided in the device described in AT-B-277 489.
  • the reversal points of the oscillating movement of the scaffold or of the strand withdrawal elements are constantly predefined, that is to say the first detection of the strand by the strand withdrawal elements takes place constantly at the same point with each back and forth movement.
  • the take-off device is designed to be movable and moves during the removal, a pulling off of the strand which is individually tailored to the metal or alloy to be cast and its specific behavior during the cooling process can take place exactly at the point at which the Strand skin is already strong enough to rule out a possible strand break or the like.
  • the aim of the invention is to provide a device for horizontal continuous casting, which makes it possible to set the location of the attack on the strand take-off precisely on the metal or alloy to be cast, and possibly also on the cross-sectional dimension of the strand, and on these How to exactly take into account its individual behavior and properties during the controlled cooling in the aftercooler and especially when cooling on the way after leaving the mold and aftercooler.
  • the invention relates to a device for the horizontal continuous casting of metals and alloys, in particular steels, which has a fixed, cooled slide mold, optionally connected to this aftercooler and a strand extraction device which can be displaced in the direction of the longitudinal axis of the strand, and is characterized in that the strand take-off stand for setting a desired, constant distance between the location of the exit of the strand from the mold or from the aftercooler and the strand take-off element which detects the strand, in particular a pair of drive rollers, is displaceable into the corresponding position and can be ascertained there, and, if appropriate, that Strand take-off device, in particular the driven drive roller of the pair of drive rollers, on the longitudinally displaceable take-off frame, on which the horizontally guided strand rests, is designed to be height-adjustable transversely to the strand take-off direction.
  • the inventive longitudinal displaceability of the fume cupboard to both sides and lockability enable the system to be set in a targeted manner to the “metallurgical length of the strand that has been drawn off, that is, the path of the strand that it has to go through after leaving the mold or the aftercooler , before it is caught safely by the strand withdrawal elements on the scaffold.
  • the practical embodiments of the longitudinally displaceable arrangement of the strand take-off stand have no limits; This is usually mounted on rails via wheels or rollers.
  • a particular advantage of the invention consists in the fact that each already existing extraction device in use only needs to be supplemented, and the described improvement in the strand production can be achieved with this less complex measure.
  • the adjustment of the position of the fume cupboard to the previously described distance from the end of the aftercooler can be carried out, for example, by means of a screw drive, which is advantageously driven by a, preferably step-by-step, DC motor.
  • a stepper motor can be operated via a central control unit, e.g. B. a microprocessor, easily control according to a predetermined program, making a simple and very low demands on the operating personnel, each matched to the metal to be cast and the strand dimension, very exact setting of the "metallurgical length on the strand, that is, the distance from that location , where the strand withdrawal device or the strand withdrawal member acts on the strand without impairing it and the place where the strand leaves the mold or the aftercooler is reached.
  • the height adjustment of the strand take-off elements can be carried out, for example, by means of a screw drive, as can the longitudinal displacement of the frame.
  • the drive for this can advantageously also take place with a, preferably step-by-step, DC motor.
  • the height adjustability of the extraction elements of the longitudinally displaceable extraction scaffold is also important if strands of different cross-sectional dimensions are to be produced on one and the same installation, and the height of the bottom of the strand due to the use of molds and aftercoolers of different cross-sectional dimensions.
  • the height of the pull-out can be optimally adjusted to the cross-sectional dimension of the strand currently being cast, so that when the strand enters the take-off elements, in particular driving rollers, the strand lies optimally without bending and thus also Extensive constancy in the transmission of the forces of the take-off element, in particular the drive rollers, can be achieved on the strand to be drawn off.
  • a the exactness of the strand withdrawal process increasing, favorable design of the device, which is particularly suitable for an oscillating strand withdrawal, consists in the fact that the withdrawal elements are formed by pairs of drive rollers, with at least one drive roller on the longitudinally displaceable trigger frame in a known manner either directly on the axis of the arranged driving motor, or is directly coupled to it, a step-by-step direct current motor being preferred as the motor.
  • the continuous casting installation according to FIGS. 1 and 2 is formed from the melt distributor 1 located on the distribution carriage, above which the ladle carriage with the ladle 2 for loading the distributor is located in the illustration.
  • the metal to be cast reaches the horizontal mold 3, also mounted on a carriage, in which the strand is shaped and cooled.
  • the strand which has a solidified strand skin and a molten core, is guided through the stirring coils 4, which are also mounted on trolleys and which induce inductive circulation of the liquid strand core, and is then designed and displaceable by the take-off member or the take-off members of the roller, which is mounted on rolls each individually detected on the metal to be cast in its distance from the end of the mold and in the corresponding position lock strand 5.
  • FIG. 1 another position of the displaceably designed trigger frame 5 is indicated in FIG. 1, in which this z. B. is brought when the metal to be cast tends to delay strand formation and at a position closer to the mold 3 damage to the strand could not be completely excluded.
  • the individual control of the individual parts of the continuous casting system such as. B. the opening of the mold inlet slide as a function of the height of the melt in the distributor 1, the cooling of the mold 3, the position and loading of the stirring coils 4, the respective position of the strand take-off stand 5, the position height of the drive rollers 5a on the stand, the control of their drive unit, the control of the position of the scissors 6 and their function and finally that of the removal of the cut material via the rollers 7 and 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Sawing (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum horizontalen Stranggießen von Metallen oder Legierungen, insbesondere von Stählen, welche eine feststehende, gekühlte Gleitkokille, sich an diese gegebenenfalls anschließende Nachkühler und eine, in Richtung der Längsachse des Stranges verschiebbare Strangabzugseinrichtung aufweist, man vergleiche zum Beispiel die DE-C-2 340 636.The invention relates to a device for the horizontal continuous casting of metals or alloys, in particular steels, which has a fixed, cooled sliding mold, optionally connected to this aftercooler and a strand extraction device which can be displaced in the direction of the longitudinal axis of the strand. C-2 340 636.

Beim horizontalen Stranggießen von Metallen wird der in der Gieß-Kokille gebildete, noch nicht vollständig verfestigte Strang mittels der Strangabzugseinrichtung aus der Kokille gezogen. Insbesondere bei höher schmelzenden Legierungen, wie beispielsweise Stählen, erfolgt der Strangabzug vorteilhaft schrittweise. Durch Einhalten von Pausen zwischen den einzelnen Schritten oder ein Zurückschieben des Stranges, wird die bei der Abkühlung auftretende Kontraktion kompensiert, Wärmerisse werden vermieden und es wird ein festes Verschweißen der einzelnen, jeweils gebildeten Stranghautabschnitte in der Kokille erreicht.In the case of horizontal continuous casting of metals, the strand which has not yet fully solidified in the casting mold is pulled out of the mold by means of the strand withdrawal device. In particular in the case of higher-melting alloys, such as steels, the strand is advantageously withdrawn step by step. By keeping pauses between the individual steps or pushing the strand back, the contraction that occurs during cooling is compensated for, heat cracks are avoided and the individual, each formed strand skin sections are firmly welded in the mold.

Bei Strangabzugseinrichtungen sind grundsätzlich zwei verschiedene Anordnungen bekannt. Eine heute weniger gebräuchliche Anordnung weist Greifbacken auf, die den Strang erfassen und diesen in jeweils gewünschter Weise bewegen. Diese Art des Antriebes-ist nicht ganz exakt, da die relativ großen Massen der Backen bewegt werden müssen, so daß entsprechend dimensionierte, relativ großes Spiel aufweisende Getriebe zum Einsatz kommen müssen. Außerdem besteht die Gefahr einer Beschädigung der Strangoberfläche.Two different arrangements are known in principle for strand pull-off devices. An arrangement that is less common today has gripping jaws that grip the strand and move it in the desired manner. This type of drive is not exactly exact, since the relatively large masses of the jaws have to be moved, so that appropriately dimensioned, relatively large gears must be used. There is also a risk of damaging the strand surface.

Ein exakter Strangabzug wird heute vornehmlich mittels Treibrollen bzw. Treibrollenpaaren, die an den Strang direkt angreifen, erreicht. Treibrollen gewährleisten einen ständigen Kontakt zwischen Strang und Abzugseinrichtung, wodurch ein exakter Strangabzug sichergestellt wird.Exact strand withdrawal is achieved today primarily by means of drive rollers or pairs of drive rollers which act directly on the strand. Driving rollers ensure constant contact between the strand and the take-off device, which ensures an exact strand withdrawal.

Es existiert eine große Anzahl von Druckschriften, in weichen Horizontalstrangguß-Vorrichtungen beschrieben sind, sowie weiters von solchen, welche Strangabzugseinrichtungen betreffen, es seien nur stellvertretend die DE-C-15 83 611 und 23 40 636 erwähnt.There is a large number of publications which are described in soft horizontal continuous casting devices, as well as those which relate to strand withdrawal devices, DE-C-15 83 611 and 23 40 636 should only be mentioned as a representative.

Beim Stranggieß-Vorgang tritt, während der zu gießende Metallstrang nach Verlassen des Schmelzebehälters der Formgebung in der Kokille und eventuell einem Kühlvorgang in Nachkühlern unterworfen wird, eine fortschreitende Abkühlung des Stranges und eine Zunahme der Dicke der Stranghaut ein.In the continuous casting process, while the metal strand to be cast is subjected to shaping in the mold after leaving the melt container and possibly a cooling process in aftercoolers, the strand continuously cools and the thickness of the strand skin increases.

Nachdem der Gießstrang die Kokille bzw. eventuelle Nachkühler verlassen hat und bevor er von den Strangabzugsorganen, insbesondere den Treibrollen, der Strangabzugseinrichtungen erfaßt wird, tritt eine weitere Abkühlung ein. Je nach Schrumpfungs- bzw. Ausdehnungsverhalten des Metalles bzw. der Legierung treten auch auf dieser Wegstrecke Dimensionsänderungen auf, die sich besonders in der Längsrichtung des Stranges bemerkbar machen. Neben diesen Längenänderungen kann es während des Abkühlens und fortschreitenden Erstarrens des Stranges, ebenfalls von Metall zu Metall bzw. von Legierung zu Legierung verschieden, innerhalb der schon verfestigten Stranghaut zu Phasenumwandlungen kommen, während denen, abgesehen von der üblicherweise eintretenden Verkürzung des Stranges, gegebenenfalls auch Dimensionskonstanz trotz Abkühlens auftreten kann.After the casting strand has left the mold or any aftercoolers and before it is caught by the strand withdrawal elements, in particular the drive rollers, of the strand withdrawal devices, further cooling occurs. Depending on the shrinkage or expansion behavior of the metal or the alloy, dimensional changes also occur over this distance, which are particularly noticeable in the longitudinal direction of the strand. In addition to these changes in length, phase transformations can also occur during the cooling and progressive solidification of the strand, also different from metal to metal or from alloy to alloy, during which, apart from the usually occurring shortening of the strand, possibly also Dimensional consistency can occur despite cooling.

In der schon oben erwähnten DE-C-1583611 ist eine Strangabzugseinrichtung beschrieben, bei welcher das die Treibrollen tragende Gerüst während des Strangabziehvorganges in Strangachsrichtung hin- und hergeschoben wird. Ein ebenfalls in Strangachsrichtung oszillierend bewegliches, allerdings mit Klemmbacken ausgerüstetes Strangabzugsgerüst ist auch bei der in der AT-B-277 489 beschriebenen Vorrichtung vorgesehen. Bei diesen beiden Vorrichtungen sind die Umkehrpunkte der oszillierenden Bewegung des Gerüstes bzw. der Strangabzugsorgane konstant vorgegeben, es findet also bei jeder Hin-und Herbewegung jeweils konstant an der gleichen Stelle das erste Erfassen des Stranges durch die Strangabzugsorgane statt.DE-C-1583611, already mentioned above, describes a strand pull-off device in which the frame carrying the driving rollers is pushed back and forth in the strand axis direction during the strand pull-off process. A strand withdrawal stand, which is also oscillating in the strand axis direction, but is equipped with clamping jaws, is also provided in the device described in AT-B-277 489. In these two devices, the reversal points of the oscillating movement of the scaffold or of the strand withdrawal elements are constantly predefined, that is to say the first detection of the strand by the strand withdrawal elements takes place constantly at the same point with each back and forth movement.

Dadurch kann, obwohl die Abzugseinrichtung beweglich ausgebildet ist, und sich während des Abziehens bewegt, ein individuell auf das gerade zu vergießende Metall bzw. auf die zu vergießende Legierung und deren spezifisches Verhalten beim Abkühlungsprozeß ausgerichtetes Abziehen des Stranges genau an jener Stelle, an der die Stranghaut schon stark genug ist, um einen eventuellen Strangbruch od. dgl. auszuschließen, nicht erfolgen.As a result, even though the take-off device is designed to be movable and moves during the removal, a pulling off of the strand which is individually tailored to the metal or alloy to be cast and its specific behavior during the cooling process can take place exactly at the point at which the Strand skin is already strong enough to rule out a possible strand break or the like.

Da diese Stelle von Metall zu Metall und bei gleichbleidendem Metall auch je nach Querschnittsdimension des abgezogenen Stranges verschieden ist, ist es aus Sicherheitsgründen, um Beschädigungen des Stranges oder den Betriebsablauf störende Brüche od. dgl. zu vermeiden, notwendig, den oben genannten Abstand zwischen als erstes am Strang angreifendem Strangabzugsorgan und Kokillen-bzw. Nachkühler-Ende größer zu halten als es an sich aufgrund der jeweiligen « metallurgischen Länge », Sumpftiefe od. dgl. notwendig wäre. Es ist also auch bei den Anlagen mit oszillierendem Gerüst gemäß dem Stand der Technik eine individuelle Einstellung des Ortes, an dem der Strangabzug stattfindet, nicht vorgesehen.Since this point differs from metal to metal and with the same metal depending on the cross-sectional dimension of the drawn-off strand, it is necessary for safety reasons to avoid damage to the strand or breakages or the like that disrupt the operation, the above-mentioned distance between as first strand pulling element acting on the strand and mold or. To keep the aftercooler end larger than would be necessary due to the respective “metallurgical length”, sump depth or the like. Thus, even in the case of systems with an oscillating scaffold according to the prior art, an individual setting of the location at which the strand withdrawal takes place is not provided.

Ziel der Erfindung ist die Schaffung einer Vorrichtung zum horizontalen Stranggießen, die es gestattet, den Ort des Angriffes des Strangabzuges präzise auf das jeweils gerade zu vergießende Metall bzw. die zu vergießende Legierung und gegebenenfalls auch auf die Querschnitts-Dimension des Stranges einzustellen, und auf diese Weise dessen bzw. deren individuelle(s) Verhalten und Eigenschaften während des kontrollierten Abkühlens im Nachkühler und insbesondere auch beim Abkühlen auf dem Weg nach dem Verlassen von Kokille und Nachkühler exakt zu berücksichtigen.The aim of the invention is to provide a device for horizontal continuous casting, which makes it possible to set the location of the attack on the strand take-off precisely on the metal or alloy to be cast, and possibly also on the cross-sectional dimension of the strand, and on these How to exactly take into account its individual behavior and properties during the controlled cooling in the aftercooler and especially when cooling on the way after leaving the mold and aftercooler.

Gegenstand der Erfindung ist eine Vorrichtung zum horizontalen Stranggießen von Metallen und Legierungen, insbesondere von Stählen, welche eine feststehende, gekühlte Gleitkokille, sich an diese gegebenenfalls anschließende Nachkühler und eine, in Richtung der Längsachse des Stranges verschiebbare Strangabzugseinrichtung aufweist, und dadurch gekennzeichnet ist, daß das Strangabzugsgerüst zur Einstellung eines jeweils gewünschten, konstanten Abstandes zwischen dem Ort des Austrittes des Stranges aus der Kokille bzw. aus dem Nachkühler und dem den Strang erfassenden Strangabzugsorgan, insbesondere Treibrollenpaar, in die entsprechende Position verschiebbar und dort feststellbar ausgebildet ist, und daß gegebenenfalls das Strangabzugsorgan, insbesondere die angetriebene Treibrolle des Treibrollenpaares, am längsverschieblich ausgebildeten Abzugsgerüst, auf welcher der horizontal geführte Strang aufliegt, quer zur Strangabzugsrichtung höhenverstellbar ausgebildet ist.The invention relates to a device for the horizontal continuous casting of metals and alloys, in particular steels, which has a fixed, cooled slide mold, optionally connected to this aftercooler and a strand extraction device which can be displaced in the direction of the longitudinal axis of the strand, and is characterized in that the strand take-off stand for setting a desired, constant distance between the location of the exit of the strand from the mold or from the aftercooler and the strand take-off element which detects the strand, in particular a pair of drive rollers, is displaceable into the corresponding position and can be ascertained there, and, if appropriate, that Strand take-off device, in particular the driven drive roller of the pair of drive rollers, on the longitudinally displaceable take-off frame, on which the horizontally guided strand rests, is designed to be height-adjustable transversely to the strand take-off direction.

Die erfindungsgemäß vorgesehene Längs-Verschiebbarkeit des Abzugsgerüstes nach beiden Seiten und Feststellbarkeit ermöglichen die jeweils gezielte Einstellung der Anlage auf die « metallurgische Länge des jeweils abgezogenen Stranges, also jenes Weges des Stranges, den dieser nach dem Verlassen der Kokille bzw. der Nachkühler zu durchlaufen hat, bevor er ohne Gefahr von den Strangabzugsorganen am Gerüst erfaßt wird.The inventive longitudinal displaceability of the fume cupboard to both sides and lockability enable the system to be set in a targeted manner to the “metallurgical length of the strand that has been drawn off, that is, the path of the strand that it has to go through after leaving the mold or the aftercooler , before it is caught safely by the strand withdrawal elements on the scaffold.

Den praktischen Ausführungsformen der längsverschiebbaren Anordnung des Strangabzugsgerüstes sind keine Grenzen gesetzt ; üblicherweise ist diese über Räder oder Rollen auf Schienen gelagert. Ein besonderer Vorteil der Erfindung besteht darin, daß jede schon bestehende, in Verwendung stehende Abzugseinrichtung nur ergänzt zu werden braucht, und mit dieser wenig aufwendigen Maßnahme die beschriebene Verbesserung bei der Strangherstellung erreicht werden kann.The practical embodiments of the longitudinally displaceable arrangement of the strand take-off stand have no limits; This is usually mounted on rails via wheels or rollers. A particular advantage of the invention consists in the fact that each already existing extraction device in use only needs to be supplemented, and the described improvement in the strand production can be achieved with this less complex measure.

Das Einstellen der Position des Abzugsgerüstes jeweils auf den vorher beschriebenen Abstand vom Ende des Nachkühlers kann beispielsweise mittels eines Schraubentriebes erfolgen, der vorteilhaft von einem, vorzugsweise schrittweise arbeitenden, Gleichstrommotor angetrieben wird. Ein derartiger Schrittmotor läßt sich über ein zentrales Steuergerät, z. B. einen Mikroprozessor, entsprechend einem vorgegebenen Programm leicht steuern, wodurch eine einfache und an das Bedienungspersonal nur geringe Anforderungen stellende, auf das zu vergießende Metall und die Strangdimension jeweils abgestimmte, sehr exakte Einstellung der « metallurgischen Länge am Strang, also des Abstandes jenes Ortes, wo die Strangabzugseinrichtung bzw. deren Strangabzugsorgan am Strang ohne dessen Beeinträchtigung angreift und dem Ort, an dem der Strang die Kokille oder den Nachkühler verläßt erreicht wird.The adjustment of the position of the fume cupboard to the previously described distance from the end of the aftercooler can be carried out, for example, by means of a screw drive, which is advantageously driven by a, preferably step-by-step, DC motor. Such a stepper motor can be operated via a central control unit, e.g. B. a microprocessor, easily control according to a predetermined program, making a simple and very low demands on the operating personnel, each matched to the metal to be cast and the strand dimension, very exact setting of the "metallurgical length on the strand, that is, the distance from that location , where the strand withdrawal device or the strand withdrawal member acts on the strand without impairing it and the place where the strand leaves the mold or the aftercooler is reached.

Die erfindungsgemäß bevorzugt vorgesehene Höhenverstellbarkeit der Strangabzugsorgane kann ebenso wie die Längsverschiebung des Gerüstes beispielsweise mittels Schraubentriebes erfolgen. Der Antrieb dafür kann vorteilhaft ebenfalls mit einem, vorzugsweise schrittweise arbeitenden, Gleichstrommotor erfolgen.The height adjustment of the strand take-off elements, which is preferably provided according to the invention, can be carried out, for example, by means of a screw drive, as can the longitudinal displacement of the frame. The drive for this can advantageously also take place with a, preferably step-by-step, DC motor.

Durch das Vorsehen einer Höhenverstellbarkeit der Strangabzugsorgane, auf welchen der Strang aufliegt, kann nicht nur eine auf das Verhalten des Metalles bzw. der Legierung in Längsrichtung des erstarrenden Stranges abgestimmte, exakte Einstellung des Ortes des Strangabzuges erfolgen, es können damit Vorgänge, welche Dimensionsänderungen in der Dicke des abgezogenen Stranges, also quer zur Strangachse, hervorrufen, Berücksichtigung finden.By providing a height adjustment of the strand withdrawal elements on which the strand rests, not only can the location of the strand withdrawal be adjusted precisely to the behavior of the metal or alloy in the longitudinal direction of the solidifying strand, it can also be used to determine processes which change dimensions in the thickness of the stripped strand, that is to say transversely to the strand axis, be taken into account.

Die Höhenverstellbarkeit der Abzugsorgane des längsverschieblich ausgebildeten Abzugsgerüstes hat weiters Bedeutung, wenn auf ein und derselben Anlage Stränge unterschiedlicher Querschnittsdimensionen hergestellt werden sollen, und dabei die Strangunterseite, bedingt durch die Anwendung von Kokillen und Nachkühlern unterschiedlicher Querschnitts-Dimensionen, in ihrer Höhenlage variiert.The height adjustability of the extraction elements of the longitudinally displaceable extraction scaffold is also important if strands of different cross-sectional dimensions are to be produced on one and the same installation, and the height of the bottom of the strand due to the use of molds and aftercoolers of different cross-sectional dimensions.

Durch die Höhenverstellbarkeit der Strangabzugsorgane läßt sich ein optimal an die Querschnittsdimension des gerade im Guß befindlichen Stranges in seiner Höhe exakt angepaßtes Ausziehen erzielen, so daß beim Einlaufen des Stranges in die Abzugsorgane, insbesondere Treibrollen, ein optimales Aufliegen des Stranges ohne Verbiegung und damit auch eine weitgehende Konstanz bei der Übertragung der Kräfte des Abzugsorganes, insbesondere der Treibrollen, auf den abzuziehenden Strang erreicht werden.Due to the height adjustment of the strand take-off elements, the height of the pull-out can be optimally adjusted to the cross-sectional dimension of the strand currently being cast, so that when the strand enters the take-off elements, in particular driving rollers, the strand lies optimally without bending and thus also Extensive constancy in the transmission of the forces of the take-off element, in particular the drive rollers, can be achieved on the strand to be drawn off.

Eine die Exaktheit des Strangabzugsvorganges steigernde, günstige Ausgestaltung der Vorrichtung, die sich besonders für einen oszillierenden Strangabzug eignet, besteht darin, daß die Abzugsorgane durch Treibrollenpaare gebildet sind, wobei mindestens eine Treibrolle am längsverschieblichen Abzugsgerüst in an sich bekannter Weise entweder direkt auf der Achse des sie antreibenden Motors angeordnet, bzw. an diese direkt angekuppelt ist, wobei als Motor ein Schrittweise arbeitender Gleichstrommotor bevorzugt ist.A the exactness of the strand withdrawal process increasing, favorable design of the device, which is particularly suitable for an oscillating strand withdrawal, consists in the fact that the withdrawal elements are formed by pairs of drive rollers, with at least one drive roller on the longitudinally displaceable trigger frame in a known manner either directly on the axis of the arranged driving motor, or is directly coupled to it, a step-by-step direct current motor being preferred as the motor.

Auf diese Weise kann nicht nur die Einstellung des auf das jeweilige Verhalten des gerade zu verarbeitenden Metalles beim Erstarren des Stranges abzustimmenden Abstandes des Angriffspunktes des Strangabzugsorganes vom Kühlerende erfolgen, sondern auch eine exakte, schlupffreie Steuerung des Strangabziehvorganges selbst. Daneben zeichnet sich diese Anordnung durch einen mechanisch einfachen Aufbau aus. Infolge des direkten Zusammenhanges zwischen Drehwinkel des Motors und Bewegungsstrecke des Stranges lassen sich Regeleingriffe sehr exakt und stets reproduzierbar durchführen, wodurch sehr leicht auch in ihrem Mikro-Ablauf schwierige Schrittfolgen exakt durchfürbar sind.In this way, not only can the setting of the distance of the point of application of the extrusion element from the cooler end to be matched to the respective behavior of the metal to be processed when the strand solidifies, but also an exact, slip-free control of the extrusion process itself. This arrangement is also characterized by a mechanically simple structure. As a result of the direct relationship between the angle of rotation of the motor and Control interventions of the line can be carried out very precisely and always reproducibly, which means that difficult step sequences can be carried out very easily, even in their micro-sequence.

Im folgenden wird die Erfindung an Hand der Zeichnungen näher erläutert.The invention is explained in more detail below with reference to the drawings.

Es zeigen :

  • Figur 1 eine erfindungsgemäße Stranggußanlage in Seitenansicht,
  • Figur 2 die gleiche Anlage im Grundriß.
Show it :
  • FIG. 1 is a side view of a continuous casting installation according to the invention,
  • Figure 2 shows the same system in plan.

Die Stranggußanlage gemäß Fig. 1 und 2 ist gebildet aus dem auf dem Verteilerwagen befindlichen Schmelzenverteiler 1, über welchem sich in der Darstellung der Pfannenwagen mit der Pfanne 2 zur Beschickung des Verteilers befindet. Vom Verteiler gelangt das zu vergießende Metall in die horizontale, ebenfalls auf einem Wagen montierte Kokille 3, in welcher Formgebung und Abkühlung des Stranges erfolgen. Der eine erstarrte Stranghaut und einen schmelzflüssigen Kern aufweisende Strang wird durch die ebenfalls auf Wagen montierten Rührspulen 4, die ein induktives Umwälzen des flüssigen Strangkernes bewirken, geführt und wird danach von dem Abzugsorgan bzw. den Abzugsorganen des auf Rollen gelagerten, in Stranglängsrichtung verschiebbar ausgebildeten und jeweils individuell auf das gerade zu vergießende Metall in seinem Abstand vom Ende der Kokille einstellbaren und in der entsprechenden Position feststellbaren Strangabzugsgerüst 5 erfaßt. In strichpunktierter Form ist in der Fig. 1 eine andere Stellung des verschiebbar ausgebildeten Abzugsgerüstes 5 angedeutet, in welche dieses z. B. dann gebracht wird, wenn das zu vergießende Metall zu verzögerter Stranghautbildung neigt und bei einer Stellung näher zur Kokille 3 eine Beschädigung des Stranges nicht ganz auszuschließen wäre.The continuous casting installation according to FIGS. 1 and 2 is formed from the melt distributor 1 located on the distribution carriage, above which the ladle carriage with the ladle 2 for loading the distributor is located in the illustration. From the distributor, the metal to be cast reaches the horizontal mold 3, also mounted on a carriage, in which the strand is shaped and cooled. The strand, which has a solidified strand skin and a molten core, is guided through the stirring coils 4, which are also mounted on trolleys and which induce inductive circulation of the liquid strand core, and is then designed and displaceable by the take-off member or the take-off members of the roller, which is mounted on rolls each individually detected on the metal to be cast in its distance from the end of the mold and in the corresponding position lock strand 5. In dash-dotted form, another position of the displaceably designed trigger frame 5 is indicated in FIG. 1, in which this z. B. is brought when the metal to be cast tends to delay strand formation and at a position closer to the mold 3 damage to the strand could not be completely excluded.

In Bewegungsrichtung des Gießstranges folgt nach dem verschiebbar ausgebildeten Gerüst 5, welches die Treibrollen 5a für den Strangabzug trägt, eine Strangschneideeinrichtung, in der Figur eine hydraulische Schere 6, die ebenfalls längsverschieblich ausgebildet ist, sodaß in Abhängigkeit von der jeweiligen Stellung des Strangabzugsgerüstes 5, dessen Strangabzugsorgane 5a beispielsweise direkt mit einem schrittweise arbeitenden Gleichstrommotor gekuppelt sind, die Schere 6 im gewünschten Abstand davon angeordnet werden kann. Schließlich folgen noch eine Reihe von Stützrollen 8 und Treibrollen 7, welche die Strangstücke über ein Kühlbett 9 und eine Sammelmulde 10 abtransportieren. Vom Steuerhaus 11 in Fig. 2 aus, in welchem beispielsweise mehrere Speicher für Ablaufprogramme und ein zentraler Mikroprozessor untergebracht sein können, erfolgen die individuelle Steuerung der einzelnen Teile der Stranggußanlage, wie z. B. die Öffnung des Kokilleneinlaß-Schiebers in Abhängigkeit von der Höhe der Schmelze im Verteiler 1, die Kühlung der Kokille 3, die Stellung und Beaufschlagung der Rührspulen 4, die jeweilige Position des Strang-Abzugsgerüstes 5, die Lagehöhe der Treibrollen 5a am Gerüst, die Steuerung von deren Antriebsaggregat, die Steuerung der Stellung der Schere 6 und deren Funktion sowie schließlich jene des Abtransportes des abgelängten Materials über die Rollen 7 und 8.In the direction of movement of the casting strand, after the displaceably designed stand 5, which carries the drive rollers 5a for the strand take-off, there is a strand cutting device, in the figure a hydraulic shear 6, which is also designed to be longitudinally displaceable, so that depending on the respective position of the strand take-off stand 5, the latter Extraction elements 5a are, for example, directly coupled to a step-by-step DC motor, the scissors 6 can be arranged at the desired distance therefrom. Finally, a series of support rollers 8 and drive rollers 7 follow, which transport the strand pieces away via a cooling bed 9 and a collecting trough 10. From the wheelhouse 11 in Fig. 2, in which, for example, several memories for sequence programs and a central microprocessor can be accommodated, the individual control of the individual parts of the continuous casting system, such as. B. the opening of the mold inlet slide as a function of the height of the melt in the distributor 1, the cooling of the mold 3, the position and loading of the stirring coils 4, the respective position of the strand take-off stand 5, the position height of the drive rollers 5a on the stand, the control of their drive unit, the control of the position of the scissors 6 and their function and finally that of the removal of the cut material via the rollers 7 and 8.

Claims (2)

1. Apparatus for horizontal continuous casting of metals or alloys, particularly steels, comprising a stationary cooled sliding mold (3), optional aftercoolers connected downstream thereof, and a strand withdrawal device (5) displaceable into the direction of the longitudinal axis of the strand, characterized in that the strand withdrawal frame (5) is capable of being displaced to a position and can be fixed there in order to adjust any desired constant spacing between the point of the emergence of the strand from the mold (3) or the aftercooler, respectively, and the strand withdrawal device seizing the strand, in particular the pair of drive rollers (5a), and that, if desired, the strand withdrawal device, in particular the driven drive roll of the pair of drive rolls (5a) is adjustable in height transversely to the direction of the strand at the longitudinally displaceable withdrawal frame (5) by which the horizontally guided strand is supported.
2. Apparatus according to claim 1, characterized in that at least one drive roll (5a) is driven by a DC stepping motor whereby the motor and the drive roll have, in a manner known per se, a common shaft or whereby each of their shafts are directly coupled with each other.
EP19820890177 1981-11-27 1982-11-26 Installation for the horizontal continuous casting of metals or alloys Expired EP0080998B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT5110/81 1981-11-27
AT511081A AT373179B (en) 1981-11-27 1981-11-27 DEVICE FOR HORIZONTAL CONTINUOUS CASTING OF METALS OR ALLOYS

Publications (2)

Publication Number Publication Date
EP0080998A1 EP0080998A1 (en) 1983-06-08
EP0080998B1 true EP0080998B1 (en) 1985-08-28

Family

ID=3572042

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Application Number Title Priority Date Filing Date
EP19820890177 Expired EP0080998B1 (en) 1981-11-27 1982-11-26 Installation for the horizontal continuous casting of metals or alloys

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EP (1) EP0080998B1 (en)
JP (1) JPS5893542A (en)
AT (1) AT373179B (en)
DE (2) DE8219586U1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR8704939A (en) * 1986-09-29 1988-05-17 Steel Casting Eng Ltd PERFECTED TIGER SCISSORS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395479A (en) * 1964-05-25 1965-04-09 Method and device for the horizontal casting of metals
GB1178981A (en) * 1966-02-15 1970-01-28 Campbell Gifford & Morton Ltd Improvements relating to the continuous casting of metals
DE1583611C3 (en) * 1967-09-29 1974-08-15 Demag-Elektrometallurgie Gmbh, 4100 Duisburg Device for intermittently conveying a metallic cast strand
DE2340636C3 (en) * 1973-08-10 1980-04-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for the step-by-step extraction of a strand from a horizontal continuous casting mold
FR2374984A1 (en) * 1976-12-22 1978-07-21 Uk Nii Metallov HORIZONTAL MACHINE FOR THE CONTINUOUS CASTING OF METALS AND ALLOYS

Also Published As

Publication number Publication date
JPS5893542A (en) 1983-06-03
DE3265902D1 (en) 1985-10-03
EP0080998A1 (en) 1983-06-08
ATA511081A (en) 1983-05-15
AT373179B (en) 1983-12-27
DE8219586U1 (en) 1984-04-05

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