EP0104373B1 - Shrinkage compensating device for a continuous casting mould - Google Patents

Shrinkage compensating device for a continuous casting mould Download PDF

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Publication number
EP0104373B1
EP0104373B1 EP83107725A EP83107725A EP0104373B1 EP 0104373 B1 EP0104373 B1 EP 0104373B1 EP 83107725 A EP83107725 A EP 83107725A EP 83107725 A EP83107725 A EP 83107725A EP 0104373 B1 EP0104373 B1 EP 0104373B1
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EP
European Patent Office
Prior art keywords
casting
links
shrinkage
section
belts
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Expired
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EP83107725A
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German (de)
French (fr)
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EP0104373A1 (en
Inventor
Gerd Artz
Dieter Figge
Clemens Philipp
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Fried Krupp AG
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Fried Krupp AG
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Priority to AT83107725T priority Critical patent/ATE19013T1/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
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0648—Casting surfaces
    • B22D11/066—Side dams

Definitions

  • the invention relates to a shrinkage compensation device for a continuous casting mold, in particular for steel, which consists of endless casting belts opposing each other in pairs and endless sectional side dams provided between them, the mutual distance between both the side dams and the casting belts being greater in the initial region of the mold cross section than in its end region .
  • Casting devices with continuous casting molds enable lead, zinc and copper to be cast at high casting speeds.
  • the shrinkage process occurring in the continuous casting mold which is caused by the cooling and solidification of the casting metal, is taken into account in a first level, formed by the moving articulated side dams, by suitable inclination of the associated guide rails.
  • shrinkage compensation has so far only been approximated. This consists in the deformation of the casting belt by means of spherical support rollers in such a way that a contact section with the thinning casting strand is established at least in the central region of the casting belt.
  • this known proposed solution has the disadvantage that a more or less large cavity, possibly filled with air, is formed in the transition area to the side dams.
  • the casting belt is considerably stressed by the deformation by means of the support rollers insofar as a sharp, wear-increasing edge is created in the area of the rigid links of the side dams used here.
  • the invention is based on the creation of a shrinkage compensation device which, with as little stress on the casting belt as possible, enables the mold cross section in the region of the casting belts to be adjusted as continuously as possible, possibly also non-linearly.
  • the shrinkage compensation device should also be usable in particular for steel-casting continuous casting molds with mold walls running in the casting direction, it must be designed in such a way that it has the greater linear shrinkage in the case of steel (approximately 1.5% compared to 0.57% in the case of copper) and the resulting result takes account of the greater conicity of the mold cross section.
  • the best possible adaptation to the shrinking process i.e.
  • the stated object is achieved by a shrinkage compensation device which essentially has the features of claim 1.
  • the idea of the solution on which the invention is based consists in that the individual members of the side dams are adjustable with regard to the height dimension of at least one of their sides and provide guide elements which, by adjusting the height members when the members move in the casting direction, make the necessary adaptation to those in the area of the mold walls in front of them cause shrinking process.
  • the change in the height dimension can be carried out on the inner surface laterally delimiting the mold cross section and / or on the outer surface facing away from the mold cross section.
  • the side dams are therefore constructed from links in such a way that the distance between the casting belts in the casting direction, which determines the height dimension of the casting strand, can be gradually reduced.
  • the shrinkage compensation device can advantageously be designed in that the inclination is carried out in several mutually independent sections, in particular using guide rails or rulers which laterally support and move against one another.
  • a particularly good adaptation to the shrinking process can be achieved by means of links whose inner surface that laterally delimits the mold cross section is adjustable in terms of its height dimension.
  • the adjustment of the height dimension of the inner surface of the links can be made possible in particular by the fact that they have a plurality of components that can be moved relative to one another (claim 2).
  • the links are composed of two main bodies which can be pivoted relative to one another about an axis parallel to the casting direction (claim 3); by increasing the inclination of the main bodies relative to one another, the dimension of the inner surface laterally delimiting the mold cross section in the casting direction can be gradually reduced, so that the mutual spacing of the cooperating casting belts in the area between the links, for example from 70 mm in the initial area of the mold cross section to 69 mm in the end area changed.
  • the casting strand fills the mold cross-section in the initial area of the mold cross-section, ie in the case of main members of the members that are not inclined against one another, while in the end area there is already a strand shell with main bodies inclined against one another, the corners of which are due to the there strong cooling occurring do not lie on the mold walls.
  • the members consisting of two main bodies form a dense inner surface, they are preferably supported on one another by means of a cylindrical surface, the longitudinal axis of which is parallel to the casting direction (claim 4).
  • the main bodies can thus be pivoted relative to one another transversely to the casting direction; their mutual angular position can be changed in a simple manner by guide elements which act on them at least indirectly and which are designed differently to achieve the required tilting force, as seen in the casting direction.
  • the casting belts opposite one another with respect to the mold cross section can adapt to the angular position of the main body carrying them, which can change in the casting direction, without any particular additional stress.
  • the links can also consist of two wedge pieces supported on one another via wedge surfaces, the guide elements for displacing the wedge pieces being designed as control cams arranged in the casting direction (claim 5).
  • the control cams is designed to be adjustable with respect to the mold cross-section (claim 6).
  • control cams expediently have a sliding element (claim 7), on which the wedge pieces can move without great frictional resistance.
  • the wedge pieces supported in each case form two chains, which are supported on two guide elements running in the casting direction in the form of guide rails; these can also be formed in several parts to implement differently designed adaptation sections.
  • Another possibility of adapting to the shrinkage process within the continuous casting mold is to make the members of the side dams elastically deformable at least in the region of one side, preferably in the region of their outer surface facing away from the mold cross section.
  • the links have a longitudinally extending recess extending from their outer surface and in which a spring element is supported; the deformation of the links, which changes in the casting direction, takes place via guide elements which at least indirectly engage them (claim 9).
  • the recess can in particular also be designed as a slot, as long as its deformability ensures sufficient deformability.
  • the elastically deformable, preferably one-part links preferably consist of a copper alloy which remains sufficiently elastic when the links pass through the continuous casting mold.
  • the deformation of the links can be limited in a simple manner by adjustable spacer bolts arranged in the region of the guide elements.
  • the guide elements preferably consist of successive, stationary back-up rolls in the casting direction, on which the casting belts are also supported outside the permanent mold section in the region of the links (claim 10).
  • the subject of the invention can in particular also be designed such that, instead of the elastically deformable, one-part links, two-part links produced using a connecting axis and a spring element are used. These must additionally have a device which prevents the components which are movable against one another from unfolding in the unloaded state; As a device in this regard, in particular a retaining bolt comes into question which movably connects the two components to one another - to the connecting axis - to an adjustable extent.
  • the continuous casting mold used for casting steel has as essential components four mold walls (shown schematically in Fig. 2a, b) moving in the casting direction, which enclose a rectangular mold cross-section 1 and consist of an upper and lower endless casting belt 2 as well as a left and right endless side dam 3 exist as lateral boundaries.
  • the side dams are made up of individual ones Links 4 (see FIG. 1) with an overhead head part 5 and a base body 6 supporting this made of a copper alloy.
  • the base body 6 is equipped in the region of the head part 5 with a cylinder section 6 ', on the cylinder surfaces 6 "and 6"' of which the head part 5 is supported directly or pivotably via a bearing plate 7 located below.
  • Parts 5 and 7 are detachably connected to one another via a screw connection 8 consisting of screw 8 ', nut 8 "and locking ring 8"'.
  • the base body 6 is equipped with a guide part 9, which is held by a snap ring 10.
  • the guide part 9 receives a side dam chain, not shown, by means of which the individual links 4 are combined to form an endless side dam.
  • the mold walls are equipped with horizontally arranged deflection axes, not shown.
  • the main bodies 5 and 6 of the links 4 assume the starting position shown in FIG. 1, in which the vertical axis 5 'of the head part 5 coincides with the vertical axis 6 "" of the base body 6.
  • the mutual distance between the horizontal casting belts 2 is 70 mm.
  • the limbs 4 and also the casting belts 2 are gradually adjusted or deformed in the casting direction (that is, perpendicular to the plane of the drawing) by means of differently designed support rollers, not shown, in such a way that in the end region of the mold cross-section shown in FIG. 2 b a distance between the casting belts 2 of 69 mm results; the pivoting movement of the main bodies 5 and 6 relative to one another has the result that the vertical axes 5 'and 6 "" run at an angle to one another.
  • the limbs 4 which laterally delimit the mold cross section 1 consist of an upper and lower wedge piece 11 or 12, which extend over wedge surfaces 11; or 12 'support each other and the T-shaped recess 11 "or 12" are combined with their own side dam chain, not shown, to form endless side dams.
  • the links 4 are moved over the side dam chains, not shown, just like the casting belts 2 in the area of the mold cross section 1 in the direction of the plane of the drawing.
  • the upper wedge piece 11 is supported on the side facing away from the mold cross section 1 with the interposition of a slide strip 13 on a guide: rail 14, which in turn is part of a stationary hollow beam 15.
  • the lower wedge piece 12 is held laterally with the interposition of a slide bar 16 on a guide rail 17; this is fastened to an adjusting bolt 18, which in turn can be adjusted via adjusting nuts 19 with respect to the hollow support 15 for the longitudinal extension of the mold cross section 1.
  • a displacement of the adjusting bolt 18 not only results in a displacement of the wedge piece 12 to the right, but at the same time a reduction in the distance between the opposing casting belts 2.
  • the mold cross section 1 can thus be adapted to the shrinking process going on in the continuous casting mold by suitable mutual adjustment of the guide rails 14 and 17 in the casting direction and without unfavorable deformation of the flat casting belts 2.
  • All the parts serving to adjust the wedge pieces 11 and 12 can be arranged between the opposing casting belts 2; this applies in particular if the continuous casting mold is equipped with a further mold cross section on the left as a mirror image of the hollow beam 15.
  • the hollow support 15 is coated with a sliding layer 20 on its upper and lower sides to support the casting belts 2.
  • FIG. 4 The mode of operation of the interacting upper and lower wedge pieces 11 and 12 can be seen from FIG. 4.
  • the wedge pieces 11 and 12 which are movable relative to one another, are arranged in such a way that they form a continuous inner surface from the partial surfaces 11 '"and 12'".
  • the mold cross section is 70 x 180 mm.
  • the wedge pieces 11 and 12 are gradually shifted under the action of the slide rails 14 and 17 (see FIG. 3) in such a way that their outer surfaces 11 "" and 12 "'merge into each other without a step (FIG. 4 b
  • the die cut has a height of 69 mm and a width of 177 mm.
  • the advantage in particular of the embodiment according to FIGS. 3 and 4 is that the wedge pieces 11 and 12 forming the links of the side dams in the initial region (FIG. 4 a) of the mold cross section - ie in the region in which the casting strand practically does not yet have a strand shell - Form a closed, continuous boundary wall.
  • a continuous boundary wall does not have to be present in the end region of the mold cross section (FIG. 4b), since the casting strand here already has a sufficiently strong strand shell. Otherwise lie anyway, the corners of the casting strand - due to the particularly strong cooling effect in the corner area - do not adhere to the mutually angled, moving mold walls.
  • FIG. 5 a, b Another possibility of adapting the mold cross section 1 to the shrinking process consists in the use of side dams 3, which are composed of elastically deformable members 4 (FIGS. 5 a, b). In the area of their outer surface 4 'facing away from the mold cross section, these have a longitudinal recess 21 extending from the latter, which divides the individual link into two connected spreading arms 4 ". The longitudinal extent of the recess 21 is therefore shorter than seen transversely to the casting direction the width of the link in question.
  • the spreading arms 4 ′′ are each provided with bearing bores 22 that lie opposite one another in pairs and in which a prestressed coil spring 23 is located Under the action of the at least one helical spring 23, the link can deform, if necessary, in such a way that its outer surface 4 'has a different height dimension than its inner surface 4''forming the boundary wall of the casting cross section 1.
  • the deformation of the limbs 4 moving in the casting direction is brought about by means of supporting elements which consist of supporting rollers 24 arranged in a fixed manner with supporting sections 24 ′ arranged next to one another.
  • the casting belts 2 are supported on these both in the area of the mold cross section 1 and in the area of the links 4.
  • the support sections 24 'thus engage indirectly in the case of the illustrated embodiment, i. H. on the casting belts 2, on the links 4.
  • the support rollers 24 which follow one another in the casting direction are designed differently. As can be seen in the drawing (FIG. 5 a), the support rollers 24 opposite each other with respect to the mold cross section 1 press the links 4 together in the initial area in such a way that a rectangular mold cross section results, for example, with a height dimension of 70 mm; the support rollers 24 thus absorb the spring force which is emitted by the at least one coil spring 23 of each link 4.
  • the support rollers 24, which follow in the casting direction, are modified in such a way that, with simultaneous elastic deformation of the members 4, there is a change in the mold cross-section 1 which is at least approximately adapted to the shrinking process.
  • the support sections 24 ' are graduated transversely to the casting direction with respect to their diameter so that the spreading arms 4 "of the links 4 are spread apart from one another and the casting belts 2 - in continuation of the course resulting from the spreading - To run slightly to each other up to the longitudinal axis 1 'of the mold cross section 1.
  • the gradation of the support sections 24' is preferably selected such that the height dimension of the mold cross section 1 is already only 69 mm in the vicinity of the inner surface 4 "'of the links 4.
  • an elastically deformable member made of a copper alloy can be modified within the scope of the inventive concept in such a way that the spreading arms 4 "separated by a recess are pivotably connected to one another via a connecting axis; each member is therefore in this case formed in two parts.
  • the links 4 are preferably dimensioned and designed such that they heat up to approximately 500 ° C. during the passage through the continuous casting mold. This applies in order to maintain sufficient elasticity, in particular for the embodiment shown in FIGS. 5 a, b.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

A continuous casting apparatus for a metal casting arranged to compensate for shrinkage of the casting in a cross sectional plane of the casting normal to the casting direction. The apparatus includes a pair of endless casting belts each spaced from and facing the other to form respective mold walls and arranged for movement in the casting direction. A pair of endless articulated mold walls, each spaced from and facing the other, is disposed between the casting belts and arranged to move with the casting belts in the casting direction. The spacing between the articulated mold walls and between the casting belts is greater upstream than downstream relative to the casting direction. Each articulated mold wall includes a plurality of dam blocks. Each block has an inner face disposed at an angle relative to the casting belts and defining a surface of the casting transverse to the casting belts, and an outer face disposed at an angle relative to the casting belts and facing a direction opposite to that of the inner face. At least one of the faces of each dam block is adjustable in height between the casting belts. Guide means are provided for adjusting the height of the at least one face of each dam block.

Description

Die Erfindung betrifft eine Schrumpfausgleichseinrichtung für eine Stranggießkokille, insbesondere für Stahl, die aus sich paarweise gegenüberliegenden endlosen Gießbändern und zwischen diesen vorgesehenen endlosen gegliederten Seitendämmen besteht, wobei der gegenseitige Abstand sowohl der Seitendämme als auch der Gießbänder im Anfangsbereich des Kokillenguerschnitts größer ist als in seinem Endbereich.The invention relates to a shrinkage compensation device for a continuous casting mold, in particular for steel, which consists of endless casting belts opposing each other in pairs and endless sectional side dams provided between them, the mutual distance between both the side dams and the casting belts being greater in the initial region of the mold cross section than in its end region .

Gießvorrichtungen mit Stranggießkokillen, deren endlose Kokillenwände in Gießrichtung mitlaufen, ermöglichen das Gießen von Blei, Zink und Kupfer mit hoher Gießgeschwindigkeit. Dem in der Stranggießkokille auftretenden Schrumpfungsvorgang, welcher durch das Erkalten und Erstarren des Gießmetalls bedingt ist, wird dabei in einer ersten, durch die mitlaufenden gegliederten Seitendämme gebildeten Ebene durch geeignete Schrägstellung der zugehörigen Führungsschienen ziemlich genau Rechnung getragen. In der zweiten, durch die Gießbänder gebildeten Horizontalebene wird bisher nur angenähert ein Schrumpfungsausgleich angestrebt. Dieser besteht in der Verformung des Gießbandes mittels balliger Stützrollenin der Weise, daß sich zumindest im Mittelbereich des Gießbandes ein Berührungsabschnitt mit dem dünner werdenden Gießstrang einstellt.Casting devices with continuous casting molds, the endless mold walls of which run in the casting direction, enable lead, zinc and copper to be cast at high casting speeds. The shrinkage process occurring in the continuous casting mold, which is caused by the cooling and solidification of the casting metal, is taken into account in a first level, formed by the moving articulated side dams, by suitable inclination of the associated guide rails. In the second horizontal plane formed by the casting belts, shrinkage compensation has so far only been approximated. This consists in the deformation of the casting belt by means of spherical support rollers in such a way that a contact section with the thinning casting strand is established at least in the central region of the casting belt.

Dieser bekannte Lösungsvorschlag weist einerseits den Nachteil auf, daß sich im Übergangsbereich zu den Seitendämmen ein mehr oder weniger großer, gegebenenfalls mit Luft gefüllter Hohlraum bildet. Darüber hinaus wird das Gießband durch die Verformung mittels der Stützrollen insofern erheblich beansprucht, als im Bereich der hier zur Anwendung gelangenden starren Glieder der Seitendämme eine scharfe, verschleißerhöhende Kante entsteht.On the one hand, this known proposed solution has the disadvantage that a more or less large cavity, possibly filled with air, is formed in the transition area to the side dams. In addition, the casting belt is considerably stressed by the deformation by means of the support rollers insofar as a sharp, wear-increasing edge is created in the area of the rigid links of the side dams used here.

Der Erfindung liegt die Schaffung einer Schrumpfausgleichseinrichtung zugrunde, die bei möglichst geringer Beanspruchung des Gießbandes eine möglichst stetige, eventuell auch nicht-lineare Anpassung des Kokillenquerschnitts im Bereich der Gießbänder er möglicht. Da die Schrumpfausgleichseinrichtung insbesondere auch für stahlvergießende Stranggießkokillen mit in Gießrichtung mitlaufenden Kokillenwänden verwendbar sein soll, muß sie so beschaffen sein, daß sie der größeren linearen Schrumpfung bei Stahl (etwa 1,5 % gegenüber 0,57 % bei Kupfer) und der sich daraus ergebenden grö-ßeren Konizität des Kokillenquerschnitts Rechnung trägt. Eine möglichst gute Anpassung an den Schrumpfungsvorgang, d.h. an den dünner werdenden Gießstrang, ist von erheblicher Bedeutung, da nur dann im Bereich des Austritts der Stranggießkokille eine gleichmäßig starke, dünne Gießstrangschale und eine symmetrische, störungsfreie Erstarrung des Gießstrangs mit der sich daraus ergebenden Stahlgualität erzielbar ist.The invention is based on the creation of a shrinkage compensation device which, with as little stress on the casting belt as possible, enables the mold cross section in the region of the casting belts to be adjusted as continuously as possible, possibly also non-linearly. Since the shrinkage compensation device should also be usable in particular for steel-casting continuous casting molds with mold walls running in the casting direction, it must be designed in such a way that it has the greater linear shrinkage in the case of steel (approximately 1.5% compared to 0.57% in the case of copper) and the resulting result takes account of the greater conicity of the mold cross section. The best possible adaptation to the shrinking process, i.e. to the thinning casting strand is of considerable importance, since only then can a uniformly strong, thin casting strand shell and a symmetrical, trouble-free solidification of the casting strand with the resulting steel quality be achieved in the area of the outlet of the continuous casting mold.

Die gestellte Aufgabe wird durch eine Schrumpfausgleichseinrichtung gelöst, welche im wesentlichen die Merkmale des Anspruchs 1 aufweist. Der der Erfindung zugrundeliegende Lösungsgedanke besteht danach darin, die einzelnen Glieder der Seitendämme hinsichtlich der Höhenabmessung zumindest einer ihrer Seiten verstellbar auszubilden und Führungselamente vorzusehen, welche durch Verstellung der Höhenabmezsung bei der Bewegung der Glieder in Gießrichtung die erforderliche Anpassung an den im Bereich der Kokillenwände vor sich gehenden Schrumpfungsvorgang bewirken. Die Veränderung der Höhenabmessung kann dabei an der den Kokillenquerschnitt seitlich begrenzenden Innenfläche und/oder an der vom Kokillenquerschnitt abgewandten Außenfläche vorgenommen werden. Die Seitendämme sind demnach in der Weise aus Gliedern aufgebaut, daß der die Höhenabmessung des Gießstrangs festlegende Abstand zwischen den Gießbändern in Gießrichtung nach und nach verkleinert werden kann.The stated object is achieved by a shrinkage compensation device which essentially has the features of claim 1. The idea of the solution on which the invention is based consists in that the individual members of the side dams are adjustable with regard to the height dimension of at least one of their sides and provide guide elements which, by adjusting the height members when the members move in the casting direction, make the necessary adaptation to those in the area of the mold walls in front of them cause shrinking process. The change in the height dimension can be carried out on the inner surface laterally delimiting the mold cross section and / or on the outer surface facing away from the mold cross section. The side dams are therefore constructed from links in such a way that the distance between the casting belts in the casting direction, which determines the height dimension of the casting strand, can be gradually reduced.

Die Schrumpfausgleichseinrichtung kann hinsichtlich der Schrägstellung der Seitendämme in Gießrichtung dadurch vorteilhaft ausgestaltet sein, daß die Schrägstellung in mehreren voneinander unabhängigen Abschnitten vorgenommen wird, insbesondere unter Verwendung von die Seitendämme seitlich abstützenden und gegeneinander beweglichen Führungsschienen oder Linealen. Eine besonders gute Anpassung an den Schrumpfungsvorgang läßt sich dabei mittels Gliedern erreichen, deren den Kokillenguerschnitt seitlich begrenzende Innenfläche hinsichtlich ihrer Höhenabmessung verstellbar ist.With regard to the inclination of the side dams in the casting direction, the shrinkage compensation device can advantageously be designed in that the inclination is carried out in several mutually independent sections, in particular using guide rails or rulers which laterally support and move against one another. A particularly good adaptation to the shrinking process can be achieved by means of links whose inner surface that laterally delimits the mold cross section is adjustable in terms of its height dimension.

Die Anpassung der Höhenabmessung der Innenfläche der Glieder kann insbesondere dadurch ermöglicht werden, daß diese mehrere gegeneinander verschiebbare Bestandteile aufweisen (Anspruch 2).The adjustment of the height dimension of the inner surface of the links can be made possible in particular by the fact that they have a plurality of components that can be moved relative to one another (claim 2).

Bei einer vorteilhaften Ausgestaltung des Erfindungsgegenstandes sind die Glieder aus zwei Hauptkörpern zusammengesetzt, die um eine zur Gießrichtung parallele Achse gegeneinander schwenkbar sind (Anspruch 3); durch Vergrößerung der Neigung der Hauptkörper gegeneinander kann die Abmessung der den Kokillenquerschnitt seitlich begrenzenden Innenfläche in Gießrichtung nach und nach verkleinert werden, so daß sich der gegenseitige Abstand der zusammenwirkenden Gießbänder im Bereich zwischen den Gliedernbeispielsweise von 70 mm im Anfangsbereich des Kokillenquerschnitts auf 69 mm im Endbereich verändert. Dabei ist zu berücksichtigen, daß der Gießstrang im Anfangsbereich des Kokillenquerschnitts, d.h. bei nicht gegeneinander geneigten Hauptkörpern der Glieder, den Kokillenquerschnitt ausfüllt, während im Endbereich bei gegeneinander geneigten Hauptkörpern bereits eine Strangschale vorhanden ist, deren Ecken infolge der dort auftretenden stärkeren Abkühlung nicht an den Kokillenwänden anliegen. Damit die aus zwei Hauptkörpern bestehenden Glieder eine dichte Innenfläche bilden, stützen sie sich vorzugsweise über eine Zylinderfläche aneinander ab, deren Längsachse parallel zur Gießrichtung liegt (Anspruch 4). Die Hauptkörper sind also quer zur Gießrichtung gegeneinander schwenkbar; ihre gegenseitige Winkellage kann in einfacher Weise durch zumindest mittelbar an ihnen angreifende Führungselemente verändert werden, die zur Erzielung der erforderlichen Kippkraft - in Gießrichtung gesehen - unterschiedlich ausgebildet sind. Die sich bezüglich des Kokillenquerschnitts gegenüberliegenden Gießbänder können sich der in Gießrichtung veränderlichen Winkellage des sie tragenden Hauptkörpers ohne besondere zusätzliche Beanspruchung anpassen. Die beiden schwenkbar aneinander abgestützten Hauptkörper, nämlich der untenliegende Grundkörper mit einer Öffnung zur Aufnahme und Befestigung der die Glieder miteinander verbindenden Seitendammkette und das auf diesem ruhende Kopfteil, bestehen vorzugsweise aus einer Kupferlegierung.In an advantageous embodiment of the subject matter of the invention, the links are composed of two main bodies which can be pivoted relative to one another about an axis parallel to the casting direction (claim 3); by increasing the inclination of the main bodies relative to one another, the dimension of the inner surface laterally delimiting the mold cross section in the casting direction can be gradually reduced, so that the mutual spacing of the cooperating casting belts in the area between the links, for example from 70 mm in the initial area of the mold cross section to 69 mm in the end area changed. It should be taken into account that the casting strand fills the mold cross-section in the initial area of the mold cross-section, ie in the case of main members of the members that are not inclined against one another, while in the end area there is already a strand shell with main bodies inclined against one another, the corners of which are due to the there strong cooling occurring do not lie on the mold walls. So that the members consisting of two main bodies form a dense inner surface, they are preferably supported on one another by means of a cylindrical surface, the longitudinal axis of which is parallel to the casting direction (claim 4). The main bodies can thus be pivoted relative to one another transversely to the casting direction; their mutual angular position can be changed in a simple manner by guide elements which act on them at least indirectly and which are designed differently to achieve the required tilting force, as seen in the casting direction. The casting belts opposite one another with respect to the mold cross section can adapt to the angular position of the main body carrying them, which can change in the casting direction, without any particular additional stress. The two main bodies pivotably supported on one another, namely the underlying base body with an opening for receiving and fastening the side dam chain connecting the links and the head part resting thereon, preferably consist of a copper alloy.

Die Glieder können jedoch auch aus zwei über Keilflächen aufeinander abgestützten Keilstücken bestehen, wobei die Führungselemente zur Verschiebung der Keilstücke als über in Gießrichtung angeordnete Steuerkurven ausgebildet sind (Anspruch 5). Zur Erleichterung der Anpassung an unterschiedliche Gießverhältnisse ist zumindest eine der Steuerkurven bezüglich des Kokillenguerschnitts verstellbar ausgebildet (Anspruch 6).However, the links can also consist of two wedge pieces supported on one another via wedge surfaces, the guide elements for displacing the wedge pieces being designed as control cams arranged in the casting direction (claim 5). To facilitate adaptation to different casting conditions, at least one of the control cams is designed to be adjustable with respect to the mold cross-section (claim 6).

Auf der den Keilstücken zugewandten Seite weisen die Steuerkurven zweckmäßig ein Gleitelement auf (Anspruch 7), an dem sich die Keilstücke ohne großen Reibwiderstand entlang bewegen können.On the side facing the wedge pieces, the control cams expediently have a sliding element (claim 7), on which the wedge pieces can move without great frictional resistance.

Die jeweils aufeinander abgestützten Keilstücke bilden dabei zwei Ketten, die an zwei in Gießrichtung verlaufenden Führungselementen in Form von Führungsschienen abgestützt sind; diese können zur Verwirklichung unterschiedlich ausgebildeter Anpassungsabschnitte auch mehrteilig ausgebildet sein.The wedge pieces supported in each case form two chains, which are supported on two guide elements running in the casting direction in the form of guide rails; these can also be formed in several parts to implement differently designed adaptation sections.

Eine weitere Möglichkeit der Anpassung an den Schrumpfungsvorgang innerhalb der Stranggießkokille besteht darin, die Glieder der Seitendämme zumindest im Bereich einer Seite, vorzugsweise im Bereich ihrer vom Kokillenquerschnitt abgewandten Außenfläche, elastisch verformbar auszubilden (Anspruch 8).Another possibility of adapting to the shrinkage process within the continuous casting mold is to make the members of the side dams elastically deformable at least in the region of one side, preferably in the region of their outer surface facing away from the mold cross section.

Bei einer bevorzugten Ausführungsform des Erfindungsgegenstandes weisen die Glieder eine von ihrer Außenfläche ausgehende, in Längsrichtung verlaufende Ausnehmung auf, in der ein Federelement abgestützt ist; die sich in Gießrichtung verändernde Verformung der Glieder erfolgt dabei über an diesen zumindest mittelbar angreifende Führungselemente (Anspruch 9). Die Ausnehmung kann insbesondere auch als Schlitz ausgebildet sein, solange durch dessen Abmessung eine ausreichende Verformbarkeit gewährleistet ist.In a preferred embodiment of the subject matter of the invention, the links have a longitudinally extending recess extending from their outer surface and in which a spring element is supported; the deformation of the links, which changes in the casting direction, takes place via guide elements which at least indirectly engage them (claim 9). The recess can in particular also be designed as a slot, as long as its deformability ensures sufficient deformability.

Die elastisch verformbar ausgebildeten,- vorzugsweise einteiligen Glieder bestehen vorzugsweise aus einer Kupferlegierung, die beim Durchlauf der Glieder durch die Stranggießkokille ausreichend elastisch bleibt. Die Verformung der Glieder kann in einfacher Weise durch im Bereich der Führungselemente angeordnete, einstellbare Abstandsbolzen begrenzt werden. Die Führungselemente bestehen vorzugsweise aus in Gießrichtung aufeinanderfolgenden, ortsfesten Stützwalzen, an denen sich die Gießbänder auch außerhalb des Kokillenguerschnitts im Bereich der Glieder abstützen (Anspruch 10).The elastically deformable, preferably one-part links preferably consist of a copper alloy which remains sufficiently elastic when the links pass through the continuous casting mold. The deformation of the links can be limited in a simple manner by adjustable spacer bolts arranged in the region of the guide elements. The guide elements preferably consist of successive, stationary back-up rolls in the casting direction, on which the casting belts are also supported outside the permanent mold section in the region of the links (claim 10).

Der Erfindungsgegenstand kann insbesondere auch so ausgebildet sein, daß an Stelle der elastisch verformbaren, einteiligen Glieder zweiteilige, unter Verwendung einer Verbindungsachse und eines Federelements hergestellte Glieder zum Einsatz gelangen. Diese müssen zusätzlich eine Einrichtung aufweisen, die ein Auseinanderklappen der gegeneinander beweglichen Bestandteile in unbelastetem Zustand verhindert; als diesbezügliche Einrichtung kommt insbesondere ein Haltebolzen in Frage, der die beiden Bestandteile - guer zur Verbindungsachse - in einstellbarem Umfang beweglich miteinander verbindet.The subject of the invention can in particular also be designed such that, instead of the elastically deformable, one-part links, two-part links produced using a connecting axis and a spring element are used. These must additionally have a device which prevents the components which are movable against one another from unfolding in the unloaded state; As a device in this regard, in particular a retaining bolt comes into question which movably connects the two components to one another - to the connecting axis - to an adjustable extent.

Die Erfindung wird nachfolgend anhand der Zeichnung im einzelnen erläutert.The invention is explained below with reference to the drawing.

Es zeigen:

  • Fig. 1 in schematischer Darstellung einen Vertikalschnitt durch ein einzelnes Glied eines Seitendamms für eine Stranggießkokille mit zwei Hauptkörpern, die über eine Zylinderfläche schwenkbar aneinander abgestützt sind,
  • Fig. 2 a, b schematisch die Form der gemäß Fig. 1 ausgebildeten Glieder im Anfangs- bzw. im Endbereich des Kokillenguerschnitts,
  • Fig. 3 schematisch einen Vertikalschnitt durch eine Schrumpfausgleichseinrichtung, deren jeder Seite des Kokillenquerschnitts zugeordnete Glieder aus zwei gegeneinander beweglichen Keilstücken bestehen,
  • Fig. 4 a, b schematisch die gegenseitige zuordnung der in Fig. 3 dargestellten Keilstücke im Anfangs- bzw. im Endbereich des Kokillenquerschnitts und
  • Fig. 5 a, b einen vertikalen Teilschnitt durch eine Stranggießkokille, deren Seitendämme aus elastisch verformbaren Gliedern zusammengesetzt sind, im Anfangs- bzw. im Endbereich des Kokillenquerschnitts.
Show it:
  • 1 is a schematic representation of a vertical section through a single member of a side dam for a continuous casting mold with two main bodies which are pivotally supported on one another via a cylindrical surface,
  • 2 a, b schematically the shape of the links designed according to FIG. 1 in the beginning or in the end region of the permanent mold section,
  • 3 schematically shows a vertical section through a shrinkage compensation device, the links of which are assigned to each side of the mold cross section and consist of two wedge pieces which can be moved relative to one another,
  • Fig. 4 a, b schematically the mutual assignment of the wedge pieces shown in Fig. 3 in the beginning or in the end region of the mold cross-section and
  • 5 a, b a vertical partial section through a continuous casting mold, the side dams of which are composed of elastically deformable members, in the beginning or in the end region of the mold cross section.

Die zum Vergießen von Stahl eingesetzte Stranggießkokille weist als wesentliche Bestandteile vier (beispielsweise in Fig. 2 a, b schematisch dargestellte) in Gießrichtung bewegte Kokillenwände auf, die einen rechteckförmigen Kokillenquerschnitt 1 einschließen und aus einem oberen und unteren endlosen Gießband 2 sowie aus einem linken und rechten endlosen Seitendämm 3 als seitlichen Begrenzungen bestehen.The continuous casting mold used for casting steel has as essential components four mold walls (shown schematically in Fig. 2a, b) moving in the casting direction, which enclose a rectangular mold cross-section 1 and consist of an upper and lower endless casting belt 2 as well as a left and right endless side dam 3 exist as lateral boundaries.

Die Seitendämme setzen sich aus einzelnen Gliedern 4 (vgl. Fig. 1) mit einem obenliegenden Kopfteil 5 und einem dieses abstützenden Grundkörper 6 aus einer Kupferlegierung zusammen. Der Grundkörper 6 ist im Bereich des Kopfteils 5 mit einem Zylinderabschnitt 6' ausgestattet, an dessen Zylinderflächen 6" und 6"' das Kopfteil 5 sich unmittelbar bzw. über eine untenliegende Lagerplatte 7 schwenkbar abstützt. Die Teile 5 und 7 sind über eine Schraubverbindung 8 bestehend aus Schraube 8', Mutter 8" und Sicherungsring 8"' lösbar miteinander verbunden.The side dams are made up of individual ones Links 4 (see FIG. 1) with an overhead head part 5 and a base body 6 supporting this made of a copper alloy. The base body 6 is equipped in the region of the head part 5 with a cylinder section 6 ', on the cylinder surfaces 6 "and 6"' of which the head part 5 is supported directly or pivotably via a bearing plate 7 located below. Parts 5 and 7 are detachably connected to one another via a screw connection 8 consisting of screw 8 ', nut 8 "and locking ring 8"'.

Unterhalb des Zylinderabschnitts 6' ist der Grundkörper 6 mit einem Führungsteil 9 ausgestattet, welches über einen Sprengring 10 gehalten ist. Das Führungsteil 9 nimmt eine nicht dargestellte Seitendammkette auf, über welche die einzelnen Glieder 4 zu einem endlosen Seitendamm zusämmengefaßt sind.Below the cylinder section 6 ', the base body 6 is equipped with a guide part 9, which is held by a snap ring 10. The guide part 9 receives a side dam chain, not shown, by means of which the individual links 4 are combined to form an endless side dam.

Außerhalb des Kokillenquerschnitts 1 sind die Kokillenwände mit waagerecht angeordneten, nicht dargestellten Umlenkachsen ausgestattet.Outside the mold cross section 1, the mold walls are equipped with horizontally arranged deflection axes, not shown.

Im Anfangsbereich des Kokillenquerschnitts 1 nehmen die Hauptkörper 5 und 6 der Glieder 4 die in Fig. 1 dargestellte Ausgangslage ein, in welcher die Vertikalachse 5' des Kopfteils 5 mit der Vertikalachse 6" " des Grundkörpers 6 zusammenfällt. Der gegenseitige Abstand der horizontal verlaufenden Gießbänder 2 beträgt dabei 70 mm.In the initial region of the mold cross-section 1, the main bodies 5 and 6 of the links 4 assume the starting position shown in FIG. 1, in which the vertical axis 5 'of the head part 5 coincides with the vertical axis 6 "" of the base body 6. The mutual distance between the horizontal casting belts 2 is 70 mm.

Beim Durchlaufen der Stranggießkokille werden die Glieder 4 und auch die Gießbänder 2 mittels unterschiedlich ausgebildeter, nicht dargestellter Stützwalzen in Gießrichtung (d.h. senkrecht zur Zeichenebene) nach und nach so verstellt bzw. verformt, daß sich in dem in Fig. 2 b dargestellten Endbereich des Kokillenguerschnitts ein gegenseitiger Abstand der Gießbänder 2 von 69 mm ergibt; die Schwenkbewegung der Hauptkörper 5 und 6 relativ zueinander hat zur Folge, daß die Vertikalachsen 5' und 6" " abgewinkelt zueinander verlaufen.When passing through the continuous casting mold, the limbs 4 and also the casting belts 2 are gradually adjusted or deformed in the casting direction (that is, perpendicular to the plane of the drawing) by means of differently designed support rollers, not shown, in such a way that in the end region of the mold cross-section shown in FIG. 2 b a distance between the casting belts 2 of 69 mm results; the pivoting movement of the main bodies 5 and 6 relative to one another has the result that the vertical axes 5 'and 6 "" run at an angle to one another.

Bei der in Fig. 3 dargestellten Ausführungsform bestehen die den Kokillenguerschnitt 1 seitlich begrenzenden Glieder 4 aus einem oberen und unteren Keilstück 11 bzw. 12, die sich über bezüglich zur Waagerechten geneigte Keilflächen 11; bzw. 12' aufeinander abstützen und die über eine T-förmige Ausnehmung 11" bzw. 12" mit einer eigenen, nicht dargestellten Seitendammkette zu endlosen Seitendämmen zusammengefaßt sind. Die Glieder 4 werden über die nicht dargestellten Seitendammketten ebenso wie die Gießbänder 2 im Bereicb des Kokillenquerschnitts 1 in Richtung der Zeichenebene bewegt.In the embodiment shown in FIG. 3, the limbs 4 which laterally delimit the mold cross section 1 consist of an upper and lower wedge piece 11 or 12, which extend over wedge surfaces 11; or 12 'support each other and the T-shaped recess 11 "or 12" are combined with their own side dam chain, not shown, to form endless side dams. The links 4 are moved over the side dam chains, not shown, just like the casting belts 2 in the area of the mold cross section 1 in the direction of the plane of the drawing.

Das obere Keilstück 11 stützt sich auf der vom Kokillenquerschnitt 1 abgewandten Seite unter Zwischenschaltung einer Gleitleiste 13 an einer Führungs: schiene 14 ab, die ihrerseits Bestandteil eines ortsfesten Hohlträgers 15 ist. Das untere Keilstück 12 ist seitlich unter Zwischenschaltung einer Gleitleiste 16 an einer Führungsschiene 17 gehalten; diese ist an einem Einstellbolzen 18 befestigt, der seinerseits über Stellmuttern 19 bezüglich des Hohlträgers 15 guer zur Längserstreckung des Kokillenquerschnitts 1 einstellbar ist. Eine Verschiebung des Verstellbolzens 18 hat nicht nur eine Verschiebung des Keilstücks 12 nach rechts, sondern gleichzeitig eine Verkleinerung des Abstandes zwischen den sich gegenüberliegenden Gießbändern 2 zur Folge.The upper wedge piece 11 is supported on the side facing away from the mold cross section 1 with the interposition of a slide strip 13 on a guide: rail 14, which in turn is part of a stationary hollow beam 15. The lower wedge piece 12 is held laterally with the interposition of a slide bar 16 on a guide rail 17; this is fastened to an adjusting bolt 18, which in turn can be adjusted via adjusting nuts 19 with respect to the hollow support 15 for the longitudinal extension of the mold cross section 1. A displacement of the adjusting bolt 18 not only results in a displacement of the wedge piece 12 to the right, but at the same time a reduction in the distance between the opposing casting belts 2.

Der Kokillenquerschnitt 1 kann also durch geeignete gegenseitige Einstellung der Führungsschienen 14 und 17 in Gießrichtung und ohne ungünstige Verformung der ebenen Gießbänder 2 an den in der Stranggießkokille vor sich gehenden Schrumpfungsvorgang angepaßt werden. Die Rückführung der nicht dargestellten oberen bzw. unteren Seitendammkette erfolgt in einem Bogen oberhalb bzw. unterhalb der Stranggießkokille.The mold cross section 1 can thus be adapted to the shrinking process going on in the continuous casting mold by suitable mutual adjustment of the guide rails 14 and 17 in the casting direction and without unfavorable deformation of the flat casting belts 2. The return of the upper and lower side dam chain, not shown, takes place in an arc above or below the continuous casting mold.

Sämtliche der Verstellung der Keilstücke 11 und 12 dienende Teile können zwischen den sich gegenüberliegenden Gießbändern 2 angeordnet sein; dies gilt insbesondere dann, wenn die Stranggießkokille spiegelbildlich zum Hohlträger 15 links mit einem weiteren Kokillenguerschnitt ausgestattet ist.All the parts serving to adjust the wedge pieces 11 and 12 can be arranged between the opposing casting belts 2; this applies in particular if the continuous casting mold is equipped with a further mold cross section on the left as a mirror image of the hollow beam 15.

Der Hohlträger 15 ist zur Abstützung der Gießbänder 2 auf seiner Ober- und Unterseite mit einer Gleitschicht 20 belegt.The hollow support 15 is coated with a sliding layer 20 on its upper and lower sides to support the casting belts 2.

Die Wirkungsweise der zusammenwirkenden oberen und unteren Keilstücke 11 bzw. 12 ist aus Fig. 4 ersichtlich. Im Anfangsbereich (Fig. 4a) des Kokillenquerschnitts 1 sind die gegeneinander beweglichen Keilstücke 11 und 12 so angeordnet, daß sie eine durchgehende Innenfläche aus den Teilflächen 11'" und 12'" bilden. Der Kokillenquerschnitt beträgt dabei 70 x 180 mm. Beim Durchlauf durch die Stranggießkokille werden die Keilstücke 11 und 12 unter Einwirkung der Gleitschienen 14 und 17 (vgl. Fig. 3) nach und nach so verschoben, daß ihre Außenflächen 11" " und 12"' ohne Absatz ineinander übergehen (Fig. 4 b). Dies hat zur Folge, daß der Kokillenguerschnitt im Endbereit eine Höhe von 69 mm und eine Breite von 177 mm aufweist.The mode of operation of the interacting upper and lower wedge pieces 11 and 12 can be seen from FIG. 4. In the initial region (FIG. 4a) of the mold cross section 1, the wedge pieces 11 and 12, which are movable relative to one another, are arranged in such a way that they form a continuous inner surface from the partial surfaces 11 '"and 12'". The mold cross section is 70 x 180 mm. When passing through the continuous casting mold, the wedge pieces 11 and 12 are gradually shifted under the action of the slide rails 14 and 17 (see FIG. 3) in such a way that their outer surfaces 11 "" and 12 "'merge into each other without a step (FIG. 4 b This means that the die cut has a height of 69 mm and a width of 177 mm.

Durch geeignete Ausbildung der Keilstücke 11 und 12 sowie durch geeignete Einstellung der Führungsschienen 14 und 17 kann also bewirkt werden, daß sich der Kokillenguerschnitt dem in der Stranggießkokille vor sich gehenden Schrumpfungsvorgang bei der Bewegung der Kokillenwände 2 und 3 in Gießrichtung (d. h. quer zur Zeichenebene) selbsttätig anpaßt.With a suitable design of the wedge pieces 11 and 12 as well as with a suitable adjustment of the guide rails 14 and 17 it can thus be brought about that the mold cross-section is subject to the shrinking process taking place in the continuous casting mold during the movement of the mold walls 2 and 3 in the casting direction (ie transversely to the plane of the drawing). adapts automatically.

Der Vorteil insbesondere der Ausführungsform gemäß Fig. 3 und 4 besteht darin, daß die die Glieder der Seitendämme bildenden Keilstücke 11 und 12 im Anfangsbereich (Fig. 4 a) des Kokillenquerschnitts - d. h. in den Bereich, in dem der Gießstrang praktisch noch keine Strangschale aufweist - eine geschlossene, durchgehende Begrenzungswand bilden. Im Gegensatz dazu muß eine derartige durchgehende Begrenzungswand im Endbereich des Kokillenquerschnitts (Fig. 4 b) nicht vorliegen, da der Gießstrang hier bereits eine ausreichend starke Strangschale aufweist. Im übrigen liegen die Ecken des Gießstrangs - bedingt durch die im Eckbereich vorhandene besonders starke Kühlwirkung - ohnehin nicht an den gegeneinander abgev:''lkelten, bewegten Kokillenwänden an.The advantage in particular of the embodiment according to FIGS. 3 and 4 is that the wedge pieces 11 and 12 forming the links of the side dams in the initial region (FIG. 4 a) of the mold cross section - ie in the region in which the casting strand practically does not yet have a strand shell - Form a closed, continuous boundary wall. In contrast, such a continuous boundary wall does not have to be present in the end region of the mold cross section (FIG. 4b), since the casting strand here already has a sufficiently strong strand shell. Otherwise lie anyway, the corners of the casting strand - due to the particularly strong cooling effect in the corner area - do not adhere to the mutually angled, moving mold walls.

Eine weitere Möglichkeit der Anpassung des Kokillenquerschnitts 1 an den Schrumpfungsvorgang besteht in der Verwendung von Seitendämmen 3, die aus elastisch verformbaren Gliedern 4 zusammengesetzt sind (Fig. 5 a, b). Diese weisen im Bereich ihrer vom Kokillenquerschnitt abgewandten Außenfläche 4' eine von dieser ausgehende, in Längsrichtung verlaufende Ausnehmung 21 auf, welche das einzelne Glied in zwei zusammenhängende Spreizarme 4" aufteilt. Die Längserstreckung der Ausnehmung 21 ist also, quer zur Gießrichtung gesehen, kürzer als die Breite des betreffenden Gliedes.Another possibility of adapting the mold cross section 1 to the shrinking process consists in the use of side dams 3, which are composed of elastically deformable members 4 (FIGS. 5 a, b). In the area of their outer surface 4 'facing away from the mold cross section, these have a longitudinal recess 21 extending from the latter, which divides the individual link into two connected spreading arms 4 ". The longitudinal extent of the recess 21 is therefore shorter than seen transversely to the casting direction the width of the link in question.

Auf der vom Gießquerschnitt abgewandten Seite (d. h. in der Nähe der Außenfläche 4') sind die Spreizarme 4" jeweils mit sich paarweise gegenüberliegenden Lagerbohrungen 22 ausgestattet, in denen sich eine vorgespannte Schraubenfeder 23

Figure imgb0001
Unter Einwirkung der zumindest einen Schraubenfeder 23 kann sich das Glied erforderlichenfalls so verformen, daß seine Außenfläche 4' eine andere Höhenabmessung aufweist als seine die Begrenzungswand des Gießquerschnitts 1 bildende Innenfläche 4"'.On the side facing away from the casting cross-section (ie in the vicinity of the outer surface 4 ′), the spreading arms 4 ″ are each provided with bearing bores 22 that lie opposite one another in pairs and in which a prestressed coil spring 23 is located
Figure imgb0001
Under the action of the at least one helical spring 23, the link can deform, if necessary, in such a way that its outer surface 4 'has a different height dimension than its inner surface 4''forming the boundary wall of the casting cross section 1.

Die Verformung der sich in Gießrichtung (d. h. in die Zeichenebene hinein) bewegenden Glieder 4 wird mittels Stützelementen bewirkt, die aus ortsfest angeordneten Stützwalzen 24 mit nebeneinander angeordneten Stützabschnitten 24' bestehen. An diesen stützen sich die Gießbänder 2 sowohl im Bereich des Kokillenquerschnitts 1 als auch im Bereich der Glieder 4 ab. Die Stützabschnitte 24' greifen also im Falle des dargestellten Ausführungsbeispiels mittelbar, d. h. über die Gießbänder 2, an den Gliedern 4 an.The deformation of the limbs 4 moving in the casting direction (i.e. into the plane of the drawing) is brought about by means of supporting elements which consist of supporting rollers 24 arranged in a fixed manner with supporting sections 24 ′ arranged next to one another. The casting belts 2 are supported on these both in the area of the mold cross section 1 and in the area of the links 4. The support sections 24 'thus engage indirectly in the case of the illustrated embodiment, i. H. on the casting belts 2, on the links 4.

Zur Anpassung an den bereits erwähnten Schrumpfungsvorgang sind die in Gießrichtung aufeinanderfolgenden Stützwalzen 24 unterschiedlich ausgebildet. Wie die Zeichnung (Fig. 5 a) erkennen läßt, pressen die sich bezüglich des Kokillenquerschnitts 1 gegenüberliegenden Stützwalzen 24 die Glieder 4 im Anfangsbereich in der Weise zusammen, daß sich ein rechteckiger Kokillenquerschnitt beispielsweise mit einer Höhenabmessung von 70 mm ergibt; die Stützwalzen 24 nehmen also die Federkraft auf, die von der zumindest einen Schraubenfeder 23 jedes Gliedes 4 ausgeht.In order to adapt to the shrinking process already mentioned, the support rollers 24 which follow one another in the casting direction are designed differently. As can be seen in the drawing (FIG. 5 a), the support rollers 24 opposite each other with respect to the mold cross section 1 press the links 4 together in the initial area in such a way that a rectangular mold cross section results, for example, with a height dimension of 70 mm; the support rollers 24 thus absorb the spring force which is emitted by the at least one coil spring 23 of each link 4.

Die Stützwalzen 24, die sich in Gießrichtung anschließen, sind in der Weise abgewandelt, daß sich nach und nach bei gleichzeitiger elastischer Verformung der Glieder 4 eine dem Schrumpfungsvorgang zumindest annähernd angepaßte Änderung des Kokillenquerschnitts 1 ergibt. In seinem Endbereich (vgl. Fig. 5 b) sind die Stützabschnitte 24' quer zur Gießrichtung hinsichtlich ihrer Durchmesser so abgestuft, daß die Spreizarme 4" der Glieder 4 voneinander weggespreizt sind und die Gießbänder 2 - in Fortsetzung des sich aus der Spreizung ergebenden Verlaufs - bis zur Längsachse l' des Kokillenquerschnitts 1 geringfügig aufeinander zu verlaufen. Vorzugsweise ist die Abstufung der Stützabschnitte 24' so gewählt, daß die Höhenabmessung des Kokillenquerschnitts 1 bereits in der Nähe der Innenfläche 4"' der Glieder 4 nur noch 69 mm beträgt.The support rollers 24, which follow in the casting direction, are modified in such a way that, with simultaneous elastic deformation of the members 4, there is a change in the mold cross-section 1 which is at least approximately adapted to the shrinking process. In its end region (see FIG. 5 b), the support sections 24 'are graduated transversely to the casting direction with respect to their diameter so that the spreading arms 4 "of the links 4 are spread apart from one another and the casting belts 2 - in continuation of the course resulting from the spreading - To run slightly to each other up to the longitudinal axis 1 'of the mold cross section 1. The gradation of the support sections 24' is preferably selected such that the height dimension of the mold cross section 1 is already only 69 mm in the vicinity of the inner surface 4 "'of the links 4.

Bedingt durch die im Eckbereich vorhandene stärkere Kühlwirkung liegen die Ecken 25' des schematisch dargestellten Gießstrangs 25 nicht an den gegeneinander abgewinkelten Gießbändern 2 und Gliedern 4 an (Fig. 5 b).Due to the stronger cooling effect present in the corner area, the corners 25 'of the schematically illustrated casting strand 25 do not rest on the casting belts 2 and links 4 which are angled relative to one another (FIG. 5b).

Die soeben beschriebene Ausführungsform eines elastisch verformbaren, aus einer Kupferlegierung bestehenden Gliedes kann im Rahmen des Erfindungsgedankens in der Weise abgewandelt sein, daß die durch eine Ausnehmung voneinander getrennten Spreizarme 4" über eine Verbindungsachse schwenkbar miteinander in Verbindung stehen; jedes Glied ist in diesem Fall also zweiteilig ausgebildet.The just described embodiment of an elastically deformable member made of a copper alloy can be modified within the scope of the inventive concept in such a way that the spreading arms 4 "separated by a recess are pivotably connected to one another via a connecting axis; each member is therefore in this case formed in two parts.

Die Glieder 4 sind vorzugsweise so bemessen und ausgestaltet, daß sie sich während des Durchlaufs dürch die Stranggießkokille allenfalls auf etwa 500 ° C erwärmen. Dies gilt zur Erhaltung einer ausreichnenden Elastizität insbesondere für die in Fig. 5 a, b dargestellte Ausführungsform.The links 4 are preferably dimensioned and designed such that they heat up to approximately 500 ° C. during the passage through the continuous casting mold. This applies in order to maintain sufficient elasticity, in particular for the embodiment shown in FIGS. 5 a, b.

Claims (10)

1.) Shrinkage-compensating arrangement for a continuous-casting chill mould, especially for steel, which consists of endless casting belts lying opposite to one another in pairs and of endless linked side barriers provided between these, where the distance between both the side barriers and the casting belts is greater in the initial region of the chill mould cross-section than in its end region, characterised in that the height dimension of the individual links (4) of the side barriers is adjustable by means of guide elements (14, 17, 24) during their movement in the casting direction at least on one of their sides angled off in relation to the casting belts (2) - the inner face (4"') laterally limiting the chill mould cross-section (1) and the outer face (4') facing away from the chill mould cross-section.
2.) Shrinkage-compensating arrangement according to Claim 1, characterised in that the links (4) comprise several components (5, 6, 11, 12, 4") displaceable in relation to one another.
3.) Shrinkage-compensating arrangement according to one of Claims 1 or 2, characterised in that the links (4) consist of two main bodies (5, 6) which are pivotable in relation to one another about an axis parallel to the casting direction.
4.) Shrinkage-compensating arrangement according to Claim 3, characterised in that the two main bodies (5, 6) are supported on one another through a cylindrical surface (6") the longitudinal axis of which lies parallel to the casting direction.
5.) Shrinkage-compensating arrangement according to one of Claims 1 or 2, characterised in that the links (4) consist of two wedge pieces (11, 12) supported on one another through wedge faces (11', 12') and in that the guide elements are formed, for the displacement of the wedge pieces, as control cams (14, 17) arranged in the casting direction.
6.) Shrinkage-compensating arrangement according to Claim 5, characterised in that at least one of the control cams (14, 17) is adjustable in relation to the chill mould cross-section (1). 7.) Shrinkage-compensating arrangement according to one of Claims 5 or 6, characterised in that the control cams (14, 17) are equipped each with a slide element (13, 16) on the side facing the wedge pieces (11, 12).
8.) Shrinkage-compensating arrangement according to one of Claims 1 or 2, characterised in that the links (4) are elastically deformable at least in the region of their outer face (4') turned away from the chill mould cross-section (1).
9.) Shrinkage-compensating arrangement according to Claim 8, characterised in that the links (4) comprise a recess (21) extending in the longitudinal direction and starting from their outer face (4'), in which a spring element (23) is supported, and in that the deformation of the links, which varies in the casting direction, takes place through guide elements (24) engaging at least indirectly on the links.
10.) Shrinkage-compensating arrangement according to one of the preceding Claims, characterised in that the guide elements (24) consist of non-displaceable support rolls following one another in the casting direction, on which the casting belts (2) are also supported outside the chill mould cross-section (1) in the region of the links (4).
EP83107725A 1982-08-30 1983-08-05 Shrinkage compensating device for a continuous casting mould Expired EP0104373B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83107725T ATE19013T1 (en) 1982-08-30 1983-08-05 SHRINKAGE COMPENSATION DEVICE FOR A CONTINUOUS CASTING MOLD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232147A DE3232147C2 (en) 1982-08-30 1982-08-30 Shrinkage compensation device for a continuous casting mold
DE3232147 1982-08-30

Publications (2)

Publication Number Publication Date
EP0104373A1 EP0104373A1 (en) 1984-04-04
EP0104373B1 true EP0104373B1 (en) 1986-04-09

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ID=6172000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107725A Expired EP0104373B1 (en) 1982-08-30 1983-08-05 Shrinkage compensating device for a continuous casting mould

Country Status (6)

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US (1) US4510990A (en)
EP (1) EP0104373B1 (en)
JP (1) JPS5956951A (en)
AT (1) ATE19013T1 (en)
DE (1) DE3232147C2 (en)
ES (1) ES525208A0 (en)

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Publication number Priority date Publication date Assignee Title
DE4418160C2 (en) * 1994-05-25 2003-01-30 Sms Demag Ag Brammenstranggießkokille

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CH663165A5 (en) * 1983-08-24 1987-11-30 Lauener Eng Ag CASTING MACHINE FOR CONTINUOUSLY casting METAL AND METHOD FOR THE OPERATION THEREOF.
US4632176A (en) * 1985-04-19 1986-12-30 Pearce Ronald A Apparatus for continuous strip casting of aluminum sheet material
EP0205646A1 (en) * 1985-06-27 1986-12-30 Fried. Krupp Gesellschaft mit beschränkter Haftung Mould for belt-type continuous casting, especially for casting steel
EP0271603B1 (en) * 1986-12-19 1990-05-09 MANNESMANN Aktiengesellschaft Casting apparatus for metals having an endless track-type supporting element
JPH0636965B2 (en) * 1987-01-27 1994-05-18 三菱重工業株式会社 Belt type continuous casting machine
JPH05245590A (en) * 1992-03-04 1993-09-24 Sumitomo Heavy Ind Ltd Cast slab thickness variable mold for continuous casting
US6857464B2 (en) * 2002-09-19 2005-02-22 Hatch Associates Ltd. Adjustable casting mold

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CH426115A (en) * 1965-02-02 1966-12-15 Alusuisse Method for casting endless metal strands on a rotary machine and rotary machine therefor
US3538978A (en) * 1965-04-07 1970-11-10 Arnold H Boehm Method of rotatively casting continuous ingots
FR1483849A (en) * 1966-04-08 1967-06-09 Siderurgie Fse Inst Rech New device for continuous casting of metal
US3682228A (en) * 1971-03-11 1972-08-08 Phelps Dodge Copper Prod Method of continuous casting with circular trough mold
US3978909A (en) * 1974-01-02 1976-09-07 Allis-Chalmers Corporation Mold with convex sidewalls for continuous casting machines
DE2444269A1 (en) * 1974-09-17 1976-04-01 Metallgesellschaft Ag Segregation- free band shaped, cast strands mfr on band casting mach - where a melt in caused to solidify between revolving casting belts
US4061177A (en) * 1975-04-15 1977-12-06 Alcan Research And Development Limited Apparatus and procedure for the belt casting of metal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418160C2 (en) * 1994-05-25 2003-01-30 Sms Demag Ag Brammenstranggießkokille

Also Published As

Publication number Publication date
ATE19013T1 (en) 1986-04-15
ES8404886A1 (en) 1984-05-16
US4510990A (en) 1985-04-16
EP0104373A1 (en) 1984-04-04
JPS5956951A (en) 1984-04-02
ES525208A0 (en) 1984-05-16
DE3232147A1 (en) 1984-03-08
DE3232147C2 (en) 1984-12-06

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