EP0332939A2 - Bow-type continuous casting plant for billets - Google Patents

Bow-type continuous casting plant for billets Download PDF

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Publication number
EP0332939A2
EP0332939A2 EP89103611A EP89103611A EP0332939A2 EP 0332939 A2 EP0332939 A2 EP 0332939A2 EP 89103611 A EP89103611 A EP 89103611A EP 89103611 A EP89103611 A EP 89103611A EP 0332939 A2 EP0332939 A2 EP 0332939A2
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EP
European Patent Office
Prior art keywords
strand
straightening
starting
arc
shaped
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Granted
Application number
EP89103611A
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German (de)
French (fr)
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EP0332939B1 (en
EP0332939A3 (en
Inventor
Adalbert Röhrig
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Concast Standard AG
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Concast Standard AG
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Priority to AT89103611T priority Critical patent/ATE71863T1/en
Publication of EP0332939A2 publication Critical patent/EP0332939A2/en
Publication of EP0332939A3 publication Critical patent/EP0332939A3/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
    • B22D11/08—Accessories for starting the casting procedure
    • B22D11/081—Starter bars
    • B22D11/083—Starter bar head; Means for connecting or detaching starter bars and ingots
    • 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
    • B22D11/1226—Accessories for subsequent treating or working cast stock in situ for straightening strands

Definitions

  • the invention relates to a continuous sheet caster according to the preamble of claim 1.
  • start-up line For smaller formats, in particular for billet systems, so-called rigid, arc-shaped start-up strands are advantageously used in circular arc casting systems instead of flexible starting strands Start-up line described.
  • the length of the start-up line is dimensioned such that the head end is inserted into the bow mold and the foot end is engaged in the leveler.
  • a pair of driving rollers of the leveling machine is arranged at the tangent point.
  • a straightening roller which is also a decoupling between start-up strand and cast strand, aligns the arcuate strand at the tangent point according to the single-point straightening process. After uncoupling, the rigid start-up line is brought into a parking device above the horizontal conveying path by means of a drive.
  • the invention has for its object to provide a continuous casting system with a rigid start-up strand, which on the one hand has a low overall height with an arc radius of, for example, R ⁇ 3 m and at the same time avoids structural and / or surface defects such as cracks, etc. on the cast strand.
  • the invention proposes a continuous sheet caster according to the sum of the features of claim 1.
  • the continuous strand casting installation according to the invention allows a rigid, circular-arc-shaped starting strand to be passed through an oval-arc-shaped strand guiding part without radial bending forces acting on the starting strand. Furthermore, the basic concept according to the invention makes it possible to replace part of the circular-arc-shaped strand guideway by the oval-arc-shaped straightening section, as a result of which the cast arc-shaped strand can be gently bent open in two or more stages early, for example before reaching the tangent point.
  • the bending reaction roll (s) ensure that the strand, regardless of its possibly irregular temperature, especially during the pouring period, is exposed to precisely defined changes in elongation along the straightening section.
  • the strand in the known single-point straightening the strand is straightened in one step in an uncontrolled manner.
  • the strand is not directed along a curve, but according to its current local bending resistance.
  • bulky sheet continuous casting plants with a rigid start-up strand can therefore be significantly reduced in structure for the first time without disadvantages for the cast strand, which has a positive effect both on the overall height of the installation and on the length of the parking facility for the rigid start-up strand.
  • the oval-arched straightening section can be seen in the direction of the strand, e.g. start with a vertical beam of radii and the outfeed section for cast strands following the straightening line can rise slightly or be arranged horizontally.
  • An advantageous embodiment is obtained if the pair of drive rollers is arranged on a radius beam which lies in front of the vertical radius beam in the strand running direction and an angle of up to 30 degrees, preferably between 5-20 degrees, is provided between the two radius rays.
  • the start of the bending process along the strand guide can be freely selected depending on the size of the intended casting format, steel quality, etc. by placing the pair of drive rollers.
  • the design principle also enables the number of straightening stages to be freely designed between the pair of drive rollers and the straightening roller.
  • the straightening roller arranged in the strand conveying direction after the vertical radius beam can be used Separate the cast strand at the decoupling point from the start-up strand at the same time and transfer it from the circular arc via an oval arc to a straight line in at least two straightening stages.
  • Any number of bending reaction rollers can be arranged between the pair of drive rollers and the straightening roller along the outside of the oval-curved straightening path.
  • the start head with the coupling element for the cast strand can be attached directly to the rigid start strand.
  • Variants are also known which provide an additional coupling element between the starting head and the rigid starting strand, which ensures a separation between the cast strand and the starting strand during each casting cycle.
  • the rigid starting strand has a pivotable starting head member with a pivot axis parallel to the pivoting axis of the starting strand. The role for decoupling the starting strand from the cast strand exerts a force essentially radially directed to the circular arc-shaped strand path on this starting head member. A decoupling is initiated before the cast strand reaches the straightening and uncoupling roll.
  • Such a start-up line can also then also be trouble-free be moved into the mold if the start-up strand or the strand guide have certain dimensional tolerances to the nominal dimension due to wear.
  • the start-up head can be swiveled slightly and centered.
  • Modern sealing methods that simultaneously pinch a seal when retracting, as described for example in EP-PS 0'114'309, can also be used in such systems.
  • the precision of the introduction of the start-up line can be further increased if the start-up line is guided at its end opposite the start-up head by means of a pivot lever articulated in the center of the circular arc.
  • a continuous sheet caster with an arc mold 3, an oscillation device 4 and a secondary cooling device 5 is shown.
  • the center of the circular arc is designated 9.
  • a driving straightening machine is constructed from a pair of driving rollers 6, 6 ', a straightening roller 7 and a bending reaction roller 8.
  • An arc-shaped, rigid starting strand 10, which is held and guided by a pivot lever 11 articulated in the circular arc center 9 during the movement, is shown in a decoupling position by a cast strand 12.
  • a support 13 represents part of a parking device.
  • the swivel lever 11, which can be connected fixedly or coupled to the starting line 10, has a swivel drive, not shown, which is known per se.
  • An arrow 15 points to a decoupling point at which the straightening roller 7 separates or decouples the cast strand 12 from the starting strand 10.
  • the bending reaction roller 8 is positioned so that a first bending radius of e.g. 4.5 m results.
  • a subsequent roller 20 is already arranged in the horizontal plane of a cooling bed. With 7 'dash-dotted line roller 7 is shown in a position after decoupling. In this position she acts as a judge.
  • the rollers 20 belong to the discharge path, which can be arranged horizontally or slightly inclined.
  • the pair of driving rollers 6, 6 lies on a radiant beam 21 which begins at the center 9 of the guideway 17 of the arc-shaped starting strand 10.
  • This radiant beam 21 lies in the strand running direction 22 in front of a vertical radiant beam 23.
  • the bending reaction roller 8 of the oval-arc-shaped straightening path 18 is also arranged on the vertical radiant beam 23. It lies below the guideway 17 of the arc-shaped starting strand 10, approximately in the middle of the oval-arc-shaped straightening section 18. Between the rollers 6, 6 'and this bending reaction roller 8, the strand is bent in a first step. In the strand conveying direction 22 after the vertical radius beam 23 separates at the Ent Coupling point 15, the straightening roller 7, the cast strand from the start-up strand and bends the cast strand in the two straightening stages mentioned from the circular arc via an oval arc into a straight line.
  • the position of the bending reaction roller 8 or the radius of the first bending step can be calculated in such a way that there are two partial straightening sections along the straightening section 18 with essentially the same strains on the strand surface. For example, with a 100 mm thick strand, an arc radius of 2500 mm, a length of the straightening path of at least 1000 mm, elongation changes Epsilon in% / mm on the strand surface of a maximum of 0.002 can easily be realized.
  • the rigid starting line 10 is provided with a pivotable starting head member 25 with a pivot axis 26 parallel to the pivot axis in the circular arc center 9 (FIG. 1) of the starting line 10.
  • the roller 7 for decoupling the starting strand 10 from the cast strand 12 exerts a force directed essentially radially to the circular arc-shaped strand path on the starting head member 25. In this example, the uncoupling can be initiated earlier and the foot end of the strand 12 can thus be better directed.
  • the starting head member 25 is provided with means which ensure that the member 25 tilts back into the arc shape of the starting strand 10.
  • a further bending reaction role 8 ' is included in this example, which gives an additional straightening level.
  • the cast strand 12 is directed simultaneously in three straightening stages by means of the roller 7.
  • the circular-arc-shaped guideway 17 of the starting strand 10 is shown in dash-dotted lines.

Abstract

In bow-type continuous casting plants for billets, blooms and sheet bars which use a rigid dummy bar (10) for initial casting, structural and/or surface defects, such as cracks, in the cast strand (12) are to be avoided even in the case of small arc radii, e.g. </= 3 m. For this purpose, an oval-arc-shaped straightening section (18) with bending reaction rolls (8) is provided for the cast strand (12) underneath the guideway (17) for the circular-arc-shaped dummy bar (10), between a pair (6, 6') of driving rolls arranged on a circular-arc-shaped strand path and the decoupling point (15). <IMAGE>

Description

Die Erfindung betrifft eine Bogenstranggiessanlage nach dem Oberbegriff von Anspruch 1.The invention relates to a continuous sheet caster according to the preamble of claim 1.

Um bei Stahlstranggiessanlagen eine niedrige Bauhöhe zu erreichen, werden Kokillen mit gebogenem Formhohlraum verwendet. Durch Verkleinerung der Bogenradien solcher Kokillen konnte die Bauhöhe weiter reduziert werden. Mit kleiner werdenden Kokillenradien vergrössert sich aber beim Richten des Stranges die Dehnung in der Strangkruste in der Richtmaschine. Es ist deshalb vorgeschlagen worden, Kreisbogenkokillen mit oval-bogenförmigen Strangführungen zu kombinieren. Solche Anlagen erfordern zum Angiessen ei­nen flexiblen Anfahrstrang, der in der Regel aus gelenkig verbundenen Gliedern besteht.In order to achieve a low overall height in continuous steel casting plants, molds with a curved mold cavity are used. The overall height could be further reduced by reducing the arc radii of such molds. As the mold radii become smaller, however, the stretch in the strand crust in the straightening machine increases when the strand is straightened. It has therefore been proposed to combine circular arc molds with oval-arc-shaped strand guides. Such systems require a flexible start-up line for casting, which usually consists of articulated links.

Für kleinere Formate, insbesondere für Knüppelanlagen, werden bei Kreisbogenstranggiessanlagen anstelle von flexi­blen Anfahrsträngen mit Vorteil sogenannte starre, kreisbo­genförmige Anfahrstränge verwendet.In der DE-OS 2'629'453, die den Oberbegriff bildet, wird eine Bogenstranggiessan­lage für Knüppel oder Vorblockstränge mit einem starren Anfahrstrang beschrieben. Die Länge des Anfahrstranges ist so bemessen, dass gleichzeitig das Kopfende in der Bogenko­kille eingeführt ist und das Fussende in der Treibrichtma­schine im Eingriff steht. Im Tangentpunkt ist ein Treibrol­lenpaar der Treibrichtmaschine angeordnet. Eine Richtrol­le, die gleichzeitig auch eine Entkupplung zwischen Anfahr­ strang und gegossenem Strang durchführt, richtet den kreis­bogenförmigen Strang im Tangentpunkt nach dem Einpunkt-­Richtverfahren. Nach der Entkupplung wird der starre An­fahrstrang mittels einem Antrieb in eine Parkvorrichtung oberhalb der horizontalen Ausförderstrecke gebracht. Bei entsprechend grossen Kreisbogen, beispielsweise zwischen 4 und 8 m Radius, eignen sich solche Anlagen auch für rissem­pfindliche Stähle oder grössere Strangformate, weil die Dehnung beim Richten mit zunehmendem Kreisbogenradius klei­ner wird. Wird ein Radius des Kreisbogens von 3 m oder kleiner vorgesehen, so vergrössert sich die Dehnung beim Richten im Tangentpunkt. Auch die Distanz zwischen dem Treibrollenpaar im Tangentpunkt und der Entkupplungs- und Richtrolle wird kürzer. Dies führt zu Gefüge- und/oder Oberflächenfehlern an den gegossenen Strängen.For smaller formats, in particular for billet systems, so-called rigid, arc-shaped start-up strands are advantageously used in circular arc casting systems instead of flexible starting strands Start-up line described. The length of the start-up line is dimensioned such that the head end is inserted into the bow mold and the foot end is engaged in the leveler. A pair of driving rollers of the leveling machine is arranged at the tangent point. A straightening roller, which is also a decoupling between start-up strand and cast strand, aligns the arcuate strand at the tangent point according to the single-point straightening process. After uncoupling, the rigid start-up line is brought into a parking device above the horizontal conveying path by means of a drive. With a correspondingly large circular arc, for example between 4 and 8 m radius, such systems are also suitable for crack-sensitive steels or larger strand formats, because the stretching during straightening decreases with increasing circular arc radius. If a radius of the circular arc of 3 m or less is provided, the elongation increases when straightening at the tangent point. The distance between the drive roller pair at the tangent point and the decoupling and straightening roller is also becoming shorter. This leads to structural and / or surface defects on the cast strands.

Der Erfindung liegt die Aufgabe zugrunde, eine Bogenstrang­giessanlage mit starrem Anfahrstrang zu schaffen, die ei­nerseits eine geringe Bauhöhe mit einem Bogenradius von beispielsweise R ≦ 3 m aufweist und gleichzeitig Gefüge- und/oder Oberflächenfehler, wie Risse etc. am gegossenen Strang vermeidet.The invention has for its object to provide a continuous casting system with a rigid start-up strand, which on the one hand has a low overall height with an arc radius of, for example, R ≦ 3 m and at the same time avoids structural and / or surface defects such as cracks, etc. on the cast strand.

Zur Lösung dieser Aufgabe schlägt die Erfindung eine Bogen­stranggiessanlage gemäss der Summe der Merkmale von An­spruch 1 vor.To achieve this object, the invention proposes a continuous sheet caster according to the sum of the features of claim 1.

Die erfindungsgemässe Bogenstranggiessanlage erlaubt es, einen starren, kreisbogenförmigen Anfahrstrang durch einen oval-bogenförmigen Strangführungsteil hindurchzuführen, oh­ne dass radiale Biegekräfte auf den Anfahrstrang wirken. Im weiteren ermöglicht das erfindungsgemässe Grundkonzept, einen Teil der kreisbogenförmigen Strangführungsbahn durch die oval-bogenförmige Richtstrecke zu ersetzen, wodurch frühzeitig, z.B. vor Erreichen des Tangentpunktes, der ge­gossene bogenförmige Strang in zwei oder mehr Teilstufen sanft aufgebogen werden kann. Die Biegereaktionsrolle (n) stellen sicher, dass der Strang, unabhängig von seiner eventuell unregelmässigen Temperatur, insbesondere während der Angiessperiode, genau definierten Dehnungsänderungen entlang der Richtstrecke ausgesetzt ist. Im Gegensatz zum erfindungsgemässen Richtkonzept wird beim bekannten Ein­punktrichten der Strang unkontrolliert in einer Stufe gerichtet. Dabei wird der Strang nicht entlang einer Kur­ve, sondern entsprechend seinem momentanen örtlichen Biege­widerstand gerichtet. Gemäss der Erfindung können deshalb sperrige Bogenstranggiessanlagen mit starrem Anfahrstrang erstmals ohne Nachteile für den gegossenen Strang in ihrem Aufbau wesentlich verkleinert werden, was sich sowohl auf die Bauhöhe der Anlage als auch auf die Länge der Parkein­richtung für den starren Anfahrstrang positiv auswirkt.The continuous strand casting installation according to the invention allows a rigid, circular-arc-shaped starting strand to be passed through an oval-arc-shaped strand guiding part without radial bending forces acting on the starting strand. Furthermore, the basic concept according to the invention makes it possible to replace part of the circular-arc-shaped strand guideway by the oval-arc-shaped straightening section, as a result of which the cast arc-shaped strand can be gently bent open in two or more stages early, for example before reaching the tangent point. The bending reaction roll (s) ensure that the strand, regardless of its possibly irregular temperature, especially during the pouring period, is exposed to precisely defined changes in elongation along the straightening section. In contrast to the straightening concept according to the invention, in the known single-point straightening the strand is straightened in one step in an uncontrolled manner. The strand is not directed along a curve, but according to its current local bending resistance. According to the invention, bulky sheet continuous casting plants with a rigid start-up strand can therefore be significantly reduced in structure for the first time without disadvantages for the cast strand, which has a positive effect both on the overall height of the installation and on the length of the parking facility for the rigid start-up strand.

Die oval-bogenförmige Richtstrecke kann in Stranglaufrich­tung gesehen z.B. beim einen vertikalen Radienstrahl begin­nen und die an die Richtstreecke anschliessende Ausförder­strecke für gegossene Stränge kann leicht ansteigen oder waagrecht angeordnet sein. Eine vorteilhafte Ausführungs­form ergibt sich, wenn das Treibrollenpaar auf einem Radi­enstrahl angeordnet ist, der in Stranglaufrichtung vor dem vertikalen Radienstrahl liegt und zwischen beiden Radien­strahlen ein Winkel bis 30 Grad, vorzugsweise zwischen 5 - 20 Grad, vorgesehen ist. Als weitere Alternativlösung wird vorgeschlagen, auf dem vertikalen Radienstrahl eine Biege­reaktionsrolle der oval-bogenförmigen Richtstrecke anzuord­nen.The oval-arched straightening section can be seen in the direction of the strand, e.g. start with a vertical beam of radii and the outfeed section for cast strands following the straightening line can rise slightly or be arranged horizontally. An advantageous embodiment is obtained if the pair of drive rollers is arranged on a radius beam which lies in front of the vertical radius beam in the strand running direction and an angle of up to 30 degrees, preferably between 5-20 degrees, is provided between the two radius rays. As a further alternative solution, it is proposed to arrange a bending reaction roller of the oval-arch-shaped straightening section on the vertical radiant beam.

Der Beginn des Biegeprozesses entlang der Strangführung kann je nach der Grösse des vorgesehenen Giessformates, Stahlqualität etc. durch eine Plazierung des Treibrollen­paares frei gewählt werden. Das Konstruktionsprinzip ermög­licht auch eine freie Gestaltung der Richtstufenzahl zwi­schen dem Treibrollenpaar und der Richtrolle. Gemäss einem weiteren Lösungsvorschlag kann die in Strangförderrichtung nach dem vertikalen Radienstrahl angeordnete Richtrolle den gegossenen Strang an der Entkupplungsstelle gleichzeitig vom Anfahrstrang trennen und in mindestens zwei Richtstu­fen vom Kreisbogen über einen Ovalbogen in eine Gerade überführen. Zwischen dem Treibrollenpaar und der Richtrol­le kann entlang der Aussenseite der oval-bogenförmigen Richtstrecke eine beliebige Anzahl von Biegereaktionsrol­len angeordnet werden.The start of the bending process along the strand guide can be freely selected depending on the size of the intended casting format, steel quality, etc. by placing the pair of drive rollers. The design principle also enables the number of straightening stages to be freely designed between the pair of drive rollers and the straightening roller. According to a further proposed solution, the straightening roller arranged in the strand conveying direction after the vertical radius beam can be used Separate the cast strand at the decoupling point from the start-up strand at the same time and transfer it from the circular arc via an oval arc to a straight line in at least two straightening stages. Any number of bending reaction rollers can be arranged between the pair of drive rollers and the straightening roller along the outside of the oval-curved straightening path.

Es liegt im Ermessen des Fachmannes, die format- und stahl­qualitätspezifischen Dehnungen an der Strangoberfläche auf Biegestrecken vor und nach dem vertikalen Radienstrahl zu verteilen. Im Sinne einer zusätzlichen Alternativlösung wird vorgeschlagen, dass die auf dem vertikalen Radien­strahl angeordnete Biegereaktionsrolle in ihrer Lage so festgelegt wird, dass die Richtstrecke in zwei Teilricht­strecken mit im wesentlichen gleichen Teildehnungen an der Strangoberfläche unterteilt ist. Die Dehnungsänderung ent­lang der Richtstrecke an der Strangoberfläche bei einer Strangdicke von beispielsweise 100 mm kann dabei mit Vor­teil auf maximal 0,002 %/mm eingestellt werden.It is at the discretion of the person skilled in the art to distribute the format- and steel quality-specific strains on the strand surface on bending sections before and after the vertical radius beam. In the sense of an additional alternative solution, it is proposed that the position of the bending reaction roller arranged on the vertical radius beam is fixed in such a way that the straightening section is divided into two partial straightening sections with essentially the same partial expansions on the strand surface. The change in elongation along the straightening section on the strand surface with a strand thickness of, for example, 100 mm can advantageously be set to a maximum of 0.002% / mm.

Der Anfahrkopf mit dem Kupplungsglied für den gegossenen Strang kann direkt am starren Anfahrstrang befestigt sein. Es sind auch Varianten bekannt, die zwischen dem Anfahr­kopf und dem starren Anfahrstrang ein zusätzliches Kupp­lungselement vorsehen, das eine Trennung zwischen dem gegossenen Strang und dem Anfahrstrang bei jedem Giesszy­klus sicherstellt. Bei einer besonders vorteilhaften Aus­führungsform besitzt der starre Anfahrstrang ein schwenkba­res Anfahrkopfglied mit einer Schwenkachse parallel zur Verschwenkachse des Anfahrstranges. Die Rolle zum Entkup­peln des Anfahrstranges vom gegossenen Strang übt dabei eine im wesentlichen radial zur kreisbogenförmigen Strang­bahn gerichtete Kraft auf dieses Anfahrkopfglied aus. Da­bei wird eine Entkupplung eingeleitet, bevor der gegossene Strang die Richt- und Entkupplungsrolle erreicht. Ein sol­cher Anfahrstrang kann zusätzlich auch dann störungsfrei in die Kokille eingefahren werden, wenn der Anfahrstrang bzw. die Strangführung durch Verschleiss gewisse Masstole­ranzen zum Sollmass aufweisen. Der Anfahrkopf kann dabei beim Einfahren durch die Kokille leicht verschwenkt und dabei zentriert werden. Moderne Dichtungsmethoden, die beim Einfahren gleichzeitig eine Dichtung einklemmen, wie beispielsweise in EP-PS 0'114'309 beschrieben, sind bei solchen Anlagen ebenfalls anwendbar.The start head with the coupling element for the cast strand can be attached directly to the rigid start strand. Variants are also known which provide an additional coupling element between the starting head and the rigid starting strand, which ensures a separation between the cast strand and the starting strand during each casting cycle. In a particularly advantageous embodiment, the rigid starting strand has a pivotable starting head member with a pivot axis parallel to the pivoting axis of the starting strand. The role for decoupling the starting strand from the cast strand exerts a force essentially radially directed to the circular arc-shaped strand path on this starting head member. A decoupling is initiated before the cast strand reaches the straightening and uncoupling roll. Such a start-up line can also then also be trouble-free be moved into the mold if the start-up strand or the strand guide have certain dimensional tolerances to the nominal dimension due to wear. When moving in through the mold, the start-up head can be swiveled slightly and centered. Modern sealing methods that simultaneously pinch a seal when retracting, as described for example in EP-PS 0'114'309, can also be used in such systems.

Die Präzision der Einführung des Anfahrstranges kann wei­ter erhöht werden, wenn der Anfahrstrang an seinem dem Anfahrkopf gegenüberliegenden Ende mittels eines im Kreis­bogenzentrum angelenkten Schwenkhebels geführt ist.The precision of the introduction of the start-up line can be further increased if the start-up line is guided at its end opposite the start-up head by means of a pivot lever articulated in the center of the circular arc.

Im nachfolgenden werden anhand von Figuren Ausführungsbei­spiele der Erfindung beschrieben.Exemplary embodiments of the invention are described below with reference to figures.

Es zeigen:

  • Fig. 1 eine Seitenansicht auf eine schematisch darge­stellte Bogenstranggiessanlage und
  • Fig. 2 eine Seitenansicht auf eine oval-bogenförmige Richtstrecke.
Show it:
  • Fig. 1 is a side view of a schematically illustrated continuous casting and
  • Fig. 2 is a side view of an oval-arched straightening section.

In Fig. 1 ist eine Bogenstranggiessanlage mit einer Bogen­kokille 3, einer Oszillationseinrichtung 4 und einer Sekun­därkühleinrichtung 5 dargestellt. Das Zentrum des Kreisbo­gens ist mit 9 bezeichnet. Eine Treibrichtmaschine ist aus einem Treibrollenpaar 6, 6′, einer Richtrolle 7 und einer Biegereaktionsrolle 8 aufgebaut. Ein kreisbogenförmiger, starrer Anfahrstrang 10, der von einem im Kreisbogenzen­trum 9 angelenkten Schwenkhebel 11 während der Bewegung gehalten und geführt wird, ist in einer Entkupplungsposi­tion von einem gegossenen Strang 12 dargestellt. Eine Stutze 13 stellt einen Teil einer Parkvorrichtung dar. Der Schwenkhebel 11, welcher fest oder kuppelbar mit dem An­fahrstrang 10 verbunden sein kann, besitzt einen nicht dargestellten, an sich bekannten Schwenkantrieb.In Fig. 1, a continuous sheet caster with an arc mold 3, an oscillation device 4 and a secondary cooling device 5 is shown. The center of the circular arc is designated 9. A driving straightening machine is constructed from a pair of driving rollers 6, 6 ', a straightening roller 7 and a bending reaction roller 8. An arc-shaped, rigid starting strand 10, which is held and guided by a pivot lever 11 articulated in the circular arc center 9 during the movement, is shown in a decoupling position by a cast strand 12. A support 13 represents part of a parking device. The swivel lever 11, which can be connected fixedly or coupled to the starting line 10, has a swivel drive, not shown, which is known per se.

Er kann den Anfahrstrang um das Kreisbogenzentrum 9 ver­schwenken und in das Treibrollenpaar 6, 6′ einführen bzw. aus diesem herausführen. Ein Pfeil 15 zeigt auf eine Ent­kupplungsstelle, an welcher die Richtrolle 7 den gegosse­nen Strang 12 vom Anfahrstrang 10 trennt bzw. entkuppelt. Unterhalb der Führungsbahn 17 für den kreisbogenförmigen Anfahrstrang 10 ist zwischen dem Treibrollenpaar 6, 6′ und der Entkupplungsstelle 15 eine oval-bogenförmige Richt­strecke 18 mit der Biegereaktionsrolle 8 für den gegosse­nen Strang vorgesehen. Das Teibrollenpaar 6, 6′ liegt auf dem Kreisbogen, der beispielsweise einen Radius von 2,5 m aufweist. Die Biegereaktionsrolle 8 ist so positioniert, dass sich ein erster Aufbiegeradius von z.B. 4,5 m ergibt. Eine nachfolgende Rolle 20 ist bereits in der horizontalen Ebene eines Kühlbettes angeordnet. Mit 7′ ist strichpunk­tiert die Rolle 7 in einer Position nach der Entkupplung dargestellt. Sie hat in dieser Position die Funktion einer Richtrolle.He can pivot the starting strand around the circular arc center 9 and insert it into the drive roller pair 6, 6 'or lead it out of it. An arrow 15 points to a decoupling point at which the straightening roller 7 separates or decouples the cast strand 12 from the starting strand 10. Below the guideway 17 for the arc-shaped starting strand 10 between the drive roller pair 6, 6 'and the decoupling point 15, an oval-arc-shaped straightening path 18 is provided with the bending reaction roller 8 for the cast strand. The pair of Teibrollen 6, 6 'lies on the circular arc, which has a radius of 2.5 m, for example. The bending reaction roller 8 is positioned so that a first bending radius of e.g. 4.5 m results. A subsequent roller 20 is already arranged in the horizontal plane of a cooling bed. With 7 'dash-dotted line roller 7 is shown in a position after decoupling. In this position she acts as a judge.

Die Rollen 20 gehören zur Ausförderstrecke, die waagrecht oder leicht geneigt angeordnet sein kann. Das Treibrollen­paar 6, 6′ liegt auf einem Radienstrahl 21, der im Mittel­punkt 9 der Führungsbahn 17 des kreisbogenförmigen Anfahr­stranges 10 beginnt. Dieser Radienstrahl 21 liegt in Stranglaufrichtung 22 vor einem vertikalen Radienstrahl 23. Zwischen beiden Radienstrahlen 21, 23 ist ein Winkel Alpha von beispielsweise bis 30 Grad, vorzugsweise zwi­schen 5 - 20 Grad vorgesehen.The rollers 20 belong to the discharge path, which can be arranged horizontally or slightly inclined. The pair of driving rollers 6, 6 'lies on a radiant beam 21 which begins at the center 9 of the guideway 17 of the arc-shaped starting strand 10. This radiant beam 21 lies in the strand running direction 22 in front of a vertical radiant beam 23. Between the two radiant beams 21, 23 there is an angle alpha of, for example, up to 30 degrees, preferably between 5-20 degrees.

Auf dem vertikalen Radienstrahl 23 ist auch die Biegereak­tionsrolle 8 der oval-bogenförmigen Richtstrecke 18 ange­ordnet. Sie liegt unterhalb der Führungsbahn 17 des kreis­bogenförmigen Anfahrstranges 10, etwa in der Mitte der oval-bogenförmigen Richtstrecke 18. Zwischen den Rollen 6, 6′ und dieser Biegereaktionsrolle 8 wird der Strang in einem ersten Schritt aufgebogen. In Strangförderrichtung 22 nach dem vertikalen Radienstrahl 23 trennt an der Ent­ kupplungsstelle 15 die Richtrolle 7 den gegossenen Strang vom Anfahrstrang und biegt den gegossenen Strang in den genannten zwei Richtstufen vom Kreisbogen über einen Oval­bogen in eine Gerade. Die Lage der Biegereaktionsrolle 8 bzw. der Radius des ersten Biegeschrittes kann so berech­net werden, dass sich entlang der Richtstrecke 18 zwei Teilrichtstrecken mit im wesentlichen gleichen Dehnungen an der Strangoberfläche ergeben. Es sind beispielsweise bei einem 100 mm dicken Strang, einem Bogenradius von 2500 mm, einer Länge der Richtstrecke von mindestens 1000 mm Dehnungsänderungen Epsilon in %/mm an der Strang­oberfläche von maximal 0,002 leicht realisierbar.The bending reaction roller 8 of the oval-arc-shaped straightening path 18 is also arranged on the vertical radiant beam 23. It lies below the guideway 17 of the arc-shaped starting strand 10, approximately in the middle of the oval-arc-shaped straightening section 18. Between the rollers 6, 6 'and this bending reaction roller 8, the strand is bent in a first step. In the strand conveying direction 22 after the vertical radius beam 23 separates at the Ent Coupling point 15, the straightening roller 7, the cast strand from the start-up strand and bends the cast strand in the two straightening stages mentioned from the circular arc via an oval arc into a straight line. The position of the bending reaction roller 8 or the radius of the first bending step can be calculated in such a way that there are two partial straightening sections along the straightening section 18 with essentially the same strains on the strand surface. For example, with a 100 mm thick strand, an arc radius of 2500 mm, a length of the straightening path of at least 1000 mm, elongation changes Epsilon in% / mm on the strand surface of a maximum of 0.002 can easily be realized.

In Fig. 2 werden für gleiche Teile gleiche Bezugsziffern wie in Fig. 1 verwendet. Der starre Anfahrstrang 10 ist mit einem schwenkbaren Anfahrkopfglied 25 mit einer Schwenkachse 26 parallel zur Verschwenkachse im Kreisbogen­zentrum 9 (Fig. 1) des Anfahrstranges 10 versehen. Die Rolle 7 zum Entkuppeln des Anfahrstranges 10 vom gegosse­nen Strang 12 übt eine im wesentlichen radial zur kreisbo­genförmigen Strangbahn gerichtete Kraft auf das Anfahrkopf­glied 25 aus. Die Entkupplung kann bei diesem Beispiel früher eingeleitet und das Fussende des Stranges 12 kann dadurch besser gerichtet werden. Das Anfahrkopfglied 25 ist mit Mitteln versehen, die ein Rückkippen des Gliedes 25 in die Bogenform des Anfahrstranges 10 sicherstellen.In FIG. 2, the same reference numbers as in FIG. 1 are used for the same parts. The rigid starting line 10 is provided with a pivotable starting head member 25 with a pivot axis 26 parallel to the pivot axis in the circular arc center 9 (FIG. 1) of the starting line 10. The roller 7 for decoupling the starting strand 10 from the cast strand 12 exerts a force directed essentially radially to the circular arc-shaped strand path on the starting head member 25. In this example, the uncoupling can be initiated earlier and the foot end of the strand 12 can thus be better directed. The starting head member 25 is provided with means which ensure that the member 25 tilts back into the arc shape of the starting strand 10.

Neben der Rolle 8 ist in diesem Beispiel eine weitere Biegereaktionsrolle 8′ enthalten, die eine zusätzliche Richtstufe ergibt. Der gegossene Strang 12 wird in diesem Beispiel mittels der Rolle 7 gleichzeitig in drei Richtstu­fen gerichtet. Strichpunktiert ist die kreisbogenförmige Führungsbahn 17 des Anfahrstranges 10 dargestellt.In addition to the role 8, a further bending reaction role 8 'is included in this example, which gives an additional straightening level. In this example, the cast strand 12 is directed simultaneously in three straightening stages by means of the roller 7. The circular-arc-shaped guideway 17 of the starting strand 10 is shown in dash-dotted lines.

Claims (8)

1. Bogenstranggiessanlage für Knüppel-, Vorblock- und Pla­tinenstränge mit einer Bogenkokille (3), einer Sekundär­kühleinrichtung (5), einer Treibrichtmaschine mit Treib- (6) und Richtrollen (7, 8) und einem kreisbogenförmi­gen, starren Anfahrstrang (10) mit einer Antriebs- (11) und einer Parkvorrichtung (13), wobei der Anfahrstrang (10) an einer Entkupplungsstelle (15) mittels der Richt­rolle (7) vom gegossenen Strang (12) trennbar ist, da­durch gekennzeichnet, dass unterhalb der Führungsbahn (17) für den kreisbogenförmigen Anfahrstrang (10) zwi­schen einem auf einer kreisbogenförmigen Strangbahn angeordneten Treibrollenpaar (6, 6′) und der Entkupp­lungsstelle (15) eine oval-bogenförmige Richtstrecke (18) mit Biegereaktionsrollen (8) für den gegossenen Strang (12) vorgesehen ist.1. Continuous casting machine for billet, bloom and blank strands with an arc mold (3), a secondary cooling device (5), a driving straightening machine with driving (6) and straightening rollers (7, 8) and a circular, rigid starting strand (10) with one Drive device (11) and a parking device (13), the starting strand (10) at a decoupling point (15) being separable from the cast strand (12) by means of the straightening roller (7), characterized in that below the guideway (17) for the circular arc-shaped starting strand (10) between a pair of driving rollers arranged on an arc-shaped strand track (6, 6 ') and the decoupling point (15) is an oval-arc-shaped straightening section (18) with bending reaction rollers (8) for the cast strand (12). 2. Bogenstranggiessanlage nach Anspruch 1, dadurch gekenn­zeichnet, dass für die gerichteten Stränge eine im we­sentlichen waagrechte Ausförderstrecke (20, 20′) vorge­sehen ist und dass das Treibrollenpaar (6, 6′) auf ei­nem Radienstrahl (21) angeordnet ist, der in Stranglauf­richtung vor dem vertikalen Radienstrahl (23) liegt und zwischen beiden Radienstrahlen (21, 23) ein Winkel (Alpha) bis 30 Grad, vorzugsweise zwischen 5 - 20 Grad, vorgesehen ist.2. continuous sheet caster according to claim 1, characterized in that a substantially horizontal discharge path (20, 20 ') is provided for the directed strands and that the pair of drive rollers (6, 6') is arranged on a radiant beam (21) which is in the strand running direction lies in front of the vertical radius beam (23) and an angle (alpha) of up to 30 degrees, preferably between 5-20 degrees, is provided between the two radius rays (21, 23). 3. Bogenstranggiessanlage nach Anspruch 2, dadurch gekenn­zeichnet, dass auf dem vertikalen Radienstrahl (23) ei­ne Biegereaktionsrolle (8) der oval-bogenförmigen Richt­strecke (18) angeordnet ist.3. Continuous sheet caster according to claim 2, characterized in that a bending reaction roller (8) of the oval-arc-shaped straightening section (18) is arranged on the vertical radius beam (23). 4. Bogenstranggiessanlage nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die in Strangförderrichtung (22) nach dem vertikalen Radienstrahl (23) angeordnete Richt­rolle (7) den gegossenen Strang (12) an der Entkupp­ lungsstelle (15) gleichzeitig vom Anfahrstrang (10) trennt und in mindestens zwei Richtstufen vom Kreisbo­gen über einen Ovalbogen in eine Gerade überführt.4. continuous sheet caster according to claim 2 or 3, characterized in that the in the strand conveying direction (22) after the vertical radius beam (23) arranged straightening roller (7) the cast strand (12) on the uncoupling separation point (15) at the same time from the starting line (10) and transferred in at least two straightening stages from the circular arc via an oval arc to a straight line. 5. Bogenstranggiessanlage nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die auf dem vertikalen Radien­strahl (23) angeordnete Biegereaktionsrolle (8) die Richtstrecke (18) in zwei Teilrichtstrecken mit im wesentlichen gleichen Teildehnungen an der Strangober­fläche unterteilt ist.5. Continuous sheet caster according to claim 3 or 4, characterized in that the bending reaction roller (8) arranged on the vertical radiant beam (23) divides the straightening section (18) into two partial straightening sections with essentially the same partial expansions on the strand surface. 6. Bogenstranggiessanlage nach Anspruch 5, dadurch gekenn­zeichnet, dass die Dehnungsänderung Epsilon entlang der Richtstrecke (18) an der Strangoberfläche bei einer Strangdicke von 100 mm auf maximal 0,002 %/mm gerechnet ist.6. continuous sheet caster according to claim 5, characterized in that the change in elongation epsilon along the straightening path (18) on the strand surface is calculated at a strand thickness of 100 mm to a maximum of 0.002% / mm. 7. Bogenstranggiessanlage nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, dass der starre Anfahrstrang (10) ein schwenkbares Anfahrkopfglied (25) mit einer Schwenkachse (26) parallel zur Verschwenkachse (9) des Anfahrstranges (10) aufweist und dass die Rolle (7) zum Entkuppeln des Anfahrstranges (10) vom gegossenen Strang (12) eine im wesentlichen radial zur kreisbogen­förmigen Strangbahn (17) gerichtete Kraft auf das An­fahrkopfglied (25) ausübt.7. Continuous sheet caster according to one of claims 1-6, characterized in that the rigid starting strand (10) has a pivotable starting head member (25) with a pivot axis (26) parallel to the pivot axis (9) of the starting strand (10) and that the roller ( 7) for uncoupling the starting strand (10) from the cast strand (12) exerts a force directed radially to the arcuate strand path (17) on the starting head member (25). 8. Bogenstranggiessanlage nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, dass der Anfahrstrang (10) an seinem dem Anfahrkopf (25) gegenüberliegenden Ende mit­tels einem im Kreisbogenzentrum (9) angelenkten Schwenk­hebel (11) geführt ist.8. Continuous sheet caster according to one of claims 1-7, characterized in that the starting strand (10) is guided at its end opposite the starting head (25) by means of a pivot lever (11) articulated in the circular arc center (9).
EP89103611A 1988-03-18 1989-03-02 Bow-type continuous casting plant for billets Expired - Lifetime EP0332939B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103611T ATE71863T1 (en) 1988-03-18 1989-03-02 ARCH CONTINUOUS CASTING MACHINE FOR BILLET STRIPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1040/88A CH675975A5 (en) 1988-03-18 1988-03-18
CH1040/88 1988-03-18

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EP0332939A2 true EP0332939A2 (en) 1989-09-20
EP0332939A3 EP0332939A3 (en) 1990-09-19
EP0332939B1 EP0332939B1 (en) 1992-01-22

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EP89103611A Expired - Lifetime EP0332939B1 (en) 1988-03-18 1989-03-02 Bow-type continuous casting plant for billets

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EP (1) EP0332939B1 (en)
JP (1) JP2756133B2 (en)
AT (1) ATE71863T1 (en)
CH (1) CH675975A5 (en)
DE (1) DE58900741D1 (en)
ES (1) ES2030545T3 (en)

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Publication number Priority date Publication date Assignee Title
WO2010054243A3 (en) * 2008-11-07 2010-09-30 Saint-Gobain Performance Plastics Corporation Method of forming large diameter thermoplastic seal
US9702462B2 (en) 2008-11-07 2017-07-11 Saint-Gobain Performance Plastics Corporation Large diameter thermoplastic seal
CN107234219A (en) * 2017-07-04 2017-10-10 重庆钢铁集团设计院有限公司 Dummy bar of square billet continuous casting machine deposit method
US10093069B2 (en) 2012-05-23 2018-10-09 Saint-Gobain Performance Plastics Corporation Method of forming large diameter thermoplastic seal
CN110252982A (en) * 2019-06-28 2019-09-20 上海二十冶建设有限公司 Billet caster fan-shaped section installation adjusting method

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DE2629453A1 (en) * 1976-06-30 1978-01-05 Rokop Corp Flexible starting bar - for continuous casting apparatus, is gear-rack supported in storage position
GB2070991A (en) * 1980-02-25 1981-09-16 Concast Inc Continous casting machine
EP0099076A2 (en) * 1982-07-16 1984-01-25 Concast Service Union Ag Curved continuous-casting plant with curved rigid dummy bar and method of operating such a plant
EP0114309A1 (en) * 1982-12-20 1984-08-01 Concast Standard Ag Method of and apparatus for sealing a dummy bar head in a continuous-casting mold
DE3407391A1 (en) * 1983-03-04 1984-09-06 Continua International Continuous Casting S.p.A., Ferrara Apparatus for the continuous casting of metals, especially steel, in a curved path, using a dummy bar

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010054243A3 (en) * 2008-11-07 2010-09-30 Saint-Gobain Performance Plastics Corporation Method of forming large diameter thermoplastic seal
CN102257089A (en) * 2008-11-07 2011-11-23 美国圣戈班性能塑料公司 Method of forming large diameter thermoplastic seal
RU2481372C2 (en) * 2008-11-07 2013-05-10 Сэнт-Гобэн Перформанс Пластикс Корпорейшн Method of making seal ring (versions)
US8721823B2 (en) 2008-11-07 2014-05-13 Saint-Gobain Performance Plastics Corporation Method of forming large diameter thermoplastic seal
CN102257089B (en) * 2008-11-07 2015-03-25 美国圣戈班性能塑料公司 Method of forming large diameter thermoplastic seal
US9702462B2 (en) 2008-11-07 2017-07-11 Saint-Gobain Performance Plastics Corporation Large diameter thermoplastic seal
US10093069B2 (en) 2012-05-23 2018-10-09 Saint-Gobain Performance Plastics Corporation Method of forming large diameter thermoplastic seal
CN107234219A (en) * 2017-07-04 2017-10-10 重庆钢铁集团设计院有限公司 Dummy bar of square billet continuous casting machine deposit method
CN107234219B (en) * 2017-07-04 2018-10-23 重庆钢铁集团设计院有限公司 Dummy bar of square billet continuous casting machine deposit method
CN110252982A (en) * 2019-06-28 2019-09-20 上海二十冶建设有限公司 Billet caster fan-shaped section installation adjusting method
CN110252982B (en) * 2019-06-28 2021-05-04 上海二十冶建设有限公司 Method for installing and adjusting fan-shaped section of billet continuous casting machine

Also Published As

Publication number Publication date
EP0332939B1 (en) 1992-01-22
EP0332939A3 (en) 1990-09-19
DE58900741D1 (en) 1992-03-05
JPH02155537A (en) 1990-06-14
ATE71863T1 (en) 1992-02-15
ES2030545T3 (en) 1992-11-01
CH675975A5 (en) 1990-11-30
JP2756133B2 (en) 1998-05-25

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