EP0060484B2 - Installation for guiding a rigid starting bar - Google Patents

Installation for guiding a rigid starting bar Download PDF

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Publication number
EP0060484B2
EP0060484B2 EP82101825A EP82101825A EP0060484B2 EP 0060484 B2 EP0060484 B2 EP 0060484B2 EP 82101825 A EP82101825 A EP 82101825A EP 82101825 A EP82101825 A EP 82101825A EP 0060484 B2 EP0060484 B2 EP 0060484B2
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EP
European Patent Office
Prior art keywords
continuous casting
strand
casting installation
withdrawal
dummy bar
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Expired
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EP82101825A
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German (de)
French (fr)
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EP0060484B1 (en
EP0060484A1 (en
Inventor
Carlos Ros Navarro
José Maria Mallén Fuentes
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Concast Standard AG
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Concast Service Union AG
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Application filed by Concast Service Union AG filed Critical Concast Service Union AG
Publication of EP0060484A1 publication Critical patent/EP0060484A1/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
    • B22D11/085—Means for storing or introducing the starter bars in the moulds

Definitions

  • Continuous caster with a device for introducing a rigid, bent cold strand through a curved secondary cooling zone comprising approximately a quarter-circle arc into a mold, the cold strand being dimensioned such that when its head end closes the mold from below, its foot end with a drive roller of the driving judge on Is engaged at the end of the quarter-circle arc, a connecting device with which the foot end of the cold strand moved by the driving judge can be coupled and uncoupled to an additional transport device, with the aid of which the cold strand can be moved into a rest position after leaving the driving judge or from the rest position into the Driver can be introduced.
  • Such a continuous caster is known from DE-OS 2629453, in which the connecting device also ensures the suspension of the cold strand in its rest position.
  • the invention is therefore intended to achieve the object of providing a continuous casting installation in which the hot-strand guides for maintenance work (for example changing rollers) can be conveniently reached from above with a crane.
  • the additional transport device consists of a holding arm which can be pivoted by means of a power source and which is pivotably articulated at one end in the center of the movement path at a center and at the other end has a connecting device formed from a snap mechanism that enables an independent, locking and unlocking foot end, and that the holding arm together with the connecting device by means of the power source around the center point between a coupling position and a rest position that keeps the cold strand away from the hot strand guide and one that has access to Maintenance position releasing hot strand guide is pivotable.
  • the connecting device can also be designed such that the snap mechanism has a plate spring that can be tensioned when the cold strand is pulled out, the force of which is greater than the weight of the cold strand, but less than the sum of this weight and the tensile force of the drive judge.
  • the holding arm is advantageously designed such that it is almost vertical in the maintenance position, horizontal in the coupling position and in a central position between the two in the rest position.
  • the power source for pivoting the holding arm advantageously consists of a hydraulic cylinder.
  • a continuous casting mold 1 is arranged on a casting platform 2, to which the secondary cooling zone 6 adjoins in the casting direction, the roller guide and spraying device of which are not shown.
  • a driving straightener is arranged, which has a driving roller 7 and a bending roller 8.
  • the roller 7 is set to the strand with a defined force which is sufficient to transmit the driving force of the roller to the strand.
  • the roller 8 is also placed against the strand and under a force sufficient to straighten the arcuate strand.
  • the roller 8 is mounted in such a way that it follows the yielding strand under its force, whereby it can move in the direction of the arrow 9.
  • a support roller 10 is arranged on the opposite side of the strand, which from the position shown along the arrow 10 " is pivotable into position 10 ', where it forms part of a horizontal roller guide consisting of rollers 11.
  • the components shown so far serve to guide both the hot and the cold strand (with the exception of the rollers 11); the parts to be described now serve exclusively to guide and hold the cold strand.
  • the cold strand lying in its rest position on the rollers 12 and 13 - represented by its head end 16 and its foot end 15 - is designed as a rigid cold strand, it having an arcuate shape which makes it possible to run it along an arcuate path, the radius of which is the matches its own curvature, which is the same as the curvature of the secondary cooling zone 6.
  • the cold strand is detachably connected to a holding arm 22 by means of its foot end 15 and can be displaced by pivoting this holding arm into position 17.
  • the holding arm 22 is pivoted by means of a hydraulic cylinder 19 about the pivot point 20.
  • the hot strand is pressed down under the pressure of the roller 8 against the first of the rollers 11 and is thus straightened, while the head end of the cold strand is supported by the roller 10 .
  • the head end of the cold strand is shaped in such a way that it is firmly connected to the hot strand by train, but is easily detachable by shearing.
  • the hot strand thus directed now abuts horizontally against the roller 10, which is supported only against vertically occurring forces, and pivots it into the position 10 ', in which it forms part of the horizontal roller guide consisting of the rollers 11.
  • the cold strand is continued without interruption until the holding arm 22 reaches position 17.
  • the head end then remains in position 16, supported by the roller 12, where it no longer interferes with the movement of the warm strand.
  • the holding arm 22 is designed and mounted in such a way that, after the cold strand has been brought into the position 15 ", 16", it can be folded up into the position 17 ", and after the hydraulic cylinder 19 has been released, it is pulled up by means of the crane mentioned and secured in this position in a manner not shown.
  • This securing can take place by means of a snap mechanism or the like. After securing, the crane can be pulled off the holding arm 22 and used for the maintenance work. After the end, the holding arm 22 is reversed in the order of the working steps lowered into the horizontal position.
  • the cold strand remains in its position 15 ", 16" until the next sprue.
  • FIG. 1 shows in detail the connecting device 18 of FIG. 1, which automatically connects the foot end 30 of the cold strand to the holding arm 22.
  • the foot end 30 of the cold strand guided between rollers 31 and 32 has a notched stop surface 33 and a nose 43.
  • the connecting device consists of a rocker arm 34 mounted on a rocker arm 35, a spiral spring 37 holding the rocker arm and the rocker arm in a certain relative position to one another, and a plate spring 46 which tries to hold the rocker arm with great force in one of its two extreme positions.
  • An armature 45 of a Telller spring 46 is articulated on the pivot lever 35 by means of a bearing pin 44, which biases the pivot lever into the rest position.
  • the plate spring 46 is mounted in a housing 48 and is tensioned by means of a flange 47 fastened to the armature 45. When the foot part 30 moves downward, the force of the plate spring must be overcome via the levers 34 and 35.
  • the cold strand has a weight of 2000 kg
  • the force of the drive rollers in the drive straightener is approximately 4000 kg
  • the force of the plate spring is therefore somewhat less than 6000 kg, in order to enable the cold strand to be pulled out properly, since the pulling force is the sum is the weight of the hanging cold strand and the tensile force of the driving judge.
  • the pin 44 Since the path of the pin 44 from its rest position to the position 44 " does not run straight but on a circle with the center in the pin 38, the pin 44 must either be guided in an elongated hole in the pivot lever 35, or the plate spring housing 48 must be pivotable on the holding arm 17 'be attached.
  • the rocking lever 34 When the foot end 30 is moved into the connecting device, the rocking lever 34 is pivoted counterclockwise into the position 34 'through its inclined surface 49 under a movable pivot point 39, the coil spring 37 being tensioned, which is moved from the pin 38 to a pin only connected to the rocker arm 34 40 is excited.
  • the foot end 30 is retracted so far (position 30 ' ) that the rocker arm 34, after sliding off the nose 43', can return to its rest position, in which the foot end secures against an undesired downward movement.
  • the connecting device described works independently with regard to the engagement of the foot end and can also be solved automatically by exceeding a predetermined tractive force threshold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Metal Rolling (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Description

Stranggiessanlage mit einer Einrichtung zum Einführen eines starren, gebogenen Kaltstranges durch eine gebogene, etwa einen Viertelkreisbogen umfassende Sekundärkühlzone in eine Kokille, wobei der Kaltstrang so bemessen ist, dass, wenn sein Kopfende die Kokille von unten verschliesst, sein Fussende mit einer Treibrolle des Treibrichters am Ende des Viertelkreisbogens im Eingriff steht, einer Verbindungseinrichtung, mit welcher das Fussende des durch den Treibrichter bewegten Kaltstranges an eine zusätzliche Transporteinrichtung an- und abkuppelbar ist, mit deren Hilfe der Kaltstrang nach Verlassen des Treibrichters in eine Ruhelage bewegbar bzw. aus der Ruhelage in den Treibrichter einführbar ist.Continuous caster with a device for introducing a rigid, bent cold strand through a curved secondary cooling zone comprising approximately a quarter-circle arc into a mold, the cold strand being dimensioned such that when its head end closes the mold from below, its foot end with a drive roller of the driving judge on Is engaged at the end of the quarter-circle arc, a connecting device with which the foot end of the cold strand moved by the driving judge can be coupled and uncoupled to an additional transport device, with the aid of which the cold strand can be moved into a rest position after leaving the driving judge or from the rest position into the Driver can be introduced.

Eine derartige Stranggiessanlage ist aus der DE-OS 2629453 bekannt, bei der die Verbindungseinrichtung zugleich auch die Aufhängung des Kaltstranges in seiner Ruheposition gewährleistet.Such a continuous caster is known from DE-OS 2629453, in which the connecting device also ensures the suspension of the cold strand in its rest position.

Bei dieser Art von Kaltstrangantrieb ist es nachteilig, dass der Kaltstrang mit dem abgehängten Warmstrang bis in seine Ruhelage gefördert werden muss, wobei einerseits bei Erreichen dieser Ruhelage durch einen Endschalter ein Signal zur Unterbrechung des Antriebs, welcher in dieser Phase bereits auf den Warmstrang wirkt, der den Kaltstrang vor sich herschiebt, erzeugt werden muss, und dass andererseits der Kopf des Warmstranges in diesem Augenblick bereits relativ weit von der horizontalen Tangente des Warmstranges entfernt ist und eine entsprechend grosse Energie zum Geraderichten des Stranges notwendig ist, da der Kaltstrang weit genug aus den Warmstrangführungen herausgeführt werden muss.With this type of cold-strand drive, it is disadvantageous that the cold-strand must be conveyed to its rest position with the suspended warm-strand, and on the one hand, when this rest position is reached, a limit switch signals a signal to interrupt the drive, which already acts on the warm strand in this phase. which pushes the cold strand in front of it, must be generated, and that on the other hand the head of the warm strand is already relatively far away from the horizontal tangent of the warm strand at this moment and a correspondingly large amount of energy is required to straighten the strand, since the cold strand extends far enough the hot strand guides must be led out.

Dieser Nachteil wurde bei einer Anlage nach der US-PS 3344844 bereits eliminiert, bei welcher der Kaltstrang nach Verlassen der Treibrollen mittels eines Seilzuges in seine Ruhelage gezogen wird, wobei das Ausklinken des Warmstranges an einem der horizontalen Tangente nahen Ort geschieht. Der Nachteil dieser Konstruktion wie auch ein weiterer Nachteil nach der DE-OS 2629453 sowie weiterer Anlagen - wie beispielsweise in der DE-OS 2714338, US-PS 4073383 oder US-PS 3628595 beschrieben - liegt darin, dass die diversen Führungs- und Antriebseinrichtungen für den Kaltstrang in unbeweglicher Weise über den Warmstrangführungen angeordnet sind, so dass es schwierig oder unmöglich ist, an die Warmstrangführungen von oben her mittels eines Krans heranzukommen, was bei Reparatur- und Wartungsarbeiten von grossem Wert wäre.This disadvantage has already been eliminated in a system according to US Pat. No. 3,344,844, in which the cold strand is pulled into its rest position by means of a cable after leaving the driving rollers, the hot strand being released at a location close to the horizontal tangent. The disadvantage of this construction as well as a further disadvantage according to DE-OS 2629453 and other systems - as described for example in DE-OS 2714338, US-PS 4073383 or US-PS 3628595 - is that the various guide and drive devices for the cold strand is immovably arranged over the hot strand guides, so that it is difficult or impossible to access the hot strand guides from above by means of a crane, which would be of great value for repair and maintenance work.

Die Erfindung soll daher die Aufgabe lösen, eine Stranggiessanlage bereitzustellen, bei welcher die Warmstrangführungen für Wartungsarbeiten (z. B. Auswechseln von Rollen) bequem von oben her mit einem Kran erreicht werden können.The invention is therefore intended to achieve the object of providing a continuous casting installation in which the hot-strand guides for maintenance work (for example changing rollers) can be conveniently reached from above with a crane.

Diese Aufgabe wird erfindungsgemäss mit einer Stranggiessanlage der eingangs genannten Art gelöst, welche ferner dadurch gekennzeichnet ist, dass die zusätzliche Transporteinrichtung aus einem mittels einer Kraftquelle verschwenkbaren Haltearm besteht, der an einem Ende im Zentrum der Bewegungsbahn an einem Mittelpunkt schwenkbar angelenkt ist, am andern Ende eine aus einem, ein selbständiges, ver- und entriegelndes Fussende ermöglichenden Schnappmechanismus gebildete Verbindungseinrichtung aufweist, und dass der Haltearm zusammen mit der Verbindungseinrichtung mittels der Kraftquelle um den Mittelpunkt zwischen einer Kupplungsposition und einer den Kaltstrang von der Warmstrangführung entfernt haltenden Ruhelage sowie einer den Zugang zur Warmstrangführung freigebenden Wartungsposition verschwenkbar ist.This object is achieved according to the invention with a continuous casting installation of the type mentioned at the outset, which is further characterized in that the additional transport device consists of a holding arm which can be pivoted by means of a power source and which is pivotably articulated at one end in the center of the movement path at a center and at the other end has a connecting device formed from a snap mechanism that enables an independent, locking and unlocking foot end, and that the holding arm together with the connecting device by means of the power source around the center point between a coupling position and a rest position that keeps the cold strand away from the hot strand guide and one that has access to Maintenance position releasing hot strand guide is pivotable.

Die Verbindungseinrichtung kann ferner derart ausgebildet sein, dass der Schnappmechanismus eine beim Ausziehen des Kaltstranges spannbare Tellerfeder aufweist, deren Kraft grösser als das Gewicht des Kaltstranges, jedoch kleiner als die Summe aus diesem Gewicht und der Zugkraft des Treibrichters ist.The connecting device can also be designed such that the snap mechanism has a plate spring that can be tensioned when the cold strand is pulled out, the force of which is greater than the weight of the cold strand, but less than the sum of this weight and the tensile force of the drive judge.

Der Haltearm ist günstigerweise derart ausgebildet, dass er in der Wartungsposition nahezu senkrecht steht, in der Kuppelposition horizontal und in der Ruheposition zwischen diesen beiden in einer Mittellage liegt.The holding arm is advantageously designed such that it is almost vertical in the maintenance position, horizontal in the coupling position and in a central position between the two in the rest position.

Er ist vorteilhafter als Wartungslaufsteg ausgebildet.It is advantageously designed as a maintenance catwalk.

Die Kraftquelle zum Verschwenken des Haltearmes besteht günstigerweise aus einem Hydraulikzylinder.The power source for pivoting the holding arm advantageously consists of a hydraulic cylinder.

Die Erfindung ist anhand der Zeichnung beispielsweise dargestellt, wobei die

  • Fig. 1 eine erfindungsgemässe Stranggiessanlage von der Seite, und die
  • Fig.2 die Verbindungseinrichtung zwischen Haltearm und Kaltstrang zeigt.
The invention is illustrated with reference to the drawing, for example, the
  • Fig. 1 shows an inventive continuous caster from the side, and
  • 2 shows the connecting device between the holding arm and the cold strand.

Die Fig. 1 zeigt die für die Erfindung wesentlichen Teile einer Stranggiessanlage. Auf einer Giessbühne 2 ist eine Stranggiesskokille 1 angeordnet, an die sich in Giessrichtung nachfolgend die Sekundärkühlzone 6 anschliesst, deren Rollenführung und Sprüheinrichtung nicht dargestellt sind. In bekannter Weise ist am Ende des Viertelkreisbogens der Sekundärkühlzone 6 ein Treibrichter angeordnet, welcher eine Treibrolle 7 und eine Biegerolle 8 aufweist. Die Rolle 7 ist mit einer definierten Kraft an den Strang angestellt, die ausreicht, um die Treibkraft der Rolle auf den Strang zu übertragen. Die Rolle 8 ist ebenso gegen den Strang angestellt und zwar unter einer Kraft, die zum Geradebiegen des kreisbogenförmigen Stranges ausreicht. Zum letztgenannten Zweck ist die Rolle 8 derart gelagert, dass sie unter ihrer Kraft dem nachgebenden Strang folgt, wobei sie sich in Richtung des Pfeils 9 verschieben kann. Eine kurze Strecke nach der Rolle 8 ist auf der ihr gegenüberliegenden Seite des Stranges eine Stützrolle 10 angeordnet, welche von der gezeichneten Position entlang des Pfeils 10" in die Position 10' schwenkbar ist, wo sie einen Teil einer aus Rollen 11 bestehenden horizontalen Rollenführung bildet.1 shows the parts of a continuous casting installation that are essential for the invention. A continuous casting mold 1 is arranged on a casting platform 2, to which the secondary cooling zone 6 adjoins in the casting direction, the roller guide and spraying device of which are not shown. In a known manner, at the end of the quarter-circle arc of the secondary cooling zone 6, a driving straightener is arranged, which has a driving roller 7 and a bending roller 8. The roller 7 is set to the strand with a defined force which is sufficient to transmit the driving force of the roller to the strand. The roller 8 is also placed against the strand and under a force sufficient to straighten the arcuate strand. For the latter purpose, the roller 8 is mounted in such a way that it follows the yielding strand under its force, whereby it can move in the direction of the arrow 9. A short distance after the roller 8, a support roller 10 is arranged on the opposite side of the strand, which from the position shown along the arrow 10 " is pivotable into position 10 ', where it forms part of a horizontal roller guide consisting of rollers 11.

Die bisher dargestellten Komponenten dienen sowohl der Führung des Warm- wie auch des Kaltstranges (mit Ausnahme der Rollen 11); die nunmehr zu beschreibenden Teile dienen ausschliesslich der Führung und Halterung des Kaltstranges. Der in seiner Ruhestellung auf den Rollen 12 und 13 aufliegende Kaltstrang - dargestellt durch sein Kopfende 16 und sein Fussende 15 - ist als starrer Kaltstrang ausgebildet, wobei er eine kreisbogenförmige Gestalt aufweist, die es ermöglicht, ihn entlang einer kreisbogenförmigen Bahn, deren Radius mit dem seiner eigenen Krümmung übereinstimmt, welche gleich ist der Krümmung der Sekundärkühlzone 6, zu verschieben.The components shown so far serve to guide both the hot and the cold strand (with the exception of the rollers 11); the parts to be described now serve exclusively to guide and hold the cold strand. The cold strand lying in its rest position on the rollers 12 and 13 - represented by its head end 16 and its foot end 15 - is designed as a rigid cold strand, it having an arcuate shape which makes it possible to run it along an arcuate path, the radius of which is the matches its own curvature, which is the same as the curvature of the secondary cooling zone 6.

Der Kaltstrang ist mittels seines Fussendes 15 in lösbarer Weise mit einem Haltearm 22 verbunden und ist, durch Verschwenken dieses Haltearms in die Position 17, verschiebbar. Die Verschwenkung des Haltearms 22 erfolgt mittels eines Hydraulikzylinders 19 um den Drehpunkt 20.The cold strand is detachably connected to a holding arm 22 by means of its foot end 15 and can be displaced by pivoting this holding arm into position 17. The holding arm 22 is pivoted by means of a hydraulic cylinder 19 about the pivot point 20.

Die Funktionsweise der Anlage ist die folgende:

  • Vor Beginn des Giessens befindet sich der Kaltstrang in seiner Ruheposition, wobei das Kopfende die Position 16, das Fussende die Position 15 und der Haltearm 22 die Position 17 einnehmen. Durch kontrolliertes Entspannen des Hydraulikzylinders 19 wird der Haltearm 22 in die waagerechte Lage 17' abgesenkt, wobei das Fussende in die Position 15' und das Kopfende in die Position 16' gelangen. In dieser Position ist das Kopfende bereits in die Treibrichterrollen 7 und 8 und die entsprechenden nicht dargestellten Gegenrollen eingeführt, so dass die weitere Bewegung des Kaltstranges von diesen übernommen werden kann. Unter dem Antrieb der Rolle 7 wird das Fussende vorerst aus der Verbindungseinrichtung 18, welche mit dem Haltearm 22 verbunden ist, gelöst und solange weiter gefördert, bis das Kopfende in die, die Kokille 1 von unten verschliessende Position 16" gelangt. Die Länge des Kaltstranges muss so bemessen sein, dass in dieser Lage das Fussende 15" noch im Eingriff mit der Rolle 7 und ihrer Gegenrolle steht. Zum Giessbeginn wird sodann durch Umkehrung der Drehrichtung der Rolle 7 der Kaltstrang von der Kokille weggezogen, wobei er in bekannter Weise den Warmstrang mitzieht. Kurz bevor das Kopfende des Kaltstranges in den Treibrichter eintritt, erreicht das Fussende, geführt durch Führungsbleche 14, die Position 15', wobei es selbsttätig in die Verbindungseinrichtung 18 einrastet. Die weitere Rückzugbewegung wird nun durch das Hochschwenken des Haltearms 22 in die Position 17 unterstützt, bzw. nachdem das Kopfende 16 die Treibrolle 7 verlassen hat, allein durchgeführt.
The system works as follows:
  • Before the casting begins, the cold strand is in its rest position, with the head end in position 16, the foot end in position 15 and the holding arm 22 in position 17. By controlled relaxation of the hydraulic cylinder 19, the holding arm 22 is lowered into the horizontal position 17 ', with the foot end in position 15' and the head end in position 16 '. In this position, the head end is already inserted in the driving-judge rollers 7 and 8 and the corresponding counter-rollers, not shown, so that the further movement of the cold strand can be taken over by them. Under the drive of the roller 7, the foot end is initially released from the connecting device 18, which is connected to the holding arm 22, and continues to be conveyed until the head end reaches the position 16 "which closes the mold 1 from below. The length of the cold strand must be such that in this position the foot end 15 "is still in engagement with the roller 7 and its counter roller. At the start of casting, the cold strand is then pulled away from the mold by reversing the direction of rotation of the roller 7, pulling the hot strand along in a known manner. Shortly before the head end of the cold strand enters the drive judge, the foot end, guided by guide plates 14, reaches position 15 ' , whereby it automatically engages in the connecting device 18. The further retraction movement is now supported by the pivoting of the holding arm 22 into the position 17, or after the head end 16 has left the drive roller 7, carried out alone.

Wenn die Schnittstelle zwischen Kalt- und Warmstrang zwischen die Rollen 8 und 10 gelangt, so wird der Warmstrang unter dem Druck der Rolle 8 nach unten gegen die erste der Rollen 11 gedrückt und somit geradegerichtet, während das Kopfende des Kaltstranges durch die Rolle 10 gestützt wird. In bekannter Weise ist das Kopfende des Kaltstranges derart geformt, dass es mit dem Warmstrang auf Zug fest verbunden, durch eine Scherung jedoch leicht lösbar ist. Der derart gerichtete Warmstrang stösst nun horizontal gegen die Rolle 10, welche nur gegen vertikal auftretende Kräfte abgestützt ist, und schwenkt sie in die Position 10', in der sie einen Teil der aus den Rollen 11 bestehenden horizontalen Rollenführung bildet. Der Kaltstrang wird ohne Unterbrechung weitergezogen, bis der Haltearm 22 die Position 17 erreicht. Das Kopfende bleibt dann in der Position 16, gestützt von der Rolle 12, wo es die Bewegung des Warmstranges nicht mehr stört.When the interface between the cold and hot strands gets between the rollers 8 and 10, the hot strand is pressed down under the pressure of the roller 8 against the first of the rollers 11 and is thus straightened, while the head end of the cold strand is supported by the roller 10 . In a known manner, the head end of the cold strand is shaped in such a way that it is firmly connected to the hot strand by train, but is easily detachable by shearing. The hot strand thus directed now abuts horizontally against the roller 10, which is supported only against vertically occurring forces, and pivots it into the position 10 ', in which it forms part of the horizontal roller guide consisting of the rollers 11. The cold strand is continued without interruption until the holding arm 22 reaches position 17. The head end then remains in position 16, supported by the roller 12, where it no longer interferes with the movement of the warm strand.

Wenn es nötig ist, Wartungs- oder Reparaturarbeiten an der Rollenführung oder am Treibrichter oder sonstwo in diesem Bereich auszuführen, ist es von grossem Vorteil, den Raum über dem Arbeitsbereich zum Einführen eines nicht dargestellten Krans freimachen zu können. Zu diesem Zweck ist der Haltearm 22 so ausgebildet und gelagert, dass er, nachdem der Kaltstrang in die Lage 15", 16" gebracht wurde, in die Lage 17" hochgeklappt werden kann, wobei er nach Ausklinken des Hydraulikzylinders 19 mittels des genannten Krans hochgezogen und in dieser Lage in nicht dargestellter Weise gesichert wird. Diese Sicherung kann durch einen Schnappmechanismus oder ähnliches erfolgen. Nach dem Sichern kann der Kran vom Haltearm 22 abgezogen und zu den Wartungsarbeiten verwendet werden. Nach deren Ende wird unter umgekehrter Reihenfolge der Arbeitsschritte der Haltearm 22 in die waagerechte Lage abgesenkt.If it is necessary to carry out maintenance or repair work on the roller guide or on the drive judge or elsewhere in this area, it is of great advantage to be able to clear the space above the work area for the insertion of a crane, not shown. For this purpose, the holding arm 22 is designed and mounted in such a way that, after the cold strand has been brought into the position 15 ", 16", it can be folded up into the position 17 ", and after the hydraulic cylinder 19 has been released, it is pulled up by means of the crane mentioned and secured in this position in a manner not shown. This securing can take place by means of a snap mechanism or the like. After securing, the crane can be pulled off the holding arm 22 and used for the maintenance work. After the end, the holding arm 22 is reversed in the order of the working steps lowered into the horizontal position.

Der Kaltstrang bleibt in seiner Lage 15", 16" bis zum nächsten Anguss.The cold strand remains in its position 15 ", 16" until the next sprue.

Die Fig. zeigt im Detail die Verbindungseinrichtung 18 der Fig. 1, welche das Fussende 30 des Kaltstranges in selbsttätiger Weise mit dem Haltearm 22 verbindet.1 shows in detail the connecting device 18 of FIG. 1, which automatically connects the foot end 30 of the cold strand to the holding arm 22.

Das zwischen Rollen 31 und 32 geführte Fussende 30 des Kaltstranges weist eine eingekerbte Anschlagfläche 33 sowie eine Nase 43 auf. Die Verbindungseinrichtung besteht aus einem auf einem Schwenkhebel 35 gelagerten Kipphebel 34, einer den Kipp- und den Schwenkhebel in einer bestimmten Relativlage zueinander haltenden Spiralfeder 37 sowie einer Tellerfeder 46, welche den Schwenkhebel mit grosser Kraft in einer seiner beiden Extremlagen zu halten sucht.The foot end 30 of the cold strand guided between rollers 31 and 32 has a notched stop surface 33 and a nose 43. The connecting device consists of a rocker arm 34 mounted on a rocker arm 35, a spiral spring 37 holding the rocker arm and the rocker arm in a certain relative position to one another, and a plate spring 46 which tries to hold the rocker arm with great force in one of its two extreme positions.

In der Ruhelage der Verbindungseinrichtung, welche sowohl bei eingerastetem als auch bei ausgefahrenem Kaltstrang eingenommen wird, befinden sich alle Teile in der mit ausgezogenen Strichen gezeichneten Lage. Ausgehend von der eingerasteten Lage des Fussendes 30 wird dieses nach unten gezogen und drückt dabei gegen den Kipphebel 34, welcher bis in die gestrichelte gezeichnete Position 34" im Uhrzeigersinn gedreht wird. Der mittels eines Lagerstifts 39 auf dem Schwenkhebel drehbar gelagerte Kipphebel 34 kann sich jedoch im Uhrzeigersinn nicht gegen den Schwenkhebel 45 verdrehen, da er gegen einen Anschlag 36 des Schwenkhebels angestellt ist, so dass unter der Abwärtsbewegung des Fussendes 30 daher der Kipphebel 34 und der Schwenkhebel 35 zusammen um den Lagerstift 38, an dem der Schwenkhebel 35 drehbar gelagert ist, in die Positionen 34" und 35" geschwenkt werden. Mittels eines Lagerstifts 44 ist am Schwenkhebel 35 ein Anker 45 einer Telllerfeder 46 angelenkt, welche den Schwenkhebel in die Ruhelage vorspannt. Die Tellerfeder 46 ist in einem Gehäuse 48 gelagert und wird mittels eines am Anker 45 befestigten Flansches 47 gespannt. Bei einer Abwärtsbewegung des Fussteils 30 muss über die Hebel 34 und 35 die Kraft der Tellerfeder überwunden werden. In einer Ausführungsart der Einrichtung weist der Kaltstrang ein Gewicht von 2000 kg auf, die Kraft der Treibrollen im Treibrichter beträgt etwa 4000 kg und die Kraft der Tellerfederdaher etwas weniger als 6000 kg, um ein einwandfreies Ausziehen des Kaltstranges zu ermöglichen, da die Ausziehkraft die Summe aus dem Gewicht des hängenden Kaltstranges und der Zugkraft des Treibrichters ist.In the rest position of the connecting device, which is used both when the cold strand is engaged and when it is extended, all parts are in the position drawn with solid lines. Starting from the locked position of the foot end 30, it is pulled downward and in doing so presses against the rocker arm 34, which is rotated clockwise into the position 34 "shown in broken lines. The rocker arm 34 rotatably mounted on the swivel arm by means of a bearing pin 39 However, it cannot turn clockwise against the pivot lever 45, since it is positioned against a stop 36 of the pivot lever, so that the rocker arm 34 and the pivot lever 35 together around the bearing pin 38 on which the pivot lever 35 is rotatably mounted, can be pivoted into positions 34 "and 35". An armature 45 of a Telller spring 46 is articulated on the pivot lever 35 by means of a bearing pin 44, which biases the pivot lever into the rest position. The plate spring 46 is mounted in a housing 48 and is tensioned by means of a flange 47 fastened to the armature 45. When the foot part 30 moves downward, the force of the plate spring must be overcome via the levers 34 and 35. In one embodiment of the device, the cold strand has a weight of 2000 kg, the force of the drive rollers in the drive straightener is approximately 4000 kg and the force of the plate spring is therefore somewhat less than 6000 kg, in order to enable the cold strand to be pulled out properly, since the pulling force is the sum is the weight of the hanging cold strand and the tensile force of the driving judge.

Wenn die Nase 43" des Fussendes 33" an der Kante des Kipphebels in der Position 34" vorbeigekommen ist, so schlägt die gesamte Verbindungseinrichtung in ihre Ruhelage zurück, wobei es vorteilhaft ist, die hierbei frei werdende Energie entsprechend abzufangen, indem beispielsweise eine nicht dargestellte Gegenfeder im Gehäuse 48 angeordnet wird.When the nose 43 "of the foot end 33" has come past the edge of the rocker arm in the position 34 ", the entire connecting device returns to its rest position, it being advantageous to appropriately absorb the energy released in this way, for example by not shown Counter spring is arranged in the housing 48.

Da die Bahn des Stiftes 44 von seiner Ruhelage in die Position 44" nicht geradlinig sondern auf einem Kreis mit dem Mittelpunkt im Stift 38 verläuft, muss der Stift 44 entweder in einem Langloch im Schwenkhebel 35 geführt sein, oder das Tellerfedergehäuse 48 muss schwenkbar am Haltearm 17' befestigt sein.Since the path of the pin 44 from its rest position to the position 44 " does not run straight but on a circle with the center in the pin 38, the pin 44 must either be guided in an elongated hole in the pivot lever 35, or the plate spring housing 48 must be pivotable on the holding arm 17 'be attached.

Beim Einfahren des Fussendes 30 in die Verbindungseinrichtung wird durch dessen Schrägfläche 49 der Kipphebel 34 unter beweglichem Drehpunkt 39 gegen den Uhrzeiger in die Position 34' verschwenkt, wobei die Spiralfeder 37 gespannt wird, welche vom Stift 38 zu einem nur mit dem Kipphebel 34 verbundenen Stift 40 gespannt ist. Das Fussende 30 wird so weit eingefahren (Position 30'), dass der Kipphebel 34 nach Abgleiten an der Nase 43' wieder in seine Ruhelage zurückkehren kann, in der das Fussende gegen eine ungewollte Abwärtsbewegung sichert.When the foot end 30 is moved into the connecting device, the rocking lever 34 is pivoted counterclockwise into the position 34 'through its inclined surface 49 under a movable pivot point 39, the coil spring 37 being tensioned, which is moved from the pin 38 to a pin only connected to the rocker arm 34 40 is excited. The foot end 30 is retracted so far (position 30 ' ) that the rocker arm 34, after sliding off the nose 43', can return to its rest position, in which the foot end secures against an undesired downward movement.

Die beschriebene Verbindungseinrichtung arbeitet selbständig bezüglich des Einrastens des Fussendes und kann durch Überschreiten einer vorgegebenen Zugkraftschwelle auch selbsttätig gelöst werden.The connecting device described works independently with regard to the engagement of the foot end and can also be solved automatically by exceeding a predetermined tractive force threshold.

Claims (6)

1. A continuous casting installation with a device for introducing a curved, rigid dummy bar (15,16) through a curved secondary cooling zone (6) comprising about one quarter of a circle into a mould (1), the dummy bar (15,16) being such that when its top (16) closes the mould from the bottom, its foot engages with a drive roller (7) of a withdrawal and straightening means at the end of the quarter of a circle, a connecting device (18) with which the foot of the dummy bar moved by the withdrawal and straightening means can be coupled to and uncoupled from an additional conveying means (19, 22), with the aid of which the dummy bar (15, 16), after having left the withdrawal and straightening means (7, 8), can be moved into a rest position or can be introduced from the rest position into the withdrawal and straightening means, characterized in that the additional conveying means consists of a retaining arm (22), which can be swung by means of a power source (19), is swingably linked at one to a centre point (20) in the centre of the path of movement and has, at the other end, a connecting device (18) formed by a snapaction mechanism (34, 35, 37) which permits automatic locking and unlocking of the foot (15), and in that the retaining arm (22), together with the connecting device (18), can be swung by means of the power source (19) about the centre point (20) between a coupling position (17') and a rest position in which the dummy bar (15,16) is held at a distance from the hot bar guide (7, 8, 11), as well as into an inspection position (17") in which the entrance to the hot bar guide is uncovered.
2. A continuous casting installation according to claim 1, characterized in that the snap-action mechanism (34, 35, 37) comprises a cup spring (46) opposing withdrawal movement of the foot (15).
3. A continuous casting installation according to claim 2, characterized in that the force of the cup spring is less, by an added safety amount, than the sum of the weight of the dummy bar (15, 16) and the traction forces of the drive rollers (7, 9).
4. A continuous casting installation according to any one of claims 1-3, chracterized in that the coupling position (17') of the retaining arm (22) corresponds to a horizontal position, the inspection position (17") to a substantially vertical position, and the rest position (17) to a median position between the two others.
5. A continuous casting installation according to any one of claims 1-4, characterized in that retaining arm (22) is designed as an inspection cat- walk.
6. A continuous casting installation according to any one of claims 1-5, characterized in that the power source (19) is constituted by a hydraulic cylinder.
EP82101825A 1981-03-12 1982-03-08 Installation for guiding a rigid starting bar Expired EP0060484B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1689/81 1981-03-12
CH1689/81A CH652627A5 (en) 1981-03-12 1981-03-12 CONTINUOUS CASTING PLANT.

Publications (3)

Publication Number Publication Date
EP0060484A1 EP0060484A1 (en) 1982-09-22
EP0060484B1 EP0060484B1 (en) 1984-09-19
EP0060484B2 true EP0060484B2 (en) 1988-11-17

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ID=4216300

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Application Number Title Priority Date Filing Date
EP82101825A Expired EP0060484B2 (en) 1981-03-12 1982-03-08 Installation for guiding a rigid starting bar

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US (1) US4478271A (en)
EP (1) EP0060484B2 (en)
JP (1) JPS57159249A (en)
CA (1) CA1189677A (en)
CH (1) CH652627A5 (en)
DE (1) DE3260764D1 (en)
ES (1) ES510889A0 (en)
ZA (1) ZA821620B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4590984A (en) * 1981-11-27 1986-05-27 Sms Concast Inc. Dummy bar disconnecting arrangement
US4660616A (en) * 1986-02-26 1987-04-28 Kabushiki Kaisha Kobe Seiko Sho Starter bar apparatus in a continuous casting assembly
US6441078B1 (en) 2000-03-08 2002-08-27 E. I. Du Pont De Nemours And Company Aqueous powder coat dispersions, process for their preparation and their use
CN110640101A (en) * 2019-10-30 2020-01-03 广东工业大学 Traction mechanism

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213962B (en) * 1962-07-04 1966-04-07 Demag Ag Approach bolts for continuous casting plants
US3344844A (en) * 1964-08-10 1967-10-03 Koppers Co Inc Apparatus for handling a curved continuous casting starting bar
DE1558324A1 (en) * 1966-05-28 1970-03-19 Uraslky Zd Tyazhelogo Mash Im Cold strand for continuous metal casting plant
US3628595A (en) * 1969-10-22 1971-12-21 Koppers Co Inc Pivotally mounted starter bar in a continuous casting machine
US3930533A (en) * 1975-02-27 1976-01-06 Rokop Corporation Continuous casting apparatus with flexible starting bar which is gear-rack supported in storage position
DE2629453C3 (en) * 1976-06-30 1981-01-08 Rokop Corp., Pittsburgh, Pa. (V.St.A.) Conveying and holding device for a toothed, arched start-up strand of a continuous casting machine
DE2714338C3 (en) * 1977-03-31 1984-08-02 Mannesmann AG, 4000 Düsseldorf Start-up line transport device
US4150710A (en) * 1977-11-02 1979-04-24 Concast Incorporated Dummy bar handling apparatus and method
US4214623A (en) * 1978-07-05 1980-07-29 Witteman Steel Mills Method for continuous casting of metal
AT360690B (en) * 1979-03-19 1981-01-26 Voest Alpine Ag DEVICE FOR EXTENDING AND INSERTING A START-UP STRAND IN A CONTINUOUS CASTING SYSTEM

Also Published As

Publication number Publication date
EP0060484B1 (en) 1984-09-19
ES8303146A1 (en) 1983-02-01
US4478271A (en) 1984-10-23
ES510889A0 (en) 1983-02-01
JPS57159249A (en) 1982-10-01
CH652627A5 (en) 1985-11-29
EP0060484A1 (en) 1982-09-22
ZA821620B (en) 1983-01-26
DE3260764D1 (en) 1984-10-25
CA1189677A (en) 1985-07-02

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