EP0194656B1 - Apparatus for the continuous casting of metals, expecially steel - Google Patents

Apparatus for the continuous casting of metals, expecially steel Download PDF

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Publication number
EP0194656B1
EP0194656B1 EP86103274A EP86103274A EP0194656B1 EP 0194656 B1 EP0194656 B1 EP 0194656B1 EP 86103274 A EP86103274 A EP 86103274A EP 86103274 A EP86103274 A EP 86103274A EP 0194656 B1 EP0194656 B1 EP 0194656B1
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EP
European Patent Office
Prior art keywords
support
frame
thickness
drive
casting device
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Expired
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EP86103274A
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German (de)
French (fr)
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EP0194656A1 (en
Inventor
Dietmar Lohse
Dieter Kothe
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Vodafone GmbH
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Mannesmann AG
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Priority to AT86103274T priority Critical patent/ATE38000T1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing

Definitions

  • the invention relates to a continuous metal casting device, in particular for steel castings, with a guide frame following the continuous casting mold in the casting direction, which consists of individual segments, each segment having an upper and a lower support frame, several support rollers rotatably supported on each support frame and at least individual ones Back-up rollers are driven and opposing back-up frames can be adjusted to a back-up roller spacing corresponding to the thickness of the cast strand by means of hydraulic, double-actionable main adjustment drives, which can be acted upon in pairs and which are provided in pairs, to which auxiliary adjustment drives with mechanical adjustability for fine adjustment are assigned, the thickness distance using stops arranged on the guide frame is fixable.
  • Such known from the generic DE-A 15 08 859 guide frames with main adjustment and secondary adjustment drives are used to guide and transport starting strands at the start of casting and the transport of cast strands as well as straightening curved cast strands, whereby cast strands grow beyond their target thickness or shrink below their target thickness can.
  • the strand exerts a disproportionately high clamping force in curved strand guide frames. In such a case, the cast strand can only be removed from the guide frame by opening the affected segments.
  • the main adjustment drive can reduce the strand to the desired thickness if the target thickness is exceeded, but in this situation the secondary adjustment drive cannot be prevented from increasing the thickness spacing, so that the intended effects of the main adjustment drive are doubtful. It is disadvantageous to assign such a force to the main adjustment drive that excessively deforms the cast strand when bulging in front of the support rollers. In such cases there is a risk of permanent damage to the cast structure.
  • the secondary adjustment drive is at most able to advance the top roller when the target thickness is undershot. Such a control system is unsafe and creates unstable conditions in the management framework.
  • the object of the invention is to create an adjustment system which is rigid in every thickness setting and therefore safe and nevertheless sufficiently fast.
  • the secondary adjustment drive has a drivable threaded spindle as a support means, that the threaded spindle is guided in a threaded nut and in a bush, that the bush is fitted in the area of the stop within a bush housing fastened in the upper frame and that also Threaded nut is held in the bush housing.
  • a double-bearing threaded spindle is advantageously suitable for absorbing high supporting forces.
  • Such a threaded spindle can be driven by hand if necessary.
  • two pairs of the secondary adjustment drive are arranged on the upper frame of a segment and can be actuated synchronously by means of a common drive.
  • Such a drive arrangement allows the mechanical secondary according to the expansion of a segment frame to arrange actuators on the largest possible available area and thereby a desired parallel adjustment to the counter frame, z. B. to comply with the subframe.
  • a drive motor or a downstream countershaft can be driven by means of cardan shafts and two secondary adjustment drives in each case by means of a connecting shaft running parallel to the support rollers.
  • Such an arrangement has the advantage that the drive motor can also be set up on a pedestal outside the guide frame in order to promote the exchange of an individual guide segment.
  • a further improvement of the secondary adjustment drives is that the connecting shafts each drive on a worm gear, the worm wheel being fastened on the threaded spindle and the worm on the connecting shaft.
  • such a configuration has the advantage of a sufficiently large excess setzun g sdorf between the drive and the downstream countershaft and also may provide the threaded spindle.
  • the deliberate arrangement of the worm wheel on the support means, ie on the threaded spindle is synonymous with an existing resettability in the sense of an increase in the thickness spacing, without the pressing force transmitted through the cast strand to the respective support roller being able to cause an opening on its own (self-locking effect).
  • the support means according to the invention in its form as a threaded spindle can be arranged on the inside of the main adjustment drives and therefore requires special measures in the upper frame.
  • Such a completely separate arrangement of the main adjustment drive and the secondary adjustment drive is made possible in that the bush housing used in the upper support frame is made in two parts and a first part from below and a second part from above can be inserted and fastened to the upper support frame.
  • the assembly is further facilitated by the fact that in the first part of the two-part bush housing introduced from below, the threaded nut rests upward against a fixed shoulder. The threaded nut can therefore be easily replaced if worn.
  • the metal, in particular steel continuous casting device has a (curved) guide frame 1 (Fig. 1), the z. B. consists of three arranged on a bearing frame 2 segments 3.
  • the guide frame 1 is therefore divided into segments 3 in order to be able to replace a fully adjusted segment 3 in the event of failure of one or more of the support rollers 4.
  • Each segment 3 has an upper and a lower support frame 5a and 5b.
  • On each of the support frames 5a and 5b are several, for. B. six of the support rollers 4 are rotatably mounted and adjusted to the strand vein formed by the desired thickness of the cast strand 6, the .bend of the arc being taken into account in the exemplary embodiment. With a straight cast strand 6, the alignment is understandably easier because the support rollers 4 lie there on a straight line.
  • the segments 3 form complete units which are fastened to the bearing frame 2 by means of hydraulic tensioning devices 7.
  • Rotary drives (not shown) are provided for some of the support rollers 4, which are set up outside the guide frame 1. From these rotary drives, cardan shafts are guided on couplings on the pins of the support rollers 4.
  • the two opposing support frames 5a and 5b are set to a support roller spacing or thickness spacing 8 corresponding to the target thickness of the cast strand 6.
  • the adjustment is made via main adjustment drives 9, of which at least one pair is provided on each side next to the cast strand 6, with the hydraulic cylinder being fastened to the lower support frame 5b and the piston rod to the upper support frame 5a by means of a suitable joint in a hydraulic embodiment two pairs of main adjustment drives 9 are provided so that each upper support frame 5a is held on four piston rods.
  • the main adjustment drives 9 are expediently double-acting piston-cylinder units. It is of course possible to get by with only one pair of main adjustment drives 9.
  • Auxiliary adjustment drives 10 are located on the upper support frame 5a, the number of which may also vary (FIG. 1).
  • the secondary adjustment drives 10 are used for fine adjustment of the thickness spacing 8 for deviations from the target thickness of the cast strand 6.
  • FIG. 2 An enlarged representation of the main adjustment and secondary adjustment drives 9 and 10 is shown in FIG. 2.
  • the thickness spacing 8 is set by means of interchangeable stops 11, which rest on a frame part 12, which at the same time provides a protective housing 12a and 12b which prevents heat radiation the main actuators 9 forms and firmly with the lower support frame men 5b is connected.
  • the thickness surfaces of the cast strand 6 guiding plates 13a and 13b are fastened.
  • a secondary adjustment drive 10 is shown in more detail in FIGS. 3 and 4. It is located with its axis 14 parallel to the axis 15 of the main adjustment drive 9, the piston rod 9a of which is articulated in the upper support frame 5a by means of cross bolts 16.
  • the support means 17 is in contact with the stops 11 in all thickness settings. From this position it is possible to counteract an increase in the thickness of the cast strand 6 by giving in the piston rod 9a and by simultaneously (possibly differently) lowering the support means 17. As the strand thickness decreases, i.e. H. with a decreasing thickness spacing 8, the piston rod 9a and the support means 17 are adjusted accordingly downwards.
  • a fine adjustment in both directions 18a and 18b with the piston rod 9a fixed is made possible by the design of the support means 17 as a threaded spindle 19.
  • the threaded spindle 19 With the threaded part 20, the threaded spindle 19 is guided in a threaded nut 21 (FIG. 4) and in a bush 22. Both the threaded nut 21 and the bushing 22 are supported in a bush housing 23.
  • the bush housing 23 is formed from the parts 23a and 23b.
  • the first part 23a is inserted from below, the second part 23b from above into the upper support frame.
  • both parts are z. B. connected by a weld.
  • the threaded nut 21 is inserted and secured according to a similar division system in the upper part 23b.
  • a hexagon 24 is provided on the threaded spindle 19 for manual operation (FIGS. 3 and 4).
  • the support means 17 could generate an undesirable bending moment in the upper support frame 5a and in other components.
  • an insert 25, which may be detachable, is inserted on the stop 11 axially symmetrically with respect to the axes 14 and 15.
  • the secondary adjustment drive 10 is arranged symmetrically in pairs 26 (FIG. 5) on the upper support frame 5a and can be actuated synchronously by means of a common drive 27.
  • the associated drive motor 27a and a downstream countershaft transferred 28 the setting force by means of the pivot shafts 29 and 30 to the respective first side adjustment drive 10 and further to the respective second side adjustment drive 10 p ritatiswellen there by means extending parallel to the support rollers 4 V 31 and 32nd
  • the connecting shafts 31 and 32 each drive on a worm gear 33 (FIG. 2), the worm wheel 34 of which is fastened on the threaded spindle 19.
  • the worm 35 (inside the worm gear housing) is fastened on the respective connecting shaft 31 or 32.
  • FIG. 2 An alternative solution to the arrangement of the threaded spindle 19 with a threaded nut 21 is shown in FIG. 2.
  • the threaded nut 21 is fixed upward against a fixed shoulder 36.
  • this embodiment corresponds to the embodiment described for FIGS. 3 and 4.

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

Abstract

1. A continuous metal casting device, particularly for cast steel strands, with a guide frame following the continuous casting mould in the casting direction, which frame consists of individual segments, each segment having one upper and one lower support frame, several support roller being mounted on each support frame so as to pivot and at least individual support rollers being driven and opposing support frames being adjustable to a support roller distance corresponding to the thickness of the cast strand by means of hydraulic main displacement drives, provided in pairs and connecting lower and upper frames, which can be doubly acted on, to which secondary adjustment drives with the ability to be adjusted mechanically for fine adjustment are allocated, the thickness distance being able to be fixed by means of stops arranged on the guide frame, characterised in that the contact force on the stops (11) can be regulated on the one hand by the hydraulic main displacement drive (9), and on the other hand by the secondary adjustment drive (10) mounted on one of the support frames (5a, 5b), the support means (17) of which rest against the stops (11) in all thickness adjustments and with the support means (17) of which the thickness distance (8) can be finely adjusted in both positioning directions (18a and 18b).

Description

Die Erfindung betrifft eine Metallstranggießvorrichtung, insbesondere für Gußstränge aus Stahl, mit einem in Gießrichtung auf die Stranggießkokille folgenden Führungsgerüst, das aus einzelnen Segmenten besteht, wobei jedes Segment jeweils einen oberen und einen unteren Stützrahmen aufweist, an jedem Stützrahmen mehrere Stützwalzen drehbar gelagert und zumindest einzelne Stützwalzen angetrieben sind und sich gegenüberliegende Stützrahmen auf einen Stützwalzenabstand entsprechend der Dicke des Gußstranges mittels Unter- und Oberrahmen verbindender hydraulischer, doppelt beaufschlagbarer, paarweise vorgesehener Hauptverstellantriebe einstellbar sind, denen Nebeneinstellantriebe mit mechanischer Einstellbarkeit zur Feineinstellung zugeordnet sind, wobei der Dickenabstand mittels am Führungsgerüst angeordneter Anschläge fixierbar ist.The invention relates to a continuous metal casting device, in particular for steel castings, with a guide frame following the continuous casting mold in the casting direction, which consists of individual segments, each segment having an upper and a lower support frame, several support rollers rotatably supported on each support frame and at least individual ones Back-up rollers are driven and opposing back-up frames can be adjusted to a back-up roller spacing corresponding to the thickness of the cast strand by means of hydraulic, double-actionable main adjustment drives, which can be acted upon in pairs and which are provided in pairs, to which auxiliary adjustment drives with mechanical adjustability for fine adjustment are assigned, the thickness distance using stops arranged on the guide frame is fixable.

Derartige aus der gattungsbildenden DE-A 15 08 859 bekannte Führungsgerüste mit Hauptverstell- und Nebeneinstellantrieben dienen der Führung und dem Transport von Anfahrsträngen bei Gießbeginn und dem Transport von Gußsträngen sowie dem Richten von gebogenen Gubsträngen, wobei Gußstränge über ihre Solldicke hinauswachsen oder unter ihre Solldicke schrumpfen können. Bei Gießunterbrechungen übt der Strang in gebogenen Strangführungsgerüsten eine unverhältnismäßig hohe Klemmkraft aus. Der Gußstrang kann in einem solchen Fall nur durch Auffahren der betroffenen Segmente aus dem Führungsgerüst entfernt werden.Such known from the generic DE-A 15 08 859 guide frames with main adjustment and secondary adjustment drives are used to guide and transport starting strands at the start of casting and the transport of cast strands as well as straightening curved cast strands, whereby cast strands grow beyond their target thickness or shrink below their target thickness can. In the event of interruptions in casting, the strand exerts a disproportionately high clamping force in curved strand guide frames. In such a case, the cast strand can only be removed from the guide frame by opening the affected segments.

Es ist bekannt (DE-AS 19 63 146), die Jochrahmen (oberer und unterer Stützrahmen) mit den daran befestigten Stützwalzen auf den gewünschten Dickenabstand einzustellen, indem zwischen dem Oberrahmen und einem Rahmenteil des Unterrahmens Distanzstücke eingelegt sind. Hier besteht das Distanzstück aus einer Büchse mit. Ringquerschnitt und am Umfang eingearbeiteten Stufen. Eine Einstellung des Dickenabstand zwischen den Stufen ist nicht möglich.It is known (DE-AS 19 63 146) to adjust the yoke frame (upper and lower support frame) with the support rollers attached to the desired thickness distance by inserting spacers between the upper frame and a frame part of the lower frame. Here the spacer consists of a sleeve with. Ring cross-section and steps integrated into the circumference. It is not possible to set the thickness spacing between the steps.

Es ist ferner bekannt (DE-AS 21 33 144), Treib-und/oder Richtrollen eines Strangführungsgerüstes vom Solldickenmaß zum Strang hin durch zusätzliche Kraftgeräte (Kolbenzylindereinheiten) bewegbar zu gestalten, wobei die durch die Kraftgeräte erzeugte Anstellkraft kleiner ist als diejenige der Kolbenzylinder-einheiten des Hauptverstellantriebes. Die Hauptverstellantriebe sind bei dieser Lösung gegen die Anschläge gefahren (erste Stellrichtung) und die Kraftgeräte, deren Kolben mit dem Kolben der Hauptverstellantriebe gelenkig verbunden sind, können als Tellerfederpakete oder als Kolbenzylindereinheiten ausgestaltet sein, um bei fixiertem Hauptverstellantrieb den Dickenabstand zu vergrößern (zweite Stellrichtung). Ein solches System ist weich und wirkt dem Sinn und Zweck der aufwendigen Hauptverstellantriebe geradezu entgegen. Die Hauptverstellantriebe können zwar aufgrund unterschiedlich dicker Anschläge auf verschiedene Dicken eingestellt werden. In allen Einstellungen hebt der Nebeneinstellantrieb durch ein nicht ausreichend genau kontrollierbares Auf- und Zustellen der Oberwalze diesen Effekt wieder auf.It is also known (DE-AS 21 33 144) to make driving and / or straightening rollers of a strand guide scaffold movable from the nominal thickness dimension to the strand by additional force devices (piston cylinder units), the contact force generated by the force devices being smaller than that of the piston cylinder units of the main adjustment drive. With this solution, the main actuators are driven against the stops (first actuating direction) and the power devices, whose pistons are articulated to the piston of the main actuators, can be designed as disc spring assemblies or as piston-cylinder units in order to increase the thickness spacing when the main actuator is fixed (second actuating direction) . Such a system is soft and almost counteracts the purpose of the complex main adjustment drives. The main adjustment drives can be set to different thicknesses due to the different thickness of the stops. In all settings, the auxiliary adjustment drive cancels this effect by not setting the top roller in and out sufficiently precisely.

Der Hauptverstellantrieb kann bei Überschreiten der Solldicke zwar den Strang auf die Solldicke reduzieren, jedoch ist der Nebeneinstellantrieb in dieser Situation nicht davon abzuhalten, den Dickenabstand zu vergrößern, so daß die beabsichtigten Wirkungen des Hauptverstellantriebes zweifelhaft sind. Es ist schon nachteilig, dem Hauptverstellantrieb eine solche Kraft zuzuordnen, die den Gußstrang bei Aufwölbungen vor den Stützrollen übermäßig verformt. In solchen Fällen sind bleibende Schäden des Gußgefüges zu befürchten. Der Nebeneinstellantrieb ist allenfalls in der Lage, die Oberrolle bei Unterschreiten der Solldicke zuzustellen. Ein solches Regelsystem ist unsicher und schafft labile Verhältnisse im Führungsgerüst.The main adjustment drive can reduce the strand to the desired thickness if the target thickness is exceeded, but in this situation the secondary adjustment drive cannot be prevented from increasing the thickness spacing, so that the intended effects of the main adjustment drive are doubtful. It is disadvantageous to assign such a force to the main adjustment drive that excessively deforms the cast strand when bulging in front of the support rollers. In such cases there is a risk of permanent damage to the cast structure. The secondary adjustment drive is at most able to advance the top roller when the target thickness is undershot. Such a control system is unsafe and creates unstable conditions in the management framework.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, ein in jeder Dickeneinstellung starres, daher sicheres und trotzdem ausreichend schnelles Verstellsystem zu schaffen.In contrast, the object of the invention is to create an adjustment system which is rigid in every thickness setting and therefore safe and nevertheless sufficiently fast.

. Die gestellte Aufgabe wird erfindungsgemäß durch die Merkmale des Kennzeichens des Anspruchs 1 gelöst. Ein solches Verstellsystem vermeidet eine schwimmende Lagerung des oberen Stützrahmens in kritischen Phasen, falls der Gußstrang seine Solldicke vorübergehend und in kleineren Bereichen überschreiten sollte. Andererseits ist ein solches Verstellsystem im Hinblick auf die dauerhafte Anlage der Stützmittel der Nebeneinstellantriebe ausreichend starr und daher sicher. Es ist jedoch auch gewährleistet, die Oberwalzen zu den Unterwalzen schnell genug aufzufahren, und zwar um ein Maß, das im Stranggußbetrieb gefordert wird. Außerdem ist vorteilhaft, daß bei der dauerhaften Anlage der Stützmit- . tel an den Anschlägen eine parallele Lage der beiden Stützwalzen zueinander gesichert wird.. The object is achieved according to the invention by the features of the characterizing part of claim 1. Such an adjustment system avoids floating support of the upper support frame in critical phases if the cast strand should temporarily exceed its target thickness and in smaller areas. On the other hand, such an adjustment system is sufficiently rigid and therefore safe with regard to the permanent contact of the support means of the auxiliary adjustment drives. However, it is also ensured that the top rollers run up to the bottom rollers quickly enough, to an extent that is required in continuous casting operation. It is also advantageous that in the permanent system of support. tel a parallel position of the two support rollers is secured to each other at the stops.

In Weiterbildung der Erfindung wird vorgeschlagen, daß der Nebeneinstellantrieb als Stützmittel eine antreibbare Gewindespindel aufweist, daß die Gewindespindel in einer Gewindemutter und in einer Büchse geführt ist, daß die Büchse im Bereich des Anschlags innerhalb eines im oberen Rahmen befestigten Büchsengehäuses eingepaßt ist und daß auch die Gewindemutter in dem Büchsengehäuse gehalten ist. Vorteilhafterweise eignet sich eine derart doppelt gelagerte Gewindespindel für die Aufnahme von hohen Stützkräften. Eine derartige Gewindespindel kann notfalls von Hand angetrieben sein.In a further development of the invention it is proposed that the secondary adjustment drive has a drivable threaded spindle as a support means, that the threaded spindle is guided in a threaded nut and in a bush, that the bush is fitted in the area of the stop within a bush housing fastened in the upper frame and that also Threaded nut is held in the bush housing. Such a double-bearing threaded spindle is advantageously suitable for absorbing high supporting forces. Such a threaded spindle can be driven by hand if necessary.

In Weiterbildung der Erfindung ist vorgesehen, daß zwei Paare des Nebeneinstellantriebs auf dem Oberrahmen eines Segments angeordnet und mittels eines gemeinsamen Antriebs synchron betätigbar sind. Eine solche Antriebsanordnung gestattet, entsprechend der Ausdehnung eines Segmentrahmens die mechanischen Nebeneinstellantriebe auf der größtmöglichen zur Verfügung stehenden Grundfläche anzuordnen und dadurch eine gewünschte Parallelverstellung zum Gegenrahmen, z. B. zum Unterrahmen einzuhalten.In a further development of the invention it is provided that two pairs of the secondary adjustment drive are arranged on the upper frame of a segment and can be actuated synchronously by means of a common drive. Such a drive arrangement allows the mechanical secondary according to the expansion of a segment frame to arrange actuators on the largest possible available area and thereby a desired parallel adjustment to the counter frame, z. B. to comply with the subframe.

In Weiterbildung der Erfindung ist vorgesehen, daß ein Antriebsmotor bzw. ein nachgeschaltetes Vorgelege mittels Gelenkwellen und jeweils zwei Nebeneinstellantriebe mittels einer parallel zu den Stützwalzen verlaufenden Verbindungswelle antreibbar sind. Eine derartige Anordnung weist den Vorteil auf, den Antriebsmotor auch außerhalb des Führungsgerüstes auf einem Podest aufzustellen, um einen Austausch eines einzelnen Führungssegmentes zu begünstigen.In a further development of the invention it is provided that a drive motor or a downstream countershaft can be driven by means of cardan shafts and two secondary adjustment drives in each case by means of a connecting shaft running parallel to the support rollers. Such an arrangement has the advantage that the drive motor can also be set up on a pedestal outside the guide frame in order to promote the exchange of an individual guide segment.

Eine weitere Verbesserung der Nebeneinstellantriebe besteht darin, daß die,Verbindungswellen jeweils auf ein Schneckengetriebe treiben, wobei das Schneckenrad auf der Gewindespindel und die Schnecke auf der Verbindungswelle befestigt sind. Zum einen besitzt eine solche Ausgestaltung den Vorteil, ein ausreichend großes Über- setzungsverhältnis zwischen dem Antrieb bzw. dem nachgeschalteten Vorgelege einerseits und der Gewindespindel vorsehen zu können. Andererseits ist die bewußte Anordnung des Schneckenrades auf dem Stützmittel, d. h. auf der Gewindespindel gleichbedeutend mit einer vorhandenen Rückstellbarkeit im Sinne einer Vergrößerung des Dickenabstandes, ohne daß die durch den Gußstrang auf die jeweilige Stützwalze übertragene Preßkraft ein Öffnen von sich aus bewirken könne (Selbsthemmungseffekt).A further improvement of the secondary adjustment drives is that the connecting shafts each drive on a worm gear, the worm wheel being fastened on the threaded spindle and the worm on the connecting shaft. Firstly, such a configuration has the advantage of a sufficiently large excess setzun g sverhältnis between the drive and the downstream countershaft and also may provide the threaded spindle. On the other hand, the deliberate arrangement of the worm wheel on the support means, ie on the threaded spindle, is synonymous with an existing resettability in the sense of an increase in the thickness spacing, without the pressing force transmitted through the cast strand to the respective support roller being able to cause an opening on its own (self-locking effect).

Das erfindungsgemäße Stützmittel in seiner Form als Gewindespindel kann auf der Innenseite zu den Hauptverstellantrieben angeordnet sein und bedarf daher besonderer Maßnahmen im Oberrahmen. Eine solche völlig getrennte Anordnung des Hauptverstellantriebes und des Nebeneinstellantriebs wird dadurch ermöglicht, daß das in dem oberen Stützrahmen eingesetzte Büchsengehäuse zweiteilig ausgeführt ist und ein erster Teil von unten und ein zweiter Teil von oben am oberen Stützrahmen einschiebbar und befestigbar ist.The support means according to the invention in its form as a threaded spindle can be arranged on the inside of the main adjustment drives and therefore requires special measures in the upper frame. Such a completely separate arrangement of the main adjustment drive and the secondary adjustment drive is made possible in that the bush housing used in the upper support frame is made in two parts and a first part from below and a second part from above can be inserted and fastened to the upper support frame.

Die Montage wird ferner noch dadurch erleichtert, daß in dem von unten eingeführten ersten Teil des zweiteiligen Büchsengehäuses die Gewindemutter nach oben gegen einen festen Absatz anliegt. Die Gewindemutter ist daher ggf. bei Verschleiß leicht austauschbar.The assembly is further facilitated by the fact that in the first part of the two-part bush housing introduced from below, the threaded nut rests upward against a fixed shoulder. The threaded nut can therefore be easily replaced if worn.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung schematisch dargestellt und wird im folgenden näher erläutert. Es zeigen :

  • Fig. 1 eine Seitenansicht eines aus mehreren Segmenten bestehenden Führungsgerüstes einer Metallstranggießvorrichtung (ohne Stranggießkokille),
  • Fig. 2 einen Querschnitt durch ein Führungssegment in Höhe der Hauptverstellantriebe, wobei die Nebeneinstellantriebe in die Schnittebene verlegt sind,
  • Fig. 3 einen Querschnitt durch einen Teil des Segmentrahmens im Bereich des Stützmittels für den Nebeneinstellantrieb,
  • Fig. 4 einen Querschnitt zum Gegenstand gemäß Fig. 3 und
  • Fig. 5 eine Draufsicht auf einen Segmentrahmen mit paarweise angeordneten Nebeneinstellantrieben.
In the drawing, an embodiment of the invention is shown schematically and is explained in more detail below. Show it :
  • 1 is a side view of a guide frame consisting of several segments of a metal continuous casting device (without continuous casting mold),
  • 2 shows a cross section through a guide segment at the level of the main adjustment drives, the secondary adjustment drives being laid in the cutting plane,
  • 3 shows a cross section through part of the segment frame in the region of the support means for the secondary adjustment drive,
  • Fig. 4 shows a cross section to the object of FIG. 3 and
  • Fig. 5 is a plan view of a segment frame with secondary adjustment drives arranged in pairs.

Die Metall-, insbesondere Stahlstranggießvorrichtung weist ein (gebogenes) Führungsgerüst 1 auf (Fig. 1), das z. B. aus jeweils drei auf einem Lagerrahmen 2 angeordneten Segmenten 3 besteht. Das Führungsgerüst 1 ist deshalb in Segmente 3 eingeteilt, um bei Ausfall einer oder mehrerer der Stützwalzen 4 ein fertigjustiertes Segment 3 austauschen zu können.The metal, in particular steel continuous casting device has a (curved) guide frame 1 (Fig. 1), the z. B. consists of three arranged on a bearing frame 2 segments 3. The guide frame 1 is therefore divided into segments 3 in order to be able to replace a fully adjusted segment 3 in the event of failure of one or more of the support rollers 4.

Jedes Segment 3 weist einen oberen und einen unteren Stützrahmen 5a bzw. 5b auf. An jedem der Stützrahmen 5a und 5b sind mehrere, z. B. sechs der Stützwalzen 4 drehbar gelagert und hierbei auf die durch die Solldicke des Gußstrangs 6 gebildete Strangader eingestellt, wobei im Ausführungsbeispiel die .Krümmung des Bogens berücksichtigt ist. Bei einem geraden Gußstrang 6 ist die Ausrichtung verständlicherweise einfacher, weil dort die Stützwalzen 4 auf einer Geraden liegen.Each segment 3 has an upper and a lower support frame 5a and 5b. On each of the support frames 5a and 5b are several, for. B. six of the support rollers 4 are rotatably mounted and adjusted to the strand vein formed by the desired thickness of the cast strand 6, the .bend of the arc being taken into account in the exemplary embodiment. With a straight cast strand 6, the alignment is understandably easier because the support rollers 4 lie there on a straight line.

Die Segmente 3 bilden vollständige Einheiten, die mittels hydraulischer Spanneinrichtungen 7 an den Lagerrahmen 2 befestigt sind. Für einzelne der Stützwalzen 4 sind Drehantriebe (nicht gezeichnet) vorgesehen, die außerhalb des Führungsgerüstes 1 aufgestellt sind. Von diesen Drehantrieben sind Gelenkwellen an Kupplungen auf den Zapfen der Stützwalzen 4 geführt.The segments 3 form complete units which are fastened to the bearing frame 2 by means of hydraulic tensioning devices 7. Rotary drives (not shown) are provided for some of the support rollers 4, which are set up outside the guide frame 1. From these rotary drives, cardan shafts are guided on couplings on the pins of the support rollers 4.

Die zwei sich gegenüberliegenden Stützrahmen 5a und 5b sind auf einen Stützwalzenabstand bzw. Dickenabstand 8 entsprechend der Solldicke des Gußstrangs 6 eingstellt. Die Einstellung erfolgt über Hauptverstellantriebe 9, von denen zumindest ein Paar pro Seite neben dem Gußstrang 6 vorgesehen ist, wobei bei einer hydraulischen Ausführungsform der Hydraulikzylinder am unteren Stützrahmen 5b und die Kolbenstange am oberen Stützrahmen 5a mittels eines geeigneten Gelenkes befestigt sind.. im gezeichneten Ausführungsbeispiel sind zwei Paare von Hauptverstellantrieben 9 vorgesehen, so daß jeder obere Stützrahmen 5a an vier Kolbenstangen gehalten ist. Zweckmäßigerweise sind die Hauptverstellantriebe 9 doppelt beaufschlagbare Kolbenzylindereinheiten. Es ist setbstvertändtich möglich, auch nur mit einem Paar von Hauptverstellantrieben 9 auszukommen. Auf dem oberen Stützrahmen 5a befinden sich jeweils Nebeneinstellantriebe 10, wobei auch deren Anzahl (Fig. 1) variieren kann. Die Nebeneinstellantriebe 10 dienen zur Feineinstellung des Dickenabstandes 8 für Abweichungen von der Solldicke des Gußstranges 6.The two opposing support frames 5a and 5b are set to a support roller spacing or thickness spacing 8 corresponding to the target thickness of the cast strand 6. The adjustment is made via main adjustment drives 9, of which at least one pair is provided on each side next to the cast strand 6, with the hydraulic cylinder being fastened to the lower support frame 5b and the piston rod to the upper support frame 5a by means of a suitable joint in a hydraulic embodiment two pairs of main adjustment drives 9 are provided so that each upper support frame 5a is held on four piston rods. The main adjustment drives 9 are expediently double-acting piston-cylinder units. It is of course possible to get by with only one pair of main adjustment drives 9. Auxiliary adjustment drives 10 are located on the upper support frame 5a, the number of which may also vary (FIG. 1). The secondary adjustment drives 10 are used for fine adjustment of the thickness spacing 8 for deviations from the target thickness of the cast strand 6.

Eine gegenüber Fig. vergrößerte Darstellung der Hauptverstell- und Nebeneinstellantriebe 9 und 10 zeigt Fig. 2. Der Dickenabstand 8 wird über ggf. austauschbare Anschläge 11 eingestellt, die auf einem Rahmenteil 12 aufliegen, der gleichzeitig ein schützendes, Wärmestrahlung abhaltendes Gehäuse 12a und 12b für die Hauptverstellantriebe 9 bildet und fest mit dem unteren Stützrahmen 5b verbunden ist. An den Gehäusen 12a und 12b sind die Dickenflächen des Gußstranges 6 führende Platten 13a bzw. 13b befestigt.An enlarged representation of the main adjustment and secondary adjustment drives 9 and 10 is shown in FIG. 2. The thickness spacing 8 is set by means of interchangeable stops 11, which rest on a frame part 12, which at the same time provides a protective housing 12a and 12b which prevents heat radiation the main actuators 9 forms and firmly with the lower support frame men 5b is connected. On the housings 12a and 12b, the thickness surfaces of the cast strand 6 guiding plates 13a and 13b are fastened.

Ein Nebeneinstellantrieb 10 ist in den Fig. 3 und 4 genauer dargestellt. Er befindet sich mit seiner Achse 14 parallel zu der Achse 15 des Hauptverstellantriebs 9, dessen Kolbenstange 9a im oberen Stützrahmen 5a mittels Querbolzen 16 angelenkt ist. Das Stützmittel 17 befindet sich in allen Dickeneinstellungen in Kontakt mit den Anschlägen 11. Von dieser Position aus ist es möglich, einer Erhöhung der Dicke des Gußstranges 6 durch Nachgeben der Kolbenstange 9a und durch gleichzeitiges (ggf. unterschiedliches) Absenken des Stützmittels 17 entgegenzuwirken. Bei sinkender Strangdicke, d. h. bei sich verkleinerndem Dickenabstand 8 werden die Kolbenstange 9a und das Stützmittel 17 entsprechend nach unten verstellt. Eine Feineinstellung in beiden Stellrichtungen 18a und 18b bei fixierter Kolbenstange 9a wird durch die Ausführung des Stützmittels 17 als Gewindespindel 19 ermöglicht. Mit dem Gewindeteil 20 ist die Gewindespindel 19 in einer Gewindemutter 21 (Fig. 4) und in einer Büchse 22 geführt. Sowohl die Gewindemutter 21 als auch die Büchse 22 lagern in einem Büchsengehäuse 23. Das Büchsengehäuse 23 ist aus den Teilen 23a und 23b gebildet. Der erste Teil 23a wird von unten eingeschoben, der zweite Teil 23b von oben in den oberen Stützrahmen. Anschließend werden beide Teile miteinander z. B. durch eine Schweißnaht verbunden. Die Gewindemutter 21 ist hierbei nach einem ähnlichen Teilungssystem im oberen Teil 23b eingesetzt und gesichert. An der Gewindespindel 19 ist für Handbetrieb ein Sechskant 24 vorgesehen (Fig. 3 und 4). Das Stützmittel 17 könnte ein unerwünschtes Biegemoment im oberen Stützrahmen 5a und in weiteren Bauteilen erzeugen. Zur Vermeidung eines solchen übermäßigen Biegemomentes ist auf dem Anschlag 11 achsensymmetrisch zu den Achsen 14 und 15 eine ggf. lösbare Einlage 25 eingesetzt.A secondary adjustment drive 10 is shown in more detail in FIGS. 3 and 4. It is located with its axis 14 parallel to the axis 15 of the main adjustment drive 9, the piston rod 9a of which is articulated in the upper support frame 5a by means of cross bolts 16. The support means 17 is in contact with the stops 11 in all thickness settings. From this position it is possible to counteract an increase in the thickness of the cast strand 6 by giving in the piston rod 9a and by simultaneously (possibly differently) lowering the support means 17. As the strand thickness decreases, i.e. H. with a decreasing thickness spacing 8, the piston rod 9a and the support means 17 are adjusted accordingly downwards. A fine adjustment in both directions 18a and 18b with the piston rod 9a fixed is made possible by the design of the support means 17 as a threaded spindle 19. With the threaded part 20, the threaded spindle 19 is guided in a threaded nut 21 (FIG. 4) and in a bush 22. Both the threaded nut 21 and the bushing 22 are supported in a bush housing 23. The bush housing 23 is formed from the parts 23a and 23b. The first part 23a is inserted from below, the second part 23b from above into the upper support frame. Then both parts are z. B. connected by a weld. The threaded nut 21 is inserted and secured according to a similar division system in the upper part 23b. A hexagon 24 is provided on the threaded spindle 19 for manual operation (FIGS. 3 and 4). The support means 17 could generate an undesirable bending moment in the upper support frame 5a and in other components. In order to avoid such an excessive bending moment, an insert 25, which may be detachable, is inserted on the stop 11 axially symmetrically with respect to the axes 14 and 15.

Der Nebeneinstellantrieb 10 ist in Paaren 26 (Fig. 5) auf dem oberen Stützrahmen 5a symmetrisch angeordnet und mittels eines gemeinsamen Antriebs 27 synchron betätigbar. Der zugehörige Antriebsmotor 27a bzw. ein nachgeschaltetes Vorgelege 28 übertragen die Einstellkraft mittels der Gelenkwellen 29 und 30 zu dem jeweils ersten Nebeneinstellantrieb 10 und von dort weiter zu dem jeweils zweiten Nebeneinstellantrieb 10 mittels parallel zu den Stützwalzen 4 verlaufenden Vprbindungswellen 31 und 32.The secondary adjustment drive 10 is arranged symmetrically in pairs 26 (FIG. 5) on the upper support frame 5a and can be actuated synchronously by means of a common drive 27. The associated drive motor 27a and a downstream countershaft transferred 28 the setting force by means of the pivot shafts 29 and 30 to the respective first side adjustment drive 10 and further to the respective second side adjustment drive 10 p rbindungswellen there by means extending parallel to the support rollers 4 V 31 and 32nd

Die Verbindungswellen 31 und 32 treiben jeweils auf ein Schneckengetriebe 33. (Fig. 2), dessen Schneckenrad 34 auf der Gewindespindel 19 befestigt ist. Die Schnecke 35 (innerhalb des Schneckengetriebegehäuses) ist auf der jeweiligen Verbindungswelle 31 bzw. 32 befestigt.The connecting shafts 31 and 32 each drive on a worm gear 33 (FIG. 2), the worm wheel 34 of which is fastened on the threaded spindle 19. The worm 35 (inside the worm gear housing) is fastened on the respective connecting shaft 31 or 32.

In Fig. 2 ist noch eine alternative Lösung zur Anordnung der Gewindespindel 19 mit Gewindemutter 21 gezeigt. Hier ist in dem von unten in den oberen Stützrahmen 5a eingeführten ersten Teil 23a die Gewindemutter 21 nach oben gegen einen festen Absatz 36 festgelegt. Im übrigen entspricht diese Ausführungsform der zu den Fig.3 und 4 beschriebenen Ausführungsform.An alternative solution to the arrangement of the threaded spindle 19 with a threaded nut 21 is shown in FIG. 2. Here, in the first part 23a inserted into the upper support frame 5a from below, the threaded nut 21 is fixed upward against a fixed shoulder 36. Otherwise, this embodiment corresponds to the embodiment described for FIGS. 3 and 4.

Claims (7)

1. A continuous metal casting device, particularly for cast steel strands, with a guide frame following the continuous casting mould in the casting direction, which frame consists of individual segments, each segment having one upper and one lower support frame, several support roller being mounted on each support frame so as to pivot and at least individual support rollers being driven and opposing support frames being adjustable to a support roller distance corresponding to the thickness of the cast strand by means of hydraulic main displacement drives, provided in pairs and connecting lower and upper frames, which can be doubly acted on, to which secondary adjustment drives with the ability to be adjusted mechanically for fine adjustment are allocated, the thickness distance being able to be fixed by means of stops arranged on the guide frame, characterised in that the contact force on the stops (11) can be regulated on the one hand by the hydraulic main displacement drive (9), and on the other hand by the secondary adjustment drive (10) mounted on one of the support frames (5a, 5b), the support means (17) of which rest against the stops (11) in all thickness adjustments and with the support means (17) of which the thickness distance (8) can be finely adjusted in both positioning directions (18a and 18b).
2. A continuous metal casting device according to Claim 1, characterised in that the secondary adjustment drive (10) has as support means (17) a threaded spindle (19) capable of being driven, that the threaded spindle (19) is held in a threaded nut (21) and in a bushing (22), that the bushing (22) in the region of the stop (11) is fitted in a bushing housing (23) attached inside the upper support frame (5a) and that the threaded nut (21) is also held in the bushing housing (23).
3. A continuous metal casting device according to Claims 1 and 2, characterised in that two pairs (26) of the secondary adjustment drive (10) are arranged symmetrically on the upper support frame (5a) of one segment (3) and are operable synchronously by means of a common drive (27).
4. A continuous metal casting device according to Claims 1 to 3, characterised in that a drive motor (27a) or a succeeding transmission gear (28) can be driven by means of cardan shafts (29, 30) and two secondary adjustment drives (10) each by means of a connecting shaft (31, 32) running parallel to the support rollers (4).
5. A continuous metal casting device according to Claims 1 to 4, characterised in that the connecting shafts (31, 32) each drive a worm gear (33), the worm wheel (34) being attached to the threaded spindle (19) and the worm (35) to the connecting shaft (31 or 32).
6. A continuous metal casting device according to Claims 1 to 5, characterised in that the bushing housing (23) inserted in the upper support frame (5a) is designed in two parts and a first part (23a) can be inserted and attached to the upper support frame (5a) from below and a second part (23b) from above.
7. A continuous metal casting device according to Claims 1 to 6, characterised in that in the first. part (23a) introduced from below of the two-part bushing housing (23) the threaded nut (21) rests on top against a fixed step (36).
EP86103274A 1985-03-12 1986-03-11 Apparatus for the continuous casting of metals, expecially steel Expired EP0194656B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103274T ATE38000T1 (en) 1985-03-12 1986-03-11 METAL CONTINUOUS CASTING DEVICE, IN PARTICULAR FOR STEEL CASTING STRIPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853508658 DE3508658A1 (en) 1985-03-12 1985-03-12 METAL CONTINUOUS CASTING DEVICE, ESPECIALLY FOR STEEL CAST STRAPS
DE3508658 1985-03-12

Publications (2)

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EP0194656A1 EP0194656A1 (en) 1986-09-17
EP0194656B1 true EP0194656B1 (en) 1988-10-19

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EP (1) EP0194656B1 (en)
JP (1) JPS61216844A (en)
AT (1) ATE38000T1 (en)
DE (1) DE3508658A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115857A (en) * 1990-07-18 1992-05-26 Voest-Alpine Industrieanlagenbau G.M.B.H. Strand guide arrangement provided at a continuous casting plant
DE4138740A1 (en) * 1991-11-26 1993-05-27 Schloemann Siemag Ag METHOD AND DEVICE FOR CONTINUOUSLY casting slabs or blocks
DE4306853C2 (en) * 1993-02-26 1996-03-21 Mannesmann Ag Strand guide frame
DE19928196A1 (en) * 1999-06-19 2000-12-21 Sms Demag Ag Device for setting guide segments of a continuous casting or casting-rolling system
CN114871980B (en) * 2022-05-31 2024-04-05 桂德(武汉)科工有限公司 Clamping device and assembling method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458240C3 (en) * 1963-12-20 1974-10-24 United States Steel Corp., Pittsburgh, Pa. (V.St.A.) A strand transport device downstream of a continuous casting mold
ES331665A1 (en) * 1965-10-12 1967-11-16 Gosudarstveny Cojuzny Inst Projektirovanya Met Allourgitc Guide mechanism in the secondary cooling zone of a continuous metal cold machine. (Machine-translation by Google Translate, not legally binding)
CH515760A (en) * 1969-05-13 1971-11-30 Concast Ag Device for guiding a strand in the secondary cooling zone during continuous casting in arch systems
DE1963146C3 (en) * 1969-12-17 1974-02-28 Demag Ag, 4100 Duisburg Segment frame for the support or transport rollers of a metal, in particular steel, continuous casting plant
DE2133144B2 (en) * 1971-07-03 1973-09-27 Concast Ag, Zuerich (Schweiz) Method and device for conveying and straightening a strand in a continuous casting plant
JPS5192728A (en) * 1975-02-14 1976-08-14 RENZOKUCHUZOSETSUBINI OKERU CHUHENANNAISOCHI
DE3106531A1 (en) * 1981-02-21 1982-09-09 SMS Schloemann-Siemag AG, 4000 Düsseldorf DRIVING AND LEVELING MACHINE FOR CONTINUOUS CASTING PLANTS
AT371033B (en) * 1981-09-03 1983-05-25 Voest Alpine Ag CONTINUOUS FRAME FOR A CONTINUOUS CASTING SYSTEM
JPH05231696A (en) * 1992-02-19 1993-09-07 Nec Corp Air conditioning system

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DE3508658C2 (en) 1988-04-14
DE3508658A1 (en) 1986-09-25
EP0194656A1 (en) 1986-09-17
ATE38000T1 (en) 1988-11-15
JPS61216844A (en) 1986-09-26

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