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EP0499562A1 - Hoop for continuous casting roll - Google Patents

Hoop for continuous casting roll Download PDF

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Publication number
EP0499562A1
EP0499562A1 EP92470004A EP92470004A EP0499562A1 EP 0499562 A1 EP0499562 A1 EP 0499562A1 EP 92470004 A EP92470004 A EP 92470004A EP 92470004 A EP92470004 A EP 92470004A EP 0499562 A1 EP0499562 A1 EP 0499562A1
Authority
EP
European Patent Office
Prior art keywords
rod
bores
bore
ferrule
ferrule according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92470004A
Other languages
German (de)
French (fr)
Other versions
EP0499562B1 (en
Inventor
Jacques Barbe
Gérard Raisson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thyssen Stahl AG
USINOR SA
Original Assignee
Thyssen Edelstahlwerke AG
Thyssen Stahl AG
USINOR Sacilor SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thyssen Edelstahlwerke AG, Thyssen Stahl AG, USINOR Sacilor SA filed Critical Thyssen Edelstahlwerke AG
Publication of EP0499562A1 publication Critical patent/EP0499562A1/en
Application granted granted Critical
Publication of EP0499562B1 publication Critical patent/EP0499562B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel

Definitions

  • the present invention is in the field of continuous casting of metals on one or between two cylinders driven in rotation and the wall of which is vigorously cooled by internal circulation of a cooling fluid. It relates more particularly to the shell of such a cylinder which constitutes said wall.
  • Such cylinders consist of a core ensuring the mechanical resistance of the cylinder and its rotation drive, and of a ferrule surrounding this core, made of a material of high thermal conductivity, in contact with which the cast metal is brought to solidify during the casting operation.
  • a cooling fluid circulates under pressure in channels drilled in the thickness thereof, parallel to the axis of the cylinder. These channels are connected at their ends to supply and return conduits formed for example in the heart of the cylinder.
  • the section of the cooling channels and their distribution in the shell are determined so as to ensure a sufficient flow rate to guarantee the desired heat extraction and the greatest possible homogeneity of the cooling over the entire periphery of the cylinder.
  • These channels are therefore generally in large number and of relatively small diameter (for example 15 mm). It follows that the realization of these channels is very delicate, especially since their length can be important if the shell is wide. An increase in the diameter of these channels could facilitate the drilling of these channels but leads to a strong increase in the flow of coolant to maintain conditions of circulation of said equivalent fluid, without correspondingly increasing the fluid-shell heat exchanges, these essentially depending on the exchange surface, which is proportional to the diameter of the channels whereas, at constant circulation speed, the flow is substantially proportional to the square of this diameter.
  • the object of the present invention is to solve these problems and in particular to allow easier production of the cooling channels. It also aims to increase the overall cooling efficiency, by improving the heat exchange conditions between the shell and the cooling fluid.
  • the invention relates to a cylindrical shell of a casting cylinder for a continuous casting installation on one or between two such cylinders, having bores forming cooling channels drilled parallel to the axis of said ferrule in the thickness of the latter, characterized in that it comprises inside said bores rods extending over substantially the entire length of said bores, of constant section and less than that of said bores.
  • the ferrule comprises, for each cooling channel, between the surface of the bore and said rod, spacers for holding said rod in a position remote from the surface of the bore which is the closer to the outer surface of the ferrule.
  • said rods are off-center with respect to said bores towards the axis of the ferrule.
  • This arrangement favors the passage of the coolant in the zone of the bore which is closest to the surface of the shell, and which is the zone essentially receiving the heat flux coming from the cast product and transmitted by conduction in the shell. .
  • the ends of the bores are closed by plugs connected to the ends of the rods and comprising elastic sealing means for sealing the ends of the bores.
  • Such known means consist, for example, of welding or screwing metal plugs at the ends of the bores.
  • stresses due to welding appear in the shell and may cause cracking.
  • any subsequent repair operations require machining of the welded areas in order to access the cooling channels.
  • screw caps the ends of the bores must be tapped, and moreover cracks may also appear at the bottom of the thread in the shell.
  • the sealing means according to this latter arrangement of the invention eliminate these problems and disadvantages by reducing machining to a single bore, and eliminating any crack initiation.
  • the casting cylinder according to the prior art represented in FIG. 1 comprises a ferrule 1 made of material of high thermal conductivity surrounding a core 2 composed of a support piece 3 and two flanges 4 which rigidly hold the ferrule by tightening by means tie rods 5.
  • Cooling channels 6 are drilled in the shell parallel to the cylinder axis and closed at each end by plugs 7. These channels 6 are connected to supply and return ducts 8 for the fluid cooling.
  • the cooling channels have for example a diameter of 15 mm, and the plugs 7 are welded to the ferrule.
  • the drawing of Figure 2 shows, on an enlarged scale, the detail, corresponding to the area A of Figure 1, of the ferrule according to the present invention.
  • the cooling channel 6 is formed by a bore 11 made in the shell, for example 20 mm in diameter, in which is placed a rod 12 of smaller diameter, for example 13 mm, extending over the entire length of the bore.
  • the rod 12 is offset from the bore towards the axis of the cylinder and maintained in contact with the wall zone 13 of the bore located towards said axis by means of spacers 14 interposed between the rod and the bore on the side diametrically opposite to the contact zone 13.
  • the space thus formed between the wall of the bore and the rod constitutes the channel in which the cooling fluid circulates.
  • spacers 14 are thus distributed over the length of the bore to guarantee constant positioning of the rod therein.
  • the spacers are thin, and have a section of elongated shape in the direction of the flow and thinned towards the ends 14 ′, as shown in FIG. 4.
  • the shape and the arrangement of the spacers 14 can be different.
  • the spacer 14 located in a radial plane of the cylinder can be replaced for example by two spacers of similar shape, located symmetrically on either side of this plane.
  • the cross section of the rod 12 can also be modified.
  • this rod 12a can be cylindrical with a diameter substantially equal to that of the bore 11, and include a flat 12b, or any other machining carried out so that when this rod is placed in the bore, a channel 6a remains between the rod and the bore, delimited by this flat or machining and the surface of the bore.
  • the rod is then preferably positioned angularly in the bore so that this flat or machining is directed towards the outer surface of the ferrule.
  • the rod 12 Towards its end, and at the level of the outlet in the bore 11 of the conduits 8, 9 for supplying or returning the cooling fluid, the rod 12 comprises a part 15 offset from its median part but centered with respect to the bore, so as not to disturb the flow of the fluid.
  • a plug 16 is inserted in the bore and connected only to the end 18 of the rod 12.
  • the plug 16 has an annular seal 17 made of elastic material inserted between the end 18 of the rod 12 and the bore 11.
  • the seal 17 is in axial abutment against a flange 19 of the rod.
  • the plug has axial retaining means comprising a cap 21, provided with anchoring elements constituted by deformable tongues 22 notched, the notches 23 of which are anchored on frustoconical shoulders 24 provided for this purpose on the end 18 of the stem.
  • the set of tongues 22 has a frustoconical external shape and is inserted between the end 18 of the rod and the seal 17 which, due to its elasticity, exerts radial pressure on the tongues 22, thus ensuring the anchoring of the notches 23 of the cap on the frustoconical shoulders 24.
  • the seal being thus compressed between the abutment flange 19, the cap 21 and its tongues 22, and the wall of the bore 11, seals the ends of the cooling channels.
  • the seal has at its periphery an annular groove 20 which constitutes a free volume capable of absorbing any variations in volume or deformation of the seal, and thus preventing the latter from creeping between the bore and the cap 21.
  • the cap also includes two diametrically opposite ears 25 which engage in clearances 26 of corresponding shapes made in the shell, and immobilizing the cap in rotation relative to the shell. Due to the assembly of the cap, clamped on the end 18 of the rod by the seal 17, the rod 12 is itself immobilized in rotation.
  • the ears 25 constitute a stop opposing any significant axial displacement of the rod and the plug relative to the ferrule, a slight clearance, in the axial direction, being however made between these ears and the clearances 26 to take account possible differences in expansion between the rod and the ferrule.
  • the implementation of the plug according to the invention does not require any machining of the shell other than drilling the bore, which therefore has a wall of constant diameter over its entire length, thus providing a smooth surface. unlikely to constitute crack initiators.
  • the plugs have no direct rigid mechanical connection with the ferrule, and are maintained, in the axial direction, by the mere fact of their anchoring on the ends of the rods. It is therefore only the rod which maintains the plugs. Furthermore, conversely, the axial position of the rod is maintained only by the plugs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Continuous Casting (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Paper (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Cylindrical hoop 1 for a casting roll for an installation for continuous casting over one or between two such rolls, comprising bores 11 forming cooling channels drilled parallel to the axis of the said hoop in the thickness of the latter, and comprising inside the said bores rods 12 extending over substantially the entire length of the said bores, said rods having a cross-section which is smaller than that of the said bores. <IMAGE>

Description

La présente invention est du domaine de la coulée continue des métaux sur un ou entre deux cylindres entraînés en rotation et dont la paroi est énergiquement refroidie par circulation interne d'un fluide de refroidissement. Elle concerne plus particulièrement la virole d'un tel cylindre qui constitue ladite paroi.The present invention is in the field of continuous casting of metals on one or between two cylinders driven in rotation and the wall of which is vigorously cooled by internal circulation of a cooling fluid. It relates more particularly to the shell of such a cylinder which constitutes said wall.

On connaît des tels cylindres constitués d'un coeur assurant la résistance mécanique du cylindre et son entraînement en rotation, et d'une virole entourant ce coeur, réalisée en un matériau de conductibilité thermique élevée, au contact de laquelle le métal coulé est amené à se solidifier lors de l'opération de coulée. Pour assurer le refroidissement énergique de cette virole, un fluide de refroidissement circule sous pression dans des canaux forés dans l'épaisseur de celle-ci, parallèlement à l'axe du cylindre. Ces canaux sont reliés à leurs extrémités à des conduits d'alimentation et de retour ménagés par exemple dans le coeur du cylindre. La section des canaux de refroidissement et leur répartition dans la virole sont déterminés de manière à assurer un débit suffisant pour garantir l'extraction de chaleur souhaitée et une homogénéité la plus grande possible du refroidissement sur tout le pourtour du cylindre. Ces canaux sont donc généralement en grand nombre et de diamètre relativement faible (par exemple 15 mm). Il s'ensuit que la réalisation de ces canaux est très délicate, d'autant plus que leur longueur peut être importante si la virole est large. Une augmentation du diamètre de ces canaux pourrait faciliter le perçage de ces canaux mais conduit à accroître fortement le débit de fluide de refroidissement pour maintenir des conditions de circulation dudit fluide équivalentes, sans pour autant accroître de manière correspondante les échanges thermiques fluide-virole, ceux-ci dépendant essentiellement de la surface d'échange, qui est proportionnelle au diamètre des canaux alors que, à vitesse de circulation constante, le débit est sensiblement proportionnel au carré de ce diamètre.Such cylinders are known which consist of a core ensuring the mechanical resistance of the cylinder and its rotation drive, and of a ferrule surrounding this core, made of a material of high thermal conductivity, in contact with which the cast metal is brought to solidify during the casting operation. To ensure the energetic cooling of this ferrule, a cooling fluid circulates under pressure in channels drilled in the thickness thereof, parallel to the axis of the cylinder. These channels are connected at their ends to supply and return conduits formed for example in the heart of the cylinder. The section of the cooling channels and their distribution in the shell are determined so as to ensure a sufficient flow rate to guarantee the desired heat extraction and the greatest possible homogeneity of the cooling over the entire periphery of the cylinder. These channels are therefore generally in large number and of relatively small diameter (for example 15 mm). It follows that the realization of these channels is very delicate, especially since their length can be important if the shell is wide. An increase in the diameter of these channels could facilitate the drilling of these channels but leads to a strong increase in the flow of coolant to maintain conditions of circulation of said equivalent fluid, without correspondingly increasing the fluid-shell heat exchanges, these essentially depending on the exchange surface, which is proportional to the diameter of the channels whereas, at constant circulation speed, the flow is substantially proportional to the square of this diameter.

La présente invention a pour but de résoudre ces problèmes et notamment de permettre une réalisation plus aisée des canaux de refroidissement. Elle a aussi pour but d'accroître le rendement global du refroidissement, en améliorant les conditions d'échange thermique entre la virole et le fluide de refroidissement.The object of the present invention is to solve these problems and in particular to allow easier production of the cooling channels. It also aims to increase the overall cooling efficiency, by improving the heat exchange conditions between the shell and the cooling fluid.

Avec ces objectifs en vue, l'invention a pour objet une virole cylindrique d'un cylindre de coulée pour une installation de coulée continue sur un ou entre deux tels cylindres, comportant des alésages formant des canaux de refroidissement forés parallèlement à l'axe de ladite virole dans l'épaisseur de cette dernière, caractérisée en ce qu'elle comporte à l'intérieur desdits alésages des tiges s'étendant sur sensiblement toute la longueur desdits alésages, de section constante et inférieure à celle desdits alésages.With these objectives in view, the invention relates to a cylindrical shell of a casting cylinder for a continuous casting installation on one or between two such cylinders, having bores forming cooling channels drilled parallel to the axis of said ferrule in the thickness of the latter, characterized in that it comprises inside said bores rods extending over substantially the entire length of said bores, of constant section and less than that of said bores.

Comme on l'aura sans doute déjà compris, on peut grâce à l'invention, augmenter le diamètre des alésages, ce qui en facilite la réalisation par perçage et accroît la surface d'échange thermique entre la virole et le fluide de refroidissement, sans que cela conduise nécessairement à augmenter la section de passage de ce fluide, ce qui permet de conserver, ou d'adapter si cela est souhaité, les conditions d'écoulement telles que vitesse et débit.As will no doubt already be understood, it is possible, thanks to the invention, to increase the diameter of the bores, which facilitates the production thereof by drilling and increases the surface area for heat exchange between the shell and the cooling fluid, without that this necessarily leads to an increase in the cross section of this fluid, which makes it possible to conserve, or to adapt if desired, the flow conditions such as speed and flow.

Selon une disposition particulière de l'invention, la virole comporte, pour chaque canal de refroidissement, entre la surface de l'alésage et ladite tige, des entretoises de maintien de ladite tige en position éloignée de la surface de l'alésage qui est la plus proche de la surface externe de la virole.According to a particular arrangement of the invention, the ferrule comprises, for each cooling channel, between the surface of the bore and said rod, spacers for holding said rod in a position remote from the surface of the bore which is the closer to the outer surface of the ferrule.

Selon une autre disposition, lesdites tiges sont décentrées par rapport auxdits alésages vers l'axe de la virole. Cette disposition favorise le passage du fluide de refroidissement dans la zone de l'alésage qui se trouve le plus proche de la surface de la virole, et qui est la zone recevant essentiellement le flux thermique provenant du produit coulé et transmis par conduction dans la virole.According to another arrangement, said rods are off-center with respect to said bores towards the axis of the ferrule. This arrangement favors the passage of the coolant in the zone of the bore which is closest to the surface of the shell, and which is the zone essentially receiving the heat flux coming from the cast product and transmitted by conduction in the shell. .

Selon une autre disposition encore, les extrémités des alésages sont obturés par des bouchons liés aux extrémités des tiges et comportant des moyens d'étanchéité élastiques pour assurer l'étanchéité des extrémités des alésages. Cette dernière disposition permet notamment de supprimer certains inconvénients des moyens connus d'obturation des extrémités des alésages. De tels moyens connus consistent par exemple à souder ou à visser des bouchons métalliques aux extrémités des alésages. Dans le cas de bouchons soudés, des contraintes dues à la soudure apparaissent dans la virole et risquent d'entraîner des fissurations. De plus d'éventuelles opérations ultérieures de réparation nécessitent, pour accéder aux canaux de refroidissement, l'usinage des zones soudées. Dans le cas de bouchons vissés, il faut tarauder les extrémités des alésages, et de plus des fissures peuvent aussi apparaître à fond de filet dans la virole.According to yet another arrangement, the ends of the bores are closed by plugs connected to the ends of the rods and comprising elastic sealing means for sealing the ends of the bores. This latter arrangement makes it possible in particular to eliminate certain drawbacks of the known means for closing the ends of the bores. Such known means consist, for example, of welding or screwing metal plugs at the ends of the bores. In the case of welded plugs, stresses due to welding appear in the shell and may cause cracking. In addition, any subsequent repair operations require machining of the welded areas in order to access the cooling channels. In the case of screw caps, the ends of the bores must be tapped, and moreover cracks may also appear at the bottom of the thread in the shell.

Les moyens d'obturation selon cette dernière disposition de l'invention suppriment ces problèmes et inconvénients en réduisant les usinages au seul alésage, et en supprimant toute amorce de fissuration.The sealing means according to this latter arrangement of the invention eliminate these problems and disadvantages by reducing machining to a single bore, and eliminating any crack initiation.

Selon d'autres caractéristiques additionnelles :

  • les moyens d'étanchéité comprennent un anneau en matériau élastique interposé entre l'alésage et l'extrémité de la tige et entourant celle-ci, et des moyens de retenue axiale dudit anneau par rapport à la tige ;
  • les moyens de retenue axiale comprennent des éléments déformables d'ancrage sur l'extrémité de la tige ;
  • le maintien des éléments d'ancrage sur la tige est assuré par une compression radiale exercée sur ceux-ci par l'anneau élastique ;
  • les bouchons comportent des moyens d'immobilisation en rotation de la tige par rapport à l'alésage ;
  • les bouchons comportent des moyens de butée axiale par rapport à la virole.
According to other additional characteristics:
  • the sealing means comprise a ring made of elastic material interposed between the bore and the end of the rod and surrounding the latter, and means for axially retaining said ring relative to the rod;
  • the axial retaining means comprise deformable anchoring elements on the end of the rod;
  • maintaining the anchoring elements on the rod is ensured by a radial compression exerted on them by the elastic ring;
  • the plugs comprise means for immobilizing the rod in rotation relative to the bore;
  • the plugs comprise means of axial stop relative to the ferrule.

On notera que les avantages évoqués précédemment résultent de la mise en oeuvre combinée du bouchon et des tiges, qui, outre leur fonction dans la réalisation des canaux de refroidissement, assurent la liaison et le maintien en position des bouchons situés aux deux extrémités d'un même alésage.It will be noted that the advantages mentioned above result from the combined implementation of the plug and the rods, which, in addition to their function in the production of the cooling channels, ensure the connection and the holding in position of the plugs located at the two ends of a same bore.

D'autres caractéristiques et avantages de l'invention apparaîtront dans la description qui va être faite à titre d'exemple d'une virole d'un cylindre de coulée conforme à l'invention.Other characteristics and advantages of the invention will appear in the description which will be given by way of example of a shell of a casting cylinder according to the invention.

On se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une vue en demi-coupe d'un cylindre de coulée selon l'art antérieur ;
  • la figure 2 est une vue de détail de la zone A repérée sur la figure 1, d'une virole de cylindre conforme à l'invention ;
  • la figure 3 est une vue en coupe selon la ligne III-III de la figure 2 .
  • la figure 4 est une section selon la ligne IV-IV de la figure 3 ;
  • la figure 5 est une section selon la ligne V-V de la figure 2 ;
  • la figure 6 est une vue en coupe, correspondant à celle de la figure 3, dans le cas d'une variante de réalisation de la tige.
Reference is made to the appended drawings in which:
  • Figure 1 is a half-sectional view of a casting cylinder according to the prior art;
  • Figure 2 is a detail view of the area A marked in Figure 1, of a cylinder shell according to the invention;
  • Figure 3 is a sectional view along line III-III of Figure 2.
  • Figure 4 is a section along the line IV-IV of Figure 3;
  • Figure 5 is a section along line VV of Figure 2;
  • Figure 6 is a sectional view, corresponding to that of Figure 3, in the case of an alternative embodiment of the rod.

Le cylindre de coulée selon l'art antérieur représenté à la figure 1 comporte une virole 1 en matériau de conductibilité thermique élevée entourant un coeur 2 composé d'une pièce de support 3 et de deux brides 4 qui maintiennent rigidement la virole par serrage au moyen de tirants 5. Des canaux de refroidissement 6 sont forés dans la virole parallèlement à l'axe du cylindre et obturés à chaque extrémité par des bouchons 7. Ces canaux 6 sont reliés à des conduits d'alimentation 8 et de retour 9 pour le fluide de refroidissement. Dans les viroles de ce type les canaux de refroidissement ont par exemple un diamètre de 15 mm, et les bouchons 7 sont soudés sur la virole.The casting cylinder according to the prior art represented in FIG. 1 comprises a ferrule 1 made of material of high thermal conductivity surrounding a core 2 composed of a support piece 3 and two flanges 4 which rigidly hold the ferrule by tightening by means tie rods 5. Cooling channels 6 are drilled in the shell parallel to the cylinder axis and closed at each end by plugs 7. These channels 6 are connected to supply and return ducts 8 for the fluid cooling. In the ferrules of this type the cooling channels have for example a diameter of 15 mm, and the plugs 7 are welded to the ferrule.

Le dessin de la figure 2 montre, à échelle agrandie, le détail, correspondant à la zone A de la figure 1, de la virole conforme à la présente invention. Le canal de refroidissement 6 est formé par un alésage 11 réalisé dans la virole, par exemple de 20 mm de diamètre, dans lequel est placé une tige 12 de plus faible diamètre, par exemple 13 mm, s'étendant sur toute la longueur de l'alésage. La tige 12 est désaxée par rapport à l'alésage vers l'axe du cylindre et maintenue en contact avec la zone de paroi 13 de l'alésage située vers ledit axe au moyen d'entretoises 14 intercalées entre la tige et l'alésage du côté diamétralement opposé à la zone de contact 13. L'espace ainsi ménagé entre la paroi de l'alésage et la tige constitue le canal dans lequel circule le fluide de refroidissement. Plusieurs entretoises 14 sont ainsi réparties sur la longueur de l'alésage pour garantir un positionnement constant de la tige dans celui-ci. Pour limiter la réduction de refroidissement localisée dans la zone de contact des entretoises avec l'alésage, et les perturbations de l'écoulement du fluide qu'elles occasionnent, les entretoises sont de faible épaisseur, et ont une section de forme allongée dans la direction de l'écoulement et amincies vers les extrémités 14′, ainsi que représenté à la figure 4.The drawing of Figure 2 shows, on an enlarged scale, the detail, corresponding to the area A of Figure 1, of the ferrule according to the present invention. The cooling channel 6 is formed by a bore 11 made in the shell, for example 20 mm in diameter, in which is placed a rod 12 of smaller diameter, for example 13 mm, extending over the entire length of the bore. The rod 12 is offset from the bore towards the axis of the cylinder and maintained in contact with the wall zone 13 of the bore located towards said axis by means of spacers 14 interposed between the rod and the bore on the side diametrically opposite to the contact zone 13. The space thus formed between the wall of the bore and the rod constitutes the channel in which the cooling fluid circulates. Several spacers 14 are thus distributed over the length of the bore to guarantee constant positioning of the rod therein. To limit the reduction of cooling localized in the zone of contact of the spacers with the bore, and the disturbances of the flow of the fluid which they cause, the spacers are thin, and have a section of elongated shape in the direction of the flow and thinned towards the ends 14 ′, as shown in FIG. 4.

Bien entendu la forme et la disposition des entretoises 14 peuvent être différentes. En particulier l'entretoise 14 située dans un plan radial du cylindre peut être remplacée par exemple par deux entretoises de forme similaire, situées symétriquement de part et d'autre de ce plan.Of course the shape and the arrangement of the spacers 14 can be different. In particular the spacer 14 located in a radial plane of the cylinder can be replaced for example by two spacers of similar shape, located symmetrically on either side of this plane.

La section de la tige 12 peut aussi être modifiée. Par exemple, ainsi que représenté à la figure 6, cette tige 12a peut être cylindrique de diamètre sensiblement égal à celui de l'alésage 11, et comporter un méplat 12b, ou tout autre usinage réalisé de manière que, lorsque cette tige est placée dans l'alésage, un canal 6a subsiste entre la tige et l'alésage, délimité par ce méplat ou usinage et la surface de l'alésage. La tige est alors préférentiellement positionnée angulairement dans l'alésage de manière que ce méplat ou usinage soit dirigé vers la surface extérieure de la virole. Une telle disposition simplifie le positionnement de la tige dans l'alésage et supprime toute perturbation dans l'écoulement de fluide de refroidissement.The cross section of the rod 12 can also be modified. For example, as shown in FIG. 6, this rod 12a can be cylindrical with a diameter substantially equal to that of the bore 11, and include a flat 12b, or any other machining carried out so that when this rod is placed in the bore, a channel 6a remains between the rod and the bore, delimited by this flat or machining and the surface of the bore. The rod is then preferably positioned angularly in the bore so that this flat or machining is directed towards the outer surface of the ferrule. Such an arrangement simplifies the positioning of the rod in the bore and eliminates any disturbance in the coolant flow.

Vers son extrémité, et au niveau du débouché dans l'alésage 11 des conduits 8, 9 d'alimentation ou de retour du fluide de refroidissement, la tige 12 comporte une partie 15 désaxée par rapport à sa partie médiane mais centrée par rapport à l'alésage, de manière à ne pas perturber l'écoulement du fluide.Towards its end, and at the level of the outlet in the bore 11 of the conduits 8, 9 for supplying or returning the cooling fluid, the rod 12 comprises a part 15 offset from its median part but centered with respect to the bore, so as not to disturb the flow of the fluid.

Pour obturer chaque extrémité des alésages et assurer l'étanchéité du circuit de refroidissement, un bouchon 16 est inséré dans l'alésage et lié uniquement à l'extrémité 18 de la tige 12. A cette fin, le bouchon 16 comporte un joint annulaire 17 en matériau élastique inséré entre l'extrémité 18 de la tige 12 et l'alésage 11. Le joint 17 est en butée axiale contre une collerette 19 de la tige. Par ailleurs le bouchon comporte des moyens de retenue axiale comprenant un chapeau 21, pourvu d'éléments d'ancrage constitués par des languettes déformables 22 crantées dont les crans 23 s'ancrent sur des épaulements tronconiques 24 prévus à cet effet sur l'extrémité 18 de la tige. L'ensemble des languettes 22 a une forme extérieure tronconique et s'insère entre l'extrémité 18 de la tige et le joint 17 qui, du fait de son élasticité, exerce une pression radiale sur les languettes 22, assurant ainsi l'ancrage des crans 23 du chapeau sur les épaulements tronconiques 24. Le joint étant ainsi comprimé entre la collerette de butée 19, le chapeau 21 et ses languettes 22, et la paroi de l'alésage 11, assure l'étanchéité des extrémités des canaux de refroidissement. Par ailleurs, le joint comporte à sa périphérie une gorge annulaire 20 qui constitue un volume libre pouvant absorber les éventuelles variations de volume ou déformation du joint, et évitant ainsi le fluage de ce dernier entre l'alésage et le chapeau 21.To seal each end of the bores and seal the cooling circuit, a plug 16 is inserted in the bore and connected only to the end 18 of the rod 12. To this end, the plug 16 has an annular seal 17 made of elastic material inserted between the end 18 of the rod 12 and the bore 11. The seal 17 is in axial abutment against a flange 19 of the rod. Furthermore, the plug has axial retaining means comprising a cap 21, provided with anchoring elements constituted by deformable tongues 22 notched, the notches 23 of which are anchored on frustoconical shoulders 24 provided for this purpose on the end 18 of the stem. The set of tongues 22 has a frustoconical external shape and is inserted between the end 18 of the rod and the seal 17 which, due to its elasticity, exerts radial pressure on the tongues 22, thus ensuring the anchoring of the notches 23 of the cap on the frustoconical shoulders 24. The seal being thus compressed between the abutment flange 19, the cap 21 and its tongues 22, and the wall of the bore 11, seals the ends of the cooling channels. Furthermore, the seal has at its periphery an annular groove 20 which constitutes a free volume capable of absorbing any variations in volume or deformation of the seal, and thus preventing the latter from creeping between the bore and the cap 21.

Le chapeau comporte aussi deux oreilles 25 diamétralement opposées qui s'engagent dans des dégagements 26 de formes correspondantes réalisées dans la virole, et immobilisant en rotation le chapeau par rapport à la virole. Du fait de l'assemblage du chapeau, serré sur l'extrémité 18 de la tige par le joint 17, la tige 12 est elle même immobilisée en rotation. De plus les oreilles 25 constituent une butée s'opposant à tout déplacement axial important de la tige et du bouchon par rapport à la virole, un léger jeu, dans le sens axial, étant toutefois ménagé entre ces oreilles et les dégagements 26 pour tenir compte des éventuelles différences de dilatation entre la tige et la virole.The cap also includes two diametrically opposite ears 25 which engage in clearances 26 of corresponding shapes made in the shell, and immobilizing the cap in rotation relative to the shell. Due to the assembly of the cap, clamped on the end 18 of the rod by the seal 17, the rod 12 is itself immobilized in rotation. In addition, the ears 25 constitute a stop opposing any significant axial displacement of the rod and the plug relative to the ferrule, a slight clearance, in the axial direction, being however made between these ears and the clearances 26 to take account possible differences in expansion between the rod and the ferrule.

On notera enfin que la mise en oeuvre du bouchon selon l'invention ne nécessite aucun usinage de la virole autre que le forage de l'alésage, qui présente de ce fait une paroi de diamètre constant sur toute sa longueur, offrant ainsi une surface lisse peu susceptible de constituer des amorces de fissures. On notera aussi que les bouchons n'ont aucune liaison mécanique rigide directe avec la virole, et sont maintenus, selon la direction axiale, par le seul fait de leur ancrage sur les extrémités des tiges. C'est donc uniquement la tige qui assure le maintien des bouchons. Par ailleurs, réciproquement, le maintien en position axiale de la tige est assuré uniquement par les bouchons.Finally, it should be noted that the implementation of the plug according to the invention does not require any machining of the shell other than drilling the bore, which therefore has a wall of constant diameter over its entire length, thus providing a smooth surface. unlikely to constitute crack initiators. It will also be noted that the plugs have no direct rigid mechanical connection with the ferrule, and are maintained, in the axial direction, by the mere fact of their anchoring on the ends of the rods. It is therefore only the rod which maintains the plugs. Furthermore, conversely, the axial position of the rod is maintained only by the plugs.

Claims (9)

1) Virole (1) cylindrique d'un cylindre de coulée pour une installation de coulée continue sur un ou entre deux tels cylindres, comportant des alésages (11) formant des canaux de refroidissement forés parallèlement à l'axe de ladite virole dans l'épaisseur de cette dernière, caractérisée en ce qu'elle comporte à l'intérieur desdits alésages des tiges (12) s'étendant sur sensiblement toute la longueur desdits alésages, de section inférieure à celle desdits alésages. 1) cylindrical shell (1) of a casting cylinder for a continuous casting installation on one or between two such cylinders, comprising bores (11) forming cooling channels drilled parallel to the axis of said ferrule in the thickness of the latter, characterized in that it comprises, inside said bores, rods (12) extending over substantially the entire length of said bores, of section smaller than that of said bores. 2) Virole selon la revendication 1, caractérisée en ce que pour chaque canal de refroidissement elle comporte entre la surface de l'alésage et ladite tige des entretoises (14) de maintien de ladite tige en position éloignée de la surface de l'alésage qui est la plus proche de la surface externe de la virole. 2) ferrule according to claim 1, characterized in that for each cooling channel it comprises between the surface of the bore and said rod of the spacers (14) for holding said rod in a position remote from the surface of the bore which is closest to the outer surface of the shell. 3) Virole selon la revendication 1 caractérisée en ce que lesdites tiges sont décentrées par rapport auxdits alésages vers l'axe de la virole, de manière à ménager, entre tige et alésage, un canal (6,6a), situé vers la surface externe de la virole. 3) ferrule according to claim 1 characterized in that said rods are offset relative to said bores towards the axis of the ferrule, so as to provide, between rod and bore, a channel (6,6a), located towards the external surface of the shell. 4) Virole selon la revendication 1, caractérisée en ce que les extrémités des alésages sont obturés par des bouchons (16) liés aux extrémités (18) des tiges et comportant des moyens d'étanchéité élastiques pour assurer l'étanchéité des extrémités des alésages. 4) Ferrule according to claim 1, characterized in that the ends of the bores are closed by plugs (16) connected to the ends (18) of the rods and comprising elastic sealing means for sealing the ends of the bores. 5) Virole selon la revendication 4, caractérisée en ce que les moyens d'étanchéité comprennent un anneau (17) en matériau élastique interposé entre l'alésage et l'extrémité (18) de la tige et entourant celle-ci, et des moyens (21) de retenue axiale dudit anneau par rapport à la tige. 5) ferrule according to claim 4, characterized in that the sealing means comprise a ring (17) of elastic material interposed between the bore and the end (18) of the rod and surrounding the latter, and means (21) of axial retention of said ring relative to the rod. 6) Virole selon la revendication 6, caractérisée en ce que les moyens de retenue axiale comprennent des élements déformables (22) d'ancrage sur l'extrémité de la tige. 6) ferrule according to claim 6, characterized in that the axial retaining means comprise deformable elements (22) for anchoring on the end of the rod. 7) Virole selon la revendication 6, caractérisée en ce que le maintien des éléments d'ancrage (22) sur la tige est assuré par une compression radiale exercée sur ceux-ci par l'anneau élastique. 7) Ferrule according to claim 6, characterized in that the retention of the anchoring elements (22) on the rod is ensured by a radial compression exerted on them by the elastic ring. 8) Virole selon la revendication 4, caractérisée en ce que les bouchons comportent des moyens (25) d'immobilisation en rotation de la tige par rapport à l'alésage. 8) ferrule according to claim 4, characterized in that the plugs comprise means (25) for immobilizing the rod in rotation relative to the bore. 9) Virole selon la revendication 4, caractérisée en ce que les bouchons comportent des moyens (25) de butée axiale par rapport à la virole. 9) ferrule according to claim 4, characterized in that the plugs comprise means (25) for axial abutment relative to the ferrule.
EP92470004A 1991-02-13 1992-02-04 Hoop for continuous casting roll Expired - Lifetime EP0499562B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101865 1991-02-13
FR9101865A FR2672523B1 (en) 1991-02-13 1991-02-13 CONTINUOUS CASTING CYLINDER FUEL.

Publications (2)

Publication Number Publication Date
EP0499562A1 true EP0499562A1 (en) 1992-08-19
EP0499562B1 EP0499562B1 (en) 1998-05-27

Family

ID=9409791

Family Applications (1)

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EP92470004A Expired - Lifetime EP0499562B1 (en) 1991-02-13 1992-02-04 Hoop for continuous casting roll

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EP (1) EP0499562B1 (en)
AT (1) ATE166603T1 (en)
DE (2) DE69225626T2 (en)
DK (1) DK0499562T3 (en)
ES (1) ES2118122T3 (en)
FI (1) FI97607C (en)
FR (1) FR2672523B1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0680796A1 (en) * 1994-05-02 1995-11-08 Siemens Aktiengesellschaft Roll for a continuous casting installation
EP0792706A1 (en) * 1996-02-29 1997-09-03 USINOR SACILOR Société Anonyme Casting cylinder of continuous casting apparatus with one or two cylinders
EP0913218A1 (en) * 1997-10-31 1999-05-06 Usinor Method and installation for casting thin strips on one roll or between two rolls
WO2002026425A1 (en) * 2000-09-27 2002-04-04 Sms Demag Aktiengesellschaft Casting roll for creating cast bars, especially for a twin-roll casting machine
WO2007056801A1 (en) 2005-11-16 2007-05-24 Ihi Corporation Twin roll caster, and equipment and method for operating the same
US7594535B2 (en) 2005-07-25 2009-09-29 Castrip, Llc Twin roll caster, and equipment and method for operating the same
EP2127779A1 (en) * 2007-02-26 2009-12-02 IHI Corporation Casting roll

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408199B (en) 1999-09-06 2001-09-25 Voest Alpine Ind Anlagen CASTING ROLLER

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382608A (en) * 1920-02-18 1921-06-21 Pennsylvania Wire Glass Compan Machinery for rolling glass
US1813142A (en) * 1927-06-30 1931-07-07 Saint Gobain Glass forming roll
US2015747A (en) * 1932-07-11 1935-10-01 Libbey Owens Ford Glass Co Roll construction
FR1468066A (en) * 1965-05-13 1967-02-03 Roller for sheet glass making machines
FR2211296A1 (en) * 1972-12-20 1974-07-19 Procter & Gamble
DE3012736B1 (en) * 1980-03-28 1981-06-04 Mannesmann AG, 4000 Düsseldorf Continuous casting roll

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1382608A (en) * 1920-02-18 1921-06-21 Pennsylvania Wire Glass Compan Machinery for rolling glass
US1813142A (en) * 1927-06-30 1931-07-07 Saint Gobain Glass forming roll
US2015747A (en) * 1932-07-11 1935-10-01 Libbey Owens Ford Glass Co Roll construction
FR1468066A (en) * 1965-05-13 1967-02-03 Roller for sheet glass making machines
FR2211296A1 (en) * 1972-12-20 1974-07-19 Procter & Gamble
DE3012736B1 (en) * 1980-03-28 1981-06-04 Mannesmann AG, 4000 Düsseldorf Continuous casting roll

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0680796A1 (en) * 1994-05-02 1995-11-08 Siemens Aktiengesellschaft Roll for a continuous casting installation
CN1064570C (en) * 1996-02-29 2001-04-18 尤辛诺公司 Casting roll for plant for continuous casting onto one or between two rolls
FR2745510A1 (en) * 1996-02-29 1997-09-05 Usinor Sacilor CASTING CYLINDER OF A CONTINUOUS CASTING PLANT ON ONE OR BETWEEN TWO CYLINDERS
US5839501A (en) * 1996-02-29 1998-11-24 Unicor-Sacilor Casting roll for a plant for continuous casting onto one or between two rolls
EP0792706A1 (en) * 1996-02-29 1997-09-03 USINOR SACILOR Société Anonyme Casting cylinder of continuous casting apparatus with one or two cylinders
EP0913218A1 (en) * 1997-10-31 1999-05-06 Usinor Method and installation for casting thin strips on one roll or between two rolls
FR2770427A1 (en) * 1997-10-31 1999-05-07 Usinor METHOD AND INSTALLATION FOR CASTING METAL THIN STRIP ON OR BETWEEN TWO CYLINDERS
WO2002026425A1 (en) * 2000-09-27 2002-04-04 Sms Demag Aktiengesellschaft Casting roll for creating cast bars, especially for a twin-roll casting machine
US7594535B2 (en) 2005-07-25 2009-09-29 Castrip, Llc Twin roll caster, and equipment and method for operating the same
WO2007056801A1 (en) 2005-11-16 2007-05-24 Ihi Corporation Twin roll caster, and equipment and method for operating the same
EP1948375A1 (en) * 2005-11-16 2008-07-30 Castrip, LLC Twin roll caster, and equipment and method for operating the same
EP1948375A4 (en) * 2005-11-16 2010-02-24 Castrip Llc Twin roll caster, and equipment and method for operating the same
EP2127779A1 (en) * 2007-02-26 2009-12-02 IHI Corporation Casting roll
EP2127779A4 (en) * 2007-02-26 2012-01-04 Ihi Corp Casting roll

Also Published As

Publication number Publication date
FI920607A0 (en) 1992-02-13
FR2672523B1 (en) 1995-04-21
ES2118122T3 (en) 1998-09-16
ATE166603T1 (en) 1998-06-15
FR2672523A1 (en) 1992-08-14
FI97607B (en) 1996-10-15
FI97607C (en) 1997-01-27
FI920607A (en) 1992-08-14
EP0499562B1 (en) 1998-05-27
DE69225626D1 (en) 1998-07-02
DK0499562T3 (en) 1999-03-22
DE4203964A1 (en) 1992-08-20
DE69225626T2 (en) 1999-01-28

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