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EP0130887A1 - Supporting device for a cast product emerging from a continuous-casting mouldand method for adjusting the device - Google Patents

Supporting device for a cast product emerging from a continuous-casting mouldand method for adjusting the device Download PDF

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Publication number
EP0130887A1
EP0130887A1 EP84401293A EP84401293A EP0130887A1 EP 0130887 A1 EP0130887 A1 EP 0130887A1 EP 84401293 A EP84401293 A EP 84401293A EP 84401293 A EP84401293 A EP 84401293A EP 0130887 A1 EP0130887 A1 EP 0130887A1
Authority
EP
European Patent Office
Prior art keywords
product
supporting
sides
ingot mould
plates
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
EP84401293A
Other languages
German (de)
French (fr)
Other versions
EP0130887B1 (en
Inventor
Raymond Vial
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.)
Clecim SAS
Original Assignee
Clecim SAS
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Filing date
Publication date
Application filed by Clecim SAS filed Critical Clecim SAS
Priority to AT84401293T priority Critical patent/ATE39863T1/en
Publication of EP0130887A1 publication Critical patent/EP0130887A1/en
Application granted granted Critical
Publication of EP0130887B1 publication Critical patent/EP0130887B1/en
Expired 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
    • B22D11/1243—Accessories for subsequent treating or working cast stock in situ for cooling by using cooling grids or cooling plates
    • 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 present invention relates to a device for supporting the short sides of a product cast at the outlet of an ingot mold equipping a continuous steel casting machine.
  • a continuous casting machine In a machine continuously casting a product of rectangular section, one generally has to support, in addition to the long sides, also the short sides of the cast product, at least in the zone close to the outlet of the mold, where the solidified part offers the less resistance to thrust due to ferrostatic pressure. Furthermore, a continuous casting machine must generally be able to pour products of different widths, so that it is necessary to provide thereon means making it possible to adjust the position of the support devices on the short sides.
  • the device according to the present invention does not have the drawbacks of these known devices. It in fact always ensures good contact with the cast product, and it makes it possible to refrain from using complex synchronization means, as was the case until now, in the case where the mold is adjustable in operation. It is characterized in that it is provided with means that can be adjusted remotely making it possible to permanently apply the support members on the short sides against the cast product with sufficient force to balance the lateral repelling force due to the ferrostatic pressure.
  • the invention is based on the remark that the lateral pressure exerted at a point by the still liquid steel depends only on the height of the liquid column at this point, and therefore does not depend in any way on the width of the product at this location. Under these conditions, it appeared that, after all, it was not necessary, as one would be tempted to do, to synchronize the position of the support members at the posi tion of the small sides of the ingot mold: it suffices simply to apply these support members against the cast product with a force just sufficient to overcome the ferrostatic pressure.
  • This operating mode is made possible by the presence of the crust of solidified product which surrounds the liquid steel core formed by the product at its exit from the mold. It is this solidified crust, by the fact that it acts like stretched skin, which, with the device of the invention, automatically allows the support members to follow the movement of the short sides of the mold, provided of course that this displacement is progressive, which is always the case.
  • the solidified part 2 is supported by four wear plates 3, each fixed to a support plate 4. Also conventionally, these plates 3 and 4 are provided with means making it possible to cool the product cast by spraying with water.
  • these conventional cooling means consist of the fact that the plates 3 are pierced with a large number of cells 30 regularly distributed, while the plates 4 are pierced with the same number of small channels 40, opening out each in the center of a cell 30, these channels 40 being supplied with spray water by means of long distribution channels 41, pierced in the thickness of the plates 4 perpendicular to the channels 40 as shown, and of pipes 42 of water supply.
  • the plates 4 which relate to the short sides of the cast slab are each supported by the rod of a double-acting cylinder 5 fixed on the frame 6 of the machine. Fluid pressure of applied to the inputs 7 of this cylinder is determined, by a simple calculation taking into account the height of the liquid column at this location and the small side surface that is supported there, to balance the ferrostatic pressure at this location .
  • this plate 4 on the short side remains substantially vertical, this plate has a second fixing point 8 connected elastically, using a rod 9 and a spring. 10, to a part 11 fixed on the rod 12 of the jack 5.
  • the plates are applied against the sides of the mannequin, then on the product when the mannequin is removed and the operation is consequently started.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Casting Devices For Molds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Testing Of Engines (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

1. Device for supporting a product cast in a continuous casting plant comprising an ingot mould limited by two large sides and two small sides for shaping a product of rectangular cross-section, consisting of a liquid core (1) surrounded by a solidified crust (2) and means for moving the small sides of the ingot mould to modify the width of the product in the course of casting, the level of liquid metal in the ingot mould and, consequently, the ferrostatic pressure at each point remaining constant throughout the operation, and a device for supporting the product at the exit of the ingot mould, comprising four plates (4) and (3) for supporting the large and the small sides of the product respectively, and means for applying the said supporting plates (4) and (3) against the sides of the product, while being supported on a stationary frame (6), characterized in that the means for applying the plates (3) for supporting the small sides consist, in the case of each plate, of at least one double-acting jack (5) supported by the stationary frame and comprising two entries (7) to which there is applied a same single pressure of fluid remaining constant throughout the process of change and determined as a function of the height of the liquid column at this point and of the surface of the supported small side, so that the supporting plate (3) is maintained applied against the product with a force which is just sufficient to balance the ferrostatic pressure, and moves under the action of the solidified crust, following the movement of the small sides of the ingot mould.

Description

La présente invention se rapporte à un dispositif de support des petits côtés d'un produit coulé en sortie d'une lingotière équipant une machine de coulée continue de l'acier.The present invention relates to a device for supporting the short sides of a product cast at the outlet of an ingot mold equipping a continuous steel casting machine.

Dans une machine coulant en continu un produit de section rectangulaire, on doit généralement supporter, outre les grands côtés, également les petits côtés du produit coulé, au moins dans la zone proche de la sortie de la lingotière, là où la partie solidifiée offre le moins de résistance à la poussée due à la pression ferrostatique. Par ailleurs, une machine de coulée continue doit généralement pouvoir couler des produits de largeurs différentes, de sorte qu'il est nécessaire de prévoir sur celle-ci des moyens permettant de régler la position des dispositifs de support des petits côtés.In a machine continuously casting a product of rectangular section, one generally has to support, in addition to the long sides, also the short sides of the cast product, at least in the zone close to the outlet of the mold, where the solidified part offers the less resistance to thrust due to ferrostatic pressure. Furthermore, a continuous casting machine must generally be able to pour products of different widths, so that it is necessary to provide thereon means making it possible to adjust the position of the support devices on the short sides.

Dans les dispositifs connus jusqu'alors, on utilise des moyens permettant de modifier cette position par rapport au bâti de la machine. De tels moyens ne donnent cependant pas la garantie d'obtention d'un contact optimal entre le dispositif de support des petits côtés et le produit coulé. De plus, dans le cas où l'on utilise une lingotière dont on modifie la largeur en cours de coulée, il est nécessaire de prévoir des dispositifs complexes donc onéreux en coût de fabrication et d'entretien, pour synchroniser les déplacements de ces dispositifs de support.In the previously known devices, means are used to modify this position relative to the machine frame. However, such means do not give the guarantee of obtaining optimal contact between the support device for the short sides and the cast product. In addition, in the case where an ingot mold is used, the width of which is modified during casting, it is necessary to provide complex devices which are therefore expensive in terms of manufacturing and maintenance costs, in order to synchronize the movements of these devices. support.

Le dispositif selon la présente invention ne présente pas les inconvénients de ces dispositifs connus. Il permet en effet d'assurer toujours un bon contact avec le produit coulé, et il permet de s'abstenir d'utiliser des moyens de synchronisation complexes, comme c'était le cas jusqu'à présent, dans le cas où la lingotière est réglable en marche. Il est caractérisé en ce qu'il est muni de moyens réglables à distance permettant en permanence d'appliquer les organes de support des petits côtés contre le produit coulé avec un effort suffisant pour équilibrer la force de répulsion latérale due à la pression ferrostatique.The device according to the present invention does not have the drawbacks of these known devices. It in fact always ensures good contact with the cast product, and it makes it possible to refrain from using complex synchronization means, as was the case until now, in the case where the mold is adjustable in operation. It is characterized in that it is provided with means that can be adjusted remotely making it possible to permanently apply the support members on the short sides against the cast product with sufficient force to balance the lateral repelling force due to the ferrostatic pressure.

L'invention se base sur la remarque selon laquelle la pression latérale exercée en un point par l'acier encore liquide dépend uniquement de la hauteur de la colonne liquide en ce point, et ne dépend donc nullement de la largeur du produit à cet endroit. Dans ces conditions, il est apparu qu'il n'était somme toute pas nécessaire, comme on serait tenté de le faire à l'évidence, de synchroniser la position des organes de support à la position des petits côtés de la lingotière : il suffit simplement d'appliquer ces organes de support contre le produit coulé avec une force juste suffisante pour vaincre la pression ferrostatique. Ce mode d'opération est rendu possible par la présence de la croûte de produit solidifié qui entoure le coeur d'acier liquide formé par le produit à sa sortie de la lingotière. C'est cette croûte solidifiée, par le fait qu'elle agit comme une peau tendue, qui, avec le dispositif de l'invention, permet automatiquement aux organes de support de suivre le déplacement des petits côtés de la lingotière, à condition bien sûr que ce déplacement soit progressif, ce qui est toujours le cas.The invention is based on the remark that the lateral pressure exerted at a point by the still liquid steel depends only on the height of the liquid column at this point, and therefore does not depend in any way on the width of the product at this location. Under these conditions, it appeared that, after all, it was not necessary, as one would be tempted to do, to synchronize the position of the support members at the posi tion of the small sides of the ingot mold: it suffices simply to apply these support members against the cast product with a force just sufficient to overcome the ferrostatic pressure. This operating mode is made possible by the presence of the crust of solidified product which surrounds the liquid steel core formed by the product at its exit from the mold. It is this solidified crust, by the fact that it acts like stretched skin, which, with the device of the invention, automatically allows the support members to follow the movement of the short sides of the mold, provided of course that this displacement is progressive, which is always the case.

L'invention sera mieux comprise à l'aide de la description suivante d'un exemple de réalisation, en référence aux dessins annexés dans lesquels :

  • - la figure 1 est une vue, en demi-coupe selon la direction bb de la figure 2, donc en demi-coupe dans la direction de coulée, du dispositif de l'invention,
  • - la figure 2 est une vue, en demi-coupe selon la direction aa de la figure 1, donc en demi-coupe orthogonale à la direction de coulée, dudit dispositif de l'invention.
The invention will be better understood with the aid of the following description of an exemplary embodiment, with reference to the appended drawings in which:
  • FIG. 1 is a view, in half-section in the direction bb of FIG. 2, therefore in half-section in the direction of casting, of the device of the invention,
  • - Figure 2 is a view, in half-section along the direction aa of Figure 1, therefore in half-section orthogonal to the direction of casting, of the device of the invention.

En se reportant à l'ensemble des figures 1 et 2, on distingue le produit coulé en sortie de la lingotière (non représentée), composé d'un coeur d'acier liquide 1 entouré d'une mince croûte solidifiée 2, encore très souple en raison de sa température élevée.Referring to all of Figures 1 and 2, we distinguish the product poured out of the mold (not shown), composed of a liquid steel core 1 surrounded by a thin solidified crust 2, still very flexible due to its high temperature.

De manière classique, la partie solidifiée 2 est supportée par quatre plaques d'usure 3, fixées chacune à une plaque de support 4. De manière classique également ces plaques 3 et 4 sont pourvues de moyens permettant de refroidir le produit coulé par pulvérisation d'eau.Conventionally, the solidified part 2 is supported by four wear plates 3, each fixed to a support plate 4. Also conventionally, these plates 3 and 4 are provided with means making it possible to cool the product cast by spraying with water.

Dans l'exemple représenté, ces moyens classiques de refroidissement sont constitués par le fait que les plaques 3 sont percées d'un grand nombre d'alvéoles 30 régulièrement réparties, tandis que les plaques 4 sont percées du même nombre de petits canaux 40, débouchant chacun au centre d'une alvéole 30, ces canaux 40 étant alimentés en eau de pulvérisation par l'intermédiaire de longs canaux de distribution 41, percés dans l'épaisseur des plaques 4 perpendiculairement aux canaux 40 comme représenté, et de conduites 42 d'alimentation en eau.In the example shown, these conventional cooling means consist of the fact that the plates 3 are pierced with a large number of cells 30 regularly distributed, while the plates 4 are pierced with the same number of small channels 40, opening out each in the center of a cell 30, these channels 40 being supplied with spray water by means of long distribution channels 41, pierced in the thickness of the plates 4 perpendicular to the channels 40 as shown, and of pipes 42 of water supply.

Conformément à l'invention, les plaques 4 qui sont relatives aux petits côtés de la brame coulée sont supportées chacune par la tige d'un vérin à double effet 5 fixé sur le bâti 6 de la machine. La pression de fluide appliquée sur les entrées 7 de ce vérin est déterminée, par un calcul simple tenant compte de la hauteur de la colonne liquide à cet endroit et de la surface de petit côté que l'on y supporte, pour équilibrer la pression ferrostatique à cet endroit.According to the invention, the plates 4 which relate to the short sides of the cast slab are each supported by the rod of a double-acting cylinder 5 fixed on the frame 6 of the machine. Fluid pressure of applied to the inputs 7 of this cylinder is determined, by a simple calculation taking into account the height of the liquid column at this location and the small side surface that is supported there, to balance the ferrostatic pressure at this location .

Par ailleurs, de façon à ce qu'en absence de produit, la plaque 4 du petit côté reste sensiblement verticale, cette plaque comporte un deuxième point de fixation 8 relié élastiquement, à l'aide d'une tige 9 et d'ur ressort 10, à une pièce 11 fixée sur la tige 12 du vérin 5.Furthermore, so that in the absence of product, the plate 4 on the short side remains substantially vertical, this plate has a second fixing point 8 connected elastically, using a rod 9 and a spring. 10, to a part 11 fixed on the rod 12 of the jack 5.

Au départ de l'opération de coulée, on applique les plaques contre les côtés du mannequin, puis sur le produit lorsque le mannequin est retiré et que l'opération est par suite démarrée.At the start of the casting operation, the plates are applied against the sides of the mannequin, then on the product when the mannequin is removed and the operation is consequently started.

Claims (2)

1.- Dispositif de support des petits côtés du produit coulé en sortie d'une lingotière de coulée continue, caractérisé en ce qu'il est équipé de moyens (5) réglables à distance permettant en permanence d'appliquer les organes de support (3, 4) des petits côtés contre le produit coulé (2, 1) avec un effort suffisant pour équilibrer la force de répulsion latérale due à la pression ferrostatique.1.- Device for supporting the short sides of the product poured at the outlet of a continuous casting mold, characterized in that it is equipped with means (5) adjustable remotely allowing permanent application of the support members (3 , 4) short sides against the cast product (2, 1) with sufficient force to balance the lateral repelling force due to the ferrostatic pressure. 2.- Dispositif selon la revendication 1, caractérisé en ce que lesdits moyens sont constitués par des vérins (5) fixés au bâti de la machine de coulée continue et dont les tiges (12) portent lesdits organes de support des petits côtés.2.- Device according to claim 1, characterized in that said means are constituted by jacks (5) fixed to the frame of the continuous casting machine and whose rods (12) carry said support members from the short sides.
EP84401293A 1983-06-24 1984-06-21 Supporting device for a cast product emerging from a continuous-casting mouldand method for adjusting the device Expired EP0130887B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401293T ATE39863T1 (en) 1983-06-24 1984-06-21 DEVICE FOR SUPPORTING A STREAM EXITING FROM A CONTINUOUS CASTING MOLD AND METHOD FOR ADJUSTING THE DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8310706 1983-06-24
FR8310706A FR2547753B1 (en) 1983-06-24 1983-06-24 DEVICE FOR SUPPORTING A CAST PRODUCT AT THE OUTPUT OF A LINGOTIERE FOR CONTINUOUS CASTING

Publications (2)

Publication Number Publication Date
EP0130887A1 true EP0130887A1 (en) 1985-01-09
EP0130887B1 EP0130887B1 (en) 1989-01-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401293A Expired EP0130887B1 (en) 1983-06-24 1984-06-21 Supporting device for a cast product emerging from a continuous-casting mouldand method for adjusting the device

Country Status (7)

Country Link
EP (1) EP0130887B1 (en)
AT (1) ATE39863T1 (en)
BR (1) BR8402989A (en)
CA (1) CA1237268A (en)
DE (1) DE3476031D1 (en)
FR (1) FR2547753B1 (en)
IN (1) IN159890B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612819A1 (en) * 1987-03-23 1988-09-30 Fives Cail Babcock DEVICE FOR SUPPORTING AND COOLING A CASTING PRODUCT CONTINUES AT ITS OUTLET OF THE LINGOTIERE
EP0545104A2 (en) * 1991-11-26 1993-06-09 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for continuous casting of ingots or blooms

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB762513A (en) * 1954-02-17 1956-11-28 Boehler & Co Ag Geb Improvements in continuous casting installations
FR1191063A (en) * 1958-02-04 1959-10-16 Schloemann Ag Multi-piece die-casting shell
FR2058374A1 (en) * 1969-08-19 1971-05-28 Mannesmann Ag Continuous casting of steel bars of rectang - ular cross-section

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB762513A (en) * 1954-02-17 1956-11-28 Boehler & Co Ag Geb Improvements in continuous casting installations
FR1191063A (en) * 1958-02-04 1959-10-16 Schloemann Ag Multi-piece die-casting shell
FR2058374A1 (en) * 1969-08-19 1971-05-28 Mannesmann Ag Continuous casting of steel bars of rectang - ular cross-section

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612819A1 (en) * 1987-03-23 1988-09-30 Fives Cail Babcock DEVICE FOR SUPPORTING AND COOLING A CASTING PRODUCT CONTINUES AT ITS OUTLET OF THE LINGOTIERE
EP0286492A1 (en) * 1987-03-23 1988-10-12 Dujardin Montbard Somenor Apparatus for supporting and cooling a continuously cast product at its exiting from the mould
EP0545104A2 (en) * 1991-11-26 1993-06-09 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for continuous casting of ingots or blooms
EP0545104A3 (en) * 1991-11-26 1993-06-30 Sms Schloemann-Siemag Aktiengesellschaft Method and apparatus for continuous casting of ingots or blooms

Also Published As

Publication number Publication date
IN159890B (en) 1987-06-13
ATE39863T1 (en) 1989-01-15
FR2547753B1 (en) 1986-09-26
DE3476031D1 (en) 1989-02-16
EP0130887B1 (en) 1989-01-11
CA1237268A (en) 1988-05-31
FR2547753A1 (en) 1984-12-28
BR8402989A (en) 1985-05-28

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