EP0073160B1 - Driving and guiding mechanism for the oscillations of a continuous casting mould - Google Patents

Driving and guiding mechanism for the oscillations of a continuous casting mould Download PDF

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Publication number
EP0073160B1
EP0073160B1 EP82401295A EP82401295A EP0073160B1 EP 0073160 B1 EP0073160 B1 EP 0073160B1 EP 82401295 A EP82401295 A EP 82401295A EP 82401295 A EP82401295 A EP 82401295A EP 0073160 B1 EP0073160 B1 EP 0073160B1
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EP
European Patent Office
Prior art keywords
axis
connecting rod
support
eccentric
ingot mould
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EP82401295A
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German (de)
French (fr)
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EP0073160A1 (en
Inventor
Joel Cazaux
Joseph Pietryka
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Fives Cail Babcock SA
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Fives Cail Babcock SA
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Priority claimed from FR8115430A external-priority patent/FR2510924A1/en
Priority claimed from FR8206730A external-priority patent/FR2525132A2/en
Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT82401295T priority Critical patent/ATE10713T1/en
Publication of EP0073160A1 publication Critical patent/EP0073160A1/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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the present invention relates to a device for controlling and guiding the oscillations of a continuous casting mold according to the preamble of claim 1, see for example FR-A-1 490 342.
  • the oscillations of a continuous casting mold are generally controlled from an eccentric system, by means of connecting rods and levers.
  • the guidance of the mold which aims to keep the axis of the mold cavity in coincidence with a theoretical curve called the casting axis is provided either by a set of levers, comprising the control lever (s), or by rollers or slides cooperating with guide surfaces provided on the support of the mold.
  • the current trend is to increase the oscillation frequencies of the molds.
  • the known devices do not allow the ingot mold to oscillate at frequencies much higher than those usually used hitherto, of the order of 100 to 150 oscillations per minute, because of their inertia and the inevitable games which, at frequent high, are the cause of noisy shocks and detrimental to the mechanical strength of the control members.
  • the object of the present invention is to provide a device making it possible to oscillate the ingot mold at high frequencies, which can reach 400 oscillations per minute, while minimizing the number of members of the kinematic chain between the control eccentrics and the ingot mold and using the same members for controlling and guiding the oscillations.
  • the device which is the subject of the present invention is characterized in that it consists of a first connecting rod mounted on a first eccentric which is carried by a fixed frame and whose axis is perpendicular to the casting axis if the latter is rectilinear, or to the direction of the tangent to this axis at a point located near the outlet of the ingot mold, if the casting axis is curved, and parallel to the vertical plane containing the axis of the ingot mold, and by a second connecting rod mounted on a second eccentric also carried by said chassis and whose axis is horizontal and perpendicular to the axis of the first eccentric, the mounting of each connecting rod on the respective eccentric and on the mold or its support being designed to prevent any movement of the connecting rod. relative to said frame and to the mold in a direction parallel to the axis of the eccentric; the eccentrics are integral with shafts which are coupled so as to ensure the synchronous drive of the two eccentrics.
  • the position of the articulation points of the connecting rods on the ingot mold or its support and, consequently, the arrangement of the eccentric shafts and the connecting rods are chosen according to the shape and dimensions of the ingot mold to reduce the mechanical stresses of the ingot mold or its support and / or to facilitate access to the mold.
  • the connecting rods can be arranged on two opposite sides of the mold or on the same side.
  • connecting rods that is to say to replace one of the connecting rods or each of them by two connecting rods mounted on two eccentrics whose axes are parallel. If these two connecting rods are arranged a short distance from each other, the eccentric shafts on which they are mounted can be aligned. But if they are relatively distant from each other, as may be the case for slab ingot molds which have large dimensions, these connecting rods must be mounted on eccentric shafts whose axes are parallel and which admit as median plane the same plane perpendicular to these axes. This arrangement avoids subjecting the mold support and the entire oscillation control mechanism to excessive stress when the support expands.
  • connection points between the connecting rods and the ingot mold or its support so that the plane containing the center of the universal joint linking the first connecting rod to the ingot mold or its support and the axis of the articulation connecting the second connecting rod to the ingot mold or its support is perpendicular to the casting axis at the point where this axis meets said plane.
  • this plane is located near or coincident with the lower face of the mold and the axis of the first eccentric is parallel to said plane when the mold is in the middle position.
  • Figure 8 is an elevational view showing another embodiment of the invention.
  • the installation shown in Figures 1 and 2 is intended for the production of billets or blooms. It comprises an ingot mold 10 fixed to an oscillation table 12.
  • the cavity of the ingot mold is curved and a corset of rollers 14 mounted on a frame or a frame 16 extend this cavity to support and guide the product poured out of the ingot mold. It is designed, at least in its upper part, to force the poured product to follow a curved path, in an arc of a circle.
  • This path is symbolized in the figure by the dashed line 17, which will be called below the pouring axis and which in fact represents the trajectory of the center of any straight section of the cast product.
  • the table 12 is supported by a steering rod 18 and a balancing rod 20 mounted on eccentrics 22 and 24 ( Figures 3 and 4).
  • the mounting of each connecting rod on its eccentric prevents any movement of the connecting rod in the planes containing the axis of the eccentric.
  • the connecting rod 18 requires the ingot mold to oscillate in a direction perpendicular to the axis of the eccentric 22.
  • the connecting rod 20 keeps the table 12 in stable equilibrium while allowing its oscillations.
  • These eccentrics are integral with shafts 26 and 28 mounted on bearings 30 and 32 fixed on the chassis 16.
  • the axis XX 'of the shaft 26 is located in the plane containing the casting axis and is perpendicular to the tangent TT 'to this axis at a point 0 which is located in the outlet plane of the ingot mold, when the latter is in the middle positions.
  • the axis of the eccentric 22, which is parallel to the axis XX ', is also parallel to this plane and perpendicular to the tangent TT'.
  • the axis Y-Y 'of the shaft 28 and that of the eccentric 24 are horizontal and perpendicular to the axes of the shaft 26 and the eccentric 22.
  • the head of the connecting rod 18 is linked to the table 12 by a universal joint 34 and the head of the connecting rod 20 is articulated on the table by means of a shaft 36 whose axis is parallel to the axis YY 'of tree 28.
  • the shafts 26 and 28 are coupled by means of extensions 38 and bevel gear boxes 40 to a motor unit 42 so that the eccentrics 22 and 24 are driven at the same speed and in synchronism.
  • the eccentricity of the eccentric 24 is slightly smaller than that of the eccentric 22 so that the straight back and forth movement, in a direction parallel to the tangent TT ', which is imposed by the connecting rod 18, is accompanied by a tilting around the axis 36.
  • These combined movements allow the mold to be displaced along a trajectory which, taking into account the small amplitude of the oscillations, is very little different from the theoretical curved trajectory, at least at the exit from the mold where it is very important to respect the theoretical curvature.
  • the balancing rods 20 'and 20 are arranged symmetrically with respect to the plane of symmetry S-S' of the machine and mounted on eccentric shafts 28 'and 28", identical and aligned along the axis Y-Y'.
  • the shafts 28 'and 28 "as well as the eccentric shaft 26 on which the steering rod 18 is mounted are coupled to the three outputs of a bevel gearbox 44 which is fixed to the chassis of the machine, between the bearings 26, 28 'and 28 "eccentric shafts.
  • the input of the gearbox 44 is coupled to a geared motor group 46.
  • the connecting rods are arranged, relative to the ingot mold, opposite the center of curvature of the casting axis, but the rod 18 being closer to the mold 10 than the rods 20 'and 20 ", the eccentricity of the eccentric on which it is mounted is smaller than that of the eccentrics actuating the rods 20 'and 20 ".
  • FIGS. 6 and 7 which is intended for the production of very wide slabs, a support was produced at three points of the oscillation table 12 by splitting the connecting rod.
  • the table 12 which has been shown in broken lines in FIG. 6, has the shape of a rectangular frame and the two steering rods 18 ′ and 18 "have been placed on the short sides of the table, near the large inner side, that is to say that which is closest to the center of curvature of the cavity of the mold 10.
  • the axes Xi-X'i and X 2 -X ' 2 of the two eccentric shafts on which the connecting rods 18' and 18 "are mounted are parallel and the two eccentrics and the connecting rods have the same plane perpendicular to these axes as a plane
  • the balancing rod 20 is placed on the other long side of table 12, in the middle of it.
  • the axes X 1 -X ' 1 and X z -X' z of the eccentric shafts carrying the rods 18 'and 18 "are perpendicular to the direction of the tangent TT' to l pouring axis at a point 0 which is situated in the outlet plane of the ingot mold when the latter is in its middle position; these axes are, moreover, parallel to the vertical plane containing the axis of the casting and located on either side of it.
  • the head of the connecting rods 18 'and 18 is linked to the table 12 by a cardan joint 34', 34".
  • the axis YY 'of the eccentric shaft carrying the connecting rod 20 is horizontal and perpendicular to the axes X i -X' 1 and X z -X ' z .
  • the head of the connecting rod 20 is also linked to the table 12 by a universal joint 48 to avoid subjecting the connecting rod and the eccentric shaft to excessive stresses in the event of deformation of the table 12.
  • the balancing rod could also be split; there would then be two connecting rods arranged on the long sides of the table, in the middle, and mounted on two eccentric shafts whose parallel axes would be perpendicular to the vertical plane containing the pouring axis.
  • All the eccentric shafts are coupled by means of extensions 38 and bevel gear boxes and driven in synchronism by one or two motor groups, such as 42.
  • the table 12 is supported by a connecting rod 18 and a balancing rod 20.
  • These connecting rods could obviously be split as in the embodiments described above.
  • the axis of the shaft 36 through which the connecting rod 20 is articulated on the table 12 and the center of the universal joint 34 connecting the connecting rod 18 to the table are located in a plane whose trace on the plane of the figure is represented by the line Z-Z '. This plane meets the casting axis 17 at point 0 and is perpendicular to this axis at this point; it therefore contains the center of curvature C of the casting axis.
  • the amplitudes of the oscillations generated by the rotation of the eccentrics 22 and 24 are in the ratio of the distances separating the center of the universal joint 34 from the axis passing through the center of curvature C and perpendicular to the vertical plane containing the axis on the one hand, and the axis of the shaft 36 of this same axis passing through C, on the other hand, so that when the ingot mold oscillates the plane ZZ 'always remains perpendicular to the axis of casting at the point where this plane meets this axis.
  • Zi-Z'i and Z2-Z2 show the positions of this plane corresponding to the extreme positions, upper and lower, of the mold.
  • the axis X-X 'of the shaft 26 carrying the eccentric 22 is parallel to the plane Z-Z' and, therefore, perpendicular to the tangent T-T 'at point 0; in this position, the axis of the mold cavity coincides with the casting axis.
  • the centers of the two universal joints and / or of the two articulation shafts connecting the connecting rods 18 and 20 to the table 12 are all located in the same plane Z- Z '.
  • the description above only refers to installations with a curved ingot mold.
  • the axis of the eccentric on which the steering rod is mounted is perpendicular to the axis of the mold and, if it is inclined, parallel to the vertical plane containing this axis.
  • the eccentricities of the eccentrics actuating the steering and balancing rods are equal and the universal joint connecting the head of the steering rod to the mold or to its support can be replaced by a shaft whose axis is parallel to that of the eccentric actuating this connecting rod.

Description

La présente invention concerne un dispositif de commande et de guidage des oscillations d'une lingotière de coulée continue selon le préambule de la revendication 1, voir par exam- pie FR-A-1 490 342.The present invention relates to a device for controlling and guiding the oscillations of a continuous casting mold according to the preamble of claim 1, see for example FR-A-1 490 342.

La commande des oscillations d'une lingotière de coulée continue s'effectue généralement à partir d'un système à excentrique, par l'intermédiaire de bielles et de leviers. Le guidage de la lingotière qui a pour but de maintenir l'axe de la cavité de la lingotière en coïncidence avec une courbe théorique appelée axe de coulée est assuré, soit par un jeu de leviers, comprenant le ou les leviers de commande, soit par des galets ou des glissières coopérant avec des surfaces de guidage prévues sur le support de la lingotière. La tendance actuelle est d'augmenter les fréquences d'oscillations des lingotières. Or les dispositifs connus ne permettent pas de faire osciller la lingotière à des fréquences nettement supérieures à celles habituellement utilisées jusqu'ici, de l'ordre de 100 à 150 oscillations par minute, à cause de leur inertie et des jeux inévitables qui, à fréquence élevée, sont à l'origine de chocs bruyants et préjudiciables à la tenue mécanique des organes de commande.The oscillations of a continuous casting mold are generally controlled from an eccentric system, by means of connecting rods and levers. The guidance of the mold which aims to keep the axis of the mold cavity in coincidence with a theoretical curve called the casting axis is provided either by a set of levers, comprising the control lever (s), or by rollers or slides cooperating with guide surfaces provided on the support of the mold. The current trend is to increase the oscillation frequencies of the molds. However, the known devices do not allow the ingot mold to oscillate at frequencies much higher than those usually used hitherto, of the order of 100 to 150 oscillations per minute, because of their inertia and the inevitable games which, at frequent high, are the cause of noisy shocks and detrimental to the mechanical strength of the control members.

Le but de la présente invention est de réaliser un dispositif permettant de faire osciller la lingotière à des fréquences élevées, pouvant attein- dre 400 oscillations par minute, en réduisant au minimum le nombre d'organes de la chaîne cinématique entre les excentriques de commande et la lingotière et en utilisant les mêmes organes pour la commande et le guidage des oscillations. Le dispositif objet de la présente invention est caractérisé en ce qu'il est constitué par une première bielle montée sur un premier excentrique qui est porté par un châssis fixe et dont l'axe est perpendiculaire à l'axe de coulée si celui-ci est rectiligne, ou à la direction de la tangente à cet axe en un point situé au voisinage de la sortie de la lingotière, si l'axe de coulée est courbe, et parallèle au plan vertical contenant l'axe de la lingotière, et par une seconde bielle montée sur un second excentrique également porté par ledit châssis et dont l'axe est horizontal et perpendiculaire à l'axe du premier excentrique, le montage de chaque bielle sur l'excentrique respectif et sur la lingotière ou son support étant conçu pour empêcher tout mouvement de la bielle. par rapport au dit châssis et à la lingotière dans une direction parallèle à l'axe de l'excentrique; les excentriques sont solidaires d'arbres qui sont accouplés de façon à assurer l'entraînement en synchronisme des deux excentriques.The object of the present invention is to provide a device making it possible to oscillate the ingot mold at high frequencies, which can reach 400 oscillations per minute, while minimizing the number of members of the kinematic chain between the control eccentrics and the ingot mold and using the same members for controlling and guiding the oscillations. The device which is the subject of the present invention is characterized in that it consists of a first connecting rod mounted on a first eccentric which is carried by a fixed frame and whose axis is perpendicular to the casting axis if the latter is rectilinear, or to the direction of the tangent to this axis at a point located near the outlet of the ingot mold, if the casting axis is curved, and parallel to the vertical plane containing the axis of the ingot mold, and by a second connecting rod mounted on a second eccentric also carried by said chassis and whose axis is horizontal and perpendicular to the axis of the first eccentric, the mounting of each connecting rod on the respective eccentric and on the mold or its support being designed to prevent any movement of the connecting rod. relative to said frame and to the mold in a direction parallel to the axis of the eccentric; the eccentrics are integral with shafts which are coupled so as to ensure the synchronous drive of the two eccentrics.

La position des points d'articulation des bielles sur la lingotière ou son support et, par conséquent, la disposition des arbres à excentrique et des bielles sont choisies en fonction de la forme et des dimensions de la lingotière pour réduire les contraintes mécaniques de la lingotière ou son support et/ou pour faciliter l'accès à la lingotière. Les bielles peuvent être disposées sur deux côtés opposés de la lingotière ou sur un même côté.The position of the articulation points of the connecting rods on the ingot mold or its support and, consequently, the arrangement of the eccentric shafts and the connecting rods are chosen according to the shape and dimensions of the ingot mold to reduce the mechanical stresses of the ingot mold or its support and / or to facilitate access to the mold. The connecting rods can be arranged on two opposite sides of the mold or on the same side.

Dans certain cas,il peut être avantageux, pour réduire les contraintes mécaniques dans la lingotière ou son support, de dédoubler une ou les deux bielles, c'est-à-dire de remplacer l'une des bielles ou chacune d'elles par deux bielles montées sur deux excentriques dont les axes sont paralléles. Si ces deux bielles sont disposées à faible distance l'une de l'autre, les arbres à excentrique sur lesquels elles sont montées peuvent être alignés. Mais si elles sont relativement éloignées l'une de l'autre, comme cela peut être le cas pour des lingotières à brames qui ont des dimensions importantes, ces bielles doivent être montées sur des arbres à excentriques dont les axes sont parallèles et qui admettent comme plan médian un même plan perpendiculaire à ces axes. Cette disposition évite de soumettre le support de la lingotière et l'ensemble du mécanisme de commande des oscillations à des contraintes excessives lorsque le support se dilate.In certain cases, it may be advantageous, to reduce the mechanical stresses in the ingot mold or its support, to split one or both connecting rods, that is to say to replace one of the connecting rods or each of them by two connecting rods mounted on two eccentrics whose axes are parallel. If these two connecting rods are arranged a short distance from each other, the eccentric shafts on which they are mounted can be aligned. But if they are relatively distant from each other, as may be the case for slab ingot molds which have large dimensions, these connecting rods must be mounted on eccentric shafts whose axes are parallel and which admit as median plane the same plane perpendicular to these axes. This arrangement avoids subjecting the mold support and the entire oscillation control mechanism to excessive stress when the support expands.

Dans le cas d'une installation de coulée courbe, il est intéressant de superposer au mouvement rectiligne imposé par le premier ensemble bielle-excentrique un mouvement de basculement autour de l'axe d'articulation liant la première bielle à la lingotiére ou à son support. Ces mouvements combinés permettent de déplacer la lingotière suivant une trajectoire qui. compte tenu de la faible amplitude des oscillations et du grand rayon de courbure, est très peu différente de la trajectoire courbe théorique ou axe de coulée. Cela peut être réalisé très simplement en adoptant des excentricités différentes pour les deux excentriques, l'excentrique situé le plus près du centre de courbure de l'installation ayant une excentricité plus faible que celle de l'excentrique le plus éloigné, et en liant la lingotière ou son support à la première bielle par un joint universel: articulation à rotule, à cardan, etc.In the case of a curved casting installation, it is advantageous to superimpose on the rectilinear movement imposed by the first connecting rod-eccentric a tilting movement around the articulation axis connecting the first connecting rod to the ingot mold or to its support . These combined movements make it possible to move the ingot mold along a trajectory which. taking into account the small amplitude of the oscillations and the large radius of curvature, is very little different from the theoretical curved trajectory or axis of casting. This can be done very simply by adopting different eccentricities for the two eccentrics, the eccentric located closest to the center of curvature of the installation having a smaller eccentricity than that of the most distant eccentric, and by linking the ingot mold or its support to the first connecting rod by a universal joint: ball joint, cardan joint, etc.

Pour réduire encore, dans ce cas, les écarts entre la trajectoire effectivement suivie par la lingotière et la trajectoire théorique, notamment au niveau de l'extrémité de sortie de la lingotière où tout écart sensible entre les trajectoires réelle et théorique risque d'entraîner une déchirure du produit coulé et un écoulement du métal liquide à travers l'ouverture ainsi formée, il est avantageux de choisir les points de liaison entre les bielles et la lingotière ou son support de telle sorte que le plan contenant le centre du joint universel liant la première bielle à la lingotière ou à son support et l'axe de l'articulation liant la seconde bielle à la lingotière ou à son support soit perpendiculaire à l'axe de coulée au point où cet-axe rencontre ledit plan. De préférence, ce plan est situé près de la face inférieure de la lingotière ou confondu avec celle-ci et t'axe du premier excentrique est parallèle au dit plan lorsque la lingotière est en position médiane.To further reduce, in this case, the differences between the trajectory actually followed by the ingot mold and the theoretical trajectory, in particular at the level of the exit end of the ingot mold where any significant difference between the real and theoretical trajectories risks causing a tearing of the cast product and a flow of the molten metal through the opening thus formed, it is advantageous to choose the connection points between the connecting rods and the ingot mold or its support so that the plane containing the center of the universal joint linking the first connecting rod to the ingot mold or its support and the axis of the articulation connecting the second connecting rod to the ingot mold or its support is perpendicular to the casting axis at the point where this axis meets said plane. Preferably, this plane is located near or coincident with the lower face of the mold and the axis of the first eccentric is parallel to said plane when the mold is in the middle position.

D'autres caractéristiques de l'invention appa- raitront à la lecture de la description qui suit et se réfère aux dessins l'accompagnant qui montrent, à titres d'exemples non limitatifs, trois modes de réalisation de l'invention, et sur lesquels:

  • La figure 1 est une vue en élévation de la partie supérieure d'une machine de coulée continue courbe comportant un dispositif de commande et de guidage des'oscillations de la lingotière réalisé conformément à l'invention.
  • La figure 2 est une coupe suivant l'axe 2-2 de la figure 1.
  • La figure 3 est une coupe suivant l'axe 3-3 de la figure 1.
  • La figure 4 est une coupe suivant l'axe 4-4 de la figure 1.
  • La figure 5 est une vue analogue à la figure 2 illustrant une variante de réalisation.
  • La figure 6 est une vue en élévation de la partie supérieure d'une machine de coulée continue courbe pour la production de brames équipée d'un dispositif de commande et de guidage des oscillations de la lingotière réalisé conformément à l'invention.
  • La figure 7 est une coupe suivant l'axe 7-7 de la figure 6.
Other features of the invention appear on reading the description which follows and refers to the accompanying drawings which show, by way of nonlimiting examples, three embodiments of the invention, and in which:
  • Figure 1 is an elevational view of the upper part of a curved continuous casting machine comprising a device for controlling and guiding the oscillations of the mold produced in accordance with the invention.
  • Figure 2 is a section along the line 2-2 in Figure 1.
  • Figure 3 is a section along axis 3-3 of Figure 1.
  • Figure 4 is a section along axis 4-4 of Figure 1.
  • Figure 5 is a view similar to Figure 2 illustrating an alternative embodiment.
  • Figure 6 is an elevational view of the upper part of a curved continuous casting machine for the production of slabs equipped with a device for controlling and guiding the oscillations of the mold produced in accordance with the invention.
  • Figure 7 is a section along the axis 7-7 of Figure 6.

La figure 8 est une vue en élévation montrant un autre mode de réalisation de l'invention. L'installation représentée sur les figures 1 et 2 est destinée à la production de billettes ou de blooms. Elle comporte une lingotière 10 fixée sur une table d'oscillation 12. La cavité de la lingotiére est courbe et un corset de rouleaux 14 montés sur un châssis ou une charpente 16 prolongent cette cavité pour soutenir et guider le produit coulé à sa sortie de la lingotière. Elle est conçue, au moins dans sa partie supérieure, pour imposer au produit coulé de suivre un trajet courbe, en arc de cercle. Ce trajet est symbolisé sur la figure par la ligne en traits mixtes 17, qui sera appelée ci-après axe de coulée et qui représente en fait la trajectoire du centre d'une section droite quelconque du produit coulé. La table 12 est supportée par une bielle directrice 18 et une bielle d'équilibrage 20 montées sur des excentriques 22 et 24 (figures 3 et 4). Le montage de chaque bielle sur son excentrique interdit tout mouvement de la bielle dans les plans contenant l'axe de l'excentrique. La bielle 18 impose à la lingotière d'osciller suivant une direction perpendiculaire à l'axe de l'excentrique 22. La bielle 20 maintient la table 12 en équilibre stable tout en autorisant ses oscillations. Ces excentriques sont solidaires d'arbres 26 et 28 montés sur des paliers 30 et 32 fixés sur le châssis 16. L'axe X-X' de l'arbre 26 est situé dans le plan contenant l'axe de coulée et est perpendiculaire à la tangente TT' à cet axe en un point 0 qui est situé dans le plan de sortie de la lingotière, lorsque celle-ci est en positions médiane. L'axe de l'excentrique 22, qui est parallèle à l'axe X-X', est aussi parallèle à ce plan et perpendiculaire à la tangente TT'.Figure 8 is an elevational view showing another embodiment of the invention. The installation shown in Figures 1 and 2 is intended for the production of billets or blooms. It comprises an ingot mold 10 fixed to an oscillation table 12. The cavity of the ingot mold is curved and a corset of rollers 14 mounted on a frame or a frame 16 extend this cavity to support and guide the product poured out of the ingot mold. It is designed, at least in its upper part, to force the poured product to follow a curved path, in an arc of a circle. This path is symbolized in the figure by the dashed line 17, which will be called below the pouring axis and which in fact represents the trajectory of the center of any straight section of the cast product. The table 12 is supported by a steering rod 18 and a balancing rod 20 mounted on eccentrics 22 and 24 (Figures 3 and 4). The mounting of each connecting rod on its eccentric prevents any movement of the connecting rod in the planes containing the axis of the eccentric. The connecting rod 18 requires the ingot mold to oscillate in a direction perpendicular to the axis of the eccentric 22. The connecting rod 20 keeps the table 12 in stable equilibrium while allowing its oscillations. These eccentrics are integral with shafts 26 and 28 mounted on bearings 30 and 32 fixed on the chassis 16. The axis XX 'of the shaft 26 is located in the plane containing the casting axis and is perpendicular to the tangent TT 'to this axis at a point 0 which is located in the outlet plane of the ingot mold, when the latter is in the middle positions. The axis of the eccentric 22, which is parallel to the axis XX ', is also parallel to this plane and perpendicular to the tangent TT'.

L'axe Y-Y' de l'arbre 28 et celui de l'excentrique 24 sont horizontaux et perpendiculaires aux axes de l'arbre 26 et de l'excentrique 22.The axis Y-Y 'of the shaft 28 and that of the eccentric 24 are horizontal and perpendicular to the axes of the shaft 26 and the eccentric 22.

La tête de la bielle 18 est liée à la table 12 par une articulation à cardan 34 et la tête de la bielle 20 est articulée sur la table au moyen d'un arbre 36 dont l'axe est parallèle à l'axe Y-Y' de l'arbre 28.The head of the connecting rod 18 is linked to the table 12 by a universal joint 34 and the head of the connecting rod 20 is articulated on the table by means of a shaft 36 whose axis is parallel to the axis YY 'of tree 28.

Les arbres 26 et 28 sont accouplés au moyen d'allonges 38 et de boîtes à engrenages coniques 40 à un groupe moteur 42 de façon que les excentriques 22 et 24 soient entraînés à la même vitesse et en synchronisme.The shafts 26 and 28 are coupled by means of extensions 38 and bevel gear boxes 40 to a motor unit 42 so that the eccentrics 22 and 24 are driven at the same speed and in synchronism.

L'excentricité de l'excentrique 24 est légèrement plus petite que celle de l'excentrique 22 de sorte que le mouvement de va-et-vient rectiligne, suivant une direction parallèle à la tangente TT', qui est imposé par la bielle 18, s'accompagne d'un basculement autour de l'axe 36. Ces mouvements combinés permettent de déplacer la lingotière suivant une trajectoire qui, compte tenu de la faible amplitude des oscillations, est très peu différente de la trajectoire courbe théorique, au moins à la sortie de la lingotière où il est très important de respecter la courbure théorique.The eccentricity of the eccentric 24 is slightly smaller than that of the eccentric 22 so that the straight back and forth movement, in a direction parallel to the tangent TT ', which is imposed by the connecting rod 18, is accompanied by a tilting around the axis 36. These combined movements allow the mold to be displaced along a trajectory which, taking into account the small amplitude of the oscillations, is very little different from the theoretical curved trajectory, at least at the exit from the mold where it is very important to respect the theoretical curvature.

Dans le mode de réalisation de la figure 5, la bielle d'équilibrage a été dédoublée et les positions des bielles directrice et d'équilibrage par raport à la lingotière ont été inversées.In the embodiment of Figure 5, the balancing rod has been split and the positions of the steering rods and balancing with respect to the mold have been reversed.

Les bielles d'équilibrages 20' et 20" sont disposées symétriquement par rapport au plan de symétrie S-S' de la machine et montées sur des arbres à excentrique 28' et 28", identiques et alignés suivant l'axe Y-Y'. Les arbres 28' et 28" ainsi que l'arbre à excentrique 26 sur lequel est montée la bielle directrice 18 sont accouplés aux trois sorties d'une boîte d'engrenages coniques 44 qui est fixée sur le châssis de la machine, entre les paliers des arbres à excentrique 26, 28' et 28". L'entrée de la boîte à engrenages 44 est accouplée à un groupe moto-réducteur 46. Dans cette installation comme dans celle des figures 1 à 4, les bielles sont disposées, par rapport à la lingotière, à l'opposé du centre de courbure de l'axe de coulée, mais la bielle 18 étant plus près de la lingotière 10 que les bielles 20' et 20", l'excentricité de l'excentrique sur lequel elle est montée est plus petite que celle des excentiques actionnant les bielles 20' et 20".The balancing rods 20 'and 20 "are arranged symmetrically with respect to the plane of symmetry S-S' of the machine and mounted on eccentric shafts 28 'and 28", identical and aligned along the axis Y-Y'. The shafts 28 'and 28 "as well as the eccentric shaft 26 on which the steering rod 18 is mounted are coupled to the three outputs of a bevel gearbox 44 which is fixed to the chassis of the machine, between the bearings 26, 28 'and 28 "eccentric shafts. The input of the gearbox 44 is coupled to a geared motor group 46. In this installation as in that of FIGS. 1 to 4, the connecting rods are arranged, relative to the ingot mold, opposite the center of curvature of the casting axis, but the rod 18 being closer to the mold 10 than the rods 20 'and 20 ", the eccentricity of the eccentric on which it is mounted is smaller than that of the eccentrics actuating the rods 20 'and 20 ".

Dans l'installation représentée sur les figures 6 et 7, qui est destinée à la production de brames de grande largeur, on a réalisé un support en trois points de la table d'oscillation 12 en dédoublant la bielle directrice. Dans cette installation, la table 12, qui a été représentée en traits mixtes sur la figure 6 a la forme d'un cadre rectangulaire et les deux bielles directrices 18' et 18" ont été placées sur les petits côtés de la table, près du grand côté intérieur, c'est-à-dire celui qui est le plus près du centre de courbure de la cavité de la lingotière 10.In the installation shown in FIGS. 6 and 7, which is intended for the production of very wide slabs, a support was produced at three points of the oscillation table 12 by splitting the connecting rod. In this installation, the table 12, which has been shown in broken lines in FIG. 6, has the shape of a rectangular frame and the two steering rods 18 ′ and 18 "have been placed on the short sides of the table, near the large inner side, that is to say that which is closest to the center of curvature of the cavity of the mold 10.

Les axes Xi-X'i et X2-X'2 des deux arbres à excentrique sur lesquels sont montées les bielles 18' et 18" sont parallèles et les deux excentriques ainsi que les bielles admettent un même plan perpendiculaire à ces axes comme plan médian. La bielle d'équilibrage 20 est placée sur l'autre grand côté de la table 12, au milieu de celui-ci. Comme dans les modes de réalisation décrits ci-dessus, les axes X1-X'1 et Xz-X'z des arbres à excentrique portant les bielles 18' et 18" sont perpendiculaires à la direction de la tangente TT' à l'axe de coulée en un point 0 qui est situé dans le plan de sortie de la lingotière lorsque celle-ci est dans sa position médiane; ces axes sont, par ailleurs, parallèles au plan vertical contenant l'axe de la coulée et situés de part et d'autre de celui-ci.The axes Xi-X'i and X 2 -X ' 2 of the two eccentric shafts on which the connecting rods 18' and 18 "are mounted are parallel and the two eccentrics and the connecting rods have the same plane perpendicular to these axes as a plane The balancing rod 20 is placed on the other long side of table 12, in the middle of it. As in the embodiments described above, the axes X 1 -X ' 1 and X z -X' z of the eccentric shafts carrying the rods 18 'and 18 "are perpendicular to the direction of the tangent TT' to l pouring axis at a point 0 which is situated in the outlet plane of the ingot mold when the latter is in its middle position; these axes are, moreover, parallel to the vertical plane containing the axis of the casting and located on either side of it.

La tête des bielles 18' et 18" est liée à la table 12 par une articulation à la cardan 34', 34". L'axe Y-Y' de l'arbre à excentrique portant la bielle 20 est horizontal et perpendiculaire aux axes Xi-X'1 et Xz-X'z. La tête de la bielle 20 est aussi liée à la table 12 par une articulation à la cardan 48 pour éviter de soumettre la bielle et l'arbre à excentrique à des contraintes excessives en cas de déformation de la table 12.The head of the connecting rods 18 'and 18 "is linked to the table 12 by a cardan joint 34', 34". The axis YY 'of the eccentric shaft carrying the connecting rod 20 is horizontal and perpendicular to the axes X i -X' 1 and X z -X ' z . The head of the connecting rod 20 is also linked to the table 12 by a universal joint 48 to avoid subjecting the connecting rod and the eccentric shaft to excessive stresses in the event of deformation of the table 12.

Dans une installation de ce type, la bielle d'équilibrage pourrait aussi être dédoublée; on aurait alors deux bielles disposées sur les grands côtés de la table, en leur milieu, et montées sur deux arbres à excentrique dont les axes parallèles seraient perpendiculairs au plan vertical contenant l'axe de coulée.In an installation of this type, the balancing rod could also be split; there would then be two connecting rods arranged on the long sides of the table, in the middle, and mounted on two eccentric shafts whose parallel axes would be perpendicular to the vertical plane containing the pouring axis.

Tous les arbres à excentrique sont accouplés au moyen d'allonges 38 et de boîtes d'engrenages coniques et entraînés en synchronisme par un ou deux groupes moteurs, tels que 42. Dans lé mode de réalisation de la figure 8, la table 12 est supportée par une bielle directrice 18 et une bielle d'équilibrage 20. Ces bielles pourraient évidemment être dédoublées comme dans les modes de réalisation décrits plus haut. L'axe de l'arbre 36 par l'intermédiaire duquel la bielle 20 est articulée sur la table 12 et le centre du joint à cardan 34 reliant la bielle 18 à la table sont situés dans un plan dont la trace sur le plan de la figure est représentée par la droite Z-Z'. Ce plan rencontre l'axe de coulée 17 au point 0 et est perpendiculaire à cet axe en ce point; il contient donc le centre de courbure C de l'axe de coulée. Par ailleurs, les amplitudes des oscillations engendrées par la rotation des excentriques 22 et 24 sont dans le rapport des distances séparant le centre du joint à cardan 34 de l'axe passant par le centre de courbure C et perpendiculaire au plan vertical contenant l'axe de coulée, d'une part, et l'axe de l'arbre 36 de ce même axe passant par C, d'autre part, de sorte que lorsque la lingotière oscille le plan Z-Z' reste toujours perpendiculaire à l'axe de coulée au point .où ce plan rencontre cet axe. On a représenté en Zi-Z'i et Z2-Z2 les positions de ce plan correspondant aux positions extrêmes, supérieure et inférieure, de la lingotière.All the eccentric shafts are coupled by means of extensions 38 and bevel gear boxes and driven in synchronism by one or two motor groups, such as 42. In the embodiment of Figure 8, the table 12 is supported by a connecting rod 18 and a balancing rod 20. These connecting rods could obviously be split as in the embodiments described above. The axis of the shaft 36 through which the connecting rod 20 is articulated on the table 12 and the center of the universal joint 34 connecting the connecting rod 18 to the table are located in a plane whose trace on the plane of the figure is represented by the line Z-Z '. This plane meets the casting axis 17 at point 0 and is perpendicular to this axis at this point; it therefore contains the center of curvature C of the casting axis. Furthermore, the amplitudes of the oscillations generated by the rotation of the eccentrics 22 and 24 are in the ratio of the distances separating the center of the universal joint 34 from the axis passing through the center of curvature C and perpendicular to the vertical plane containing the axis on the one hand, and the axis of the shaft 36 of this same axis passing through C, on the other hand, so that when the ingot mold oscillates the plane ZZ 'always remains perpendicular to the axis of casting at the point where this plane meets this axis. Zi-Z'i and Z2-Z2 show the positions of this plane corresponding to the extreme positions, upper and lower, of the mold.

Lorsque la lingotière est en position médiane, l'axe X-X' de l'arbre 26 portant l'excentrique 22 est parallèle au plan Z-Z' et, par conséquent, perpendiculaire à la tangente T-T' au point 0; dans cette position, l'axe de la cavité de la lingotière coïncide avec l'axe de coulée.When the mold is in the middle position, the axis X-X 'of the shaft 26 carrying the eccentric 22 is parallel to the plane Z-Z' and, therefore, perpendicular to the tangent T-T 'at point 0; in this position, the axis of the mold cavity coincides with the casting axis.

Lorsque la lingotière est éloignée, vers le haut ou vers le bas, de sa position médiane, son axe s'écarte de l'axe de coulée mais grâce aux conditions imposées - excentricités différentes pour les excentriques 22 et 24 et plan Z-Z' maintenu orthogonal à l'axe de coulée - et compte tenu de la faible amplitude des oscillations et du grand rayon de courbure de l'axe de coulée, les écarts entre la trajectoire réelle de la lingotière et l'axe de coulée restent très faibles, surtout au voisinage du point 0 qui est situé près de la face inférieure de la lingotière ou dans le plan de celle-ci, et dans cette zone l'axe de la cavité de la lingotière reste toujours parallèle à l'axe de coulée.When the ingot mold is moved up or down from its middle position, its axis deviates from the casting axis but thanks to the conditions imposed - different eccentricities for eccentrics 22 and 24 and plane ZZ 'maintained orthogonal to the casting axis - and given the small amplitude of the oscillations and the large radius of curvature of the casting axis, the differences between the actual trajectory of the ingot mold and the casting axis remain very small, especially at near point 0 which is located near the underside of the mold or in the plane thereof, and in this area the axis of the mold cavity always remains parallel to the casting axis.

Si les bielles directrices et/ou les bielles d'équilibrage sont dédoublées, les centres des deux joints à cardan et/ou des deux arbres d'articulation liant les bielles 18 et 20 à la table 12 sont tous situés dans le même plan Z-Z'.If the connecting rods and / or the balancing rods are split, the centers of the two universal joints and / or of the two articulation shafts connecting the connecting rods 18 and 20 to the table 12 are all located in the same plane Z- Z '.

La description ci-dessus ne se réfère qu'à des installations avec lingotière courbe. Dans le cas d'application de l'invention à des installations à lingotière droite, c'est-à-dire dont l'axe est rectiligne, l'axe de l'excentrique sur lequel est montée la bielle directrice est perpendiculaire à l'axe de la lingotière et, si celui-ci est incliné, parallèle au plan vertical contenant cet axe. Dans ce cas, les excentricités des excentriques actionnant les bielles directrice et d'équilibrage sont égales et le joint universel reliant la tête de la bielle directrice à la lingotière ou à son support peut être remplacé par un arbre dont l'axe est parallèle à celui de l'excentrique actionnant cette bielle.The description above only refers to installations with a curved ingot mold. In the case of application of the invention to installations with a straight ingot mold, that is to say one whose axis is rectilinear, the axis of the eccentric on which the steering rod is mounted is perpendicular to the axis of the mold and, if it is inclined, parallel to the vertical plane containing this axis. In this case, the eccentricities of the eccentrics actuating the steering and balancing rods are equal and the universal joint connecting the head of the steering rod to the mold or to its support can be replaced by a shaft whose axis is parallel to that of the eccentric actuating this connecting rod.

De nombreuses modifications peuvent être apportées aux modes de réalisation décrits par l'emploi de moyens techniques équivalents et il doit être entendu que toutes ces modifications entrent dans le cadre de l'invention comme revendiqué.Many modifications can be made to the embodiments described by the use of equivalent technical means and it should be understood that all these modifications come within the scope of the invention as claimed.

Claims (13)

1. Driving and guiding device for the oscillations of a continuous casting mould (10) including several connecting rods mounted on eccentrics, which are supported by a stationary frame (16), and connected through hinges to the ingot mould (10) or to its support, characterized in that it is constituted by a first connecting rod (18) mounted on a first eccentric (22), the axis of which is perpendicular to the casting axis or to the direction of the tangent to this axis at a point located in the vieinity of the outlet of the mould and parallel to the vertical plane containing the casting axis, and by a second connecting rod (20) mounted on a second. eccentric (24) the axis of which is horizontal and perpendicular to the axis of the first eccentric, and in that the mounting of each connecting rod on the respective eccentric and on the mould (10) or its support (12) is designed to prevent any movement of the connecting rod with respect to the said frame (16) or to the mould in a direction parallel to the axis of the said eccentric.
2. Device according to claim 1, characterized in that the two connecting rods are arranged on two opposite sides of the ingot mould.
3. Device according to claim 1, characterized in that the two connecting rods are arranged on one same side of the ingot mould.
4. Device according to claim 1, 2 or 3, characterized in that the head of the second connecting rod (20) hinges with the ingot mould (10) or its support (12) through a shaft (35) the axis of which is parallel to the axis (Y-Y') of the eccentric (24) on which the connecting rod is mounted.
5. Device according to claim 4, for the drive and guiding of the oscillations of a straight ingot mould, characterized in that the head of the first connecting rod also hinges with the ingot mould or its support through a shaft the axis of which is parallel to the axis of the eccentric on which the connecting rod is mounted.
6. Device according to claim 4 for the drive and guiding of the oscillations of a curved ingot mould, characterized in that the two eccentrics, which are driven in synchronism, have different eccentricities, and the head of the first connecting rod (18) is linked to the ingot mould through a universal joint (34).
7. Device according to claim 6, characterized in that the plane (Z-Z') containing the centre of the universal joint (34) linking the first conncect- ing rod (18) to the ingot mould (10) or to its support (12) and the axis of the hinge (36) linking the second connecting rod (20) to the ingot mould or to its support is perpendicular to the casting axis (17) at the point (0) where this axis meets the said plane.
8. Device according to claim 7, characterized in that the amplitudes of the oscillations communicated to the ingot mould (10) through the first and second eccentrics (22 and 24) are in the same ratio as the distances between, on the one hand, the centre of the said universal joint (34) and the axis passing through the centre of curvature (C) of the casting axis and perpendicular to the plane containing the latter and, on the other hand, the axis of the hinge (36) linking the second connecting rod (20) to the ingot mould (10) or to its support (12) and the said axis passing through the centre of curvature (C) of the casting axis.
9. Device according to claim 7 or 8, characterized in that the point (O) where the plane (Z-Z') containing the centre of the universal joint (34) and the axis of the hinge (36) cuts the casting axis (17) is located in the vicinity of the lower face of the ingot mould (10) or coincides with the plane of the latter.
10. Device according to anyone of the preceding claims, characterized in that the second connecting rod is split into two, the two connecting rods (20', 20") replacing the single connecting rod being mounted on two eccentric shafts (28, 28") aligned according to a same axis and axially spaced one from the other, and these two shafts as well as the eccentric shaft (25) on which is mounted the first connecting rod (18) are coupled to the outputs of a same bevel gear box (44) located between the said shafts.
11. Device according to claim 1 or 7 for the drive and the guiding of the oscillations of a slab ingot mould (10) secured to a support (12) constituted by a rectangular frame, characterized in that the first connecting rod is split into two, and the two connecting rods (18', 18") replacing the single connecting rod are arranged on the two small sides of the said support (12) in such a way that they admit as a median plane a same plane perpendicular to the axes (X1-X'1, X2-X'2) of the respective eccentrics which are parallel to the small sides of the support, and the second connecting rod (20) is arranged on one of the large sides of the support (12) in its middle, the axis of the eccentric on which this second connecting rod is mounted being parallel to the large side of the support.
12. Device according to claim 1, for the drive and guiding of the oscillations of a curved ingot mould, characterized in that the accentrics of the first connecting rods (18', 18") on the one hand, and of the second connecting rod (20); on the other hand, have different eccentricities, and the head of the first connecting rods (18', 18") is linked to the support (12) through an universal joint.
13. Device according to claim 12, characterized in that the head of the second connecting rod (20) is linked to the support (12) through an universal joint.
EP82401295A 1981-08-10 1982-07-09 Driving and guiding mechanism for the oscillations of a continuous casting mould Expired EP0073160B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82401295T ATE10713T1 (en) 1981-08-10 1982-07-09 DRIVE AND OSCILLATION GUIDE DEVICE OF A CONTINUOUS CASTING MOLD.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8115430A FR2510924A1 (en) 1981-08-10 1981-08-10 Mould oscillation drive unit for continuous casting plant - using double eccentric drive to permit high speed oscillation of mould
FR8115430 1981-08-10
FR8206730 1982-04-20
FR8206730A FR2525132A2 (en) 1982-04-20 1982-04-20 Mould oscillation drive unit for continuous casting plant - using double eccentric drive to permit high speed oscillation of mould

Publications (2)

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EP0073160A1 EP0073160A1 (en) 1983-03-02
EP0073160B1 true EP0073160B1 (en) 1984-12-12

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EP82401295A Expired EP0073160B1 (en) 1981-08-10 1982-07-09 Driving and guiding mechanism for the oscillations of a continuous casting mould

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EP (1) EP0073160B1 (en)
DE (1) DE3261543D1 (en)

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US4577277A (en) * 1983-03-07 1986-03-18 Kabushiki Kaisha Kobe Seiko Sho Method and apparatus of continuous casting by the use of mold oscillating system
DE3403598A1 (en) * 1984-02-02 1985-08-08 SMS Schloemann-Siemag AG, 4000 Düsseldorf GUIDE DEVICE FOR AN OSCILLATING DRIVEN CONTINUOUS CASTING CHOCOLATE
FR2569589B1 (en) * 1984-08-29 1986-09-05 Fives Cail Babcock MECHANISM FOR CONTROLLING THE OSCILLATIONS OF A CONTINUOUS CASTING LINGOTIERE
IT1181219B (en) * 1984-09-17 1987-09-23 Danieli Off Mecc CONTINUOUS CASTING WITH MULTI-PURPOSE AGITATORS
AT382540B (en) * 1985-06-27 1987-03-10 Voest Alpine Ag CONTINUOUS CASTING MACHINE WITH A CHOCOLATE STORED ON AN OSCILLATING LIFTING TABLE
FR2593098B1 (en) * 1986-01-17 1988-04-01 Fives Cail Babcock IMPROVEMENTS IN CONTINUOUS CASTING MACHINES.
US4953613A (en) * 1987-02-16 1990-09-04 Thyssen Edelstahlwerke Ag Lifting device on a continuous casting mold
DE3925939A1 (en) * 1989-08-03 1991-02-07 Mannesmann Ag CONTINUOUS CASTING SYSTEM WITH A CHILLER OSCILLATION DEVICE
US5219029A (en) * 1992-03-09 1993-06-15 Gunther Behrends Oscillator for continuous casting mold

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US3343592A (en) * 1965-09-22 1967-09-26 Concast Inc Reciprocating continuous casting curved mold mounting system
FR1490342A (en) * 1966-08-26 1967-07-28 Device for oscillating the passage shell in continuous metal casting plants
US3523571A (en) * 1967-03-01 1970-08-11 Vitaly Maximovich Niskovskikh Mold joggler for continuous casting
DE1758554A1 (en) * 1968-06-26 1971-02-11 Schloemann Ag Device for guiding oscillating driven continuous casting molds
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AT328120B (en) * 1973-06-09 1976-03-10 Schloemann Siemag Ag CONTINUOUS CASTING PLANT WITH A CHILL CARRIAGE SWIVELING OUT OF THE CASTING POSITION
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IT1104414B (en) * 1978-08-23 1985-10-21 Continua Int DEVICE FOR GIVING THE OSCILLATORY MOVEMENT TO THE TABLET OPENED BY A CASTING LINE IN PLANTS FOR THE CONTINUOUS CASTING OF METALS, IN PARTICULAR STEEL
DE3062086D1 (en) * 1979-12-19 1983-03-24 Concast Holding Ag Device for oscillating a continuous casting mould

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US4480678A (en) 1984-11-06
DE3261543D1 (en) 1985-01-24

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