EP0546885A1 - Cylinder for a metal strip continuous casting machine, continous casting machine containing such a cylinder and process for making such a cylinder - Google Patents

Cylinder for a metal strip continuous casting machine, continous casting machine containing such a cylinder and process for making such a cylinder Download PDF

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Publication number
EP0546885A1
EP0546885A1 EP92403219A EP92403219A EP0546885A1 EP 0546885 A1 EP0546885 A1 EP 0546885A1 EP 92403219 A EP92403219 A EP 92403219A EP 92403219 A EP92403219 A EP 92403219A EP 0546885 A1 EP0546885 A1 EP 0546885A1
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EP
European Patent Office
Prior art keywords
cylinder
roughness
casting machine
groove
burnishing
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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
EP92403219A
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German (de)
French (fr)
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EP0546885B1 (en
Inventor
Jean-Michel Damasse
Jean-Marie Osswald
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Thyssen Stahl AG
USINOR SA
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Thyssen Stahl AG
USINOR Sacilor SA
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Publication of EP0546885A1 publication Critical patent/EP0546885A1/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
    • B22D11/06—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
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0674—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for machining
    • 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
    • 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
    • B22D11/0648—Casting surfaces
    • B22D11/0651—Casting wheels

Definitions

  • the invention relates to a cylinder for a machine for continuously casting thin metal strips such as a machine for casting between two cylinders or on a cylinder.
  • a casting machine comprises at least one cylinder whose surface, or table, comes into contact with the cast metal and which ensures the forming, the solidification, the drive and the guidance of the strip.
  • the roughnesses of the extreme and central parts are very distinct and are obtained, for example, by burnishing the surface of the cylinders. On these cylinders, the roughness varies discontinuously along a generator. This results in a drawback: at the right of the discontinuity, a mark is formed on the strip which can locally weaken the strip and lead to its rupture along this mark. It then appears, on the bank, narrow ribbons which separate from the strip, get tangled and evacuate badly, which can lead to stopping the casting.
  • the object of the present invention is to provide cylinders which avoid the aforementioned drawback while ensuring good training of the strip during casting.
  • the subject of the invention is a cylinder for a machine for continuously casting thin metal strips between two cylinders or on a cylinder comprising at least one cylinder whose surface coming into contact with the cast metal has a different roughness in the extreme zones of the cylinder close to its axial ends and in the central zone, said roughness varying continuously along any generatrix of said cylinder.
  • the roughness of the end zones is greater than the roughness of the central zone.
  • the subject of the invention is finally a method for producing a cylinder according to which a helical groove having the axis, the axis of the cylinder, is created by machining with removal of chips on the surface of the cylinder.
  • the pitch of the propeller formed by the groove and the depth of the groove can be variable along a generatrix of the cylinder.
  • Figure 1 is a schematic side view of a cylinder according to the invention.
  • Figure 2 is a curve showing the evolution of roughness along a generatrix of the cylinder.
  • Figure 4 is a section near the surface of a cylinder whose roughness was obtained by machining.
  • the cylinder shown in Figure 1 corresponds to the invention. It has a generally cylindrical table 1 which is partially in contact with the cast metal when the continuous strip casting machine on which it is mounted is in service.
  • This cylinder has two lateral ends 2 and 3.
  • the table 1 of the cylinder has a certain roughness, but this roughness is not constant.
  • the roughness measured by the normalized coefficient R z is preferably between 50 and 300 ⁇ m, and in the central part 6, between 20 and 150 ⁇ m, for example respectively 150 ⁇ m and 80 ⁇ m.
  • the peculiarity of this cylinder is that the roughness varies continuously and gradually when moving along a generator of the cylinder. This is what is shown in FIG. 2.
  • Parts A and A ′ of curve 7 represent the roughness in the extreme zones. This roughness is maximum near the lateral ends of the cylinder then decreases regularly until the value of part B of the curve corresponding to the central zone of the cylinder.
  • the end zones can have a width of approximately 10 mm.
  • This roughness is necessary to have good contact between the cylinder and the thin strip during casting.
  • the greater roughness of the extreme zones is necessary to have a good training of the edges of the strip.
  • no discontinuities are created over the width of the strip, which prevents it from breaking along the discontinuity and to form ribbons on each side which would disturb the evacuation of the strip.
  • the roughness can be obtained by different methods.
  • the surface of the cylinder is burnished.
  • the burnishing pressure is gradually varied as the burnishing tool moves along the cylinder table. In the extreme zones, this pressure is high and then is gradually reduced to a lower value corresponding to the roughness of the central zone.
  • the burnishing operation which is carried out by pushing the metal back into hollow grooves, creates bumps which cause the cylinder to swell. This swelling of the cylinder is all the more important as the roughness obtained is important.
  • a cylinder according to the invention the generators of which are initially rectilinear, would have a larger outside diameter in the extreme zones than in the central zone, which would lead to a strip whose edges would be thinner than the central part.
  • the central zone of the cylinder 8 is cylindrical and of a diameter close to the final diameter desired for the cylinder.
  • the end zones 9 and 10 are machined in a slightly conical manner, so that the diameters in the vicinity of the faces 11 and 12 are smaller than the diameter of the table.
  • a person skilled in the art knows how to determine the swelling caused by burnishing. He therefore knows how to determine the conicity which must be given by machining to the extreme zones in order to have, after burnishing, a cylinder of constant diameter.
  • the roughness is obtained by machining with removal of chips.
  • a helical groove 20 with contiguous turns is created thereon having as axis the axis of the cylinder 21.
  • the surface of the cylinder 21 has a succession of hollows 23 and of bumps 24.
  • the recesses 23 correspond to the bottom of the groove 20 and the bumps 24 at the junction between two successive turns.
  • This groove 20 is obtained by machining by turning with a significant advance of the tool. If the advance at each turn is a , the groove 20 has a depth h ; if the advance is a 'larger than a, the depth of the groove 20 is h' greater than h.
  • the roughness which corresponds to the depth of the groove 20 can be varied.
  • a large advance will be chosen in the zones of the surface of the cylinder which are located near the lateral ends of the latter and a weaker advance in the middle zone.
  • the advance is varied gradually to obtain a roughness which varies continuously along a generatrix of the surface of the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Metal Rolling (AREA)

Abstract

The surface of the cylinder (1) coming into contact with the cast metal has a roughness which varies continuously along any generatrix of the cylinder (1). The roughness is generally greater in the end zones (4, 5) of the cylinder (1) than in the central zone (6). The roughness may be obtained by burnishing or by machining with removal of flakes. <IMAGE>

Description

L'invention est relative à un cylindre pour une machine de coulée continue de bandes métalliques minces telle qu'une machine de coulée entre deux cylindres ou sur un cylindre. Une telle machine de coulée comporte au moins un cylindre dont la surface, ou table, vient en contact avec le métal coulé et qui assure le formage, la solidification, l'entraînement et le guidage de la bande.The invention relates to a cylinder for a machine for continuously casting thin metal strips such as a machine for casting between two cylinders or on a cylinder. Such a casting machine comprises at least one cylinder whose surface, or table, comes into contact with the cast metal and which ensures the forming, the solidification, the drive and the guidance of the strip.

La demande de brevet français publiée sous le N° FR-A-2.654.659 décrit un cylindre pour un dispositif de coulée continue de bandes métalliques minces, tel qu'une machine de coulée continue entre deux cylindres ou sur un cylindre, présentant des parties extrêmales dont la rugosité est supérieure à la rugosité de la partie centrale de la table. Par parties extrêmales, on entend des zones circonférentielles de la surface situées près des extrémités latérales du cylindre. Par partie centrale de la table, on entend la zone circonférentielle de la surface comprise entre les deux parties extrêmales précédemment définies. L'avantage de ces rugosités différentes est de favoriser l'entraînement de la bande mince pendant la coulée.The French patent application published under the number FR-A-2,654,659 describes a cylinder for a device for the continuous casting of thin metal strips, such as a machine for continuous casting between two cylinders or on a cylinder, having parts extremities whose roughness is greater than the roughness of the central part of the table. By end portions is meant circumferential areas of the surface located near the lateral ends of the cylinder. The term “central part of the table” is understood to mean the circumferential zone of the surface lying between the two extreme parts previously defined. The advantage of these different roughnesses is to promote the entrainment of the thin strip during casting.

Les rugosités des parties extrêmales et centrale sont bien distinctes et sont obtenues, par exemple, par galetage de la surface des cylindres. Sur ces cylindres, la rugosité varie de façon discontinue le long d'une génératrice. Il en résulte un inconvénient : au droit de la discontinuité, il se forme sur la bande une marque qui peut affaiblir localement la bande et conduire à sa rupture le long de cette marque. Il apparaît alors, en rive, des rubans étroits qui se séparent de la bande, s'emmêlent et s'évacuent mal, ce qui peut conduire à l'arrêt de la coulée.The roughnesses of the extreme and central parts are very distinct and are obtained, for example, by burnishing the surface of the cylinders. On these cylinders, the roughness varies discontinuously along a generator. This results in a drawback: at the right of the discontinuity, a mark is formed on the strip which can locally weaken the strip and lead to its rupture along this mark. It then appears, on the bank, narrow ribbons which separate from the strip, get tangled and evacuate badly, which can lead to stopping the casting.

Le but de la présente invention est de proposer des cylindres qui évitent l'inconvénient précité tout en assurant un bon entraînement de la bande pendant la coulée.The object of the present invention is to provide cylinders which avoid the aforementioned drawback while ensuring good training of the strip during casting.

A cette fin, l'invention a pour objet un cylindre pour une machine de coulée continue de bandes métalliques minces entre deux cylindres ou sur un cylindre comportant au moins un cylindre dont la surface venant en contact avec le métal coulé présente une rugosité différente dans les zones extrêmales du cylindre voisines de ses extrémités axiales et dans la zone centrale, ladite rugosité variant de manière continue le long d'une génératrice quelconque dudit cylindre. De façon préférentielle, la rugosité des zones extrêmales est supérieure à la rugosité de la zone centrale.To this end, the subject of the invention is a cylinder for a machine for continuously casting thin metal strips between two cylinders or on a cylinder comprising at least one cylinder whose surface coming into contact with the cast metal has a different roughness in the extreme zones of the cylinder close to its axial ends and in the central zone, said roughness varying continuously along any generatrix of said cylinder. Preferably, the roughness of the end zones is greater than the roughness of the central zone.

L'invention a également pour objet un procédé pour la réalisation d'un cylindre selon lequel on réalise un galetage à pression variable de la surface dudit cylindre pour obtenir la rugosité. Avant le galetage, on peut usiner de façon légèrement conique les zones extrêmales du cylindre de telle sorte qu'après galetage, les génératrices de la surface externe dudit cylindre soient rectilignes.The invention also relates to a method for producing a cylinder according to which a variable pressure roller burnishing is carried out on the surface of said cylinder to obtain roughness. Before burnishing, the end regions of the cylinder can be machined slightly conical so that after burnishing, the generatrices of the external surface of said cylinder are rectilinear.

L'invention a enfin pour objet un procédé pour la réalisation d'un cylindre selon lequel on crée par usinage avec enlèvement de copeaux à la surface du cylindre un sillon hélicoïdal ayant pour axe, l'axe du cylindre. Le pas de l'hélice formée par le sillon et la profondeur du sillon peuvent être variables le long d'une génératrice du cylindre.The subject of the invention is finally a method for producing a cylinder according to which a helical groove having the axis, the axis of the cylinder, is created by machining with removal of chips on the surface of the cylinder. The pitch of the propeller formed by the groove and the depth of the groove can be variable along a generatrix of the cylinder.

L'invention va maintenant être décrite de façon plus détaillée en regard des figures annexées.The invention will now be described in more detail with reference to the appended figures.

La figure 1 est une vue de côté schématique d'un cylindre suivant l'invention.Figure 1 is a schematic side view of a cylinder according to the invention.

La figure 2 est une courbe montrant l'évolution de la rugosité le long d'une génératrice du cylindre.Figure 2 is a curve showing the evolution of roughness along a generatrix of the cylinder.

La figure 3 est une vue de côté d'un cylindre brut d'usinage.Figure 3 is a side view of a rough machining cylinder.

La figure 4 est une coupe au voisinage de la surface d'un cylindre dont la rugosité a été obtenue par usinage.Figure 4 is a section near the surface of a cylinder whose roughness was obtained by machining.

Le cylindre représenté à la figure 1 correspond à l'invention. Il a une table 1 généralement cylindrique qui est partiellement au contact du métal coulé lorsque la machine de coulée continue de bandes minces sur lequel il est monté est en service.The cylinder shown in Figure 1 corresponds to the invention. It has a generally cylindrical table 1 which is partially in contact with the cast metal when the continuous strip casting machine on which it is mounted is in service.

Ce cylindre comporte deux extrémités latérales 2 et 3. La table 1 du cylindre a une certaine rugosité, mais cette rugosité n'est pas constante. Dans les zones extrêmales 4 et 5 situées près des extrémités latérales 2 et 3, la rugosité mesurée par le coefficient normalisé Rz est préférentiellement comprise entre 50 et 300 µm,et dans la partie centrale 6, entre 20 et 150 µm, par exemple respectivement 150 µm et 80 µm. La particularité de ce cylindre est que la rugosité varie continuement et progressivement lorsqu'on se déplace le long d'une génératrice du cylindre. C'est ce qui est représenté à la figure 2. Les parties A et A' de la courbe 7 représentent la rugosité dans les zones extrêmales. Cette rugosité est maximale près des extrémités latérales du cylindre puis décroît régulièrement jusqu'à la valeur de la partie B de la courbe correspondant à la zone centrale du cylindre.This cylinder has two lateral ends 2 and 3. The table 1 of the cylinder has a certain roughness, but this roughness is not constant. In the extreme zones 4 and 5 located near the lateral ends 2 and 3, the roughness measured by the normalized coefficient R z is preferably between 50 and 300 μm, and in the central part 6, between 20 and 150 μm, for example respectively 150 µm and 80 µm. The peculiarity of this cylinder is that the roughness varies continuously and gradually when moving along a generator of the cylinder. This is what is shown in FIG. 2. Parts A and A ′ of curve 7 represent the roughness in the extreme zones. This roughness is maximum near the lateral ends of the cylinder then decreases regularly until the value of part B of the curve corresponding to the central zone of the cylinder.

Pour un cylindre ayant une largeur totale de table de 800 mm, les zones extrêmales peuvent avoir une largeur d'environ 10 mm.For a cylinder with a total table width of 800 mm, the end zones can have a width of approximately 10 mm.

Cette rugosité est nécessaire pour avoir un bon contact entre le cylindre et la bande mince en cours de coulée. La rugosité plus importante des zones extrêmales est nécessaire pour avoir un bon entraînement des rives de la bande. Avec une variation régulière de la rugosité, on ne crée pas de discontinuités sur la largeur de la bande, ce qui évite à celle-ci de se rompre le long de la discontinuité et de former de chaque côté des rubans qui viendraient perturber l'évacuation de la bande.This roughness is necessary to have good contact between the cylinder and the thin strip during casting. The greater roughness of the extreme zones is necessary to have a good training of the edges of the strip. With a regular variation in roughness, no discontinuities are created over the width of the strip, which prevents it from breaking along the discontinuity and to form ribbons on each side which would disturb the evacuation of the strip.

La rugosité peut être obtenue par différents procédés.The roughness can be obtained by different methods.

Selon un premier procédé on effectue un galetage de la surface du cylindre.According to a first method, the surface of the cylinder is burnished.

Pour obtenir une rugosité variant régulièrement, on fait varier progressivement la pression de galetage au fur et à mesure que l'outil de galetage se déplace le long de la table du cylindre. Dans les zones extrêmales, cette pression est importante puis est réduite progressivement jusqu'à une valeur plus faible correspondant à la rugosité de la zone centrale.To obtain a regularly varying roughness, the burnishing pressure is gradually varied as the burnishing tool moves along the cylinder table. In the extreme zones, this pressure is high and then is gradually reduced to a lower value corresponding to the roughness of the central zone.

L'homme de métier sait adapter la pression de galetage à la rugosité qu'il veut obtenir ; il peut donc déterminer les variations de cette pression.A person skilled in the art knows how to adapt the burnishing pressure to the roughness that he wants to obtain; it can therefore determine the variations of this pressure.

L'opération de galetage qui se fait en repoussant le métal à l'intérieur de rainures en creux, crée des bosses qui provoquent un gonflement du cylindre. Ce gonflement du cylindre est d'autant plus important que la rugosité obtenue est importante.The burnishing operation, which is carried out by pushing the metal back into hollow grooves, creates bumps which cause the cylinder to swell. This swelling of the cylinder is all the more important as the roughness obtained is important.

Un cylindre selon l'invention dont les génératrices seraient initialement rectilignes aurait un diamètre extérieur plus important dans les zones extrêmales que dans la zone centrale, ce qui conduirait à une bande dont les rives seraient plus minces que la partie centrale.A cylinder according to the invention, the generators of which are initially rectilinear, would have a larger outside diameter in the extreme zones than in the central zone, which would lead to a strip whose edges would be thinner than the central part.

Pour éviter cette non rectangularité de la section transversale de la bande, on peut usiner le cylindre 8 avant galetage comme cela est représenté à la figure 3. La zone centrale du cylindre 8 est cylindrique et d'un diamètre voisin du diamètre final souhaité pour le cylindre. Les zones extrêmales 9 et 10 sont usinées de façon légèrement conique, de façon que les diamètres au voisinage des faces 11 et 12 soient plus faibles que le diamètre de la table.To avoid this non-rectangularity of the cross section of the strip, it is possible to machine the cylinder 8 before burnishing as shown in FIG. 3. The central zone of the cylinder 8 is cylindrical and of a diameter close to the final diameter desired for the cylinder. The end zones 9 and 10 are machined in a slightly conical manner, so that the diameters in the vicinity of the faces 11 and 12 are smaller than the diameter of the table.

Après un galetage plus important dans les zones extrêmales que dans la partie centrale, un tel cylindre aura un diamètre à peu près constant sur toute sa largeur.After a larger burnishing in the extreme areas than in the central part, such a cylinder will have an approximately constant diameter over its entire width.

L'homme de métier sait déterminer le gonflement engendré par le galetage. Il sait donc déterminer la conicité qu'il faut donner par usinage aux zones extrêmales pour avoir, après galetage, un cylindre de diamètre constant.A person skilled in the art knows how to determine the swelling caused by burnishing. He therefore knows how to determine the conicity which must be given by machining to the extreme zones in order to have, after burnishing, a cylinder of constant diameter.

Selon un second procédé la rugosité est obtenue par usinage avec enlèvement de copeaux.According to a second method, the roughness is obtained by machining with removal of chips.

Pour obtenir une rugosité sur la surface du cylindre 21 (figure 4) on crée sur celle-ci un sillon 20 hélicoïdal à spires jointives ayant pour axe, l'axe du cylindre 21. La surface du cylindre 21 présente une succession de creux 23 et de bosses 24. Les creux 23 correspondent au fond du sillon 20 et les bosses 24 à la jonction entre deux spires successives.To obtain a roughness on the surface of the cylinder 21 (FIG. 4), a helical groove 20 with contiguous turns is created thereon having as axis the axis of the cylinder 21. The surface of the cylinder 21 has a succession of hollows 23 and of bumps 24. The recesses 23 correspond to the bottom of the groove 20 and the bumps 24 at the junction between two successive turns.

Ce sillon 20 est obtenu par l'usinage par tournage avec une avance importante de l'outil. Si l'avance à chaque tour est a, le sillon 20 a une profondeur h ; si l'avance est a' plus grande que a, la profondeur du sillon 20 est h' plus grande que h.This groove 20 is obtained by machining by turning with a significant advance of the tool. If the advance at each turn is a , the groove 20 has a depth h ; if the advance is a 'larger than a, the depth of the groove 20 is h' greater than h.

Ainsi, en faisant varier l'avance en cours d'usinage de la surface du cylindre 21, on peut faire varier la rugosité qui correspond à la profondeur du sillon 20.Thus, by varying the advance during machining of the surface of the cylinder 21, the roughness which corresponds to the depth of the groove 20 can be varied.

De préférence, on choisira une avance importante dans les zones de la surface du cylindre qui se trouvent près des extrémités latérales de celui-ci et une avance plus faible dans la zone médiane.Preferably, a large advance will be chosen in the zones of the surface of the cylinder which are located near the lateral ends of the latter and a weaker advance in the middle zone.

A titre d'exemple non limitatif, on choisit une avance de 0,35 mm par tour sur les 15 premiers mm et les 15 derniers mm de la table du cylindre à partir de ses extrémités latérales et une avance de 0,15 mm/tour sur la zone médiane de la table. On obtient ainsi une rugosité Rz de 150 µm sur les zones où l'avance est de 0,35 mm/tour et une rugosité de 80 µm sur la zone où l'avance est de 0,15 mm/tour.By way of nonlimiting example, we choose an advance of 0.35 mm per revolution over the first 15 mm and the last 15 mm of the cylinder table from its lateral ends and an advance of 0.15 mm / revolution on the middle area of the table. A roughness Rz is thus obtained 150 µm on the areas where the feed is 0.35 mm / turn and a roughness of 80 µm on the area where the feed is 0.15 mm / turn.

On fait varier progressivement l'avance pour obtenir une rugosité qui varie continuement le long d'une génératrice de la surface du cylindre.The advance is varied gradually to obtain a roughness which varies continuously along a generatrix of the surface of the cylinder.

Claims (11)

1.- Cylindre pour une machine de coulée continue de bandes métalliques minces, telle qu'une machine de coulée entre deux cylindres ou sur un cylindre, comportant au moins un cylindre (1, 21) dont la surface venant en contact avec le métal coulé présente une rugosité différente dans les zones extrêmales (4, 5) du cylindre (1, 21) voisines de ses extrémités latérales (2, 3) et dans la zone centrale (6) caractérisé en ce que la rugosité de la surface du cylindre (1, 21) varie de manière continue, le long d'une génératrice quelconque du cylindre. 1.- Cylinder for a continuous casting machine for thin metal strips, such as a casting machine between two cylinders or on a cylinder, comprising at least one cylinder (1, 21) whose surface coming into contact with the cast metal has a different roughness in the end zones (4, 5) of the cylinder (1, 21) near its lateral ends (2, 3) and in the central zone (6) characterized in that the roughness of the surface of the cylinder ( 1, 21) varies continuously, along any generatrix of the cylinder. 2.- Cylindre selon la revendication 1, caractérisé en ce que la rugosité des zones extrêmales (4, 5) est supérieure à la rugosité de la zone centrale (6). 2. A cylinder according to claim 1, characterized in that the roughness of the end zones (4, 5) is greater than the roughness of the central zone (6). 3.- Cylindre selon la revendication 2, caractérisé en ce que la rugosité Rz des zones extrêmales (4, 5) est comprise entre 50 et 300 µm. 3. A cylinder according to claim 2, characterized in that the roughness Rz of the end zones (4, 5) is between 50 and 300 µm. 4.- Cylindre selon la revendication 2, caractérisé en ce que la rugosité Rz de la zone centrale (6) est comprise entre 20 et 150 µm. 4. Cylinder according to claim 2, characterized in that the roughness Rz of the central zone (6) is between 20 and 150 µm. 5.- Procédé pour la réalisation d'un cylindre (1) selon l'une quelconque des revendications 1 et 2, caractérisé en ce qu'on réalise un galetage à pression variable de la surface dudit cylindre (1) pour obtenir la rugosité variable. 5.- Method for producing a cylinder (1) according to any one of claims 1 and 2, characterized in that a roller burnishing is carried out at variable pressure on the surface of said cylinder (1) to obtain the variable roughness . 6.- Procédé selon la revendication 5, caractérisé en ce que, avant d'effectuer le galetage, on usine de façon légèrement conique les zones extrêmales (9, 10) du cylindre de telle sorte qu'après galetage les génératrices de la surface externe dudit cylindre soient rectilignes. 6.- Method according to claim 5, characterized in that, before carrying out the burnishing, the end zones (9, 10) of the cylinder are machined in a slightly conical manner so that after burnishing the generatrices of the external surface of said cylinder are rectilinear. 7.- Procédé pour la réalisation d'un cylindre (21) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce qu'on réalise par usinage à la surface dudit cylindre (21) un sillon hélicoïdal (20) ayant pour axe, l'axe du cylindre. 7.- A method for producing a cylinder (21) according to any one of claims 1 or 2, characterized in that one realizes by machining on the surface of said cylinder (21) a helical groove (20) having for axis, the axis of the cylinder. 8.- Procédé selon la revendication 7, caractérisé en ce que le pas de l'hélice formée par le sillon et la profondeur du sillon (20) sont variables le long d'une génératrice du cylindre (21). 8.- Method according to claim 7, characterized in that the pitch of the propeller formed by the groove and the depth of the groove (20) are variable along a generatrix of the cylinder (21). 9.- Procédé selon la revendication 8, caractérisé en ce qu'au moins l'un des paramètres, pas de l'hélice ou profondeur du sillon (20), est plus grand dans les zones extrêmales du cylindre (21) situées au voisinage des extrémités latérales de celui-ci que dans la partie médiane. 9.- Method according to claim 8, characterized in that at least one of the parameters, not of the propeller or depth of the groove (20), is greater in the extreme zones of the cylinder (21) located in the vicinity lateral ends of it only in the middle part. 10.- Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce que le sillon (20) est obtenu par un usinage à avance variable. 10.- Method according to any one of claims 7 to 9, characterized in that the groove (20) is obtained by variable advance machining. 11.- Machine de coulée continue de bandes minces entre deux cylindres ou sur un cylindre comportant au moins un cylindre (1, 21) dont la surface vient en contact avec le métal coulé caractérisée en ce que le cylindre (1, 21) est un cylindre selon l'une quelconque des revendications 1 à 4. 11.- Continuous casting machine for thin strips between two cylinders or on a cylinder comprising at least one cylinder (1, 21), the surface of which comes into contact with the cast metal, characterized in that the cylinder (1, 21) is a cylinder according to any one of claims 1 to 4.
EP92403219A 1991-12-11 1992-11-27 Cylinder for a metal strip continuous casting machine, continous casting machine containing such a cylinder and process for making such a cylinder Expired - Lifetime EP0546885B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9115383 1991-12-11
FR9115383A FR2684904B1 (en) 1991-12-11 1991-12-11 CYLINDER FOR A CONTINUOUS CASTING MACHINE FOR METAL STRIPS, CORRESPONDING CONTINUOUS CASTING MACHINE AND METHOD FOR PRODUCING SUCH A CYLINDER.

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EP0546885A1 true EP0546885A1 (en) 1993-06-16
EP0546885B1 EP0546885B1 (en) 1997-08-13

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EP92403219A Expired - Lifetime EP0546885B1 (en) 1991-12-11 1992-11-27 Cylinder for a metal strip continuous casting machine, continous casting machine containing such a cylinder and process for making such a cylinder

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EP (1) EP0546885B1 (en)
JP (1) JP3181739B2 (en)
KR (1) KR100295519B1 (en)
AT (1) ATE156734T1 (en)
AU (1) AU658463B2 (en)
CA (1) CA2084232C (en)
DE (2) DE69221591T2 (en)
DK (1) DK0546885T3 (en)
ES (1) ES2106152T3 (en)
FR (1) FR2684904B1 (en)
GR (1) GR3024977T3 (en)
ZA (1) ZA929567B (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0740972A1 (en) * 1995-05-05 1996-11-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Casting steel strip
US8960264B2 (en) 2009-10-30 2015-02-24 Nucor Corporation Method and apparatus for controlling variable shell thickness in cast strip

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Publication number Priority date Publication date Assignee Title
ES2134427T5 (en) * 1993-11-18 2005-05-16 Castrip, Llc FOUNDING OF A STAINLESS STEEL BAND ON A DEFAULT RUGOSITY SURFACE.
AUPP040397A0 (en) * 1997-11-14 1997-12-11 Bhp Steel (Jla) Pty Limited Casting metal strip
KR100356176B1 (en) * 1998-12-21 2002-11-18 주식회사 포스코 Cooling roll for twin roll sheet casting machine
DE102005023745B4 (en) 2005-03-10 2022-02-10 Sms Group Gmbh Process for producing a continuous casting mold and continuous casting mold
CA2597100C (en) * 2005-03-10 2013-01-22 Sms Demag Ag Method for producing a continuous casting mold and corresponding continuous casting mold
JP4821199B2 (en) * 2005-07-12 2011-11-24 株式会社Ｉｈｉ Twin roll casting machine
KR101712005B1 (en) * 2014-04-24 2017-03-03 주식회사 오리온이엔씨 Method and system for in-situ on-line radiation monitoring in water
US20180179612A1 (en) * 2016-12-23 2018-06-28 Posco Duplex stainless steel sheet having excellent corrosion resistance and method for manufacturing the same
KR102257327B1 (en) * 2019-07-03 2021-05-31 한국원자력연구원 Device measuring radiation and method of measuring radioactive contamination using the same
KR102577739B1 (en) * 2023-02-06 2023-09-12 향상기업주식회사 Grooved metal plate, grooved metal pipe and manufacturing method thereof

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
EP0740972A1 (en) * 1995-05-05 1996-11-06 Ishikawajima-Harima Heavy Industries Co., Ltd. Casting steel strip
CN1063368C (en) * 1995-05-05 2001-03-21 石川岛播磨重工业株式会社 Method and appts. for casting steel strip
US8960264B2 (en) 2009-10-30 2015-02-24 Nucor Corporation Method and apparatus for controlling variable shell thickness in cast strip
US8960265B2 (en) 2009-10-30 2015-02-24 Nucor Corporation Method and apparatus for controlling variable shell thickness in cast strip
US9744589B2 (en) 2009-10-30 2017-08-29 Nucor Corporation Method and apparatus for controlling variable shell thickness in cast strip

Also Published As

Publication number Publication date
DE69221591T2 (en) 1998-01-22
ZA929567B (en) 1994-06-10
AU2992992A (en) 1993-06-17
DE4241775A1 (en) 1993-07-08
AU658463B2 (en) 1995-04-13
CA2084232C (en) 2003-02-25
KR100295519B1 (en) 2001-09-17
ATE156734T1 (en) 1997-08-15
JP3181739B2 (en) 2001-07-03
FR2684904A1 (en) 1993-06-18
DE69221591D1 (en) 1997-09-18
ES2106152T3 (en) 1997-11-01
CA2084232A1 (en) 1993-06-12
FR2684904B1 (en) 1994-03-18
DK0546885T3 (en) 1997-10-27
KR930012145A (en) 1993-07-20
EP0546885B1 (en) 1997-08-13
JPH05329585A (en) 1993-12-14
GR3024977T3 (en) 1998-01-30

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