EP0219443A2 - Roll for twin-roll continuous casting with cooling fluid circulation - Google Patents

Roll for twin-roll continuous casting with cooling fluid circulation Download PDF

Info

Publication number
EP0219443A2
EP0219443A2 EP86440077A EP86440077A EP0219443A2 EP 0219443 A2 EP0219443 A2 EP 0219443A2 EP 86440077 A EP86440077 A EP 86440077A EP 86440077 A EP86440077 A EP 86440077A EP 0219443 A2 EP0219443 A2 EP 0219443A2
Authority
EP
European Patent Office
Prior art keywords
cylinder according
envelope
grooves
pipes
circulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86440077A
Other languages
German (de)
French (fr)
Other versions
EP0219443A3 (en
EP0219443B1 (en
Inventor
Michel Larreco
Louis Vedda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT86440077T priority Critical patent/ATE41113T1/en
Publication of EP0219443A2 publication Critical patent/EP0219443A2/en
Publication of EP0219443A3 publication Critical patent/EP0219443A3/en
Application granted granted Critical
Publication of EP0219443B1 publication Critical patent/EP0219443B1/en
Expired legal-status Critical Current

Links

Images

Classifications

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

Definitions

  • the invention relates to the cooling of continuous casting cylinders between cylinders.
  • Cooled cylinders are known, for example from document FR-A-1567196, which shows a jacket surrounding the cylinder and crossed by numerous submerged axial pipes; US-A-3038219 showing axial circulation channels formed on the cylinder body, below the copper envelope which surrounds it; FR-A-1198006 showing circumferential channels housed in the cylinder body and covered by a copper hoop.
  • the object of the invention is to provide a cooled cylinder which does not have the aforementioned drawbacks, of a relatively simple construction, allowing more efficient cooling and not being subject to deformations detrimental to the quality of the cast product.
  • the invention provides a cylinder comprising a cylindrical body surrounded by an envelope; parallel cooling fluid circulation channels arranged circumferentially between the body and the casing; fluid inlet and outlet manifolds and fluid inlet and return pipes passing through the body and connecting the manifolds to the circulation channels.
  • This cylinder is characterized in that the channels consist of groups of grooves formed on the inner surface of the envelope, extending over arcs of circumferences organizing circulation in distinct and separate sectors, mounted in parallel hydraulically with each other, in that axial grooves are provided between the body and the casing at the two ends of each sector and into which open, on the one hand into their bottom, the supply and return pipes of the cooling fluid, and on the other laterally, the grooves of a group by one of their ends, and in that the coolant inlet and outlet manifolds are coaxial with each other and with the cylindrical body.
  • the machining of the circulation channels in the envelope is easy. Such a location of the channels also makes it possible to offer three heat exchange surfaces with the cooling water.
  • the width and spacing of the channels are easily calculated so as not to cause the envelope to collapse or swell. These deformations are all the less to be feared as the organization of the circumferential circulation into distinct sectors avoids reaching undesirable pressures (greater than 7 bars) which would cause a detachment of the copper.
  • a distribution in three angular sectors of 120 ° each is particularly advantageous.
  • a larger number increases the number of elbows and therefore increases the pressure losses, which makes it necessary to increase the inlet pressure.
  • a smaller number increases the length of the circuits in the circulation channels and therefore also the pressure drops.
  • the fact that the sectors are distinct, therefore independent of each other, allows a uniform circulation of the coolant over the entire periphery of the cylinder, for example in the direction opposite to that of its rotation. We will thus establish a "counter-current" circulation with the cast product, which is known to be more efficient than a "co-current" circulation in terms of heat exchange.
  • the preferred speed of water circulation is around 6 m / s.
  • a higher speed is not desirable, because it causes a significant increase in pressure drops.
  • the cooling cylinder is supplied with water through a double-flow rotating joint, specially designed to meet the specific specifications required, taking into account the vicinity of the molten metal: water flow (approximately 40 m / h) under low pressure and, to limit pressure losses, at the lowest possible speed (apart from the restriction of the circulation channels where the speed is approximately 6 m / s); low cylinder rotation speed (approx. 30 rpm).
  • Each cylinder of the invention is composed of a cooling drum 1 to which are fixed pins 2, 2 ′ rotating in bearings 3, 3 ′ with ball joints, mounted on a chassis not shown.
  • the pins 2, 2 ' are fixed by means of flanges 4, 4' enclosing the drum 1 and held together by fixing elements, or tie rods (bolts 5) passing through the drum 1.
  • the pin 2 is coupled in a conventional manner (eg universal joint) to rotation drive means / not shown.
  • the pin 2 ' connected by an intermediate fixing flange 8 to a device for supplying cooling water 9, is hollow to allow passage of the inlet 6 and outlet 7 coaxial manifolds to the drum 1.
  • the supply device 9 comprises a fixed pipe 10 for the water inlet and a fixed pipe 11 for the water outlet, inserted radially on a fixed casing 12.
  • a cylindrical sleeve 13, fixed to the flange 8, is secured in rotation of the pin 2 ', and turns in the casing 12 by means of the ball bearings 14.
  • the sleeve 13 has a blind central bore 6 'extending the manifold 6, and an annular chamber 7' surrounding the bore 6 ', extending the annular manifold 7.
  • Peripheral grooves facing each other, formed in the socket 13 and the casing 12, constitute two annular chambers 15 and 16 of the supply device, communicating respectively with the pipes 10 and 11.
  • Radial channels 17 make the bore 6 'communicate with the chamber 16 and therefore with the outlet 11.
  • the annular chamber 7 opens directly into the chamber 15 and can therefore communicate with the inlet 10.
  • the drum 1 consists of a cylindrical support body 19 made of steel, placed in a casing 20 of copper. crown flanges 21, laterally overlapping the body 19 and the envelope 20, are fixed to the body 19 and thus immobilize the envelope 20.
  • the body 19 has a central bore formed by two parts 22, 23, of different diameter.
  • the part 22, of smaller diameter comes in the extension of the outlet manifold 6 which advances to the interior of the drum and bears against a shoulder formed between the two parts 22, 23.
  • the part 23, of larger diameter surrounds the advanced end of the outlet manifold 6, and forms therewith and with the abovementioned shoulder, an annular chamber 24, into which the inlet manifold 7 opens out.
  • Part 22 and the journal 2 define a central chamber 25.
  • Pairs of radial supply 27 and return 26 pipes radiate from the inlet and outlet chambers 24 and respectively, and open into the grooves 28 and 28 ′, machined at the periphery of the body 19, parallel to its axis.
  • the water circulation is organized into three independent sectors I, II, III, of 120 ° each, mounted in parallel with each other hydraulically, and each comprising, in the direction of circulation of the water, a radial supply pipe 27, coming from the inlet manifold 7 and opening into the bottom of a first axial groove 28, said groove 28 distributing the cooling water in the parallel grooves 29, said grooves 29 laterally which open into a second axial groove 28 ', at an angular distance of approximately 120 ° from the first, said groove 28' which collects water towards the radial return pipe 26, and said return pipe 26 which supplies the outlet manifold 6.
  • the cooling water follows, from inlet 10 to outlet 11, a path indicated by the arrows. It can be seen, in particular in FIG. 2, that the water circulates in all the sectors in the same direction, trigonometric or antitrigonometric, determined so that, in the sectors in contact with the cast metal (sectors I, II to left in Figure 2), the circulation is ascending, that is to say opposite to the direction of movement of the cast product.
  • the full body 19 is made lighter by cavities 30 (only one has been shown in FIG. 2, but there may be several in each sector), which is taken advantage of by installing measuring devices (thermocouples, etc.). ) and / or data recording systems (in particular measurement) such as RAM, or receivers, etc., intended to be able to better follow the continuous casting process between cylinders.
  • the cylindrical body 19 may consist of a simple ferrule pressed against the inner periphery of the envelope 20.
  • the axial grooves 28 and 28 ′ have been provided in particular to allow the radial pipes 26 and 27 to be limited to two per sector.
  • the water inlets and outlets by single collectors such as 6 and 7, coaxial with each other and with the body cylindrical 19, allow, if necessary, to modify the number of sectors on a given cylinder, without too much difficulty, by means of usual machining and mounting operations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

Dans ce cylindre comprennant un corps cylindrique (19) entouré d'une enveloppe (20), les canaux de circulation de fluide de refroidissement disposés circonférentiellement entre le corps et l'enveloppe, sont constitués par des groupes de rainures (29) à la surface intérieure de l'enveloppe (20) s'étendant sur des arcs de circonférence, et organisant la circulation en secteurs angulaires (I, II, III) distincts, correspondant à chaque groupe. Des gorges axiales (28) sont ménagées entre le corps (19) et l'enveloppe (20) aux extrémités de chaque secteur, et dans lesquelles débouchent, d'une part, des canalisations radiales (26, 27) d'amenée et de retour du fluide, traversant ledit corps (19), et, d'autre part, les rainures (29) d'un groupe par l'une de leurs extrémités, lesdites gorges étant en nombre égal au double de celui des secteurs angulaires (I, II, III).

Figure imgaf001
In this cylinder comprising a cylindrical body (19) surrounded by an envelope (20), the coolant circulation channels arranged circumferentially between the body and the envelope, are constituted by groups of grooves (29) on the surface interior of the envelope (20) extending over arcs of circumference, and organizing circulation in angular sectors (I, II, III) distinct, corresponding to each group. Axial grooves (28) are formed between the body (19) and the casing (20) at the ends of each sector, and into which, on the one hand, there are radial pipes (26, 27) for supplying and return of the fluid, passing through said body (19), and, on the other hand, the grooves (29) of a group by one of their ends, said grooves being in number equal to twice that of the angular sectors (I , II, III).
Figure imgaf001

Description

L'invention concerne le refroidissement des cylindres de coulée continue entre cylindres.The invention relates to the cooling of continuous casting cylinders between cylinders.

La coulée continue entre cylindres de métaux, tels que l'acier ou l'aluminium, est connue, et peut être mise en oeuvre de diverses manières selon qu'on pratique une coulée verticale ou horizontale.Continuous casting between cylinders of metals, such as steel or aluminum, is known, and can be implemented in various ways depending on whether a vertical or horizontal casting is practiced.

Des cylindres refroidis sont connus, par exemple grâce au document FR-A-1567196, qui montre une chemise entourant le cylindre et traversée de nombreuses canalisations axiales noyées ; US-A-3038219 montrant des canaux axiaux de circulation pratiqués sur le corps de cylindre, en dessous de l'enveloppe de cuivre qui l'entoure ; FR-A-1198006 montrant des canaux circonférentiels logés dans le corps de cylindre et recouverts par une frette de cuivre.Cooled cylinders are known, for example from document FR-A-1567196, which shows a jacket surrounding the cylinder and crossed by numerous submerged axial pipes; US-A-3038219 showing axial circulation channels formed on the cylinder body, below the copper envelope which surrounds it; FR-A-1198006 showing circumferential channels housed in the cylinder body and covered by a copper hoop.

Pour diverses raisons, une circulation axiale de l'eau de refroidissement n'est pas satisfaisante (par exemple pour l'homogénéité dans le sens transversal du produit métallique coulé), et les enseignements des deux premiers documents cités sont d'ailleurs très schématiques et incomplets.For various reasons, an axial circulation of the cooling water is not satisfactory (for example for the homogeneity in the transverse direction of the cast metal product), and the lessons of the first two cited documents are moreover very schematic and incomplete.

L'enseignement du troisième document n'est guère plus satisfaisant, car la Solution présentée nécessite un usinage compliqué et coûteux du corps de cylindre. Par ailleurs, les échanges thermiques ne sont pas optimisés et,de plus, on constate sous la pression de l'eau dans les canaux circonférentiels, une tendance au gonflement et à la déformation de la frette, qui ne peut être palliée que par une augmentation coûteuse de l'épaisseur de cuivre de la frette.The teaching of the third document is hardly more satisfactory, because the solution presented requires complicated and costly machining of the cylinder body. Furthermore, the heat exchanges are not optimized and, moreover, there is under the pressure of the water in the circumferential channels, a tendency to swelling and to deformation of the hoop, which can only be offset by an increase. expensive copper thickness of the hoop.

Le but de l'invention est de proposer un cylindre refroidi ne présentant pas les inconvénients précités, d'une construction relativement simple, permettant un refroidissement plus efficace et n'étant pas sujet à des déformations préjudiciables à la qualité du produit coulé.The object of the invention is to provide a cooled cylinder which does not have the aforementioned drawbacks, of a relatively simple construction, allowing more efficient cooling and not being subject to deformations detrimental to the quality of the cast product.

Pour atteindre ce but, l'invention propose un cylindre comportant un corps cylindrique entouré d'une enveloppe ; des canaux parallèles de circulation de fluide de refroidissement disposés circonférentiellement entre le corps et l'enveloppe ; des collecteurs d'entrée et de sortie du fluide et des canalisations d'amenée et de retour du fluide traversant le corps et reliant les collecteurs aux canaux de circulation. Ce cylindre se caractérise en ce que les canaux sont constitués par des groupes de rainures ménagées à la surface intérieure de l'enveloppe, s'étendant sur des arcs de circonférences organisant la circulation en secteurs distincts et séparés, montés en parallèle entre eux hydrauliquement, en ce que des gorges axiales sont ménagées entre le corps et l'enveloppe aux deux extrémités de chaque secteur et dans lesquelles débouchent, d'une part dans leur fond, les canalisations d'amenée et de retour du fluide refroidissant, et d'autre part latéralement, les rainures d'un groupe par l'une de leurs extrémités, et en ce que les collecteurs d'entrée et de sortie du fluide de refroidissement sont coaxiaux entre eux et avec le corps cylindrique.To achieve this object, the invention provides a cylinder comprising a cylindrical body surrounded by an envelope; parallel cooling fluid circulation channels arranged circumferentially between the body and the casing; fluid inlet and outlet manifolds and fluid inlet and return pipes passing through the body and connecting the manifolds to the circulation channels. This cylinder is characterized in that the channels consist of groups of grooves formed on the inner surface of the envelope, extending over arcs of circumferences organizing circulation in distinct and separate sectors, mounted in parallel hydraulically with each other, in that axial grooves are provided between the body and the casing at the two ends of each sector and into which open, on the one hand into their bottom, the supply and return pipes of the cooling fluid, and on the other laterally, the grooves of a group by one of their ends, and in that the coolant inlet and outlet manifolds are coaxial with each other and with the cylindrical body.

L'usinage des canaux de circulation dans l'enveloppe (en cuivre ou alliage de cuivre) est aisée . Une telle localisation des canaux permet, par ailleurs, d'offrir trois surfaces d'échange thermique avec l'eau de refroidissement. La largeur et l'espacement des canaux sont calculés aisément pour ne pas provoquer d'affaissement ou de gonflement de l'enveloppe. Ces déformations sont d'autant moins à craindre que l'organisation de la circulation circonférentielle en secteurs distincts évite d'atteindre des pressions indésirables (supérieures à 7 bars) qui entraîneraient un décollement du cuivre.The machining of the circulation channels in the envelope (made of copper or copper alloy) is easy. Such a location of the channels also makes it possible to offer three heat exchange surfaces with the cooling water. The width and spacing of the channels are easily calculated so as not to cause the envelope to collapse or swell. These deformations are all the less to be feared as the organization of the circumferential circulation into distinct sectors avoids reaching undesirable pressures (greater than 7 bars) which would cause a detachment of the copper.

Une répartition en trois secteurs angulaires de 120° chacun est particulièrement avantageuse. Un nombre plus important augmente le nombre de coudes et élève donc les pertes de charge , ce qui oblige à augmenter la pression d'entrée. Un nombre plus réduit augmente la longueur des circuits dans les canaux de circulation et donc aussi les pertes de charge . Le fait que les secteurs sont distincts, donc indépendants les uns des autres, permet une circulation du fluide de refroidissement uniforme sur toute la périphérie du cylindre, par exemple dans le sens opposé à celui de sa rotation. On établiera ainsi une circulation à "contre-courant" avec le produit coulé, que l'on sait plus efficace qu'une circulation à "co-courant" sur le plan de l'échange thermique.A distribution in three angular sectors of 120 ° each is particularly advantageous. A larger number increases the number of elbows and therefore increases the pressure losses, which makes it necessary to increase the inlet pressure. A smaller number increases the length of the circuits in the circulation channels and therefore also the pressure drops. The fact that the sectors are distinct, therefore independent of each other, allows a uniform circulation of the coolant over the entire periphery of the cylinder, for example in the direction opposite to that of its rotation. We will thus establish a "counter-current" circulation with the cast product, which is known to be more efficient than a "co-current" circulation in terms of heat exchange.

La vitesse préférée de circulation d'eau est de l'ordre de 6 m/s.The preferred speed of water circulation is around 6 m / s.

Une vitesse supérieure n'est pas souhaitable, car elle provoque une augmentation sensible des pertes de charge.A higher speed is not desirable, because it causes a significant increase in pressure drops.

Une vitesse inférieure amène, au lieu d'un transfert de chaleur par convection forcée sans formation de vapeur :

  • - soit un transfert en ébullition nuclée, c.à.d. la formation de fines bulles de vapeur à la surface, qui se recon- densent dans le liquide environnant. L'accumulation de ces bulles constitue un véritable "bouchon de vapeur" dans le circuit et bloque le passage de l'eau. On sait qu'en lingotière de coulée continue classique, le sens de passage de l'eau de refroidissement est remontant, du bas vers le haut, pour que la vapeur monte naturellement avec l'eau, sans opposition. La circulation de l'eau de refroidissement dans les secteurs séparés des cylindres selon l'invention est organisée pour reproduire cette même condition ;
  • - soit un transfert en ébullition franche, c.à.d. la formation d'un film de vapeur plus ou moins stable sur la surface à refroidir. Ce film, véritable résistance thermique, s'oppose à l'extraction de la chaleur, la température s'élève et le cuivre peut alors "brûler" en surface au contact de l'acier.
A lower speed leads, instead of a heat transfer by forced convection without vapor formation:
  • - or a transfer in nucleated boiling, i.e. the formation of fine vapor bubbles on the surface, which are condensed in the surrounding liquid. The accumulation of these bubbles constitutes a veritable "vapor plug" in the circuit and blocks the passage of water. It is known that in a conventional continuous casting mold, the direction of passage of the cooling water is rising, from the bottom to the top, so that the vapor rises naturally with the water, without opposition. The circulation of cooling water in the separate sectors of the cylinders according to the invention is organized to reproduce this same condition;
  • - or a transfer in full boiling, i.e. the formation of a more or less stable vapor film on the surface to be cooled. This film, a real thermal resistance, opposes the extraction of heat, the temperature rises and the copper can then "burn" on the surface in contact with the steel.

De plus, une circulation rapide limite les dépôts de calcaire ou de sels divers, inévitables malgré l'utilisation d'une eau traitée.In addition, rapid circulation limits deposits of limestone or various salts, which are inevitable despite the use of treated water.

L'alimentation du cylindre de refroidissement en eau se fait au travers d'un joint tournant à double flux, spécialement conçu pour répondre aux spécifications particulières exigées, compte tenu du voisinage du métal en fusion : débit d'eau (environ 40 m'/h) sous faible pression et, pour limiter les pertes de charge , à la plus faible vitesse possible (en dehors de la restriction des canaux de circulation où la vitesse est d'environ 6 m/s) ; faible vitesse de rotation du cylindre (environ 30 trs/mn).The cooling cylinder is supplied with water through a double-flow rotating joint, specially designed to meet the specific specifications required, taking into account the vicinity of the molten metal: water flow (approximately 40 m / h) under low pressure and, to limit pressure losses, at the lowest possible speed (apart from the restriction of the circulation channels where the speed is approximately 6 m / s); low cylinder rotation speed (approx. 30 rpm).

D'autres caractéristiques et avantages de l'invention ressortiront de la description ci-après d'un mode préféré de réalisation. Il sera fait référence aux dessins annexés sur lesquels :

  • - la figure 1 est une vue en coupe axiale d'un cylindre et de son dispositif d'alimentation en eau de refroidissement ;
  • - la figure 2 est une coupe transversale schématique II-II du cylindre de la figure 1.
Other characteristics and advantages of the invention will emerge from the description below of a preferred embodiment. Reference will be made to the appended drawings in which:
  • - Figure 1 is an axial sectional view of a cylinder and its cooling water supply device;
  • - Figure 2 is a schematic cross section II-II of the cylinder of Figure 1.

Chaque cylindre de l'invention est composé d'un tambour de refroidissement 1 auquel sont fixés des tourillons 2, 2' tournant dans des paliers 3, 3' à rotule, montés sur un châssis non représenté.Each cylinder of the invention is composed of a cooling drum 1 to which are fixed pins 2, 2 ′ rotating in bearings 3, 3 ′ with ball joints, mounted on a chassis not shown.

Les tourillons 2, 2' sont fixés grâce à des brides 4, 4' enserrant le tambour 1 et maintenues entre elles par des éléments de fixation,ou tirants,(boulons 5) traversant le tambour 1.The pins 2, 2 'are fixed by means of flanges 4, 4' enclosing the drum 1 and held together by fixing elements, or tie rods (bolts 5) passing through the drum 1.

Le tourillon 2 est accouplé d'une manière conventionnelle (e.g. joint de cardan) à des moyens d'entraînement en rotation/non représentés.The pin 2 is coupled in a conventional manner (eg universal joint) to rotation drive means / not shown.

Le tourillon 2', connecté par une bride intermédiaire de fixation 8 à un dispositif d'alimentation 9 en eau de refroidissement, est creux pour laisser le passage des collecteurs d'entrée 6 et de sortie 7 coaxiaux au tambour 1.The pin 2 ', connected by an intermediate fixing flange 8 to a device for supplying cooling water 9, is hollow to allow passage of the inlet 6 and outlet 7 coaxial manifolds to the drum 1.

Le dispositif d'alimentation 9 comporte une conduite fixe 10 d'arrivée d'eau et une conduite fixe 11 de sortie d'eau, piquées radialement sur un carter fixe 12. Une douille cylindrique 13, fixée à la bride 8, est solidaire en rotation du tourillon 2', et tourne dans le carter 12 grâce aux roulements à billes 14.The supply device 9 comprises a fixed pipe 10 for the water inlet and a fixed pipe 11 for the water outlet, inserted radially on a fixed casing 12. A cylindrical sleeve 13, fixed to the flange 8, is secured in rotation of the pin 2 ', and turns in the casing 12 by means of the ball bearings 14.

La douille 13 comporte un alésage central borgne 6' prolongeant le collecteur 6, et une chambre annulaire 7' entourant l'alésage 6', prolongeant le collecteur annulaire 7.The sleeve 13 has a blind central bore 6 'extending the manifold 6, and an annular chamber 7' surrounding the bore 6 ', extending the annular manifold 7.

Des rainures périphériques se faisant face, formées dans la douille 13 et le carter 12, constituent deux chambres annulaires 15 et 16 du dispositif d'alimentation, communiquant respectivement avec les conduites 10 et 11.Peripheral grooves facing each other, formed in the socket 13 and the casing 12, constitute two annular chambers 15 and 16 of the supply device, communicating respectively with the pipes 10 and 11.

Des canaux radiaux 17 font communiquer l'alésage 6' avec la chambre 16 et donc avec la sortie 11.Radial channels 17 make the bore 6 'communicate with the chamber 16 and therefore with the outlet 11.

La chambre annulaire 7' débouche directement dans la chambre 15 et peut donc communiquer avec l'entrée 10.The annular chamber 7 'opens directly into the chamber 15 and can therefore communicate with the inlet 10.

Des étanchéités adéquates 18 complètent ce joint tournant.Adequate seals 18 complete this rotating joint.

Le tambour 1 se compose d'un corps-support 19 cylindrique en acier, placé dans une enveloppe 20 de cuivre. flasques-couronnes 21, chevauchant latéralement le corps 19 et l'enveloppe 20, sont fixés sur le corps 19 et immobilisent ainsi l'enveloppe 20.The drum 1 consists of a cylindrical support body 19 made of steel, placed in a casing 20 of copper. crown flanges 21, laterally overlapping the body 19 and the envelope 20, are fixed to the body 19 and thus immobilize the envelope 20.

Le corps 19 comporte un alésage central formé de deux parties 22, 23, de diamètre différent. La partie 22, de plus petit diamètre, vient dans le prolongement du collecteur de sortie 6 qui s'avance jusqu'à l'intérieur du tambour et s'appuie contre un épaulement formé entre les deux parties 22, 23. La partie 23, de plus grand diamètre, entoure l'extrémité avancée du collecteur de sortie 6, et forme avec celui-ci et avec l'épaulement précité, une chambre annulaire 24, dans laquelle débouche le collecteur d'entrée 7. La partie 22 et le tourillon 2 délimitent une chambre centrale 25.The body 19 has a central bore formed by two parts 22, 23, of different diameter. The part 22, of smaller diameter, comes in the extension of the outlet manifold 6 which advances to the interior of the drum and bears against a shoulder formed between the two parts 22, 23. The part 23, of larger diameter, surrounds the advanced end of the outlet manifold 6, and forms therewith and with the abovementioned shoulder, an annular chamber 24, into which the inlet manifold 7 opens out. Part 22 and the journal 2 define a central chamber 25.

Des paires de canalisations radiales d'amenée 27 et de retour 26, rayonnent à partir des chambres d'entrée 24 et de sortie respectivement, et débouchent en fond des gorges 28 et 28', usinées à la périphérie du corps 19, parallèlement à son axe.Pairs of radial supply 27 and return 26 pipes radiate from the inlet and outlet chambers 24 and respectively, and open into the grooves 28 and 28 ′, machined at the periphery of the body 19, parallel to its axis.

Des rainures parallèles 29, de préférence à section rectangulaire pour les raisons de simplicité, et s'étendant en arcs de cercle, sont usinées sur la surface interne de l'enveloppe en cuivre 20 et constituent des canaux qui relient une gorge axiale 28 par laquelle l'eau entre, à la gorge axiale 28'suivante, par laquelle l'eau sort.Parallel grooves 29, preferably rectangular in section for the sake of simplicity, and extending in arcs of a circle, are machined on the internal surface of the copper casing 20 and constitute channels which connect an axial groove 28 through which the water enters, at the following axial groove 28 ′, through which the water leaves.

Comme cela ressort bien de la figure 2, la circulation d'eau est organisé en trois secteurs indépendants I, II, III, de 120° chacun, montés en parallèle entre eux hydrauliquement, et comprennant chacun, dans le sens de circulation de l'eau, une canalisation radiale d'amenée 27, issue du collecteur d'entrée 7 et débouchant dans le fond d'une première gorge axiale 28, ladite gorge 28 répartissant l'eau de refroidissement dans les rainures parallèles 29, lesdites rainures 29 latéralment qui débouchent ans une seconde gorge axiale 28', à une distance angulaire de 120° environ de la première, ladite gorge 28' qui collecte l'eau vers la canalisation radiale de retour 26, et ladite canalisation de retour 26 qui alimente le collecteur de sortie 6.As is clear from FIG. 2, the water circulation is organized into three independent sectors I, II, III, of 120 ° each, mounted in parallel with each other hydraulically, and each comprising, in the direction of circulation of the water, a radial supply pipe 27, coming from the inlet manifold 7 and opening into the bottom of a first axial groove 28, said groove 28 distributing the cooling water in the parallel grooves 29, said grooves 29 laterally which open into a second axial groove 28 ', at an angular distance of approximately 120 ° from the first, said groove 28' which collects water towards the radial return pipe 26, and said return pipe 26 which supplies the outlet manifold 6.

L'eau de refroidissement suit, depuis l'entrée 10 jusqu'à la sortie 11, un trajet indiqué par les flèches. On voit, notamment sur la figure 2, que l'eau circule dans tous les secteurs dans le même sens, trigonométrique ou antitrigonomé- trique, déterminé de manière que, dans les secteurs en contact avec le métal coulé (les secteurs I, II à gauche sur la figure 2), la circulation soit ascendante, c'est-à-dire à l'opposé du sens de déplacement du produit coulé.The cooling water follows, from inlet 10 to outlet 11, a path indicated by the arrows. It can be seen, in particular in FIG. 2, that the water circulates in all the sectors in the same direction, trigonometric or antitrigonometric, determined so that, in the sectors in contact with the cast metal (sectors I, II to left in Figure 2), the circulation is ascending, that is to say opposite to the direction of movement of the cast product.

Le corps plein 19 est allégé par des cavités 30 (une seule a été représentée sur la figure 2, mais il peut y en avoir plusieurs dans chaque secteur), dont on tire profit en y implantant des appareils de mesures (thermocouples, ...) et/ou des systèmes d'enregistrement de données (notamment de mesure) tels que des mémoires vives, ou bien des récepteurs, etc., destinés à pouvoir mieux suivre le processus de coulée continue entre cylindres.The full body 19 is made lighter by cavities 30 (only one has been shown in FIG. 2, but there may be several in each sector), which is taken advantage of by installing measuring devices (thermocouples, etc.). ) and / or data recording systems (in particular measurement) such as RAM, or receivers, etc., intended to be able to better follow the continuous casting process between cylinders.

Pour réduire encore l'inertie, le corps cylindrique 19 peut être constitué d'une simple virole plaquée contre la périphérie intérieure de l'enveloppe 20. Dans ce cas, ce sont les canalisations d'amenée de l'eau aux rainures et de retour qui, réalisées par des conduites apparentes, assurent la rigidité mécanique de l'ensemble, à la manière des rayons d'une roue dont la jante serait formée par la virole et l'enveloppe réunies.To further reduce the inertia, the cylindrical body 19 may consist of a simple ferrule pressed against the inner periphery of the envelope 20. In this case, these are the pipes for bringing water to the grooves and for returning which, carried out by visible pipes, ensure the mechanical rigidity of the assembly, in the manner of the spokes of a wheel whose rim is formed by the ferrule and the envelope combined.

Par ailleurs, comme on l'aura compris, les gorges axiales 28 et 28' ont été prévues notamment pour permettre de limiter les canalisations radiales 26 et 27 à deux par secteur.Furthermore, as will be understood, the axial grooves 28 and 28 ′ have been provided in particular to allow the radial pipes 26 and 27 to be limited to two per sector.

De même, les entrées et sortie d'eau par des collecteurs uniques tels que 6 et 7, coaxiaux entre eux et avec le corps cylindrique 19, permettent, au besoin, de modifier le nombre de secteurs sur un cylindre donné, sans trop de difficultés, au moyen d'opérations d'usinage et de montage habituelles.Likewise, the water inlets and outlets by single collectors such as 6 and 7, coaxial with each other and with the body cylindrical 19, allow, if necessary, to modify the number of sectors on a given cylinder, without too much difficulty, by means of usual machining and mounting operations.

Claims (10)

1. Cylindre pour installation de coulée continue entre cylindres, du type comprenant un corps cylindrique entouré d'une enveloppe, des canaux parallèles de circulation de fluide de refroidissement, disposés circonférentiellement entre lε corps et l'enveloppe, des collecteurs d'entrée et de sortie du fluide, et des canalisations d'amenée et de retour du fluide traversant ledit corps et reliant les collecteurs aux canaux ; caractérisé en ce que lesdits canaux circonférentiels sont constitués par des groupes de rainures (29) à la surface intérieure de l'enveloppe (20), s'étendant sur des arcs de circonférences, et organisant la circulation en secteurs (I, II, III) distincts correspondant à chaque groupe ; en ce que lesdits collecteurs (6, 7) sont coaxiaux au corps cylindrique (19) ; en ce que des gorges axiales (28) sont ménagées entre le corps (19) et l'enveloppe (20) aux extrémités de chaque secteur (I, II, III) et dans lesquelles débouchent, d'une part, les canalisations d'amenée et de retour (26, 27) traversant ledit corps (19) et, d'autre part, les rainures (29) d'un groupe, par l'une de leurs extrémités.1. Cylinder for continuous casting installation between cylinders, of the type comprising a cylindrical body surrounded by an envelope, parallel channels for cooling fluid circulation, arranged circumferentially between the body and the envelope, inlet and fluid outlet, and fluid inlet and return pipes passing through said body and connecting the collectors to the channels; characterized in that said circumferential channels consist of groups of grooves (29) on the inner surface of the envelope (20), extending over arcs of circumferences, and organizing circulation in sectors (I, II, III ) separate corresponding to each group; in that said manifolds (6, 7) are coaxial with the cylindrical body (19); in that axial grooves (28) are formed between the body (19) and the casing (20) at the ends of each sector (I, II, III) and into which, on the one hand, the pipes of brought and back (26, 27) passing through said body (19) and, on the other hand, the grooves (29) of a group, by one of their ends. 2. Cylindre selon la revendication 1, caractérisé en ce qu'il est prévu trois secteurs (I, II, III) de circulation, de 120° chacun.2. Cylinder according to claim 1, characterized in that there are provided three sectors (I, II, III) of circulation, of 120 ° each. 3. Cylindre selon la revendication 1, caractérisé en ce que le corps (19) est en acier et l'enveloppe (20) en cuivre ou en alliage de cuivre.3. Cylinder according to claim 1, characterized in that the body (19) is made of steel and the casing (20) is made of copper or a copper alloy. 4. Cylindre selon les revendications 1 ou 3, caractérisé en ce que l'enveloppe (20) est maintenue sur le corps (19) par des flasques-couronnes (21) latéraux.4. Cylinder according to claims 1 or 3, characterized in that the envelope (20) is held on the body (19) by side flanges (21). 5. Cylindre selon les revendications 1, 3 ou 4, caractérisé en ce qu'il est pourvu de tourillons (2, 2') fixés latéralement sur le corps (19) par des éléments de serrage (5).5. Cylinder according to claims 1, 3 or 4, characterized in that it is provided with pins (2, 2 ') fixed laterally on the body (19) by clamping elements (5). 6. Cylindre selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'il est associé à un dispositif (9) à joint tournant d'alimentation en fluide de refroidissement.6. Cylinder according to any one of claims 1 to 5, characterized in that it is associated with a device (9) with rotary joint for supplying cooling fluid. 7. Cylindre selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le corps (19) comporte des cavités (30) permettant de loger des appareils de mesure et d'enregistrement.7. Cylinder according to any one of the claims 1 to 6, characterized in that the body (19) has cavities (30) for housing measurement and recording devices. 8. Cylindre selon la revendication 1, caractérisé en ce que lesdites gorges axiales (28) sont usinées à la périphérie du corps (19).8. Cylinder according to claim 1, characterized in that said axial grooves (28) are machined at the periphery of the body (19). 9. Cylindre selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps cylindrique (19) est un corps plein foré radialement pour y ménager les canalisations (26, 27) d'amenée et de retour du fluide de refroidissement.9. Cylinder according to any one of the preceding claims, characterized in that the cylindrical body (19) is a solid body drilled radially to provide the pipes (26, 27) for supplying and returning the cooling fluid. 10. Cylindre selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les canalisations (26 et 27) d'ame - née et de retour du fluide de refroidissement, sont des conduites apparentes, le corps cylindrique (19) étant constitué d'une simple virole plaquée intérieurement contre l'enveloppe (20).10. Cylinder according to any one of claims 1 to 8, characterized in that the pipes (26 and 27) of core - born and return of the cooling fluid, are visible pipes, the cylindrical body (19) being consisting of a simple ferrule pressed internally against the envelope (20).
EP86440077A 1985-09-17 1986-09-12 Roll for twin-roll continuous casting with cooling fluid circulation Expired EP0219443B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86440077T ATE41113T1 (en) 1985-09-17 1986-09-12 CASTING ROLLER FOR CONTINUOUS CASTING BETWEEN CASTING ROLLERS WITH A COOLING LIQUID FLOW.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8513776A FR2587247B1 (en) 1985-09-17 1985-09-17 CYLINDER FOR CONTINUOUS CASTING BETWEEN CYLINDERS, WITH COOLING FLUID CIRCULATION
FR8513776 1985-09-17

Publications (3)

Publication Number Publication Date
EP0219443A2 true EP0219443A2 (en) 1987-04-22
EP0219443A3 EP0219443A3 (en) 1987-05-06
EP0219443B1 EP0219443B1 (en) 1989-03-08

Family

ID=9322984

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86440077A Expired EP0219443B1 (en) 1985-09-17 1986-09-12 Roll for twin-roll continuous casting with cooling fluid circulation

Country Status (8)

Country Link
US (1) US4671340A (en)
EP (1) EP0219443B1 (en)
JP (1) JPS62110852A (en)
AT (1) ATE41113T1 (en)
CA (1) CA1282936C (en)
DE (1) DE3662236D1 (en)
FR (1) FR2587247B1 (en)
IT (1) IT1197148B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0680795A1 (en) * 1994-05-02 1995-11-08 Siemens Aktiengesellschaft In roll pins supported roll for a continuous casting installation producing metal strips
EP0694356A1 (en) * 1994-07-29 1996-01-31 Pechiney Rhenalu Method and apparatus for correcting the crown of the rolls in continuous casting of metal strips
WO2001024958A1 (en) * 1999-10-06 2001-04-12 Pechiney Rhenalu Continuous casting roll for metal strip comprising a cooling circuit
CN1072057C (en) * 1997-05-02 2001-10-03 沃斯特－阿尔派因工业设备制造有限公司 Casting roll

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842040A (en) * 1988-08-10 1989-06-27 Battelle Development Corporation Uniform cooling of cast strip
US5626183A (en) * 1989-07-14 1997-05-06 Fata Hunter, Inc. System for a crown control roll casting machine
ES2083982T3 (en) * 1989-07-14 1996-05-01 Hunter Eng Co REGULATION OF THE FLEXION IN A CASTING MACHINE BETWEEN ROLLERS.
DE4026075A1 (en) * 1990-08-17 1992-02-20 Sundwiger Eisen Maschinen CASTING WHEEL, ESPECIALLY FOR A ROLLING CASTING MACHINE
US5411075A (en) * 1993-08-31 1995-05-02 Aluminum Company Of America Roll for use in casting metal products and an associated method
AUPN053695A0 (en) * 1995-01-13 1995-02-09 Bhp Steel (Jla) Pty Limited Casting roll
IT1276656B1 (en) * 1995-04-03 1997-11-03 Innocenti Eng Spa ROLLER FOR CONTINUOUS CASTING MOLD WITH COUNTER-ROTATING ROLLERS FOR THIN THICKNESS
JP3177401B2 (en) * 1995-04-12 2001-06-18 富士重工業株式会社 Apparatus for removing paint film from painted resin products
AUPN811396A0 (en) * 1996-02-16 1996-03-07 Bhp Steel (Jla) Pty Limited Roll cooling structure for twin roll continuous caster
AUPO188696A0 (en) * 1996-08-27 1996-09-19 Bhp Steel (Jla) Pty Limited Twin roll casting
IT1316320B1 (en) * 2000-02-01 2003-04-10 Ohg Bruno Presezzi S R L CONTINUOUS CASTING ROLLER, ESPECIALLY FOR THE PRODUCTION OF ALUMINUM OR ALUMINUM ALLOY TAPES.
JP2007196260A (en) * 2006-01-26 2007-08-09 Ishikawajima Harima Heavy Ind Co Ltd Twin roll casting machine
EP1844880A1 (en) * 2006-04-12 2007-10-17 So & So Sommerhofer OEG Strip casting
CN103269813B (en) * 2010-10-18 2015-07-29 卡斯特里普公司 Double-roller continuous casting machine
RU2553139C2 (en) * 2012-07-04 2015-06-10 Актиеболагет Скф Distributor, roller line and device for continuous casting
RU2553140C2 (en) * 2012-07-04 2015-06-10 Актиеболагет Скф Distributor, roller line and device for continuous casting
CN109681706A (en) * 2018-12-21 2019-04-26 江苏甬金金属科技有限公司 A kind of closed type fiber roller rotary joint
CN114406215A (en) * 2021-12-15 2022-04-29 钢铁研究总院 A vacuum rapid quenching cooling system using liquid metal for forced cooling
CN116099995B (en) * 2023-02-27 2024-11-01 中国重型机械研究院股份公司 Sector-section three-section driving roller for casting stainless steel slab, cooling system and method

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1675274A (en) * 1921-08-15 1928-06-26 Barrett Co Drum cooler or drier
US1651502A (en) * 1926-06-15 1927-12-06 Farrel Birmingham Co Inc Heat-exchange roll
US1892028A (en) * 1928-04-06 1932-12-27 Sterling W Alderfer Method and apparatus for cooling mill rolls
US2671278A (en) * 1949-11-23 1954-03-09 Maurice G Hinnekens Steam heated cylinder
FR1046908A (en) * 1951-10-29 1953-12-09 Lancement D Outil Soc D Further training in cold rolling mill rolls and their cooling devices
GB761337A (en) * 1953-12-15 1956-11-14 Armstrong Cork Co Improvements in or relating to a heat exchange roll
GB1124966A (en) * 1965-11-11 1968-08-21 Wiggins Teape Res Dev Improvements in or relating to hollow heat exchange cylinders
FR2217098A1 (en) * 1973-02-13 1974-09-06 Scal Gp Condit Aluminium Continuous casting appts of improved output capacity - by lining surfaces in contact with liq metal with a highly heat conductive material eg copper (alloys)
FR2314788A1 (en) * 1975-06-17 1977-01-14 Fives Cail Babcock INTERNAL COOLED TYPE ROLLERS IMPROVEMENTS
GB2046386B (en) * 1979-04-12 1983-02-23 Aeroquip Ltd Liquid-tight rotary pipe joint
JPS5617169A (en) * 1979-07-24 1981-02-18 Mitsubishi Heavy Ind Ltd Cooled rolling roll of direct rolling type continuous casting machine
US4307771A (en) * 1980-01-25 1981-12-29 Allied Corporation Forced-convection-cooled casting wheel
US4537289A (en) * 1982-06-18 1985-08-27 International Telephone And Telegraph Corporation Dust boot for a disc-brake actuating cylinder-and-piston unit
US4489772A (en) * 1982-09-27 1984-12-25 Wirtz Manufacturing Company, Inc. Drum for continuous casting machine
US4502528A (en) * 1983-04-04 1985-03-05 Allied Corporation Chilled casting wheel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0680795A1 (en) * 1994-05-02 1995-11-08 Siemens Aktiengesellschaft In roll pins supported roll for a continuous casting installation producing metal strips
EP0694356A1 (en) * 1994-07-29 1996-01-31 Pechiney Rhenalu Method and apparatus for correcting the crown of the rolls in continuous casting of metal strips
FR2723014A1 (en) * 1994-07-29 1996-02-02 Pechiney Rhenalu METHOD AND DEVICE FOR CORRECTING THE OVALIZATION OF CONTINUOUS CASTING CYLINDERS OF METAL STRIP
CN1072057C (en) * 1997-05-02 2001-10-03 沃斯特－阿尔派因工业设备制造有限公司 Casting roll
WO2001024958A1 (en) * 1999-10-06 2001-04-12 Pechiney Rhenalu Continuous casting roll for metal strip comprising a cooling circuit
FR2799399A1 (en) * 1999-10-06 2001-04-13 Pechiney Rhenalu METAL BAND CONTINUOUS CASTING CYLINDER COMPRISING A COOLING CIRCUIT
AP1403A (en) * 1999-10-06 2004-04-29 Pechiney Rhenalu Continuous casting roll for metal strip comprising a cooling circuit.

Also Published As

Publication number Publication date
CA1282936C (en) 1991-04-16
FR2587247B1 (en) 1988-08-12
IT8621574A0 (en) 1986-09-02
IT8621574A1 (en) 1988-03-02
DE3662236D1 (en) 1989-04-13
EP0219443A3 (en) 1987-05-06
FR2587247A1 (en) 1987-03-20
IT1197148B (en) 1988-11-25
US4671340A (en) 1987-06-09
EP0219443B1 (en) 1989-03-08
ATE41113T1 (en) 1989-03-15
JPS62110852A (en) 1987-05-21

Similar Documents

Publication Publication Date Title
EP0219443B1 (en) Roll for twin-roll continuous casting with cooling fluid circulation
CA2030071C (en) Roll for continuous casting device on one or between two rolls
EP2714303A1 (en) Method for manufacturing a metal foam provided with channels and resulting metal foam
KR100229977B1 (en) Cooling roll
WO2018024765A1 (en) Plate heat exchanger module for which the channels integrate as input a uniform flow distribution zone and a fluid bifurcation zone
FR2758282A1 (en) CYLINDER FOR A ROLLING OR CONTINUOUS CASTING INSTALLATION OF METALS
EP1393904B1 (en) Rotary press for applying a pattern on a web like substrate
EP1218128B1 (en) Continuous casting roll for metal strip comprising a cooling circuit
CA2134286C (en) Casting cylinder for a continuous casting installation on one or between two cylinders
EP0792706B1 (en) Casting cylinder of continuous casting apparatus with one or two cylinders
EP0022025B1 (en) Heat exchanger with double envelope
EP0890065B1 (en) Refrigeration capacity accumulator
EP3540359B1 (en) Heat conduction device and associated heat dissipation system
JPS5956950A (en) Continuous casting method for metal plates
CA1165090A (en) Tubular roll for continuous casting machine
FR2763204A1 (en) HEAT EXCHANGER FOR ELECTRONIC COMPONENTS AND ELECTROTECHNICAL APPARATUS
FR2539051A1 (en) THERMAL TREATMENT DEVICE WITH A SCRAPED SURFACE INCORPORATING A DOUBLE WALL
FR3084699A1 (en) HEAT EXCHANGER FOR A TURBOMACHINE AND MANUFACTURING METHOD THEREOF
EP3830401B1 (en) Heat exchanger for turbomachine
EP0462903A1 (en) Tube-like heat-exchanger for hot and cold fluids, with great differences of temperature and pressure
FR2506443A3 (en) Conical element for heat exchanger - has exterior shaped to eliminate processed product ejection from heat exchanger
FR2846406A1 (en) Heat exchanger includes central parallelepiped body with two opposed ends covered by convex housings soldered to body, with deformation formed in convex wall near to connection zone
JPS5913552A (en) Continuous casting method of steel plate
BE699194A (en)
BE358816A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE GB LI LU SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE GB LI LU SE

17P Request for examination filed

Effective date: 19871021

17Q First examination report despatched

Effective date: 19880706

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB LI LU SE

REF Corresponds to:

Ref document number: 41113

Country of ref document: AT

Date of ref document: 19890315

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3662236

Country of ref document: DE

Date of ref document: 19890413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19890930

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19911015

Year of fee payment: 6

EPTA Lu: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19920821

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920917

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19920923

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19920924

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921001

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19921016

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19930912

Ref country code: AT

Effective date: 19930912

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19930913

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930930

Ref country code: CH

Effective date: 19930930

Ref country code: BE

Effective date: 19930930

BERE Be: lapsed

Owner name: INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE

Effective date: 19930930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19930912

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940601

EUG Se: european patent has lapsed

Ref document number: 86440077.5

Effective date: 19940410