EP1067204A1 - Process and device to prevent strip fluttering in the gas blowing zones, in particular in the cooling zones - Google Patents

Process and device to prevent strip fluttering in the gas blowing zones, in particular in the cooling zones Download PDF

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Publication number
EP1067204A1
EP1067204A1 EP00401702A EP00401702A EP1067204A1 EP 1067204 A1 EP1067204 A1 EP 1067204A1 EP 00401702 A EP00401702 A EP 00401702A EP 00401702 A EP00401702 A EP 00401702A EP 1067204 A1 EP1067204 A1 EP 1067204A1
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EP
European Patent Office
Prior art keywords
strip
blowing
gas
cooling
boxes
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Granted
Application number
EP00401702A
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German (de)
French (fr)
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EP1067204B1 (en
Inventor
Robert Wang
François Mignard
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Fives Stein SA
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Stein Heurtey SA
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/573—Continuous furnaces for strip or wire with cooling
    • C21D9/5735—Details
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material

Definitions

  • the present invention relates to a method and a device for suppress vibrations of continuously moving belts in areas a heat treatment or coating line where the blowing a gas on a continuously moving strip.
  • the invention applies in particular, without however being limited to this application to jet blast cooling devices fitted to lines heat treatment or continuous coating of metal strips.
  • FIG. 1 of the drawings represents in perspective and schematically, an area of rapid cooling 2 by blowing gas by jets, according to the previous state of the technique, which is crossed by a metal strip 1 passing over rollers 3 and 12.
  • the strip 1 is exposed to the cooling gas jets blown through a plurality of pairs of boxes such as 4 and 5, each box being positioned on either side of the strip 1.
  • the cooling boxes 4 and 5 have a limited length in order to allow the implantation of one or more a pair of stabilizing rollers such as 9 and 10, placed between two consecutive boxes as clearly seen in Figure 1 and which are intended to guide and stabilize the strip and in particular to limit vibrations of the latter under the action of the cooling jets.
  • blowing boxes 4 and 5 can be divided transversely into several boxes such as 6, 7 and 8 provided with gas supply means independent 13, 14, 15 and whose flow supply characteristics and / or pressure can be adjusted according to the level of cooling to be obtained on the strip.
  • FIGS. 2 and 3 There are various embodiments of the means for blowing the gas cooling on the strip.
  • US-B-3,068,586 describes a number examples of embodiment of these blowing means.
  • Figure 2 of the drawings attached represents in perspective and schematically a box of cooling of known type 4, provided with blowing holes 16, the diameter and mesh are adapted to the desired level of cooling.
  • the Figure 3 is a representation similar to Figure 2 but in which the cooling box 4 of known type is provided with blowing nozzles cylindrical 17 which are arranged in a rectangular mesh or in diamond over the entire surface of the box 4.
  • Figure 4 shows in a similar view to FIGS. 2 and 3 a known variant of a blowing box 4 which is provided with blowing nozzles in the form of slots 18 arranged on the entire width of the box.
  • the cooling gas which is blown onto the strip through the holes 16, the nozzles 17 or the nozzles 18 is channeled transversely over the entire width of the box, between it and the strip, so that it can be recycled by ducts which are located outside the cooling zone 2.
  • the means ensuring these functions are well known to those skilled in the art and they have not not shown in Figure 1.
  • FIG. 6 of the accompanying drawings there is shown a strip having a heterogeneous distribution of tension over its greater width in the center of the strip only on the banks, the origin of which may be rolling, the profile of rollers or heterogeneous heating or cooling or any other.
  • the belt tension is concentrated in its central part, the edges of the longer strip are less taut.
  • This difference of "soft" edge tension can cause the distance between the edges of the strip 1 and the boxes 4 and 5, along b and c, which causes the variation of the flow rates V's1, V's2, V'i1 and V'i2.
  • V'n1 is more small than V'n2 and V's1 is larger than V's2.
  • the band moves to a maximum position for which the pressure on side b increases and the pressure on side c decreases, and the opposite movement begins.
  • This phenomenon creates the torsional vibration of the band, symmetrical or not, which can be represented according to figure 7 which illustrates this vibration between two consecutive rolls.
  • This vibration in high flow blowing areas can reach amplitude values such that they can cause a contact between holes 16, nozzles 17 or 18 and the strip, which drives well understood, the appearance of surface defects on the strip 1 thus degrading the product obtained.
  • the vibrations of the strip may be such that they cause degradation of the cooling boxes and their holes or blowing nozzles.
  • the solution generally adopted in the prior art, for removing or at least reducing the vibration of the tape is to increase the distance between holes 16 or nozzles 17 or 18 and strip 1 or limit the blowing pressure in the boxes, which leads to limitation of the cooling efficiency resulting in a reduction of the production of the line in a proportion which can reach 40% of the nominal production.
  • the rolling defects of the strips to be treated in particular the long edges increase the risk of vibration of an exposed strip to a regime for recycling the gases blown on the unstable strip.
  • the evolution of the steel grades currently treated imposes slopes of cooling faster and faster from temperatures increasingly higher, with low band voltages, which generalizes the appearance of the torsional vibration of the strip.
  • the present invention has therefore set itself the objective of solving the problem described above, that is to say to suppress the vibrations of the band in the cooling zones, improving the recovery of cooling gases between the strip and the blowing box and by imposing a fixed position on the bandaged.
  • this invention aims firstly at a method making it possible to suppress vibrations of continuously moving belts in areas a heat treatment or coating line where the blowing a gas onto a continuously moving strip, in particular in jet blast cooling devices fitted to lines heat treatment or continuous coating of metal strips characterized in that it consists in adjusting the pressure and / or the flow rate of the gas cooling below the nominal value in an area located on a bank of the strip, on one side of it and at a higher value lower than the nominal value, on the opposite bank, located on the other side of the bandaged.
  • the invention also relates to a device intended to suppress vibrations from continuously moving belts in the cooling zones by gas blowing by jets equipping heat treatment lines in continuous metal strips, this device implementing the method as as defined above and being characterized in that it comprises boxes of blowing comprising means making it possible to adjust the pressure and / or the flow rate cooling gas at a lower value than the nominal value in an area located on one bank of the strip in the box located on one face of the strip and at a lower value than the nominal value on the opposite bank, on the box located on the other side of the strip.
  • Figure 8 very clearly represents schematic in section through a horizontal plane two blowing boxes 8 and 21 arranged on either side of the strip 1 in continuous movement.
  • each box is divided into several boxes elementary.
  • the box 8 is divided into three boxes 8, 7 and 6 each supplied individually with blowing gas at 13, 15 and 14.
  • each of the power supplies of the boxes is provided means for adjusting the flow rate and / or the supply pressure of the box corresponding.
  • These means are implemented and implemented so as to obtain a right / left asymmetrical blowing of the strip 1, as shown in FIG. 8, which creates a privileged direction of the flows of gas recovery on a band maintained in an equilibrium position.
  • these means make it possible to obtain a lower pressure level. in the end box 6 on one side of the strip and on the box opposite end 21 on the other side of the strip.
  • figure 8 we have represented by arrows the resulting pressure level, in the different parts of the boxes on each side of the strip.
  • box 8 was divided into three boxes 8, 7 and 6 each supplied individually with blowing gas at 13, 15 and 14 respectively.
  • these supply means are equipped with means for adjusting the pressure and / or the flow rate of cooling so as to obtain the right / left asymmetry of the strip specified above.
  • the adjustment of the pressure of the cooling gas is obtained by creating, in a box unique pressure drop to limit the pressure of the gas jets in previously defined areas to obtain asymmetry wanted.
  • This pressure drop can be fixed or variable, with in particular a possibility to modify the value of the pressure drop in function of the vibration to be fought.
  • an opening can also be provided. different from the blowing boxes between the right and left side of the strip, which favors a direction of gas recovery towards the side of the sections of most important recoveries.
  • suction means are provided external to the cooling zone, designed to draw in exhaust gases differential between the right and left sides of the strip, creating a preferred direction of gas flow.
  • the asymmetry sought is obtained by a variation in the length of the nozzles of blowing, when these are of the tubular type, between the right side and the side left of the boxes.
  • means can be provided for twisting the strip between the roller 3 located at the top of the cooling zone 2 and the stabilizer rollers such as 9 and 10 in Figure 1, the length of a blowing box, in order to immobilize the strip in an extreme position of its vibration range.
  • These means can also be provided between two groups of stabilizing rollers.
  • the measurement of the vibration of the strip (amplitude and position of the latter) can be performed using appropriate sensors whose information is analyzed by video images to ensure regulation of operations performed in order to limit the vibration of the belt for example pressure regulation in the blowing boxes or of the position of said boxes.
  • FIG. 9 of the accompanying drawings illustrate a another example of embodiment of a blowing box 4 provided with nozzles blowing 18 in the form of slots and designed to suppress the effect of the lateral discharge of the blowing gases after they have struck the strip.
  • the nozzles 18 are independent, they are generally supplied with cooling gas at their ends and they are separated from each other so as to provide an area of gas recovery 27 between two contiguous nozzles. Thanks to this arrangement, obtains a rear recovery of the gases blown on the strip, this recovery taking place in this space 27, perpendicular to the strip, without the velocity vector of this recovery does not have components parallel to the strip, the transverse component of the gas recovery speed of blowing being thus suppressed.
  • the invention provides means to limit the instability of trade flows cooling gases circulating towards the edges of the strip and which cause the previously observed torsional vibration of the strip. It is therefore possible, thanks to the invention, to work with tape tensions low and high flow rates and / or pressures of the cooling gas thus allowing rapid cooling cycles to be obtained.
  • the invention makes it possible to eliminate the production limitations imposed by the absence of a control of the vibration of the equipment strip according to the prior art. It also allows the deletion of surface defects found in equipment according to the technique anterior, during contact between the strip and the cooling boxes.
  • this invention is not limited to the modes of implementation described and / or mentioned above but that it includes all variants. Furthermore, and as mentioned in the preamble to this description, this invention is not limited to cooling devices but it can be applied in all areas of a heat treatment or coating line where performs the blowing of a gas on a continuously moving strip.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • General Details Of Gearings (AREA)
  • Advancing Webs (AREA)
  • Coating With Molten Metal (AREA)
  • Coating Apparatus (AREA)

Abstract

Vibration of metal strip moving continuously through the zones of a heat treatment or coating line and subjected to gas blowing, notably in cooling zones, is suppressed by adjusting cooling gas pressure and/or flow rate to below the rated value in an area located on an edge of the strip, on one surface, and to below the rated value on the opposite edge located on the other side of the strip. Cooling gas pressure adjustment is obtained by producing a pressure drop, in a single blowing box, to limit gas jet pressure in the zones, in order to obtain the objective asymmetry. The pressure drop can be fixed or variable, the value capable of being modified as a function of the vibration to be overcome. Independent claims are given for: (a) a unit intended for implementation of the above process, where the unit includes blowing boxes comprising a device for adjusting the pressure and/or the flow rate of cooling gas to a value below the rated value in an area located on an edge of the strip in the box located on a surface of the strip, and to a value below the rated value on the opposite edge, in the blowing box located on the other side of the strip; and (b) a line for the continuous heat treatment or coating of metal strips.

Description

La présente invention concerne un procédé et un dispositif destinés à supprimer les vibrations des bandes en déplacement continu dans les zones d'une ligne de traitement thermique ou de revêtement où est mis en oeuvre le soufflage d'un gaz sur une bande défilant en continu. L'invention s'applique tout particulièrement, sans cependant être limité à cette application aux dispositifs de refroidissement par soufflage de gaz par jets équipant des lignes de traitement thermique ou de revêtement en continu de bandes métalliques.The present invention relates to a method and a device for suppress vibrations of continuously moving belts in areas a heat treatment or coating line where the blowing a gas on a continuously moving strip. The invention applies in particular, without however being limited to this application to jet blast cooling devices fitted to lines heat treatment or continuous coating of metal strips.

Afin de bien faire comprendre le domaine technique auquel s'applique la présente invention, on se réfère en premier lieu à la figure 1 des dessins annexés qui représente en perspective et de façon schématique, une zone de refroidissement rapide 2 par soufflage de gaz par jets, selon l'état antérieur de la technique, qui est traversée par une bande métallique 1 en passant sur des rouleaux 3 et 12. Lors de la traversée de la zone de refroidissement 2 la bande 1 est exposée aux jets de gaz de refroidissement soufflés par l'intermédiaire d'une pluralité de paires de caissons tels que 4 et 5, chaque caisson étant positionné de part et d'autre de la bande 1. Les caissons de refroidissement 4 et 5 présentent une longueur limitée afin de permettre l'implantation d'un ou d'une paire de rouleaux stabilisateurs tels que 9 et 10, placés entre deux caissons consécutifs comme on le voit clairement sur la figure 1 et qui sont destinés à guider et stabiliser la bande et en particulier à limiter les vibrations de cette dernière sous l'action des jets de refroidissement.In order to clearly understand the technical field to which the present invention, reference is firstly made to FIG. 1 of the drawings annexed which represents in perspective and schematically, an area of rapid cooling 2 by blowing gas by jets, according to the previous state of the technique, which is crossed by a metal strip 1 passing over rollers 3 and 12. When crossing the cooling zone 2 the strip 1 is exposed to the cooling gas jets blown through a plurality of pairs of boxes such as 4 and 5, each box being positioned on either side of the strip 1. The cooling boxes 4 and 5 have a limited length in order to allow the implantation of one or more a pair of stabilizing rollers such as 9 and 10, placed between two consecutive boxes as clearly seen in Figure 1 and which are intended to guide and stabilize the strip and in particular to limit vibrations of the latter under the action of the cooling jets.

Les caissons de soufflage 4 et 5 peuvent être fractionnés transversalement en plusieurs caissons tels que 6, 7 et 8 munis de moyens d'alimentation de gaz indépendants 13, 14, 15 et dont les caractéristiques d'alimentation en débit et/ou en pression peuvent être réglées en fonction du niveau de refroidissement devant être obtenu sur la bande.The blowing boxes 4 and 5 can be divided transversely into several boxes such as 6, 7 and 8 provided with gas supply means independent 13, 14, 15 and whose flow supply characteristics and / or pressure can be adjusted according to the level of cooling to be obtained on the strip.

Il existe divers modes de réalisation des moyens permettant de souffler le gaz de refroidissement sur la bande. US-B-3 068 586 décrit un certain nombre d'exemples de réalisation de ces moyens de soufflage. La figure 2 des dessins annexés représente en perspective et de façon schématique un caisson de refroidissement de type connu 4, pourvu de trous de soufflage 16 dont le diamètre et la maille sont adaptés au niveau de refroidissement recherché. La figure 3 est une représentation similaire à la figure 2 mais dans laquelle le caisson de refroidissement 4 de type connu est pourvu de buses de soufflage cylindriques 17 qui sont disposées suivant une maille rectangulaire ou en losange sur toute la surface du caisson 4. Enfin, la figure 4 représente en une vue similaire aux figures 2 et 3 une variante connue d'un caisson de soufflage 4 qui est muni de buses de soufflage en forme de fentes 18 disposées sur toute la largeur du caisson.There are various embodiments of the means for blowing the gas cooling on the strip. US-B-3,068,586 describes a number examples of embodiment of these blowing means. Figure 2 of the drawings attached represents in perspective and schematically a box of cooling of known type 4, provided with blowing holes 16, the diameter and mesh are adapted to the desired level of cooling. The Figure 3 is a representation similar to Figure 2 but in which the cooling box 4 of known type is provided with blowing nozzles cylindrical 17 which are arranged in a rectangular mesh or in diamond over the entire surface of the box 4. Finally, Figure 4 shows in a similar view to FIGS. 2 and 3 a known variant of a blowing box 4 which is provided with blowing nozzles in the form of slots 18 arranged on the entire width of the box.

Le gaz de refroidissement qui est soufflé sur la bande par les trous 16, les buses 17 ou les buses 18 est canalisé transversalement sur toute la largeur du caisson, entre celui-ci et la bande, de manière à pouvoir être recyclé par des gaines qui sont situées à l'extérieur de la zone de refroidissement 2. Les moyens assurant ces fonctions sont bien connus de l'homme de l'art et ils n'ont pas été représentés sur la figure 1.The cooling gas which is blown onto the strip through the holes 16, the nozzles 17 or the nozzles 18 is channeled transversely over the entire width of the box, between it and the strip, so that it can be recycled by ducts which are located outside the cooling zone 2. The means ensuring these functions are well known to those skilled in the art and they have not not shown in Figure 1.

L'augmentation des performances des lignes de traitement thermique en continu des bandes métalliques, ainsi que la recherche de pentes de refroidissement plus importantes ont nécessité le rapprochement des trous 16 ou des buses 17 ou 18 de la bande 1 ainsi que la mise en oeuvre de débits et/ou de pression de soufflage de gaz de refroidissement de plus en plus importants. Cette évolution entraíne l'apparition d'un nouveau problème dans ce type de zone de refroidissement, à savoir la vibration de la bande entre les caissons de refroidissement, ce phénomène de vibration étant limité ou inconnu dans les équipements réalisés selon l'état antérieur de la technique. The increase in performance of heat treatment lines in continuous metal strips, as well as the search for slopes larger cooling required closer holes 16 or nozzles 17 or 18 of the strip 1 as well as the implementation of flow rates and / or increasing cooling gas blowing pressure important. This evolution leads to the appearance of a new problem in this type of cooling zone, namely the vibration of the strip between the cooling boxes, this vibration phenomenon being limited or unknown in equipment made according to the prior art.

Sur la figure 5 des dessins annexés on a représenté en coupe dans un plan horizontal des caissons de soufflage 4 et 5. Pour une situation stable théorique, la distance entre la bande et les caissons 4 et 5 est égale à la distance désignée par la référence a, les débits de soufflage dans les caissons 4 et 5 désignés par Vn et Vs sont égaux. Après soufflage sur la bande, les reprises de gaz s'effectuent suivant Vn1 et Vn2 ainsi que selon Vs1 et Vs2. Cet équilibre est caractérisé par Vn1 = Vn2 et Vs1 = Vs2.In Figure 5 of the accompanying drawings is shown in section in a plane horizontal of blowing boxes 4 and 5. For a stable situation theoretical, the distance between the strip and the boxes 4 and 5 is equal to the distance designated by the reference a, the blowing rates in the boxes 4 and 5 designated by Vn and Vs are equal. After blowing on the strip, the gas recovery takes place along Vn1 and Vn2 as well as Vs1 and Vs2. This equilibrium is characterized by Vn1 = Vn2 and Vs1 = Vs2.

Sur la figure 6 des dessins annexés, on a représenté une bande présentant une répartition hétérogène de tension sur sa largeur plus importante au centre de la bande que sur les rives, dont l'origine peut être le laminage, le profil des rouleaux ou le chauffage ou le refroidissement hétérogène ou tout autre. Dans cette configuration, la tension de bande se concentre dans sa partie centrale, les bords de la bande plus longs sont moins tendus. Cette différence de tension de bords « mous » peut provoquer la variation de la distance entre les rives de la bande 1 et les caissons 4 et 5, selon b et c, ce qui entraíne la variation des débits V's1, V's2, V'i1 et V'i2. Dans cet exemple, V'n1 est plus petit que V'n2 et V's1 est plus grand que V's2. Sous cette action, la bande se déplace jusqu'à une position maximale pour laquelle la pression côté b augmente et la pression côté c diminue, et le mouvement opposé s'amorçe. Ce phénomène créé la vibration de torsion de la bande, symétrique ou non, qui peut être représentée selon la figure 7 qui illustre cette vibration entre deux rouleaux consécutifs. Cette vibration dans les zones de soufflage à forts débits peut atteindre des valeurs d'amplitudes telles qu'elles puissent provoquer un contact entre les trous 16, les buses 17 ou 18 et la bande, ce qui entraíne bien entendu, l'apparition de défauts de surface sur la bande 1 dégradant ainsi le produit obtenu. En outre, les vibrations de la bande peuvent être telles qu'elles entraínent la dégradation des caissons de refroidissement et de leurs trous ou buses de soufflage.In Figure 6 of the accompanying drawings, there is shown a strip having a heterogeneous distribution of tension over its greater width in the center of the strip only on the banks, the origin of which may be rolling, the profile of rollers or heterogeneous heating or cooling or any other. In this configuration, the belt tension is concentrated in its central part, the edges of the longer strip are less taut. This difference of "soft" edge tension can cause the distance between the edges of the strip 1 and the boxes 4 and 5, along b and c, which causes the variation of the flow rates V's1, V's2, V'i1 and V'i2. In this example, V'n1 is more small than V'n2 and V's1 is larger than V's2. Under this action, the band moves to a maximum position for which the pressure on side b increases and the pressure on side c decreases, and the opposite movement begins. This phenomenon creates the torsional vibration of the band, symmetrical or not, which can be represented according to figure 7 which illustrates this vibration between two consecutive rolls. This vibration in high flow blowing areas can reach amplitude values such that they can cause a contact between holes 16, nozzles 17 or 18 and the strip, which drives well understood, the appearance of surface defects on the strip 1 thus degrading the product obtained. In addition, the vibrations of the strip may be such that they cause degradation of the cooling boxes and their holes or blowing nozzles.

Afin de résoudre ce problème on a tenté, dans la technique antérieure, de limiter les vibrations par une réduction de la longueur des caissons de soufflage ceci afin de rapprocher les rouleaux stabilisateurs 9 et 10 (figure 1). Cependant, cette technique limite la longueur utile de soufflage et donc l'efficacité du refroidissement de la zone.In order to resolve this problem, attempts have been made in the prior art to limit vibrations by reducing the length of the blowing this in order to bring the stabilizing rollers 9 and 10 together (Figure 1). However, this technique limits the useful blowing length and therefore the cooling efficiency of the area.

Une autre tentative pour résoudre ce problème a consisté à augmenter fortement la tension de la bande, mais cette solution n'est possible que pour les épaisseurs les plus importantes de bandes, elle ne peut être utilisée pour les bandes à haute température, les bandes les plus fines, les largeurs importantes ou en raison des caractéristiques de résistance mécanique des aciers traités constituant les bandes.Another attempt to resolve this problem has been to increase the tension of the belt, but this solution is only possible for the most important thicknesses of bands, it cannot be used for high temperature bands, thinner bands, widths important or because of the mechanical resistance characteristics of treated steels constituting the strips.

La solution généralement adoptée dans l'état antérieur de la technique, pour supprimer ou à tout le moins réduire la vibration de la bande consiste à augmenter la distance entre les trous 16 ou les buses 17 ou 18 et la bande 1 ou à limiter la pression de soufflage dans les caissons, ce qui entraíne une limitation de l'efficacité du refroidissement se traduisant par une réduction de la production de la ligne dans une proportion qui peut atteindre 40% de la production nominale.The solution generally adopted in the prior art, for removing or at least reducing the vibration of the tape is to increase the distance between holes 16 or nozzles 17 or 18 and strip 1 or limit the blowing pressure in the boxes, which leads to limitation of the cooling efficiency resulting in a reduction of the production of the line in a proportion which can reach 40% of the nominal production.

Par ailleurs, les défauts de laminage des bandes à traiter, en particulier les bords longs augmentent les risques de mise en vibration d'une bande exposée à un régime de recyclage des gaz soufflés sur la bande instable. En outre, l'évolution des nuances d'acier actuellement traités impose des pentes de refroidissement de plus en plus rapides à partir de températures de plus en plus élevées, avec des tensions de bandes faibles, ce qui généralise l'apparition de la vibration de torsion de la bande.Furthermore, the rolling defects of the strips to be treated, in particular the long edges increase the risk of vibration of an exposed strip to a regime for recycling the gases blown on the unstable strip. In addition, the evolution of the steel grades currently treated imposes slopes of cooling faster and faster from temperatures increasingly higher, with low band voltages, which generalizes the appearance of the torsional vibration of the strip.

La présente invention s'est donc fixé pour objectif de résoudre le problème exposé ci-dessus, c'est-à-dire de supprimer les vibrations de la bande dans les zones de refroidissement, en améliorant la reprise des gaz de refroidissement entre la bande et le caisson de soufflage et en imposant une position fixe à la bande. The present invention has therefore set itself the objective of solving the problem described above, that is to say to suppress the vibrations of the band in the cooling zones, improving the recovery of cooling gases between the strip and the blowing box and by imposing a fixed position on the bandaged.

En conséquence, cette invention vise en premier lieu un procédé permettant de supprimer les vibrations des bandes en déplacement continu dans les zones d'une ligne de traitement thermique ou de revêtement où est mis en oeuvre le soufflage d'un gaz sur une bande défilant en continu notamment dans des dispositifs de refroidissement par soufflage de gaz par jets équipant des lignes de traitement thermique ou de revêtement en continu de bandes métalliques caractérisé en ce qu'il consiste à ajuster la pression et/ou le débit du gaz de refroidissement à une valeur plus faible que la valeur nominale dans une zone située sur une rive de la bande, sur une face de celle-ci et à une valeur plus faible que la valeur nominale, sur la rive opposée, située de l'autre côté de la bande.Consequently, this invention aims firstly at a method making it possible to suppress vibrations of continuously moving belts in areas a heat treatment or coating line where the blowing a gas onto a continuously moving strip, in particular in jet blast cooling devices fitted to lines heat treatment or continuous coating of metal strips characterized in that it consists in adjusting the pressure and / or the flow rate of the gas cooling below the nominal value in an area located on a bank of the strip, on one side of it and at a higher value lower than the nominal value, on the opposite bank, located on the other side of the bandaged.

L'invention vise également un dispositif destiné à supprimer les vibrations des bandes en déplacement continu dans les zones de refroidissement par soufflage de gaz par jets équipant des lignes de traitement thermique en continu de bandes métalliques, ce dispositif mettant en oeuvre le procédé tel que défini ci-dessus et étant caractérisé en ce qu'il comporte des caissons de soufflage comportant des moyens permettant d'ajuster la pression et/ou le débit du gaz de refroidissement à une valeur plus faible que la valeur nominale dans une zone située sur une rive de la bande dans le caisson situé sur une face de la bande et à une valeur plus faible que la valeur nominale sur la rive opposée, sur le caisson situé de l'autre côté de la bande.The invention also relates to a device intended to suppress vibrations from continuously moving belts in the cooling zones by gas blowing by jets equipping heat treatment lines in continuous metal strips, this device implementing the method as as defined above and being characterized in that it comprises boxes of blowing comprising means making it possible to adjust the pressure and / or the flow rate cooling gas at a lower value than the nominal value in an area located on one bank of the strip in the box located on one face of the strip and at a lower value than the nominal value on the opposite bank, on the box located on the other side of the strip.

D'autres caractéristiques et avantages de la présente ressortiront de la lecture de la description faite ci-après en référence aux dessins annexés. Sur les dessins :

  • La figure 8 est une représentation schématique d'un exemple de réalisation de l'invention et,
  • La figure 9 est une vue schématique partielle d'un mode de réalisation selon l'invention d'un caisson de refroidissement et de ses buses de soufflage.
Other characteristics and advantages of the present will emerge from reading the description given below with reference to the accompanying drawings. In the drawings:
  • FIG. 8 is a schematic representation of an exemplary embodiment of the invention and,
  • Figure 9 is a partial schematic view of an embodiment according to the invention of a cooling box and its blowing nozzles.

On se réfère en premier lieu à la figure 8 qui représente de façon très schématique en coupe par un plan horizontal deux caissons de soufflage 8 et 21 disposés de part et d'autre de la bande 1 en déplacement continu. Sur cette figure on voit que chaque caisson est divisé en plusieurs caissons élémentaires. Ainsi, le caisson 8 est fractionné en trois caissons 8, 7 et 6 chacun alimenté individuellement en gaz de soufflage en 13, 15 et 14.We first refer to Figure 8 which very clearly represents schematic in section through a horizontal plane two blowing boxes 8 and 21 arranged on either side of the strip 1 in continuous movement. On this figure we see that each box is divided into several boxes elementary. Thus, the box 8 is divided into three boxes 8, 7 and 6 each supplied individually with blowing gas at 13, 15 and 14.

Selon la présente invention, chacune des alimentations des caissons est munie de moyens de réglage du débit et/ou de la pression d'alimentation du caisson correspondant. Ces moyens sont réalisés et mis en oeuvre de façon à obtenir un soufflage dissymétrique droite/gauche de la bande 1, telle que représenté sur la figure 8, ce qui créée une direction privilégiée des écoulements de reprise des gaz sur une bande maintenue dans une position d'équilibre. Par conséquent, ces moyens permettent d'obtenir un niveau de pression plus faible dans le caisson d'extrémité 6 sur une face de la bande et sur le caisson d'extrémité opposée 21 sur l'autre face de la bande. Sur la figure 8 on a représenté par des flèches le niveau de pression résultant, dans les différentes parties des caissons de chaque côté de la bande. La résultante de ce réglage est que la bande est soumise à un champ de forces dissymétrique qui lui donne une position d'équilibre telle que représentée sur la figure 8 avec un angle de torsion A1. Ce réglage de pression transversal dans le caisson de soufflage s'oppose au mouvement de torsion de la bande et oblige cette dernière à conserver sa position prédéfinie ou, tout au moins, en limite l'amplitude des vibrations.According to the present invention, each of the power supplies of the boxes is provided means for adjusting the flow rate and / or the supply pressure of the box corresponding. These means are implemented and implemented so as to obtain a right / left asymmetrical blowing of the strip 1, as shown in FIG. 8, which creates a privileged direction of the flows of gas recovery on a band maintained in an equilibrium position. Through Consequently, these means make it possible to obtain a lower pressure level. in the end box 6 on one side of the strip and on the box opposite end 21 on the other side of the strip. In figure 8 we have represented by arrows the resulting pressure level, in the different parts of the boxes on each side of the strip. The result of this adjustment is that the strip is subjected to an asymmetric force field which gives an equilibrium position as shown in figure 8 with a torsion angle A1. This transverse pressure setting in the blowing opposes the twisting movement of the strip and forces this last to keep its predefined position or, at least, at the limit the amplitude of the vibrations.

Dans l'exemple de réalisation décrit ci-dessus en référence à la figure 8, les caissons tels que 8 et 21 sont fractionnés en une pluralité de caissons élémentaires. Ainsi on a vu que, dans cet exemple de réalisation dépourvu de tout caractère limitatif, le caisson 8 était divisé en trois caissons 8, 7 et 6 chacun alimenté individuellement en gaz de soufflage en 13, 15 et 14 respectivement. Selon la présente invention, ces moyens d'alimentation sont équipés de moyens de réglage de la pression et/ou du débit de gaz de refroidissement de manière à obtenir la dissymétrie droite/gauche de la bande précisée ci-dessus. In the embodiment described above with reference to FIG. 8, the boxes such as 8 and 21 are split into a plurality of boxes elementary. Thus we have seen that, in this exemplary embodiment devoid of all limiting, box 8 was divided into three boxes 8, 7 and 6 each supplied individually with blowing gas at 13, 15 and 14 respectively. According to the present invention, these supply means are equipped with means for adjusting the pressure and / or the flow rate of cooling so as to obtain the right / left asymmetry of the strip specified above.

Selon un autre exemple de réalisation de l'invention, l'ajustement de la pression du gaz de refroidissement est obtenu en créant, dans un caisson unique, des pertes de charge permettant de limiter la pression des jets de gaz dans les zones précédemment définies permettant d'obtenir l'assymétrie recherchée. Cette perte de charge pouvant être fixe ou variable, avec notamment une possibilité de modifier la valeur de la perte de charge en fonction de la vibration à combattre.According to another exemplary embodiment of the invention, the adjustment of the pressure of the cooling gas is obtained by creating, in a box unique pressure drop to limit the pressure of the gas jets in previously defined areas to obtain asymmetry wanted. This pressure drop can be fixed or variable, with in particular a possibility to modify the value of the pressure drop in function of the vibration to be fought.

Selon la présente invention, on peut également prévoir une ouverture différente des caissons de soufflage entre le côté droit et gauche de la bande, ce qui favorise une direction de reprise des gaz vers le côté des sections de reprise les plus importantes.According to the present invention, an opening can also be provided. different from the blowing boxes between the right and left side of the strip, which favors a direction of gas recovery towards the side of the sections of most important recoveries.

Toujours selon la présente invention, on prévoit des moyens d'aspiration extérieurs à la zone de refroidissement, conçus de façon à aspirer les gaz de façon différentielle entre les côtés droit et gauche de la bande, créant ainsi une direction préférentielle d'écoulement des gaz.Still according to the present invention, suction means are provided. external to the cooling zone, designed to draw in exhaust gases differential between the right and left sides of the strip, creating a preferred direction of gas flow.

Selon un autre mode de réalisation de la présente invention, l'assymétrie recherchée est obtenue par une variation de la longueur des buses de soufflage, lorsque celles-ci sont du type tubulaire, entre le côté droit et le côté gauche des caissons.According to another embodiment of the present invention, the asymmetry sought is obtained by a variation in the length of the nozzles of blowing, when these are of the tubular type, between the right side and the side left of the boxes.

Selon la présente invention, on peut prévoir des moyens permettant de vriller la bande entre le rouleau 3 situé en haut de la zone de refroidissement 2 et les rouleaux stabilisateurs tels que 9 et 10 sur la figure 1, sur la longueur d'un caisson de soufflage, afin d'immobiliser la bande dans une position extrême de sa plage de vibration. Ces moyens peuvent également être prévus entre deux groupes de rouleaux stabilisateurs.According to the present invention, means can be provided for twisting the strip between the roller 3 located at the top of the cooling zone 2 and the stabilizer rollers such as 9 and 10 in Figure 1, the length of a blowing box, in order to immobilize the strip in an extreme position of its vibration range. These means can also be provided between two groups of stabilizing rollers.

Bien entendu, tous ces dispositifs peuvent être utilisés séparément ou en diverses combinaisons afin d'obtenir le résultat recherché. Of course, all these devices can be used separately or in combination various combinations to obtain the desired result.

Selon la présente invention, la mesure de la vibration de la bande (amplitude et position de cette dernière) peut être effectuée à l'aide de capteurs appropriés dont les informations sont analysées par images vidéo afin d'assurer une régulation des opérations réalisées en vue de limiter la vibration de la bande par exemple une régulation des pressions dans les caissons de soufflage ou de la position desdits caissons.According to the present invention, the measurement of the vibration of the strip (amplitude and position of the latter) can be performed using appropriate sensors whose information is analyzed by video images to ensure regulation of operations performed in order to limit the vibration of the belt for example pressure regulation in the blowing boxes or of the position of said boxes.

On se réfère maintenant à la figure 9 des dessins annexés qui illustrent un autre exemple de réalisation d'un caisson de soufflage 4 pourvu de buses de soufflage 18 en forme de fentes et conçu en vue de supprimer l'effet de l'évacuation latérale des gaz de soufflage après qu'ils aient frappé la bande. Dans cet exemple de réalisation, les buses 18 sont indépendantes, elles sont généralement alimentées en gaz de refroidissement par leurs extrémités et elles sont séparées les unes des autres de façon à ménager une zone de reprise de gaz 27 entre deux buses contigües. Grâce à cette disposition, on obtient une reprise arrière des gaz soufflés sur la bande, cette reprise s'effectuant dans cet espace 27, perpendiculairement à la bande, sans que le vecteur vitesse de cette reprise ne présente de composantes parallèles à la bande, la composante transversale de la vitesse de reprise des gaz de soufflage étant ainsi supprimée. On obtient Vn1 = Vn2 = Vs1 = Vs2 = 0. L'égalité des débits de reprise des gaz obtenu par ce moyen permet d'obtenir la stabilité de la bande, ce qui contribue à la solution du problème évoqué ci-dessus. Bien entendu, sans sortir du cadre de la présente invention, le caisson de soufflage 4 pourrait être pourvu de buses de souffage 18 constituées d'une série de trous alimentés de la manière décrite ci-dessus.Referring now to Figure 9 of the accompanying drawings which illustrate a another example of embodiment of a blowing box 4 provided with nozzles blowing 18 in the form of slots and designed to suppress the effect of the lateral discharge of the blowing gases after they have struck the strip. In this exemplary embodiment, the nozzles 18 are independent, they are generally supplied with cooling gas at their ends and they are separated from each other so as to provide an area of gas recovery 27 between two contiguous nozzles. Thanks to this arrangement, obtains a rear recovery of the gases blown on the strip, this recovery taking place in this space 27, perpendicular to the strip, without the velocity vector of this recovery does not have components parallel to the strip, the transverse component of the gas recovery speed of blowing being thus suppressed. We get Vn1 = Vn2 = Vs1 = Vs2 = 0. The equality of gas recovery rates obtained by this means makes it possible to obtain the stability of the strip, which contributes to the solution of the problem mentioned above. Of course, without departing from the scope of the present invention, the box blowing 4 could be provided with blowing nozzles 18 consisting of a series of holes supplied in the manner described above.

Il résulte de la lecture de la description qui précède que l'invention apporte effectivement des moyens permettant de limiter l'instabilité des flux de reprises des gaz de refroidissement circulant vers les rives de la bande et qui provoquent la vibration de torsion de la bande constatée antérieurement. Il est donc possible, grâce à l'invention, de travailler avec des tensions de bande faibles et des débits et/ou des pressions importants du gaz de refroidissement permettant ainsi d'obtenir des cycles de refroidissement rapides. It follows from reading the above description that the invention provides means to limit the instability of trade flows cooling gases circulating towards the edges of the strip and which cause the previously observed torsional vibration of the strip. It is therefore possible, thanks to the invention, to work with tape tensions low and high flow rates and / or pressures of the cooling gas thus allowing rapid cooling cycles to be obtained.

L'invention permet de supprimer les limitations de production imposées par l'absence d'un contrôle de la vibration de la bande des équipements selon l'état antérieur de la technique. Elle permet également la suppression des défauts de surface que l'on constate dans les équipements selon la technique antérieure, lors de contacts entre la bande et les caissons de refroidissement.The invention makes it possible to eliminate the production limitations imposed by the absence of a control of the vibration of the equipment strip according to the prior art. It also allows the deletion of surface defects found in equipment according to the technique anterior, during contact between the strip and the cooling boxes.

La mise en oeuvre de l'invention permet également de supprimer :

  • les contraintes mécaniques induites dans la bande par les vibrations ;
  • les risques de formation de plis sur la bande provoqués par la vibration de cette dernière et,
  • le bruit causé par les vibrations de la bande.
The implementation of the invention also makes it possible to remove:
  • the mechanical stresses induced in the strip by vibrations;
  • the risks of folds forming on the strip caused by the vibration of the latter and,
  • noise caused by tape vibrations.

Il demeure bien entendu que la présente invention n'est pas limitée aux modes de mise en oeuvre décrits et/ou mentionnés ci-dessus mais qu'elle en englobe toutes les variantes. Par ailleurs, et ainsi qu'on l'a mentionné dans le préambule de la présente description, cette invention ne se limite pas aux dispositifs de refroidissement mais elle peut être appliquée dans toutes les zones d'une ligne de traitement thermique ou de revêtement où est mis en oeuvre le soufflage d'un gaz sur une bande défilant en continu.It remains to be understood that the present invention is not limited to the modes of implementation described and / or mentioned above but that it includes all variants. Furthermore, and as mentioned in the preamble to this description, this invention is not limited to cooling devices but it can be applied in all areas of a heat treatment or coating line where performs the blowing of a gas on a continuously moving strip.

Claims (14)

Procédé permettant de supprimer les vibrations des bandes en déplacement continu dans les zones d'une ligne de traitement thermique ou de revêtement où est mis en oeuvre le soufflage d'un gaz sur une bande défilant en continu notamment dans des dispositifs de refroidissement par soufflage de gaz par jets équipant des lignes de traitement thermique ou de revêtement en continu de bandes métalliques caractérisé en ce qu'il consiste à ajuster la pression et/ou le débit du gaz de refroidissement à une valeur plus faible que la valeur nominale dans une zone située sur une rive de la bande, sur une face de celle-ci et à une valeur plus faible que la valeur nominale, sur la rive opposée, située de l'autre côté de la bande.Method for suppressing the vibrations of the bands in continuous movement in the areas of a heat treatment line or coating where the blowing of a gas is carried out on a moving strip continuously especially in blast cooling devices gas by jets equipping heat treatment or coating lines continuous metal strip characterized in that it consists in adjusting the pressure and / or flow of cooling gas to a value lower than the nominal value in an area located on one bank of the strip, on one side of this and at a lower value than the nominal value, on the shore opposite, located on the other side of the strip. Procédé selon la revendication 1 caractérisé en ce que l'ajustement de la pression du gaz de refroidissement est obtenu en créant, dans un caisson unique, des pertes de charge permettant de limiter la pression des jets de gaz dans les zones, afin d'obtenir l'assymétrie recherchée.Method according to claim 1 characterized in that the adjustment of the pressure of the cooling gas is obtained by creating, in a box unique pressure drop to limit the pressure of the gas jets in the zones, in order to obtain the desired asymmetry. Procédé selon la revendication 2 caractérisé en ce que ladite perte de charge est fixe.A method according to claim 2 characterized in that said loss of charge is fixed. Procédé selon la revendication 2 caractérisé en ce que ladite perte de charge est variable, sa valeur pouvant être modifiée en fonction de la vibration à combattre.A method according to claim 2 characterized in that said loss of load is variable, its value being able to be modified according to the vibration to fight. Dispositif destiné à supprimer les vibrations des bandes en déplacement continu dans les zones d'une ligne de traitement thermique ou de revêtement où est mis en oeuvre le soufflage d'un gaz sur une bande défilant en continu, notamment dans des dispositifs de refroidissement par soufflage de gaz par jets équipant des lignes de traitement thermique ou de revêtement en continu de bandes métalliques, ce dispositif mettant en oeuvre le procédé selon l'une quelconque des revendications précédentes étant caractérisé en ce qu'il comporte des caissons de soufflage (8, 21) comportant des moyens permettant d'ajuster la pression et/ou le débit du gaz de refroidissement à une valeur plus faible que la valeur nominale dans une zone située sur une rive de la bande dans le caisson (6) situé sur une face de la bande et à une valeur plus faible que la valeur nominale sur la rive opposée, dans le caisson (21) situé de l'autre côté de la bande (1).Device for suppressing vibrations of moving belts continuous in the areas of a heat treatment or coating line where the blowing of a gas is carried out on a continuously moving strip, in particular in devices for cooling by blowing gas by jets equipping heat treatment or continuous coating lines of metal strips, this device implementing the method according to one any of the preceding claims being characterized in that it comprises blowing boxes (8, 21) comprising means allowing to adjust the pressure and / or the flow rate of the cooling gas to a higher value lower than the nominal value in an area on a bank of the strip in the box (6) located on one side of the strip and at a lower value than the nominal value on the opposite bank, in the box (21) located the other side of the strip (1). Dispositif selon la revendication 5 caractérisé en ce que les caissons de soufflage sont fractionnés en plusieurs caissons élémentaires (par exemple 6 ; 7 ; 8) chacun alimentés individuellement en gaz de soufflage par un moyen d'alimentation indépendant (14, 15, 13) équipé de moyens de réglage de la pression et/ou du débit du gaz de refroidissement.Device according to claim 5 characterized in that the boxes of supply air are divided into several elementary boxes (for example 6; 7; 8) each supplied individually with blowing gas by a means independent power supply (14, 15, 13) equipped with means for adjusting the pressure and / or flow of cooling gas. Dispositif selon l'une des revendications 5 ou 6 caractérisé en ce que les gaz de refroidissement, après soufflage sur la bande 1 sont repris, par l'arrière, entre les moyens de soufflage des caissons.Device according to one of claims 5 or 6 characterized in that the cooling gases, after blowing on the strip 1 are taken up, by the rear, between the blowing means of the boxes. Dispositif selon la revendication 7 caractérisé en ce que chaque caisson de soufflage (4) est muni de buses de soufflage (18) en forme de fentes, ou d'une série de trous, ces buses alimentées de façon indépendante en gaz de refroidissement étant séparées les unes des autres de manière à ménager une zone de reprise des gaz (27) entre deux buses contigües.Device according to claim 7, characterized in that each box blowing nozzle (4) is provided with blowing nozzles (18) in the form of slots, or a series of holes, these nozzles independently supplied with cooling being separated from each other so as to provide a gas recovery zone (27) between two contiguous nozzles. Dispositif selon l'une quelconque des revendications 5 à 8 caractérisé en ce que l'on prévoit une ouverture différente des caissons de soufflage entre les côtés droit et gauche de la bande, de manière à favoriser une direction de reprise des gaz vers le côté des sections de reprise les plus importantes.Device according to any one of claims 5 to 8 characterized in that a different opening of the blowing boxes is provided between the right and left sides of the strip, so as to favor a direction of gas return to the side of the most important return sections. Dispositif selon l'une quelconque des revendications 5 à 9 caractérisé en ce qu'il comporte des moyens d'aspiration extérieurs à la zone de refroidissement (2), conçus de façon à aspirer les gaz de façon différentielle entre les côtés droit et gauche de la bande, créant ainsi une direction préférentielle d'écoulement des gaz. Device according to any one of claims 5 to 9 characterized in that it includes suction means external to the zone of cooling (2), designed to draw gases differently between the right and left sides of the strip, creating a direction preferential gas flow. Dispositif selon l'une quelconque des revendications 5 à 10 dans lequel les caissons de soufflage sont munis de buses tubulaires de soufflage caractérisé en ce que la longueur desdites buses de soufflage est variable entre le côté droit et le côté gauche desdits caissons.Device according to any one of claims 5 to 10 in which the blowing boxes are fitted with tubular blowing nozzles characterized in that the length of said blowing nozzles is variable between the right side and the left side of said boxes. Dispositif selon l'une quelconque des revendications 5 à 11 caractérisé en ce qu'il comporte des moyens permettant de vriller la bande (1) entre le rouleau (3) situé en haut de la zone de refroidissement (2) et des rouleaux stabilisateurs (9 ;10), ou entre deux groupes de rouleaux stabilisateurs sur la longueur d'un caisson de soufflage, afin d'immobiliser la bande dans une position extrême de sa plage de vibration.Device according to any one of claims 5 to 11 characterized in that it comprises means making it possible to twist the strip (1) between the roller (3) located at the top of the cooling zone (2) and the rollers stabilizers (9; 10), or between two groups of stabilizer rollers on the length of a blowing box, to immobilize the strip in a extreme position of its vibration range. Dispositif selon l'une quelconque des revendications 5 à 12 caractérisé en ce que la mesure de la vibration de la bande, c'est à dire l'amplitude et la position de cette dernière est effectuée à l'aide de capteurs dont les informations sont analysées afin d'assurer une régulation des opérations réalisées en vue de limiter la vibration de la bande, telles que notamment une régulation des pressions dans les caissons de soufflage ou de la position desdits caissons.Device according to any one of Claims 5 to 12, characterized in that the measurement of the tape vibration, i.e. the amplitude and the position of the latter is carried out using sensors whose information is analyzed in order to regulate operations carried out in order to limit the vibration of the strip, such as in particular a regulation of the pressures in the blowing boxes or of the position of said boxes. Ligne de traitement thermique ou de revêtement en continu de bandes métalliques comportant un soufflage d'un gaz sur les bandes et notamment des zones de refroidissement (2) par soufflage de gaz par jets caractérisée en ce qu'il comporte un dispositif de suppression des vibrations des bandes selon l'une quelconque des revendications 5 à 12 mettant en oeuvre un procédé selon l'une quelconque des revendications 1 à 4.Heat treatment or continuous strip coating line of metal comprising a blowing of a gas onto the strips and in particular of cooling zones (2) by gas blowing by jets, characterized in that it includes a device for suppressing the vibrations of the bands according to any one of claims 5 to 12 implementing a method according to any one of claims 1 to 4.
EP00401702A 1999-07-06 2000-06-15 Process and device to prevent strip fluttering in the gas blowing zones, in particular in the cooling zones Expired - Lifetime EP1067204B1 (en)

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FR9908709A FR2796139B1 (en) 1999-07-06 1999-07-06 METHOD AND DEVICE FOR SUPPRESSING THE VIBRATION OF STRIPS IN GAS BLOWING ZONES, ESPECIALLY COOLING ZONES

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2897620A1 (en) * 2006-02-21 2007-08-24 Stein Heurtey Cooling and stabilization of metal strip in a continuous heat treatment line by controlling the pressure in gas blown cooling boxes to provide a given cooling curve along the cooling length
FR2919877A1 (en) * 2007-08-10 2009-02-13 Siemens Vai Metals Tech Sas COOLING DEVICE AFTER GALVANIZING A BANDED PRODUCT
EP2100673A1 (en) * 2008-03-14 2009-09-16 ArcelorMittal France Method and device for blowing a gas onto a moving strip
US7763131B2 (en) 2004-10-19 2010-07-27 Cmi Thermline Services Method and apparatus for limiting the vibration of steel or aluminum strips in a blown-gas or -air cooling zones
CN107881635A (en) * 2017-12-06 2018-04-06 铜陵天润包装有限责任公司 A kind of container bag latitude and longitude scheduling apparatus quickly cooled down
CN114026259A (en) * 2019-07-11 2022-02-08 约翰考克利尔股份公司 Cooling device for blowing gas onto the surface of a running strip

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2802552B1 (en) * 1999-12-17 2002-03-29 Stein Heurtey METHOD AND APPARATUS FOR REDUCING WEB FOLDING IN A QUICK COOLING AREA OF A HEAT TREATMENT LINE
JP4331982B2 (en) * 2002-09-27 2009-09-16 新日本製鐵株式会社 Steel strip cooling device
JP4593976B2 (en) * 2004-05-31 2010-12-08 株式会社神戸製鋼所 Gas jet cooling device for steel plate in continuous annealing furnace
KR100685031B1 (en) * 2005-07-14 2007-02-20 주식회사 포스코 Gas Nozzle Device for Cooling Strip
DE502006004754D1 (en) * 2005-08-01 2009-10-15 Ebner Ind Ofenbau DEVICE FOR COOLING A METAL STRIP
AT502239B1 (en) * 2005-08-01 2007-07-15 Ebner Ind Ofenbau Device for cooling metal strip, e.g. steel strip after heat treatment, comprises groups of nozzles arranged in parallel nozzle strips with flow channels between them for removing cooling gas deflected from the metal strip
FR2931165B1 (en) 2008-05-13 2010-11-26 Cmi Thermline Services DEVICE FOR BLOWING GAS ON A FACE OF A THREADED STRIP MATERIAL
FR2942629B1 (en) * 2009-03-02 2011-11-04 Cmi Thermline Services METHOD FOR COOLING A METAL STRIP CIRCULATING IN A COOLING SECTION OF A CONTINUOUS THERMAL TREATMENT LINE, AND INSTALLATION FOR CARRYING OUT SAID METHOD
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DE102012110010B4 (en) 2012-10-19 2016-09-01 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Apparatus and method for the continuous treatment of a metal strip
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WO2016079841A1 (en) * 2014-11-20 2016-05-26 Ｊｆｅスチール株式会社 Metal band stabilizer and method for manufacturing hot-dip metal band using same
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DE102016103079A1 (en) * 2016-02-22 2017-08-24 Loi Thermprocess Gmbh Apparatus and method for heat treating a flat product
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CN111876583A (en) * 2020-08-31 2020-11-03 中冶南方（武汉）热工有限公司 Gas circulation jet cooling device
CN116043182B (en) * 2023-03-29 2023-06-13 合肥东昇机械科技有限公司 Blowing cooling device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068586A (en) * 1959-02-18 1962-12-18 Electric Furnace Co Forced cooling means and method for continuous strip furnaces
US3680756A (en) * 1968-12-14 1972-08-01 Mitsubishi Heavy Ind Ltd Means for preventing the fluttering and canoeing of strip work
JPS61117232A (en) * 1984-11-14 1986-06-04 Nippon Steel Corp Cooling apparatus of steel strip
US4625431A (en) * 1984-11-14 1986-12-02 Nippon Steel Corporation Strip cooling apparatus for continuous annealing furnace
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
US5885382A (en) * 1995-12-26 1999-03-23 Nippon Steel Corporation Primary cooling method in continuously annealing steel strip

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0653919B2 (en) * 1987-09-29 1994-07-20 川崎製鉄株式会社 Anti-vibration device for steel strip in steel strip processing line
JP2821823B2 (en) * 1991-08-16 1998-11-05 新日本製鐵株式会社 Coating weight control method for hot dip galvanizing
JP2605521B2 (en) * 1991-09-25 1997-04-30 日本鋼管株式会社 Vibration prevention method for hot-dip galvanized steel strip
JP3166300B2 (en) * 1992-05-22 2001-05-14 日本鋼管株式会社 Strip vibration prevention device in hot dip galvanizing line
JP3365652B2 (en) * 1993-06-29 2003-01-14 黒崎播磨株式会社 Strip cooling device
JP3134757B2 (en) * 1996-01-08 2001-02-13 日本鋼管株式会社 Vibration prevention method for hot-dip galvanized steel strip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3068586A (en) * 1959-02-18 1962-12-18 Electric Furnace Co Forced cooling means and method for continuous strip furnaces
US3680756A (en) * 1968-12-14 1972-08-01 Mitsubishi Heavy Ind Ltd Means for preventing the fluttering and canoeing of strip work
JPS61117232A (en) * 1984-11-14 1986-06-04 Nippon Steel Corp Cooling apparatus of steel strip
US4625431A (en) * 1984-11-14 1986-12-02 Nippon Steel Corporation Strip cooling apparatus for continuous annealing furnace
US5137586A (en) * 1991-01-02 1992-08-11 Klink James H Method for continuous annealing of metal strips
US5885382A (en) * 1995-12-26 1999-03-23 Nippon Steel Corporation Primary cooling method in continuously annealing steel strip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 303 (C - 378) 16 October 1986 (1986-10-16) *

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US7763131B2 (en) 2004-10-19 2010-07-27 Cmi Thermline Services Method and apparatus for limiting the vibration of steel or aluminum strips in a blown-gas or -air cooling zones
WO2007096502A3 (en) * 2006-02-21 2007-11-01 Stein Heurtey Method and device for cooling and stabilizing strip in a continuous line
CN101426939B (en) * 2006-02-21 2012-02-29 法孚斯坦因公司 Method and device for cooling and stabilizing strip in a continuous line
FR2897620A1 (en) * 2006-02-21 2007-08-24 Stein Heurtey Cooling and stabilization of metal strip in a continuous heat treatment line by controlling the pressure in gas blown cooling boxes to provide a given cooling curve along the cooling length
FR2919877A1 (en) * 2007-08-10 2009-02-13 Siemens Vai Metals Tech Sas COOLING DEVICE AFTER GALVANIZING A BANDED PRODUCT
WO2009024683A2 (en) * 2007-08-10 2009-02-26 Siemens Vai Metals Technologies Sas Cooling device for use following the galvanisation of a strip material
WO2009024683A3 (en) * 2007-08-10 2009-05-07 Siemens Vai Metals Tech Sas Cooling device for use following the galvanisation of a strip material
WO2009112654A1 (en) * 2008-03-14 2009-09-17 Arcelormittal France Method and device for blowing gas on a running strip
EP2100673A1 (en) * 2008-03-14 2009-09-16 ArcelorMittal France Method and device for blowing a gas onto a moving strip
US8591675B2 (en) 2008-03-14 2013-11-26 Arcelormittal France Method and device for blowing gas on a running strip
US9222700B2 (en) 2008-03-14 2015-12-29 Arcelormittal France Method and device for blowing gas on a running strip
CN107881635A (en) * 2017-12-06 2018-04-06 铜陵天润包装有限责任公司 A kind of container bag latitude and longitude scheduling apparatus quickly cooled down
CN114026259A (en) * 2019-07-11 2022-02-08 约翰考克利尔股份公司 Cooling device for blowing gas onto the surface of a running strip

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ATE279541T1 (en) 2004-10-15
DE1067204T1 (en) 2001-07-05
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FR2796139B1 (en) 2001-11-09
US6309483B1 (en) 2001-10-30
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DE60014781D1 (en) 2004-11-18
ES2153803T1 (en) 2001-03-16
DE60014781T2 (en) 2006-02-02
EP1067204B1 (en) 2004-10-13
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JP2001059119A (en) 2001-03-06
KR20010015171A (en) 2001-02-26

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