EP1486573A1 - Process and device for cooling a moving metallic strip - Google Patents
Process and device for cooling a moving metallic strip Download PDFInfo
- Publication number
- EP1486573A1 EP1486573A1 EP03291389A EP03291389A EP1486573A1 EP 1486573 A1 EP1486573 A1 EP 1486573A1 EP 03291389 A EP03291389 A EP 03291389A EP 03291389 A EP03291389 A EP 03291389A EP 1486573 A1 EP1486573 A1 EP 1486573A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- roll
- roller
- cooling
- support roller
- 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
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims description 11
- 239000000806 elastomer Substances 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 4
- 239000013529 heat transfer fluid Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 3
- 235000021183 entrée Nutrition 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009489 vacuum treatment Methods 0.000 description 1
Images
Classifications
-
- 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
- C21D9/5737—Rolls; Drums; Roll arrangements
-
- 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
Definitions
- the present invention relates to a method and a cooling installation of a metal strip in scrolling.
- Known methods of cooling by roll consist of applying a tape that moves in a continuous movement on at least one roll of cooling inside which circulates a liquid refrigerant, especially cold water.
- the roll is mobile in rotation about its axis, being driven either by the friction of the moving strip or by a motorized set clean.
- the band thus applied on the roll forms an arc whose intrados delimits with the outer surface of the roller a contact zone adapted for evacuate towards the inside of the roll part of the heat of the band.
- each of these rollers support is mounted for free rotation around its axis, the end of rigid arms, whose distance from to the cooling roll is predetermined in function of the thickness of the band.
- the object of the present invention is to propose a process and a cooling installation of a band metallic scrolling, which allow to maintain firmly tape against a cooling roll, while controlling this cooling and without impair the surface condition of the strip.
- the subject of the invention is also a plant of cooling a scrolling metal strip, said strip to be cooled being moved continuously, of the type having a main cooling roll on which the band is applied to form an arc whose the intrados demarcates with the outside face of this roll a contact zone adapted to evacuate inwards of the main cooling roll part of the heat of the tape, and at least one backup roll on the extrados of the arc formed by the strip, adapted for keep the tape in contact on the roll of main cooling, the or each support roll being disposed substantially parallel to the roll of main and mobile cooling in rotation around its axis, characterized in that the or each roller of support is constituted, at least at the periphery, of a an elastically deformable and thermo-capacitive material, and in that the installation comprises means for secondary cooling adapted to form with a part of the outer face of the or each support roll a zone of heat transfer to these means of secondary cooling to remove heat transmitted from the tape to the or each backup roll.
- This installation is for example used in coating treatments of the band, especially under vacuum.
- the cooling roll main 10 and the secondary cooling roll 16 are able to evacuate calories from their face outside towards the inside of the rollers when a body hot is applied on them.
- the rollers 10 and 16 comprise, in known manner, a double envelope to circulate in the inner periphery of these rolls a refrigerant, such as cold water.
- refrigerant such as cold water.
- Other types of contact cooling rollers known to those skilled in the art, are conceivable.
- the support roller 14 meanwhile formed of a piece cylindrical monoblock of axis Z-Z or a stack of coaxial cylinders of small thickness dependent or not.
- the roller 14 is made of an elastic material deformable, especially elastomer.
- the expression "elastically deformable material” should be considered as generally referring to a material whose modulus of elasticity (or Young's modulus) is significantly lower than that of the material forming the band 2, for reasons developed later.
- a suitable elastomer there may be mentioned a vulcanized silicone.
- the material constituting the support roll 14 presents in addition conductivity and capacitance properties preferred thermals, namely that it should not be totally or almost totally resistant to heat conduction, as could be for example a ceramic material but does not need either necessarily ensure a significant conduction like a current metal alloy. It must also be able to store within it the thermal energy withdrawn at the bandaged.
- the elastomer of which the support roll is made 14 has for example a conductivity coefficient less than about 1 W / m.K (watt per meter and by Kelvin) and a high heat capacity, for example on the order of 1000 J / kg.K (joule per kilogram and per Kelvin).
- the diameter of the roller 14 is preferably included between one fourth and one tenth of the diameter of the roll 10. From more, the length of this roller 14 is at least slightly greater than the width of the strip 2.
- Tape 2 coming upstream of the installation 1 of an adjoining production facility, a coil or of a heating installation not shown, arrives in entry of plant 1 at a temperature considered as hot, especially between the temperature ambient and a high temperature beyond which the material constituting the support roll 14 may be degraded, that is to say for example between the temperature ambient and about 200 ° C. His training may be at less partially provided by the cylinder 8A.
- the strip 2 is, at the output of the cylinder 8A, applied on the main cooling roll 10, around which the band forms the largest possible arc, by example of about 240 °, whose intrados is in contact with the outer face of the cylinder 10.
- the arc formed by the strip 2 is preferably in its winding start zone, kept in pressed contact on this roll by the rollers support 14.
- the relative position of the roller 14 with respect to the outer surface of the roll 10 is either pre-set, in particular depending on the thickness of the strip 2, controlled by elastically support means deformable so that the upper surface of strip 2 is subject to sufficient contact pressure to smooth out the band along its width and to favor the transfer heat of the cooling roll strip 10 into increasing the contact area between the lower surface of this band and the outer face of this roll.
- the low rigidity of the material forming the rollers support limits the risk of marking the upper surface of the band, even in the case where there is a lack of parallelism between the Z-Z and X-X axes.
- band 2 presents then a good transverse flatness.
- the material forming the support rollers 14 being thermo-capacitive, part of the heat of the tape is transferred from the tape to the backup roll, thus ensuring a complementary cooling of the bandaged.
- Scrolling the strip 2 causes the roll 14 in rotation about its axis, this roller 14 driving the cooling roller itself 16.
- the contact area that the roller holds 14 with the roller 16 allows the transfer of heat from the peripheral portion of the roller 14 to the inside of the roll 16. Since the material forming the support rollers is highly thermo-capacitive, the heat transferred from the tape to the backup roll 14 is stored on the periphery of roll 14 before being in turn transferred to the cooling rollers 16.
- the band 2 wraps around of the deflector roll 8B and leaves the installation 1.
- the method according to the invention thus makes it possible to cool in a controlled way the band 2, without damaging or marking its surfaces.
- the cooling obtained is at once homogeneous, thereby ensuring the homogeneity of the qualities of the cooled band, and fast, which reduces the duration of cooling and so the length of the area corresponding.
- rollers 14 The use of elastomer to form the rollers 14 is inexpensive and the roll of secondary cooling 16 is a technology already existing. Moreover, the fluid circulation network refrigerant sent to the main cooling roll 10 can advantageously be used, for example by means of of taps, to feed the roll of secondary cooling 16. In other words, from of a pre-existing cooling installation, the investment cost to have an installation according to the invention is minimal.
- FIG. 2 shows a variant of the installation 1 which differs from that of Figure 1 by, on the one hand, setting up, between the roll of main cooling 10 and the roll of secondary cooling 16, two support rollers 14 instead of one, and, secondly, replacing the cylinder 8B outlet baffle by a second cylinder of main cooling 12, for example analogous to roll 10.
- the operation of this installation is substantially similar to that of Figure 1.
- Tests 1 and 2 are performed without any roll while tests 3 and 4 are carried out with the two support rollers 14 of elastomer as shown in Figure 2.
- the surface layer of material of the rollers 14 can reach for a fairly short time, of the order the duration of the contact, the temperature of the band 2 with which rollers are in contact. This is especially the case when the tape speed is low, for example of the order of 20 m / min for the example of setting detailed in Tables 1 and 2 above.
- the contact time of the elastomer on the band is not sufficient for the heat exchange to be complete, the temperature of the elastomer remaining then less than that of the band. So, for a speed of scrolling of the order of 150 m / min, which corresponds to a scroll speed for an industrial installation, and for an input temperature of the band of the order of 150 ° C, the elastomer locally reaches a maximum of one temperature of the order of 100 ° C, which corresponds to a current service temperature for most vulcanized elastomers.
- Figure 3 represents a main cooling roll 10 associated with five support rollers 14 and four rollers of secondary cooling 16.
- the support roller or rollers 14 can have a multilayer structure, only the one and / or the outer layers to have the characteristics of flexibility and thermal capacity detailed above to achieve the invention.
- cooling roller 16 is replaceable by other means of cooling secondary, such as gas-jet quenching systems as long as these means form with part of the face external support rollers a sufficient area heat evacuation.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Continuous Casting (AREA)
Abstract
Description
La présente invention concerne un procédé et une installation de refroidissement d'une bande métallique en défilement.The present invention relates to a method and a cooling installation of a metal strip in scrolling.
Elle s'applique notamment aux traitements sous vide d'une telle bande, en particulier aux revêtements à chaud.It applies in particular to vacuum treatments such a strip, in particular to hot coatings.
Pour mener à bien des opérations de traitements thermiques, tels que des recuits ou des revêtements continus, d'une bande d'acier, il est généralement nécessaire de successivement chauffer et refroidir la bande, avec des vitesses prédéterminées. Pour refroidir une telle bande de manière contrôlée, on trempe la bande soit par un jet de gaz, soit par un jet de liquide, soit par au moins un rouleau de refroidissement sur lequel la bande vient en contact.To carry out treatment operations thermal, such as annealing or coatings continuous, of a steel strip, it is usually necessary to successively heat and cool the band, with predetermined speeds. To cool a such strip in a controlled manner, the strip is tempered either by a jet of gas, either by a jet of liquid, or by minus a cooling roll on which the band comes in contact.
Les procédés connus de refroidissement par rouleau consistent à appliquer une bande qui se déplace suivant un mouvement continu sur au moins un rouleau de refroidissement à l'intérieur duquel circule un liquide réfrigérant, notamment de l'eau froide. Le rouleau est mobile en rotation autour de son axe, en étant entraíné soit par le frottement de la bande en défilement, soit par un ensemble motorisé propre. La bande ainsi appliquée sur le rouleau forme un arc dont l'intrados délimite avec la face extérieure du rouleau une zone de contact adaptée pour évacuer vers l'intérieur du rouleau une partie de la chaleur de la bande.Known methods of cooling by roll consist of applying a tape that moves in a continuous movement on at least one roll of cooling inside which circulates a liquid refrigerant, especially cold water. The roll is mobile in rotation about its axis, being driven either by the friction of the moving strip or by a motorized set clean. The band thus applied on the roll forms an arc whose intrados delimits with the outer surface of the roller a contact zone adapted for evacuate towards the inside of the roll part of the heat of the band.
Pour améliorer le contact entre la bande et le rouleau de refroidissement, on a proposé par le passé de maintenir l'arc de bande en contact avec le rouleau au moyen de rouleaux métalliques d'appui sur l'extrados de l'arc. Pour garantir le maintien d'un effet de plaquage de la bande sur le rouleau de refroidissement, chacun de ces rouleaux d'appui est monté à rotation libre autour de son axe, à l'extrémité de bras rigides, dont l'éloignement par rapport au rouleau de refroidissement est prédéterminé en fonction de l'épaisseur de la bande.To improve the contact between the tape and the roll in the past, it has been proposed to maintain the arc of tape in contact with the roll by means of metal support rollers on the upper surface of the arc. For guarantee the maintenance of a plating effect of the band on the cooling roll, each of these rollers support is mounted for free rotation around its axis, the end of rigid arms, whose distance from to the cooling roll is predetermined in function of the thickness of the band.
Bien que de tels rouleaux d'appui métalliques génèrent le maintien escompté de la bande sur le rouleau de refroidissement, ils font courir le risque d'une part de marquer l'extrados de la bande, ce marquage pouvant être très profond en cas de défaut de parallélisme des axes du rouleau de refroidissement et des rouleaux d'appui, et d'autre part de perturber le refroidissement de la bande en raison de la rapide accumulation de chaleur dans les rouleaux d'appui.Although such metal backup rolls generate the expected maintenance of the tape on the roll of cooling, they run the risk of a share of mark the upper surface of the band, this marking being very deep in case of lack of parallelism of the axes of the cooling roll and backup rollers, and on the other hand to disturb the cooling of the band in because of the rapid accumulation of heat in the support rollers.
Le but de la présente invention est de proposer un procédé et une installation de refroidissement d'une bande métallique en défilement, qui permettent de maintenir fermement la bande contre un rouleau de refroidissement, tout en contrôlant ce refroidissement et sans pour autant nuire à l'état de surface de la bande.The object of the present invention is to propose a process and a cooling installation of a band metallic scrolling, which allow to maintain firmly tape against a cooling roll, while controlling this cooling and without impair the surface condition of the strip.
A cet effet, l'invention a pour objet un procédé de refroidissement d'une bande métallique en défilement, du type dans lequel :
- on déplace en continu la bande métallique à refroidir,
- on applique la bande sur un rouleau de refroidissement principal mobile autour de son axe de façon à ce que la bande forme un arc dont l'intrados délimite avec la face extérieure du rouleau de refroidissement principal une zone de contact adaptée pour évacuer vers l'intérieur de ce rouleau une partie de la chaleur de la bande, et
- on maintient la bande en contact avec le rouleau de refroidissement principal au moyen d'au moins un rouleau d'appui sur l'extrados de l'arc formé par la bande, le ou chaque rouleau d'appui étant disposé sensiblement parallèlement au rouleau de refroidissement principal et mobile en rotation autour de son axe,
- the metal strip to be cooled is continuously moved,
- the strip is applied to a main cooling roll movable about its axis so that the band forms an arc whose intrados delimits with the outer face of the main cooling roll a contact zone adapted to evacuate inwards from this roll some of the heat of the band, and
- the strip is held in contact with the main cooling roller by means of at least one support roller on the extrados of the arc formed by the strip, the or each support roller being arranged substantially parallel to the roller of main cooling and mobile in rotation about its axis,
Suivant d'autres caractéristiques de ce procédé, prises isolément ou selon toutes les combinaisons techniquement possibles :
- le ou chaque rouleau d'appui s'étend sur au moins toute la largeur de la bande de façon à appliquer sur l'extrados de l'arc formé par la bande une pression sensiblement homogène sur toute cette largeur ;
- la température de la bande appliquée en entrée du rouleau de refroidissement principal est inférieure à la température de dégradation de la matière constituant le ou les rouleaux d'appui ; et
- la température de la bande appliquée en entrée est inférieure à environ 200°C.
- the or each support roller extends over at least the entire width of the strip so as to apply on the extrados of the arc formed by the band a substantially homogeneous pressure over the entire width;
- the temperature of the strip applied at the inlet of the main cooling roll is less than the degradation temperature of the material constituting the at least one supporting roll; and
- the temperature of the input band is less than about 200 ° C.
L'invention a également pour objet une installation de refroidissement d'une bande métallique en défilement, ladite bande à refroidir étant déplacée en continu, du type comportant un rouleau de refroidissement principal sur lequel est appliquée la bande de façon à former un arc dont l'intrados délimite avec la face extérieure de ce rouleau une zone de contact adaptée pour évacuer vers l'intérieur du rouleau de refroidissement principal une partie de la chaleur de la bande, et au moins un rouleau d'appui sur l'extrados de l'arc formé par la bande, adapté pour maintenir la bande en contact sur le rouleau de refroidissement principal, le ou chaque rouleau d'appui étant disposé sensiblement parallèlement au rouleau de refroidissement principal et mobile en rotation autour de son axe, caractérisée en ce que le ou chaque rouleau d'appui est constitué, au moins en périphérie, d'une matière élastiquement déformable et thermo-capacitive, et en ce que l'installation comporte des moyens de refroidissement secondaire adaptés pour former avec une partie de la face externe du ou de chaque rouleau d'appui une zone de transfert de chaleur vers ces moyens de refroidissement secondaire en vue d'évacuer la chaleur transmise de la bande à le ou chaque rouleau d'appui.The subject of the invention is also a plant of cooling a scrolling metal strip, said strip to be cooled being moved continuously, of the type having a main cooling roll on which the band is applied to form an arc whose the intrados demarcates with the outside face of this roll a contact zone adapted to evacuate inwards of the main cooling roll part of the heat of the tape, and at least one backup roll on the extrados of the arc formed by the strip, adapted for keep the tape in contact on the roll of main cooling, the or each support roll being disposed substantially parallel to the roll of main and mobile cooling in rotation around its axis, characterized in that the or each roller of support is constituted, at least at the periphery, of a an elastically deformable and thermo-capacitive material, and in that the installation comprises means for secondary cooling adapted to form with a part of the outer face of the or each support roll a zone of heat transfer to these means of secondary cooling to remove heat transmitted from the tape to the or each backup roll.
Selon d'autres caractéristiques de cette installation, prises isolément ou selon toutes les combinaisons techniquement possibles :
- le ou chaque rouleau d'appui est réalisé, au moins en périphérie, en élastomère, notamment en silicone vulcanisé ;
- la matière dont est constitué au moins en périphérie le ou chaque rouleau d'appui, possède un coefficient de conductibilité thermique inférieur à 1 W/m.K ;
- le diamètre du ou de chaque rouleau d'appui est compris entre un quart et un dixième du diamètre du rouleau de refroidissement principal ;
- les moyens de refroidissement secondaire comportent au moins un rouleau de refroidissement secondaire mobile en rotation autour de son axe et disposé sensiblement parallèlement aux rouleaux d'appui ; et
- l'installation comporte des moyens d'alimentation avec un fluide caloporteur, communs au rouleau de refroidissement principal et aux moyens de refroidissement secondaire.
- the or each backing roll is made, at least peripherally, of elastomer, in particular vulcanized silicone;
- the material which is formed at least peripherally the or each support roller, has a coefficient of thermal conductivity of less than 1 W / mK;
- the diameter of the or each backing roll is between a quarter and a tenth of the diameter of the main cooling roll;
- the secondary cooling means comprise at least one secondary cooling roller movable in rotation about its axis and disposed substantially parallel to the support rollers; and
- the installation comprises supply means with a heat transfer fluid, common to the main cooling roller and the secondary cooling means.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins sur lesquels :
- la figure 1 est une vue schématique d'une installation de refroidissement selon l'invention ;
- les figures 2 et 3 sont des vues analogues à la figure 1, illustrant deux variantes de l'installation selon l'invention.
- Figure 1 is a schematic view of a cooling system according to the invention;
- Figures 2 and 3 are views similar to Figure 1, illustrating two variants of the installation according to the invention.
L'installation 1 représentée sur la figure 1 est
destinée à refroidir une bande d'acier 2, défilant suivant
le sens indiqué par les flèches 4. Cette installation est
par exemple utilisée lors de traitements de revêtements de
la bande, notamment sous vide.The installation 1 shown in FIG.
for cooling a
Cette installation comporte :
- deux
cylindres 8A et 8B de déflection de labande 2, pourvus éventuellement d'un système motorisé d'entraínement non représenté ; - un
rouleau 10 de refroidissement principal, d'axe X-X et agencé vis-à-vis des cylindres déflecteurs 8A et 8B de façon à ce que ces derniers guident labande 2 de manière adéquate, respectivement en entrée et en sortie durouleau 10 ; - un
rouleau 14 d'appui de la bande sur le rouleau derefroidissement 10, d'axe Z-Z sensiblement parallèle à l'axe X-X durouleau 10 et de préférence disposé sensiblement à l'aplomb de la zone d'enroulement de la bande autour durouleau 10 ; et - un
rouleau 16 de refroidissement secondaire, d'axe X'-X' parallèle à l'axe Z-Z desrouleaux 14, disposé en contact avec cesrouleaux 14 du côté opposé à celui durouleau 10, un même plan P formant des plans médians pour lesrouleaux 10 et 16.
- two
8A and 8B deflection of therollers band 2, optionally provided with a motorized drive system not shown; - a
main cooling roll 10, of axis XX and arranged vis-à-vis the 8A and 8B so that they guide thedeflector rolls strip 2 adequately, respectively at the inlet and at the outlet of theroll 10; - a
roll 14 for supporting the strip on thecooling roll 10, ZZ axis substantially parallel to the axis XX of theroll 10 and preferably disposed substantially above the winding zone of the strip around theroll 10; and - a
secondary cooling roll 16, of axis X'-X 'parallel to the axis ZZ of therollers 14, disposed in contact with theserollers 14 on the opposite side to that of theroll 10, the same plane P forming median planes for the 10 and 16.rollers
Plus précisément, le rouleau de refroidissement
principal 10 et le rouleau de refroidissement secondaire 16
sont à même d'évacuer des calories depuis leur face
extérieure vers l'intérieur des rouleaux lorsqu'un corps
chaud est appliqué sur eux. A cet effet, les rouleaux 10 et
16 comportent, de manière connue, une double enveloppe
permettant de faire circuler en périphérie interne de ces
rouleaux un fluide réfrigérant, tel que de l'eau froide.
D'autres types de rouleau de refroidissement par contact,
connus par l'homme du métier, sont envisageables.Specifically, the cooling roll
main 10 and the
Le rouleau d'appui 14 quant à lui formé d'une pièce
monobloc cylindrique d'axe Z-Z ou d'un empilement de
cylindres coaxiaux de faible épaisseur dépendants ou non.
Le rouleau 14 est réalisé en une matière élastiquement
déformable, notamment en élastomère. Pour la présente
invention, l'expression «matière élastiquement déformable»
est à considérer comme désignant de manière générale un
matériau dont le module d'élasticité (ou module de Young)
est nettement plus faible que celui du matériau formant la
bande 2, pour des raisons développées plus loin. A titre
d'exemple d'un élastomère approprié, on peut citer un
silicone vulcanisé. The
La matière constituant le rouleau d'appui 14 présente
en outre des propriétés de conductibilité et de capacité
thermiques préférées, à savoir qu'elle ne doit pas être
totalement ou quasiment totalement résistante à la
conduction de la chaleur, comme pourrait l'être par exemple
un matériau céramique, mais ne doit pas non plus
nécessairement assurer une conduction importante comme un
alliage métallique courant. Elle doit en outre pouvoir
stocker en son sein l'énergie thermique soutirée à la
bande. L'élastomère dont est constitué le rouleau d'appui
14 possède par exemple un coefficient de conductibilité
thermique inférieur à environ 1 W/m.K (watt par mètre et
par Kelvin) et une capacité calorifique élevée, par exemple
de l'ordre de 1000 J/kg.K (joule par kilogramme et par
Kelvin).The material constituting the
Le diamètre du rouleau 14 est de préférence compris
entre un quart et un dixième du diamètre du rouleau 10. De
plus, la longueur de ce rouleau 14 est au moins légèrement
supérieure à la largeur de la bande 2.The diameter of the
Le fonctionnement de l'installation 1, qui illustre le procédé selon l'invention, est le suivant :The operation of the installation 1, which illustrates the according to the invention is as follows:
La bande 2, provenant en amont de l'installation 1
d'une installation attenante de production, d'une bobine ou
d'une installation de chauffage non représentées, arrive en
entrée de l'installation 1 à une température considérée
comme chaude, comprise notamment entre la température
ambiante et une température haute au-delà de laquelle la
matière constituant le rouleau d'appui 14 risque d'être
dégradée, c'est-à-dire par exemple entre la température
ambiante et environ 200°C. Son entraínement peut être au
moins partiellement assuré par le cylindre 8A.
La bande 2 est, en sortie du cylindre 8A, appliquée
sur le rouleau de refroidissement principal 10, autour
duquel la bande forme un arc le plus grand possible, par
exemple de 240° environ, dont l'intrados est en contact
avec la face extérieure du cylindre 10. Lors de son
application sur le rouleau 10, l'arc formé par la bande 2
est, de préférence dans sa zone de début d'enroulement,
maintenu en contact pressé sur ce rouleau par les rouleaux
d'appui 14.The
La position relative du rouleau 14 par rapport à la
surface extérieure du rouleau 10 est soit pré-réglée,
notamment en fonction de l'épaisseur de la bande 2, soit
commandée par des moyens de support élastiquement
déformables de façon à ce que l'extrados de la bande 2 soit
soumise à une pression de contact suffisante pour aplanir
la bande suivant sa largeur et pour favoriser le transfert
de chaleur de la bande au rouleau de refroidissement 10 en
augmentant la surface de contact entre l'intrados de cette
bande et la face extérieure de ce rouleau.The relative position of the
La faible rigidité de la matière formant les rouleaux
d'appui limite les risques de marquage de l'extrados de la
bande, même dans le cas où existe un défaut de parallélisme
entre les axes Z-Z et X-X. De plus, la bande 2 présente
alors une bonne planéité transversale.The low rigidity of the material forming the rollers
support limits the risk of marking the upper surface of the
band, even in the case where there is a lack of parallelism
between the Z-Z and X-X axes. In addition,
En outre, la matière formant les rouleaux d'appui 14
étant thermo-capacitive, une partie de la chaleur de la
bande est transférée de la bande au rouleau d'appui,
assurant ainsi un refroidissement complémentaire de la
bande.In addition, the material forming the
Le défilement de la bande 2 entraíne le rouleau
d'appui 14 en rotation autour de son axe, ce rouleau 14
entraínant lui-même le rouleau de refroidissement
secondaire 16. La zone de contact que maintient le rouleau
d'appui 14 avec le rouleau 16 permet le transfert de
chaleur depuis la partie périphérique du rouleau 14 jusqu'à
l'intérieur du rouleau 16. Comme la matière formant les
rouleaux d'appui est fortement thermo-capacitive, la
chaleur transférée de la bande au rouleau d'appui 14 est
stockée en périphérie du rouleau 14 avant d'être à son tour
transférée aux rouleaux de refroidissement 16.Scrolling the
L'élasticité de la matière formant le rouleau d'appui
14 assure, même en cas de manque de parallélisme entre les
axes Z-Z et X' -X', la formation d'une grande surface de
contact entre le rouleau 14 et la face extérieur du rouleau
16, et donc un bon transfert calorifique.The elasticity of the material forming the
En sortie du rouleau 10, la bande 2 s'enroule autour
du cylindre déflecteur 8B et sort de l'installation 1.At the exit of the
Le procédé selon l'invention permet ainsi de refroidir
de manière contrôlée la bande 2, sans endommager ni marquer
ses surfaces. Le refroidissement obtenu est à la fois
homogène, assurant par là l'homogénéité des qualités de la
bande refroidie, et rapide, ce qui permet de réduire la
durée du refroidissement et ainsi la longueur de la zone
correspondante.The method according to the invention thus makes it possible to cool
in a controlled way the
L'utilisation d'élastomère pour former les rouleaux
d'appui 14 est peu onéreuse et le rouleau de
refroidissement secondaire 16 relève d'une technologie déjà
existante. D'ailleurs, le réseau de circulation du fluide
réfrigérant envoyé au rouleau de refroidissement principal
10 peut avantageusement être utilisé, par exemple au moyen
de dérivations, pour alimenter le rouleau de
refroidissement secondaire 16. En d'autres termes, à partir
d'une installation de refroidissement pré-existante, le
coût d'investissement pour disposer d'une installation
selon l'invention est minime.The use of elastomer to form the
Sur la figure 2 est représentée une variante de
l'installation 1 qui se distingue de celle de la figure 1
par, d'une part, la mise en place, entre le rouleau de
refroidissement principal 10 et le rouleau de
refroidissement secondaire 16, de deux rouleaux d'appui 14
au lieu d'un, et, d'autre part, le remplacement du cylindre
déflecteur de sortie 8B par un deuxième cylindre de
refroidissement principal 12, par exemple analogue au
rouleau 10. Le fonctionnement de cette installation est
sensiblement analogue à celui de la figure 1.FIG. 2 shows a variant of
the installation 1 which differs from that of Figure 1
by, on the one hand, setting up, between the roll of
Des exemples de mises en oeuvre de procédés selon l'art antérieur et selon l'invention avec l'installation 1 de la figure 2 sont détaillés ci-dessous. Dans les deux tableaux ci-après sont résumés les paramètres de fonctionnement de cette installation : Examples of implementations of methods according to the prior art and according to the invention with the installation 1 of FIG. 2 are detailed below. The following two tables summarize the operating parameters of this installation:
Dans le tableau ci-après sont résumés des résultats d'essais : In the table below are summarized test results:
Les essais 1 et 2 sont réalisés sans aucun rouleau
d'appui, tandis que les essais 3 et 4 sont réalisés avec
les deux rouleaux d'appui 14 en élastomère comme représenté
sur la figure 2.
On constate une efficacité de refroidissement quinze
fois plus importante sur le premier rouleau de
refroidissement principal 10 lorsque celui-ci est associé
aux deux rouleaux d'appui 14, mais également une
augmentation sensible sur le second rouleau de
refroidissement 12. ces résultats traduisent le fait que
les rouleaux d'appui 14 rendent une bonne planéité
transversale à la bande 2, permettant un refroidissement
important et homogène sur la largeur de la bande. Des
mesures de température par thermographie infra-rouge
confirment d'ailleurs que le refroidissement de température
est bien homogène.There is a cooling efficiency fifteen
times more important on the first roll of
Par ailleurs, concernant la température atteinte par
les rouleaux d'appui 14, on a pu déterminer que,
localement, la couche superficielle de matière des rouleaux
14 peut atteindre pendant un temps assez court, de l'ordre
de la durée du contact, la température de la bande 2 avec
laquelle ces rouleaux sont en contact. C'est surtout le cas
lorsque la vitesse de défilement de la bande est faible,
par exemple de l'ordre de 20 m/min pour l'exemple de mise
en oeuvre détaillé dans les tableaux 1 et 2 ci-dessus.Moreover, concerning the temperature reached by
the
Cependant, lorsque la vitesse de défilement de la bande augmente, la durée de contact de l'élastomère sur la bande ne suffit pas pour que l'échange de chaleur soit complet, la température de l'élastomère restant alors inférieure à celle de la bande. Ainsi, pour une vitesse de défilement de l'ordre de 150 m/min, ce qui correspond à une vitesse de défilement pour une installation industrielle, et pour une température d'entrée de la bande de l'ordre de 150°C, l'élastomère atteint localement au maximum une température de l'ordre de 100°C, ce qui correspond à une température de service courante pour la plupart des élastomères vulcanisés.However, when the scroll speed of the band increases, the contact time of the elastomer on the band is not sufficient for the heat exchange to be complete, the temperature of the elastomer remaining then less than that of the band. So, for a speed of scrolling of the order of 150 m / min, which corresponds to a scroll speed for an industrial installation, and for an input temperature of the band of the order of 150 ° C, the elastomer locally reaches a maximum of one temperature of the order of 100 ° C, which corresponds to a current service temperature for most vulcanized elastomers.
Divers aménagements et variantes au procédé et à
l'installation décrits ci-dessus sont envisageables. En
particulier, Le nombre de rouleaux d'appui et de rouleaux
de refroidissement secondaire, leurs dimensions, ainsi que
leur agencement ne sont limités que par l'espace libre
disponible autour du rouleau de refroidissement principal
considéré. Toute combinaison est possible, pour autant que
chaque rouleau d'appui soit refroidi par au moins un
rouleau secondaire. A titre d'exemple, la figure 3
représente un rouleau de refroidissement principal 10
associé à cinq rouleaux d'appui 14 et à quatre rouleaux de
refroidissement secondaire 16.Various arrangements and variants of the process and
the installation described above are possible. In
The number of support rollers and rollers
secondary cooling, their dimensions, as well as
their layout is limited only by the free space
available around the main cooling roll
considered. Any combination is possible, provided that
each backing roll is cooled by at least one
secondary roller. For example, Figure 3
represents a
En outre, le ou les rouleaux d'appui 14 peuvent
comporter une structure multicouches, seules la et/ou les
couches externes devant posséder les caractéristiques de
souplesse et de capacité thermique détaillées plus haut
pour réaliser l'invention.In addition, the support roller or
Par ailleurs, le rouleau de refroidissement 16 est
remplaçable par d'autres moyens de refroidissement
secondaire, tels que des systèmes à trempe par jet de gaz
tant que ces moyens forment avec une partie de la face
externe des rouleaux d'appui une zone suffisante
d'évacuation de chaleur.Moreover, the cooling
Claims (10)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60302777T DE60302777T2 (en) | 2003-06-11 | 2003-06-11 | Method and device for cooling a moving metallic strip |
ES03291389T ES2253645T3 (en) | 2003-06-11 | 2003-06-11 | REFRIGERATION PROCEDURE AND INSTALLATION OF A MOVING METAL BAND. |
AT03291389T ATE312948T1 (en) | 2003-06-11 | 2003-06-11 | METHOD AND DEVICE FOR COOLING A MOVING METALLIC STRIP |
EP03291389A EP1486573B1 (en) | 2003-06-11 | 2003-06-11 | Process and device for cooling a moving metallic strip |
US10/560,175 US7527701B2 (en) | 2003-06-11 | 2004-06-09 | Method and plant for cooling a moving metal strip |
CNB2004800159915A CN100424194C (en) | 2003-06-11 | 2004-06-09 | Process and device for cooling a moving metallic strip |
BRPI0411380-2A BRPI0411380B1 (en) | 2003-06-11 | 2004-06-09 | COOLING PROCESS AND INSTALLATION OF A MOVING METAL STRIP |
PCT/FR2004/001441 WO2004111280A2 (en) | 2003-06-11 | 2004-06-09 | Method and plant for cooling a moving metal strip |
JP2006516279A JP4676432B2 (en) | 2003-06-11 | 2004-06-09 | Method and plant for cooling moving metal strip |
CA2528688A CA2528688C (en) | 2003-06-11 | 2004-06-09 | Method and plant for cooling a moving metal strip |
RU2006100290/02A RU2336338C2 (en) | 2003-06-11 | 2004-06-09 | Method and installation for metal band cooling during drawing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03291389A EP1486573B1 (en) | 2003-06-11 | 2003-06-11 | Process and device for cooling a moving metallic strip |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1486573A1 true EP1486573A1 (en) | 2004-12-15 |
EP1486573B1 EP1486573B1 (en) | 2005-12-14 |
Family
ID=33185988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03291389A Expired - Lifetime EP1486573B1 (en) | 2003-06-11 | 2003-06-11 | Process and device for cooling a moving metallic strip |
Country Status (11)
Country | Link |
---|---|
US (1) | US7527701B2 (en) |
EP (1) | EP1486573B1 (en) |
JP (1) | JP4676432B2 (en) |
CN (1) | CN100424194C (en) |
AT (1) | ATE312948T1 (en) |
BR (1) | BRPI0411380B1 (en) |
CA (1) | CA2528688C (en) |
DE (1) | DE60302777T2 (en) |
ES (1) | ES2253645T3 (en) |
RU (1) | RU2336338C2 (en) |
WO (1) | WO2004111280A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2143504A1 (en) * | 2008-07-07 | 2010-01-13 | Siemens Aktiengesellschaft | Method for cooling a hot-rolled strip onto a hot-rolled strip coil, a device for cooling a hot-rolled strip coil, a control and/or regulating device and metal strip |
JP2011042814A (en) * | 2009-08-19 | 2011-03-03 | Chugai Ro Co Ltd | Apparatus and method for cooling metallic strip |
DE102012020622A1 (en) * | 2012-10-19 | 2014-04-24 | Maschinenfabrik Niehoff Gmbh & Co Kg | Device for heat transfer in the production of elongated extrudates |
CN103358599A (en) * | 2013-08-02 | 2013-10-23 | 常熟市沪虞港口机械有限公司 | Corrugated roller structure for paper box machinery |
CN109746271B (en) * | 2019-01-14 | 2020-04-10 | 中南大学 | Cryogenic rolling preparation method of high-performance copper foil |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743939A (en) * | 1980-08-29 | 1982-03-12 | Nippon Steel Corp | Structure for turning and conveying strip in continuously annealing furnace |
JPS60255933A (en) * | 1984-05-30 | 1985-12-17 | Nisshin Steel Co Ltd | Device for cooling metallic strip |
JPH0211729A (en) * | 1988-06-30 | 1990-01-16 | Kawasaki Steel Corp | Continuous heat treating method for metal strip |
EP0418166A1 (en) * | 1989-09-14 | 1991-03-20 | Sollac | Roll contact cooling device for continuous quenching of preheated steel strip |
JPH04107221A (en) * | 1990-08-28 | 1992-04-08 | Nkk Corp | Device for cooling strip in continuous annealing furnace |
US6056913A (en) * | 1997-09-22 | 2000-05-02 | Ebner; Peter | Plant for the continuous heat treatment of steel strips or the like |
JP2001323325A (en) * | 2000-05-11 | 2001-11-22 | Nippon Steel Corp | Apparatus and method for cooling metal strip |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61243127A (en) * | 1985-04-18 | 1986-10-29 | Nippon Steel Corp | Cooling method for metallic strip |
JPH03170619A (en) * | 1989-11-30 | 1991-07-24 | Kawasaki Steel Corp | Device for cooling in roll in continuous annealing furnace |
US5182074A (en) * | 1990-07-31 | 1993-01-26 | Nkk Corporation | Apparatus for continuously cooling metal strip |
-
2003
- 2003-06-11 AT AT03291389T patent/ATE312948T1/en active
- 2003-06-11 ES ES03291389T patent/ES2253645T3/en not_active Expired - Lifetime
- 2003-06-11 DE DE60302777T patent/DE60302777T2/en not_active Expired - Lifetime
- 2003-06-11 EP EP03291389A patent/EP1486573B1/en not_active Expired - Lifetime
-
2004
- 2004-06-09 CA CA2528688A patent/CA2528688C/en not_active Expired - Lifetime
- 2004-06-09 RU RU2006100290/02A patent/RU2336338C2/en active
- 2004-06-09 BR BRPI0411380-2A patent/BRPI0411380B1/en active IP Right Grant
- 2004-06-09 CN CNB2004800159915A patent/CN100424194C/en not_active Expired - Lifetime
- 2004-06-09 WO PCT/FR2004/001441 patent/WO2004111280A2/en active Application Filing
- 2004-06-09 JP JP2006516279A patent/JP4676432B2/en not_active Expired - Lifetime
- 2004-06-09 US US10/560,175 patent/US7527701B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743939A (en) * | 1980-08-29 | 1982-03-12 | Nippon Steel Corp | Structure for turning and conveying strip in continuously annealing furnace |
JPS60255933A (en) * | 1984-05-30 | 1985-12-17 | Nisshin Steel Co Ltd | Device for cooling metallic strip |
JPH0211729A (en) * | 1988-06-30 | 1990-01-16 | Kawasaki Steel Corp | Continuous heat treating method for metal strip |
EP0418166A1 (en) * | 1989-09-14 | 1991-03-20 | Sollac | Roll contact cooling device for continuous quenching of preheated steel strip |
JPH04107221A (en) * | 1990-08-28 | 1992-04-08 | Nkk Corp | Device for cooling strip in continuous annealing furnace |
US6056913A (en) * | 1997-09-22 | 2000-05-02 | Ebner; Peter | Plant for the continuous heat treatment of steel strips or the like |
JP2001323325A (en) * | 2000-05-11 | 2001-11-22 | Nippon Steel Corp | Apparatus and method for cooling metal strip |
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Title |
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PATENT ABSTRACTS OF JAPAN vol. 006, no. 118 (C - 111) 2 July 1982 (1982-07-02) * |
PATENT ABSTRACTS OF JAPAN vol. 010, no. 131 (C - 346) 15 May 1986 (1986-05-15) * |
PATENT ABSTRACTS OF JAPAN vol. 014, no. 137 (C - 0702) 15 March 1990 (1990-03-15) * |
PATENT ABSTRACTS OF JAPAN vol. 016, no. 351 (C - 0968) 29 July 1992 (1992-07-29) * |
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 03 3 April 2002 (2002-04-03) * |
Also Published As
Publication number | Publication date |
---|---|
WO2004111280A3 (en) | 2005-02-17 |
RU2006100290A (en) | 2006-06-10 |
ATE312948T1 (en) | 2005-12-15 |
CN100424194C (en) | 2008-10-08 |
DE60302777T2 (en) | 2006-07-06 |
WO2004111280A2 (en) | 2004-12-23 |
ES2253645T3 (en) | 2006-06-01 |
RU2336338C2 (en) | 2008-10-20 |
JP2006527307A (en) | 2006-11-30 |
CN1802444A (en) | 2006-07-12 |
EP1486573B1 (en) | 2005-12-14 |
CA2528688A1 (en) | 2004-12-23 |
BRPI0411380A (en) | 2006-08-01 |
DE60302777D1 (en) | 2006-01-19 |
US7527701B2 (en) | 2009-05-05 |
JP4676432B2 (en) | 2011-04-27 |
US20060254682A1 (en) | 2006-11-16 |
CA2528688C (en) | 2012-03-06 |
BRPI0411380B1 (en) | 2014-08-12 |
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