EP0132249A2 - Process and device to produce concrete reinforcement bars on a high speed wire mill - Google Patents
Process and device to produce concrete reinforcement bars on a high speed wire mill Download PDFInfo
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- EP0132249A2 EP0132249A2 EP84870100A EP84870100A EP0132249A2 EP 0132249 A2 EP0132249 A2 EP 0132249A2 EP 84870100 A EP84870100 A EP 84870100A EP 84870100 A EP84870100 A EP 84870100A EP 0132249 A2 EP0132249 A2 EP 0132249A2
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- Prior art keywords
- cooling
- block
- wire
- cooling device
- product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/14—Twisting
- B21D11/15—Reinforcing rods for concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
- B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/006—Pinch roll sets
Definitions
- the subject of the present invention is a method and devices for the manufacture, on a high-speed wire train, of steel concrete reinforcements, having both a high yield strength and a high ductility, as well as, if one desired, good weldability; this manufacturing is carried out by means of an abrupt cooling treatment applied during or immediately after rolling.
- the first consists in incorporating microalloy elements into the steel; such as niobium or vanadium. This technique is however expensive, because of the price of the alloying elements.
- the second means is to increase the elastic limit of the steel, by a cold deformation operation, in particular by torsion, of the bar.
- the gain in elasticity limit is achieved at the expense of the elongation.
- the process of the present invention takes place among the recent technique consisting in applying to hot-rolled concrete reinforcements, during or immediately after rolling, a sudden cooling, limited in time, so as to produce in the bar a surface layer of martensite; this "quenching" is sulvier from cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
- a sudden cooling limited in time, so as to produce in the bar a surface layer of martensite; this "quenching" is sulvier from cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides.
- Such judicious limitation of the duration of the abrupt cooling can be ensured by targeting a determined temperature at the core, at the end of the abrupt cooling phase; practically, the conduct of such an operation can be ensured by observing the temperature of the surface at the location of the bar where there is a heating due to the contribution of calories from the heart.
- the trainer is normally capable of exerting a traction of value T, but for the rolling operation to take place correctly, the traction X exerted in the wire downstream of the finishing block must be greater than a minimum value , suitable for driving the wire out of the block.
- the traction X at the outlet of the block, is in reality the difference between the traction force T of the driver and the braking force F applied to the wire mainly during the passage of the latter in the cooling device.
- the experiments carried out have made it possible to establish that the braking force F was a function K of the length L of the cooling device, the coefficient K being itself a function of the nature of the cooling device, of the fluid flow and the relative speed of the wire relative to the coolant.
- the subject of the present invention is an improved installation making it possible to apply to the traveling wire at 'high speed the quenching / self-tempering treatment capable of providing it with a combination, considered to be optimal, of elastic limit and elongation.
- a first object of the present invention consists in applying to the product, upstream of the finishing block and / or at the level of this block, cooling intended to bring the temperature of the wire at the outlet of the block below what it is normally, that is to say when applying cooling at the block level only to obtain, for example, a substantially constant temperature in the block.
- This additional cooling treatment, upstream or at the level of the block, has the result of increasing the stiffness of the wire at the outlet of the block, therefore reducing the minimum traction necessary for the smooth running of the operation; in addition, the minimum length of the cooling ramp necessary for quenching will be shortened, which will decrease the value of the braking force F.
- a second object of the present invention consists in using a cooling device with a low braking coefficient K.
- the cooling fluid consists of a water / air mixture which is more compressible and therefore less braking than the water usually used; under these conditions, if the coefficient K actually decreases, the length L necessary for the quenching operation must however be increased, since the specific power of the cooling is lowered; it was however observed that the product K x L, that is to say the braking force, was ultimately lower.
- cooling devices are used provided with helical injection slots, of a type for example described elsewhere in Belgian patent n ° 867.299.
- a third object of the present invention consists in increasing the traction force T developed by the trainer.
- the power available in the trainer is increased; according to a second modality, which can be associated with the first, several pairs of drive rollers are used, possibly offset with respect to each other from the point of view of their level, which obliges the thread to be traversed in the leader a wavy trajectory.
- FIG. 1 the elements which constitute the usual installation for the end of rolling are shown in solid lines: in the direction of flow of the wire, the intermediate train is encountered in 1, in 2, the finishing block, in 3, the intense cooling device or "quenching gun", and in 4, the roller drive; between the finisher 2 and the barrel 3, the traction X on the wire is equal to the difference between the force T exerted by the driver 4 and the braking F undergone by the wire mainly in the barrel 3.
- FIG. 1 are shown in dashed lines two of the improvements which are the subject of the invention: in 6 there is shown a device for cooling the wire at the entrance to the finisher block while additional drive rollers are arranged at 7.
- Figure II is a longitudinal section of an intense water-air cooling device which offers the characteristic of low internal braking, due to the compressibility of the fluid which circulates in this device.
- 8 are distinguished air blowing channels in the annular slot 9 for injection inside the barrel 10; the water-air mixture is injected in the direction of flow of the wire.
- this device is equipped with means for adjusting its cooling power, for example to modify the ratio between the water and air flow rates, or even the temperature of the water.
- the method according to the invention can be used to manufacture reinforcements both smooth and crenellated, participating actively or passively in the strength of the concrete structure, possibly used in truss assemblies.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
- Reinforcement Elements For Buildings (AREA)
- Wire Processing (AREA)
Abstract
Description
La présente invention a pour objet un procédé et des dispositifs pour la fabrication, sur train à fil à grande vitesse, d'armatures à béton en acier, ayant à la fois une limite d'élasticité et une ductilité élevées,ainsi que, si on le désire, une bonne soudabilité; cette fabrication est assurée au moyen d'un traitement de refroidissement brusque appliqué pendant ou immédiatement après le laminage.The subject of the present invention is a method and devices for the manufacture, on a high-speed wire train, of steel concrete reinforcements, having both a high yield strength and a high ductility, as well as, if one desired, good weldability; this manufacturing is carried out by means of an abrupt cooling treatment applied during or immediately after rolling.
On sait que le lamineur désirant résoudre le problème qui vient d'être posé doit tenir compte de plusieurs contraintes qui lui sont imposées. En premier lieu, son installation de laminage fixe pratiquement la vitesse et la température de sortie des barres; en outre, le lamineur dispose d'un emplacement limité pour l'installation éventuelle d'un dispositif de refroidissement.We know that the laminator wishing to solve the problem which has just been raised must take into account several constraints which are imposed on it. Firstly, its rolling installation practically fixes the speed and the temperature of the bars leaving; in addition, the laminator has a limited location for the possible installation of a cooling device.
Particulièrement dans le cas des trains à fil, la vitesse de sortie dans les installations modernes est très élevée, de l'ordre d'une centaine de mètres par seconde.Particularly in the case of wire trains, the exit speed in modern installations is very high, of the order of a hundred meters per second.
On sait que métallurgiquement parlant, il existe déjà plusieurs solutions pour arriver à un compromis entre les propriétés mécaniques d'une part et le prix de revient d'autre part.We know that metallurgically speaking, there are already several solutions to reach a compromise between the mechanical properties on the one hand and the cost price on the other hand.
Une première solution consiste à produire des armatures en acier "naturellement dur" dont la limite d'élasticité est obtenue par addition de carbone (par exemple 0,35 %) et de manganèse (par exemple 1,3 %); ces aciers présentent une limite d'élasticité acceptable (= 420 MPa), mais leur allongement et leur aptitude au pliage sont relativement faibles et leur soudabilité nettement insuffisante.A first solution consists in producing "naturally hard" steel reinforcements, the yield strength of which is obtained by adding carbon (for example 0.35%) and manganese (for example 1.3%); these steels have an acceptable elastic limit (= 420 MPa), but their elongation and their bendability are relatively low and their weldability clearly insufficient.
Pour améliorer la soudabilité, il faut diminuer la teneur en carbone, ce qui entraîne une diminution de la limite d'élasticité.To improve the weldability, it is necessary to decrease the carbon content, which leads to a reduction in the elastic limit.
Pour compenser cette diminution de la limite d'élasticité, il existe deux moyens connus.To compensate for this reduction in the elastic limit, there are two known means.
Le premier consiste à incorporer à l'acier des éléments de microalliages; tels que du niobium ou du vanadium. Cette technique est cependant coûteuse, en raison du prix des éléments d'alliage.The first consists in incorporating microalloy elements into the steel; such as niobium or vanadium. This technique is however expensive, because of the price of the alloying elements.
Le second moyen est d'accroître la limite d'elasticité de l'acier, par une opération de déformation à froid, notamment par torsion, de la barre. Outre les frais qu'entraine également une telle opération, le gain de limite d'élasticité est réalisé au détriment de l'allongement.The second means is to increase the elastic limit of the steel, by a cold deformation operation, in particular by torsion, of the bar. In addition to the costs which such an operation also entails, the gain in elasticity limit is achieved at the expense of the elongation.
Le procédé de la présente invention prend place parmi la technique récente consistant à appliquer aux armatures à béton laminées à chaud, pendant ou immédiatement après le laminage, un refroidissement brusque, limité dans le temps, de façon à produire dans la barre une couche superficielle de martensite ; cette "trempe" est sulvier d'un refroidissement au cours duquel le coeur de la barre, c'est-à-dire la partie non atteinte par le refroidissement brusque, se transforme en ferrite et carbures. En limitant judicieusement la durée de refroidissement brusque, il est en outre possible de conserver de la chaleur dans le coeur de la barre et de créer dans la section de celle-ci un gradient de température tel qu'il se produise, au cours du dit refroidissement ultérieur, un revenu de la couche superficielle martensitique. Une telle limitation judicieuse de la durée du refroidissement brusque peut être assurée en visant une température déterminée à coeur, à la fin de la phase de refroidissement brusque; pratiquement, la conduite d'une telle opération peut être assurée en observant la température de la surface à l'endroit de la barre où l'on constate un réchauffement dû à l'apport de calories venant du coeur.The process of the present invention takes place among the recent technique consisting in applying to hot-rolled concrete reinforcements, during or immediately after rolling, a sudden cooling, limited in time, so as to produce in the bar a surface layer of martensite; this "quenching" is sulvier from cooling during from which the core of the bar, that is to say the part not affected by the sudden cooling, is transformed into ferrite and carbides. By judiciously limiting the duration of sudden cooling, it is also possible to conserve heat in the core of the bar and to create in the section thereof a temperature gradient as it occurs, during the said subsequent cooling, an income from the martensitic surface layer. Such judicious limitation of the duration of the abrupt cooling can be ensured by targeting a determined temperature at the core, at the end of the abrupt cooling phase; practically, the conduct of such an operation can be ensured by observing the temperature of the surface at the location of the bar where there is a heating due to the contribution of calories from the heart.
Un tel procédé, communément appelé "de trempe.et auto-revenu", peut théoriquement être mis en oeuvre - dans une installation déterminée aux spécifications connues pour fabriquer des armatures définies - à partir de la caractéristique constituée par la température de "coeur" à la fin de la phase de refroidissement brusque.Such a process, commonly called "quenching and self-tempering", can theoretically be implemented - in an installation determined to known specifications for manufacturing defined armatures - from the characteristic constituted by the temperature of "core" at the end of the abrupt cooling phase.
On conçoit toutefois que la réalisation de l'opération présente des difficultés différentes suivant d'une part la vitesse de défilement des produits et d'autre part leur diamètre.It is understood, however, that carrying out the operation presents different difficulties depending on the one hand on the speed of travel of the products and on the other hand their diameter.
Au stade actuel, si la fabrication de telles armatures ne pose plus aucune difficulté lorsqu'on traite des barres de 6 mm au moins de diamètre, il en est autrement sur les trains à fil fonctionnant à grande vitesse; dans une telle installation, l'utilisation de dispositifs de refroidissement intense à eau génère en effet des effets perturbateurs du déplacement du produit.At the present stage, if the manufacture of such reinforcements no longer poses any difficulty when dealing with bars of at least 6 mm in diameter, it is otherwise on wire trains operating at high speed; in such an installation, the use of intense water cooling devices generates effects that disrupt the movement of the product.
Avant de décrire l'objet de la présente invention, qui permet de résoudre le problème qui vient d'être évoqué, il est utile de rappeler brièvement que dans une installation de laminage à chaud et de traitement thermique d'un fil, il existe normalement un bloc dit "finisseur" disposé à la sortie du train de laminage intermédiaire, un dispositif de refroidissement situé à la sortie du bloc finisseur et un entraîneur, généralement à galets, pour extraire le fil de l'installation. Une telle installation est représentée schématiquement à la figure I ci-annexée.Before describing the object of the present invention, which makes it possible to solve the problem which has just been mentioned, it is useful to recall briefly that in a hot rolling and heat treatment installation for a wire, there normally exists a block called "finisher" disposed at the outlet of the intermediate rolling train, a cooling device located at the exit of the finisher and a driver, generally with rollers, to extract the wire from the installation. Such an installation is shown schematically in Figure I attached.
L'entraîneur est normalement capable d'exercer une traction de valeur T, mais pour que l'opération de laminage se déroule correctement, il convient que la traction X exercée dans le fil à l'aval du bloc finisseur soit supérieure à une valeur minimum, appropriée à l'entraînement du fil hors du bloc.The trainer is normally capable of exerting a traction of value T, but for the rolling operation to take place correctly, the traction X exerted in the wire downstream of the finishing block must be greater than a minimum value , suitable for driving the wire out of the block.
Or, la traction X, à la sortie du bloc, est en réalité la différence entre la force de traction T de l'entraîneur et la force de freinage F appliquée au fil principalement lors du passage de celui-ci dans le dispositif de refroidissement.However, the traction X, at the outlet of the block, is in reality the difference between the traction force T of the driver and the braking force F applied to the wire mainly during the passage of the latter in the cooling device.
En fait, les expériences réalisées ont permis d'établir que la force de freinage F était une fonction K de la longueur L du dispositif de refroidissement, le coefficient K étant lui-même fonction de la nature du dispositif de refroidissement, du débit de fluide de refroidissement et de la vitesse relative du fil par rapport au fluide de refroidissement.In fact, the experiments carried out have made it possible to establish that the braking force F was a function K of the length L of the cooling device, the coefficient K being itself a function of the nature of the cooling device, of the fluid flow and the relative speed of the wire relative to the coolant.
Le problème lié au train à fil est clairement apparu lorsque, en utilisant les dispositifs de refroidissement classiquement utilisés sur les trains à barres,dans des conditions capables d'assurer la trempe et l'auto-revenu du produit,la traction X s'est avérée trop faible pour que l'on puisse opérer à grande vitesse et le fil s'est systématiquement "rabou- lotté" entre la sortie du bloc finisseur et l'entrée dans le dispositif de refroidissement.The problem linked to the wire train appeared clearly when, using the cooling devices conventionally used on bar trains, under conditions capable of ensuring the quenching and self-income of the product, the traction X became found to be too weak to operate at high speed and the wire has systematically "turned up" between the exit from the finisher and the entry into the cooling device.
La présente invention a pour objet une installation perfectionnée permettant d'appliquer au fil défilant à 'grande vitesse le traitement de trempe/auto- revenu capable de lui assurer une combinaison, considérée comme optimale, de limite d'élasticité et d'allongement.The subject of the present invention is an improved installation making it possible to apply to the traveling wire at 'high speed the quenching / self-tempering treatment capable of providing it with a combination, considered to be optimal, of elastic limit and elongation.
Un premier objet de la présente invention consiste à appliquer au produit, en amont du bloc finisseur et/ou au niveau de ce bloc, un refroidissement destiné à amener la température du fil à la sortie du bloc en dessous de ce qu'elle est normalement, c'est-à-dire lorsque l'on applique un refroidissement au niveau du bloc seulement pour obtenir par exemple une température sensiblement constante dans le bloc.A first object of the present invention consists in applying to the product, upstream of the finishing block and / or at the level of this block, cooling intended to bring the temperature of the wire at the outlet of the block below what it is normally, that is to say when applying cooling at the block level only to obtain, for example, a substantially constant temperature in the block.
Ce traitement de refroidissement supplémentaire, en amont ou au niveau du bloc, a comme résultat d'augmenter la raideur du fil à la sortie du bloc, donc de réduire la traction minimum nécessaire au bon déroulement de l'opération; en outre, la longueur minimum de la rampe de refroidissement nécessaire à la trempe va être raccourcie, ce qui va diminuer la valeur de la force de freinage F.This additional cooling treatment, upstream or at the level of the block, has the result of increasing the stiffness of the wire at the outlet of the block, therefore reducing the minimum traction necessary for the smooth running of the operation; in addition, the minimum length of the cooling ramp necessary for quenching will be shortened, which will decrease the value of the braking force F.
C'est ainsi qu'une diminution de la température de fin de laminage de 1050°C jusqu'à 950°C permet de diminuer de 30 % la longueur L de trempe du fil.Thus, a decrease in the end-of-rolling temperature from 1050 ° C to 950 ° C makes it possible to reduce the wire quenching length L by 30%.
Un second objet de la présente invention consiste à utiliser un dispositif de refroidissement à faible coefficient de freinage K.A second object of the present invention consists in using a cooling device with a low braking coefficient K.
Dans une première variante préférentielle de ces dispositifs suivant l'invention, le fluide de refroidissement consiste en un mélange eau/air plus compressible et donc moins freinant que l'eau habituellement utilisée; dans ces conditions, si le coefficient K diminue effectivement, on doit cependant augmenter la longueur L nécessaire pour l'opération de trempe, étant donné que la puissance spécifique du refroidissement est abaissée; on a toutefois observé que le produit K x L, c'est-à-dire la force de freinage, était finalement moins élevée.In a first preferred variant of these devices according to the invention, the cooling fluid consists of a water / air mixture which is more compressible and therefore less braking than the water usually used; under these conditions, if the coefficient K actually decreases, the length L necessary for the quenching operation must however be increased, since the specific power of the cooling is lowered; it was however observed that the product K x L, that is to say the braking force, was ultimately lower.
Suivant une deuxième modalité préférentielle de cet objet de l'invention, on utilise des dispositifs de refroidissement munis de fentes d'injection hélicoïdales, d'un type par exemple décrit par ailleurs dans le brevet belge n° 867.299.According to a second preferred embodiment of this object of the invention, cooling devices are used provided with helical injection slots, of a type for example described elsewhere in Belgian patent n ° 867.299.
iGrâce àl'utilisation de l'un et/ou l'autre de ces dispositifs, non seulement on diminue la force de freinage, mais en outre on assure une meilleure stabilité du fil dans l'installation, ce qui réduit la valeur minimum Tmin nécessaire à la sortie du bloc finisseur.iThanks to the use of one and / or the other of these devices, not only ment reduces the braking force, but also ensures better stability of the wire in the installation, which reduces the minimum value T min required for the output of the finisher.
Un troisième objet de la présente invention consiste à augmenter la force de traction T développée par l'entraîneur.A third object of the present invention consists in increasing the traction force T developed by the trainer.
Suivant une modalité préférentielle de mise en oeuvre de cette variante, on augmente la puissance disponible dans l'entraineur; suivant une deuxième modalité, qui peut être associée à la première, on utilise plusieurs paires de galets d'entraînement, éventuellement décalées l'une par rapport à l'autre au point de vue de leur niveau, ce qui oblige le fil à parcourir dans l'entralneur une trajectoire ondulée.According to a preferred embodiment of this variant, the power available in the trainer is increased; according to a second modality, which can be associated with the first, several pairs of drive rollers are used, possibly offset with respect to each other from the point of view of their level, which obliges the thread to be traversed in the leader a wavy trajectory.
Les figures ci-annexées permettent de se rendre compte de la réalisation de l'invention.The appended figures show the realization of the invention.
Sur la figure I, sont représentés en traits pleins les éléments qui constituent l'installation habituelle de fin de laminage : dans le sens de circulation du fil, on rencontre en 1 le train intermédiaire, en 2, le bloc finisseur, en 3, le dispositif de refroidissement intense ou "canon de trempe", et en 4, l'entraîneur à galets; entre le bloc finisseur 2 et le canon 3, la traction X sur le fil est égale à la différence entre la force T exercée par l'entraîneur 4 et le freinage F subi par le fil principalement dans le canon 3.In FIG. 1, the elements which constitute the usual installation for the end of rolling are shown in solid lines: in the direction of flow of the wire, the intermediate train is encountered in 1, in 2, the finishing block, in 3, the intense cooling device or "quenching gun", and in 4, the roller drive; between the
Sur cette figure 1 sont représentés en tirets deux des perfectionnements objets de l'invention : en 6 figure un dispositif de refroidissement du fil à l'entrée du bloc finisseur tandis que des galets d'entrainement supplémentaires sont disposés en 7.In this FIG. 1 are shown in dashed lines two of the improvements which are the subject of the invention: in 6 there is shown a device for cooling the wire at the entrance to the finisher block while additional drive rollers are arranged at 7.
La figure II est une coupe longitudinale d'un dispositif de refroidissement intense eau-air qui offre la particularité d'un freinage interne peu élevé, en raison de la compressibilité du fluide qui circule dans ce dispositif. Sur cette figure II on distingue en 8 des canaux d'insufflation d'air dans la fente annulaire 9 d'injection à l'intérieur 10 du canon; l'injection du mélange eau-air se fait dans le sens de circulation du fil.Figure II is a longitudinal section of an intense water-air cooling device which offers the characteristic of low internal braking, due to the compressibility of the fluid which circulates in this device. In this figure II, 8 are distinguished air blowing channels in the annular slot 9 for injection inside the
Selon une variante intéressante de réalisation, ce dispositif est équipé de moyens pour régler sa puissance de refroidissement, par exemple pour modifier le rapport entre les débits d'eau et d'air, ou encore la température de l'eau.According to an interesting alternative embodiment, this device is equipped with means for adjusting its cooling power, for example to modify the ratio between the water and air flow rates, or even the temperature of the water.
Le procédé suivant l'invention est utilisable pour fabriquer des armatures tant lisses que crénelées, participant de façon active ou passive à la résistance de l'ouvrage en béton, utilisées éventuellement en assemblages en treillis.The method according to the invention can be used to manufacture reinforcements both smooth and crenellated, participating actively or passively in the strength of the concrete structure, possibly used in truss assemblies.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84870100T ATE62837T1 (en) | 1983-07-18 | 1984-07-10 | METHOD AND APPARATUS FOR PRODUCTION OF CONCRETE REINFORCEMENT BARS ON HIGH SPEED WIRE WIRE LINE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU84922 | 1983-07-18 | ||
| LU84922A LU84922A1 (en) | 1983-07-18 | 1983-07-18 | PROCESS AND DEVICES FOR MANUFACTURING STEEL CONCRETE REINFORCEMENTS ON HIGH SPEED WIRE TRAIN |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0132249A2 true EP0132249A2 (en) | 1985-01-23 |
| EP0132249A3 EP0132249A3 (en) | 1987-10-14 |
| EP0132249B1 EP0132249B1 (en) | 1991-04-24 |
Family
ID=19730123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84870100A Expired - Lifetime EP0132249B1 (en) | 1983-07-18 | 1984-07-10 | Process and device to produce concrete reinforcement bars on a high speed wire mill |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4625532A (en) |
| EP (1) | EP0132249B1 (en) |
| JP (1) | JPS60155623A (en) |
| KR (1) | KR920000232B1 (en) |
| AT (1) | ATE62837T1 (en) |
| AU (1) | AU580960B2 (en) |
| CA (1) | CA1245080A (en) |
| DE (1) | DE3484488D1 (en) |
| ES (1) | ES534386A0 (en) |
| GB (1) | GB2143452B (en) |
| LU (1) | LU84922A1 (en) |
| ZA (1) | ZA845522B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0312843A1 (en) * | 1987-10-22 | 1989-04-26 | Sms Schloemann-Siemag Aktiengesellschaft | Process for heat exchange and its use in the controlled cooling of rolled products |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3518925A1 (en) * | 1985-05-25 | 1986-11-27 | Kocks Technik Gmbh & Co, 4010 Hilden | METHOD FOR THE CONTROLLED ROD AND WIRE ROLLING OF ALLOY STEELS |
| IT1235120B (en) * | 1989-07-10 | 1992-06-18 | Danieli Off Mecc | FAST LAMINATION PROCEDURE AND FAST LAMINATION SYSTEM. |
| IT1235119B (en) * | 1989-07-10 | 1992-06-18 | Danieli Off Mecc | LAMINATION CAGE WITH MULTIPLE ROLLER ROLLERS FOR FAST LAMINATION. |
| DE4207296A1 (en) * | 1992-03-07 | 1993-09-09 | Schloemann Siemag Ag | FINE STEEL / WIRE ROAD |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756169A (en) * | 1950-10-19 | 1956-07-24 | John A Roebling S Sons Corp | Method of heat treating hot rolled steel rods |
| GB1162859A (en) * | 1966-04-29 | 1969-08-27 | Demag Ag | Rolling Mill Plant for the production of Wire |
| FR1584095A (en) * | 1968-07-10 | 1969-12-12 | ||
| FR2123187A1 (en) * | 1971-01-21 | 1972-09-08 | Uk G | |
| FR2251384A1 (en) * | 1973-11-15 | 1975-06-13 | Bethlehem Steel Corp | |
| DE2437684A1 (en) * | 1974-08-05 | 1976-02-26 | Schloemann Siemag Ag | Hot-rolling mill train for the high speed mfr. - of either wire, or ribbed steel for reinforcing concrete |
| US4222257A (en) * | 1977-04-21 | 1980-09-16 | Hamburger Stahlwerke Gmbh | Method of manufacturing rolled wire rod |
| EP0021884A1 (en) * | 1979-06-07 | 1981-01-07 | INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France | Apparatus for cooling elongate hot rolled products |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5110917B2 (en) * | 1972-06-16 | 1976-04-07 | ||
| AR206397A1 (en) * | 1973-02-22 | 1976-07-23 | Hudswell Morrice Ltd | APPARATUS TO MAKE A DITCH IN THE FLOOR |
| IT1090143B (en) * | 1975-01-29 | 1985-06-18 | Centre Rech Metallurgique | PROCESS FOR MANUFACTURING LAMINATED STEEL PRODUCTS |
| BE837884A (en) * | 1976-01-23 | 1976-05-14 | Centre Rech Metallurgique | IMPROVEMENTS TO COOLING SYSTEMS FOR METAL PROFILES |
| BE867299A (en) * | 1978-05-19 | 1978-09-18 | Centre Rech Metallurgique | IMPROVEMENTS TO COOLING DEVICES FOR EXTENDED METAL PRODUCTS |
-
1983
- 1983-07-18 LU LU84922A patent/LU84922A1/en unknown
-
1984
- 1984-07-10 DE DE8484870100T patent/DE3484488D1/en not_active Expired - Lifetime
- 1984-07-10 EP EP84870100A patent/EP0132249B1/en not_active Expired - Lifetime
- 1984-07-10 AT AT84870100T patent/ATE62837T1/en not_active IP Right Cessation
- 1984-07-16 KR KR1019840004193A patent/KR920000232B1/en not_active IP Right Cessation
- 1984-07-17 AU AU30772/84A patent/AU580960B2/en not_active Ceased
- 1984-07-17 ES ES534386A patent/ES534386A0/en active Granted
- 1984-07-17 CA CA000459009A patent/CA1245080A/en not_active Expired
- 1984-07-17 ZA ZA845522A patent/ZA845522B/en unknown
- 1984-07-17 US US06/631,787 patent/US4625532A/en not_active Expired - Fee Related
- 1984-07-17 JP JP59149285A patent/JPS60155623A/en active Granted
- 1984-07-18 GB GB08418285A patent/GB2143452B/en not_active Expired
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756169A (en) * | 1950-10-19 | 1956-07-24 | John A Roebling S Sons Corp | Method of heat treating hot rolled steel rods |
| GB1162859A (en) * | 1966-04-29 | 1969-08-27 | Demag Ag | Rolling Mill Plant for the production of Wire |
| FR1584095A (en) * | 1968-07-10 | 1969-12-12 | ||
| FR2123187A1 (en) * | 1971-01-21 | 1972-09-08 | Uk G | |
| FR2251384A1 (en) * | 1973-11-15 | 1975-06-13 | Bethlehem Steel Corp | |
| DE2437684A1 (en) * | 1974-08-05 | 1976-02-26 | Schloemann Siemag Ag | Hot-rolling mill train for the high speed mfr. - of either wire, or ribbed steel for reinforcing concrete |
| US4222257A (en) * | 1977-04-21 | 1980-09-16 | Hamburger Stahlwerke Gmbh | Method of manufacturing rolled wire rod |
| EP0021884A1 (en) * | 1979-06-07 | 1981-01-07 | INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France | Apparatus for cooling elongate hot rolled products |
Non-Patent Citations (1)
| Title |
|---|
| STEEL IN THE USSR, vol. 9, no. 3, mars 1979, pages 126-129, Londres, GB; N.G. BOCHKOV et al.: "Production of periodic-section reinforcing rod in coil with high dimensional accuracy and improved mechanical properties" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0312843A1 (en) * | 1987-10-22 | 1989-04-26 | Sms Schloemann-Siemag Aktiengesellschaft | Process for heat exchange and its use in the controlled cooling of rolled products |
Also Published As
| Publication number | Publication date |
|---|---|
| LU84922A1 (en) | 1985-04-17 |
| CA1245080A (en) | 1988-11-22 |
| ES8505726A1 (en) | 1985-06-01 |
| GB2143452A (en) | 1985-02-13 |
| GB2143452B (en) | 1987-07-08 |
| US4625532A (en) | 1986-12-02 |
| JPS60155623A (en) | 1985-08-15 |
| JPH0557331B2 (en) | 1993-08-23 |
| ATE62837T1 (en) | 1991-05-15 |
| EP0132249A3 (en) | 1987-10-14 |
| EP0132249B1 (en) | 1991-04-24 |
| KR850001037A (en) | 1985-03-14 |
| AU3077284A (en) | 1985-01-24 |
| KR920000232B1 (en) | 1992-01-10 |
| AU580960B2 (en) | 1989-02-09 |
| ZA845522B (en) | 1985-03-27 |
| DE3484488D1 (en) | 1991-05-29 |
| ES534386A0 (en) | 1985-06-01 |
| GB8418285D0 (en) | 1984-08-22 |
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