EP1345712B1 - Method for real-time adjustment of a planisher - Google Patents

Method for real-time adjustment of a planisher Download PDF

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Publication number
EP1345712B1
EP1345712B1 EP01272062A EP01272062A EP1345712B1 EP 1345712 B1 EP1345712 B1 EP 1345712B1 EP 01272062 A EP01272062 A EP 01272062A EP 01272062 A EP01272062 A EP 01272062A EP 1345712 B1 EP1345712 B1 EP 1345712B1
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EP
European Patent Office
Prior art keywords
plate
planished
planishing
planisher
strip
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EP01272062A
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German (de)
French (fr)
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EP1345712A1 (en
Inventor
Jacques-Yves Bourgon
Olivier Guillard
Fabrice Tondo
Olivier Madelaine-Dupuich
Pierre Lemoine
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USINOR SA
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USINOR SA
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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
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the present invention relates to a method for regulating time real a leveler intended to plan metal strips in reel or in coil, such as steel strips or directly plates or sheets, according to the preamble of claim 1, as well as an installation leveling according to the preamble of claim 4.
  • the invention applies on the one hand to the leveling of metal strips intended to be cut out of the leveler, so as to obtain plates or sheets of a determined length L, and on the other hand at planing plates or sheets.
  • a metal strip or a plate undergoes various operations, such as that hot rolling and cold rolling, intended to give it uniform dimensional characteristics over its entire length; so a laminated metal strip theoretically has a thickness at all points and a constant width.
  • the rolling operation is not sufficient to obtain a strip free from defects. Indeed, it may have flatness defects such as ripples at the edges or in the center, and a hanger (this is say a curvature) depending on the length or width of the strip.
  • a leveler consists of two cassettes superimposed each supporting several motorized rollers, offset relative to each other, and arranged alternately above and in below the course of the strip.
  • a tape reel metallic In the case of a tape reel metallic, it is unwound beforehand, generally straightened in a straightener before undergoing the leveling operation.
  • planed strips In order to deliver products that meet the flatness criteria required by manufacturers, planed strips are not rewound, in fact the winding destroys the flatness. They are therefore cut, at the exit of the leveler, so as to obtain plates, sheets or blanks, either by shears guillotine, either by means of a follower, rotary or flying shear. The plates or planed sheets then transported to a stacker, and are stacked pending delivery.
  • the leveling proper is carried out by passing the strip or the plate between the offset rollers of the leveler, whose tightening is adjusted by entry, i.e. the spacing of the rollers upstream of the leveler, and outlet, i.e. the spacing of the rollers downstream of the leveler.
  • entry i.e. the spacing of the rollers upstream of the leveler
  • outlet i.e. the spacing of the rollers downstream of the leveler.
  • the adjustment of the tightening parameters at the input and output of the leveler is carried out each time the reel, plate (or sheet), in order to adapt these parameters not only to the characteristics dimensional and types of tape or plate defects, but also depending on the hanger, depending on the shape you want to print on the plate (or sheet) after planing.
  • the plates will be delivered with a null hanger (plate perfectly flat), a positive hanger or a negative hanger.
  • a known means for adjusting the rollers of the leveler at the outlet consists in checking the residual hanger of the plate (or sheet) after planing.
  • the plate is raised by means of a lifter so that that the plate is suspended by one or two support points, then an operator measure the hanger of the plate by raising the arrow in the center of the plate to using a ruler. The operator can then adjust the tightening setting of the output rollers to correct the plate hanger and adapt it to demand from the industrialist. This measurement operation is repeated as many times as necessary for each change of product (in the form of a reel, plate or sheet).
  • the control of the residual hanger of the plate is an operation important insofar as the tolerances required by manufacturers, concerning the dimensions and the hanger of the plate, are more and more narrow.
  • the tolerances concerning the hanger of plates intended for LASER cutting, and for certain applications automotive, such as connecting parts are often less than ⁇ 3 mm / m.
  • the object of the present invention is to remedy the drawbacks of the method used in the prior art.
  • the invention also relates to a leveling installation of the type comprising a leveler for leveling metal strips, plates or sheets comprising, means for cutting, after planing, the strip in planed sheets or in planed sheets, characterized in that it comprises means for measuring the residual bend of the planed plates or planed sheets resulting either from the planing of the cut strip, or from the planing of the plate or of the sheet, at the outlet of the leveler, and means for modifying the tightening rollers located at the outlet of said leveler according to the indications supplied by the measuring means of said residual hanger.
  • the invention consists in performing a measurement in real time from the hanger of the plate or from the strip cut into a plate at its exit from the leveler, and to control the clamping of the rollers according to the results of this measurement.
  • FIG 1 there is shown schematically a leveler 1, of two 2,3 superimposed cassettes supporting 4 motorized rollers, positioned offset from each other, and between which a metal strip 5, a plate or sheet.
  • the installation includes cutting means 6 arranged at the leveler exit, a transport table 7, a means of conveying the strip cut into plates (not shown on the face).
  • the installation includes cutting means 6 arranged at the leveler exit
  • the cutting means 6 are superfluous when one directly planes plates or sheets; however, they may be present in the installation and in this case they are not operated.
  • the metal strip or plate 5 is planed in the leveler 1 by scrolling between the rollers 4.
  • the strip 5 is sheared by the cutting means 6 consisting either of a guillotine shears, or of a rotary, follower, or flying shear, so as to obtain plates 8, sheets or blanks of a length L determined in advance.
  • the cutting means 6 consisting either of a guillotine shears, or of a rotary, follower, or flying shear, so as to obtain plates 8, sheets or blanks of a length L determined in advance.
  • a part of the planed plate 8 rests on the transport table 7, while a length of plate L'determined in advance by a detection cell 10 exceeds the table 7 and is therefore outside the support zone.
  • the measurements made by the sensors 9 are preferably non-contact distance measurements to avoid distorting the measurement of the curvature of the plate part 8 of length L ′.
  • non-contact distance sensors 9 such as current sensors Eddy or optical sensors ...
  • the transfer function is calculated which then makes it possible to adjust the clamping at the outlet (rollers 4a and 4b) of the leveler 1, so as to adapt the hanger of the following plate 8 to the request of the manufacturer.
  • the hanger of plate 8 required by the manufacturer may be zero (plate perfectly flat), positive (curvature of the plate up) or negative (curvature of the plate down). To obtain plates with one of these profiles, either loosen or tighten the spacing of the rollers 4a with respect to rollers 4b located at the leveler exit 1.
  • This operation can be carried out by an operator who collects the different measures mentioned above, calculates using these measures the transfer function allowing to deduce the tightening parameters in exit of the rollers 4a and 4b to be injected into the regulation system 11 according to the hanger you want to apply to the plate.
  • the actuator 12 acts directly on the clamping of the rollers 4a and 4b at the outlet leveler 1, ie on their relative spacing.
  • the method according to the invention thus makes it possible to control in real time the hanger of each of the plates 8.
  • real-time control of the hanger of the plate 8 makes it possible to act immediately on the tightening parameters in leveler output 1 and modify, if necessary, the tightening settings at the outlet (rollers 4a and 4b), so as to obtain plates 8, the hanger is constant, or whose value of the hanger remains within the limit of tolerance set by the manufacturer.
  • Figure 2 shows the variation in the value of the residual hanger (expressed in mm / m) as a function of the tightness of the rollers at the exit from the leveler (expressed in mm).
  • the material considered is a steel strip 6 mm thick, 1500 mm wide and elastic limit of 350 Mpa.
  • the initial plasticization rate of the band is 60%.
  • the maximum plasticization rate targeted for this example is 80%. This imposed plasticization rate depends on the strategy leveling used and the initial flatness of the strip before leveling. The amplitude of the hanger variations after leveling is directly correlated to this parameter.
  • Example 1 the contactless distance sensors measure a hanger residual of the plate obtained after planing and shearing of the steel strip of + 7mm / m. So that the hanger of this plate is zero (plate perfectly plane), the regulation system (a) must correct the tightening of the rollers at the exit from the leveler by a correction of 0.15 mm so that the tightening reaches 0.32 mm.
  • Example 2 the contactless distance sensors measure a hanger residual of the plate obtained after planing and shearing of the steel strip of -7mm / m. So that the hanger of this plate is zero (plate perfectly plane), the regulation system (a ') must correct the tightening of the rollers at the exit from the leveler by a correction of 0.2 mm so that the tightening reaches 0.32 mm.

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Abstract

A method for real-time adjustment of a planisher for planishing metal strip. After a planished strip has been cut into a plate, the method includes measuring the plate at the output of the planisher outside a support zone, correcting the measurement so as to eliminate the influence due to self-weight of the plate, and correcting, as the case may be, the clamping of rollers located at the planer output so as to obtain a plate with a controlled curve.

Description

La présente invention est relative à un procédé pour réguler en temps réel une planeuse destinée à planer des bandes métalliques en bobine ou en coil, telles que des bandes d'acier ou directement des plaques ou des feuilles, selon le préambule de la revendication 1, aussi bien qu'une installation de planage selon le préambule de la revendication 4.The present invention relates to a method for regulating time real a leveler intended to plan metal strips in reel or in coil, such as steel strips or directly plates or sheets, according to the preamble of claim 1, as well as an installation leveling according to the preamble of claim 4.

L'invention s'applique d'une part au planage des bandes métalliques destinées à être découpées en sortie de planeuse, de manière à obtenir des plaques ou des feuilles d'une longueur déterminée L, et d'autre part au planage des plaques ou des feuilles.The invention applies on the one hand to the leveling of metal strips intended to be cut out of the leveler, so as to obtain plates or sheets of a determined length L, and on the other hand at planing plates or sheets.

Une bande métallique ou une plaque subit diverses opérations, telles que le laminage à chaud et le laminage à froid, destinées à lui conférer des caractéristiques dimensionnelles homogènes sur toute sa longueur ; ainsi une bande métallique laminée possède théoriquement en tout point une épaisseur et une largeur constante.A metal strip or a plate undergoes various operations, such as that hot rolling and cold rolling, intended to give it uniform dimensional characteristics over its entire length; so a laminated metal strip theoretically has a thickness at all points and a constant width.

Cependant l'opération de laminage ne suffit pas pour obtenir une bande exempte de défaut. En effet, celle-ci peut présenter des défauts de planéité tels que des ondulations au niveau des rives ou du centre, et un cintre (c'est à dire une courbure) selon la longueur ou la largeur de la bande.However, the rolling operation is not sufficient to obtain a strip free from defects. Indeed, it may have flatness defects such as ripples at the edges or in the center, and a hanger (this is say a curvature) depending on the length or width of the strip.

Ces défauts de planéité sont corrigés par planage de la bande dans une planeuse. Une telle planeuse est constituée de deux cassettes superposées supportant chacune plusieurs rouleaux motorisés, décalés les uns par rapport aux autres, et disposés en alternance au-dessus et en dessous du parcours de la bande. Dans le cas d'une bobine de bande métallique, celle-ci est préalablement débobinée, en général redressée dans une redresseuse avant de subir l'opération de planage. Afin de livrer des produits répondant aux critères de planéité exigés par les industriels, les bandes planées ne sont pas re-bobinées, en effet le bobinage détruit la planéité. Elles sont donc découpées, en sortie de la planeuse, de manière à obtenir des plaques, des feuilles ou des flans, soit au moyen d'une cisaille guillotine, soit au moyen d'une cisaille suiveuse, rotative ou volante. Les plaques ou les feuilles planées ensuite transportées vers une empileuse, et sont empilées en attendant leur livraison. These flatness defects are corrected by leveling the strip in a leveler. Such a leveler consists of two cassettes superimposed each supporting several motorized rollers, offset relative to each other, and arranged alternately above and in below the course of the strip. In the case of a tape reel metallic, it is unwound beforehand, generally straightened in a straightener before undergoing the leveling operation. In order to deliver products that meet the flatness criteria required by manufacturers, planed strips are not rewound, in fact the winding destroys the flatness. They are therefore cut, at the exit of the leveler, so as to obtain plates, sheets or blanks, either by shears guillotine, either by means of a follower, rotary or flying shear. The plates or planed sheets then transported to a stacker, and are stacked pending delivery.

Le planage proprement dit est réalisé par passage de la bande ou de la plaque entre les rouleaux décalés de la planeuse, dont on règle le serrage en entrée, c'est à dire l'écartement des rouleaux amont de la planeuse, et en sortie, c'est à dire l'écartement des rouleaux aval de la planeuse. En entrée de la planeuse on homogénéise les contraintes résiduelles de la bande, et on remédie ainsi aux défauts de planéité tels que les ondulations et le cintrage selon la largeur. En sortie de la planeuse, on traite le cintrage selon la longueur de la bande. Pour plus de clarté dans la suite du texte, lorsqu'on signifiera "cintre selon la longueur", on se contentera de mentionner "cintre".The leveling proper is carried out by passing the strip or the plate between the offset rollers of the leveler, whose tightening is adjusted by entry, i.e. the spacing of the rollers upstream of the leveler, and outlet, i.e. the spacing of the rollers downstream of the leveler. At the entrance of the leveler we homogenize the residual stresses of the strip, and we thus remedy flatness defects such as undulations and bending depending on the width. At the exit of the leveler, we process the bending according to the length of the strip. For clarity in the rest of the text, when will mean "hanger according to the length", we will just mention "hanger".

Le réglage des paramètres de serrage en entrée et en sortie de la planeuse est effectué lors de chaque changement de bobine, de plaque (ou de feuille), afin d'adapter ces paramètres non seulement aux caractéristiques dimensionnelles et aux types de défauts de la bande ou de la plaque, mais aussi en fonction du cintre, selon la forme qu'on souhaite imprimer à la plaque (ou à la feuille) après planage.The adjustment of the tightening parameters at the input and output of the leveler is carried out each time the reel, plate (or sheet), in order to adapt these parameters not only to the characteristics dimensional and types of tape or plate defects, but also depending on the hanger, depending on the shape you want to print on the plate (or sheet) after planing.

En effet, selon l'application à laquelle les industriels destinent ces plaques (ou feuilles) planées, ou encore en fonction du type d'installation que possèdent ces industriels, les plaques seront livrées avec un cintre nul (plaque parfaitement plane), un cintre positif ou un cintre négatif.Indeed, depending on the application to which the manufacturers intend these plates (or sheets) planed, or depending on the type of installation that have these manufacturers, the plates will be delivered with a null hanger (plate perfectly flat), a positive hanger or a negative hanger.

On effectue d'abord le réglage du serrage des rouleaux de la planeuse en entrée selon des méthodes connues en elles-mêmes, puis on règle le serrage des rouleaux en sortie.We first adjust the tightness of the leveling rollers as input according to methods known in themselves, then we adjust the tightening of the rollers at the outlet.

Un moyen connu pour régler les rouleaux de la planeuse en sortie consiste à contrôler le cintre résiduel de la plaque (ou de la feuille) après planage. A cet effet, on lève la plaque au moyen d'un releveur de manière à ce que la plaque soit suspendue par un ou deux points d'appui, puis un opérateur mesure le cintre de la plaque en relevant la flèche au centre de la plaque à l'aide d'une règle. L'opérateur peut ensuite ajuster le réglage du serrage des rouleaux en sortie pour corriger le cintre de la plaque et l'adapter à la demande de l'industriel. Cette opération de mesure est renouvelée autant de fois que nécessaire lors de chaque changement de produit (sous la forme de bobine, de plaque ou de feuille).A known means for adjusting the rollers of the leveler at the outlet consists in checking the residual hanger of the plate (or sheet) after planing. For this purpose, the plate is raised by means of a lifter so that that the plate is suspended by one or two support points, then an operator measure the hanger of the plate by raising the arrow in the center of the plate to using a ruler. The operator can then adjust the tightening setting of the output rollers to correct the plate hanger and adapt it to demand from the industrialist. This measurement operation is repeated as many times as necessary for each change of product (in the form of a reel, plate or sheet).

Cette technique présente divers inconvénients suivants :

  • la mesure du cintre d'une plaque lors du changement de produit et l'adaptation du serrage des rouleaux en sortie par l'opérateur imposent de stopper la ligne de planage pendant cette opération, d'où une perte de productivité ;
  • certaines lignes de planage sont compactes, et il n'est pas toujours possible d'y implanter un dispositif de levage des plaques ; dans ce cas la mesure du cintre de la plaque est effectuée hors ligne avec un temps d'arrêt de la ligne plus important encore ;
  • l'opération de levage de la plaque peut comporter des risques pour la sécurité de l'opérateur, notamment pour les plaques de grandes dimensions (supérieures à 2 m de long).
This technique has the following drawbacks:
  • the measurement of the hanger of a plate when changing the product and the adaptation of the clamping of the rollers at the outlet by the operator means that the leveling line must be stopped during this operation, resulting in a loss of productivity;
  • certain leveling lines are compact, and it is not always possible to install a plate lifting device there; in this case the measurement of the hanger of the plate is carried out offline with an even longer line downtime;
  • the plate lifting operation may involve risks for the safety of the operator, in particular for large plates (greater than 2 m in length).

En outre, si les caractéristiques dimensionnelles d'une bande d'une bobine donnée sont constantes sur toute sa longueur, il n'en est pas de même en ce qui concerne les caractéristiques mécaniques. Or les variations des caractéristiques mécaniques d'une bande ont un impact négatif sur la maítrise du cintre final des plaques après planage de la bande. En effet le serrage des rouleaux en sortie de planeuse ayant été réglé pour une caractéristique mécanique donnée de la bande, ce serrage, au cours du planage, ne sera plus adapté si les caractéristiques mécaniques de la bande varient de façon importante.In addition, if the dimensional characteristics of a strip of a given coil are constant over its entire length, it is not the same with regard to mechanical characteristics. However, variations in mechanical characteristics of a strip have a negative impact on control of the final hanger of the plates after leveling the strip. Indeed the tightening of rollers leaving the leveler having been adjusted for a characteristic given mechanical strength of the strip, this tightening, during leveling, will no longer be suitable if the mechanical characteristics of the strip vary important.

Or la maítrise du cintre résiduel de la plaque est une opération importante dans la mesure où les tolérances exigées par les industriels, concernant les dimensions et le cintre de la plaque, sont de plus en plus étroites. A titre indicatif, actuellement, les tolérances concernant le cintre des plaques destinées à la découpe LASER, et pour certaines applications automobile telles que les pièces de liaison, sont souvent inférieures à ± 3 mm/m. La présente invention a pour but de remédier aux inconvénients de la méthode utilisée dans l'art antérieur.However the control of the residual hanger of the plate is an operation important insofar as the tolerances required by manufacturers, concerning the dimensions and the hanger of the plate, are more and more narrow. As an indication, currently, the tolerances concerning the hanger of plates intended for LASER cutting, and for certain applications automotive, such as connecting parts, are often less than ± 3 mm / m. The object of the present invention is to remedy the drawbacks of the method used in the prior art.

L'invention a donc pour objet un procédé pour réguler en temps réel une planeuse destinée à planer des bandes métalliques, des plaques, ou des feuilles, dans lequel
   après avoir plané ladite bande, on la découpe pour obtenir, une plaque, ou une feuille; caractérisé en ce que:

  • on mesure la courbure de ladite plaque issue soit du planage de la bande découpée, soit du planage de la plaque, en sortie de ladite planeuse hors d'une zone d'appui ;
  • on corrige ladite mesure de manière à éliminer l'influence due au poids propre de la plaque; et
  • on corrige, le cas échéant, le serrage des rouleaux situés en sortie de ladite planeuse de manière à obtenir une plaque de cintre contrôlé.
The subject of the invention is therefore a method for regulating in real time a leveler intended for leveling metal strips, plates, or sheets, in which
after having leveled said strip, it is cut to obtain a plate or a sheet; characterized in that:
  • measuring the curvature of said plate originating either from the leveling of the cut strip, or from the leveling of the plate, at the outlet of said leveler outside of a support zone;
  • correcting said measurement so as to eliminate the influence due to the self-weight of the plate; and
  • correcting, if necessary, the tightening of the rollers located at the outlet of said leveler so as to obtain a controlled hanger plate.

Selon d'autres caractéristiques préférées de l'invention :

  • la mesure du cintre résiduel de la plaque planée est réalisée à partir d'une mesure de la courbure de ladite plaque en sortie de la planeuse hors de ladite zone d'appui, ladite mesure étant effectuée au moyen d'au moins trois capteurs de distance.
  • la mesure du cintre résiduel de la plaque planée est déduite de la courbure mesurée et de la courbure propre de la plaque planée.
According to other preferred characteristics of the invention:
  • the measurement of the residual bend of the planed plate is carried out on the basis of a measurement of the curvature of said plate at the outlet of the leveler outside said support zone, said measurement being carried out by means of at least three distance sensors .
  • the measurement of the residual bend of the planed plate is deduced from the measured curvature and from the proper curvature of the planed plate.

L'invention a également pour objet une installation de planage du type comprenant une planeuse pour planer des bandes métalliques, des plaques ou des feuilles comportant, des moyens pour découper, après planage, la bande en plaques planées ou en feuilles planées caractérisé en ce qu'elle comprend des moyens de mesure du cintre résiduel des plaques planées ou feuilles planées issues soit du planage de la bande découpée, soit du planage de la plaque ou de la feuille, en sortie de la planeuse, et des moyens pour modifier le serrage des rouleaux situés en sortie de ladite planeuse en fonction des indications fournies par les moyens de mesure dudit cintre résiduel.The invention also relates to a leveling installation of the type comprising a leveler for leveling metal strips, plates or sheets comprising, means for cutting, after planing, the strip in planed sheets or in planed sheets, characterized in that it comprises means for measuring the residual bend of the planed plates or planed sheets resulting either from the planing of the cut strip, or from the planing of the plate or of the sheet, at the outlet of the leveler, and means for modifying the tightening rollers located at the outlet of said leveler according to the indications supplied by the measuring means of said residual hanger.

Selon d'autres caractéristiques préférées de l'invention :

  • les moyens de mesure du cintre résiduel comportent au moins trois capteurs de distance tels que des capteurs de distance optiques, ou des capteurs de distance à courant de Foucault.
  • l'installation de planage comprend des moyens automatiques pour régler le serrage des rouleaux de sortie en fonction des indications des mesures de distances des capteurs.
  • la mesure de la courbure de la plaque planée est réalisée au niveau de ladite plaque planée hors d'une zone d'appui.
According to other preferred characteristics of the invention:
  • the means for measuring the residual hanger comprise at least three distance sensors such as optical distance sensors, or eddy current distance sensors.
  • the leveling installation includes automatic means for adjusting the tightening of the output rollers according to the indications of the distance measurements from the sensors.
  • the curvature of the planed plate is measured at said planed plate outside a support zone.

Comme on l'aura compris, l'invention consiste à exécuter une mesure en temps réel du cintre de la plaque ou de la bande découpée en plaque à sa sortie de la planeuse, et à commander le serrage des rouleaux en fonction des résultats de cette mesure.As will be understood, the invention consists in performing a measurement in real time from the hanger of the plate or from the strip cut into a plate at its exit from the leveler, and to control the clamping of the rollers according to the results of this measurement.

Les caractéristiques et avantages de l'invention apparaítront à la lecture de la description qui va suivre, donnée à titre d'exemple et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue schématique en coupe transversale d'une planeuse ;
  • la figure 2 montre la variation de la valeur du cintre résiduel en fonction du serrage des rouleaux en sortie de planeuse.
The characteristics and advantages of the invention will appear on reading the description which follows, given by way of example and made with reference to the appended drawings in which:
  • Figure 1 is a schematic cross-sectional view of a leveler;
  • FIG. 2 shows the variation in the value of the residual hanger as a function of the tightening of the rollers at the exit from the leveler.

Sur la figure 1, on a représenté schématiquement une planeuse 1, de deux cassettes 2,3 superposées supportant des rouleaux 4 motorisés, positionnés de manière décalée les uns par rapport aux autres, et entre lesquels défile une bande métallique 5, une plaque ou une feuille. L'installation comprend des moyens de découpe 6 disposés en sortie de planeuse, une table de transport 7, un moyen de convoyage de la bande découpée en plaques (non représenté sur la figure). Dans le cas du planage de bandes, l'installation comprend des moyens de découpe 6 disposés en sortie de planeuse Bien entendu, les moyens de découpe 6 sont superflus lorsque qu'on plane directement des plaques ou des feuilles ; cependant, ils peuvent être présents dans l'installation et dans ce cas on ne les fait pas fonctionner. En 8, on a représenté la plaque ou la feuille (soit issue du cisaillage de la bande après planage, soit issue de la plaque ou de la feuille planée) dont une partie est en appui sur la table 7 et l'autre partie dépasse hors de la table 7. Des capteurs de distance placés, sur notre schéma, en dessous de la zone de la plaque planée 8 non supportée par la table 7, sont reliés à un système de régulation 11 du serrage des rouleaux 4a et 4b situés en sortie de la planeuse, lui-même relié à un actionneur 12 de commande du serrage en sortie (rouleaux 4a et 4b).In Figure 1, there is shown schematically a leveler 1, of two 2,3 superimposed cassettes supporting 4 motorized rollers, positioned offset from each other, and between which a metal strip 5, a plate or sheet. The installation includes cutting means 6 arranged at the leveler exit, a transport table 7, a means of conveying the strip cut into plates (not shown on the face). In the case of strip leveling, the installation includes cutting means 6 arranged at the leveler exit Of course, the cutting means 6 are superfluous when one directly planes plates or sheets; however, they may be present in the installation and in this case they are not operated. In 8, we have represented the plate or sheet (either from the shearing of the strip after leveling, either from the plate or the planed sheet) part of which is support on table 7 and the other part protrudes out of table 7. Sensors distance placed, on our diagram, below the plate area 8 not supported by table 7, are connected to a regulation system 11 of the clamping of the rollers 4a and 4b located at the outlet of the leveler, itself connected to an actuator 12 for controlling the clamping at the outlet (rollers 4a and 4b).

La bande ou la plaque métallique 5 est planée dans la planeuse 1 par défilement entre les rouleaux 4. En sortie de planeuse, la bande 5 est cisaillée par les moyens de découpe 6 constitués soit d'une cisaille guillotine, soit d'une cisaille rotative, suiveuse, ou volante, de manière à obtenir des plaques 8, des feuilles ou des flans d'une longueur L déterminée à l'avance. Une partie de la plaque planée 8 repose sur la table de transport 7, tandis qu'une longueur de plaque L'déterminée à l'avance par une cellule de détection 10 dépasse de la table 7 et se trouve donc hors de la zone d'appui.The metal strip or plate 5 is planed in the leveler 1 by scrolling between the rollers 4. At the exit from the leveler, the strip 5 is sheared by the cutting means 6 consisting either of a guillotine shears, or of a rotary, follower, or flying shear, so as to obtain plates 8, sheets or blanks of a length L determined in advance. A part of the planed plate 8 rests on the transport table 7, while a length of plate L'determined in advance by a detection cell 10 exceeds the table 7 and is therefore outside the support zone.

Au moins trois capteurs 9, disposés sur un socle de référence (non représenté sur la figure) positionné soit au-dessus, soit en dessous de la zone correspondant à la longueur L' de la plaque 8, mesurent la distance qui les sépare de ladite partie de plaque 8 de longueur L' de manière à en déterminer la courbure C. Les mesures réalisées par les capteurs 9 sont de préférence des mesures de distance sans contact afin d'éviter de fausser les mesures de la courbure de la partie de plaque 8 de longueur L'. On utilisera donc des capteurs de distance 9 sans contact tels que des capteurs à courant de Foucault ou des capteurs optiques...At least three sensors 9, arranged on a reference base (not shown in the figure) positioned either above or below the area corresponding to the length L ′ of the plate 8, measure the distance which separates from said plate portion 8 of length L ′ so as to determine therefrom the curvature C. The measurements made by the sensors 9 are preferably non-contact distance measurements to avoid distorting the measurement of the curvature of the plate part 8 of length L ′. We will therefore use non-contact distance sensors 9 such as current sensors Eddy or optical sensors ...

Afin de déterminer le cintre résiduel Cr de la plaque 8 à partir de la courbure C mesurée, il convient de tenir compte de la courbure Cp de la plaque 8 due à son poids propre. La connaissance des paramètres suivants :

  • longueur L' de la plaque 8 qui dépasse hors de la table 7, déterminée par une cellule de position 10,
  • épaisseur de la plaque 8,
  • distance des capteurs 9 par rapport à la table 7,
permettent de calculer la courbure Cp de la plaque 8 due à son poids propre. Ainsi en retranchant la valeur de la courbure Cp à la valeur de la courbure C mesurée on obtient aisément le cintre résiduel Cr de la plaque 8.In order to determine the residual arch C r of the plate 8 from the curvature C measured, account should be taken of the curvature C p of the plate 8 due to its own weight. Knowledge of the following parameters:
  • length L ′ of the plate 8 which protrudes outside the table 7, determined by a position cell 10,
  • thickness of plate 8,
  • distance of the sensors 9 from the table 7,
used to calculate the curvature C p of the plate 8 due to its self-weight. Thus by subtracting the value of the curvature C p from the value of the curvature C measured, the residual arch C r of the plate 8 is easily obtained.

Connaissant le cintre résiduel Cr de la plaque 8, on calcule la fonction de transfert qui permet ensuite d'ajuster le serrage en sortie (rouleaux 4a et 4b) de la planeuse 1, de manière à adapter le cintre de la plaque suivante 8 à la demande de l'industriel.Knowing the residual hanger C r of the plate 8, the transfer function is calculated which then makes it possible to adjust the clamping at the outlet (rollers 4a and 4b) of the leveler 1, so as to adapt the hanger of the following plate 8 to the request of the manufacturer.

Le cintre de la plaque 8 exigé par l'industriel peut être nul (plaque parfaitement plane), positif (courbure de la plaque vers le haut) ou négatif (courbure de la plaque vers le bas). Pour obtenir des plaques possédant un de ces profils, il convient soit de desserrer, soit de resserrer l'écartement des rouleaux 4a par rapport aux rouleaux 4b situés en sortie de planeuse 1. The hanger of plate 8 required by the manufacturer may be zero (plate perfectly flat), positive (curvature of the plate up) or negative (curvature of the plate down). To obtain plates with one of these profiles, either loosen or tighten the spacing of the rollers 4a with respect to rollers 4b located at the leveler exit 1.

Cette opération peut être effectuée par un opérateur qui recueille les différentes mesures évoquées précédemment, calcule à l'aide de ces mesures la fonction de transfert permettant de déduire les paramètres de serrage en sortie des rouleaux 4a et 4b à injecter dans le système de régulation 11 selon le cintre qu'on souhaite appliquer à la plaque.This operation can be carried out by an operator who collects the different measures mentioned above, calculates using these measures the transfer function allowing to deduce the tightening parameters in exit of the rollers 4a and 4b to be injected into the regulation system 11 according to the hanger you want to apply to the plate.

Cette opération peut également être effectuée automatiquement par un calculateur.This can also be done automatically by a computer.

Dès que les paramètres de serrage des rouleaux 4a et 4b sont déterminés, l'actionneur 12 agit directement sur le serrage des rouleaux 4a et 4b en sortie de planeuse 1, c'est à dire sur leur écartement relatif.As soon as the tightening parameters of the rollers 4a and 4b are determined, the actuator 12 acts directly on the clamping of the rollers 4a and 4b at the outlet leveler 1, ie on their relative spacing.

Le procédé selon l'invention permet ainsi de contrôler en temps réel le cintre de chacune des plaques 8. Ainsi, lorsque les caractéristiques mécaniques de la plaque 8 d'une bobine varient, le contrôle en temps réel du cintre de la plaque 8 permet d'agir aussitôt sur les paramètres de serrage en sortie de planeuse 1 et de modifier, le cas échéant, les réglages du serrage en sortie (rouleaux 4a et 4b), de manière à obtenir des plaques 8 dont le cintre est constant, ou dont la valeur du cintre reste dans la limite de la tolérance fixée par l'industriel.The method according to the invention thus makes it possible to control in real time the hanger of each of the plates 8. Thus, when the characteristics plate 8 mechanics of a coil vary, real-time control of the hanger of the plate 8 makes it possible to act immediately on the tightening parameters in leveler output 1 and modify, if necessary, the tightening settings at the outlet (rollers 4a and 4b), so as to obtain plates 8, the hanger is constant, or whose value of the hanger remains within the limit of tolerance set by the manufacturer.

Outre l'avantage mentionné précédemment, le procédé selon l'invention supprime les opérations de levage de la plaque et de mesure du cintre par un opérateur, et présente par rapport à l'art antérieur les autres avantages suivants :

  • amélioration des conditions de sécurité ;
  • suppression du temps de manutention des plaques permettant ainsi d'augmenter la productivité globale de la ligne ;
  • rapidité d'exécution des corrections du serrage des rouleaux, dans le cas
où l'on utilise un calculateur automatique,
  • opération de contrôle du cintre de la plaque facile à mettre en oeuvre, on n'est pas limité aux plaques de longueur inférieure à 3 m pour des épaisseurs de 3 mm comme c'était le cas avec le procédé de l'art antérieur ;
  • gain de place : le dispositif selon l'invention est compatible avec les lignes compactes, il nécessite un espace plus réduit que celui nécessité par le levage de la plaque.
  • contrôle systématique du cintre de toutes les plaques (archivage des valeurs)
In addition to the advantage mentioned above, the method according to the invention eliminates the operations of lifting the plate and measuring the hanger by an operator, and has the following other advantages over the prior art:
  • improved security conditions;
  • elimination of plate handling time, thereby increasing the overall productivity of the line;
  • speed of execution of the roller tightening corrections, in the case
where we use an automatic calculator,
  • control operation of the hanger of the plate easy to implement, it is not limited to plates of length less than 3 m for thicknesses of 3 mm as was the case with the method of the prior art;
  • space saving: the device according to the invention is compatible with compact lines, it requires a smaller space than that required by lifting the plate.
  • systematic control of the hanger of all plates (archiving of values)

La figure 2 montre la variation de la valeur du cintre résiduel (exprimé en mm/m) en fonction du serrage des rouleaux en sortie de planeuse (exprimé en mm).Figure 2 shows the variation in the value of the residual hanger (expressed in mm / m) as a function of the tightness of the rollers at the exit from the leveler (expressed in mm).

Le matériau considéré est une bande d'acier de 6 mm d'épaisseur, de 1500 mm de large et de limite élastique de 350 Mpa. Le taux de plastification initial de la bande est de 60%. Le taux de plastification maximal visé pour cet exemple est de 80%. Ce taux de plastification imposé dépend de la stratégie de planage utilisée et de la planéité initiale de la bande avant planage. L'amplitude des variations de cintre après planage est directement corrélée à ce paramètre.The material considered is a steel strip 6 mm thick, 1500 mm wide and elastic limit of 350 Mpa. The initial plasticization rate of the band is 60%. The maximum plasticization rate targeted for this example is 80%. This imposed plasticization rate depends on the strategy leveling used and the initial flatness of the strip before leveling. The amplitude of the hanger variations after leveling is directly correlated to this parameter.

Les exemples suivants ont pour but d'illustrer l'utilisation du procédé.The following examples are intended to illustrate the use of the process.

Dans l'exemple 1, les capteurs de distance sans contact mesurent un cintre résiduel de la plaque obtenu après planage et cisaillage de la bande d'acier de +7mm/m. Pour que le cintre de cette plaque soit nul (plaque parfaitement plane), il faut que le système de régulation (a) corrige le serrage des rouleaux en sortie de planeuse par une correction de 0,15 mm de manière à ce que le serrage atteigne 0,32 mm.In Example 1, the contactless distance sensors measure a hanger residual of the plate obtained after planing and shearing of the steel strip of + 7mm / m. So that the hanger of this plate is zero (plate perfectly plane), the regulation system (a) must correct the tightening of the rollers at the exit from the leveler by a correction of 0.15 mm so that the tightening reaches 0.32 mm.

Dans l'exemple 2, les capteurs de distance sans contact mesurent un cintre résiduel de la plaque obtenue après planage et cisaillage de la bande d'acier de -7mm/m. Pour que le cintre de cette plaque soit nul (plaque parfaitement plane), il faut que le système de régulation (a') corrige le serrage des rouleaux en sortie de planeuse par une correction de 0,2 mm de manière à ce que le serrage atteigne 0,32 mm.In Example 2, the contactless distance sensors measure a hanger residual of the plate obtained after planing and shearing of the steel strip of -7mm / m. So that the hanger of this plate is zero (plate perfectly plane), the regulation system (a ') must correct the tightening of the rollers at the exit from the leveler by a correction of 0.2 mm so that the tightening reaches 0.32 mm.

Claims (9)

  1. A method for adjusting in real time a planisher for planishing metal strips, plates or sheets, in which method:
    after the said strip (5) has been planished, it is cut to obtain a planished plate (8) or a planished sheet; the said method being characterised in that
    the curvature of the said planished plate (8) resulting either from the planishing of the cut strip (5) or from the planishing of the plate (5) is measured at the exit from the said planisher (1) outside a support region;
    the said measurement is corrected in order to eliminate the effect of the dead weight of the planished plate (8); and
    if necessary, the clamping of the rollers (4a) and (4b) disposed at the exit from the said planisher (1) is corrected in order to obtain a planished plate (8) having a controlled curve.
  2. A method according to claim 1, characterised in that the measurement of the residual curve of the planished plate (8) is carried out on the basis of a measurement of the curvature of the said planished plate (8) at the exit from the planisher (1) outside the said support region, the said measurement being carried out by means of at least three distance sensors (9).
  3. A method according to claims 1 to 2, characterised in that the measurement of the residual curve of the planished plate (8) is deduced from the measured curvature and from the inherent curvature of the planished plate (8).
  4. Planishing apparatus including a planisher for planishing metal strips, plates or sheets, comprising means for cutting the strip (5), after planishing, into planished plates (8) or into planished sheets, characterised in that the said apparatus includes means for measuring the residual curve of the planished plates (8) or planished sheets resulting either from the planishing of the cut strip (5) or from the planishing of the plate (5) or of the sheet, at the exit from the planisher (1), and means for modifying the clamping of the rollers (4a) and (4b) disposed at the exit from the said planisher (1) in dependence upon the information provided by the means for measuring the said residual curve.
  5. Planishing apparatus according to claim 4, characterised in that the said means for measuring the residual curve comprise at least three distance sensors (9).
  6. Planishing apparatus according to claims 4 to 5, characterised in that the said means for measuring the residual curve comprise at least three optical distance sensors (9).
  7. Planishing apparatus according to claims 4 to 5, characterised in that the said means for measuring the residual curve comprise at least three eddy current distance sensors (9).
  8. Planishing apparatus according to claims 4 to 7, characterised in that it includes automatic means for adjusting the clamping of the delivery rollers (4a) and (4b) in dependence upon the information provided by the distance measurements of the sensors (9).
  9. Planishing apparatus according to claims 4 to 8, characterised in that the curvature of the planished plate (8) is measured at the said planished plate (8) outside a support region.
EP01272062A 2000-12-27 2001-12-14 Method for real-time adjustment of a planisher Expired - Lifetime EP1345712B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0017085A FR2818563B1 (en) 2000-12-27 2000-12-27 METHOD FOR REAL-TIME REGULATION OF A PLANER
FR0017085 2000-12-27
PCT/FR2001/003992 WO2002051563A1 (en) 2000-12-27 2001-12-14 Method for real-time adjustment of a planisher

Publications (2)

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EP1345712A1 EP1345712A1 (en) 2003-09-24
EP1345712B1 true EP1345712B1 (en) 2004-09-01

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US (1) US7032420B2 (en)
EP (1) EP1345712B1 (en)
AT (1) ATE275007T1 (en)
CA (1) CA2432648C (en)
CZ (1) CZ305184B6 (en)
DE (1) DE60105312T2 (en)
ES (1) ES2230238T3 (en)
FR (1) FR2818563B1 (en)
ME (1) ME00794B (en)
PL (1) PL201321B1 (en)
PT (1) PT1345712E (en)
RS (1) RS50159B (en)
TR (1) TR200402368T4 (en)
WO (1) WO2002051563A1 (en)

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CN104550326A (en) * 2013-10-18 2015-04-29 沈阳东宝海星金属材料科技有限公司 Periodical longitudinal variable-thickness plate straightener

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US9021844B2 (en) * 2013-03-15 2015-05-05 The Bradbury Company, Inc. Methods and apparatus to monitor material conditioning machines
DE102015218599A1 (en) 2015-09-28 2017-03-30 Bayerische Motoren Werke Aktiengesellschaft Method for directing a distortion of a component by a straightening device and straightening device
PL233869B1 (en) * 2018-01-26 2019-12-31 Ekoinstal Holding Spólka Z Ograniczona Odpowiedzialnoscia Spólka Komandytowa Method for the sheet metal straightening by pulling
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AT524979A1 (en) * 2021-04-27 2022-11-15 Evg Entwicklungs U Verwertungs Ges M B H Wire straightening machine and method of straightening wire or strip material

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Publication number Priority date Publication date Assignee Title
CN104550326A (en) * 2013-10-18 2015-04-29 沈阳东宝海星金属材料科技有限公司 Periodical longitudinal variable-thickness plate straightener
CN104550326B (en) * 2013-10-18 2016-07-13 沈阳东宝海星金属材料科技有限公司 A kind of periodic longitudinal variable-thickness sheet material straightener

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CA2432648C (en) 2009-11-17
YU47003A (en) 2004-11-25
FR2818563A1 (en) 2002-06-28
CA2432648A1 (en) 2002-07-04
CZ20031785A3 (en) 2004-02-18
WO2002051563A1 (en) 2002-07-04
US7032420B2 (en) 2006-04-25
CZ305184B6 (en) 2015-06-03
PL361846A1 (en) 2004-10-04
EP1345712A1 (en) 2003-09-24
ME00794B (en) 2012-03-20
DE60105312D1 (en) 2004-10-07
PT1345712E (en) 2005-01-31
TR200402368T4 (en) 2004-12-21
PL201321B1 (en) 2009-03-31
ATE275007T1 (en) 2004-09-15
RS50159B (en) 2009-05-06
FR2818563B1 (en) 2003-02-07
DE60105312T2 (en) 2005-09-01
US20040069035A1 (en) 2004-04-15
ES2230238T3 (en) 2005-05-01

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