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EP1673181B1 - Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same - Google Patents

Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same Download PDF

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Publication number
EP1673181B1
EP1673181B1 EP04787476A EP04787476A EP1673181B1 EP 1673181 B1 EP1673181 B1 EP 1673181B1 EP 04787476 A EP04787476 A EP 04787476A EP 04787476 A EP04787476 A EP 04787476A EP 1673181 B1 EP1673181 B1 EP 1673181B1
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EP
European Patent Office
Prior art keywords
flattening
rollers
machine
accordance
installation
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EP04787476A
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German (de)
French (fr)
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EP1673181A1 (en
Inventor
Andrzej Farnik
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Clecim SAS
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Siemens VAI Metals Technologies SAS
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the subject of the invention is a method for controlling the trajectory of the product in a nested roller planing machine and the planing installation for implementing the method.
  • a multi-roll planer For planing flat products and, in particular, laminated metal strips, a multi-roll planer is often used comprising two planing equipments each carrying a series of rollers with parallel axes and placed, respectively, above and below the strip, the rollers being offset longitudinally and vertically so as to interlock by determining a corrugated path of the strip which is thus subjected to tensile-bending effects in alternate directions.
  • the operation of such a machine has been the subject of advanced theoretical approaches. These theories of planing are based on the calculation of the maximum curvatures of the sheet in the planer, these curvatures cause a plasticization of the material in the thickness of the product which conditions stress relieving in the width and the thickness.
  • Any planer can be broken down into two zones whose functions are very different but complementary and interactive.
  • the entry zone which includes the first three or four rollers, is a large plasticizing zone in which visual flatness defects such as long or long center edges, "quarter-band" defects and any distribution are eliminated. transverse heterogeneity of longitudinal stresses.
  • the exit zone which includes the last three or four rollers, has the function of reducing the gradients of the normal and transverse stresses in the thickness to ensure the sheet metal hanger and tile residual almost zero.
  • a leveling installation therefore generally comprises a fixed support cage, two parallel roller leveling equipments placed respectively above and below the strip and whose rollers are nested so as to determine a path corrugated the band and means for adjusting and maintaining the spacing of said crews by pressing the fixed cage for adjusting the nesting of the rollers, each leveling unit having a row of parallel active rollers supported on a frame of support by means of at least one row of support rollers and rotatably mounted at their ends, each on two bearings defining an axis of rotation perpendicular to the direction of travel, said bearings being carried, respectively, by two side parts secured to the support frame.
  • the lower leveling crew is fixed in position, the upper crew being able to move vertically for nesting adjustment.
  • the upper crew being able to move vertically for nesting adjustment.
  • it is generally used four mechanical or hydraulic actuators mounted at the corners of the frame and to adjust the general level of the adjustable crew relative to the lower fixed crew and, therefore, the nesting rollers.
  • the input and output actuators can be set differently, which allows to determine a tilt generally necessary to achieve the two planar effects established by the theory and discussed above.
  • the actuators can also be adjusted differently from one side to the other by introducing lateral tilting so as to correctly distribute the planing effect over the width of the product to be hovered.
  • planers a structure as rigid as possible so as to control the effects of planing.
  • the deformation under stress of the different parts of the machine (also called ceding) distorts the accuracy of the control of the position of the leveling rollers, therefore the exact value of the curvature obtained on each roll.
  • ceding distorts the accuracy of the control of the position of the leveling rollers, therefore the exact value of the curvature obtained on each roll.
  • the overall capping of the machine modifies the desired level of plasticization, so risk in the entry zone of not completely eliminating flatness defects, it also modifies the decay rate of the plasticization, therefore the transition with the exit zone and may not eliminate residual stresses as expected.
  • hydraulic level planers were made for moving the moving planing equipment, and also for the individual control of each leveling roller, and a capping model based on effort and a theoretical calculation of the deformations of the machine under effort, to compensate for these deformations, as in the applicant's patent FR 2,732,913 .
  • the capping module of a leveling machine is of the order of 100 t / mm per column, while the leveling force for a sheet of 3 meters of width can be from 1000 tonnes to 2500 tonnes. which leads to a cedar (without compensation) of 2.5 mm to 5 mm.
  • the precision required is not very high in the entrance area of the machine and could accommodate a simple compensation cedar, there is however the risk of having refusal of commitment of the product in a machine set too tight as a precaution.
  • the necessary precision on the curvatures for the elimination of the residual stresses in the exit zone requires a precision of the control of the position of the rollers by a few tenths of a millimeter.
  • the control of the transition zone finally implies having precise control on practically all the rollers, all the more so as for certain applications the steps of the rollers rigidly held in position will be varied so as to increase the capacity of the planer as it says in the patent FR 2,732,913 . This will have the effect of moving the entry zone and the exit zone and will therefore also contribute to a search for greater accuracy in controlling the position of all the rollers of the planer.
  • the invention therefore aims to increase the accuracy of control of these machines and a machine equipped with a new control device and to solve all of these problems without causing complication or excessive cost of the devices used.
  • the compensation of the cages is replaced by a real-time model of presetting of the position of the planing rollers associated with a direct measurement of the spacing of the active rollers.
  • a theoretical presetting model is installed which gives at least one reference value for the pre-adjustment of the nestings and one directly measures at least one value of the spacing of the planing rollers, which is compared to the reference values and acts on the adjusting members of the position of the leveling rollers to maintain the measured values equal to the values of the reference so as to maintain the trajectory of the product to be hovered inside the machine in accordance with the ripple provided by the model to achieve planing.
  • a measurement is made of the value of the spacing of each of the leveling rollers which is compared with each reference value given by the model and acts on the individual adjustment members of the position of each of the leveling rollers to maintain the measured value equal to the value of the reference so as to achieve the corrugation and the decrease in the rate of plasticization provided by the model for performing leveling.
  • the position control requires to ensure that at uniform positions of planing rollers, given by position sensors, correspond identical leveling forces. It is necessary first to perform a kind of calibration so as not to depend on the mounting mode of the sensors in the machine and the position of their reference 'zero'.
  • a calibration is carried out, called equilination of the active rollers on a flat machined sheet of known thickness by differentially modifying the position of the active rollers by lateral tilting from one side to the other so to achieve equal leveling efforts on both sides of the machine measured by the measuring devices.
  • equilination is carried out on a moving sheet by differentially modifying the position of the active rollers by a lateral tilting from one side to the other and that one proceeds to the equalizing the averages of the forces recorded by the measuring devices on each side during said scrolling.
  • a device for directly measuring the value of the spacing of the leveling rollers in at least one point so as to know the exact value of the nesting by a direct measurement preferably comprises an electronic device for controlling the measured spacing of the planing rollers to the theoretical value given by the model by acting on the adjustment devices of the nesting.
  • the adjustment devices of the nesting are hydraulically controlled.
  • the installation is provided with a device allowing the direct measurement of the value of the spacing of the leveling rollers in at least two points, one located in the zone d entry of the machine and the other located in the exit zone.
  • the electronic device makes it possible to control the measured spacing of the leveling rollers located in the input zone of the machine and respectively in the output zone at the theoretical value given by the model for spacing the rollers located in the input zone of the machine and respectively in the output zone by acting independently on the devices for adjusting the nesting of the rollers of each of the inlet and outlet zones, respectively.
  • These devices are preferably hydraulically controlled.
  • independent devices allow the direct measurement of the spacing value of each pair of active planing rolls separately.
  • the parallel roll leveling installation comprises means for individually adjusting the position of each leveling roller and an electronic device enabling the measured distance of each of the leveling rollers to be controlled at the theoretical value given by the model for the leveling roller. spacing of each of these rollers by acting independently on their nest adjustment device.
  • the leveling installation advantageously comprises a device for adjusting the interlocking of each hydraulically controlled roller,
  • the electronic devices for servocontrolling the measured gap of the leveling rollers to the theoretical value given by the model comprise a differential adjustment device for adjusting a lateral tilting of the rollers on one side. relative to the other and with respect to the setpoint value, to allow a calibration of the device by an equilination process on a flat machined sheet of known thickness.
  • Figure 1 is an elevational view of the installation, in section along its vertical median plane parallel to the direction of travel, the planing crews being in the open position.
  • Figure 2 is an overall diagram of the control circuits of the cylinders.
  • FIG. 1 shows the mechanical part of the assembly of an installation according to the invention comprising, in a general manner, a support cage 1, an upper planing unit 2 and a lower planing unit 2 ' multi-roll.
  • the fixed support cage 1 comprises a lower bed base 11, two lateral uprights placed on either side of a longitudinal median plane P of travel of the band 10 to be hovered and an upper bed base 14.
  • Each lateral amount consists of a pair of spaced columns 12, 12 ', 13 (in the figures, only three columns are visible). These columns and the upper bed, generally forming a rigid slab, are equipped with various devices known in themselves and widely described in the prior art that can cooperate to allow vertical sliding of the bed base 14 along the four columns 12, 12 ' 13. This movement can be mechanical using motorized screws or hydraulic as shown in Figure 1.
  • each jack consists of a body 31 fixed to the bed base 14 and a piston 32 secured to the column.
  • the lower bed base 11 being fixed, the upper bed base 14 can move, under the action of four cylinders 3, the pistons of the cylinders remaining at the same level.
  • the cylinders 3 are positioned to adjust the desirable imbrication of the rolls with respect to the thickness of the sheet to be hovered so as to achieve the corrugation determined by the theoretical model. They exert the effort of planing during the passage of the product.
  • Each planing unit 2, 2 ' comprises a row of active rollers 4, 4' associated with a row of support rollers 5, 5 'the assembly being carried by a frame.
  • Each active roller 4, 4 ' is rotatably mounted on two bearings defining its axis of rotation, it is supported on a support roller 5, 5' rotatably mounted on two end bearings.
  • this support member 52 may comprise an adjustment device which makes it possible to modify individually for each active roller its nesting, the overall value of which is given by the positioning of the bed base of the upper planing unit 2 with the aid of the cylinders 3
  • These adjustment devices can be mechanical, such as a wedge system, or they can be constituted by a row of hydraulic cylinders as in the patent FR 2,732,913 .
  • At least one sensor 6 making it possible to continuously measure the absolute value of the spacing of the active rolls 4, 4 ', independently of the deformation of the columns and of the whole of the machine, installed for example between the upper planing crew 2 and lower 2 '.
  • two sensors 6 and 6 'one at the entrance of the machine and the other in the output area so as to control more precisely the variation of the rate of plasticization as well as this has been described in the general discussion of the problem.
  • the sensors can be of any type, and for example of the Linear Variable Differential Transformer (LVDT) type with the body attached to a planing unit and the rod to the other. They can also be contactless, for example ultrasonic, laser, optical filter, Bragg grating, etc.
  • LVDT Linear Variable Differential Transformer
  • FIG. 2 represents the set of mechanical and electrical devices associated to constitute a leveling machine according to the invention.
  • the mechanical part of the machine is shown schematically in a cross section.
  • the sensor or sensors 6 are mounted on one side of the machine, the hydraulic cylinders 3 are equipped with sensors 35 for measuring overall planing forces.
  • These cylinders are powered by a conventional pump and accumulator device 8 via two servo valves or two groups of servo valves 71, 72 feeding each side of the machine.
  • These servo valves are controlled by at least one electronic control circuit decomposing into two electronic circuits each controlling a servo valve or a group of servo valves.
  • These electronic circuits (91, 92), which may be analog or digital computers, include summing circuits and conventional proportional, integral and differential control circuits known as 'PID'.
  • the reference values corresponding to the desirable nesting of the active rollers are elaborated by a leveling model 110 implemented in a process computer 100, they are introduced into the servo valve control electronic circuits. (91, 92) via an adder / differentiator stage 93, 94 which makes it possible to introduce a tilting control of the machine from one side to the other.
  • the force sensors 35 are connected to the computer 100 in which will be developed a tilt instruction, it is summed to the nesting reference in the circuit 94 to be sent as a control signal for one side of the machine, it is differentiated from the same signal in the circuit 93 to be sent as a control signal for the other side of the machine.
  • the computer 100 is connected to operator interface devices such as screen and control panel 101, printer and recorder 102 so as to control the operation of the machine and manage its production.
  • the same type of circuit will be used.
  • the jacks 3 located on the input side and those on the output side are powered separately by servo valves and all the electronic circuits 9 described above are doubled for the independent control of each zone; of course it is the same computer 100 that develops all the references and distributes them on all the electronic control circuits.
  • each upper support roller 5 are adjusting members and can individually control each upper active roller 4, an individual and separate embodiment is carried out separately. measuring the spacing between each of the upper and lower active rollers and a control device similar to that described is installed for each pair of active rolls.
  • control device (9) of the type described above for each pair of active cylinder.
  • the computer 100 is used to develop all the instructions and to distribute them on all the electronic control circuits 9.
  • the main cylinders 3 are no longer used for these functions and are used to adjust the opening and the general closing of the machine. according to the thickness of the sheet to hover.
  • the exact desired ripple is obtained by adjusting the individual nesting of each roll 4 by means of the adjusting devices 52.
  • the distance between the active rollers 4,4 ' is measured, compared with the reference setpoint produced using the planing model, and the necessary correction is introduced so as to cancel the error. resulting from deformations of the machine under the planing force by acting on the adjustment means of the nesting.
  • the absolute measurement of the deviation of the active cylinders is obtained by means of the sensors 6, this value is compared with the reference in the circuits 91 and 92 and the resulting signal serves to control the servo valve 7 which makes it possible to move the cylinders 3 controlling the movement of the planing equipment.
  • the reference is obtained by combining the dimension developed by the leveling model 110 and the tilt instruction.
  • the two quantities are added in the circuit 94 to be applied on one side of the machine, they are subtracted in the circuit 93 to be applied on the other side of the machine, so as to perform a balanced tilt and distributed on the side by to the value of the theoretical nesting needed to obtain the ripple defined by the model.
  • an absolute measurement of the difference between the active rolls 4, 4 'in the entry zone of the machine and another in the exit zone is carried out. These measurements are compared with the reference instructions developed using the leveling model for each of these two zones and the necessary corrections are introduced in order to cancel the errors resulting from the deformations of the machine under the planing force by acting on the means 3 for adjusting the imbrication of the entry zone and the exit zone, by acting separately by specific control circuits of the jacks 3 of the entry zone and those of the exit zone .
  • an absolute measurement of the difference of the active rolls 4, 4 'for each pair of active rolls is carried out. These measurements are compared to the reference instructions developed using the planing model 110 for each of the pairs of active cylinders and the necessary corrections are introduced so as to cancel the errors resulting from the deformations of the machine under the planing force by acting on the means 52 for adjusting the nesting of each pair of active rolls.
  • the lower leveling crew has one more roll than the upper leveling crew.
  • an upper leveling roller is always facing the space between two adjacent lower planing rolls.
  • the so-called "gap of the active rolls 4, 4 'for each pair of active rolls” is the distance between the horizontal tangent to an upper active roll and the tangent to the two lower rolls arranged below the upper roll. This difference can be measured by averaging the distance from the upper roll to each of the two corresponding lower rolls.
  • the nesting references developed by the leveling model 110 are added to a tilt instruction to control one side of the machine, and entrenched to control the other side; in order to achieve a balanced tilt and distributed by side with respect to the value of the theoretical nesting necessary to obtain the undulation defined by the model.
  • the individual adjustment means of the nesting of the active cylinders 52 are constituted by a row of hydraulic cylinders, it will be advantageous to superimpose the adjustment of the nesting of the row of jacks, a differential individual adjustment of each cylinder to achieve a bending effect on the active roller so as to obtain a better distribution of the leveling effect on the width of the product to be hovered.
  • the tipping instructions are established during an equilination phase on a flat machined product of known thickness as a gauge.
  • This product or template is introduced into the machine and a slight interlocking is controlled to cause the active rollers to be clamped on the product or template.
  • We then measure the leveling forces induced on each side of the machine for example using the force sensors 35 installed on the cylinders 3 when one is in the presence of a machine of the type described in Figure 2. It then controls a tilting so as to balance the forces on one side and the other of the machine, if they are not initially, by tightening the side of the machine that generates the smallest effort, and we note the value of the tilt which allows to obtain equal efforts on each side. All this sequence is managed by the computer 100 which makes it possible to memorize the values of the forces and those of the failovers produced.
  • This equilination method is, according to the invention, used with all the embodiments of the method described, that is to say that it can be implemented by the two groups of cylinders 3 (one group for each side of the machine) in the case where only a sensor is available for measuring the distance of the active rollers, but it can also be implemented by performing a simultaneous equilagration but independent of the cylinders 3 of the zone of entry and those of the exit area in case one has a measurement in each of these areas.
  • each upper active roller 4 is a device consisting of a row of hydraulic cylinders, as well as an absolute measure of the spacing for each pair of active rolls.
  • the procedure is the same and consists in ordering a tilting of each pair of active rolls until the equal forces applied at their end are obtained, and using this tipping value as a set point for all subsequent operation. of the machine.
  • equilination is performed on a moving strip.
  • a flat machined product of known and constant thickness is used, a slight imbrication of the active rollers corresponding to a dimension a little smaller than the thickness of the product serving as caliber is controlled, and the produced in the machine.
  • plan a sheet by the method according to the invention begins by calculating using a planing model, the spacings that must present in load planing rollers.
  • the leveling model that can be used is for example a model that the skilled person knows. Such a model calculates the behavior of the product to be hung and the planer from the geometric and mechanical characteristics of the sheet to planer and the planer (for example: thickness and width of the sheet, yield strength at the leveling temperature of the metal of which it is made, possibly amplitude and nature of the defects, number of glider rolls, distance between rollers of the same crew, roll diameter).
  • the setting instructions can be supplemented by balancing instructions between the two sides of the leveler determined by the equilination operation.
  • the vacuum planer is first pre-adjusted, then during leveling (when the planer is loaded), the spacings of the active rolls as measured so that they remain substantially equal to the set values.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Press Drives And Press Lines (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Machine Tool Units (AREA)
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Description

Le document FR-A-2732913 , divulgue un procédé et une installation tels que définis dans les préambules des revendications 1 et 6.The document FR-A-2732913 discloses a method and an installation as defined in the preambles of claims 1 and 6.

L'invention a pour objet un procédé de contrôle de la trajectoire du produit dans une machine à planer à rouleaux imbriqués et l'installation de planage permettant la mise en oeuvre du procédé.The subject of the invention is a method for controlling the trajectory of the product in a nested roller planing machine and the planing installation for implementing the method.

Pour le planage des produits plats et, en particulier, des bandes métalliques laminées, on utilise souvent une planeuse à multi-rouleaux comprenant deux équipages de planage portant chacun une série de rouleaux à axes parallèles et placés, respectivement, au dessus et en dessous de la bande, les rouleaux étant décalés longitudinalement et verticalement de façon à s'imbriquer en déterminant un trajet ondulé de la bande qui est ainsi soumise à des effets de traction-flexion dans des sens alternés.For planing flat products and, in particular, laminated metal strips, a multi-roll planer is often used comprising two planing equipments each carrying a series of rollers with parallel axes and placed, respectively, above and below the strip, the rollers being offset longitudinally and vertically so as to interlock by determining a corrugated path of the strip which is thus subjected to tensile-bending effects in alternate directions.

Le fonctionnement d'une telle machine a fait l'objet d'approches théoriques avancées. Ces théories du planage s'appuient sur le calcul des courbures maximales de la tôle dans la planeuse, ces courbures engendrent une plastification de la matière dans l'épaisseur du produit qui conditionne le détensionnement des contraintes dans la largeur et l'épaisseur. Toute planeuse peut être décomposée en deux zones dont les fonctions sont très différentes mais complémentaires et interactives. La zone d'entrée, qui comprend les trois ou quatre premiers rouleaux est une zone de plastification importante dans laquelle on élimine les défauts visuels de planéité tels que les bords longs ou le centre long, les défauts « quart de bande » ainsi que toute répartition transversale hétérogène des contraintes longitudinales. La zone de sortie, qui comprend les trois ou quatre derniers rouleaux, a pour fonction de réduire les gradients des contraintes normales et transversales dans l'épaisseur pour assurer à la tôle un cintre et une tuile résiduels quasi nuls.The operation of such a machine has been the subject of advanced theoretical approaches. These theories of planing are based on the calculation of the maximum curvatures of the sheet in the planer, these curvatures cause a plasticization of the material in the thickness of the product which conditions stress relieving in the width and the thickness. Any planer can be broken down into two zones whose functions are very different but complementary and interactive. The entry zone, which includes the first three or four rollers, is a large plasticizing zone in which visual flatness defects such as long or long center edges, "quarter-band" defects and any distribution are eliminated. transverse heterogeneity of longitudinal stresses. The exit zone, which includes the last three or four rollers, has the function of reducing the gradients of the normal and transverse stresses in the thickness to ensure the sheet metal hanger and tile residual almost zero.

On sait établir des calculs théoriques performants permettant d'obtenir un résultat théorique précis et pouvant servir au préréglage des machines. Le principe est basé sur la décroissance progressive du taux de plastification. Ceci ne peut être obtenu qu'avec des machines comportant un nombre suffisant de rouleaux planeurs et permettant un réglage adéquat de l'imbrication de chacun de ces rouleaux. Si la précision demandée pour les premiers rouleaux est relativement faible, car on recherche un taux de plastification élevé, celle nécessaire au réglage des rouleaux de la zone de sortie est élevée, et ceci d'autant plus que les épaisseurs des tôles à planer sont plus fines. Il est donc souhaitable d'avoir des machines dont les rouleaux ont tous un réglage indépendant, qui soit d'une précision suffisante, fiable et répétitive.It is known to establish efficient theoretical calculations to obtain a precise theoretical result and can be used to preset the machines. The principle is based on the progressive decrease of the plastification rate. This can only be obtained with machines having a sufficient number of gliding rollers and allowing a proper adjustment of the nesting of each of these rollers. If the precision required for the first rollers is relatively low, since a high level of plasticization is sought, that required for the adjustment of the rollers of the exit zone is high, and all the more so since the thicknesses of the sheets to be hovered are more fines. It is therefore desirable to have machines whose rollers all have independent adjustment, which is of sufficient precision, reliable and repetitive.

Une installation de planage comprend donc, d'une façon générale, une cage de soutien fixe, deux équipages de planage à rouleaux parallèles, placés respectivement au-dessus et en dessous de la bande et dont les rouleaux sont imbriqués de façon à déterminer un trajet ondulé de la bande et des moyens de réglage et de maintien de l'écartement desdits équipages par appui sur la cage fixe pour le réglage de l'imbrication des rouleaux, chaque équipage de planage comportant une rangée de rouleaux actifs parallèles prenant appui sur un châssis de support par l'intermédiaire d'au moins une rangée de rouleaux d'appui et montés rotatifs, à leurs extrémités, chacun sur deux paliers définissant un axe de rotation perpendiculaire à la direction de défilement, lesdits paliers étant portés, respectivement, par deux pièces latérales solidaires du châssis de support.A leveling installation therefore generally comprises a fixed support cage, two parallel roller leveling equipments placed respectively above and below the strip and whose rollers are nested so as to determine a path corrugated the band and means for adjusting and maintaining the spacing of said crews by pressing the fixed cage for adjusting the nesting of the rollers, each leveling unit having a row of parallel active rollers supported on a frame of support by means of at least one row of support rollers and rotatably mounted at their ends, each on two bearings defining an axis of rotation perpendicular to the direction of travel, said bearings being carried, respectively, by two side parts secured to the support frame.

Le plus souvent l'équipage de planage inférieur est fixe en position, l'équipage supérieur pouvant se déplacer verticalement pour le réglage de l'imbrication. A cet effet, on utilise généralement quatre actionneurs mécaniques ou hydrauliques montés aux angles du châssis et permettant de régler le niveau général de l'équipage réglable par rapport à l'équipage inférieur fixe et, par conséquent, l'imbrication des rouleaux. En outre, les actionneurs en entrée et en sortie peuvent être réglés différemment, ce qui permet de déterminer un basculement en général nécessaire à la réalisation des deux effets de planage établis par la théorie et exposés plus haut. Les actionneurs peuvent aussi être réglés différemment d'un côté relativement à l'autre en introduisant un basculement latéral de manière à répartir correctement l'effet de planage sur la largeur du produit à planer.Most often the lower leveling crew is fixed in position, the upper crew being able to move vertically for nesting adjustment. For this purpose, it is generally used four mechanical or hydraulic actuators mounted at the corners of the frame and to adjust the general level of the adjustable crew relative to the lower fixed crew and, therefore, the nesting rollers. In addition, the input and output actuators can be set differently, which allows to determine a tilt generally necessary to achieve the two planar effects established by the theory and discussed above. The actuators can also be adjusted differently from one side to the other by introducing lateral tilting so as to correctly distribute the planing effect over the width of the product to be hovered.

Les efforts développés pour le planage sont très élevés, en particulier lorsque cette opération est réalisée sur une tôle forte après laminage à chaud et refroidissement accéléré, ou bien sur une tôle froide. On est donc amené à donner aux planeuses une structure aussi rigide que possible de façon à pouvoir contrôler les effets du planage. La déformation sous effort des différentes parties de la machine (encore appelée cédage) fausse la précision du contrôle de la position des rouleaux de planage, donc la valeur exacte de la courbure obtenue sur chaque rouleau. Le cédage global de la machine modifie le taux de plastification visé, donc risque en zone d'entée de ne pas éliminer complètement les défauts de planéité, il modifie aussi le taux de décroissance de la plastification, donc la transition avec la zone de sortie et risque de ne pas éliminer les contraintes résiduelles comme prévu. De plus il peut se produire un cédage transversal, d'un côté sur l'autre, qui va modifier le taux de plastification en zone d'entrée et son homogénéité dans la largeur du produit, il peut même créer des défauts de planéité.The efforts developed for planing are very high, especially when this operation is performed on a hot plate after hot rolling and accelerated cooling, or on a cold sheet. It is therefore necessary to give the planers a structure as rigid as possible so as to control the effects of planing. The deformation under stress of the different parts of the machine (also called ceding) distorts the accuracy of the control of the position of the leveling rollers, therefore the exact value of the curvature obtained on each roll. The overall capping of the machine modifies the desired level of plasticization, so risk in the entry zone of not completely eliminating flatness defects, it also modifies the decay rate of the plasticization, therefore the transition with the exit zone and may not eliminate residual stresses as expected. In addition it can occur a transverse cedar, from one side to the other, which will change the rate of plasticization in the entrance area and its homogeneity in the width of the product, it can even create flatness defects.

Pour palier à ces inconvénients on a réalisé des planeuses a contrôle hydraulique pour le déplacement de l'équipage de planage mobile, et aussi pour le contrôle individuel de chaque rouleau de planage, et on a associé un modèle de cédage basé sur les mesures d'effort et un calcul théorique des déformations de la machine sous effort, pour compenser ces déformations, comme dans le brevet de la requérante FR 2 732 913 .To overcome these drawbacks, hydraulic level planers were made for moving the moving planing equipment, and also for the individual control of each leveling roller, and a capping model based on effort and a theoretical calculation of the deformations of the machine under effort, to compensate for these deformations, as in the applicant's patent FR 2,732,913 .

Mais toutes ces compensations sont entachées d'erreurs dues aux non linéarités du cédage de la machine et qui ont pour origine les frottements que l'on trouve entre les parties fixes et les parties mobiles de la machine. De plus le module de cédage d'une planeuse, même de conception robuste est de l'ordre de 100 t/mm par colonne, or l'effort de planage pour une tôle de 3 mètres de largeur peut être de 1000 tonnes à 2500 tonnes ce qui conduit à un cédage (sans compensation) de 2,5 mm à 5 mm. La précision demandée n'est pas très élevée dans la zone d'entrée de la machine et pourrait s'accommoder d'une simple compensation de cédage, il y aurait cependant le risque d'avoir des refus d'engagement du produit dans une machine réglée trop serrée par précaution. Par contre la précision nécessaire sur les courbures pour l'élimination des contraintes résiduelles dans la zone de sortie exige une précision du contrôle de la position des rouleaux de quelques dixièmes de millimètres. Le contrôle de la zone de transition implique finalement d'avoir un contrôle précis sur pratiquement tous les rouleaux, d'autant plus que pour certaines applications on va faire varier le pas des rouleaux maintenus rigidement en position de manière à augmenter la capacité de la planeuse, comme il est dit dans le brevet FR 2 732 913 . Cela aura pour effet de déplacer la zone d'entrée et la zone de sortie et va donc contribuer aussi à une recherche d'une plus grande précision de contrôle de la position de tous les rouleaux de la planeuse.But all these compensations are marred by errors due to the non-linearities of the ceding of the machine and which originate from the friction that is found between the fixed parts and the moving parts of the machine. In addition, the capping module of a leveling machine, even of robust design, is of the order of 100 t / mm per column, while the leveling force for a sheet of 3 meters of width can be from 1000 tonnes to 2500 tonnes. which leads to a cedar (without compensation) of 2.5 mm to 5 mm. The precision required is not very high in the entrance area of the machine and could accommodate a simple compensation cedar, there is however the risk of having refusal of commitment of the product in a machine set too tight as a precaution. On the other hand the necessary precision on the curvatures for the elimination of the residual stresses in the exit zone requires a precision of the control of the position of the rollers by a few tenths of a millimeter. The control of the transition zone finally implies having precise control on practically all the rollers, all the more so as for certain applications the steps of the rollers rigidly held in position will be varied so as to increase the capacity of the planer as it says in the patent FR 2,732,913 . This will have the effect of moving the entry zone and the exit zone and will therefore also contribute to a search for greater accuracy in controlling the position of all the rollers of the planer.

L'invention a donc pour but d'augmenter la précision du contrôle de ces machines et une machine équipée d'un nouveau dispositif de contrôle et permettant de résoudre l'ensemble de ces problèmes sans entraîner de complication ni de coût excessif des dispositifs utilisés.The invention therefore aims to increase the accuracy of control of these machines and a machine equipped with a new control device and to solve all of these problems without causing complication or excessive cost of the devices used.

La compensation des cédages est remplacée par un modèle en temps réel de préréglage de la position des rouleaux de planage associé à une mesure directe de l'écartement des rouleaux actifs.The compensation of the cages is replaced by a real-time model of presetting of the position of the planing rollers associated with a direct measurement of the spacing of the active rollers.

L'invention est définie dans les revendications 1 et 6.The invention is defined in claims 1 and 6.

Dans un procédé selon l'invention, on installe un modèle théorique de préréglage qui donne au moins une valeur de référence pour le préréglage des imbrications et on mesure directement au moins une valeur de l'écartement des rouleaux de planage, que l'on compare aux valeurs de référence et on agit sur les organes de réglage de la position des rouleaux de planage pour maintenir les valeurs mesurées égales aux valeurs de la référence de manière à maintenir la trajectoire du produit à planer à l'intérieur de la machine conformément à l'ondulation prévue par le modèle pour réaliser le planage. En particulier on réalise deux mesures de la valeur de l'écartement des rouleaux de planage, une première à l'entrée de la machine et, respectivement, une seconde à la sortie de la machine, que l'on compare chacune de ces mesures à la valeur de référence donnée par le modèle pour les mêmes rouleaux, respectivement à l'entrée et à la sortie de la machine et on agit sur les organes de réglage de la position des rouleaux de planage en entrée et respectivement en sortie de la machine pour maintenir la valeur mesurée égale à la valeur de la référence de manière à réaliser la décroissance du taux de plastification prévue par le modèle pour réaliser le planage. En particulier, dans un procédé complet on réalise une mesure de la valeur de l'écartement de chacun des rouleaux de planage que l'on compare à chaque valeur de référence donnée par le modèle et on agit sur les organes de réglage individuels de la position de chacun des rouleaux de planage pour maintenir la valeur mesurée égale à la valeur de la référence de manière à réaliser l'ondulation et la décroissance du taux de plastification prévues par le modèle pour réaliser le planage. Mais le contrôle de position nécessite de s'assurer qu'à des positions uniformes des rouleaux de planage, données par des capteurs de position, correspondent des efforts de planage identiques. Il faut au préalable réaliser une sorte d'étalonnage de manière à ne pas dépendre du mode de montage des capteurs dans la machine et de la position de leur référence 'zéro'.In a method according to the invention, a theoretical presetting model is installed which gives at least one reference value for the pre-adjustment of the nestings and one directly measures at least one value of the spacing of the planing rollers, which is compared to the reference values and acts on the adjusting members of the position of the leveling rollers to maintain the measured values equal to the values of the reference so as to maintain the trajectory of the product to be hovered inside the machine in accordance with the ripple provided by the model to achieve planing. In particular two measurements of the value of the spacing of the planing rollers are carried out, a first at the entrance of the machine and, respectively, a second at the exit of the machine, that each of these measurements is compared to the reference value given by the model for the same rollers, respectively at the inlet and at the outlet of the machine, and the elements for adjusting the position of the planing rollers at the inlet and at the outlet of the machine are adjusted. keep the measured value equal to the value of the reference so as to achieve the decrease of the rate of plastification provided by the model to achieve leveling. In particular, in a complete process a measurement is made of the value of the spacing of each of the leveling rollers which is compared with each reference value given by the model and acts on the individual adjustment members of the position of each of the leveling rollers to maintain the measured value equal to the value of the reference so as to achieve the corrugation and the decrease in the rate of plasticization provided by the model for performing leveling. But the position control requires to ensure that at uniform positions of planing rollers, given by position sensors, correspond identical leveling forces. It is necessary first to perform a kind of calibration so as not to depend on the mounting mode of the sensors in the machine and the position of their reference 'zero'.

Dans un procédé préferable selon invention on procède à un étalonnage, appelé équinivelage des rouleaux actifs sur une tôle usinée plane d'épaisseur connue en modifiant de façon différentielle la position des rouleaux actifs par un basculement latéral d'un côté sur l'autre de manière à obtenir l'égalité des efforts de planage des deux côtés de la machine mesurés par les dispositifs de mesure. Dans un procédé plus élaboré de l'invention on réalise l'équinivelage sur une tôle en défilement en modifiant de façon différentielle la position des rouleaux actifs par un basculement latéral d'un côté sur l'autre et que l'on procède à l'égalisation des moyennes des efforts enregistrés par les dispositifs de mesure de chaque côté pendant ledit défilement.In a preferred method according to the invention a calibration is carried out, called equilination of the active rollers on a flat machined sheet of known thickness by differentially modifying the position of the active rollers by lateral tilting from one side to the other so to achieve equal leveling efforts on both sides of the machine measured by the measuring devices. In a more elaborate method of the invention equilination is carried out on a moving sheet by differentially modifying the position of the active rollers by a lateral tilting from one side to the other and that one proceeds to the equalizing the averages of the forces recorded by the measuring devices on each side during said scrolling.

Dans une installation de planage à rouleaux parallèles selon l'invention on dispose d'un dispositif permettant la mesure directe de la valeur de l'écartement des rouleaux de planage en au moins un point de façon à connaître la valeur exacte de l'imbrication par une mesure directe. L'installation comporte préferablement un dispositif électronique permettant d'asservir l'écartement mesuré des rouleaux de planage à la valeur théorique donnée par le modèle en agissant sur les dispositifs de réglage de l'imbrication. Dans une version améliorée de l'invention les dispositifs de réglage de l'imbrication sont à commande hydraulique.In a parallel roller leveling installation according to the invention there is provided a device for directly measuring the value of the spacing of the leveling rollers in at least one point so as to know the exact value of the nesting by a direct measurement. The installation preferably comprises an electronic device for controlling the measured spacing of the planing rollers to the theoretical value given by the model by acting on the adjustment devices of the nesting. In an improved version of the invention the adjustment devices of the nesting are hydraulically controlled.

Dans une autre disposition d'une installation de planage préferable, l'installation est pourvue d'un dispositif permettant la mesure directe de la valeur de l'écartement des rouleaux de planage en au moins deux points, l'un situé dans la zone d'entrée de la machine et l'autre situé dans la zone de sortie. Dans ce cas le dispositif électronique permet d'asservir l'écartement mesuré des rouleaux de planage situés dans la zone d'entrée de la machine et respectivement dans la zone de sortie à la valeur théorique donnée par le modèle pour l'écartement des rouleaux situés dans la zone d'entrée de la machine et respectivement dans la zone de sortie en agissant de manière indépendante sur les dispositifs de réglage de l'imbrication des rouleaux de chacune des zones respectivement d'entrée et de sortie. Ces dispositifs sont, de manière préférentielle à commande hydraulique.In another arrangement of a preferable planing installation, the installation is provided with a device allowing the direct measurement of the value of the spacing of the leveling rollers in at least two points, one located in the zone d entry of the machine and the other located in the exit zone. In this case, the electronic device makes it possible to control the measured spacing of the leveling rollers located in the input zone of the machine and respectively in the output zone at the theoretical value given by the model for spacing the rollers located in the input zone of the machine and respectively in the output zone by acting independently on the devices for adjusting the nesting of the rollers of each of the inlet and outlet zones, respectively. These devices are preferably hydraulically controlled.

Dans une disposition très améliorée de l'invention des dispositifs indépendants permettent la mesure directe de la valeur de l'écartement de chaque paire de rouleaux actifs de planage de manière séparée. L'installation de planage à rouleaux parallèles comporte un moyen de réglage individuel de la position de chaque rouleau de planage et un dispositif électronique permettant d'asservir l'écartement mesuré de chacun des rouleaux de planage à la valeur théorique donnée par le modèle pour l'écartement de chacun de ces rouleaux en agissant de manière indépendante sur leur dispositif de réglage de l'imbrication.In a greatly improved arrangement of the invention, independent devices allow the direct measurement of the spacing value of each pair of active planing rolls separately. The parallel roll leveling installation comprises means for individually adjusting the position of each leveling roller and an electronic device enabling the measured distance of each of the leveling rollers to be controlled at the theoretical value given by the model for the leveling roller. spacing of each of these rollers by acting independently on their nest adjustment device.

L'installation de planage comporte avantageusement un dispositif de réglage de l'imbrication de chaque rouleau à commande hydraulique,The leveling installation advantageously comprises a device for adjusting the interlocking of each hydraulically controlled roller,

Dans une installation de planage à rouleaux parallèles préferable les dispositifs électroniques permettant d'asservir l'écartement mesuré des rouleaux de planage à la valeur théorique donnée par le modèle comportent un dispositif de réglage différentiel permettant de régler un basculement latéral des rouleaux d'un côté par rapport à l'autre et par rapport à la valeur de consigne, pour permettre un tarage du dispositif par un procédé d'équinivelage sur un tôle usinée plane et d'épaisseur connue.In a preferred parallel roller milling system the electronic devices for servocontrolling the measured gap of the leveling rollers to the theoretical value given by the model comprise a differential adjustment device for adjusting a lateral tilting of the rollers on one side. relative to the other and with respect to the setpoint value, to allow a calibration of the device by an equilination process on a flat machined sheet of known thickness.

Mais l'invention sera mieux comprise par la description de certains modes de réalisation particuliers, donnés à titre d'exemple et représentés sur les dessins.But the invention will be better understood by the description of certain particular embodiments, given by way of example and shown in the drawings.

La figure 1 est une vue en élévation de l'installation, en coupe suivant son plan médian vertical parallèle à la direction de défilement, les équipages de planage étant en position ouverte.Figure 1 is an elevational view of the installation, in section along its vertical median plane parallel to the direction of travel, the planing crews being in the open position.

La figure 2 est un schéma d'ensemble des circuits de commande des vérins.Figure 2 is an overall diagram of the control circuits of the cylinders.

Sur la figure 1 on a représenté la partie mécanique de l'ensemble d'une installation selon l'invention comprenant, d'une façon générale, une cage de soutien 1, un équipage de planage supérieur 2 et un équipage de planage inférieur 2' multi-rouleaux.FIG. 1 shows the mechanical part of the assembly of an installation according to the invention comprising, in a general manner, a support cage 1, an upper planing unit 2 and a lower planing unit 2 ' multi-roll.

D'une façon générale, la cage de soutien fixe 1 comprend un sommier inférieur 11, deux montants latéraux placés de part et d'autre d'un plan médian longitudinal P de défilement de la bande 10 à planer et un sommier supérieur 14.In a general manner, the fixed support cage 1 comprises a lower bed base 11, two lateral uprights placed on either side of a longitudinal median plane P of travel of the band 10 to be hovered and an upper bed base 14.

Chaque montant latéral est constitué d'une paire de colonnes écartées 12, 12', 13 (sur les figures, seules trois colonnes sont visibles). Ces colonnes et le sommier supérieur, formant généralement une dalle rigide, sont équipés de dispositifs variés connus en eux même et largement décrits dans l'art antérieur qui peuvent coopérer pour permettre un coulissement vertical du sommier 14 le long des quatre colonnes 12, 12', 13. Ce mouvement peut être mécanique mettant en oeuvre des vis motorisées ou hydraulique comme représenté sur la figure 1. Dans ce cas on dispose de quatre vérins 3 installés au sommet de chaque colonne. Dans la disposition représentée chaque vérin est constitué d'un corps 31 fixé sur le sommier 14 et d'un piston 32 solidaire de la colonne. Le sommier inférieur 11 étant fixe, le sommier supérieur 14 peut donc se déplacer, sous l'action des quatre vérins 3, les pistons des vérins restant au même niveau. Les vérins 3 sont positionnés pour régler l'imbrication souhaitable des rouleaux par rapport à l'épaisseur de la tôle à planer de manière à réaliser l'ondulation déterminée par le modèle théorique. Ils exercent l'effort de planage pendant le passage du produit.Each lateral amount consists of a pair of spaced columns 12, 12 ', 13 (in the figures, only three columns are visible). These columns and the upper bed, generally forming a rigid slab, are equipped with various devices known in themselves and widely described in the prior art that can cooperate to allow vertical sliding of the bed base 14 along the four columns 12, 12 ' 13. This movement can be mechanical using motorized screws or hydraulic as shown in Figure 1. In this case there are four cylinders 3 installed at the top of each column. In the arrangement shown, each jack consists of a body 31 fixed to the bed base 14 and a piston 32 secured to the column. The lower bed base 11 being fixed, the upper bed base 14 can move, under the action of four cylinders 3, the pistons of the cylinders remaining at the same level. The cylinders 3 are positioned to adjust the desirable imbrication of the rolls with respect to the thickness of the sheet to be hovered so as to achieve the corrugation determined by the theoretical model. They exert the effort of planing during the passage of the product.

On peut aussi imaginer d'autres dispositions, comme celle comportant des pistons mobiles et des corps de vérins fixes, sans sortir du cadre de l'invention.It is also possible to imagine other arrangements, such as that comprising moving pistons and fixed cylinder bodies, without departing from the scope of the invention.

Chaque équipage de planage 2, 2' comprend une rangée de rouleaux actifs 4, 4' associés à une rangée de rouleaux d'appui 5, 5' l'ensemble étant porté par un châssis.Each planing unit 2, 2 'comprises a row of active rollers 4, 4' associated with a row of support rollers 5, 5 'the assembly being carried by a frame.

Chaque rouleau actif 4, 4' est monté rotatif sur deux paliers définissant son axe de rotation, il s'appui sur un rouleau d'appui 5, 5' monté rotatif sur deux paliers d'extrémité.Each active roller 4, 4 'is rotatably mounted on two bearings defining its axis of rotation, it is supported on a support roller 5, 5' rotatably mounted on two end bearings.

Sur la représentation de la figure 1, les paliers d'extrémité 51 de l'équipage de planage supérieur 2 prennent appui sur le sommier supérieur par l'intermédiaire d'un organe de support 52. Dans une version plus élaborée de l'invention, cet organe de support peut comporter un dispositif de réglage qui permet de modifier de manière individuelle pour chaque rouleau actif son imbrication, dont la valeur globale est donnée par le positionnement du sommier de l'équipage de planage supérieur 2 à l'aide des vérins 3. Ces dispositifs de réglages peuvent être mécaniques, comme par exemple un système à coins, ou bien peuvent être constitués par une rangée de vérins hydrauliques comme dans le brevet FR 2 732 913 . Dans ce cas il sera possible, en plus du réglage individuel de l'imbrication, d'obtenir par le réglage différentiel des vérins d'une même rangée, un effet de cambrage des cylindres actifs de manière à mieux répartir l'effet de planage sur la largeur de la bande à planer.In the representation of FIG. 1, the end bearings 51 of the upper planing unit 2 are supported on the upper bed base by means of a support member 52. In a more elaborate version of the invention, this support member may comprise an adjustment device which makes it possible to modify individually for each active roller its nesting, the overall value of which is given by the positioning of the bed base of the upper planing unit 2 with the aid of the cylinders 3 These adjustment devices can be mechanical, such as a wedge system, or they can be constituted by a row of hydraulic cylinders as in the patent FR 2,732,913 . In this case it will be possible, in addition to the individual adjustment of the nesting, to obtain by the differential adjustment of the cylinders of the same row, a bending effect of the active cylinders so as to better distribute the planing effect on the width of the tape to glide.

Selon une caractéristique essentielle de l'invention on dispose au moins un capteur 6 permettant de mesurer en permanence la valeur absolue de l'écartement des cylindres actifs 4, 4', de manière indépendante de la déformation des colonnes et de l'ensemble de la machine, installé par exemple entre les équipages de planage supérieur 2 et inférieur 2'. Dans la représentation de la figure 1 on a représenté deux capteurs 6 et 6' l'un à l'entrée de la machine et l'autre dans la zone de sortie de manière à pouvoir contrôler plus précisément la variation du taux de plastification ainsi que cela à été décrit dans l'exposé général du problème.According to an essential characteristic of the invention there is at least one sensor 6 making it possible to continuously measure the absolute value of the spacing of the active rolls 4, 4 ', independently of the deformation of the columns and of the whole of the machine, installed for example between the upper planing crew 2 and lower 2 '. In the representation of Figure 1 there are shown two sensors 6 and 6 'one at the entrance of the machine and the other in the output area so as to control more precisely the variation of the rate of plasticization as well as this has been described in the general discussion of the problem.

Dans un mode de réalisation particulier de l'invention, et pour une utilisation plus large de toutes les possibilités de la machine, on pourra installer un capteur permettant de mesurer individuellement l'écartement de chaque paire 4, 4' de rouleaux actifs.In a particular embodiment of the invention, and for wider use of all the possibilities of the machine, it will be possible to install a sensor making it possible to individually measure the spacing of each pair 4, 4 'of active rollers.

Les capteurs peuvent être de tout type, et par exemple du type LVDT (Linear Variable Differential Transformer) avec le corps fixé à un équipage de planage et la tige à l'autre. Ils peuvent également être sans contact, par exemple ultrasoniques, à laser, à filtre optique, à réseau de Bragg, etc...The sensors can be of any type, and for example of the Linear Variable Differential Transformer (LVDT) type with the body attached to a planing unit and the rod to the other. They can also be contactless, for example ultrasonic, laser, optical filter, Bragg grating, etc.

La figure 2 représente l'ensemble des dispositifs mécaniques et électriques associés pour constituer une machine de planage selon l'invention. La partie mécanique de la machine est représentée schématiquement dans une coupe transversale. Le ou les capteurs 6 sont montés sur un côté de la machine, les vérins hydrauliques 3 sont équipés de capteurs 35 permettant la mesure des efforts globaux de planage. Ces vérins sont alimentés par un dispositif classique 8 de pompe et d'accumulateur par l'intermédiaire de deux servo valves ou de deux groupes de servo valves 71, 72 alimentant chaque côté de la machine. Ces servo valves sont commandées par au moins un circuit électronique de contrôle se décomposant en deux circuits électroniques commandant chacun une servo-valve ou un groupe de servo-valves.FIG. 2 represents the set of mechanical and electrical devices associated to constitute a leveling machine according to the invention. The mechanical part of the machine is shown schematically in a cross section. The sensor or sensors 6 are mounted on one side of the machine, the hydraulic cylinders 3 are equipped with sensors 35 for measuring overall planing forces. These cylinders are powered by a conventional pump and accumulator device 8 via two servo valves or two groups of servo valves 71, 72 feeding each side of the machine. These servo valves are controlled by at least one electronic control circuit decomposing into two electronic circuits each controlling a servo valve or a group of servo valves.

Dans une installation selon l'invention on réalise une boucle fermée de la valeur mesurée de l'écartement des rouleaux actifs 4, 4' sur la position de référence introduite dans le circuit électronique de commande des servo valves.In an installation according to the invention there is provided a closed loop of the measured value of the spacing of the active rollers 4, 4 'to the reference position introduced into the electronic control circuit of the servo valves.

Ces circuits électroniques (91,92) qui peuvent être analogiques ou bien des calculateurs numériques comportent des circuits sommateurs et des circuits classiques de contrôle proportionnel, intégral et différentiel dits 'PID'.These electronic circuits (91, 92), which may be analog or digital computers, include summing circuits and conventional proportional, integral and differential control circuits known as 'PID'.

Selon une disposition préférentielle de l'invention, les valeurs de références correspondant à l'imbrication souhaitable des rouleaux actifs sont élaborées par un modèle de planage 110 implémenté dans un calculateur de process 100, elles sont introduites dans les circuits électronique de contrôle des servo valves (91, 92) via un étage sommateur / différentiateur 93, 94 qui permet d'introduire une commande de basculement de la machine d'un côté par rapport à l'autre. Les capteurs d'effort 35 sont connectés au calculateur 100 dans lequel sera élaboré une consigne de basculement, celle- ci est sommée à la référence d'imbrication dans le circuit 94 pour être envoyé comme signal de commande pour un côté de la machine, elle est différentiée par rapport au même signal dans le circuit 93 pour être envoyé comme signal de commande pour l'autre côté de la machine.According to a preferred embodiment of the invention, the reference values corresponding to the desirable nesting of the active rollers are elaborated by a leveling model 110 implemented in a process computer 100, they are introduced into the servo valve control electronic circuits. (91, 92) via an adder / differentiator stage 93, 94 which makes it possible to introduce a tilting control of the machine from one side to the other. The force sensors 35 are connected to the computer 100 in which will be developed a tilt instruction, it is summed to the nesting reference in the circuit 94 to be sent as a control signal for one side of the machine, it is differentiated from the same signal in the circuit 93 to be sent as a control signal for the other side of the machine.

Par ailleurs, et de manière classique le calculateur 100 est connecté à des appareils d'interface opérateur tels qu'écran et pupitre de commande 101, imprimante et enregistreur 102 de manière à pouvoir commander le fonctionnement de la machine et gérer sa production.Moreover, and conventionally the computer 100 is connected to operator interface devices such as screen and control panel 101, printer and recorder 102 so as to control the operation of the machine and manage its production.

Dans un mode de réalisation plus élaboré de l'invention, par exemple avec un capteur dans la zone d'entrée de la machine et l'autre dans la zone de sortie, le même type de circuit sera utilisé. Les vérins 3 situés du côté entrée et ceux du côte sortie sont alimentés séparément par des servo valves et tous les circuits électroniques 9 décrits plus haut sont doublés pour le contrôle indépendant de chaque zone ; bien entendu c'est le même calculateur 100 qui élabore toutes les références et les distribue sur l'ensemble des circuits électroniques de contrôle.In a more elaborate embodiment of the invention, for example with a sensor in the input area of the machine and the other in the output area, the same type of circuit will be used. The jacks 3 located on the input side and those on the output side are powered separately by servo valves and all the electronic circuits 9 described above are doubled for the independent control of each zone; of course it is the same computer 100 that develops all the references and distributes them on all the electronic control circuits.

Dans un autre mode de réalisation, toujours selon l'invention, les organes de support 52 de chacun rouleau d'appui supérieur 5 sont des organes de réglage et permettent de commander individuellement chaque rouleau actif supérieur 4, on réalise de manière individuelle et séparée une mesure de l'écartement entre chacun des rouleaux actifs supérieurs et inférieurs et un dispositif de contrôle similaire à celui décrit est installé pour chaque paire de cylindres actifs.In another embodiment, still according to the invention, the support members 52 of each upper support roller 5 are adjusting members and can individually control each upper active roller 4, an individual and separate embodiment is carried out separately. measuring the spacing between each of the upper and lower active rollers and a control device similar to that described is installed for each pair of active rolls.

Dans le cas où les organes de support 52 sont des organes de réglage constitués de vérins hydrauliques, on réalise un dispositif de contrôle (9) du type de celui décrit plus haut pour chaque paire de cylindre actif.In the case where the support members 52 are adjusting members consisting of hydraulic cylinders, there is provided a control device (9) of the type described above for each pair of active cylinder.

Le calculateur 100 sert à élaborer toutes les consignes et à les distribuer sur tous les circuits de contrôle électroniques 9. Dans ce cas les vérins principaux 3 ne servent plus à ces fonctions et sont utilisés pour régler l'ouverture et la fermeture générale de la machine selon l'épaisseur de la tôle à planer. L'ondulation exacte souhaitée est obtenue par le réglage de l'imbrication individuelle de chaque rouleau 4 au moyen des dispositifs de réglage 52.The computer 100 is used to develop all the instructions and to distribute them on all the electronic control circuits 9. In this case the main cylinders 3 are no longer used for these functions and are used to adjust the opening and the general closing of the machine. according to the thickness of the sheet to hover. The exact desired ripple is obtained by adjusting the individual nesting of each roll 4 by means of the adjusting devices 52.

Dans un procédé selon l'invention, on mesure l'écartement des rouleaux actifs 4,4', on compare à la consigne de référence élaborée à l'aide du modèle de planage et on introduit la correction nécessaire de façon à annuler l'erreur résultant des déformations de la machine sous l'effort de planage en agissant sur les moyens de réglage de l'imbrication. La mesure absolue de l'écart des cylindres actifs est obtenue à l'aide des capteurs 6, cette valeur est comparée avec la référence dans les circuits 91 et 92 et le signal résultant sert à commander la servo valve 7 qui permet de déplacer les vérins 3 contrôlant le déplacement de l'équipement de planage.In a method according to the invention, the distance between the active rollers 4,4 'is measured, compared with the reference setpoint produced using the planing model, and the necessary correction is introduced so as to cancel the error. resulting from deformations of the machine under the planing force by acting on the adjustment means of the nesting. The absolute measurement of the deviation of the active cylinders is obtained by means of the sensors 6, this value is compared with the reference in the circuits 91 and 92 and the resulting signal serves to control the servo valve 7 which makes it possible to move the cylinders 3 controlling the movement of the planing equipment.

La référence est obtenue en combinant la cote élaborée par le modèle de planage 110 et la consigne de basculement. Les deux grandeurs sont additionnées dans le circuit 94 pour être appliquées sur un côté de la machine, elles sont soustraites dans le circuit 93 pour être appliquées sur l'autre côté de la machine, de manière à réaliser un basculement équilibré et réparti par côté par rapport à la valeur de l'imbrication théorique nécessaire pour obtenir l'ondulation définie par le modèle.The reference is obtained by combining the dimension developed by the leveling model 110 and the tilt instruction. The two quantities are added in the circuit 94 to be applied on one side of the machine, they are subtracted in the circuit 93 to be applied on the other side of the machine, so as to perform a balanced tilt and distributed on the side by to the value of the theoretical nesting needed to obtain the ripple defined by the model.

Dans un mode de réalisation préférentiel de l'invention, on réalise une mesure absolue de l'écart des cylindres actifs 4, 4' dans la zone d'entrée de la machine, et une autre dans la zone de sortie. On compare ces mesures aux consignes de références élaborées à l'aide du modèle de planage pour chacune de ces deux zones et on introduit les corrections nécessaires de façon à annuler les erreurs résultant des déformations de la machine sous l'effort de planage en agissant sur les moyens 3 de réglage de l'imbrication de la zone d'entrée et de la zone de sortie, en agissant de manière séparée par des circuits spécifiques de contrôle des vérins 3 de la zone d'entrée et de ceux de la zone de sortie.In a preferred embodiment of the invention, an absolute measurement of the difference between the active rolls 4, 4 'in the entry zone of the machine and another in the exit zone is carried out. These measurements are compared with the reference instructions developed using the leveling model for each of these two zones and the necessary corrections are introduced in order to cancel the errors resulting from the deformations of the machine under the planing force by acting on the means 3 for adjusting the imbrication of the entry zone and the exit zone, by acting separately by specific control circuits of the jacks 3 of the entry zone and those of the exit zone .

Dans un autre mode de réalisation de l'invention, on réalise une mesure absolue de l'écart des cylindres actifs 4, 4' pour chaque paire de cylindres actifs. On compare ces mesures aux consignes de références élaborées à l'aide du modèle 110 de planage pour chacune des paires de cylindres actifs et on introduit les corrections nécessaires de façon à annuler les erreurs résultant des déformations de la machine sous l'effort de planage en agissant sur les moyens 52 de réglage de l'imbrication de chaque paire de cylindres actifs.In another embodiment of the invention, an absolute measurement of the difference of the active rolls 4, 4 'for each pair of active rolls is carried out. These measurements are compared to the reference instructions developed using the planing model 110 for each of the pairs of active cylinders and the necessary corrections are introduced so as to cancel the errors resulting from the deformations of the machine under the planing force by acting on the means 52 for adjusting the nesting of each pair of active rolls.

Il convient de remarquer que l'équipage de planage inférieur comporte un rouleau de plus que l'équipage de planage supérieur. De ce fait, un rouleau de planage supérieur est toujours en regard de l'espace entre deux rouleaux de planage inférieurs adjacents. Dans ces conditions, ce qu'on appelle « l'écart des cylindres actifs 4, 4' pour chaque paire de cylindres actifs » est la distance entre la tangente horizontale à un rouleau actif supérieur et la tangente aux deux rouleaux inférieurs disposés en dessous du rouleau supérieur. Cet écart peut être mesuré en faisant la moyenne des distance du rouleau supérieur à chacun des deux rouleaux inférieurs correspondants.It should be noted that the lower leveling crew has one more roll than the upper leveling crew. As a result, an upper leveling roller is always facing the space between two adjacent lower planing rolls. Under these conditions, the so-called "gap of the active rolls 4, 4 'for each pair of active rolls" is the distance between the horizontal tangent to an upper active roll and the tangent to the two lower rolls arranged below the upper roll. This difference can be measured by averaging the distance from the upper roll to each of the two corresponding lower rolls.

Dans tous les cas, et selon le procédé de l'invention, les références d'imbrication élaborées par le modèle de planage 110 sont ajoutées à une consigne de basculement pour commander un côté de la machine, et retranchées pour commander l'autre côté; de manière à réaliser un basculement équilibré et réparti par côté par rapport à la valeur de l'imbrication théorique nécessaire pour obtenir l'ondulation définie par le modèle. Bien entendu, et toujours dans le cadre d'un procédé selon l'invention, si les moyens de réglage individuels de l'imbrication des cylindres actifs 52 sont constitués par une rangée de vérins hydraulique, il sera avantageux de superposer au réglage de l'imbrication de la rangée de vérins, un réglage individuel différentiel de chaque vérin permettant de réaliser un effet de cambrage sur le rouleau actif de manière à obtenir une meilleure répartition de l'effet de planage sur la largeur du produit à planer.In all cases, and according to the method of the invention, the nesting references developed by the leveling model 110 are added to a tilt instruction to control one side of the machine, and entrenched to control the other side; in order to achieve a balanced tilt and distributed by side with respect to the value of the theoretical nesting necessary to obtain the undulation defined by the model. Of course, and always in the context of a method according to the invention, if the individual adjustment means of the nesting of the active cylinders 52 are constituted by a row of hydraulic cylinders, it will be advantageous to superimpose the adjustment of the nesting of the row of jacks, a differential individual adjustment of each cylinder to achieve a bending effect on the active roller so as to obtain a better distribution of the leveling effect on the width of the product to be hovered.

Dans un procédé selon l'invention, les consignes de basculement sont établies lors d'un phase d'équinivelage sur un produit usiné plat et d'épaisseur connue servant de calibre.In a method according to the invention, the tipping instructions are established during an equilination phase on a flat machined product of known thickness as a gauge.

On introduit ce produit ou calibre dans la machine et on commande une légère imbrication pour provoquer un serrage des rouleaux actifs sur le produit ou calibre. On mesure alors les efforts de planage induits de chaque côté de la machine, par exemple à l'aide des capteurs d'effort 35 installés sur les vérins 3 lorsque l'on est en présence d'une machine du type décrit sur la figure 2. On commande alors un basculement de façon à équilibrer les efforts d'un côté et de l'autre de la machine, s'ils ne le sont pas au départ, en resserrant le côté de la machine qui génère l'effort le plus petit, et on note la valeur du basculement qui permet d'obtenir l'égalité des efforts de chaque côté. Toute cette séquence est gérée par le calculateur 100 qui permet de mémoriser les valeurs des efforts et celles des basculements produits. Ces valeurs sont ensuite utilisées pendant l'exploitation de la machine en tant que préréglage de basculement pour tous les réglages d'imbrication qui seront déterminés par le modèle installé dans le calculateur 100, et selon le mode de réalisation qui a été décrit précédemment. Ce procédé d'équinivelage est, selon l'invention, utilisé avec tous les modes de réalisation du procédé décrits, c'est à dire qu'il peut être mis en oeuvre par les deux groupes des vérins 3 (un groupe pour chaque côté de la machine) dans le cas ou on ne dispose que d'un capteur pour la mesure de l'écartement des rouleaux actifs, mais il peut aussi être mis en oeuvre en procédant à un équinivelage simultané mais indépendant des vérins 3 de la zone d'entrée et de ceux de la zone de sortie dans le cas ou on dispose d'une mesure dans chacune de ces zones.This product or template is introduced into the machine and a slight interlocking is controlled to cause the active rollers to be clamped on the product or template. We then measure the leveling forces induced on each side of the machine, for example using the force sensors 35 installed on the cylinders 3 when one is in the presence of a machine of the type described in Figure 2. It then controls a tilting so as to balance the forces on one side and the other of the machine, if they are not initially, by tightening the side of the machine that generates the smallest effort, and we note the value of the tilt which allows to obtain equal efforts on each side. All this sequence is managed by the computer 100 which makes it possible to memorize the values of the forces and those of the failovers produced. These values are then used during operation of the machine as a failover preset for all nesting settings that will be determined by the model installed in the computer 100, and according to the embodiment that has been described above. This equilination method is, according to the invention, used with all the embodiments of the method described, that is to say that it can be implemented by the two groups of cylinders 3 (one group for each side of the machine) in the case where only a sensor is available for measuring the distance of the active rollers, but it can also be implemented by performing a simultaneous equilagration but independent of the cylinders 3 of the zone of entry and those of the exit area in case one has a measurement in each of these areas.

On peut aussi établir une procédure d'équinivelage équivalente, et toujours selon le procédé de l'invention, dans le mode de réalisation pour lequel les dispositifs support 52 de chaque rouleau actif supérieur 4 est un dispositif constitué d'une rangée de vérins hydrauliques, ainsi que d'une mesure absolue de l'écartement pour chaque paire de rouleaux actifs. La procédure est la même et consiste à commander un basculement de chaque paire de rouleaux actifs jusqu'à l'obtention de l'égalité des efforts appliqués en leur extrémité, et d'utiliser cette valeur de basculement comme consigne pour toute l'exploitation ultérieure de la machine.It is also possible to establish an equivalent equiliation procedure, and still according to the method of the invention, in the embodiment for which the support devices 52 of each upper active roller 4 is a device consisting of a row of hydraulic cylinders, as well as an absolute measure of the spacing for each pair of active rolls. The procedure is the same and consists in ordering a tilting of each pair of active rolls until the equal forces applied at their end are obtained, and using this tipping value as a set point for all subsequent operation. of the machine.

Selon un procédé amélioré de l'invention, l'équinivelage est réalisé sur une bande en défilement. On utilise pour cela un produit usiné plat et d'épaisseur connue et constante, on commande une légère imbrication des rouleaux actifs correspondant à une cote un peu inférieure à l'épaisseur du produit qui sert de calibre, et on introduit et on fait défiler le produit dans la machine. On mesure et on mémorise les efforts générés de chaque côté de la machine et on calcule leur valeur moyenne pendant tout le temps du défilement. L'équinivelage sera alors réalisé en introduisant le basculement qui permettra d'égaliser ces valeurs moyennes.According to an improved method of the invention, equilination is performed on a moving strip. For this purpose a flat machined product of known and constant thickness is used, a slight imbrication of the active rollers corresponding to a dimension a little smaller than the thickness of the product serving as caliber is controlled, and the produced in the machine. We measure and memorize the forces generated on each side of the machine and calculate their average value throughout the scrolling time. Equiliation will then be achieved by introducing the tilt that will equalize these average values.

Bien entendu, l'invention ne se limite pas aux détails des modes de réalisation qui ont été décrits à titre de simple exemple, des variantes pouvant être utilisées sans s'écarter du cadre des revendications.Of course, the invention is not limited to the details of the embodiments that have been described as a simple example, variants that can be used without departing from the scope of the claims.

Dans un mode de réalisation simplifié dans lequel on installe un seul capteur 6 pour mesurer l'écartement des rouleaux actifs 4,4', par exemple dans la zone centrale de la machine, on peut imaginer introduire un basculement réglable entre la zone d'entrée et la zone de sortie en l'introduisant au niveau des circuits électroniques 9, de manière à obtenir une décroissance du taux de plasticité, qui peut être nécessaire dans certains cas.In a simplified embodiment in which a single sensor 6 is installed to measure the spacing of the active rollers 4,4 ', for example in the central zone of the machine, it is conceivable to introduce an adjustable tilting between the input zone and the output zone by introducing it at the level of the electronic circuits 9, so as to obtain a decrease in the rate of plasticity, which may be necessary in certain cases.

En résumé, pour planer une tôle par le procédé selon l'invention, on commence par calculer à l'aide d'un modèle de planage, les écartements que doivent présenter en charge les rouleaux de planage. Le modèle de planage qu'on peut utiliser est par exemple un modèle que l'homme du métier connaît. Un tel modèle calcule le comportement du produit à planer et de la planeuse à partir des caractéristiques géométriques et mécaniques de la tôle à planer et de la planeuse (par exemple : épaisseur et largeur de la tôle, limite d'élasticité à la température de planage du métal dont elle est constituée, éventuellement amplitude et nature des défauts ; nombre de rouleaux planeurs, distance entre rouleaux d'un même équipage, diamètre des rouleaux).In summary, to plan a sheet by the method according to the invention, it begins by calculating using a planing model, the spacings that must present in load planing rollers. The leveling model that can be used is for example a model that the skilled person knows. Such a model calculates the behavior of the product to be hung and the planer from the geometric and mechanical characteristics of the sheet to planer and the planer (for example: thickness and width of the sheet, yield strength at the leveling temperature of the metal of which it is made, possibly amplitude and nature of the defects, number of glider rolls, distance between rollers of the same crew, roll diameter).

Il permet, par des méthodes que l'homme du métier saura mettre en oeuvre, de déterminer un réglage optimal de la planeuse, et ainsi de déterminer des consignes de serrage notamment en entrée et en sortie de planeuse.It allows, by methods that the skilled person will know how to implement, to determine an optimal setting of the planer, and thus to determine clamping instructions including input and output planer.

Les consignes de réglages peuvent être complétées par des consignes d'équilibrage entre les deux côtés de la planeuse, déterminées par l'opération d'équinivelage.The setting instructions can be supplemented by balancing instructions between the two sides of the leveler determined by the equilination operation.

A l'aide des consignes de réglages, éventuellement complétées par les consignes d'équilibrage, on réalise d'abord un préréglage à vide de la planeuse, puis, au cours du planage (lorsque la planeuse est en charge), on régule les écartements des rouleaux actifs tels qu'ils sont mesurés pour qu'ils restent sensiblement égaux aux valeurs de consigne.With the aid of the setting instructions, possibly supplemented by the balancing instructions, the vacuum planer is first pre-adjusted, then during leveling (when the planer is loaded), the spacings of the active rolls as measured so that they remain substantially equal to the set values.

Les signes de référence insérés après les caractéristiques techniques mentionnées dans les revendications, ont pour seul but de faciliter la compréhension de ces dernières et n'en limitent aucunement la portée.The reference signs inserted after the technical features mentioned in the claims, are intended only to facilitate the understanding of the latter and in no way limit the scope.

Claims (15)

  1. Method of controlling the path of the product in a flattening machine of the type comprising a fixed supporting frame (1), two flattening gangs of parallel rollers respectively located above (2) and below (2') the web, requisite devices (3, 52) for setting the imbrication of the rollers, and means (35) for measuring flattening forces at least on two sides of the machine, characterised in that a theoretical presetting model (110) gives at least one reference value for presetting the imbrications, and in that, in the course of flattening, at least one value of the spacing of the flattening rollers is measured directly, which value is compared with reference values, and in that the elements (3, 52) for setting the position of the flattening rollers are acted upon to maintain the measured values equal to the reference values with increased precision so as to maintain the path of the product to be flattened inside the machine in conformity with the undulation expected by the model (110) for carrying out the flattening.
  2. Method of controlling the path of the product in a flattening machine, in accordance with claim 1, characterised in that two measurements of the value of the spacing of the flattening rollers are carried out, the measurements being respectively a first one at the entry to the machine and a second one at the exit from the machine, each of which measurements is compared with the reference value given by the model (110), and in that the elements (3, 52) for setting the position of the flattening rollers respectively at the entry and exit of the machine are acted upon to maintain the measured value equal to the reference value with increased precision so as to be able to achieve the decrease in the degree of plasticisation expected by the model (110) for carrying out the flattening.
  3. Method of controlling the path of the product in a flattening machine, in accordance with claim 1, characterised in that measurement of the value of the spacing of each of the flattening rollers (4, 4') is carried out, each of which measurements is compared with the reference value given by the model (110), and in that the individual elements (3) for setting the position of each of the flattening rollers is acted upon to maintain the measured value equal to the reference value with increased precision so as to achieve the undulation and the decrease in the degree of plasticisation that are expected by the model (110) for carrying out the flattening.
  4. Method of controlling the path of the product in a flattening machine, in accordance with any one of the preceding claims, characterised in that equilevelling of the active rollers is carried out on a flat machined metal sheet of known thickness by differently modifying the position of the active rollers by means of lateral tilting from one side to the other so as to obtain equal flattening forces on the two sides of the machine, which forces are measured by the measurement devices (35).
  5. Method of controlling the path of the product in a flattening machine, in accordance with claim 4, characterised in that the equilevelling is carried out on an advancing metal sheet by differently modifying the position of the active rollers by means of lateral tilting from one side to the other, and in that the average values of the forces recorded by the measurement devices (35) on each side during said advancing are equalised.
  6. Flattening installation comprising parallel rollers for carrying out the method according to any one of claims 1 to 5, comprising a fixed supporting frame (1), two flattening gangs of parallel rollers respectively located above (2) and below (2') the web, requisite devices (3, 52) for setting the imbrication of the rollers (4, 4'), and means (35) for measuring flattening forces at least on each side of the machine, characterised in that the installation is provided with at least one device (6, 6') allowing direct measurement of the value of the spacing of the flattening rollers at at least one point.
  7. Flattening installation comprising parallel rollers, in accordance with claim 6, characterised in that it comprises at least one electronic device (9) making it possible for the measured spacing of the flattening rollers to be controlled in accordance with the theoretical value given by the model (110) by acting on the devices (3) for setting the imbrication.
  8. Flattening installation comprising parallel rollers, in accordance with claim 7, characterised in that the devices (3) for setting the imbrication are hydraulically controlled.
  9. Flattening installation comprising parallel rollers, in accordance with claim 6, characterised in that the installation is provided with a device making possible the direct measurement of the value of the spacing of the flattening rollers at at least two points, one point (6) being located in the entry zone of the machine and the other (6') being located in the exit zone.
  10. Flattening installation comprising parallel rollers, in accordance with claim 9, characterised in that it comprises at least one electronic device (9) making it possible for the measured spacing of the flattening rollers located in the entry zone of the machine and, on the other hand, in the exit zone to be controlled in accordance with the theoretical value given by the model (110) for the spacing of the rollers located, respectively, in the entry zone of the machine and in the exit zone, by acting independently on the devices (3) for setting the imbrication of the rollers of, respectively, each of the entry and exit zones.
  11. Flattening installation comprising parallel rollers, in accordance with claim 10, characterised in that the devices (3) for setting the imbrications are hydraulically controlled.
  12. Flattening installation comprising parallel rollers, in accordance with claim 6, characterised in that the installation is provided with a device (6, 6') making possible the direct and separate measurement of the value of the spacing of each pair of active flattening rollers (4, 4').
  13. Flattening installation comprising parallel rollers, in accordance with claim 12, characterised in that it comprises a means of individually setting the position of each flattening roller and at least one electronic device (9) making it possible for the measured spacing of each of the flattening rollers to be controlled in accordance with the theoretical value given by the model (110) for the spacing of each of those rollers by acting independently on their device (52) for setting the imbrication.
  14. Flattening installation comprising parallel rollers, in accordance with claim 13, characterised in that the device (52) for setting the imbrication of each roller (4) is hydraulically controlled.
  15. Flattening installation comprising parallel rollers, in accordance with any one of claims 8, 11 or 14, characterised in that the electronic device(s) (9) making it possible for the measured spacing of the flattening rollers to be controlled in accordance with the theoretical value given by the model (110) which the installation comprises makes it possible to set a differential lateral tilt of the rollers from one side to the other to a setpoint value.
EP04787476A 2003-10-13 2004-09-28 Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same Expired - Lifetime EP1673181B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0312012A FR2860738B1 (en) 2003-10-13 2003-10-13 METHOD OF INCREASING THE ACCURACY OF PRODUCT TRACK CONTROL IN AN IMBRIC ROLL PLANER MACHINE AND PLANTING INSTALLATION FOR CARRYING OUT THE PROCESS
PCT/FR2004/002457 WO2005046899A1 (en) 2003-10-13 2004-09-28 Method of increasing the control precision of the path of a product in a levelling machine with interlocking rollers, and levelling installation used to implement same

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EP1673181B1 true EP1673181B1 (en) 2007-11-21

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US (1) US7475581B2 (en)
EP (1) EP1673181B1 (en)
JP (1) JP2007508148A (en)
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BR (1) BRPI0414749B1 (en)
DE (1) DE602004010293T2 (en)
ES (1) ES2295935T3 (en)
FR (1) FR2860738B1 (en)
WO (1) WO2005046899A1 (en)

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CN102228914A (en) * 2011-05-04 2011-11-02 南京钢铁股份有限公司 Roll gap positioning method for straightening machine
CN102825106A (en) * 2012-09-13 2012-12-19 山东沃德动力科技有限公司 Stainless steel strip straightening machine
DE102012217493A1 (en) * 2012-09-26 2014-05-28 Kohler Maschinenbau Gmbh straightener
WO2019076886A1 (en) 2017-10-16 2019-04-25 Schuler Pressen Gmbh Method, apparatus and computer program product for setting the bending of at least one straightening roller of a roller straightening machine

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DE102009004996B3 (en) * 2009-01-17 2010-06-17 Burghardt + Schmidt Gmbh Roller straightening bearing frame for straightening machine that is utilized for straightening e.g. metal strips, has bearing frame guide comprising fixing device for fixing position of upper part opposite to lower part
ES2401979T3 (en) * 2009-09-09 2013-04-25 Siemens Vai Metals Technologies Sas Multi roller flattening machine
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DE102010061841A1 (en) 2010-11-24 2012-05-24 Sms Siemag Ag Method for directing metal strip of commission, involves determining and weighing initialization immersion depth for next straightening process according to deviation of strip-shape measuring data and initialization immersion depth
CN102784815B (en) * 2011-05-19 2014-11-05 宝山钢铁股份有限公司 Classification processing method for incoming material length direction plate shape of steel plate cold straightening machine
DE102012204074A1 (en) 2012-03-15 2013-09-19 Sms Siemag Ag Device for straightening metal strip
RS60196B1 (en) * 2015-12-21 2020-06-30 Komax Holding Ag Straightening device for straightening cables
DK3248703T3 (en) * 2016-05-23 2018-12-17 Arku Maschb Gmbh Roll straightening machine with upper and lower straightening rollers as well as a method for simple and quick inspection, inspection and maintenance of the upper straightening rollers on a rolling straightening machine
CN111633057B (en) * 2020-05-14 2022-05-31 太原科技大学 Left-right tilting dynamic straightening method
CN112157140B (en) * 2020-10-10 2024-07-23 伟时电子股份有限公司 Leveling machine
CN113465487B (en) * 2021-05-26 2023-09-05 傅江和 Thickness detection and conveying device for plates
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EP4206336A1 (en) 2021-12-29 2023-07-05 Voestalpine Grobblech GmbH Plate and thermomechanical processing method of raw material for producing a plate
CN118092368B (en) * 2024-04-28 2024-07-23 中国第一重型机械股份公司 Control method and device of roller straightener and storage medium

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CN102228914A (en) * 2011-05-04 2011-11-02 南京钢铁股份有限公司 Roll gap positioning method for straightening machine
CN102825106A (en) * 2012-09-13 2012-12-19 山东沃德动力科技有限公司 Stainless steel strip straightening machine
DE102012217493A1 (en) * 2012-09-26 2014-05-28 Kohler Maschinenbau Gmbh straightener
WO2019076886A1 (en) 2017-10-16 2019-04-25 Schuler Pressen Gmbh Method, apparatus and computer program product for setting the bending of at least one straightening roller of a roller straightening machine
DE102017124027B4 (en) * 2017-10-16 2021-06-10 Schuler Pressen Gmbh Method, device and computer program product for adjusting the bending of at least one straightening roll of a roll straightening machine

Also Published As

Publication number Publication date
DE602004010293T2 (en) 2008-08-21
ES2295935T3 (en) 2008-04-16
US20070055393A1 (en) 2007-03-08
FR2860738B1 (en) 2006-02-03
DE602004010293D1 (en) 2008-01-03
FR2860738A1 (en) 2005-04-15
BRPI0414749A (en) 2006-11-21
JP2007508148A (en) 2007-04-05
BRPI0414749B1 (en) 2017-03-21
US7475581B2 (en) 2009-01-13
CN100364681C (en) 2008-01-30
EP1673181A1 (en) 2006-06-28
CN1856374A (en) 2006-11-01
WO2005046899A1 (en) 2005-05-26

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