EP0665069B1 - Verfahren und Vorrichtung zum Richten eines dünnen Metallbandes - Google Patents

Verfahren und Vorrichtung zum Richten eines dünnen Metallbandes Download PDF

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Publication number
EP0665069B1
EP0665069B1 EP95400163A EP95400163A EP0665069B1 EP 0665069 B1 EP0665069 B1 EP 0665069B1 EP 95400163 A EP95400163 A EP 95400163A EP 95400163 A EP95400163 A EP 95400163A EP 0665069 B1 EP0665069 B1 EP 0665069B1
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EP
European Patent Office
Prior art keywords
strip
straightening
rollers
imbrication
mathematical model
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EP95400163A
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English (en)
French (fr)
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EP0665069A1 (de
Inventor
Marc Bonnefont
Zalman Padwo
Jean-Baptiste Peyron
Paul Sabatier
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Route De Feurs 41 f-42600 Savigneux
Clecim SAS
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Kvaerner Metals Clecim SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/05—Stretching combined with rolling

Definitions

  • the subject of the invention is a method and an installation. leveling under tension of a thin metal strip.
  • Thin and hard steel sheets such as irons whites used in particular for manufacturing of packaging, are produced by rolling in the form of long, thin metal strips which then are processed, cut and formed according to intended use.
  • a thin metal strip should exhibit a number of qualities such as a excellent flatness, drawing ability, condition surface and mechanical properties in accordance with standards corresponding to the desired applications.
  • the metal strip undergoes a number of treatments and in particular it is subjected to a leveling often carried out by traction-bending and under imposed extension.
  • a leveling machine includes one or more two bending units each consisting of a pair of small diameter cylinders placed on either side of the strip and offset in height so as to determine, by their overlapping, a bent path of the strip producing alternate bending on the two cylinders.
  • the strip is subjected to a traction between two blocks tensioners placed on either side of the machine and each consisting of several rolls nested on which rolls up the tape.
  • the rolls of the two blocks tensioners are rotated at speeds slightly different so the speed of scrolling of the strip in the downstream tensioning block or slightly higher than the frame rate upstream.
  • the value can be determined by adjusting the difference scrolling speeds between upstream and downstream.
  • Leveling is carried out by subjecting the strip under tension at least two alternating flexions on small diameter cylinders. We know that during each bending, the stretched outer part of the strip can find in the field of plastic deformations, even if the applied tensile stress is much lower at the elastic limit. We can thus, without submitting the band to undue hardship, determine, between two tensioning blocks, sufficient elongation to exceed the length of the longest fiber so as to level the strip by equalizing the lengths of all its longitudinal fibers.
  • the transverse camber generally called "tile”
  • the defect in longitudinal camber also called “hanger” can be corrected on a scouring cylinder.
  • DE-A-2330064 describes a installation of this type comprising a pair of rollers of dressing by alternating flexions, an anti-tile roller and a camber defect correction roller longitudinal.
  • the latter can be replaced in a embodiment, by a multi-roller assembly comprising a row of lower rollers and a row of upper rollers whose orientation can be set to determine tapering overlaps.
  • This document defines the diameters to be given to rollers so that each defect is corrected by a particular device.
  • a residual longitudinal camber can hinder the introduction of the tape into the installations of following treatment and, in addition, may lead to deformations when the strip is cut into strips, according to the dimensions of the products to be manufactured.
  • the subject of the invention is a method making it possible to Correct satisfactorily the defects induced by the leveling, and in particular the longitudinal camber.
  • the process according to the invention gives great flexibility and allows, after having carried out a first choice, to immediately adapt the settings to the properties tape, if necessary, while scrolling.
  • the invention has essentially for the purpose of obtaining products with camber weak longitudinal, fairly homogeneous, and, in any case, to keep them, when necessary, in the same sense when it is impossible to get a more result satisfactory.
  • the method according to the invention is characterized in claim 1.
  • the method applies to a installation comprising a traction-flexion leveler comprising at least one bending unit consisting of a pair of cylinders offset in height and a set of multi-roller dressing with two frames, respectively lower and upper, each carrying a row of parallel rollers, longitudinally offset and in height, so as to determine, by nesting the rollers, a wavy path of the strip with bending alternating means for adjusting the nesting of cylinders of each bending unit, adjustment means the interlocking of the dresser assembly rollers and two tensioning blocks respectively placed upstream and downstream of the installation on the strip path for apply a tensile stress to it likely to determine an elongation of the strip whose the value is imposed by adjusting the speed of scrolling in said blocks.
  • the defects of flatness in the leveler by adjusting the speeds of scrolling and nesting of the leveling crews of so that the elongation imposed for leveling is, practically done right out of the leveler and corrects at least the defects in the multi-roller assembly of longitudinal camber due to passing through the leveler determining gradual overlaps of the rollers between the input and the output of the multi-roller assembly by tilting one row relative to the other, by so as to cause effects of alternate bending gradually decreasing which determine relaxation constraints, numbers and intensities of inflections alternating being determined by setting the nests respectively at the entrance and at the exit of the set multi-rollers to correct the camber defect without significantly increasing the elongation already achieved in the traction-flexion leveler.
  • Tile correction can be performed at the same time time as the longitudinal camber correction, in the multi-roller assembly, but we can also place a anti-tile device between the leveler and the assembly multi-rollers to at least partially correct the tile before entering the multi-roller assembly.
  • the nests are regulated in the flexion units of the leveler taking into account the dimensional and structural characteristics of the strip so as to achieve elongation in the leveler imposed for the flatness correction while maintaining, generally the tensile stress applied to the band below about 60% of the elastic limit of the metal and we adjust the nests, respectively to the input and output of the multi-roller assembly, for correct camber defects by limiting the increase of traction so that the elongation additional realized in the multi-roller assembly does normally not exceed 0.2%.
  • the nesting of the leveler and the multi-roller assembly are adjusted for each coil and / or determined in permanence during the running of the tape by a automation system taking into account all dimensional, structural and product quality, known cylinder diameters active, the tensions applied to the strip and the interactions between the different organs of the installation.
  • the system of automation is associated with a mathematical model on which are displayed, before processing a reel, all the characteristics specific to the product to process and specific to the installation, said model mathematics developing the nesting instructions for different organs from programmed equations and taking into account the indications obtained by measurement or by observation of residual flatness and longitudinal and transverse camber during the treatment of a strip of nature and dimensions analogues.
  • the automation system determines the nesting of different organs from established tables, for each type of product, taking into account the characteristics machine-specific and information obtained previously by measuring or observing faults longitudinal flatness and camber and transverse during the processing of a strip of nature and similar dimensions.
  • the operator can at any time correct manually each of the settings controlled by the system of automation based on measurements or observations performed on the product during and / or after treatment.
  • manual corrections as well are recorded, classified and possibly optimized in a self-adaptation system which memorizes and, after unlocking by the operator, introduces the necessary modifications into the system automation so that, later, the instructions thus corrected nesting are imposed on different organs during the course of the tape and for the following bands of the same type.
  • the invention therefore allows, when one has developed the process of planing a strip of characteristics determined, to automatically apply the same process to all bands having the same characteristics and, in particular, from the same origin, defects flatness resulting, among other things, from the whole history of the strip and its production process from steel liquid to its final and repeating form, generally, on bands of the same origin.
  • the corrections recorded in the system self-adaptation can be validated and introduced in the mathematical model which is readjusted so that the elaborate instructions correspond to nesting previously corrected.
  • the invention also provides the means get the right settings very quickly even for reels of a product whose characteristics do not not match those of one of the coils already processed.
  • these one or more types of reference approaching most of the new reel and we display on the automation system, i.e. the parameters corresponding to a very similar type, either interpolated parameters or extrapolated, so as to determine, according to the reference types, voltage setpoints and of nesting of the different organs, for the new coil.
  • Corrections thus made to the instructions given by the mathematical model are recorded in the self-adjusting system which can be unlocked by the operator, if the corrections made are appropriate, so that the corrected instructions are used to following the unwinding of the reel and for the reels analogues.
  • Figure 1 shows schematically, in section longitudinal, the whole of a leveling installation for implementing the method according to the invention.
  • Figure 2 is a block diagram of the adjustment of the entire installation.
  • Figure 3 is a block diagram, to scale enlarged, representing the passage of the strip in the multi-roller assembly.
  • FIG 1 there is shown in section longitudinal, the whole of a leveling installation of a metal strip 1 which, in the Figure, scrolls from the right to left passing successively through a upstream tensioning unit 2, a leveler 3 comprising, in the example shown, two bending units 31, 32, one anti-tile device 4, a multi-roller dressing set 5 and a downstream tensioning block 2 '.
  • All these devices are arranged in a frame 10 in cage shape associated with means not shown for maintenance or replacement of the various organs.
  • the two tensioning blocks 2, 2 ' are made up each, in the usual way, of several rolls fairly large diameter on which the strip 1 is wound to get the pull ups that are needed and that are rotated by a mechanism not shown, of so that the winding speed on the downstream block 2 'is a little higher than that of the upstream block 2, the speed difference can be set to determine the desired lengthening.
  • each flexure unit 30 comprises two crews of leveling 31, 32, placed, respectively, above and in below the strip.
  • Each leveling crew 31 (32) comprises a cylinder active 33 (33 ') of small diameter which is supported on the side opposite the strip, on support rollers 34 (34 '), the assembly being placed on a frame 35 (35 ′) which can slide vertically with respect to the cage 10 and the vertical position can be adjusted by one or more hydraulic or mechanical actuators 36 (36 ').
  • the upper crew 31 can move, under the action of jacks 36, between a high position standby, away from the web, and a low position of work, in contact with the band.
  • Mechanical cylinders screws 36 allow to vary the level of the crew lower 32 to adjust the nesting of the active cylinders 33, 33 '.
  • the second bending unit 30a can be adjusted from the same way. Furthermore, it is possible, as we have shown in Figure 1, to completely separate from the band active cylinders, which, depending on the case, to use either one bending unit or both.
  • the anti-tile device 4 which is of a type conventional, includes an active cylinder 41 placed between two rollers 45, 45 'of larger diameter and also resting on a set of support rollers 42 carried by a sliding frame 43 whose position can be adjusted by a jack 44. This makes it possible to adjust the pressure applied to the strip by the anti-tile cylinder 41 which fits between the two rollers 45, 45 '.
  • the anti-tile device is not always essential and can be deleted within simplest installations. However, it can be preferable to provide on the frame 10 of the installation a location 46 provided for the anti-tile device which, thus, can be added to the machine if necessary. Of even, the anti-tile cylinder 41 can be simply removed from the strip or put into service according to the qualities of sheets.
  • the multi-roller assembly 5 which is placed downstream of the anti-tile device 4 and before the downstream tensioning block 2 ', includes two sets of rollers, respectively one upper assembly 50 and a lower assembly 50 'arranged respectively on either side of the scroll plane of band 1.
  • Each set 50 (50 ') is carried by a chassis, respectively upper 6 and lower 6 ', and includes a row of parallel rollers 51 bearing, on the side opposite strip 1, on one or two rows of rollers support 52.
  • the two rows of rollers 51, 51 ' are offset longitudinally and can thus overlap one another by adjusting the relative levels of the frames 6, 6'. so as to define a zigzag path.
  • the lower row 51 ′ has one more roll than the upper row 51, but this arrangement depends on the circumstances, and in particular on the nature of the strip 1 and the distribution of the stresses.
  • the chassis 6 carrying the upper assembly 50 is mounted to slide vertically in two windows 61 of the cage 10 can be placed, by means of one or two jacks 62, either in the low working position, or in the waiting position separated from the band.
  • the 6 'chassis of the assembly lower 50 ' is mounted on a box-shaped frame 63 which can slide vertically in 61 'windows the cage 10 and whose position can be adjusted by a jack 64 thus allowing vertical movement, parallel to itself, from the bottom row of rollers 51 '.
  • the lower chassis 6 forms a cradle which rests on two circular tracks 65 provided on the frame 63 and forming a circular raceway centered on a horizontal axis parallel to the axes of the rollers 51 'and placed substantially at the level of the plane tangent to these last.
  • the cradle 6 ' can thus tilt relative to the frame 63 by turning around the axis of the raceway 65 under the action of a screw jack 66 mounted on the frame 55 and supported, by an articulated link system, on a arm 67 secured to the cradle 6 ', the latter being maintained applied to the raceway 65 by a jack 68 fixed on the frame 63 and allowing the play to be made up.
  • the screw jack 66 therefore makes it possible to give the row of lower rollers 51 'inclination adjustable by compared to upper row 51 while the cylinders screws 64, allow to increase or decrease overall the spacing between the two rows of rollers 51, 51 '.
  • Each positioning means 71 to 75 includes a regulator receiving, on a first input 71a to 75a, a positioning order provided by an automation system 8 and, on a second input 71b to 75b, a signal supplied by a measuring device M1 to M5 indicating, at each instant the respective positions of the organs correspondents, so that the correction necessary to adapt the effect of the organ considered at the order given, at the same instant, by the system automation 8.
  • pairs of pushbuttons B1 to B5 acting in opposite directions, allow the operator intervene, if necessary, on each means of positioning 71 to 75 to bring, in one direction or in the other, a correction to the position of the organ considered ordered by the automation system 8, taking into account information of all kinds which reaches him, by example by observing the cut product.
  • This imposed extension is determined in the manner usual taking into account the characteristics of the product and machine and staying in areas of predetermined voltage stresses.
  • the mathematical model 80 develops, on the one hand, an extension instruction and, on the other hand, instructions nesting of the different organs.
  • the elongation instruction is displayed at input 76a a device 76 for adjusting the drive mechanism 21 of the tensioning blocks 2, 2 ', such a mechanism allowing, in known manner, to maintain between the blocks upstream and downstream the speed difference corresponding to the imposed extension.
  • the elongation setpoint A depends on the diameters of the tension rollers in the upstream blocks 2 and downstream 2 'and can therefore be corrected by a device 83 to take into account the possible wear of these.
  • the installation is equipped with devices 22, 23, for measuring the voltages respectively Te at the input and Ts at the output, and the measured voltages are displayed at the input 82a of a device 82 of correction of instructions. If exceeded at predetermined values, the automation system can thus react, either by simple alarm or by action direct on all or part of the instructions it develops.
  • the nesting instructions P1, P2 ... P5 developed by the mathematical model 80 and thus corrected, are displayed, respectively, on the positioning means 71 to 75.
  • the mathematical model holds account of the interactions between the different organs for develop the nesting instructions so that the elongation imposed for the flatness correction either practically entirely carried out in the leveler 3 at by means of the two bending units 30, 30a, or one of them only, as the case may be.
  • the tensile-bending effect applied to the product depends on the diameters of the cylinders and rollers and this is why, before being displayed on each of the means 71 to 75, the corresponding setpoint is corrected in a device 84 associated with each means of positioning to correct the setpoint according to actual diameters of cylinders or rollers of the member considered, which can be measured, for example, at each machine shutdown.
  • the adjustment system can operate fully automatically, but with possibility of correcting instructions on intervention of operator to adjust nesting.
  • measuring devices M1 to M5 are associated with each organ and each provide a signal representative of the actual position, at the instant considered, cylinders or rollers of the corresponding member.
  • These signals are displayed on input 85a of a self-adaptation system 85 which, on the operator's order, may intervene on the automation system to correct nesting instructions automatically so that these correspond to the positions measured and that the operator corrections are maintained until the end of the reel as well as for the following coils of the same type.
  • the elongation actually achieved is measured. and displayed on input 85b of the self-adaptation system who can thus correct, depending on the effects observed, the elongation setpoint previously displayed on the mathematical model 80.
  • the self-adaptation system 85 is a system classification and management IT that records all settings, classifies the results and allows choose the optimal values for the band being treatment.
  • console 81 unlock the system self-adaptation by means of a dialogue link 86 man / machine to introduce into the automation system the corrected instructions which will thus be used for the continuation of the reel and for the reels of the same type.
  • the self-adaptation system 85 allows, from a mathematical model established for some almost immediately find the right products adjustments for new products or to adapt the system with new, more efficient instructions.
  • the operator can also know the faults of flatness to be corrected, for example if they are usual in a type of product. But he can also measure them using a device placed upstream of the installation. From tables or abacuses, or according to instructions data by a calculation system, the operator determines the elongation to be imposed in the leveler 3 to correct these faults. This elongation is displayed on the input 80c of the mathematical model 80 which, from programmed equations, determines the voltage imposed by the tensioning blocks 2, 2 ', and the theoretical positions of planing equipments 30, 30a, allowing to realize the lengthening imposed for leveling.
  • the model math also calculates the effects of camber transverse and longitudinal theoretically resulting from actions performed for planing and chooses a combination of tension and bending in the leveler to minimize camber.
  • residual effects are calculated and corrected in the multi-roller assembly 5 and, optionally, the anti-tile device 4, the nestings of which are determined by the mathematical model taking into account all the interactions between the elements of installation and so that the additional elongation made in the multi-roller assembly does not exceed 0.2%, the tension stress barely increased there.
  • the leveling result can be verified by tests performed on the tape leaving the installation and possibly cut into strips. Measures of the longitudinal or transverse camber could, possibly be performed while scrolling the band. Finally, the operator can also, by direct observation, observe imperfections and residual tape defects.
  • the operator preferably acts on the least sensitive actuators which give greater adjustment latitude.
  • it can vary first of all the nesting A2 at the end of the set multi-rollers to increase or decrease the number and the intensity of degressive flexions and, if necessary, act on the nesting A1 at the entry, this setting being more sensitive.
  • the operator can also intervene on the levelers 30, 30a, and possibly the anti-tile device 4, using push buttons B1 to B3, so that take into account the interactions between the two parts of the installation and perfect the leveling according to real characteristics and properties of the tape in course of progress.
  • the corrections made are saved and optimized in the self-adaptation system 85.
  • the competent authority considers, after verification, that the settings made are valid for all tapes of the type in progress, for example for all strips of the same thickness and classified in a same category, these settings are validated by the command 85c and, after unlocking the self-adaptation system 85, the corrections previously made and judged are introduced into the model memory mathematical so that, subsequently, the instructions corrected be imposed on other bands of the same category.
  • corrections can be made after validation, to the values found in the self-adaptation system 85.
  • a new coil does not does not correspond to a known type
  • the mathematical model 80 adjusts the tensions and nesting according to the displayed parameters and then controls the unwinding of the reel.
  • the operator can determine, by measurement or observation and from experience clean, the corrections that should be made to overlaps determined by the mathematical model. If the result is satisfactory, these corrections are validated by the competent authority and stored in the mathematical model which thus constitutes a new model subsequently applicable to all coils of the same type.
  • leveler could have only one leveling crew 30.
  • the second crew can be placed on the machine and simply put out of service when unnecessary. But we can also, for certain types of products, use a single machine single crew.
  • the multi-roller assembly can correct the tile defect and in some cases we could therefore remove the anti-tile device 4.
  • the arrangement of different organs as well as the order and number of active rollers of the multi-roller assembly 5 will determined according to the characteristics, in particular thickness and hardness, from product range to treat, normally, in the installation.
  • the upper row of rollers 51 usually has one roll less than the row lower 51 ', as shown in Figures 1 and 2, and the first active roller, on which the strip is completely tense, is often the second in the series, but this provision could be modified according to targeted deformations.
  • the two rows could have the same number of rollers, as in the case of Figure 3, or the longest row could be the top row.
  • Deflector roller 45 located just after the anti-drug can also be interchangeable and / or smaller diameter, and adjustable in height so as to make it more or less active compared to a simple deflector.
  • a set of 9 means measuring devices downstream of the output tensioner block 2 ' and comprising, for example, a device 91 for measuring residual flatness defects, for example from voltage constraints, a device 92 for measuring tile, for example by laser, and a device 93 for measuring of the defect in longitudinal camber or "arch", the measurements performed being displayed on the auto-adaptation system 85 which determines correction instructions possible.
  • the flatness measurement performed in 91 can determine a correction on the elongation imposed.
  • Detection of tile or camber faults longitudinal can lead to a correction of nesting, in priority over nesting A2 downstream of the multi-roller assembly 5 and, if necessary, on the nesting A1 at the entrance or on the nesting of the anti-tile device 4 when used.
  • the belt tension can also be measured at the outside of the installation by blood pressure monitors 94, 95, placed respectively upstream of the input tensioning block 2 and downstream of the output block 2 '. From these measurements external voltages, the automation system 8 can modify the elongation instructions if the coefficients tensor block multipliers become too important. Actions on exterior pull-ups can also be considered in the system, depending production contingencies and capacity regulation of parameters outside the installation.
  • a possible measurement of the intermediate voltage, by example in 96, upstream of the multi-roller assembly 5, can optionally be used to correct nesting of the leveling crews 30, 30a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)

Claims (15)

  1. Verfahren zum Richten mit Zugspannung eines dünnen Metallbandes (1) in einer Anlage bestehend aus einer Biege-Zug-Richtvorrichtung (3) mit mindestens einer Biegeeinheit (30) mit zwei höhenmässig versetzten Richtrollensätzen (31, 32) und einer Mehrrollen-Richteinheit (5) mit zwei Rahmen, je einem oberen (6) und einem unteren (6') Rahmen, die jeweils eine Reihe Rollen (51, 51') mit parallelen, in Längsrichtung und in der Höhe versetzten Achsen zwecks Bestimmung, durch Überlappung der Rollen, einer gewellten Bandstrecke mit Wechselbiegungen, Einstellmitteln der Überlappung der Richtrollensätze (31, 32), Mitteln zum Beaufschlagen des Bands (1) mit einer Zugspannung und Einstellmitteln der Überlappung der Rollen (51, 51') der Richteinheit (5) durch Kippen einer Reihe Rollen (51') gegenüber der anderen (51) zwecks Bestimmung degressiver Rollenüberlappungen zwischen dem Einlauf und dem Auslauf der Mehrrolleneinheit (5), die allmählich abnehmende Wechselbiegungen bewirken , welche mindestens den beim Durchlauf durch die Biege-Zug-Richtmaschine (3) hervorgerufenen Längswölbungsfehler korrigieren können, dadurch gekennzeichnet, dass die Zugspannung durch zwei jeweils vor der Biege-Zug-Richtmaschine (3) bzw. hinter der Mehrrollen-Richteinheit (5) angeordnete Spannungsblöcke (2, 2'), unter Beibehaltung einer Differenz der Durchlaufgeschwindigkeit zwischen diesen vor (2) bzw. dahinter (2') angeordneten Spannungsblöcken, die einer aufgezwungenen Banddehnung zur Korrektur der Planheit entspricht, angelegt wird und dass die Durchlaufgeschwindigkeiten in den beiden Spannungsblöcken (2, 2'), die Überlappung der Richteinrichtungen (31, 32) der Richtmaschine (3) und die degressiven Überlappungen der Rollen (51, 51') der Richteinheit (5) durch ein Automatiksystem (8) mit einem zugeordneten mathematischen Modell (80) eingestellt werden, das die wesentlichen dimensionnellen, strukturellen und qualitativen Daten des Erzeugnisses (1), die bekannten Durchmesser der Wirkwalzen, die auf das Band einwirkenden Spannungen zur Erzielung der aufgezwungenen Dehnung und die Wechselwirkungen zwischen den verschiedenen Organen der Anlage berücksichtigt, so dass die aufgezwungene Dehnung bereits am Auslauf der Biege-Zug-Richtmaschine (3) praktisch realisiert ist und der Längswölbungsfehler in der Mehrrolleneinheit (5) ohne wesentliche Erhöhung der bereits erzielten Dehnung in der Biege-Zug-Richtmaschine (3) korrigiert wird.
  2. Richtverfahren nach Anspruch 1, dadurch gekennzeichnet, daß der querverlaufende Rinnenfehler gleichzeitig mit dem Längswölbungsfehler in der Mehrrolleneinheit (5) korrigiert werden kann.
  3. Richtverfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Korrektur des querverlaufenden Rinnenfehlers mindestens teilweise in einer zwischen der Richtmaschine (3) und der Mehrrolleneinheit (5) angeordneten Vorrichtung (4) erfolgt, um mindestens teilweise den querverlaufenden Rinnenfehler vor dem Einlauf in die Mehrrolleneinheit (5) zu korrigieren.
  4. Richtverfahren nach einem der Ansprüche 1, 2, 3, dadurch gekennzeichnet, daß die Achsenabstände der Richtrollensätze (31, 32) unter Berücksichtigung der dimensionnellen und der strukturellen Daten des Bandes (1) so eingestellt werden, daß in der Richtmaschine (3) die aufgezwungene Dehnung zur Korrektur der Planheit unter Beibehaltung der auf das Band einwirkenden Zugspannung unter ca. 60% der Dehngrenze des Metalls gehalten wird.
  5. Richtverfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Überlappungen jeweils einlaufseitig bzw. auslaufseitig an der Mehrrolleneinheit (5) zur Korrektur der Wölbungsfehler unter Begrenzung der Zugkrafterhöhung so eingestellt werden, daß die in der Mehrrolleneinheit (5) erzielte zusätzliche Dehnung 0,2% nicht übersteigt.
  6. Richtverfahren nach Anspruch 1, dadurch gekennzeichnet, daß dem Automatiksystem (8) Tabellen und ein mathematisches Modell (80) zugeordnet sind, das vor der Behandlung einer Rolle sämtliche dem zu behandelnden Erzeugnis (1) eigenen und der Anlage eigenen Daten anzeigt, wobei das mathematische Modell (80) die Überlappungssollwerte der verschiedenen Organe aus programmierten Gleichungen unter Berücksichtigung der durch Messung oder durch Beobachtung der erhaltenen Angaben über die verbleibenden Planheits-, Längs- und Querwölbungsfehler bei der Behandlung eines Bandes ähnlicher Art und Abmessungen erarbeitet.
  7. Richtverfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Automatiksystem (8) die Überlappungen der verschiedenen Organe für jede Erzeugnissorte aus erstellten Tabellen, unter Berücksichtigung der Eigendaten der Maschine und der durch Messung oder Beobachtung der vorher erzielten Angaben über die verbleibenden Planheits-, Längs- und Querwölbungsfehler bei der Behandlung eines Bandes ähnlicher Art und Abmessungen bestimmt.
  8. Richtverfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Bediener jederzeit die jeweiligen durch das Automatksystem (8) gesteuerten Einstellungen entsprechend den am Erzeugnis (1) vor oder nach der Behandlung durchgeführten Messungen oder Beobachtungen manuell korrigieren kann.
  9. Richtverfahren nach Anspruch 8, dadurch gekennzeichnet, daß die von Hand so durchgeführten Korrekturen in einem Selbstadaptierungssystem (85) registriert, geordnet, optimiert und gespeichert werden, das die notwendigen Änderungen nach Entriegelung durch den Bediener in das Automatiksystem (8) eingibt, so daß anschließend den verschiedenen Organen während des Bandablaufs und für die folgenden gleichartigen Bänder beim Auftreten derselben Bedingungen die so korrigierten Überlappungssollwerte vorgegeben werden.
  10. Richtverfahren nach Anspruch 9, dadurch gekennzeichnet, daß, nach Prüfung durch eine kompetente Stelle, mindestens einige der in dem Selbstadaptierungssystem (85) registrierten Korrekturen validiert und in das mathematische Modell (80) eingegeben werden können, das so nachgestellt wird, daß die erstellten Sollwerte den bereits korrigierten Überlappungen entsprechen.
  11. Richtverfahren nach einem der Ansprüche 9 und 10, dadurch gekennzeichnet, daß für die Behandlung einer Bandrolle, deren Daten denjenigen einer der bereits behandelten Rollen nicht entsprechen, unter diesen eine oder mehrere Bezugssorten gewählt werden, die der neuen Rolle am nächsten kommt und am Automatiksystem entweder die der am nächsten kommenden Art enstprechenden Parameter oder die interpolierten oder extrapolierten Parameter angezeigt werden, um somit entsprechend der Bezugsarten die Spannungs- und Überlappungssollwerte der verschiedenen Organe für die neue Rolle zu bestimmen, daß dann der Rollenablauf ausgelöst wird und der Bediener von Hand die durch das Automatiksystem (8) entsprechend den beim Ablauf am Band erzielten Wirkungen bestimmten Sollwerte korrigiert, wobei die somit eingebrachten Korrekturen in dem Selbstadaptierungssystem (85) registriert und auf Befehl des Bedieners in das Automatiksystem (8) eingegeben werden, um somit die für den weiteren Bandablauf und für die ähnlichen Bänder erarbeiteten Sollwerte zu korrigieren.
  12. Richtverfahren nach Anspruch 11, dadurch gekennzeichent, daß mindestens einige der von Hand eingebrachten Korrekturen durch eine kompetente Stelle validiert und in das mathematische Modell zu dessen Nacheinstellung und zur Bildung eines neuen an alle ähnlichen Bänder angepassten Modells eingegeben werden.
  13. Anlage zur Durchführung des Verfahrens nach einem der vorangehenden Ansprüche, bestehend aus einer Biege-Zug-Richtmaschine (3) mit mindestens einer Biegeeinheit (30) mit zwei höhenmässig versetzten Richtrollensätzen (31, 32), Mitteln (36') zur Einstellung der Überlappung der Richtrollensätze (31, 32), einer Mehrrollen-Richteinheit (5) mit zwei in Längsrichtung und in der Höhe versetzten Reihen Rollen (51, 51') zur Bestimmung, durch Überlappung der Rollen, einer gewellten Bandstrecke mit Wechselbiegungen und Einstellmitteln der Überlappung und der relativen Höhe der beiden Reihen Rollen (51, 51'), wobei mindestens eine (51') dieser Reihen Rollen durch einen Sattel (6') abgestützt ist, der um eine zu den Rollenachsen parallele Horizontalachse kippbar montiert ist und dem Mittel (63, 64, 66) zur senkrechten und kippbaren Bewegung des Sattels (6') zugeordnet sind zwecks Einstellung des Rollenüberlappungen der beiden Reihen (51, 51') durch Änderung des Achsenabstände an der Einlaufseite A1 bzw. der Auslaufseite A2 der Mehrrolleneinheit (5), um somit in der Durchlaufrichtung degressive Rollenüberlappungen zu bestimmen, die allmählich abnehmende Wechselbiegungswirkungen hervorrufen, und Mittel zum Beaufschlagen des Bands (1) mit der Zugspannung, dadurch gekennzeichnet, daß die Zugspannungs-Beaufschlagungsmittel aus zwei Spannungsblöcken (2, 2') bestehen, die je vor der Biege-Zug-Richtmaschine (3) bzw. hinter der Mehrrollen-Richteinheit (5) angeordnet sind und denen Einstellmittel (21) der Durchlaufgeschwindigkeiten in diesen Spannungsblöcken (2, 2') zugeordnet sind, um somit eine dem Band zugeteilte Dehnung (1) für die Planheitskorrektur bestimmen zu können, daß die Anlage Positioniermittel (71 bis 75) aufweist, denen Einstellmittel (36') der Überlappung der Richtrollensätze (31, 32) und Einstellmittel (63, 64, 66) der Überlappungen der Mehrrolleneinheit (5) zugeordnet sind, und ein automatisches Steuerungssystem dieser Positioniermittel (71 bis 75), bestehend aus einem mathematischen Modell (80), auf dem die der Maschine eigenen bzw dem zu behandelnden Erzeugnis eigenen Parameter über ein Pult (81) angezeigt und Überlappungssollwerte je der Richtrollensätze (31, 32) bzw. der Mehrrollen-Richteinheit (5) erarbeitet werden können, und daß diese Positioniermittel (71 bis 75) je ein Regulierungsmittel bilden, dem an einem ersten Eingang (71 a bis 75a) ein durch das mathematische Modell (80) erarbeiteter Positionierbefehl und an einem zweiten Eingang (71b bis 75b) ein Meßsignal der wirklichen Position des entsprechenden Organs angelegt wird, wobei diese Positioniermittel (71 bis 75) jeweils die entsprechenden Mittel (36', 63, 64, 66) zur Einstellung der Überlappungen zwecks Anpassung der gemessenen Lage an den entsprechenden Überlappungssollwert steuern.
  14. Richtanlage nach Anspruch 13, dadurch gekennzeichnet, daß den Einstellmitteln (21) der Durchlaufgeschwindigkeiten der Spannungsblöcke (2, 2') eine Einstellvorrichtung (76) zugeordnet ist, die den Geschwindigkeitsunterschied zwischen diesen Spannungsblöcken bestimmt, der einem in dem mathematischen Modell (80) erarbeiteten Dehnungssollwert entspricht, wobei dieser Sollwert entsprechend dem bekannten Rollendurchmesser der Spannungsblöcke (2, 2') korrigiert werden kann.
  15. Richtanlage nach einem der Ansprüche 13 und 14, dadurch gekennzeichnet, daß sie Mittel (B1 bis B5) zur manuellen Einstellung der Überlappungen der verschiedenen Organe (30, 4, 5) und ein Selbstadaptierungssystem (85) umfaßt, das die von Hand durchgeführten Korrekturen ordnen und speichern kann, wobei dieses Selbstadptierungssystem (85) über eine Verbindung mit einem Verriegelungssystem an das mathematische Modell (80) angeschlossen ist und wobei dessen Entriegelung über eine Verbindung Mensch / Maschine (86) zur Eingabe, und nach evtl. Validierung, zur Speicherung in dem mathematischen Modell (80) der einer Erzeugnissorte entsprechenden, durch das Selbstadaptierungssystem (85) optimierten Korrekturen steuerbar ist.
EP95400163A 1994-02-01 1995-01-25 Verfahren und Vorrichtung zum Richten eines dünnen Metallbandes Expired - Lifetime EP0665069B1 (de)

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DE69514010T2 (de) 2000-06-08
EP0665069A1 (de) 1995-08-02
US5666836A (en) 1997-09-16
FR2715592B1 (fr) 1996-04-12
JPH0833919A (ja) 1996-02-06
FR2715592A1 (fr) 1995-08-04

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