EP0765196B1 - Levelling machine with overlapping rollers, and method for using same - Google Patents

Levelling machine with overlapping rollers, and method for using same Download PDF

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Publication number
EP0765196B1
EP0765196B1 EP96913592A EP96913592A EP0765196B1 EP 0765196 B1 EP0765196 B1 EP 0765196B1 EP 96913592 A EP96913592 A EP 96913592A EP 96913592 A EP96913592 A EP 96913592A EP 0765196 B1 EP0765196 B1 EP 0765196B1
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EP
European Patent Office
Prior art keywords
rolls
girder
levelling
jacks
roll
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EP96913592A
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German (de)
French (fr)
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EP0765196A1 (en
Inventor
Michel Chevet
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Clecim SAS
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VAI 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
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers

Definitions

  • the subject of the invention is a leveler with nested rollers. for a strip product according to the preamble of claim 1, more specificaly of metal strips and a method for adjusting the leveling effect performed on a strip using such a leveler according to the preamble of claim 16.
  • multi-roller leveler For leveling flat products and, in in particular, metal strips such as laminated sheets, we often use a machine called multi-roller leveler comprising two series of rollers with parallel axes, respectively forming two leveling crews between which we do scroll the strip to be leveled in one direction longitudinal perpendicular to the rollers. These are offset longitudinally and vertically by so as to overlap by determining a wavy path of the tape which is thus subjected to the effects of traction-bending in alternating directions on both sides and others of an average plan of scrolling substantially horizontal.
  • the whole is placed in a support cage fixed with two uprights apart and is associated with adjustment means making it possible to modify the nesting of the rollers to adjust the efficiency of the leveling according to needs and characteristics of the strip, in particular its dimensions and the nature of the metal.
  • each leveling crew placed, respectively, on each side of the passage plane of the strip is generally supported on a cross member resistant forming a box spring and extending over all the grip of the leveling crew.
  • the cross member constituting the upper box spring is mounted sliding vertically between the uprights of the support cage, its position being adjustable by mechanical or hydraulic actuators mounted at angles of the cage and allowing to adjust the level of the upper box spring and adjustable crew relative to the fixed lower crew. If needed, the actuators can be adjusted differently, from way to determine a forward or backward tilt or a swaying of one of the crews compared to the other, for example to reduce the overlapping of rollers in the direction of travel of the strip.
  • each active roller is applied, through its rollers support, on an individual crosspiece taking support directly on the amounts of the cage.
  • the bending of each cross member can be compensated for by means of an adjustable thickness shim inserted between each cross member and the support rollers, and consisting of two dishes with inclined faces forming corner, whose thickness can be increased, in the central part, by means of an eccentric, so as to maintain the straightness of the corresponding active roller.
  • each roll of leveling is supported by a system with adjustable thickness corners, on a frame of support which supports itself on the angles of the bed base by fixed wedges placed in the axis of the four leveling cylinders for the level of the bed base.
  • Two rows of flat cylinders distributed between said fixed wedges are interposed between the box spring and the chassis of each leveling crew, respectively on the entry and exit side of this one, the distribution of pressures between said flat cylinders being adjusted to compensate for the bending of the bed base under the effect of the applied forces to maintain the straightness of the support frame and, therefore leveling rollers which take support on it.
  • This adjustment can be carried out under load and is therefore possible to maintain the flatness of the chassis and, therefore, the degree of nesting of the rollers, by adapting to variations in applied forces during operation.
  • the inventor had the idea that would be desirable to have the possibility not only to take account of foreseeable deformations of the machine but also to distribute the load the leveling effect to correct the defects of flatness detected on the tape. Now in the machines used so far, it is simply intended to compensate for cedings to maintain parallelism rollers and the degree of nesting that is set to advance.
  • the invention therefore aims to solve all the problems that have just been exposed thanks to simple and robust devices, likely to resist leveling forces extremely important, for example for leveling cold metal sheets and not allowing only to compensate for all cedings, but also to act precisely on the distribution of leveling stresses applied to the strip at level of each of the active rollers, this distribution can be changed even during tape scrolling.
  • a leveler with nested rollers for a strip product moving next a longitudinal direction of travel including, inside a fixed cage, two roller leveling crews separated parallels, placed on either side of the strip with offset rollers defining a wavy path on either side of a mean plane of tape running, each leveling crew comprising a plurality of rotating rollers planing with parallel axes, each associated with at least a row of support rollers distributed over the whole its length, the assembly being mounted in a chassis of support and applied, on the side opposite the strip, on a resistant box spring resting on the fixed cage, characterized by the fact that the support frame at least one of the leveling crews comprises a frame-shaped part inside which are arranged, one next to the other, a plurality of transverse beams in number equal to that of leveling rollers, slidably mounted in said frame, independently of each other, each along a clamping plane passing through the axis of the corresponding leveling roller, each active roller leveling bearing
  • each leveling roller is rotatably mounted at its ends on two bearings centering connected respectively to the ends correspondents of the associated beam, in a way allowing a limited relative displacement of said roller bearings in relation to the beam under the action of said hydraulic cylinders.
  • the leveler includes means for adjusting the position of each of the cylinders interposed between the box spring and each cross beam for individual adjustment level profile of at least some of the rollers leveling assets relative to the mean plane of tape scrolling.
  • the cylinders can also be set simultaneously, either to determine individually the level of each of the rollers active, or to act globally on nesting rollers.
  • the machine includes means for adjusting the pressure of each of the cylinders interposed between the box spring and each cross beam for individual adjustment of the clamping force supported by at least some leveling rollers.
  • each transverse beam has a width at most equal to the distance between the axes of the leveling rollers and the support cylinders of each beam on the bed base each have a elongated section, each cylinder having a piston whose width across the beam does not not significantly exceed the width thereof and whose length is determined to define a useful section of the cylinder chamber compatible with the support effort to exercise taking into account the number of cylinders acting on each beam.
  • each transverse beam takes support on the box spring via three cylinders, respectively a central cylinder and two cylinders lateral, said jacks being associated with a means of adjusting the position of the central cylinder for the nesting adjustment of the corresponding roller and means for correcting the relative positions of the two other cylinders to control the roll profile and its variation under the effect of the applied forces.
  • the support cylinders are provided in at least one piece of intermediate support interposed between the box spring and the set of transverse beams, and in which are housed the cylinders, the latter being arranged in several rows parallel to the beams transverse.
  • the cylinder bodies placed at the same level on the different cross beams are gathered in a single piece spanning all of the beams and in which recesses are provided constituting the chambers of the jacks and in which sliding pistons are supported on the corresponding beam.
  • the support frame includes a rectangular frame surrounding all of the rollers and associated with a plurality of guide partitions separated one of the other so as to limit flat spaces in which are housed the transverse beams, each being provided, at its two ends, with means of support on the frame with possibility of sliding.
  • the entire support frame is closed, on the side opposite the roller, by a plate covering the set of transverse beams so as to form a housing, said plate being provided, at the right of each beam, of a plurality of passage orifices pistons of the cylinders interposed between each beam and the box spring. The whole thus forms a cassette which can be removed from the leveler by translation in a direction parallel to the axes of the rollers.
  • a method of adjusting the leveling effect carried out on a strip using a roller leveler nested according to the invention is defined in claim 16.
  • the position is adjusted of one of the box springs relative to the other for determine a baseline of the set of the leveling crew relative to each other and, each leveling roller being mounted, with its rollers support, on a transverse beam mounted sliding perpendicular to the passage plane of the band and bearing on the corresponding box spring through at least two cylinders hydraulic levels are precisely determined relative of at least one group of leveling rollers relative to the reference level, by setting individual positions of the support cylinders corresponding to each of the rollers, so that define a specific degree of nesting of each of the rollers of said group, the pressures applied to each of said cylinders being limited to a value of safety corresponding to a maximum leveling effort cashed by each of the leveling rollers.
  • each support beam of a leveling roller is associated with at least three support cylinders, respectively a central cylinder and two side cylinders.
  • the leveler includes an odd number n of nested rollers, respectively (1, 3, 5 .... n) on one of the crews and (2, 4, 6 ... n-1) on the other crew, we adjust position the cylinders corresponding to at least two rolls, respectively (p) and (q) of each of the two crews, placed respectively above and in below the strip and the pressure is adjusted cylinders corresponding to the two pairs of rollers, respectively (p-1, p + 1) and (q-1, q + 1) which frame each of said rollers (p, q) adjusted in position so as to determine at least two curvatures in directions reverse on said rollers (p and q), the locations of these in each of the two crews and their relative levels compared to reference level, as well as the pressures applied to the rollers that frame them, being determined based on the characteristics of the strip to be leveled so as to achieve the leveling effect wish.
  • Figure 1 is a general view of an embodiment of a leveler according to the invention, in partial section along a plane transverse to the direction of travel.
  • FIG. 2 is an enlarged view, of the leveler, in longitudinal section, along a plane median parallel to the direction of travel.
  • Figure 3 is a detailed diagram, in perspective, with partial snatch.
  • Figure 4 is an overall circuit diagram actuator control.
  • Figure 5 shows schematically an arrangement especially leveling rollers.
  • FIGs 1 and 2 there is shown the whole of a leveler comprising a fixed cage 1 consisting of two spaced apart uprights 11, 11 'connected by spacers 12 and fixed to their base 13 on a foundation block 14.
  • the lower cross-member 3 ' is fixed and rests directly on the base 13 of the cage 1.
  • the upper crosspiece 3 is adjustable in height and can slide vertically under the action of four hydraulic cylinders or mechanical 15 provided at the upper part of the uprights 11, 11 '.
  • Each of the crosspieces 3, 3 ' is made so particularly rigid and forms a resistant box spring defining a substantially planar bearing face 32, 32 '.
  • two box springs 3, 3 ' are arranged two planing crews, respectively upper 2 and lower 2 ', placed on either side of a plane P of passage of the strip to be leveled A and bearing on the opposite side, on the bearing faces 32, 32 ' respectively of the upper box spring 3 and the box spring lower 3 '.
  • Each leveling crew 2, 2 ′ comprises a plurality of active rollers 21 spaced from each other others and whose axes are perpendicular to the direction x'-x of movement of the product to be leveled.
  • Each active roller 21 is rotatably mounted at its two ends, on two bearings 23 defining an axis of rotation 20 of the roller and rests on rollers or support rollers 22, the assembly being mounted in a support frame which is applied against the box spring 3.
  • the upper crew 2 includes four active rollers 21 each associated with two rows of support rollers 22 centered respectively on two axes symmetrically spaced on either side of a vertical plane of symmetry P1 passing through the axis of the corresponding active roller 21.
  • the lower 2 'unit includes five rollers active 21 'each associated with two rows of rollers support 22 'and whose axes are placed in vertical planes of symmetry P'1 which are offset by one half step with respect to the P1 planes of symmetry upper rollers 21, so that, so known, a metal strip passing along the longitudinal direction x'-x follows a wavy path, from on either side of a mean plane of travel P between the two rows of rollers 21, 21 ', the amplitude of the undulations depending on the degree of nesting of rollers 21, 21 '.
  • the support chassis 4 of each crew of leveling is constituted by a hollow piece 40 in the form frame in which several beams are housed transverse 5 arranged one beside the other at inside the frame 40 and each supporting one of the active rollers 21 and its support rollers 22.
  • the hollow part 40 therefore forms a section frame rectangular surrounding all the beams transverse 5 which can slide individually inside the frame 40, with the rollers and the pebbles.
  • the chassis 4 constitutes a form box rectangular bounded by two long sides 42 parallel to the planes of symmetry P1 and two small sides 43 perpendicular to said planes, and between which extend from the intermediate partitions 41 which limit, inside the frame 40, several elongated housings 45 in which are threaded, respectively, the transverse beams 5.
  • Each beam 5 is centered on a vertical plane of symmetry P1 passing through the axis of the corresponding active roller 21 and is provided at its two ends with projection 53, 53 'in which are housed, respectively, the two bearings 23, 23 'of the roller active 21.
  • each beam 5 is supported, at each of its two ends, by jacks 52, bearing on corresponding bearing parts on each lateral side 43 of the frame 4.
  • each active roller 21 is supported on two rows of support rollers 22a, 22b which are mounted rotating on intermediate supports 54 fixed on the lower part of the beam 5, around axes alternately discarded on either side of the plane vertical symmetry P1 of the beam.
  • each beam 5 has a rectangular cross section whose width is of the same order as the diameter of the roller 21 corresponding to and at most equal to the center distance of rollers and whose height is at least equal to the width and preferably much greater than this one.
  • each beam 5 forms, with the corresponding active roller 21 and its rollers support 22a, 22b, a relatively rigid assembly, suspended from frame 4 by jacks 52, 52 'and which can slide vertically inside its housing 45, along the plane of symmetry P1 which therefore constitutes a clamping plane of the active roller 21.
  • each beam 5 with its active roller and its support rollers can slide individually in its housing without interference with the movement of sliding neighboring beams.
  • each support beam 5 takes support on the bed base 3 independently of the beams neighbors through a row of several cylinders 6 which are interposed between each beam 5 and the application face 32 of the bed base 3 and distributed over the entire length of the beam 5.
  • the jacks 6 are housed in a room 33 in mechanically welded construction, which covers the entire face application 32 of the bed base 3 and in which the cylinders 6 are arranged in several rows corresponding respectively to each of the beams transverse 5, each cylinder 6 comprising a piston 62 and a body 61 housed in the intermediate part 33.
  • each cylinder 6 preferably uses cylinders with a cross-section elongated, the piston 62 of each cylinder 6 having a width slightly less than that of beam 5, but covering, in the longitudinal direction of the beam 5, a much greater length.
  • the piston and the chamber corresponding 64 have an elongated section having, from preferably circular rounded ends of so as to have an oblong shape, as we have shown schematically in Figure 3.
  • each cylinder we can thus considerably increase the useful section of each cylinder and obtain a force sufficient using only a reduced number of cylinders per beam, the length of each cylinder being determined to define a useful section of the cylinder chamber compatible with the bearing force at exercise given the number of cylinders acting on each beam.
  • each beam 5 can be associated with only three cylinders, respectively a central cylinder 6a centered in the plane median of the leveler and two lateral cylinders 6b and 6c.
  • the bodies 61 of all the jacks placed respectively on the same level on each of the beams parallels 5 can be grouped in one room single 61 ', which spans the entire width of the box spring 3 in the same groove-shaped recess 34.
  • this room 61 ' are arranged several bores centered respectively in the median planes P1 of the different beams 5 and each constituting the chamber 64 of a jack whose piston 62 is supported on the upper face 55 of the beam 5 corresponding.
  • circuits oil supply and outlet are arranged in the room 61 '.
  • each cylinder 6 is associated with a sensor. position 63 housed in room 61 '.
  • the support beams 5 of the active rollers 21 may have a height significantly greater than their width, which gives them relatively high rigidity and allows distribution over the entire length of the active roller, the effects of adjustment cylinders, without hindering the sliding of all.
  • Each beam 5 is indeed, perfectly laterally held in the housing 45 corresponding to frame 4 and resists elastically and without risk of buckling to the actions exerted by the cylinders 6, the effects of which on active rollers 21 can therefore be extremely precise.
  • the lower leveling crew 2 'taking support on the lower base 3 ' is made in a way completely analogous, but is normally fixed in height while the general level of the box spring upper 3 with upper leveling crew 2 can be adjusted in height, by means of jacks 15.
  • the frame 4 is closed, at its part upper, by a plate 43 which covers the assembly beams 5 and in which are provided, at right of each beam 5, rows of orifices 44 of passage of pistons 62.
  • the frame 4 forms a housing containing all the beams 5 with the rollers 21 and their support rollers 22 which can advantageously constitute a removable cassette.
  • This is applied and removably attached against the box spring 3 by clamps 35 actuated by jacks 36 bearing on the base 3, the upper plate 43 bearing on the face application 32 of the bed base 3, through the parts 61 'constituting the bodies of the jacks 6.
  • each beam 5 is supported at its two ends on the sides 43 of the frame 4 by means of jacks 52, 52 '. These the latter are adjusted so as to support the weight of the beam 5 with the support rollers 22 and the active roller 21 corresponding and maintain the beam 5 applied against the corresponding cylinders 6, without opposing the sliding of the beam under the effect of said cylinders.
  • Each cassette constituted by frame 4, and the set of beams 5 and rollers 21 and rollers 22 associates, can be removed from the machine by a displacement parallel to the axes of the rollers and beams.
  • the lower cassette 4 ' is provided rollers 45 which can roll on rails 16 of adjustable height (figure 2).
  • the two leveling crews can be removed at the same time, the upper crew 2 resting on the crew lower 2 'by means of stops not represented.
  • the invention provides two means of adjusting the spacing of the crews of leveling and nesting of rollers.
  • the four jacks 15 allow define a reference level for the upper bed base 3 and the upper leveling crew 2 with respect to a lower level of the leveling crew 2 'defined by the lower base 3'.
  • each cylinder 6 is associated with a position sensor 63 and it is possible, first of all, to adjust in the same way and simultaneously all the cylinders corresponding to a support beam 5 to control the level of the corresponding active roller 21, for example, for vary the nesting rate and the amplitude of ripples, from the entry to the exit of the leveler.
  • Each cylinder 6 being associated with a position 63, it is possible, from the information given by the mathematical model, from adjust the respective cylinder positions so that correct the bending of the corresponding roller 21.
  • the position adjustment of the side cylinders 6b, 6c used to determine the level 21 corresponding active roller means and model mathematics determines, according to the efforts applied and all the parameters of installation, foreseeable transfer of the part corresponding to the box spring 3 and, consequently, the position of the central cylinder 6a enabling the straightness of the corresponding roller 21.
  • FIG. 4 there is shown diagrammatically, the command and control circuits of a machine leveling allowing such adjustments.
  • Each leveling roller being associated with three oblong cylinders 6, the machine therefore comprises in total twenty-seven cylinders that are powered by a circuit hydraulic 7 comprising, conventionally, a pump 70, a tank 71 and twenty-seven servo valves 72 each associated with one of the jacks 6.
  • the four support cylinders 15 of the upper box spring 3 are also supplied with oil, each via a servo valve 73.
  • figure 4 represents only two leveling rollers, respectively upper 21 and lower 21 ', each associated with a support beam 5, 5 'resting on the bed base correspondent 3, 3 'through a series of three cylinders 6, 6 ', only the servo valves 72, 72' corresponding to these six cylinders being represented with the corresponding circuits.
  • the hydraulic circuits which have been represented only very schematically, have all the usual organs for a normal operation, including limiters pressure mounted on the circuits corresponding to each row of cylinders. Therefore, the effort of leveling collected by each of the rollers, which corresponds to the sum of the pressures applied to the matching cylinders can be limited to a value of security, which avoids all risks of deterioration of the machine due, for example, to too uneven distribution of efforts between rollers.
  • Position control and of the pressure of each of the twenty-seven cylinders 6, 6 ' is ensured by an automatic regulation system 8 conventionally connected by a network of communication 9, to various control devices and such as a sequential controller 91 of control of successive planer operations, a auxiliary controller 92, and various interface elements 93, 94, allowing, in particular to the operator to determine or modify possibly the machine setting parameters and monitor the operation of it and the regulation system to intervene in the event of need.
  • Each support cylinder 6 of a beam 5 is associated, as we have seen, with a position sensor 63 and to a pressure sensor 65 which emits signals representative of the position of the piston 62 and of the pressure in the chamber 64 of the jack 6. These signals are applied to the corresponding inputs of the regulation system 8. This also receives signals corresponding, respectively, to the position and pressure of each support cylinder 15 of the box spring which are supplied by sensors of position 18 and pressure sensors 18 'associated with each of the cylinders 15.
  • the system regulator 8 After processing this information, the system regulator 8 issues correction orders which are applied to the control solenoids servo valves 72, 72 'and 73.
  • the regulation system 8 comprises a number of control units and regulation and, in particular, an automatic transfer compensation 81 comprising two parts 81a, 81b assigned, respectively, to the upper box springs 3 and below 3 ', a servo controller of position 82, a profile servo controller straight 83 and a control machine of horizontality 84, which are associated with each of the 5, 5 'beams.
  • an automatic transfer compensation 81 comprising two parts 81a, 81b assigned, respectively, to the upper box springs 3 and below 3 ', a servo controller of position 82, a profile servo controller straight 83 and a control machine of horizontality 84, which are associated with each of the 5, 5 'beams.
  • Figure 4 shows only the cylinder control loops of a beam 5 for supporting an upper cylinder 21 but the same circuits are associated with the cylinders corresponding to all the other rollers.
  • the regulatory system has to maintain the central position of each roller to its set value and control horizontality and straightness of the generator active on contact with the strip to be leveled.
  • horizontality you have to hear the basic level defined by the fixed bottom base 3 ', which may not not be strictly horizontal, due to cedings and possible deformations of the different supports.
  • the basic level therefore corresponds, empty, to the travel plane P defined by the rollers 21 'of the lower leveling crew 2 '.
  • the position of bed base 3 adjusted by means of the jacks 15 makes it possible to define a higher crew reference level 2 strictly parallel to the basic level of the lower crew 2 'and in relation to which will be made the nesting adjustments of the rollers the objective being to make a sheet metal perfectly rectangular section maintaining the straightness and parallelism of active generators rolls of the two crews, respectively upper and lower.
  • the sensors 63 of each of the cylinders 6 make it possible to know, at all times, the position of the piston 62 relative to the body 61 of the cylinder but, due to the elastic deformations of the mechanical elements under the action of the different forces, the measured values do not do not directly represent the position of the active generators of the corresponding leveling roller 21 and must therefore be corrected by the yielding compensation machine 81, taking account of the width L of the product in the elasticity matrix 810.
  • the machine compensation 81 multiplies the leveling force measurement vector F, corresponding to the sum of the pressures of the three jacks measured by the sensors 64, by the elasticity matrix 810 of the mechanical assembly to obtain the correction to be made to the desired position X 0 , corresponding to the leveling force at the level of the roller considered, which is determined by the mathematical model of the regulation system 8.
  • the controller 81a thus forms a signal corresponding to the effective position X of the active generator of the roller in question, which is displayed on the regulator 82.
  • the latter determines the difference between the effective position X to be ensured and the position measured by the corresponding sensor 63 and emits a signal for correcting the position setpoint of the central cylinder 6a which is displayed on the corresponding servo-valve 72a so as to obtain the correct position X of the roller 21 at the center of the latter.
  • the horizontality control machine 84 includes a comparator 86 which receives, on its two inputs 84b, 84c the signals emitted by the sensors of position 63b, 63c, corresponding to the positions of the two cylinders 6b, 6c relative to the reference level defined by the upper base 3.
  • the gap between these two signals is sent in addition or in less on orders for servo valves 72b, 72c associated respectively with the two lateral jacks 6b, 6c so as to permanently reduce this difference to zero.
  • Signals representative of pressures in the three cylinders 6a, 6b, 6c measured by the sensors 65 correspondents are displayed at the entry of the rectilinear profile servo controller 83 which includes a regulator 87 of type P.I.D. associated to 88 comparators to ensure the distribution between the pressures of the three cylinders such that in the event that the force of metal reaction is uniform across the width, the active generator of the roller 21 is rectilinear.
  • the relationship between the force at the center and the forces side is a function of the width L of the sheet glided.
  • the difference between the sum of the lateral forces and the corresponding setpoint is formatted by the P.I.D. 87 which emits a correction signal acting simultaneously on the lateral servo valves 72b, 72c and, in the opposite direction on the servo valve central 72a, so as to cancel this difference.
  • control in position and in pressure of the support cylinders of each of the rollers allows to determine an optimal wavy profile by making the bends necessary for good leveling operation.
  • the cylinders corresponding to all rollers can be adjusted in position so as to define, on the rollers successive, decreasing curvatures from entry to the exit of the leveler, the pressures in the cylinders being adjusted so as to limit the effort supported by each of the rollers.
  • rollers having, for example, a position fixed determined by adjustment in position of their cylinders while other rollers can adapt to the undulations defined by the fixed rollers in exerting on the sheet an effort determined by simple pressure adjustment of the corresponding cylinders.
  • Figure 5 shows schematically a nine roller leveler in which only the cylinders corresponding to the rollers R1, R2, R5, R8 and R9 are set in position, the cylinders of the other rollers R3, R4, R6, R7 being simply adjusted in pressure so as to apply to sheet metal a determined effort but without fixing the position of the corresponding roller.
  • each of the rollers R2, R5, R8 of fixed position is framed by two rollers placed the other side of the band and set only in pressure in order to exert on the band, on the part and on the other side of the fixed roller, forces which determine a certain curvature depending on the characteristics tape and applied pressures.
  • Each group of three rollers determines a curvature, one way or the other, on the roller fixed corresponding and this results in a ripple at three alternating curvatures whose profile depends on the web stiffness, fixed roller positions R2, R5, R8 and pressures applied by others rollers.
  • the transition from a curvature to the next depends on the characteristics of the tape and it note that the curvatures are not necessarily centered on the fixed rollers.
  • the mathematical model can, in function of the different parameters and in particular the nature of the metal and the dimensions of the strip, define an optimal wave profile which is not necessarily related to the number of rollers and their the regulatory system determining the positions and pressures to be assigned to the different rolls according to the rank of each of them for get the desired profile.
  • An essential advantage of the invention therefore lies in the fact that the profile of the undulations can be freely modified by simply adjusting the levels and the pressures applied to all the rollers.
  • each beam could be associated with only two cylinders allowing to adjust the level and possible inclination of the roller corresponding asset. Conversely, we could use more cylinders, especially if gives them a circular section.
  • section cylinders elongated, especially oblong has the advantage essential to obtain the largest active surface and therefore the maximum effort for a number minimum of cylinders distributed over the entire surface of the beam facing the box spring.
  • the invention is, moreover, applicable to all types of multi-roller levelers, crews leveling may include a number more or less large of rollers. Besides, these should not necessarily be associated each with a beam of support and adjustment cylinders, some of rollers can be fixed. Such a solution is not covered by the claims.
  • the installation can be adapted to formats and characteristics of the sheets, and able to perform all necessary corrections.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Advancing Webs (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Description

L'invention a pour objet une planeuse à rouleaux imbriqués pour un produit en bande selon le préambule de la revendication 1, plus spécialement de bandes métalliques et un procédé de réglage de l'effet de planage effectué sur une bande utilisant une telle planeuse selon le préambule de la revendication 16.The subject of the invention is a leveler with nested rollers. for a strip product according to the preamble of claim 1, more specificaly of metal strips and a method for adjusting the leveling effect performed on a strip using such a leveler according to the preamble of claim 16.

Pour le planage des produits plats et, en particulier, des bandes métalliques telles que des tôles laminées, on utilise souvent une machine appelée planeuse à multi-rouleaux comprenant deux séries de rouleaux à axes parallèles, formant respectivement deux équipages de planage entre lesquels on fait défiler la bande à planer suivant une direction longitudinale perpendiculaire aux rouleaux. Ceux-ci sont 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 de part et d'autres d'un plan moyen de défilement sensiblement horizontal.For leveling flat products and, in in particular, metal strips such as laminated sheets, we often use a machine called multi-roller leveler comprising two series of rollers with parallel axes, respectively forming two leveling crews between which we do scroll the strip to be leveled in one direction longitudinal perpendicular to the rollers. These are offset longitudinally and vertically by so as to overlap by determining a wavy path of the tape which is thus subjected to the effects of traction-bending in alternating directions on both sides and others of an average plan of scrolling substantially horizontal.

L'ensemble est placé dans une cage de soutien fixe comportant deux montants écartés et est associé à des moyens de réglage permettant de modifier l'imbrication des rouleaux pour régler l'efficacité du planage en fonction des besoins et des caractéristiques de la bande, notamment ses dimensions et la nature du métal.The whole is placed in a support cage fixed with two uprights apart and is associated with adjustment means making it possible to modify the nesting of the rollers to adjust the efficiency of the leveling according to needs and characteristics of the strip, in particular its dimensions and the nature of the metal.

Le passage de la bande entre les rouleaux suivant un trajet ondulé tend à écarter l'un et l'autre les deux équipages et leur imbrication doit donc être maintenue en permanence, en prenant appui sur la cage fixe.The passage of the strip between the following rollers a wavy path tends to separate both two crews and their nesting must therefore be permanently maintained, by resting on the cage fixed.

C'est pourquoi chaque équipage de planage placé, respectivement, de chaque côté du plan de passage de la bande, prend appui, généralement, sur une traverse résistante formant un sommier et s'étendant sur toute l'emprise de l'équipage de planage.This is why each leveling crew placed, respectively, on each side of the passage plane of the strip is generally supported on a cross member resistant forming a box spring and extending over all the grip of the leveling crew.

De telles dispositions sont décrites, par exemple, dans le document DE-A-1.552.086, qui correspond au préambule de la revendication 1.Such arrangements are described, by example, in document DE-A-1.552.086, which corresponds to the preamble of claim 1.

Le plus souvent, l'équipage de planage inférieur est fixe en position, ainsi que le sommier correspondant. En revanche, l'équipage supérieur doit pouvoir se déplacer verticalement pour le réglage de l'écartement entre les deux équipages. A cet effet, la traverse constituant le sommier supérieur est montée coulissante verticalement entre les montants de la cage d'appui, sa position pouvant être réglée par des actionneurs mécaniques ou hydrauliques montés aux angles de la cage et permettant de régler le niveau du sommier supérieur et de l'équipage réglable par rapport à l'équipage inférieur fixe. En cas de besoin, les actionneurs peuvent être réglés différemment, de façon à déterminer un basculement avant ou arrière ou un déhanchement de l'un des équipages par rapport à l'autre, par exemple pour diminuer l'imbrication des rouleaux dans le sens d'avancement de la bande.Most often the lower leveling crew is fixed in position, as well as the box spring corresponding. However, the upper crew must ability to move vertically to adjust the spacing between the two crews. To this end, the cross member constituting the upper box spring is mounted sliding vertically between the uprights of the support cage, its position being adjustable by mechanical or hydraulic actuators mounted at angles of the cage and allowing to adjust the level of the upper box spring and adjustable crew relative to the fixed lower crew. If needed, the actuators can be adjusted differently, from way to determine a forward or backward tilt or a swaying of one of the crews compared to the other, for example to reduce the overlapping of rollers in the direction of travel of the strip.

Les efforts développés pour le planage sont très élevés, en particulier lorsque cette opération est réalisée à froid et l'on est donc amené à donner aux planeuses une structure aussi rigide que possible de façon à pouvoir contrôler les effets du planage. Jusqu'à présent, de telles planeuses étaient donc des machines très lourdes, de conception assez simple et ne se prêtant pas à des réglages précis.The efforts developed for leveling are very particularly when this operation is performed cold and we are therefore led to give levelers a structure as rigid as possible of so that you can control the effects of leveling. Until now, such levelers were therefore very heavy machines, of fairly simple design and not suitable for precise adjustments.

Cependant, on ne peut éviter un certain cédage des différentes parties d'appui sous l'effet des efforts appliqués, qui peut entraíner une légère flexion des rouleaux actifs et, par conséquent, une répartition irrégulière des contraintes sur la largeur de la bande.However, one cannot avoid a certain yielding different support parts under the effect of applied efforts, which may cause slight bending of the active rollers and therefore uneven stress distribution across the width Of the band.

Dans une disposition particulière décrite par le document DE-A-2.747.331 chaque rouleau actif est appliqué, par l'intermédiaire de ses rouleaux de soutien, sur une traverse individuelle prenant appui directement sur les montants de la cage. Dans ce cas, la flexion de chaque traverse peut être compensée au moyen d'une cale d'épaisseur réglable intercalée entre chaque traverse et les rouleaux de soutien, et constituée de deux plats à faces inclinées formant coin, dont l'épaisseur peut être augmentée, dans la partie centrale, au moyen d'un excentrique, de façon à maintenir la rectitude du rouleau actif correspondant.In a particular provision described by the document DE-A-2.747.331 each active roller is applied, through its rollers support, on an individual crosspiece taking support directly on the amounts of the cage. In that case, the bending of each cross member can be compensated for by means of an adjustable thickness shim inserted between each cross member and the support rollers, and consisting of two dishes with inclined faces forming corner, whose thickness can be increased, in the central part, by means of an eccentric, so as to maintain the straightness of the corresponding active roller.

Une telle machine n'est, cependant, pas adaptée aux efforts de planage de plus en plus élevés qu'il est nécessaire de développer pour tenir compte de l'évolution des produits et des besoins de la clientèle. De plus, les réglages doivent être effectués à l'avance et, par conséquent à vide, les positions relatives des coins pouvant difficilement être corrigées en cours de planage.Such a machine is, however, not suitable to the higher and higher leveling efforts it is necessary to develop to account for changing products and needs of the customer base. In addition, the settings must be performed in advance and therefore empty, relative positions of the corners which are difficult be corrected during planing.

Dans une disposition plus perfectionnée décrite dans le document EP-A-0.577.170, chaque rouleau de planage prend appui, par l'intermédiaire d'un système à coins d'épaisseur réglable, sur un châssis de support qui prend appui lui-même sur les angles du sommier par des cales fixes placées dans l'axe des quatres vérins de réglage du niveau du sommier.In a more sophisticated arrangement described in document EP-A-0.577.170, each roll of leveling is supported by a system with adjustable thickness corners, on a frame of support which supports itself on the angles of the bed base by fixed wedges placed in the axis of the four leveling cylinders for the level of the bed base.

Deux rangées de vérins plats répartis entre lesdites cales fixes, sont interposées entre le sommier et le châssis de chaque équipage de planage, respectivement du côté de l'entrée et de la sortie de celui-ci, la répartition des pressions entre lesdits vérins plats étant réglée de façon à compenser la flexion du sommier sous l'effet des efforts appliqués pour maintenir la rectitude du châssis de support et, par conséquent, des rouleaux de planage qui prennent appui sur celui-ci.Two rows of flat cylinders distributed between said fixed wedges are interposed between the box spring and the chassis of each leveling crew, respectively on the entry and exit side of this one, the distribution of pressures between said flat cylinders being adjusted to compensate for the bending of the bed base under the effect of the applied forces to maintain the straightness of the support frame and, therefore leveling rollers which take support on it.

Ce réglage peut être effectué en charge et il est donc possible de maintenir la planéité de châssis et, par conséquent, le degré d'imbrication des rouleaux, en s'adaptant à des variations des efforts appliqués en cours de fonctionnement.This adjustment can be carried out under load and is therefore possible to maintain the flatness of the chassis and, therefore, the degree of nesting of the rollers, by adapting to variations in applied forces during operation.

Cependant, d'autres paramètres sont à prendre en compte si l'on souhaite contrôler avec une grande précision les effets de traction-flexion appliqués sur la bande.However, other parameters must be taken into account. account if you want to control with great precision the traction-bending effects applied to the band.

En particulier, l'inventeur a eu l'idée qu'il serait souhaitable d'avoir la possibilité non seulement de tenir compte des déformations prévisibles de la machine mais également de répartir en charge l'effet de planage pour corriger les défauts de planéité détectés sur la bande. Or, dans les machines utilisées jusqu'à présent, il est simplement prévu de compenser les cédages pour maintenir le parallélisme des rouleaux et le degré d'imbrication qui est réglé à l'avance.In particular, the inventor had the idea that would be desirable to have the possibility not only to take account of foreseeable deformations of the machine but also to distribute the load the leveling effect to correct the defects of flatness detected on the tape. Now in the machines used so far, it is simply intended to compensate for cedings to maintain parallelism rollers and the degree of nesting that is set to advance.

Pour répondre à des exigences de qualité toujours plus sévères, l'invention a donc pour objet de résoudre l'ensemble des problèmes qui viennent d'être exposés grâce à des dispositifs simples et robustes, susceptibles de résister à des efforts de planage extrêmement importants, par exemple pour le planage à froid des tôles métalliques et permettant non seulement de compenser tous les cédages, mais aussi d'agir de façon précise sur la répartition des contraintes de planage appliquées sur la bande au niveau de chacun des rouleaux actifs, cette répartition pouvant être modifiée même en cours de défilement de la bande.To always meet quality requirements more severe, the invention therefore aims to solve all the problems that have just been exposed thanks to simple and robust devices, likely to resist leveling forces extremely important, for example for leveling cold metal sheets and not allowing only to compensate for all cedings, but also to act precisely on the distribution of leveling stresses applied to the strip at level of each of the active rollers, this distribution can be changed even during tape scrolling.

Selon l'invention, ce but est atteint par une planeuse à rouleaux imbriqués pour un produit en bande se déplaçant suivant une direction longitudinale de défilement, comprenant, à l'intérieur d'une cage fixe, deux équipages de planage à rouleaux parallèles écartés, placés de part et d'autre de la bande avec un décalage des rouleaux définissant un trajet ondulé de part et d'autre d'un plan moyen de défilement de la bande, chaque équipage de planage comprenant une pluralité de rouleaux rotatifs de planage à axes parallèles, associés chacun à au moins une rangée de rouleaux de soutien répartis sur toute sa longueur, l'ensemble étant monté dans un châssis de support et appliqué, du côté opposé à la bande, sur un sommier résistant prenant appui sur la cage fixe, caractérisée par le fait que le châssis de support d'au moins l'un des équipages de planage comprend une pièce en forme de cadre à l'intérieur duquel sont disposées, l'une à côté de l'autre, une pluralité de poutres transversales en nombre égal à celui des rouleaux de planage, montées coulissantes dans ledit cadre, indépendamment l'une de l'autre, chacune suivant un plan de serrage passant par l'axe du rouleau de planage correspondant, chaque rouleau actif de planage prenant appui, sur toute sa longueur, sur ladite poutre, par l'intermédiaire de ses rouleaux de soutien et chaque poutre prenant appui individuellement sur le sommier par l'intermédiaire d'au moins deux vérins hydrauliques interposés entre le sommier et la poutre et répartis sur la longueur de celle-ci.According to the invention, this object is achieved by a leveler with nested rollers for a strip product moving next a longitudinal direction of travel, including, inside a fixed cage, two roller leveling crews separated parallels, placed on either side of the strip with offset rollers defining a wavy path on either side of a mean plane of tape running, each leveling crew comprising a plurality of rotating rollers planing with parallel axes, each associated with at least a row of support rollers distributed over the whole its length, the assembly being mounted in a chassis of support and applied, on the side opposite the strip, on a resistant box spring resting on the fixed cage, characterized by the fact that the support frame at least one of the leveling crews comprises a frame-shaped part inside which are arranged, one next to the other, a plurality of transverse beams in number equal to that of leveling rollers, slidably mounted in said frame, independently of each other, each along a clamping plane passing through the axis of the corresponding leveling roller, each active roller leveling bearing, over its entire length, on said beam, by means of its rollers support and each beam supported individually on the box spring via at least two hydraulic cylinders interposed between the bed base and the beam and distributed over the length of this one.

De préférence, chaque rouleau de planage est monté rotatif, à ses extrémités, sur deux paliers de centrage reliés respectivement aux extrémités correspondantes de la poutre associée, d'une façon permettant un déplacement relatif limité desdits paliers du rouleau par rapport à la poutre sous l'action desdits vérins hydrauliques.Preferably, each leveling roller is rotatably mounted at its ends on two bearings centering connected respectively to the ends correspondents of the associated beam, in a way allowing a limited relative displacement of said roller bearings in relation to the beam under the action of said hydraulic cylinders.

De façon particulièrement avantageuse, la planeuse comprend des moyens de réglage en position de chacun des vérins interposés entre le sommier et chaque poutre transversale pour le réglage individuel du profil du niveau d'au moins certains des rouleaux actifs de planage par rapport au plan moyen de défilement de la bande. Mais les vérins peuvent aussi être réglés simultanément, soit pour déterminer individuellement le niveau de chacun des rouleaux actifs, soit pour agir globalement sur l'imbrication des rouleaux.Particularly advantageously, the leveler includes means for adjusting the position of each of the cylinders interposed between the box spring and each cross beam for individual adjustment level profile of at least some of the rollers leveling assets relative to the mean plane of tape scrolling. But the cylinders can also be set simultaneously, either to determine individually the level of each of the rollers active, or to act globally on nesting rollers.

Selon une autre caractéristique essentielle, la machine comprend des moyens de réglage en pression de chacun des vérins interposés entre le sommier et chaque poutre transversale pour le réglage individuel de l'effort de serrage supporté par au moins certains des rouleaux de planage.According to another essential characteristic, the machine includes means for adjusting the pressure of each of the cylinders interposed between the box spring and each cross beam for individual adjustment of the clamping force supported by at least some leveling rollers.

De façon avantageuse, chaque poutre transversale présente une largeur au plus égale à la distance entre les axes des rouleaux de planage et les vérins d'appui de chaque poutre sur le sommier présentent chacun une section allongée, chaque vérin ayant un piston dont la largeur dans le sens transversal à la poutre ne dépasse pas sensiblement la largeur de celle-ci et dont la longueur est déterminée pour définir une section utile de la chambre du vérin compatible avec l'effort d'appui à exercer compte tenu du nombre de vérins agissant sur chaque poutre. Advantageously, each transverse beam has a width at most equal to the distance between the axes of the leveling rollers and the support cylinders of each beam on the bed base each have a elongated section, each cylinder having a piston whose width across the beam does not not significantly exceed the width thereof and whose length is determined to define a useful section of the cylinder chamber compatible with the support effort to exercise taking into account the number of cylinders acting on each beam.

De préférence, chaque poutre transversale prend appui sur le sommier par l'intermédiaire de trois vérins, respectivement un vérin central et deux vérins latéraux, lesdits vérins étant associés à un moyen de réglage de la position du vérin central pour le réglage d'imbrication du rouleau correspondant et des moyens de correction des positions relatives des deux autres vérins pour contrôler le profil du rouleau et sa variation sous l'effet des efforts appliqués.Preferably, each transverse beam takes support on the box spring via three cylinders, respectively a central cylinder and two cylinders lateral, said jacks being associated with a means of adjusting the position of the central cylinder for the nesting adjustment of the corresponding roller and means for correcting the relative positions of the two other cylinders to control the roll profile and its variation under the effect of the applied forces.

Selon une autre disposition avantageuse, les vérins d'appui sont ménagés dans au moins une pièce de support intermédiaire interposée entre le sommier et l'ensemble des poutres transversales, et dans laquelle sont logés les corps des vérins, ces derniers étant disposés en plusieurs rangées parallèles aux poutres transversales.According to another advantageous arrangement, the support cylinders are provided in at least one piece of intermediate support interposed between the box spring and the set of transverse beams, and in which are housed the cylinders, the latter being arranged in several rows parallel to the beams transverse.

Dans un mode de réalisation particulier, les corps des vérins placés au même niveau sur les différentes poutres transversales sont rassemblés dans une pièce unique s'étendant sur l'ensemble des poutres et dans laquelle sont ménagés des évidements constituant les chambres des vérins et dans lesquels sont montés coulissants des pistons prenant appui sur la poutre correspondante.In a particular embodiment, the cylinder bodies placed at the same level on the different cross beams are gathered in a single piece spanning all of the beams and in which recesses are provided constituting the chambers of the jacks and in which sliding pistons are supported on the corresponding beam.

Selon une autre caractéristique préférentielle, le châssis de support comprend un cadre rectangulaire entourant l'ensemble des rouleaux et associé à une pluralité de cloisons de guidage écartées l'une de l'autre de façon à limiter des espaces plats dans lesquels sont logées les poutres transversales, chacune étant munie, à ses deux extrémités, de moyens d'appui sur le cadre avec possibilité de coulissement. De plus, l'ensemble du châssis de support est fermé, du côté opposé au rouleau, par une plaque recouvrant l'ensemble des poutres transversales de façon à former un boítier, ladite plaque étant munie, au droit de chaque poutre, d'une pluralité d'orifices de passage des pistons des vérins interposés entre chaque poutre et le sommier. L'ensemble forme ainsi une cassette qui peut être retirée de la planeuse par translation suivant une direction parallèle aux axes des rouleaux.According to another preferred characteristic, the support frame includes a rectangular frame surrounding all of the rollers and associated with a plurality of guide partitions separated one of the other so as to limit flat spaces in which are housed the transverse beams, each being provided, at its two ends, with means of support on the frame with possibility of sliding. In addition, the entire support frame is closed, on the side opposite the roller, by a plate covering the set of transverse beams so as to form a housing, said plate being provided, at the right of each beam, of a plurality of passage orifices pistons of the cylinders interposed between each beam and the box spring. The whole thus forms a cassette which can be removed from the leveler by translation in a direction parallel to the axes of the rollers.

Un procédé de réglage de l'effet de planage effectué sur une bande utilisant une planeuse à rouleaux imbriqués selon l'invention est défini dans la revendication 16.A method of adjusting the leveling effect carried out on a strip using a roller leveler nested according to the invention is defined in claim 16.

Selon un tel procédé, on règle la position de l'un des sommiers par rapport à l'autre pour déterminer un niveau de référence de l'ensemble de l'équipage de planage par rapport à l'autre et, chaque rouleau de planage étant monté, avec ses rouleaux d'appui, sur une poutre transversale montée coulissable perpendiculairement au plan de passage de la bande et prenant appui sur le sommier correspondant par l'intermédiaire d'au moins deux vérins hydrauliques, on détermine avec précision les niveaux relatifs d'au moins un groupe de rouleaux de planage par rapport au niveau de référence, par réglage individuel des positions des vérins d'appui correspondant à chacun des rouleaux, de façon à définir un degré d'imbrication déterminé de chacun des rouleaux dudit groupe, les pressions appliquées sur chacun desdits vérins étant limitées à une valeur de sécurité correspondant à un effort maximal de planage encaissé par chacun des rouleaux de planage.According to such a method, the position is adjusted of one of the box springs relative to the other for determine a baseline of the set of the leveling crew relative to each other and, each leveling roller being mounted, with its rollers support, on a transverse beam mounted sliding perpendicular to the passage plane of the band and bearing on the corresponding box spring through at least two cylinders hydraulic levels are precisely determined relative of at least one group of leveling rollers relative to the reference level, by setting individual positions of the support cylinders corresponding to each of the rollers, so that define a specific degree of nesting of each of the rollers of said group, the pressures applied to each of said cylinders being limited to a value of safety corresponding to a maximum leveling effort cashed by each of the leveling rollers.

D'autre part, on a vu que, dans un mode de réalisation préférentiel, chaque poutre de support d'un rouleau de planage est associée à au moins trois vérins d'appui, respectivement un vérin central et deux vérins latéraux.On the other hand, we have seen that, in a mode of preferential realization, each support beam of a leveling roller is associated with at least three support cylinders, respectively a central cylinder and two side cylinders.

Dans ce cas, selon un procédé particulièrement avantageux, on contrôle le niveau de chaque rouleau de planage correspondant à un degré d'imbrication déterminé par réglage en position du vérin central de la poutre correspondante, en fonction des cédages prévisibles des différentes parties de la cage, compte tenu des efforts appliqués, on détermine l'écart entre les positions mesurées des deux vérins latéraux d'appui de ladite poutre et l'on corrige les dites positions pour ramener l'écart mesuré à un écart de référence correspondant au parallélisme du rouleau avec le niveau de référence.In this case, according to a particularly method advantageous, we control the level of each roll of leveling corresponding to a degree of nesting determined by adjusting the position of the central cylinder the corresponding beam, depending on the cedings predictable from different parts of the cage, account given the applied forces, the difference between the measured positions of the two side cylinders support of said beam and we correct said positions to reduce the measured difference to a difference of reference corresponding to the parallelism of the roller with the reference level.

D'autre part, en fonction de l'effort de planage correspondant à la somme des pressions mesurées respectivement sur les trois vérins, on répartit les pressions entre les derniers en tenant compte des positions relatives desdits vérins, de façon que la génératrice active du rouleau de planage considéré, au contact du produit, soit maintenue rectiligne.On the other hand, depending on the leveling effort corresponding to the sum of the pressures measured respectively on the three cylinders, the pressures between the latter taking into account relative positions of said cylinders, so that the active generator of the leveling roller in question, at contact with the product, be kept straight.

Selon une autre caractéristique particulièrement avantageuse du procédé, dans le cas où la planeuse comprend un nombre n impair de rouleaux imbriqués, respectivement (1, 3, 5....n) sur l'un des équipages et (2, 4, 6...n-1) sur l'autre équipage, on règle en position les vérins correspondant à au moins deux rouleaux, respectivement (p) et (q) de chacun des deux équipages, placés respectivement au dessus et en dessous de la bande et l'on règle en pression les vérins correspondant aux deux paires de rouleaux, respectivement (p-1, p+1) et (q-1, q+1) qui encadrent chacun desdits rouleaux (p, q) réglés en position de façon à déterminer au moins deux courbures en des sens inverses sur lesdits rouleaux (p et q), les emplacements de ces derniers dans chacun des deux équipages et leurs niveaux relatifs par rapport au niveau de référence, ainsi que les pressions appliquées sur les rouleaux qui les encadrent, étant déterminés en fonction des caractéristiques de la bande à planer de façon à réaliser l'effet de planage souhaité.According to another particularly characteristic advantageous of the process, in the case where the leveler includes an odd number n of nested rollers, respectively (1, 3, 5 .... n) on one of the crews and (2, 4, 6 ... n-1) on the other crew, we adjust position the cylinders corresponding to at least two rolls, respectively (p) and (q) of each of the two crews, placed respectively above and in below the strip and the pressure is adjusted cylinders corresponding to the two pairs of rollers, respectively (p-1, p + 1) and (q-1, q + 1) which frame each of said rollers (p, q) adjusted in position so as to determine at least two curvatures in directions reverse on said rollers (p and q), the locations of these in each of the two crews and their relative levels compared to reference level, as well as the pressures applied to the rollers that frame them, being determined based on the characteristics of the strip to be leveled so as to achieve the leveling effect wish.

D'autres caractéristiques avantageuses apparaítront dans la description suivante d'un mode de réalisation particulier, donné à titre d'exemple et représenté sur les dessins annexés.Other advantageous features will appear in the following description of a mode of particular realization, given by way of example and shown in the accompanying drawings.

La figure 1 est une vue générale d'un mode de réalisation d'une planeuse selon l'invention, en coupe partielle suivant un plan transversal à la direction de défilement.Figure 1 is a general view of an embodiment of a leveler according to the invention, in partial section along a plane transverse to the direction of travel.

La figure 2 est une vue à plus grande échelle, de la planeuse, en coupe longitudinal, suivant un plan médian parallèle à la direction de défilement.FIG. 2 is an enlarged view, of the leveler, in longitudinal section, along a plane median parallel to the direction of travel.

La figure 3 est un schéma de détail, en perspective, avec arraché partiel.Figure 3 is a detailed diagram, in perspective, with partial snatch.

La figure 4 est un schéma d'ensemble des circuits de commande des vérins.Figure 4 is an overall circuit diagram actuator control.

La figure 5 montre schématiquement un arrangement particulier des rouleaux de planage.Figure 5 shows schematically an arrangement especially leveling rollers.

Sur les figures 1 et 2, on a représenté l'ensemble d'une planeuse comportant une cage fixe 1 constituée de deux montants écartés 11, 11' reliés par des entretoises 12 et fixés à leur base 13 sur un massif de fondation 14.In Figures 1 and 2, there is shown the whole of a leveler comprising a fixed cage 1 consisting of two spaced apart uprights 11, 11 'connected by spacers 12 and fixed to their base 13 on a foundation block 14.

Entre les deux montants 11, 11', s'étendent deux traverses, respectivement supérieure 3 et inférieure 3', dont les extrémités sont enfilées dans des fenêtres 10 ménagées respectivement dans les deux montants 11, 11'. Between the two uprights 11, 11 ', extend two sleepers, respectively upper 3 and lower 3 ', the ends of which are threaded in windows 10 provided respectively in the two uprights 11, 11 '.

La traverse inférieure 3' est fixe et prend appui directement sur la base 13 de la cage 1.The lower cross-member 3 'is fixed and rests directly on the base 13 of the cage 1.

En revanche, la traverse supérieure 3 est réglable en hauteur et peut coulisser verticalement sous l'action de quatre vérins hydrauliques ou mécaniques 15 ménagés à la partie supérieure des montants 11, 11'.On the other hand, the upper crosspiece 3 is adjustable in height and can slide vertically under the action of four hydraulic cylinders or mechanical 15 provided at the upper part of the uprights 11, 11 '.

Chacune des traverses 3, 3' est réalisée de façon particulièrement rigide et forme un sommier résistant définissant une face d'appui sensiblement plane 32, 32'.Each of the crosspieces 3, 3 'is made so particularly rigid and forms a resistant box spring defining a substantially planar bearing face 32, 32 '.

Entre les deux sommiers 3, 3', sont disposés deux équipages de planage, respectivement supérieur 2 et inférieur 2', placés de part et d'autre d'un plan P de passage de la bande à planer A et prenant appui du côté opposé, sur les faces d'appui 32, 32' respectivement du sommier supérieur 3 et du sommier inférieur 3'.Between the two box springs 3, 3 ', are arranged two planing crews, respectively upper 2 and lower 2 ', placed on either side of a plane P of passage of the strip to be leveled A and bearing on the opposite side, on the bearing faces 32, 32 ' respectively of the upper box spring 3 and the box spring lower 3 '.

Toutes ces dispositions sont connues et ne nécessitent pas une description détaillée.All these provisions are known and do not not require a detailed description.

Chaque équipage de planage 2, 2' comprend une pluralité de rouleaux actifs 21 écartés les uns des autres et dont les axes sont perpendiculaires à la direction x'-x de défilement du produit à planer. Chaque rouleau actif 21 est monté rotatif, à ses deux extrémités, sur deux paliers 23 définissant un axe de rotation 20 du rouleau et prend appui sur des rouleaux ou galets de soutien 22, l'ensemble étant monté dans un châssis de support qui est appliqué contre le sommier 3.Each leveling crew 2, 2 ′ comprises a plurality of active rollers 21 spaced from each other others and whose axes are perpendicular to the direction x'-x of movement of the product to be leveled. Each active roller 21 is rotatably mounted at its two ends, on two bearings 23 defining an axis of rotation 20 of the roller and rests on rollers or support rollers 22, the assembly being mounted in a support frame which is applied against the box spring 3.

Dans le mode de réalisation représenté sur les figures, l'équipage supérieur 2 comprend quatre rouleaux actifs 21 associés chacun à deux rangées de galets de soutien 22 centrés respectivement sur deux axes écartés symétriquement de part et d'autre d'un plan vertical de symétrie P1 passant par l'axe du rouleau actif correspondant 21.In the embodiment shown in the figures, the upper crew 2 includes four active rollers 21 each associated with two rows of support rollers 22 centered respectively on two axes symmetrically spaced on either side of a vertical plane of symmetry P1 passing through the axis of the corresponding active roller 21.

L'équipage inférieur 2' comprend cinq rouleaux actifs 21' associés chacun à deux rangées de galets de soutien 22' et dont les axes sont placés dans des plans verticaux de symétrie P'1 qui sont décalés d'un demi-pas par rapport aux plans de symétrie P1 des rouleaux supérieurs 21, de telle sorte que, de façon connue, une bande métallique passant suivant la direction longitudinale x'-x suit un trajet ondulé, de part et d'autre d'un plan moyen de défilement P entre les deux rangées de rouleaux 21, 21', l'amplitude des ondulations dépendant du degré d'imbrication des rouleaux 21, 21'.The lower 2 'unit includes five rollers active 21 'each associated with two rows of rollers support 22 'and whose axes are placed in vertical planes of symmetry P'1 which are offset by one half step with respect to the P1 planes of symmetry upper rollers 21, so that, so known, a metal strip passing along the longitudinal direction x'-x follows a wavy path, from on either side of a mean plane of travel P between the two rows of rollers 21, 21 ', the amplitude of the undulations depending on the degree of nesting of rollers 21, 21 '.

Comme le montrent les figures 1 à 3, le châssis de support 4 de chaque équipage de planage est constitué par une pièce creuse 40 en forme de cadre dans laquelle sont logées plusieurs poutres transversales 5 disposées l'une à côté de l'autre à l'intérieur du cadre 40 et supportant chacune l'un des rouleaux actifs 21 et ses galets de soutien 22. La pièce creuse 40 forme donc un cadre de section rectangulaire entourant l'ensemble des poutres transversales 5 qui peuvent coulisser individuellement à l'intérieur du cadre 40, avec les rouleaux et les galets.As the figures show 1 to 3, the support chassis 4 of each crew of leveling is constituted by a hollow piece 40 in the form frame in which several beams are housed transverse 5 arranged one beside the other at inside the frame 40 and each supporting one of the active rollers 21 and its support rollers 22. The hollow part 40 therefore forms a section frame rectangular surrounding all the beams transverse 5 which can slide individually inside the frame 40, with the rollers and the pebbles.

Le châssis 4 constitue un caisson de forme rectangulaire limité par deux grands côtés 42 parallèles aux plans de symétrie P1 et deux petits côtés 43 perpendiculaires auxdits plans, et entre lesquels s'étendent des cloisons intermédiaires 41 qui limitent, à l'intérieur du cadre 40, plusieurs logements allongés 45 dans lesquels sont enfilées, respectivement, les poutres transversales 5. Chaque poutre 5 est centrée sur un plan vertical de symétrie P1 passant par l'axe du rouleau actif correspondant 21 et est munie, à ses deux extrémités, de parties en saillie 53, 53' dans lesquelles sont logés, respectivement, les deux paliers 23, 23' du rouleau actif 21.The chassis 4 constitutes a form box rectangular bounded by two long sides 42 parallel to the planes of symmetry P1 and two small sides 43 perpendicular to said planes, and between which extend from the intermediate partitions 41 which limit, inside the frame 40, several elongated housings 45 in which are threaded, respectively, the transverse beams 5. Each beam 5 is centered on a vertical plane of symmetry P1 passing through the axis of the corresponding active roller 21 and is provided at its two ends with projection 53, 53 'in which are housed, respectively, the two bearings 23, 23 'of the roller active 21.

Par ailleurs, chaque poutre 5 est soutenue, à chacune de ses deux extrémités, par des vérins 52, prenant appui sur des parties d'appui correspondantes de chaque côté latéral 43 du cadre 4.Furthermore, each beam 5 is supported, at each of its two ends, by jacks 52, bearing on corresponding bearing parts on each lateral side 43 of the frame 4.

Comme on l'a représenté schématiquement sur la figure 3, chaque rouleau actif 21 prend appui sur deux rangées de galets de soutien 22a, 22b qui sont montés rotatifs sur des supports intermédiaires 54 fixés sur la partie inférieure de la poutre 5, autour d'axes alternativement écartés de part et d'autre du plan vertical de symétrie P1 de la poutre.As shown schematically on the Figure 3, each active roller 21 is supported on two rows of support rollers 22a, 22b which are mounted rotating on intermediate supports 54 fixed on the lower part of the beam 5, around axes alternately discarded on either side of the plane vertical symmetry P1 of the beam.

Il est à noter que le montage des paliers 23 des rouleaux actifs 21 aux deux extrémités de la poutre correspondante 5 est prévu pour assurer simplement le support du rouleau 21 mais avec une possibilité de léger déplacement par rapport à la poutre, le rouleau 21 s'appuyant sur celle-ci uniquement par ses galets de soutien 22.It should be noted that the mounting of the bearings 23 of the active rollers 21 at both ends of the beam corresponding 5 is provided to simply ensure the support of the roller 21 but with a possibility of slight displacement relative to the beam, the roller 21 leaning on it only by its rollers support 22.

D'une façon générale, chaque poutre 5 présente une section droite rectangulaire dont la largeur est du même ordre que le diamètre du rouleau 21 correspondant et au plus égale à l'entr'axe des rouleaux et dont la hauteur est au moins égale à la largeur et, de préférence, nettement supérieure à celle-ci.In general, each beam 5 has a rectangular cross section whose width is of the same order as the diameter of the roller 21 corresponding to and at most equal to the center distance of rollers and whose height is at least equal to the width and preferably much greater than this one.

De la sorte, chaque poutre 5 forme, avec le rouleau actif correspondant 21 et ses galets de soutien 22a, 22b, un ensemble relativement rigide, suspendu au cadre 4 par les vérins 52, 52' et qui peut coulisser verticalement à l'intérieur de son logement 45, le long du plan de symétrie P1 qui constitue donc un plan de serrage du rouleau actif 21.In this way, each beam 5 forms, with the corresponding active roller 21 and its rollers support 22a, 22b, a relatively rigid assembly, suspended from frame 4 by jacks 52, 52 'and which can slide vertically inside its housing 45, along the plane of symmetry P1 which therefore constitutes a clamping plane of the active roller 21.

D'autre part, les galets de soutien 22a, 22b de chaque rouleau 21 sont décalés alternativement de part et d'autres du plan de symétrie P1 de façon à pouvoir s'intercaler entre les galets des rouleaux voisins. Ainsi, chaque poutre 5 avec son rouleau actif et ses galets de soutien peut coulisser individuellement dans son logement sans interférence avec le mouvement de coulissement des poutres voisines.On the other hand, the support rollers 22a, 22b of each roller 21 are shifted alternately by share and others of the plane of symmetry P1 so that we can be inserted between the rollers of the neighboring rollers. Thus, each beam 5 with its active roller and its support rollers can slide individually in its housing without interference with the movement of sliding neighboring beams.

A cet effet, chaque poutre de support 5 prend appui sur le sommier 3 indépendamment des poutres voisines par l'intermédiaire d'une rangée de plusieurs vérins 6 qui sont interposés entre chaque poutre 5 et la face d'application 32 du sommier 3 et répartis sur toute la longueur de la poutre 5.For this purpose, each support beam 5 takes support on the bed base 3 independently of the beams neighbors through a row of several cylinders 6 which are interposed between each beam 5 and the application face 32 of the bed base 3 and distributed over the entire length of the beam 5.

Les vérins 6 sont logés dans une pièce 33 en construction mécano-soudée, qui recouvre toute la face d'application 32 du sommier 3 et dans laquelle les vérins 6 sont disposés en plusieurs rangées correspondant respectivement à chacune des poutres transversales 5, chaque vérin 6 comprenant un piston 62 et un corps 61 logé dans la pièce intermédiaire 33.The jacks 6 are housed in a room 33 in mechanically welded construction, which covers the entire face application 32 of the bed base 3 and in which the cylinders 6 are arranged in several rows corresponding respectively to each of the beams transverse 5, each cylinder 6 comprising a piston 62 and a body 61 housed in the intermediate part 33.

Il faut noter que, pour agir individuellement sur chaque poutre 5, les pistons des vérins correspondant doivent avoir une largeur ne dépassant pas celle de la poutre. Des vérins à section circulaire ne pourraient donc développer que des efforts assez réduits et il faudrait alors utiliser un assez grand nombre de vérins répartis sur toute la longueur de la poutre pour exercer sur le rouleau actif correspondant un effort d'application suffisant.It should be noted that, to act individually on each beam 5, the pistons of the corresponding cylinders must have a width not exceeding that of the beam. Cylinders with circular cross-section could not so develop that quite reduced efforts and it would then have to use a fairly large number of cylinders distributed over the entire length of the beam to exercise on the corresponding active roller a sufficient application effort.

Une telle disposition compliquerait les circuits hydrauliques et la régulation de l'ensemble.Such an arrangement would complicate circuits hydraulic and regulation of the assembly.

C'est pourquoi, selon une autre caractéristique particulièrement avantageuse de l'invention, on utilise, de préférence, des vérins ayant une section allongée, le piston 62 de chaque vérin 6 ayant une largeur légèrement inférieure à celle de la poutre 5, mais couvrant, dans le sens longitudinal de la poutre 5, une longueur beaucoup plus importante.This is why, according to another characteristic particularly advantageous of the invention, it preferably uses cylinders with a cross-section elongated, the piston 62 of each cylinder 6 having a width slightly less than that of beam 5, but covering, in the longitudinal direction of the beam 5, a much greater length.

Pour assurer dans de bonnes conditions l'étanchéité de chaque vérin, le piston et la chambre correspondante 64 ont une section allongée ayant, de préférence, des extrémités arrondies circulaires de façon à présenter une forme oblongue, comme on l'a représenté schématiquement sur la figure 3.To ensure in good conditions the tightness of each cylinder, the piston and the chamber corresponding 64 have an elongated section having, from preferably circular rounded ends of so as to have an oblong shape, as we have shown schematically in Figure 3.

On peut ainsi augmenter considérablement la section utile de chaque vérin et obtenir un effort suffisant en utilisant seulement un nombre réduit de vérins par poutre, la longueur de chaque vérin étant déterminée pour définir une section utile de la chambre du vérin compatible avec l'effort d'appui à exercer compte tenu du nombre de vérins agissant sur chaque poutre.We can thus considerably increase the useful section of each cylinder and obtain a force sufficient using only a reduced number of cylinders per beam, the length of each cylinder being determined to define a useful section of the cylinder chamber compatible with the bearing force at exercise given the number of cylinders acting on each beam.

De façon préférentielle, par exemple, chaque poutre 5 peut être associée à trois vérins seulement, respectivement un vérin central 6a centré dans le plan médian de la planeuse et deux vérins latéraux 6b et 6c.Preferably, for example, each beam 5 can be associated with only three cylinders, respectively a central cylinder 6a centered in the plane median of the leveler and two lateral cylinders 6b and 6c.

Par ailleurs, en réduisant ainsi le nombre des vérins, il est possible de simplifier la réalisation de la pièce intermédiaire 33. Furthermore, thereby reducing the number of cylinders, it is possible to simplify the realization of the intermediate piece 33.

En effet, comme on l'a représenté sur les figures, les corps 61 de tous les vérins placés respectivement au même niveau sur chacune des poutres parallèles 5 peuvent être regroupés dans une pièce unique 61', qui s'étend sur toute la largeur du sommier 3 dans un même évidement en forme de rainure 34. Dans cette pièce 61' sont ménagés plusieurs alésages centrés respectivement dans les plans médians P1 des différentes poutres 5 et constituant chacun la chambre 64 d'un vérin dont le piston 62 prend appui sur la face supérieure 55 de la poutre 5 correspondante. Bien entendu, des circuits d'alimentation et d'évacuation d'huile, non représentés sur les figures, sont ménagés dans la pièce 61'.Indeed, as shown in the figures, the bodies 61 of all the jacks placed respectively on the same level on each of the beams parallels 5 can be grouped in one room single 61 ', which spans the entire width of the box spring 3 in the same groove-shaped recess 34. In this room 61 'are arranged several bores centered respectively in the median planes P1 of the different beams 5 and each constituting the chamber 64 of a jack whose piston 62 is supported on the upper face 55 of the beam 5 corresponding. Of course, circuits oil supply and outlet, no shown in the figures, are arranged in the room 61 '.

De plus, chaque vérin 6 est associé à un capteur de position 63 logé dans la pièce 61'.In addition, each cylinder 6 is associated with a sensor. position 63 housed in room 61 '.

De telles dispositions permettent donc de régler avec une grande précision, non seulement la position du piston de chaque vérin mais aussi la pression supportée ou appliquée sur la poutre au niveau correspondant.Such provisions therefore make it possible to regulate with great precision, not only the position piston of each cylinder but also the pressure supported or applied to the beam at level corresponding.

Comme on le verra en détail plus loin, en assurant ainsi un appui individuel de chaque rouleau de planage sur le sommier par l'intermédiaire d'une poutre et d'une série de vérins hydrauliques, il devient possible de contrôler d'une part le degré d'imbrication et la répartition des efforts de traction-flexion appliqués par chacun des rouleaux actifs et d'autre part, la répartition des contraintes de planage sur la longueur de chaque rouleau.As will be seen in detail below, in thus ensuring individual support for each roller leveling on the bed base via a beam and a series of hydraulic cylinders it becomes possible to control on the one hand the degree of nesting and the distribution of the efforts of traction-bending applied by each of the rollers assets and on the other hand, the stress distribution leveling along the length of each roll.

Il faut noter que les poutres 5 de soutien des rouleaux actifs 21, peuvent avoir une hauteur nettement supérieure à leur largeur, ce qui leur donne une rigidité relativement élevée et permet de répartir sur toute la longueur du rouleau actif, les effets des vérins de réglage, sans gêner le coulissement de l'ensemble. Chaque poutre 5 est en effet, parfaitement maintenue latéralement dans le logement 45 correspondant du cadre 4 et résiste élastiquement et sans risque de flambement aux actions exercées par les vérins 6, dont les effets sur les rouleaux actifs 21 peuvent donc être extrêmement précis.It should be noted that the support beams 5 of the active rollers 21, may have a height significantly greater than their width, which gives them relatively high rigidity and allows distribution over the entire length of the active roller, the effects of adjustment cylinders, without hindering the sliding of all. Each beam 5 is indeed, perfectly laterally held in the housing 45 corresponding to frame 4 and resists elastically and without risk of buckling to the actions exerted by the cylinders 6, the effects of which on active rollers 21 can therefore be extremely precise.

L'équipage de planage inférieur 2' prenant appui sur le sommier inférieur 3' est réalisé d'une façon tout-à-fait analogue, mais est, normalement, fixe en hauteur alors que le niveau général du sommier supérieur 3 avec l'équipage de planage supérieur 2 peut être réglé en hauteur, au moyen des vérins 15.The lower leveling crew 2 'taking support on the lower base 3 'is made in a way completely analogous, but is normally fixed in height while the general level of the box spring upper 3 with upper leveling crew 2 can be adjusted in height, by means of jacks 15.

De préférence, le cadre 4 est fermé, à sa partie supérieure, par une plaque 43 qui recouvre l'ensemble des poutres 5 et dans laquelle sont ménagées, au droit de chaque poutre 5, des rangées d'orifices 44 de passage des pistons 62.Preferably, the frame 4 is closed, at its part upper, by a plate 43 which covers the assembly beams 5 and in which are provided, at right of each beam 5, rows of orifices 44 of passage of pistons 62.

De la sorte, le cadre 4 forme un boítier contenant l'ensemble des poutres 5 avec les rouleaux 21 et leurs galets de soutien 22 qui peut avantageusement constituer une cassette démontable. Celle-ci est appliquée et fixée de façon amovible contre le sommier 3 par des clames 35 actionnées par des vérins 36 prenant appui sur le sommier 3, la plaque supérieure 43 prenant appui sur la face d'application 32 du sommier 3, par l'intermédiaire des pièces 61' constituant les corps des vérins 6.In this way, the frame 4 forms a housing containing all the beams 5 with the rollers 21 and their support rollers 22 which can advantageously constitute a removable cassette. This is applied and removably attached against the box spring 3 by clamps 35 actuated by jacks 36 bearing on the base 3, the upper plate 43 bearing on the face application 32 of the bed base 3, through the parts 61 'constituting the bodies of the jacks 6.

Comme on l'a indiqué plus haut, chaque poutre 5 prend appui, à ses deux extrémités sur les côtés 43 du cadre 4 par l'intermédiaire de vérins 52, 52'. Ces derniers sont réglés de façon à supporter le poids de la poutre 5 avec les galets de soutien 22 et le rouleau actif 21 correspondant et maintiennent la poutre 5 appliquée contre les vérins 6 correspondant, sans s'opposer au coulissement de la poutre sous l'effet desdits vérins.As indicated above, each beam 5 is supported at its two ends on the sides 43 of the frame 4 by means of jacks 52, 52 '. These the latter are adjusted so as to support the weight of the beam 5 with the support rollers 22 and the active roller 21 corresponding and maintain the beam 5 applied against the corresponding cylinders 6, without opposing the sliding of the beam under the effect of said cylinders.

Chaque cassette constituée par le cadre 4, et l'ensemble des poutres 5 et des rouleaux 21 et galets 22 associés, peut être retirée de la machine par un déplacement parallèle aux axes des rouleaux et des poutres.Each cassette constituted by frame 4, and the set of beams 5 and rollers 21 and rollers 22 associates, can be removed from the machine by a displacement parallel to the axes of the rollers and beams.

A cet effet, la cassette inférieure 4' est munie de galets 45 qui peuvent rouler sur des rails 16 de hauteur réglable (figure 2). De plus, les deux équipages de planage peuvent être retirés en même temps, l'équipage supérieur 2 reposant sur l'équipage inférieur 2' par l'intermédiaire de butées non représentées.For this purpose, the lower cassette 4 'is provided rollers 45 which can roll on rails 16 of adjustable height (figure 2). In addition, the two leveling crews can be removed at the same time, the upper crew 2 resting on the crew lower 2 'by means of stops not represented.

Pour cela, on fait tout d'abord descendre la cassette supérieure 4 au moyen des vérins 36 pour la faire reposer sur la cassette inférieure 4'. On écarte alors les clames 35 et l'on remonte le sommier 3, au moyen des vérins 15, jusqu'à une position supérieure représentée en pointillés sur la figure 1, de façon à dégager la cassette 2.To do this, we first lower the upper cassette 4 by means of the jacks 36 for the rest on the lower cassette 4 '. We spread then the frames 35 and we go up the box spring 3, at by means of the jacks 15, to a higher position shown in dotted lines in FIG. 1, so that release the cassette 2.

Par des moyens non représentés, on remonte alors les rails 16 portant les deux cassettes superposées 2, 2', jusqu'au niveau de rails fixes 17 ménagés sur un plancher, à côté de la machine, dans le prolongement des rails 16.By means not shown, we then ascend the rails 16 carrying the two superimposed cassettes 2, 2 ', up to the level of fixed rails 17 formed on a floor, next to the machine, in the extension rails 16.

On peut alors faire rouler l'ensemble des deux équipages 2, 2' reposant l'un sur l'autre, dans la position A représentée sur la droite de la figure 1.We can then roll all of the two crews 2, 2 ′ resting on each other, in the position A represented on the right of figure 1.

Après vérification et entretien des différents organes et leur remplacement éventuel, on ramène les deux équipages 2, 2' à l'intérieur de la machine en exécutant les mêmes opérations dans l'ordre inverse.After verification and maintenance of the various organs and their possible replacement, we bring back the two crews 2, 2 ′ inside the machine in performing the same operations in reverse order.

Grâce aux dispositions qui viennent d'être décrites, l'invention permet de disposer de deux moyens de réglage de l'écartement des équipages de planage et de l'imbrication des rouleaux.Thanks to the provisions which have just been described, the invention provides two means of adjusting the spacing of the crews of leveling and nesting of rollers.

D'une part, les quatre vérins 15 permettent de définir un niveau de référence du sommier supérieur 3 et de l'équipage de planage supérieur 2 par rapport à un niveau de base de l'équipage de planage inférieur 2' défini par le sommier inférieur 3'.On the one hand, the four jacks 15 allow define a reference level for the upper bed base 3 and the upper leveling crew 2 with respect to a lower level of the leveling crew 2 'defined by the lower base 3'.

D'autre part, selon une caractéristique essentielle de l'invention, on dispose également d'un moyen de réglage individuel du niveau de chacun des rouleaux actifs de planage 21, 21' des deux équipages 2, 2', au moyen des vérins correspondants 6 qui peuvent être réglés en position simultanément ou individuellement de façon à ajuster les positions relatives, d'une part des rouleaux supérieurs 21 par rapport au niveau de référence déterminé par les vérins 15 et d'autre part des rouleaux inférieurs 2' par rapport au niveau de base déterminé par le sommier inférieur 3'.On the other hand, according to a characteristic essential of the invention, there is also a means of individual adjustment of the level of each of the active leveling rollers 21, 21 ′ of the two crews 2, 2 ', by means of the corresponding cylinders 6 which can be adjusted in position simultaneously or individually to adjust the positions relative, on the one hand of the upper rollers 21 by relation to the reference level determined by the cylinders 15 and on the other hand lower rollers 2 ' compared to the basic level determined by the box spring lower 3 '.

Il est ainsi possible de régler, individuellement, le degré d'imbrication de chaque de rouleau actif et de le modifier, éventuellement en charge pour ajuster, la répartition des efforts de planage entre les rouleaux, même au cours du passage de la bande.It is thus possible to adjust, individually, the degree of nesting of each of active roller and modify it, possibly in load to adjust, the distribution of the leveling between rollers, even during passage Of the band.

Par exemple, on peut, comme habituellement diminuer progressivement l'imbrication des rouleaux dans le sens de défilement ou de réaliser, selon les besoins, un léger basculement d'un équipage par rapport à l'autre, en conservant un appui fixe pour chaque équipage.For example, we can, as usual gradually decrease the nesting of the rollers in the direction of scrolling or performing, depending on the needs, a slight tilting of a crew by relation to the other, keeping a fixed support for each crew.

Mais, grâce aux multiples possibilités de réglage apportées par l'invention, il est possible de déterminer, individuellement, non seulement la position mais aussi le profil de chacun des rouleaux et, par conséquent, de contrôler les effets de planage de façon beaucoup plus souple et précise que dans les dispositions antérieures.But, thanks to the multiple adjustment possibilities brought by the invention, it is possible to determine, individually, not only the position but also the profile of each of the rollers and therefore control the leveling effects much more flexible and precise than in previous provisions.

Comme on l'a indiqué, en effet, chaque vérin 6 est associé à un capteur de position 63 et il est possible, tout d'abord, de régler de la même façon et simultanément l'ensemble des vérins correspondant à une poutre de support 5 pour contrôler le niveau du rouleau actif correspondant 21, par exemple, pour faire varier le taux d'imbrication et l'amplitude des ondulations, de l'entrée à la sortie de la planeuse.As indicated, in fact, each cylinder 6 is associated with a position sensor 63 and it is possible, first of all, to adjust in the same way and simultaneously all the cylinders corresponding to a support beam 5 to control the level of the corresponding active roller 21, for example, for vary the nesting rate and the amplitude of ripples, from the entry to the exit of the leveler.

Mais en outre, à partir du niveau d'imbrication ainsi déterminé de chacun des rouleaux actifs 21, il est possible également d'agir individuellement sur les vérins 6 correspondants, d'une part pour corriger la flexion des rouleaux résultant du cédage différentiel des différentes parties de la cage et, d'autre part, pour modifier éventuellement la répartition des contraintes dans le sens transversal à la bande, notamment pour différencier les taux de planage entre le centre et les rives de la tôles.But further, from the level of nesting thus determined from each of the active rollers 21, it it is also possible to act individually on the 6 corresponding cylinders, on the one hand to correct the bending of the rollers resulting from differential yielding of the different parts of the cage and, on the other hand, to possibly modify the distribution of stresses transverse to the strip, especially to differentiate the leveling levels between the center and the edges of the sheets.

En effet, même si l'on utilise des pièces extrêmement rigides, on ne peut éviter totalement les déformations des différentes parties de la cage sous l'effet des efforts extrêmement importants qu'elles doivent supporter et la face d'application 32 du sommier 3 qui sert de référence pour le positionnement des vérins 6 peut donc ne pas rester parfaitement plane.Indeed, even if we use parts extremely rigid, you cannot totally avoid deformations of the different parts of the cage under the effect of the extremely important efforts they must support and the application face 32 of the box spring 3 which serves as a reference for positioning cylinders 6 may therefore not remain perfectly plane.

Cependant, il est possible de déterminer par le calcul les déformations prévisibles de tous les éléments en fonction des efforts appliqués et d'établir ainsi un modèle mathématique permettant de calculer non seulement la flexion globale du sommier, mais aussi le cédage correspondant, au niveau de chaque rouleau actif de planage, à l'effort appliqué par le rouleau considéré.However, it is possible to determine by the calculates the foreseeable deformations of all elements according to the applied forces and thus to establish a mathematical model allowing to calculate not only the overall bending of the bed base, but also the corresponding ceding, at the level of each active leveling roller, with the applied force by the roller in question.

Chaque vérin 6 étant associé à un capteur de position 63, il est possible, à partir des informations données par le modèle mathématique, de régler les positions respectives des vérins de façon à corriger la flexion du rouleau 21 correspondant.Each cylinder 6 being associated with a position 63, it is possible, from the information given by the mathematical model, from adjust the respective cylinder positions so that correct the bending of the corresponding roller 21.

En particulier, dans le mode de réalisation représenté sur les figures et comprenant trois vérins 6 pour chaque poutre 5, le réglage en position des vérins latéraux 6b, 6c permet de déterminer le niveau moyen de rouleau actif 21 correspondant et le modèle mathématique détermine, en fonction des efforts appliqués et de l'ensemble des paramètres de l'installation, le cédage prévisible de la partie correspondante du sommier 3 et, par conséquent, la position du vérin central 6a permettant d'assurer la rectitude du rouleau correspondant 21.In particular, in the embodiment shown in the figures and comprising three cylinders 6 for each beam 5, the position adjustment of the side cylinders 6b, 6c used to determine the level 21 corresponding active roller means and model mathematics determines, according to the efforts applied and all the parameters of installation, foreseeable transfer of the part corresponding to the box spring 3 and, consequently, the position of the central cylinder 6a enabling the straightness of the corresponding roller 21.

Il est même possible, à partir de ce niveau, de faire varier légèrement les positions relatives des pistons pour donner un profil déterminé au rouleau et, par exemple, lui appliquer un effet de cambrage positif ou négatif permettant de corriger certains défauts de planéité. It is even possible, from this level, to vary the relative positions of the pistons to give a determined profile to the roller and, for example, apply a cambering effect to it positive or negative to correct certain flatness defects.

Sur la figure 4, on a représenté schématiquement, les circuits de commande et de contrôle d'une machine de planage permettant de tels réglages.In FIG. 4, there is shown diagrammatically, the command and control circuits of a machine leveling allowing such adjustments.

Dans le cas de la machine à neuf rouleaux représentée sur les figures 1 et 2, à titre de simple exemple, l'équipage de planage supérieur comprend quatre rouleaux 21 qui sont interposés entre les cinq rouleaux de l'équipage inférieur.In the case of the nine-roller machine shown in Figures 1 and 2, by way of simple example, the upper leveling crew understands four rollers 21 which are interposed between the five rollers of the lower crew.

Chaque rouleau de planage étant associé à trois vérins oblongs 6, la machine comprend donc au total vingt-sept vérins qui sont alimentés par un circuit hydraulique 7 comprenant, de façon classique, une pompe 70, un réservoir 71 et vingt-sept servo-valves 72 associées chacune à l'un des vérins 6.Each leveling roller being associated with three oblong cylinders 6, the machine therefore comprises in total twenty-seven cylinders that are powered by a circuit hydraulic 7 comprising, conventionally, a pump 70, a tank 71 and twenty-seven servo valves 72 each associated with one of the jacks 6.

Par ailleurs, les quatre vérins 15 d'appui du sommier supérieur 3 sont également alimentés en huile, chacun par l'intermédiaire d'une servo-valve 73.Furthermore, the four support cylinders 15 of the upper box spring 3 are also supplied with oil, each via a servo valve 73.

Pour simplifier le dessin la figure 4 représente seulement deux rouleaux de planage, respectivement supérieur 21 et inférieur 21', associés chacun à une poutre de support 5, 5' prenant appui sur le sommier correspondant 3, 3' par l'intermédiaire d'une série de trois vérins 6, 6', seules les servo-valves 72, 72' correspondant à ces six vérins étant représentées avec les circuits correspondant.To simplify the drawing, figure 4 represents only two leveling rollers, respectively upper 21 and lower 21 ', each associated with a support beam 5, 5 'resting on the bed base correspondent 3, 3 'through a series of three cylinders 6, 6 ', only the servo valves 72, 72' corresponding to these six cylinders being represented with the corresponding circuits.

De même, une seule servo-valve 73 a été représentée pour symboliser l'alimentation des quatres vérins 15 d'appui du sommier d'appui supérieur 3.Similarly, only one servo valve 73 was represented to symbolize the feeding of the four cylinders 15 for supporting the upper support base 3.

Bien entendu, les circuits hydrauliques, qui n'ont été représentés que très schématiquement, comportent tous les organes habituels pour un fonctionnement normal, et notamment des limiteurs de pression montés sur les circuits correspondant à chaque rangée de vérins. De ce fait, l'effort de planage encaissé par chacun des rouleaux, qui correspond à la somme des pressions appliquées sur les vérins correspondant peut être limité à une valeur de sécurité, ce qui permet d'éviter tous risques de détérioration de la machine dû, par exemple, à une répartition trop inégale des efforts entre les rouleaux.Of course, the hydraulic circuits, which have been represented only very schematically, have all the usual organs for a normal operation, including limiters pressure mounted on the circuits corresponding to each row of cylinders. Therefore, the effort of leveling collected by each of the rollers, which corresponds to the sum of the pressures applied to the matching cylinders can be limited to a value of security, which avoids all risks of deterioration of the machine due, for example, to too uneven distribution of efforts between rollers.

Le contrôle de la position et de la pression de chacun des vingt-sept vérins 6, 6' est assuré par un système de régulation automatique 8 relié, de façon classique, par un réseau de communication 9, à divers appareillages de commande et de contrôle tels qu'un automate séquentiel 91 de commande des opérations successives de la planeuse, un automate de contrôle des auxiliaires 92, et divers éléments d'interface 93, 94, permettant, notamment à l'opérateur de déterminer ou de modifier éventuellement les paramètres de réglage de la machine et de surveiller le fonctionnement de celle-ci et du système de régulation pour intervenir, en cas de besoin.Position control and of the pressure of each of the twenty-seven cylinders 6, 6 ' is ensured by an automatic regulation system 8 conventionally connected by a network of communication 9, to various control devices and such as a sequential controller 91 of control of successive planer operations, a auxiliary controller 92, and various interface elements 93, 94, allowing, in particular to the operator to determine or modify possibly the machine setting parameters and monitor the operation of it and the regulation system to intervene in the event of need.

De tels systèmes sont utilisés habituellement pour contrôler les installations industrielles et n'ont donc pas besoin d'être décrits en détail.Such systems are commonly used to control industrial installations and therefore do not need to be described in detail.

Chaque vérin 6 d'appui d'une poutre 5 est associé, comme on l'a vu, à un capteur de position 63 et à un capteur de pression 65 qui émettent des signaux représentatifs de la position du piston 62 et de la pression dans la chambre 64 du vérin 6. Ces signaux sont appliqués sur les entrées correspondantes du système de régulation 8. Celui-ci reçoit également des signaux correspondant, respectivement, à la position et à la pression de chaque vérin 15 d'appui du sommier qui sont fournis par des capteurs de position 18 et des capteurs de pression 18' associés à chacun des vérins 15.Each support cylinder 6 of a beam 5 is associated, as we have seen, with a position sensor 63 and to a pressure sensor 65 which emits signals representative of the position of the piston 62 and of the pressure in the chamber 64 of the jack 6. These signals are applied to the corresponding inputs of the regulation system 8. This also receives signals corresponding, respectively, to the position and pressure of each support cylinder 15 of the box spring which are supplied by sensors of position 18 and pressure sensors 18 'associated with each of the cylinders 15.

Après traitement de ces informations, le système de régulation 8 émet des ordres de corrections qui sont appliqués sur les solénoïdes de commande des servo-valves 72, 72' et 73.After processing this information, the system regulator 8 issues correction orders which are applied to the control solenoids servo valves 72, 72 'and 73.

A cet effet, le système de régulation 8 comprend un certain nombre d'unités de commande et de régulation et, en particulier, un automate de compensation de cédage 81 comprenant deux parties 81a, 81b affectées, respectivement, aux sommiers supérieur 3 et inférieur 3', un automate d'asservissement de position 82, un automate d'asservissement de profil rectiligne 83 et un automate de contrôle d'horizontalité 84, qui sont associés à chacune des poutres 5, 5'.To this end, the regulation system 8 comprises a number of control units and regulation and, in particular, an automatic transfer compensation 81 comprising two parts 81a, 81b assigned, respectively, to the upper box springs 3 and below 3 ', a servo controller of position 82, a profile servo controller straight 83 and a control machine of horizontality 84, which are associated with each of the 5, 5 'beams.

Pour simplifier le dessin, la figure 4 représente seulement les boucles de régulation des vérins d'une poutre 5 de support d'un cylindre supérieur 21 mais les mêmes circuits sont associés aux vérins correspondant à tous les autres rouleaux.To simplify the drawing, Figure 4 shows only the cylinder control loops of a beam 5 for supporting an upper cylinder 21 but the same circuits are associated with the cylinders corresponding to all the other rollers.

D'une façon générale, le système de régulation a pour but de maintenir la position centrale de chaque rouleau à sa valeur de consigne et de contrôler l'horizontalité et la rectitude de la génératrice active au contact de la bande à planer. Par le terme horizontalité, il faut entendre le niveau de base défini par le sommier inférieur fixe 3', qui peut ne pas être rigoureusement horizontal, en raison des cédages et des déformations éventuelles des différents appuis.In general, the regulatory system has to maintain the central position of each roller to its set value and control horizontality and straightness of the generator active on contact with the strip to be leveled. By the term horizontality, you have to hear the basic level defined by the fixed bottom base 3 ', which may not not be strictly horizontal, due to cedings and possible deformations of the different supports.

Le niveau de base correspond donc, à vide, au plan de défilement P défini par les rouleaux 21' de l'équipage de planage inférieur 2'. La position du sommier 3 réglée au moyen des vérins 15 permet de définir un niveau de référence de l'équipage supérieur 2 rigoureusement parallèle au niveau de base de l'équipage inférieur 2' et par rapport auquel seront effectués les réglages d'imbrication des rouleaux supérieurs, l'objectif étant de réaliser une tôle à section parfaitement rectangulaire en maintenant la rectitude et le parallélisme des génératrices actives des rouleaux des deux équipages, respectivement supérieurs et inférieurs.The basic level therefore corresponds, empty, to the travel plane P defined by the rollers 21 'of the lower leveling crew 2 '. The position of bed base 3 adjusted by means of the jacks 15 makes it possible to define a higher crew reference level 2 strictly parallel to the basic level of the lower crew 2 'and in relation to which will be made the nesting adjustments of the rollers the objective being to make a sheet metal perfectly rectangular section maintaining the straightness and parallelism of active generators rolls of the two crews, respectively upper and lower.

Les capteurs 63 de chacun des vérins 6 permettent de connaítre, à chaque instant, la position du piston 62 par rapport au corps 61 du vérin mais, en raison des déformations élastiques des éléments mécaniques sous l'action des différentes forces, les valeurs mesurées ne représentent pas directement la position des génératrices actives du rouleau de planage correspondant 21 et doivent donc être corrigées par l'automate de compensation de cédage 81, en tenant compte de la largeur L du produit dans la matrice d'élasticité 810. L'automate de compensation 81 multiplie le vecteur de mesure de l'effort de planage F, correspondant à la somme des pressions des trois vérins mesurées par les capteurs 64, par la matrice d'élasticité 810 de l'ensemble mécanique pour obtenir la correction à apporter à la position souhaitée X0, correspondant à l'effort de planage au niveau du rouleau considéré, qui est déterminé par le modèle mathématique du système de régulation 8. L'automate 81a forme ainsi un signal correspondant à la position effective X de la génératrice active du rouleau considéré, qui est affiché sur le régulateur 82. Ce dernier détermine l'écart entre la position effective X à assurer et la position mesurée par le capteur correspondant 63 et émet un signal de correction de la consigne de position du vérin central 6a qui est affiché sur la servo-valve correspondante 72a de façon à obtenir la position correcte X du rouleau 21 au centre de celui-ci.The sensors 63 of each of the cylinders 6 make it possible to know, at all times, the position of the piston 62 relative to the body 61 of the cylinder but, due to the elastic deformations of the mechanical elements under the action of the different forces, the measured values do not do not directly represent the position of the active generators of the corresponding leveling roller 21 and must therefore be corrected by the yielding compensation machine 81, taking account of the width L of the product in the elasticity matrix 810. The machine compensation 81 multiplies the leveling force measurement vector F, corresponding to the sum of the pressures of the three jacks measured by the sensors 64, by the elasticity matrix 810 of the mechanical assembly to obtain the correction to be made to the desired position X 0 , corresponding to the leveling force at the level of the roller considered, which is determined by the mathematical model of the regulation system 8. The controller 81a thus forms a signal corresponding to the effective position X of the active generator of the roller in question, which is displayed on the regulator 82. The latter determines the difference between the effective position X to be ensured and the position measured by the corresponding sensor 63 and emits a signal for correcting the position setpoint of the central cylinder 6a which is displayed on the corresponding servo-valve 72a so as to obtain the correct position X of the roller 21 at the center of the latter.

L'automate de contrôle d'horizontalité 84 comprend un comparateur 86 qui reçoit, sur ses deux entrées 84b, 84c les signaux émis par les capteurs de position 63b, 63c, correspondant aux positions des deux vérins 6b, 6c par rapport au niveau de référence défini par le sommier supérieur 3.The horizontality control machine 84 includes a comparator 86 which receives, on its two inputs 84b, 84c the signals emitted by the sensors of position 63b, 63c, corresponding to the positions of the two cylinders 6b, 6c relative to the reference level defined by the upper base 3.

L'écart entre ces deux signaux, mis en forme par un régulateur P.I.D. 86', est envoyé en plus ou en moins sur les commandes des servo-valves 72b, 72c associées respectivement aux deux vérins latéraux 6b, 6c de façon à réduire en permanence cet écart à zéro.The gap between these two signals, shaped by a P.I.D. 86 ', is sent in addition or in less on orders for servo valves 72b, 72c associated respectively with the two lateral jacks 6b, 6c so as to permanently reduce this difference to zero.

Les signaux représentatifs des pressions dans les trois vérins 6a, 6b, 6c mesurées par les capteurs correspondants 65 sont affichés à l'entrée de l'automate d'asservissement de profil rectiligne 83 qui comprend un régulateur 87 de type P.I.D. associé à des comparateurs 88 permettant d'assurer la répartition entre les pressions des trois vérins de telle manière que dans l'hypothèse où la force de réaction du métal est uniforme sur la largeur, la génératrice active du rouleau 21 soit rectiligne.Signals representative of pressures in the three cylinders 6a, 6b, 6c measured by the sensors 65 correspondents are displayed at the entry of the rectilinear profile servo controller 83 which includes a regulator 87 of type P.I.D. associated to 88 comparators to ensure the distribution between the pressures of the three cylinders such that in the event that the force of metal reaction is uniform across the width, the active generator of the roller 21 is rectilinear.

Le rapport entre la force au centre et les forces latérales est une fonction de la largeur L de la tôle planée. L'écart entre la somme des forces latérales et la consigne correspondante est mis en forme par le régulateur P.I.D. 87 qui émet un signal de correction agissant simultanément sur les servo-valves latérales 72b, 72c et, en sens opposé sur la servo-valve centrale 72a, de manière à annuler cet écart. The relationship between the force at the center and the forces side is a function of the width L of the sheet glided. The difference between the sum of the lateral forces and the corresponding setpoint is formatted by the P.I.D. 87 which emits a correction signal acting simultaneously on the lateral servo valves 72b, 72c and, in the opposite direction on the servo valve central 72a, so as to cancel this difference.

On voit que le système de régulation qui vient d'être décrit permet, par ses multiples possibilités de réglage, de contrôler simultanément ou séparément le niveau absolu, la rectitude et le parallélisme de chaque génératrice active 21 par rapport à un niveau de référence défini par le sommier et, par conséquent le degré d'imbrication et la répartition des efforts de planage entre les rouleaux qui définissent un entrefer de passage parfaitement rectangulaire.We see that the regulatory system that comes to be described allows, by its multiple possibilities adjustment, control simultaneously or separately the absolute level, straightness and parallelism of each generator active 21 with respect to a level of reference defined by the bed base and, consequently the degree of nesting and the distribution of efforts leveling between the rollers which define a perfectly rectangular passage air gap.

En outre, en agissant sur la répartition des pressions entre le vérin central et les vérins latéraux, il est possible de modifier la répartition des contraintes sur la longeur de chaque rouleau, par exemple, pour tenir compte de défauts localisés sur la largeur de la bande.In addition, by acting on the distribution of pressures between the central cylinder and the cylinders side, it is possible to modify the distribution constraints on the length of each roll, for example, to take into account localized faults on the band width.

Par ailleurs, le contrôle en position et en pression des vérins d'appui de chacun des rouleaux permet de déterminer un profil ondulé optimal en effectuant les courbures nécessaires à une bonne opération de planage.In addition, the control in position and in pressure of the support cylinders of each of the rollers allows to determine an optimal wavy profile by making the bends necessary for good leveling operation.

On sait, en effet, que, dans une planeuse à multirouleaux, on effectue un certain nombre de flexions alternées dans le but de supprimer les différences de longueur de fibres, chaque flexion étant déterminée par un groupe de trois rouleaux dont le degré d'imbrication est défini en tenant compte des caractéristiques de la tôle et de l'effet de planage recherché au niveau du rouleau considéré.We know, in fact, that in a leveler multi-rolls, we perform a number of alternate flexions in order to remove the differences in fiber length, each bending being determined by a group of three rollers of which the degree of nesting is defined taking into account characteristics of the sheet and leveling effect sought at the level of the roller considered.

Ainsi, dans le cas, représenté sur la figure 2, d'une planeuse à neuf rouleaux, les vérins correspondant à tous les rouleaux peuvent être réglés en position de façon à définir, sur les rouleaux successifs, des courbures décroissantes de l'entrée à la sortie de la planeuse, les pressions dans les vérins étant réglées de façon à limiter l'effort supporté par chacun des rouleaux.So, in the case shown in Figure 2, a nine-roller leveler, the cylinders corresponding to all rollers can be adjusted in position so as to define, on the rollers successive, decreasing curvatures from entry to the exit of the leveler, the pressures in the cylinders being adjusted so as to limit the effort supported by each of the rollers.

Mais les dispositions selon l'invention permettent, comme on l'a vu, de régler individuellement la position et la pression de chacun des rouleaux qui peuvent définir un profil d'ondulations quelconque déterminé par le modèle mathématique en fonction des caractéristiques de la tôle.But the arrangements according to the invention allow, as we have seen, to regulate individually the position and pressure of each rollers that can define a profile of any undulations determined by the model mathematical depending on the characteristics of the sheet metal.

De plus, toutes les combinaisons sont possibles, certains rouleaux ayant, par exemple, une position fixe déterminée par réglage en position de leurs vérins alors que les autres rouleaux peuvent s'adapter aux ondulations définies par les rouleaux fixes en exerçant sur la tôle un effort déterminé par simple réglage en pression des vérins correspondants.In addition, all combinations are possible, certain rollers having, for example, a position fixed determined by adjustment in position of their cylinders while other rollers can adapt to the undulations defined by the fixed rollers in exerting on the sheet an effort determined by simple pressure adjustment of the corresponding cylinders.

A titre d'exemple, la figure 5 montre schématiquement une planeuse à neuf rouleaux dans laquelle seuls les vérins correspondant aux rouleaux R1, R2, R5, R8 et R9 sont réglés en position, les vérins des autres rouleaux R3, R4, R6, R7 étant simplement réglés en pression de façon à appliquer sur la tôle un effort déterminé mais sans fixer la position du rouleau correspondant.As an example, Figure 5 shows schematically a nine roller leveler in which only the cylinders corresponding to the rollers R1, R2, R5, R8 and R9 are set in position, the cylinders of the other rollers R3, R4, R6, R7 being simply adjusted in pressure so as to apply to sheet metal a determined effort but without fixing the position of the corresponding roller.

De la sorte, chacun des rouleaux R2, R5, R8 de position fixe est encadré par deux rouleaux placés de l'autre côté de la bande et réglés seulement en pression de façon à exercer sur la bande, de part et d'autre du rouleau fixe, des efforts qui déterminent une certaine courbure dépendant des caractéristiques de la bande et des pressions appliquées.In this way, each of the rollers R2, R5, R8 of fixed position is framed by two rollers placed the other side of the band and set only in pressure in order to exert on the band, on the part and on the other side of the fixed roller, forces which determine a certain curvature depending on the characteristics tape and applied pressures.

Chaque groupe de trois rouleaux détermine une courbure, dans un sens ou dans l'autre, sur le rouleau fixe correspondant et il en résulte une ondulation à trois courbures alternées dont le profil dépend de la raideur de la bande, des positions des rouleaux fixes R2, R5, R8 et des pressions appliquées par les autres rouleaux.Each group of three rollers determines a curvature, one way or the other, on the roller fixed corresponding and this results in a ripple at three alternating curvatures whose profile depends on the web stiffness, fixed roller positions R2, R5, R8 and pressures applied by others rollers.

Dans ce cas, le passage d'une courbure à la suivante dépend des caractéristiques de la bande et il est à noter que les courbures ne sont pas nécessairement centrées sur les rouleaux fixes.In this case, the transition from a curvature to the next depends on the characteristics of the tape and it note that the curvatures are not necessarily centered on the fixed rollers.

Mais il était possible également de régler en position tous les rouleaux de façon à définir, par exemple, le profil ondulé représenté sur la figure 5.But it was also possible to adjust in position all the rollers so as to define, by example, the wavy profile shown in Figure 5.

En effet, le modèle mathématique peut, en fonction des différents paramètres et en particulier de la nature du métal et des dimensions de la bande, définir un profil d'ondulations optimal qui n'est pas nécessairement lié au nombre des rouleaux et à leurs écartements, le système de régulation déterminant les positions et les pressions à affecter aux différents rouleaux en fonction du rang de chacun d'eux pour obtenir le profil souhaité.Indeed, the mathematical model can, in function of the different parameters and in particular the nature of the metal and the dimensions of the strip, define an optimal wave profile which is not necessarily related to the number of rollers and their the regulatory system determining the positions and pressures to be assigned to the different rolls according to the rank of each of them for get the desired profile.

Un avantage essentiel de l'invention réside donc dans le fait que le profil des ondulations peut être modifié librement en ajustant simplement les niveaux et les pressions appliquées sur tous les rouleaux.An essential advantage of the invention therefore lies in the fact that the profile of the undulations can be freely modified by simply adjusting the levels and the pressures applied to all the rollers.

Il est donc possible de faire varier le nombre de courbures alternées et leur amplitude et, par conséquent, l'effet de planage, en fonction des caractéristiques de la tôle, sans modifier l'écartement des rouleaux qui restent tous au contact de la tôle et peuvent donc être entrainés en rotation pour servir à la progression de la tôle, les couples d'entrainement nécessaire étant répartis sur tous les rouleaux. It is therefore possible to vary the number of alternating curvatures and their amplitude and, by Therefore, the leveling effect, depending on the sheet characteristics, without changing the spacing of the rollers which all remain in contact sheet metal and can therefore be rotated to serve the advancement of the sheet, the couples required training being spread over all rollers.

Bien entendu, l'invention ne se limite pas aux détails du mode de réalisation qui vient d'être décrit à titre d'exemple, des dispositions analogues pouvant être employées pour assurer les mêmes fonctions et obtenir les mêmes résultats sans s'écarter du cadre de protection défini par les revendications.Of course, the invention is not limited to details of the embodiment which has just been described by way of example, similar provisions which may be employed to perform the same functions and achieve the same results without departing from the framework of protection defined by the claims.

En particulier, chaque poutre pourrait être associée à seulement deux vérins permettant de régler le niveau et une inclinaison éventuelle du rouleau actif correspondant. Inversement, on pourrait utiliser un plus grand nombre de vérins, en particulier si l'on donne à ceux-ci une section circulaire.In particular, each beam could be associated with only two cylinders allowing to adjust the level and possible inclination of the roller corresponding asset. Conversely, we could use more cylinders, especially if gives them a circular section.

Toutefois, l'utilisation de vérins à section allongée, en particulier oblongue, présente l'avantage essentiel d'obtenir la surface active la plus grande et, par conséquent, l'effort maximum pour un nombre minimum de vérins répartis sur toute la surface de la poutre tournée vers le sommier.However, the use of section cylinders elongated, especially oblong, has the advantage essential to obtain the largest active surface and therefore the maximum effort for a number minimum of cylinders distributed over the entire surface of the beam facing the box spring.

De la sorte, on peut obtenir, selon l'invention, une grande liberté de réglage des niveaux relatifs des rouleaux et de leurs imbrications sans augmenter exagérément la complexité du système de régulation.In this way, it is possible, according to the invention, to obtain great freedom to adjust the relative levels of rolls and their overlaps without increasing the complexity of the regulatory system.

L'invention est, d'ailleurs applicable à tous types de planeuse à multi-rouleaux, les équipages de planage pouvant comporter un nombre plus ou moins grand de rouleaux. D'ailleurs, ceux-ci ne doivent pas nécessairement être associés chacun à une poutre de support et à des vérins de réglage, certains des rouleaux pouvant être fixes. Une telle solution n'est pas couverte par les revendications.The invention is, moreover, applicable to all types of multi-roller levelers, crews leveling may include a number more or less large of rollers. Besides, these should not necessarily be associated each with a beam of support and adjustment cylinders, some of rollers can be fixed. Such a solution is not covered by the claims.

D'autres combinaisons sont possibles, l'installation pouvant s'adapter aux formats et aux caractéristiques des tôles, et pouvant effectuer toutes les corrections nécessaires. Other combinations are possible, the installation can be adapted to formats and characteristics of the sheets, and able to perform all necessary corrections.

Par ailleurs, il est possible d'effectuer un ajustement vertical automatique des rouleaux d'entrée et/ou de sortie pour contrôler, en automatique et pour les différents produits, les phases d'engagement et de dégagement de la tôle.In addition, it is possible to perform a automatic vertical adjustment of the input rollers and / or output to control, automatically and for the different products, the engagement and release of the sheet.

Claims (20)

  1. Imbricated roll leveller for a strip product moving in a longitudinal feed direction (x' x), comprising, inside a fixed frame (1), two levelling systems (2, 2') with spaced parallel rolls, located on either side of the strip with an offset of the rolls defining an undulated path on either side of the mean feed plane of the strip, each levelling system (2) comprising a plurality of rotary levelling rolls (21) with parallel axes, associated, each with support rolls (22) distributed in at least one row over its whole length, the assembly being mounted in a supporting chassis (4) and pressed, on the side opposed to the strip, against a resistant supporting beam (3) which bears on the fixed frame (1), characterized in that the supporting chassis (4) of at least one of the levelling systems (2) comprises a member (40) in the form of a frame inside which a plurality of cross girders (5) are arranged one next to another, equal in number to the levelling rolls (21), mounted so as to slide in said frame (40), independently of each other, each in an adjusting plane (P1) passing through the axis of the corresponding levelling roll (21), each active levelling roll (21) bearing, over all its length, on said girder, via its supporting rolls (22) and each girder (5) bearing individually on the bearing beam (3) via at least two hydraulic jacks (6) interposed between the bearing beam (3) and the girder (5) and distributed across the length of said girder.
  2. The roll leveller according to claim 1, characterized in that each levelling roll (21) is rotatively mounted, at its ends, on two centering bearings (23) linked respectively to the corresponding ends of the associated girder (5), in such a way as to allow a limited relative displacement of said bearings (23) of the roll (21) in relation to the girder (5) when acted on by said hydraulic jacks (6).
  3. The roll leveller according to claim 1 or claim 2, characterized in that it comprises means for adjusting the position of each jack (6) interposed between the supporting beam (3) and each cross girder (5) for individual adjustment of the profile and of the level of at least some of the levelling rolls (4) in relation to the mean feed plane of the strip.
  4. The roll leveller according to any one of claims 1 to 3, characterized in that it comprises means for adjusting the pressure of each of the jacks (6) interposed between the bearing beam (3) and each cross girder (5) for individual adjustment of the adjusting force supported by at least some of the levelling rolls (4).
  5. The roll leveller according to any one of the preceding claims, characterized in that the width of each cross girder (5) is at the most equal to the distance between the axes of the levelling rolls (21), and the jacks (6) which press each girder (5) against the bearing beam (3) each have an elongated section, each jack (6) having a piston (62) whose width in the direction transverse to the girder (5) does not substantially exceed the width of said girder, and whose length is selected so as to define a useful section of the chamber (64) of the jack (6) compatible with the bearing force to be exerted taking into account the number of jacks associated with the girder (5).
  6. The roll leveller according to claim 5, characterized in that the jacks (6) have an oblong section with rounded ends.
  7. The roll leveller according to claim 5 or claim 6, characterized in that each cross girder (5) bears upon the bearing beam (3) via at least three jacks (6) of elongated section, respectively a central jack and two side jacks distributed across the length of the girder.
  8. The roll leveller according to any one of the preceding claims, characterized in that the pressure jacks (6) are mounted in at least one intermediate supporting member (33) interposed between the bearing beam (3) and the cross girders (5).
  9. The roll leveller according to claim 8, characterized in that the member (33) supporting the jacks (6) extends across the whole surface of the levelling system (2) and is provided with several rows of cavities (34) corresponding each to a cross girder (5), and each defining a body (61) of a jack (6) in which a piston (62) is mounted in a sliding way which bears upon the cross girder (5).
  10. The roll leveller according to claim 9, characterized in that the bodies (61) of the jacks (6) located at the same level on the different cross girders (5) are brought together in a single member (61') extending over all the girders (5) and in which a series of cavities (34) is provided centered respectively on said girders (5) and each forming the body (61) of a jack (6) whose piston (62) bears upon the corresponding girder (5).
  11. The roll leveller according to any one of the preceding claims, characterized in that the supporting chassis (4) comprises a rectangular frame (40) surrounding all the rolls (21, 22) and associated with a plurality of transverse guide bulkheads (41) parallel to the axis of the rolls (21) and spaced apart from each other so as to define elongated cavities (45) equal in number to the rolls and in which the cross girders (5) are housed, the two ends of each cross girder being provided with means (52, 52') for bearing against the frame with the possibility of sliding.
  12. The roll leveller according to claim 11, characterized in that each cross girder (5) has a rectangular cross section whose height is at least equal to its width, in order to present sufficient inertia so that said girder (5) makes, with the active roll (21) and the corresponding support rolls, a semirigid assembly able to deform according to the distribution of forces applied to the length of the associated active roll (21), with the possibility of sliding inside the corresponding cavity (45).
  13. The roll leveller according to any one of the preceding claims, characterized in that the supporting chassis (4) is closed, on the opposite side of the rolls, by a plate (43) covering all the cross girders (5) and linking the sides of the frame (40) so as to form a box, said plate (43) being provided near each girder (5) with a plurality of passage holes (44) for the pistons (62) of the jacks (6) interposed between each girder (5) and the bearing beam (3).
  14. The roll leveller according to any one of the preceding claims, characterized in that the assembly formed by the hollow member forming a frame (40) and the cross girders (5) with the active rolls (21) and the associated supporting rolls (22), form a cartridge which can be withdrawn, from the leveller by displacement parallel to the axes of the rolls (21).
  15. The roll leveller according to claim 14, characterized in that in working position, each cartridge is pressed against the corresponding bearing beam (3) by movable clamping devices (36) which bear on said bearing beam (3).
  16. The process for adjusting the levelling effect performed on a strip moving in a longitudinal feed direction (x' x) in an imbricated roll leveller of any one of the preceding claims, characterized in that the position of one of the bearing beams (3) is adjusted in relation to the other (3') to determine a reference level of the whole levelling system (2) in relation to the other (2') and, each levelling roll (21) being mounted, with its supporting rolls (22), on a cross girder (5) mounted so as to slide perpendicularly to the passage plane of the strip and bearing on the corresponding bearing beam (3) via at least two hydraulic jacks (6a, 6b), the relative levels of at least one group of levelling rolls are precisely determined in relation to the reference level, by individual adjustment of the positions of the pressure jacks (6) of the rows of jacks corresponding respectively to the rolls (R1, R2....) of said group, so as to adapt individually the level and the degree of imbrication of each of said rolls (R1, R2....) to a determined distribution of the levelling force on the strip, the pressures applied on each of said jacks (6) being limited to a safety value corresponding to a maximum levelling force taken by each levelling roll (21).
  17. The process according to claim 16, characterized in that an undulated profile is defined comprising a sequence of alternate bends in order to provide a required levelling effect, taking into account the physic and size features of the strip and in that the levels of at least some levelling rolls of the both systems (R1, R2, R5....) are individually adapted by adjusting the corresponding pressure jack positions (6) in order that the active generated lines of the said rolls (R1, R2, R5....) surround the path of the strip in determining the undulation profile previously defined.
  18. The process according to one of claims 16 and 17, characterized in that each girder (5) being associated to at least three pressure jacks (6), respectively a central jack (6a) and two side jacks (6b, 6c), the level of each levelling roll (21) is controlled corresponding to a given degree of imbrication by adjusting the position of the central jack (6a) of the corresponding girders (5) according to the foreseeable yielding of the different parts of the frame, taking into account the forces applied, the difference between the measured positions of the two side pressure jacks (6b, 6c) of said girder (5) is then determined, the said positions then being corrected to bring the measured difference back to a reference difference corresponding to the parallelism of the levelling roll (21) with the reference level.
  19. The process according to claim 18, characterized in that the pressures are distributed between the three jacks (6a, 6b, 6c) of each girder (5), taking into account their relative positions, so that the active generating line of the considered levelling roll (21) in contact with the product is maintained in a straight line.
  20. The process according to any one of claims 16 to 19, characterized in that the leveller comprises an odd number (n) of imbricated rolls, respectively (1, 3, 5..n) on one of the systems (2') and (2, 4, 6...n-1) on the other system (2), the position of the jacks corresponding to at least two rolls, respectively (p) and (q) of each of the two systems, located respectively above and below the strip, is adjusted, and the pressure of the jacks, corresponding to the two pairs of rolls, respectively (p-1, p+1) and (q-1, q+1) surrounding each of said rollers (p, q) adjusted in position is adjusted so as to determine at least two bends in opposite directions on said rollers (p, q), the positions of the latter in each of the two systems (2, 2') and their relative levels in relation to the reference level, in addition to the pressures applied on the rolls surrounding them, being determined according to the features of the strip to be levelled so as to obtain the levelling effect required.
EP96913592A 1995-04-14 1996-04-15 Levelling machine with overlapping rollers, and method for using same Expired - Lifetime EP0765196B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9504557A FR2732912A1 (en) 1995-04-14 1995-04-14 Nested roller planer
FR9504557 1995-04-14
PCT/FR1996/000573 WO1996032212A1 (en) 1995-04-14 1996-04-15 Levelling machine with overlapping rollers, and method for using same

Publications (2)

Publication Number Publication Date
EP0765196A1 EP0765196A1 (en) 1997-04-02
EP0765196B1 true EP0765196B1 (en) 2001-11-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96913592A Expired - Lifetime EP0765196B1 (en) 1995-04-14 1996-04-15 Levelling machine with overlapping rollers, and method for using same

Country Status (9)

Country Link
EP (1) EP0765196B1 (en)
JP (1) JPH10501470A (en)
KR (1) KR970703823A (en)
CN (1) CN1068534C (en)
CA (1) CA2192828C (en)
CZ (1) CZ292110B6 (en)
DE (1) DE69616716T2 (en)
FR (1) FR2732912A1 (en)
WO (1) WO1996032212A1 (en)

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FR2860738B1 (en) * 2003-10-13 2006-02-03 Vai Clecim METHOD OF INCREASING THE ACCURACY OF PRODUCT TRACK CONTROL IN AN IMBRIC ROLL PLANER MACHINE AND PLANTING INSTALLATION FOR CARRYING OUT THE PROCESS
DE102004041732A1 (en) 2004-08-28 2006-03-02 Sms Demag Ag Method of straightening a metal strip and straightening machine
CN100446883C (en) * 2005-03-28 2008-12-31 宝山钢铁股份有限公司 Flattening process for steel strip
CN101804428A (en) * 2010-04-28 2010-08-18 周锋 Levelling machine
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CN103084435B (en) * 2013-01-25 2015-05-13 大连三高集团有限公司 Roll gap adjusting device of plate-levelling machine
CN104148303B (en) * 2014-06-19 2016-01-20 宁波宝新不锈钢有限公司 A kind of cleaning wiping cloth of wiper of temper mill and the installation method of polishing net
DE102015216387A1 (en) * 2015-08-27 2017-03-02 Sms Group Gmbh Straightening machine with modular exchangeable cassette system
KR101888892B1 (en) * 2016-04-04 2018-08-16 주식회사 테크녹스 Manufacturing Apparatus for Embossing Pattern
CN106238509A (en) * 2016-08-24 2016-12-21 南通恒鼎重型机床有限公司 The leveling roll structure of level(l)ing machine
CN110402172B (en) * 2017-03-13 2022-02-25 Sms集团有限公司 Method for operating a roller straightener and roller straightener
KR20200033893A (en) 2017-07-21 2020-03-30 노벨리스 인크. System and method for controlling flatness of metal substrate by low pressure rolling
CN107774742A (en) * 2017-12-07 2018-03-09 中国重型机械研究院股份公司 A kind of new change roll spacing plate-straightening machine
CN111957763A (en) * 2019-05-20 2020-11-20 张挺锋 Work roll and support beam deformation measuring device
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Also Published As

Publication number Publication date
CZ367396A3 (en) 1997-12-17
DE69616716T2 (en) 2002-06-13
EP0765196A1 (en) 1997-04-02
KR970703823A (en) 1997-08-09
CN1155855A (en) 1997-07-30
CA2192828A1 (en) 1996-10-17
WO1996032212A1 (en) 1996-10-17
DE69616716D1 (en) 2001-12-13
CN1068534C (en) 2001-07-18
CZ292110B6 (en) 2003-07-16
JPH10501470A (en) 1998-02-10
CA2192828C (en) 2006-06-06
FR2732912A1 (en) 1996-10-18

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