EP1118395B1 - Verfahren und Vorrichtung zur thermischen Regelung des Walzenprofils in einem Walzwerk - Google Patents

Verfahren und Vorrichtung zur thermischen Regelung des Walzenprofils in einem Walzwerk Download PDF

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Publication number
EP1118395B1
EP1118395B1 EP01400041A EP01400041A EP1118395B1 EP 1118395 B1 EP1118395 B1 EP 1118395B1 EP 01400041 A EP01400041 A EP 01400041A EP 01400041 A EP01400041 A EP 01400041A EP 1118395 B1 EP1118395 B1 EP 1118395B1
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EP
European Patent Office
Prior art keywords
axis
roll
spraying
ramp
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01400041A
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English (en)
French (fr)
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EP1118395A1 (de
Inventor
André Ravenet
Thierry Malard
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Clecim SAS
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VAI Clecim SA
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Publication of EP1118395A1 publication Critical patent/EP1118395A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • the subject of the invention is a method and a device of thermal control of the profile of a cylinder in a rolling mill.
  • a metal strip rolling plant includes, in general, one or more cages of rolling mill each comprising at least two cylinders of work and associated with scroll control means a strip to be rolled between said rolls.
  • each rolling mill cage has two support columns separated and connected by sleepers, between which is mounted a set of cylinders superimposed having parallel axes and placed substantially in the same clamping plane substantially perpendicular to the scroll direction of the product.
  • the rolling product passes between two working cylinders that define the plane of rolling; these cylinders preferably have a diameter relatively small compared to the efforts they are submitted and thus supported respectively on at least two support cylinders between which is applied the effort of rolling.
  • So-called "quarto" rolling mills therefore include four superposed cylinders, respectively two cylinders of associated work, respectively, to two supporting cylinders larger diameter.
  • cylinders intermediaries are interposed between each cylinder of work and the corresponding support cylinder.
  • Cylinders build on each other along substantially parallel, and directed, bearing lines following a generator whose profile, normally rectilinear, depends on the forces applied and the resistance cylinders.
  • the clamping force is applied by screws or jacks interposed between the cage and the ends of the shaft of the upper support cylinder, the lower support cylinder supported by its ends directly on the cage.
  • Such a cylinder comprises a deformable envelope rotative mounting around a fixed shaft on which is applied the tightening force and taking support on this tree via a set of adjustable jacks individually in position and / or pressure by a system of regulation, according to a measure of flatness carried out on the strip, downstream of the rolling mill, the defects of thickness thus determined being compensated by acting on the distribution of the constraints on the width of the band.
  • At least one of the cylinders is associated with a ramp for spraying a coolant comprising a plurality sprinkler bodies spaced apart from each other along a direction parallel to the axis of the cylinder and each provided with a nozzle for spraying a jet of fluid directed on a face of the cylinder turned towards the ramp and whose flow is determined, for each watering organ, by means of a valve controlled individually by an adjustment system.
  • Each spray nozzle is usually equipped a slot for delivering a flat jet centered on a median plane which cuts transversely the axis of the cylinder of to form an elongated impact surface having a low width and extending over part of the height of the cylinder.
  • the cooled zone thus consists of a series of impact surfaces substantially parallel and spaced the each other a distance a little greater than the width of each surface.
  • the median planes of the flat jets in which are placed the major axes of the impact surfaces, are inclined with respect to the axis of the cylinder, so that the impact is distributed, left and right, on both sides the center of the jet, covering a width that overflows slightly above and below the centers of adjacent jets, without interference between surfaces impact.
  • the average flow, per unit of time, of the jet of sprayed fluid on each impact surface can be adjusted individually by the flow control system. It is thus possible to control precisely, by zones Fractional, a variation of the profile, in section cross-section, of the cylinder along the entire length of the zone cooled, so as to modify the distribution of the constraints to correct flatness defects detected downstream.
  • the invention overcomes this drawback by bringing improvements to the systems used so far for the control of rolling mill rolls that allow to obtain a quality of flatness as perfect as possible.
  • the invention uses a system of thermal control of conventional type in which at least one roll of the rolling mill is associated with at least one ramp spraying a fluid to control, by zones fractional, the effect of fluid jets on an area cooled cylinder.
  • the spray boom comprises a central portion with a pitch constant, corresponding to the central zone of the zone cooled, in which each jet of fluid is directed along an injection axis perpendicular to the axis of the cylinder and two side parts with reduced pitch, in which the directions of the axes of the jets are varied relative to the axis of the cylinder, so as to make them converge respectively to two transition zones of both sides of the central zone of the cylinder, the number of jets convergent jets being such that, given their spread on the ramp, each side of the ramp covers a length greater than that of the zone of corresponding transition of the cylinder.
  • the same non-zero angle is inclined by relative to the axis of the cylinder, the median planes of the jets directed on the central area of the cylinder and one increases gradually the angle of inclination of the median planes of jets directed respectively at the two transition zones, as the corresponding impact surface deviates from the central area.
  • the invention therefore applies to a device for thermal control comprising, in known manner, at least one watering boom consisting of a plurality of members spaced coolant supplied with coolant and equipped each of a valve associated with a control system individual flow sprayed by each watering device.
  • the width of the product to be rolled may vary between a minimum width and a width maximum
  • the watering boom includes at least three series of watering organs, respectively, a central series covering a central part of the cooled zone on a length at most equal to the minimum width of the product and in which the watering organs have fixed directions so that the axes of the impact surfaces correspond to a constant step in central part of the cooled zone and two lateral series extending from both sides of the central series to cover, in total, a length at least equal to the width product and in which the watering devices are rotatably mounted on the ramp, each side series being associated with a means for adjusting the orientation of at least one group of pivoting watering organs, so as to reduce the differences between the axes of the impact surfaces in a transition zone at each end of the zone cooled cylinder.
  • each lateral series of watering organs includes, going from the inside to the outside, a first section in which the axes of the jets are orthogonal to the cylinder axis and that covers a first lateral part of the cooled zone of the cylinder on a length such as the total length of the central part of the cooled zone, augmented with said first parts side is less than the width of the strip, and second section in which the axes of the jets are inclined inward in relation to the axis of the cylinder and which covers a second side part of the chilled area on a length such as the total length of said area cooled to at least the width of the strip, every second section of a side series covering, at a end of the cooled zone, a transition zone corresponding to one bank of the strip and in which median axes of the impact surfaces are separated from one distance less than the spacing pitch of said surfaces, respectively in the central part and the first side parts of the
  • the means of adjusting the orientation of the jets include two ways of controlling the pivoting of a group of watering organs, respectively on each side series, each means of command being movable along the ramp and associated with a means of adjusting its position according to the width of the band and a selective engagement means of said means of control with a group of watering organs constituting a second section of each side series to cover a transition zone at each end of the cooled zone.
  • each watering organ comprises a tubular body having an outlet end provided with a jet forming nozzle, and an input end connected to driving via a connecting piece limiting a connecting channel between the inside of the pipe and the inlet end of the tubular body, on which is placed a valve connected individually to the system of setting.
  • each watering organ in each lateral series of the ramp, comprises a tubular body pivotally mounted on the branch piece around at least an axis orthogonal to the axis of the cylinder.
  • each series lateral of watering organs is associated with a means of selective control of the pivoting of a group of organs watering system comprising a slider provided with spread fingers and slidably mounted on a support, along an axis parallel to the supply pipe of the ramp, a control means sliding of the cursor on its support for the setting of the position of the cursor along the ramp and a means of control of the cursor rotation around its axis in two opposite meanings, respectively of commitment and release of the cursor's fingers between the tubular bodies a group of watering organs of the ramp.
  • the fingers of the cursor are spaced a constant distance a little less than the difference between the axes of the tubular bodies of two neighboring watering organs, said fingers of the cursor taking support one after the other on said tubular bodies when sliding the cursor, to determine a progressive variation of the angles of inclination of the jets by relative to the axis of the cylinder.
  • FIGS. 1 and 2 show schematically, respectively in cross-section and in front view, the whole of a quarto-type rolling mill comprising four superimposed rolls, respectively two working rolls 1, 1 'and two support rolls 10, 10 ', the assembly being placed inside a cage 11 carrying means 12 for applying clamping forces on the ends of the shaft of one of the support cylinders 10, another support cylinder 10 'resting on wedges.
  • a product M which passes, in a horizontal plane of movement P 1 , between the two working rolls 1, 1 '.
  • the product M is centered on a vertical plane of symmetry P 2 of the cage.
  • the rolling stock M consists of a metal strip having two banks 13a, 13b separated by a width L which, depending on the type of product to be rolled, can vary between a minimum width L 0 and a maximum width L 1 Generally , the width L of the product is less than the length of the working rolls whose support generatrix 14 is applied to the product only over part of its length. As a result, as indicated above, the rolling force applied by the clamping means 12 between the rolls determines a bending thereof which modifies the distribution of the stresses along the bearing generator. 14, the two banks 13a, 13b of the strip being generally more compressed than the central portion.
  • the mechanical correction devices of flatness in which the distribution of constraints is corrected by cambering the work rolls or in using a deformable envelope support cylinder not allow local adaptation of the cylinder profile to take account of this discontinuity because the deformed cylinder is necessarily progressive.
  • the watering organs have necessarily minimum dimensions that depend on the flow of fluid to pass and congestion mechanical parts and he it is not possible to reduce this clutter below of a certain limit.
  • organs instead of to reduce as much as possible the congestion of watering organs, organs are used, on the contrary, with the necessary dimensions to ensure their reliability and, to improve the accuracy of the control thermal, we simply vary the directions of the jets at both ends of the ramp so as to reduce the distance between the median axes of the impact surfaces on a transition zone of adjustable width, at the level of each side edge of the band.
  • this transition zone can have a 30 to 40 mm wide and the spacing between the axes of the impact surfaces of the jets can be reduced, for example, up to half of the spacing step that corresponds, in the central area, with minimal space requirements watering.
  • two spraying devices 2, 2 'placed respectively on either side of the plane P 1 for moving the band M to be rolled are used. and each comprising at least one ramp 3, 3 'for spraying a coolant on a side face 4 of the corresponding working cylinder 1, 1'.
  • each spray boom 3, 3 ' consists of a plurality of watering devices A arranged side by side, equidistant from one another, on a support block 20 forming a rigid beam carried, to its ends, by the two columns of the cage 11 and which extends parallel to the axis of the working cylinder 1, on the whole length of it.
  • each cooling device 2, 2 ' may also comprise a second ramp 21, 21' fluid spraying. This second ramp is directed towards the upper support cylinder 10, above the band M and in the space between it and the cylinder of lower work 1 ', below the band.
  • the fluid can be distributed by gravity for ensure the lubrication of all the cylinders.
  • Each watering organ A consists of a body tubular 5 fixed by a connecting piece 26 on the block 20, 20 'in which are formed conduits supply, respectively 22 for the spray boom main 3, 3 'and 23 for the secondary ramp 21, 21'.
  • Each connecting piece 26 of a watering member A is placed in communication with the supply line 23 via a connecting channel 24 on which is placed a solenoid valve 25 individually controlled so as to control the feed rate of the water.
  • the tubular body 5 is closed by a nozzle 52 provided with a slot for the formation of a thin flat jet of fluid J, centered on an axis 50 and having a median plane P 3 which transversely crosses the x'x axis of the cylinder.
  • the support blocks 20, 20 'of the two spraying devices 2, 2' are oriented from way that the axes 50 of the fluid jets formed by each ramp 3, 3 'are placed in substantially passing planes by the axes of the corresponding working rolls 1, 1 '.
  • Each jet of fluid J therefore strikes the face 4 of the cylinder facing the next ramp 3 on a surface elongate S having substantially the shape of a rectangle curvilinear with a major axis transverse to the axis x'x and having a small width compared to the distance between the axes of two neighboring jets, so that there is no no interference between the impact surfaces.
  • the effect of cooling can be adjusted locally by zones split.
  • the invention differs from spraying devices usually used by the fact that the spray boom 3 is constituted, as shown diagrammatically on FIG. 3, of three series of watering organs, respectively a central series 31 consisting of organs sprinkler A which are rigidly fixed to the support block 20 and two lateral series, respectively 32a, 32b, consisting of steerable irrigation bodies A 'which are pivoted on the support block 20 and which can be set the orientation to the watered side of the cylinder 1.
  • each organ A, A 'must have sufficient dimensions to ensure reliable operation.
  • the pieces of branching 26 are therefore separated from each other, the along ramp 3, with a constant step (a) which corresponds to the minimum size of the watering devices.
  • the number of stationary sprinklers A constituting the central series 31 of the ramp 3 is determined, as a function of the spacing pitch (a), so as to cover a length of the same order as the minimum width L 0 of the bandaged.
  • the axes 50 of the sprayed jets are perpendicular to the x'x axis of the cylinder 1 so that the impact surfaces of the jets J are spaced apart by the same pitch.
  • each lateral series 32a, 32b are spaced apart by the same step (a) and their number is determined according to the remaining length (L 1 -L 0 ) / 2 of the ramp, so as to cover the maximum width L 1 of the strip.
  • the length of the cooled zone 4 must be limited to the effective part of the cylinder.
  • the solenoid valves 25 associated with each watering member A, A ' are controlled individually by a flow control system that determines, according to the effective width L of the band, the number of sprinklers whose valves are open.
  • the length of the ramp that is to say the distance between the axes of the nozzles respectively placed at both ends thereof, substantially corresponds to the maximum width L 1 of the product.
  • the width L of the product is less than this maximum width, there is therefore, at each end of the ramp 3, a number of watering members corresponding to the part of the cylinder 1 which is not covered by the strip. and whose valves are closed.
  • FIG 2 for example, there is shown schematically a rolling mill having a maximum width L 1 . It can be seen that, if the product has a width L, the valves of the sprinklers are open only on a central part of the ramp covering the same length L of the cylinder as the product and are closed at both ends, over a length ( L 1 -L) / 2.
  • the fluid is distributed regularly on a cooled area of the cylinder of work 1, which extends over a length substantially equal to the distance L between the two edges 13a, 13b of the product, the remaining parts of the cylinder 1 not being cooled.
  • the thermal control of the distribution of the stresses can be carried out in a conventional manner, by sprinkling jets of fluid regularly distributed over a central zone of the corresponding face of the working cylinder 1.
  • the spacing pitch of the impact surfaces of the fluid jets is narrowed by so as to achieve two transition zones corresponding, respectively, to the strip zones 15a, 15b of the strip and in which the thermal control is provided more accurately so as to correct any residual defects.
  • the ramp 3 comprises three sets of watering organs, respectively a central series 31 and two side series 32a, 32b. The whole is represented schematically on the figure 3.
  • each side series 32a, 32b is consisting of steerable irrigation bodies A 'which are pivotally mounted on the support block 20 in a manner that will be described in detail later and whose orientation may to be determined by means of a cursor 6. This one moves along the ramp 3, parallel to the x'x axis of the cylinder and can engage on a number of watering organs 42 of each side series 32.
  • the strip to be rolled has a width L close to the maximum width L 1 of the strip.
  • the two sliders 6a, 6b which will be described in detail later, are therefore placed at the two ends of the ramp 3 so as to converge towards the inside of the strip, that is towards the plane of symmetry P 2 two groups of sprinklers respectively placed at both ends of the ramp 3 and each comprising, for example, six sprinklers.
  • Each side series 32 thus comprises two sections, respectively a first section 33 and a second section 34.
  • the sprinklers A'1 are directed perpendicular to the x'x axis of the cylinder.
  • the second section 34 that extends beyond section 33 up the end of the effective part of the ramp 3 whose valves are open, the watering organs A'2, oriented by the cursor 6, converge towards the inside of the band.
  • Each part of the ramp 3 thus defined determines watering a corresponding part of the watered side 4 of the cylinder which therefore comprises a central part 41 watered by the central series 31 of the ramp 3 and extended, each side, respectively by a first lateral part 43 watered by the first section 33 of the side series 32 and a second side portion 44 sprayed by the second section 34.
  • the impact surfaces of the jets are regularly removed from the step (a) corresponding to the constant spacing of the watering organs.
  • the second side portions 44a, 44b, placed respectively at both ends of the cooled zone 4 constitute transition zones in which the impact surfaces are closer together, allowing for to control, more precisely, the thermal effect of watering to compensate for any residual defects observed downstream on both banks of the strip.
  • the total length of the ramp 3 should be a bit larger than the total length of the cooled zone 4.
  • the flow control system determines the closing of the valves of a number of sprinklers which constitute, at each end of the ramp, a third section of the side series 32a, 32b whose valves are closed.
  • the two sliders 6a, 6b are moved inward so as to engage respectively at each end of the effective part of the ramp 3 whose valves are open, on a group of watering organs whose jets converge on a transition zone 44 of the cooled surface 4 of the cylinder, at each end thereof.
  • this part of the ramp whose valves are open shall cover a length greater than that of the cooled zone 4 of cylinder which is itself, preferably, a little superior to the actual width of the product (L).
  • each zone transition 44a, 44b extends outward beyond the edge 13a, 13b of the band, which makes it possible to better avoid the discontinuity in the distribution of constraints, controlling the profile of the support generator on an area transition completely covering the edge of the band.
  • FIG. 5 shows, in axial section, a watering member A 'of pivoting type comprising, as usually, a tubular body 5 limiting a channel of injection centered on an axis 50 and having an end input 51 connected by a connecting piece 26 to the block of support 20 not shown in Figure 5 and an end of outlet provided with a nozzle 52 having a formation slot a flat stream of fluid.
  • the body tubular 5 is rigidly fixed to the branch member 26.
  • the end 51 of the tubular body 5 consists of a part spherical 51 taken in a housing in two parts constituting the branching member 26, so as to constitute a swivel joint with a simple assembly game.
  • the seal is provided by an annular seal 28 placed between the two parts of the housing 26.
  • the latter is provided with a machining having two plane faces parallel to the x'x axis of the working cylinder and on which are threaded two dishes 53 formed at the base of the tubular body 5.
  • This one can only rotate around a perpendicular axis on both sides 53, so that the axis 50 of the body tubular 5 moves in a plane.
  • the support block 20 is oriented so that this plane passes substantially by the x'x axis of the working cylinder 1.
  • the housing 26 is provided, on the side of the tubular body 5, of an indentation 27 which opens on one side so as to allow orientation, on this side, of the tubular body 5 against the action of a spring loaded pusher 54 which, in the absence external stresses, plate the tubular body 5, in the opposite direction, against the housing 26 in the position represented in FIG. 5 for which the axis 50 of the body tubular is perpendicular to the x'x axis of the cylinder.
  • the nozzle 52 is mounted on a tip 55 which is immobilized in translation relative to the tubular body 5 but can turn around the axis 50 of it.
  • the nozzle 52 is applied and fixed on the nozzle 55 by means of a clamping flange 52 'provided with a nut. It is thus possible to adjust an angle of inclination (k) of the median plane P 3 of the jet relative to the axis x'x of the cylinder 1.
  • the nozzles 52 are adjusted so that the impact surfaces S are parallel.
  • each watering organ orientable A ' is provided with a means of variation of the inclination (k) of the median plane of the jet as a function of the orientation variation (i) of the axis 50 thereof.
  • a means of variation of the inclination (k) of the median plane of the jet as a function of the orientation variation (i) of the axis 50 thereof.
  • FIGS. 10 and 11 there is shown respectively in front view and in top view, the whole of a spray boom with the control system of the orientation of the watering organs.
  • each slider 6 At each end of the ramp is a slider 6 which is slidably mounted, without the possibility of rotation, on a shaft 61, passing below the organs watering A 'of the ramp 3.
  • This slider 6 carries a plurality of regularly spaced apart fingers 62 projecting so as to pass between the tubular bodies 5 of a group of watering organs A'2. So, in the example shown in Figure 10, which corresponds to Figure 3, each slider 6 carries six fingers 62 which each extend to the level of the tubular body 5 of a watering member A'2 so as to take support laterally on it when the cursor 6 slide along the shaft 61.
  • This sliding movement is controlled by a nut 7 engaged on a screw 71 and locked in rotation so to move longitudinally, with the cursor 6 when the screw 71 is driven in one direction or the other, by a hydraulic motor 72.
  • the fingers 62 of the slider 6 are moved one step away constant (a ') which is a little smaller than the step (a) between axes 50 sprinkler organs A.
  • a ' constant
  • the six fingers 62 of the slider come successively bearing on the tubular bodies 5 corresponding six irrigation organs A'2. These begin to rotate one after the other and it results that the angle of inclination (i) of the axis 50 of an organ of irrigation 5 with respect to the axis x'x of the cylinder decreases in going from the inside to the outside, the way represented in FIG.
  • the arrangement is symmetrical with respect to plane P 2 of symmetry of the rolling mill, the device comprising two sliders 6a, 6b whose displacements in opposite directions are controlled by two screws 71a, 71b having inverted and connected threads. by an extension 73.
  • the rotation of the two screws, in one direction or the other, is controlled by a hydraulic motor 72 via a bevel gear.
  • Each cursor 6a, 6b is thus placed at a level group of watering organs A'2 whose jets converge towards a transition zone 44a, 44b, at each end of the cooled zone 4 of the cylinder.
  • Each cursor can move between two positions limits corresponding to both ends of each series 32a, 32b, respectively, an external position represented in solid lines in FIG. 10 and a position internal represented in dotted lines.
  • each slider 6a, 6b is associated with a pneumatic cylinder 63 whose stem carries a rack 64 on which meshes a toothed wheel 65 wedged at the end of the shaft 61 of cursor guidance 6.
  • the cursor 6 is consisting of a tubular sleeve mounted sliding axially along the shaft 61 but wedged in rotation with this one.
  • a rotation of the controlled shaft 61 by the pinion 65 and the rack 64 determines the rotation of the slider 6 with, in one direction, the engagement of the fingers 62 between the tubular bodies 5 of the watering organs corresponding and, in the other direction, their clearance in the position 62 'shown in dashed lines in FIG. this position 62 'the fingers are placed below the level of the watering organs and do not therefore oppose sliding of the slider 6.
  • the nut 7 is provided of a protruding training part 73 which engages in a circular groove 66 of the slider 6 allowing the rotation of it around its axis.
  • the displacement hydraulic motor 72 sliders is equipped with a two-speed control controlled by a pulse generator so as to realize, on the one hand a fast movement of the sliders 6a, 6b for the choice of the group of watering organs to guide and, other a fine adjustment of the cursor position for to determine an optimal reduction of the spacing impact surfaces according to the edge defects to be corrected.
  • FIG. 4 diagrammatically shows the impact surfaces S jets on the cooled side of the working cylinder 1.
  • each watering member 5 is substantially concurrent with the x'x axis of the cylinder 1 and the nozzle 52 forms a flat jet, of small thickness, which is centered on a median plane P 3 transversely intersecting the x'x axis.
  • the nozzles 52 are adjusted so that the median planes P 3 of the impact surfaces S are parallel and inclined at the same angle (k) with respect to the x'x axis of the cylinder.
  • the cooling effect applies not only to the entire width (a) of the zone corresponding to the jet considered, but also to a part of the two adjacent zones, the covering (r) can be, for example, half of the step (a).
  • the opening or closing of each valve 25 is controlled by all or nothing, the cooling effect is distributed over the entire length of the watered side 4 of the cylinder 1.
  • the axes 50 of the sprinklers are spaced apart from each other by the same pitch (a) and the median planes P 3 of the jets are parallel and inclined at the same angle ( k) with respect to the x'x axis of the cylinder 1.
  • the sprinklers are oriented so as to reduce the distance between the axes of the jets to a step that can be, for example, half of the constant pitch (a) in the central portion 41 and the first lateral portion 43.
  • the end piece 55 on which the nozzle 52 is fixed is provided with a pallet 56 on which a torsion spring 57 rests, the opposite end of which is engaged in a hole of the tubular body, at the end of entry of it.
  • the pallet 56 is applied by the spring 57 against a pin 58 fixed on the branch member 26 and the median plane P 3 is then inclined by the angle (k) corresponding to the setting of the nozzle.
  • the variation of the angle of inclination (k) of the median plane P 3 of a jet depends on the length of the corresponding finger 62.
  • the overlap (r 1 ) between two adjacent impact surfaces is reduced in the same way as their spacing (a 1 ) and remains of the order of half of it.
  • the gradual variation of the angle of inclination (k) avoids interference between the impact surfaces S, the side where they converge.
  • Figure 12 shows, in three successive diagrams, the progressive movement of the cursor 6 relative to a starting position, which determines the progressive inclination of the jets and the tightening of the impact surfaces.
  • Figure 12a shows the position of the cursor 6 to from which all the fingers 62 have come into contact with the watering organs forming the steerable section 34 from the ramp.
  • the angle of inclination (i) of the axes 50 of the jets fluid therefore increases gradually since the first nozzle 5a to the last nozzle 5b of section 34, which in this cursor position, is still directed perpendicular to the axis of the cylinder.
  • the center of the jet of the first nozzle 5a of the series is then at a distance (c 1 ) from the starting position of the cursor 6, for which the same jet was perpendicular to the axis of the cylinder and the transition zone 44a extends over a width (d 1 ) to the axis of the first nozzle 5c of section 33.
  • the last nozzle 5b of section 34 has not yet begun to pivot and its axis is therefore found at the distance (a) from the axis of the nozzle 5c, for example 50 mm.
  • Figure 12b shows an intermediate position and the Figure 12c shows the final position for which the axes jets are regularly removed from the half-step (a / 2), by example 25 mm.
  • transition zone has shifted slightly inwards the distance (c 2 ) having increased and that, at the same time, its width (d 2 ) has slightly decreased with respect to the initial width (d 1 ).
  • the progressive tightening of the axes of the jets is accompanied by a gradual recovery of their median planes which allows to ensure a regular distribution of fluid throughout the height of cooled face 4.
  • the nozzles currently used normally correspond to a spacing pitch of 50 mm about, it is quite certain that this spacing is function available equipment and characteristics of the rolling mill on which the device is installed.
  • each nozzle is usually equipped with a slot for the formation of a flat section jet substantially rectangular but we can also use several orifices distributed in a fan and whose jets are confuse to form, on the cylinder, an impact surface elongated, narrow width.
  • each additional sprinkler 8 placed on one side of the band is mounted on a slider 80 which is shaped so as to let the passage of the first screw 71.
  • Each nozzle 8 is fed by a channel formed inside the slider 80 and on which is connected, via a swivel joint, a supply line 83, as shown in FIG. conduit 83 is slidably mounted in a sealed manner in a fixed tube 84 which extends on either side of the plane of symmetry P 2 and is connected to a central supply 85.
  • Each additional nozzle 8 forms a flat jet J 'of preferably oriented vertically and that can move under the action of the screw 81, so as to be positioned with accuracy according to the fault to be corrected.
  • the support 81 is consists of two screws with reverse pitch connected by an extension and engaging respectively in threaded bores arranged on each slider 80a, 80b.
  • a hydraulic motor 82 controlling the rotation of the screw 81 determines equal displacements, in opposite directions of the sliders 80a, 80b and thus makes it possible to adjust the positions of jets J 'of the two nozzles 8a, 8b with respect to the two edges of the strip, the corresponding conduits 83a, 83b sliding in both ends of the central tube 84.
  • a pulse generator makes it possible to control these displacements, in the opposite direction, of the two sliders 80a, 80b of to precisely adjust the position of the two nozzles 8a, 8b with respect to the two edges of the strip.
  • both nozzles 8 can be fed at a different temperature than the nozzles A of the ramp 3, the coolant being able to besides, to be of another nature.
  • the invention provides several means of thermal control whose effects can be combined so as to obtain a similar flatness quality perfect as possible.
  • irrigation ramps and mechanisms associates constitute compact sets that can be easily installed, even in a rolling mill cage existing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Nozzles (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Secondary Cells (AREA)

Claims (25)

  1. Verfahren zur thermischen Regelung des Walzenprofils in einem Walzwerk, umfassend Mittel zur Ablaufsteuerung zwischen mindestens zwei Walzen (1, 1') mit parallelen Achsen eines Walzprodukts (M), das von einem Band mit zwei Rändern (13), die um eine gewisse Breite (L) beabstandet sind, gebildet ist, wobei mindestens eine Walze (1) mit mindestens einer Rampe (3) zur Besprengung mit einem flüssigen Kühlmittel verbunden ist, umfassend eine Vielzahl von Besprengungselementen (A), die voneinander entlang einer Richtung parallel zur Achse (x'x) der Walze (1) beabstandet und jeweils mit einer Sprühdüse (52) für einen Flüssigkeitsstrahl (J) versehen sind, der auf eine Einspritzachse (50) zentriert ist, die im Wesentlichen durch die Achse (x'x) der Walze (1) verläuft und auf einer Fläche (4) der Walze (1), die zu der Rampe gerichtet ist, eine Auftrefffläche (S) mit länglicher Form bildet, die eine große Achse aufweist, die sich in einer Mittelebene (P3) befindet, die quer die Achse (x'x) der Walze (1) schneidet, wobei jedes Besprengungselement (A) mit einem Ventil (25) versehen ist, das von einem System zur Regelung der Durchflussmengen für die Besprengung der Walze (1) durch Öffnen der Ventile (25) auf einem Teil der Rampe (3) gesteuert wird, das das Sprühen des Fluids auf eine gekühlte Zone (4) der Walze (1) und das Schließen der Ventile (25) auf den übrigen Teilen der Rampe (3) bestimmt, wobei die gekühlte Zone (4) mit einer Reihe von Auftreffflächen (S) bedeckt ist, deren Mittelachsen um einen gewissen Abstand (a) voneinander entfernt sind, und wobei das Regelungssystem individuell die durchschnittliche Durchflussmenge pro Zeiteinheit des auf jede Auftrefffläche (S) gesprühten Fluidstrahls bestimmt,
    dadurch gekennzeichnet, dass der Abstand (a) zwischen den Mittelachsen der Auftreffflächen (S) in Abhängigkeit von der Position der Auftreffflächen auf der Länge der gekühlten Zone (4) so variiert wird, dass diese eine zentrale Zone (41, 43), in der die Auftreffflächen um einen im Wesentlichen konstanten Abstand (a) voneinander entfernt sind, und zwei Übergangszonen (44) umfasst, die sich beiderseits der zentralen Zone mindestens bis auf die Höhe der beiden Ränder (13) des Bandes (M) erstrecken, wobei der Abstand zwischen den Mittelachsen der Auftreffflächen (S) in Bezug auf den konstanten Abstand (a) der zentralen Zone (41, 43) verringert wird.
  2. Regelungsverfahren nach Anspruch 1, dadurch gekennzeichnet, dass jeder flache Strahl (J) auf einer Mittelebene (P3) zentriert ist, die um einen nicht rechten Winkel (k) in Bezug auf die Achse (x'x) der Walze (I) geneigt ist, damit sich die entsprechende Auftrefffläche (S) quer auf der Walze erstreckt, wobei sie sich symmetrisch in Bezug auf die Enspritzachse (50) beiderseits einer Querebene (P4), die durch die Einspritzachse (50) verläuft und zur Achse (x'x) der Walze senkrecht ist, entfernt.
  3. Regelungsverfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass in einem zentralen Teil (31, 33) der Besprengungsrampe (3), der der zentralen Zone (41, 43) der gekühlten Zone (4) entspricht, jeder Fluidstrahl (5) entlang einer Einspritzachse (50) senkrecht auf die Achse (x'x) der Walze ausgerichtet ist, und dass in den seitlichen Teilen (34) der Rampe (3) beiderseits des zentralen Teils die Ausrichtung der Achse (50) jedes Strahls in Bezug auf die Achse (x'x) der Walze variiert wird, wobei die Strahlen einer gewissen Anzahl von Düsen (A'2) der beiden seitlichen Teile (34) der Rampe (3) jeweils zu den beiden Übergangszonen (44) der Walze (1) zusammengeführt werden, wobei die Anzahl von Düsen (A'2) mit konvergierenden Strahlen derart ist, dass auf Grund ihres Abstandes auf der Rampe (3) jeder seitliche Teil (34) der Rampe (3) eine Länge abdeckt, die größer als jene der entsprechenden Übergangszone (44) der Walze (1) ist.
  4. Regelungsverfahren nach Anspruch 3, dadurch gekennzeichnet, dass die Mittelebenen der Strahlen, die auf die zentrale Zone (41, 43) der Walze (1) gerichtet sind, um einen selben Winkel (k) ungleich Null in Bezug auf die Achse (x'x) der Walze geneigt sind, und dass der Neigungswinkel der Mittelebenen der jeweils auf die beiden Übergangszonen (44) gerichteten Strahlen vergrößert wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass in jeder Übergangszone (44) gleichzeitig ausgehend von der zentralen Zone (41, 43) und nach außen weggehend eine progressive Verringerung der Neigung (i) der Achse (50) der Fluidstrahlen (J) und eine progressive Steigerung der Neigung (k) ihrer Mittelebene (P3) in Bezug auf die Achse (x'x) der Walze (1) bestimmt werden.
  6. Vorrichtung zur thermischen Regelung des Profils einer Walze in einem Walzwerk, umfassend mindestens zwei Walzen (1, 1') mit parallelen Achsen und Mittel zur Steuerung der Bewegung zwischen den Walzen eines Walzproduktes, das von einem Band (M) gebildet ist, das zwei Ränder (13) aufweist, die um eine gewisse Breite (L) beabstandet sind, und wobei (1) mindestens eine der Walzen des Walzwerks mit einer Vorrichtung (2) zur thermischen Regelung verbunden ist, die mindestens eine Besprengungsrampe (3) umfasst, die von einer Vielzahl von im Abstand angeordneten Besprengungselementen (A) gebildet ist, die auf der gesamten Länge der Walze (1) parallel zu ihrer Achse (x'x) verteilt und mit einer Schaltung (22) zur Versorgung mit einem flüssigen Kühlmittel verbunden sind, wobei jedes Besprengungselement (A) mit einem Ventil (25) versehen ist und eine Düse (52) zur Erzeugung eines Fluidstrahls (J) umfasst, der auf eine Einspritzachse (50) zentriert ist, die im Wesentlichen mit der Achse (x'x) der Walze (1) zusammenläuft und auf einer Fläche (4) der Walze, die zur Rampe gewandt ist, eine Auftrefffläche (S) mit länglicher Form bildet, die eine große Achse aufweist, die in einer Mittelebene (P3) des Strahls angeordnet ist, der quer die Achse (x'x) der Walze schneidet, wobei die Rampe (3) mit einem System zur Regelung der Besprengungsmengen durch individuelle Steuerung der Ventile (25) jedes der Besprengungselemente (A) verbunden ist, das einerseits die Öffnung der Ventile (25) auf einem Teil der Rampe (3) für das Sprühen von Fluid auf eine gekühlte Zone (5) der Walze mit Verschluss der Ventile (25) auf den übrigen Teilen der Rampe (3) und andererseits die individuelle Regelung der durchschnittlichen Durchflussmenge pro Zeiteinheit des auf jede Auftrefffläche (S) gesprühten Flüssigkeitsstrahls (5) bestimmt,
    dadurch gekennzeichnet, dass, da die Breite (L) des Walzproduktes zwischen einer minimalen Breite (L0) und einer maximalen Breite (L1) variieren kann, die Besprengungsrampe (3) mindestens drei Reihen von Besprengungselementen umfasst, eine mittlere Reihe (31), die einen mittleren Teil (41) der gekühlten Zone (4) auf einer Länge höchstens gleich der minimalen Breite (L0) des Produkts (M) abdeckt und in der die Besprengungselemente (A) feste Ausrichtungen haben, so dass die Achsen (50) der entsprechenden Auftreffflächen (S) in einem konstanten Abstand (a) in dem mittleren Teil (41) der gekühlten Zone (4) voneinander entfernt sind, und zwei seitliche Reihen (32a, 32b), die sich beiderseits der mittleren Reihe (31) erstrecken, um insgesamt eine Länge mindestens gleich der maximalen Breite (L1) des Produktes abzudecken, und in denen die Besprengungselemente (A') schwenkbar auf der Rampe (3) befestigt sind, wobei jede seitliche Reihe (32) mit einem Mittel (6, 7) zur Regelung der Ausrichtung von mindestens einer Gruppe von schwenkbaren Besprengungselementen verbunden ist, um die Abstände zwischen den Achsen der Auftreffflächen an jedem Ende der gekühlten Zone des Zylinders zu verringern.
  7. Vorrichtung zur thermischen Regelung nach Anspruch 6, dadurch gekennzeichnet, dass das Walzwerk und das zu walzende Band in Bezug auf eine Längsebene (P2) symmetrisch sind, wobei jede seitliche Reihe (32a, 32b) von Besprengungselementen (A') von innen nach außen einen ersten Abschnitt (33a, 33b), in dem die Achsen der Strahlen orthogonal zur Achse (x'x) der Walze (1) sind und der einen ersten seitlichen Teil (43a, 43b) der gekühlten Zone (4) der Walze auf einer derartigen Länge abdeckt, dass die Gesamtlänge (L') des mittleren Teils (41) der gekühlten Zone (4), vergrößert um die ersten seitlichen Teile (43a, 43b), geringer als die Breite (L) des Bandes ist, und einen zweiten Abschnitt (34a, 34b) umfasst, in dem die Achsen (50) der Strahlen nach innen in Bezug auf die Achse (x'x) der Walze geneigt sind und der einen zweiten seitlichen Teil (44a, 44b) der gekühlten Zone (4) auf einer derartigen Länge abdeckt, dass die Gesamtlänge der gekühlten Zone (4) mindestens gleich der Breite (L) des Bandes ist, wobei jeder zweite Abschnitt (34) einer seitlichen Reihe (32) an einem Ende der gekühlten Zone (4) eine Übergangszone (44) abdeckt, die einem Rand (13) des Bandes (M) entspricht und in der die Mittelachsen der Auftreffflächen (S) um einen Abstand entfernt sind, der kleiner als der Abstand (a) der Flächen (S) in dem Mittelteil (41) bzw. den ersten seitlichen Teilen (43a, 43b) der gekühlten Zone (4) ist.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Mittel zur Regelung der Ausrichtung der Strahlen zwei Mittel (6a, 6b) zur Steuerung des Schwenkens einer Gruppe (34a, 34b) von Besprengungselementen auf jeder seitlichen Reihe (32a, 32b) der Rampe (3) umfassen, wobei jedes Steuermittel (6) entlang derselben bewegbar und mit einem Mittel (7) zur Regelung seiner Position in Abhängigkeit von der Breite (L) des Bandes (M) und mit einem Mittel (64, 65) zum selektiven Eingreifen des Steuermittels (6) in eine Gruppe von Besprengungselementen versehen ist, die einen zweiten Abschnitt (34) jeder seitlichen Reihe (32) darstellen, um eine Übergangszone (44) an jedem Ende der gekühlten Zone (4) abzudecken.
  9. Vorrichtung nach einem der Ansprüche 6 bis 8, bei der die Besprengungsrampe (3) eine Leitung (22) umfasst, die mit einem Fluidversorgungskreis verbunden ist und an die eine Vielzahl von beabstandeten Besprengungselementen (A) angeschlossen sind, dadurch gekennzeichnet, dass die Besprengungselemente (A) voneinander um einen Mindestabstand entfernt sind, der vom Platzbedarf jedes Besprengungselements in der Breite abhängt und den konstanten Abstand (a) zwischen den Mittelachsen (50) der Auftreffflächen (S) in dem Mittelteil (41) und den ersten seitlichen Teilen (43) der gekühlten Zone (4) bestimmt.
  10. Vorrichtung nach Anspruch 9, bei der jedes Besprengungselement (A) einen röhrenförmigen Körper (5) umfasst, der ein Austrittsende, das mit einer Düse (52) zur Erzeugung des Strahls (J) versehen ist, und ein Entrittsende aufweist, das mit der Versorgungsleitung (22) über einen Anschlussteil (26) verbunden ist, der einen Verbindungskanal (24) zwischen der Leitung (22) und dem Eintrittsende des röhrenförmigen Körpers (5) begrenzt, auf dem ein Ventil (25) angeordnet ist, das individuell mit dem Regelungssystem verbunden ist, dadurch gekennzeichnet, dass jedes Besprengungselement (A) einer seitlichen Reihe (32) der Rampe einen röhrenförmigen Körper (5) umfasst, der schwenkbar auf dem Anschlussteil (26) um mindestens eine Achse (y'y), die zur Achse (x'x) der Walze (1) orthogonal ist, befestigt ist, und mit einem Steuersystem (6, 7) für die Drehung des röhrenförmigen Körpers (5) um die Schwenkachse verbunden ist.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, dass der Anschlussteil (26) jedes Besprengungselements (A) ein Gehäuse (26) umfasst, das einen Hohlraum begrenzt, der eine kreisförmige Innenfläche aufweist, die auf einer Achse (y'y) zentriert ist, die zur Achse der Walze (x'x) orthogonal ist, und dass der röhrenförmige Körper (5) des Besprengungselements (A) mit einem ringförmigen Raum (51) versehen ist, der ein zu jenem des Hohlraums passendes Profil aufweist und in diesem mit einem einfachen Montagesatz angeordnet ist.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass der röhrenförmige Körper (5) kugelförmig drehbar im Inneren des Hohlraums des Gehäuses (26) montiert ist und mindestens eine ebene Führungsfläche (53) parallel zur Achse (x'x) der Walze (1) umfasst und auf einer entsprechenden ebenen Fläche des Gehäuses (26) zur Auflage gelangt, um ein Schwenken des röhrenförmigen Körpers (5) um eine Achse (y'y), die senkrecht zu den ebenen Flächen (53) verläuft, zu ermöglichen.
  13. Vorrichtung nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, dass jedes Besprengungselement ein Mittel (56) zur Regelung eines Neigungswinkels (k) der Mittelebene (P3) des flachen Strahls (J) in Bezug auf die Achse (x'x) der Walze (1) umfasst.
  14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass die Düse (52) jedes Besprengungselements drehbar auf dem röhrenförmigen Körper (5) um die Achse (50) des Strahls (J) befestigt ist und dass das Besprengungselement mit Mitteln (56) zur Steuerung einer Drehung der Düse (52) um die Achse (50) des Strahls zur Regelung einer Veränderung der Neigung (k) seiner Mittelebene (P3) in Bezug auf die Achse (x'x) der Walze verbunden ist.
  15. Vorrichtung nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, dass jede seitliche Reihe (32) von Besprengungselementen (A') mit einem Mittel (6, 7) zur selektiven Steuerung einer Gruppe (34) von Besprengungselementen verbunden ist.
  16. Vorrichtung nach Anspruch 15, dadurch gekennzeichnet, dass das Mittel zur selektiven Steuerung der Ausrichtung einen Curser (6) umfasst, der mit beabstandeten Fingern (62) versehen und gleitend auf einem Träger (61) befestigt ist, der sich entlang der Rampe (3) erstreckt, ein Mittel (7) zur Steuerung des Gleitens des Cursers (6) auf seinem Träger (61) für die Regelung der Position des Cursers (6) entlang der Rampe (7) und ein Mittel (64, 65) zur Steuerung der Drehung des Cursers (6) um seine Achse in zwei entgegen gesetzte Richtungen des Eingreifens bzw. Lösens der Finger (62) des Cursers (6) zwischen den röhrenförmigen Körpern (5) einer Gruppe (34) von Besprengungselementen (A') der Rampe (3) umfasst.
  17. Vorrichtung nach Anspruch 16, dadurch gekennzeichnet, dass sie ein Mittel zur raschen Steuerung des Gleitens des Cursers (6) entlang seines Trägers (61) für die Auswahl der Gruppe (34) von Besprengungselementen (A'), die geschwenkt werden sollen, in Abhängigkeit von der Breite (L) des Bandes (M) und ein Mittel zur langsamen Steuerung des Gleitens des Cursers (6) für die Feinregelung der Ausrichtungen der von der Gruppe (34) von Besprengungselementen gesprühten Strahlen umfasst.
  18. Vorrichtung nach einem der Ansprüche 16 und 17, dadurch gekennzeichnet, dass die Finger (62) des Cursers um einen konstanten Abstand (a') entfernt sind, der etwas kleiner als der Abstand (a) zwischen den Achsen der röhrenförmigen Körper (5) von zwei benachbarten Besprengungselementen ist, wobei die Finger (62) des Cursers nacheinander auf den röhrenförmigen Körpern (5) beim Gleiten des Cursers (6) zur Auflage gelangen, um eine progressive Variation der Neigungswinkel (i) der Achsen der Strahlen in Bezug auf die Achse (x'x) der Walze (1) zu bestimmen.
  19. Vorrichtung nach einem der Ansprüche 16 bis 18, dadurch gekennzeichnet, dass jedes ausrichtbare Besprengungselement (A') eine Düse (52), die drehbar auf dem röhrenförmigen Körper (5) um die Achse (50) des Strahls (J) befestigt ist, und ein Mittel (56) zum Drehen der Düse (52) umfasst, das von dem Curser (6) zur Steuerung der Ausrichtung des Besprengungselements (A') betätigt wird.
  20. Vorrichtung nach Anspruch 19, dadurch gekennzeichnet, dass der Curser (6) mit Fingern (62) versehen ist, die zwischen den röhrenförmigen Körpern (5) einer Gruppe von Besprengungselementen durch Drehung des Cursers (6) um eine Achse eingreifen können, und dass das Mittel zum Drehen der Düse (52) jedes Besprengungselements von einer Platte (56) gebildet ist, die drehfest mit der Düse (52) verbunden ist und auf der der entsprechende Finger (62) des Cursers (6) bei der Drehung desselben für das Eingreifen der Finger zur Auflage gelangt, wobei das Eingreifen somit eine Drehung der Düse (52) um die Achse (50) des Strahls bestimmt.
  21. Vorrichtung nach Anspruch 20, dadurch gekennzeichnet, dass die Länge der Finger (62), die auf dem Curser (6) vorgesehen sind, von innen nach außen größer wird, um eine progressive Vergrößerung des Neigungswinkels (k) des Strahls (J) zu den Enden der gekühlten Zone (4) der Walze hin zu bestimmen.
  22. Vorrichtung zur thermischen Regelung nach einem der Ansprüche 6 bis 21, dadurch gekennzeichnet, dass sie zusätzliche Mittel (8) zum Sprühen eines Fluidstrahls auf jeden Rand (13a, 13b) des Bandes (M) umfasst, die jeweils von einem Besprengungselement (8) gebildet sind, das gleitend auf einem Träger parallel zur Achse (x'x) der Walze (1) befestigt und mit einem Mittel (80) zur Steuerung der Bewegungen des Besprengungselements (8) in Abhängigkeit von der effektiven Breite (L) des Bandes (M) zur Regelung der Position der entsprechenden Auftrefffläche in Bezug auf den Rand (13) des Bandes verbunden ist.
  23. Vorrichtung nach Anspruch 22, dadurch gekennzeichnet, dass sie getrennte Mittel (84, 85) zur Fluidversorgung der zusätzlichen Besprengungsmittel (8) umfasst.
  24. Vorrichtung nach Anspruch 22, dadurch gekennzeichnet, dass sie zwei zusätzliche Besprengungselemente (8a, 8b), die gleitend auf einem selben Träger (81) befestigt sind, und Mittel (82) zur Steuerung von gleichen Bewegungen der beiden Elemente (8a, 8b) in entgegen gesetzte Richtungen auf dem Träger (81) umfasst.
  25. Vorrichtung nach Anspruch 22, dadurch gekennzeichnet, dass jedes zusätzliche Besprengungselement (8a, 8b) von einem Curser (80a, 80b) getragen wird, der mit einer Gewindebohrung versehen ist, in die eine Schraube (81) eingreift, die in Drehung von einem Motor (82) angetrieben wird und zwei Teile umfasst, die mit gegenläufigen Gewinden versehen sind, die gleiche und entgegen gesetzte Bewegungen der beiden Curser (80a, 80b) bestimmen.
EP01400041A 2000-01-10 2001-01-09 Verfahren und Vorrichtung zur thermischen Regelung des Walzenprofils in einem Walzwerk Expired - Lifetime EP1118395B1 (de)

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ES2241756T3 (es) 2005-11-01
FR2803548B1 (fr) 2002-04-19
DE60111875T2 (de) 2006-05-24
FR2803548A1 (fr) 2001-07-13
EP1118395A1 (de) 2001-07-25
CN1308998A (zh) 2001-08-22
CN1247334C (zh) 2006-03-29
US20010007200A1 (en) 2001-07-12
US6490903B2 (en) 2002-12-10
DE60111875D1 (de) 2005-08-18
ATE299404T1 (de) 2005-07-15

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