EP3024602A1 - Rolling mill provided with at least one cooling nozzle - Google Patents

Rolling mill provided with at least one cooling nozzle

Info

Publication number
EP3024602A1
EP3024602A1 EP14790138.3A EP14790138A EP3024602A1 EP 3024602 A1 EP3024602 A1 EP 3024602A1 EP 14790138 A EP14790138 A EP 14790138A EP 3024602 A1 EP3024602 A1 EP 3024602A1
Authority
EP
European Patent Office
Prior art keywords
support
cylinder
rolling mill
working
support arm
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.)
Granted
Application number
EP14790138.3A
Other languages
German (de)
French (fr)
Other versions
EP3024602B1 (en
Inventor
Conrad ERNST DE LA GRAETE
Bernard Roggo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fives DMS SA
Original Assignee
Fives DMS SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fives DMS SA filed Critical Fives DMS SA
Publication of EP3024602A1 publication Critical patent/EP3024602A1/en
Application granted granted Critical
Publication of EP3024602B1 publication Critical patent/EP3024602B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/145—Lateral support devices for rolls acting mainly in a direction parallel to the movement of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/06—Cassettes
    • 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
    • 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
    • B21B45/0239—Lubricating
    • B21B45/0245—Lubricating devices
    • B21B45/0248—Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251—Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the invention relates to a rolling mill, and more particularly relates to the appearance of the cooling and / or lubrication of the rolls of such a rolling mill.
  • the field of the invention is more particularly that of Sexto cage mills supported laterally, and in particular the rolling mills known under the name "Z High”.
  • mills find their application online, for example, in stripping annealing lines or, offline, as reversible mills, for metal strip.
  • a Quarto cage mill comprises a holding cage in which are provided four cylinders with parallel axes, namely respectively two working rolls, lower and upper, defining the gap of passage of the strip to be rolled, and two rolls of support, upper and lower, respectively bearing on the working cylinders on the opposite side to that of the air gap passage.
  • a Sexto mill comprises two additional cylinders with respect to a Quarto, namely two intermediate cylinders interposed respectively between each working roll and the corresponding support roll.
  • each support cylinder and each intermediate cylinder is rotatably mounted at its ends on chocks, by means of bearings, for example bearings or hydrostatic bearings.
  • bearings for example bearings or hydrostatic bearings.
  • These chocks are supports that can be moved in a direction parallel to the clamping plane, between the two amounts of the cage.
  • balancing cylinders allow the displacement of the chocks of the intermediate rolls. These balancing cylinders allow to change the relative position of the chocks and their cylinder, allowing among other things, to open the cage to facilitate the engagement of the product to be rolled, or to move these elements to facilitate disassembly of the cylinders. These balancing cylinders can also help to arch the intermediate cylinders.
  • Sexto cage mill An advantage of a Sexto cage mill is the ability to use smaller diameter work rolls compared to a Quarto cage, resulting in a greater reduction in the thickness of the product to be rolled. the same rolling force.
  • a Sexto mill also offers the possibility of axially shifting the two intermediate cylinders, and for the purpose of applying the rolling force only over the width of the strip to be rolled, and not over the entire length of the working rolls.
  • laterally supported In a Sexto mill called “laterally supported”, often, the working rolls are not mounted on chocks, but instead provided floating. It is then necessary to maintain their axial position, by means of axial stops, but also to maintain their lateral position by means of lateral support members, such as rollers or lateral support rollers arranged on either side. else of the clamping plane.
  • document EP 0121 811 in particular the embodiment of FIG. 2, discloses such a rolling mill of the Sexto type which comprises two working rolls, two support rolls and two intermediate rolls interposed respectively between one of the work rolls and the corresponding support roll.
  • the work rolls, the intermediate rolls and the support rollers are all mounted on chocks.
  • Each working roll is supported laterally, on both sides of the working roll, by two pairs of rollers.
  • the rollers of the same pair are provided at the two ends of each work roll, at the ends of the cylinder which are not in contact with the strip to be rolled.
  • the rollers are pivotally mounted on forks movable in translation relative to the amount of the cage, under the action of hydraulic cylinders.
  • nozzles on the support portion of the rollers, movable relative to the amount of the cage.
  • hoses are used to supply the nozzles with cooling and / or lubrication products, the hoses making it possible to take account of displacements between the mobile support part and the amounts of the cage.
  • These nozzles allow the lubrication and cooling of the rollers and the working roll, at the level of the support zone of the rollers.
  • No. 4,531,394 discloses another rolling mill design of the Sexto type supported laterally.
  • Such a mill always comprises two working rolls, two support rolls and two intermediate rolls interposed respectively between one of the work rolls and the corresponding support roll.
  • the support cylinders and the intermediate cylinders are mounted at their ends on chocks, while the working rolls are provided floating.
  • Each working cylinder is supported laterally, on each side of the work roll, by a lateral support cylinder, itself bearing on two series of rollers arranged along the length of the cylinder
  • each work roll the two corresponding lateral support rollers are integral with the two chocks of said intermediate roll.
  • Each lateral support cylinder and its support rollers are mounted on a support arm which extends between the two chocks of the intermediate cylinder, each support arm being pivotally mounted around a shaft whose ends are integral with the chocks. .
  • Each force distribution beam extend rigidly between the two uprights of the cage, respectively, vis-à-vis each support arm.
  • Each force distribution beam supports a beam, said preload, movable in translation relative to the corresponding force distribution beam, movable towards the interior of the cage in a substantially horizontal direction.
  • Precharge cylinders make it possible to constrain the movable beam in contact with the pivoting support arm in order to precharge the lateral support cylinder on the working cylinder.
  • the cooling and lubrication of the working roll and the intermediate roll are carried out by means of nozzles, respectively marked 73 and 72 in FIG. 2 of US Pat. No. 4,531,394, physically remote from the work roll, located outside "insert” or "cassette".
  • these nozzles are secured to the force distribution beam or to the mobile precharge beam. So that the jet can reach the intermediate cylinder, the nozzles, marked 72 are opposite bores through the support arms. In practice and to the knowledge of the inventors, this solution of watering through bores of the support arms would not seem to be retained in the rolling mills implemented industrially.
  • the spray nozzles, identified 73 are unable to properly cool the working roller because they are located too far from it, their jets coming too quickly in interference with the lateral support arms, rollers and rollers. side supports and therefore unable to trace the scroll of the band.
  • the marked nozzles 72 are unable to properly lubricate the contact between the working roller and the intermediate cylinder because they are located too far from it. In use, such insert mills have a limited life for the work roll, due to poor cooling.
  • the chocks of the intermediate rolls are mounted on bending blocks.
  • the cylinders of the bending blocks allow, during operation, to bring the intermediate cylinders, in a working position illustrated in Figure 5 of this document, or to move the intermediate cylinders to a position, illustrated in FIG. 4, allowing the withdrawal of the inserts by sliding.
  • These cylinders can also, in operation to arch the intermediate cylinder.
  • Connecting / disconnecting devices allow, in the working position of the cylinders, to connect the lubricant source to lubrication bores provided in the chocks, and to automatically disconnect the bores when the intermediate cylinders and their chocks are spaced vertically by the blocks of cambrages.
  • This automatic connection / disconnection is advantageous. No additional operation to connect / disconnect the lubricant source is required during maintenance, especially when the inserts are to be removed or inserted into the cage.
  • each connection device comprises an element, identified 57 called “plunger”, hollow, intended to drive the lubricant, and which allows, in the working position of the intermediate cylinders, as illustrated in FIG. 9, to seal in a relatively tight manner the bore of the chocker by through a joint.
  • This element is movable, vertically in translation, forced towards its sealing position by means of a spring, marked 58.
  • the lubricant flows from the lubricant source through the element. mobile and up to the bore of the insert.
  • the lubricant then flows from the bore of the chock, and up to the bearings through the hollow of the shaft, identified 17, on which the support arm is pivotally mounted.
  • connection / disconnection device allows the lubrication of the bearings of the support arms.
  • this document does not address the problem of cooling the work rolls. To the inventors' knowledge, still today the cooling of the intermediate and working rolls and the lubrication of the intermediate roll / work roll contact in a reversible "insert" mill is always carried out by providing nozzles physically remote from the rolls.
  • the rolling mill is now a unidirectional mill (non-reversible) which comprises, upstream, in the direction of travel of the web, a lateral support cylinder, as previously described, supported by a support arm. Downstream, the support arm is devoid of roller or support cylinder. This support cylinder is replaced by a pad called "support pad” which may be bronze or a graphite material self-supporting. lubricant, intended to slide on the surface of the working roller, without exerting a substantial effort on it.
  • This pad support arm has several nozzles for a coolant that can directly cool the working roller on the downstream side. Downstream, the lubricant liquid is supplied to the nozzles via the hollow shaft of the corresponding support arm. Upstream, the hollow shaft of the support arm is used to route the lubricant to the roller bearings supporting the lateral support cylinder.
  • This document teaches how to improve the cooling of work rolls. However, this improvement is to the detriment of the support of the working cylinder on one of its sides, removing a lateral support cylinder and replacing it with a pad, the mill then no longer a reversible mill.
  • Document WO 2010/086514 discloses a method and a device for watering a rolling installation. This document is more particularly concerned with the watering of the working cylinders each laterally supported by a pair of rolls, and comprising at least one pair of support rollers for transmitting a rolling force. This document is intended in particular as an improvement of the previously described document EP 1 721 685, a solution which would remain prohibited to reversible mills.
  • the nozzles are positioned on the supports of the lateral support cylinders in order to directly water the working cylinder on both sides, laterally.
  • WO 2010/0865514 is not a "cassette” technology as taught by US Pat. No. 4,531,394, US Pat. No. 6,041,636, EP 1,721,685 for which the intermediate cylinder assembly, chocks of the intermediate cylinder, support arm, (right and left), rollers and lateral support cylinders, right and left, form a self-supporting assembly, called “insert" which can be introduced into the cage or removed from the cage during the maintenance, by sliding the assembly according to the direction of the cylinders.
  • the real difficulty in improving the watering of working cylinders and intermediate cylinders in a cassette mill is not placing the nozzles in the cassette, but to know how to supply lubricating fluid / cooling, and without increasing the maintenance time during removal operations or insertion of the cassette in the roll stand. For example, it is excluded to use hoses between the cassette and the roll stand to feed the nozzles, as these would need to be disassembled and reassembled during removal or insertion of the cassette, which considerably lengthen the time required for these maintenance operations.
  • the document US.6,041,636 discloses automatic connection devices allowing, in the working position of the cylinders, to connect the lubricant source to lubrication bores provided in the chocks, and to automatically disconnect the bores when the intermediate cylinders are spaced vertically by the camber blocks.
  • a device can be used only to supply lubricant, or only the roller bearings of the lateral support cylinder of a support arm, or only to supply fluid to the nozzles of a support arm. This is the reason why the support arm of the nozzles is devoid of lateral support cylinder in the document EP 1.721.685, the latter being replaced by a pad which does not require a bearing to be lubricated.
  • connection device in this anteriority is connected to the chocks which requires to route the fluid along a complex path through the hollow shaft and to the lower end of the support arm.
  • This fluid path, complex, from the chock to the support arm, through the hollow shaft generates losses, limiting flow rates.
  • the lubrication of the working cylinder is thus obtained, indirectly, in that the intermediate cylinder has been wet and that cylinder carries this lubrication during its rotation by half a turn, to the working cylinder. According to the findings of the inventors, this lubrication is insufficient, in particular for the cylinders placed under the band.
  • the object of the present invention is to provide a rolling mill to overcome the aforementioned drawbacks.
  • Another object of the present invention is to provide such a mill whose cooling / lubrication system does not complicate the mill maintenance operations, and in particular the withdrawal of the lateral support rolls.
  • Another object of the present invention is to provide such a mill whose cooling / lubrication system allows large fluid flow rates.
  • Another object of the present invention is to provide a rolling mill which allows efficient cooling of the working rolls, even when the working roll or the intermediate roll, are small diameters.
  • Another object of the present invention is to provide a rolling mill which allows efficient cooling of the working rolls, even when the mill is made to operate at high speed.
  • the invention relates to a rolling mill comprising:
  • a holding cage comprising two pairs of amounts spaced apart at the two ends of the cage, at least two posts of the same pair defining an access window, two work rolls, capable of gripping a strip to be rolled, two support rolls, and two intermediate rolls, the support rolls and the intermediate rollers being rotatably mounted at their ends on chocks,
  • each lateral support roll being carried by a support arm, pivotally mounted on an axis,
  • stress distribution beams extending between the corresponding uprights of each pair, and means for applying a preload force on each support arm intended to engage with one of the support arms at the level of a bearing surface, and comprising at least one preload jack integral with one of the force distribution beams,
  • one or more spray nozzles for a lubricating / cooling fluid are provided.
  • At least one of the nozzles is embedded on one of the support arms and wherein the fluid supply circuit of said at least one nozzle comprises a connection / disconnection device comprising:
  • conduit of the support arm intended to channel the fluid, having a feed opening opening on the bearing surface of the support arm intended to engage with the application means of a precharge force
  • a hollow part movable relative to the force distribution beam, displaceable with respect to said force distribution beam under the action of said means for applying a preload force, capable of making a tight connection with the supply opening on the support surface in a first connection position of the device, or on the contrary retract into a second disconnection position, away from the support surface.
  • the hollow part is displaceable in translation, in a substantially horizontal direction, under the action of said means for applying a precharge force, thanks to a support element slidably provided with respect to said force distribution beam; ball joint being provided between the hollow portion and said support member;
  • the hollow part comprises a contact surface intended to make a tight connection with the support surface of the support arm, as well as a hemispherical surface intended for cooperate with a complementary cavity of the support element, to form the ball joint;
  • the hemispherical surface is constrained to the complementary cavity by means of an elastic pipe having bellows, mounted in tension between the hollow portion and the support member;
  • the supply circuit may comprise a hose between the mobile support element and the lubricant / cooling product source.
  • each support arm of a lateral support cylinder is pivotally mounted on said axis, constituted by a shaft integral with the chocks of one of the intermediate cylinders, each intermediate cylinder, chocks of the intermediate cylinder, cylinders of lateral support and corresponding support arms forming a self-supporting assembly, called insert, which can be removed or grouted through the access window during maintenance.
  • each lateral support cylinder can be supported by support rollers, the support rollers being mounted on the axes of the support arms by means of bearings, and in which the support arm comprises a support circuit.
  • fluid supply for the lubrication of the bearings separate from the supply circuit of said at least one nozzle.
  • the feed circuit for the lubrication of the bearings may comprise the shaft on which is mounted pivoting the support arm, said shaft being hollow, as known from the state of the art.
  • said at least one nozzle is directed in such a way that the jet is directed directly on the metal strip to be rolled and in such a way that the jet slides on the strip to be rolled up to the working roll.
  • said at least one nozzle is directed in such a way that the jet is directed on the intermediate cylinder, close to the contact zone between the working roll and the intermediate roll, and in such a way that driven by the intermediate cylinder, the jet fluid reaches the working cylinder.
  • the invention also relates to a method of cooling a rolling mill in which the working roll is sprayed with at least one nozzle, the jet of the nozzle being sufficiently powerful to reach said working roll by sliding on the strip to be rolled, against the current of the direction of travel of the strip to be rolled.
  • FIG. 1 is a partial view of a rolling mill according to the invention illustrating the upper part of the rolling mill, and more particularly the support roll, the intermediate roll and the working roll, the lateral support rolls, as well as their support arm.
  • FIG. 2 is a partial view, in detail, illustrating a connection / disconnection device in said first connection position of the device
  • FIG. 3 is a perspective view of the holding cage, and more particularly the possibility of adjustment between the force distribution beam relative to the amounts of the cage.
  • a rolling mill 1 comprising:
  • a holding cage 30 comprising two pairs of uprights 31 spaced apart from each other at the two ends of the cage, at least two uprights of the same pair defining an access window,
  • two working rolls 2 capable of gripping a strip to be rolled
  • two support rolls 4 and two intermediate rolls 3 the support rollers 4 and the intermediate rollers 3 being rotatably mounted at their ends on chocks
  • each lateral support roll being carried by a support arm 6, pivotally mounted on an axis 7,
  • stress distribution beams 8 extending between the corresponding uprights of each pair, and means 9 for applying a preload force to each support arm 6, intended to engage with one of the support arms at level of a bearing surface 10, and comprising at least one preloading jack 11 secured to one of the force distribution beams 8,
  • one or more spray nozzles for a lubricating / cooling fluid are provided.
  • the working cylinders 2, the intermediate cylinders 3 and the support rollers 4 are substantially parallel axes, the axes of the cylinders 2,3,4 being contained in a clamping plane substantially perpendicular to the strip to be rolled B. Both 2 working cylinders are located on either side of the strip to be rolled, their spacing defining the working air gap.
  • Each intermediate cylinder 3 is interposed between the working cylinder 2 and the corresponding support cylinder 4. The working roll rotated indirectly by rotating the intermediate roll 3.
  • the lateral support rollers 5 are preferably two in number per work roll 2 and serve to hold the work roll 2 laterally on both sides of the clamping plane. It is thus preferably a reversible mill.
  • Each lateral support cylinder 5 is mounted on a support arm 6 pivotally mounted on an axis 7.
  • each support arm 6 can be pivotally mounted on a shaft integral at its ends with the chocks of the intermediate cylinders, such that taught by US 4,531,394 or US 6,041,636.
  • each intermediate roll 3, chocks of the intermediate roll, lateral support rolls 5 and corresponding support arms 6 form a self-supporting assembly, commonly called “insert” or “cassette", which can be removed or slidably introduced.
  • each support arm 6 can be pivotally mounted on bending blocks, able to be moved vertically relative to the amounts of the cage.
  • the force distribution beams 8 extend between the corresponding amounts of each pair, respectively vis-à-vis each support arm, at least during operation.
  • the means 9 for applying a preload force on each support arm 6 are intended to engage with one of the support arms at a bearing surface 10, and comprise at least one integral preload jack 11 of one of the force distribution beams 8. The position of the force distribution beam 8 can be adjusted horizontally relative to the uprights 31.
  • synchronized screw / nut 81 actuators can be provided, to bring closer the force distribution beam towards the support arm 6, or on the contrary move the force distribution beam 8 away from said support arm 6.
  • the working cylinder is generally forced to press the lateral support cylinder 5 into position. upstream, in the direction of travel of the band B.
  • the force distribution beam 8, downstream is positioned a few millimeters from the support arm 6, downstream.
  • Means 9 for applying a preload force are then used to catch the game and ensure contact of the lateral support cylinder 5, downstream.
  • the rolling mill comprises the one or more spray nozzles for a lubricating / cooling fluid, these nozzles being in particular intended to cool / lubricate the working rolls, directly or indirectly and / or the other rolls of the rolling mill.
  • At least one of the nozzles 12, 12 ' is embedded on one of the support arms 6, in particular to allow the lubrication / cooling of the working rolls and / or the intermediate rolls.
  • the fluid supply circuit of said at least one nozzle 12, 12 ' comprises a connection / disconnection device 13 comprising:
  • this hollow portion 16 is able to make a tight connection with the feed opening 15 on the bearing surface 10 in a first connection position, or on the contrary, retract into a second position of disconnection, away from the support surface 10.
  • the cooling fluid can be channeled from the source to the said at least one marked nozzle 12 (illustrated) or to the said at least one marked nozzle. 12 '(not shown), via said connection / disconnection device.
  • the means 9 for applying a precharge force are retracted, in the retracted position, said hollow partite 16 being at a distance from the support arm 6.
  • This position makes it possible, in particular when the The mill design is of the insert type (or cassette) to be able to remove or insert the insert, without requiring additional maintenance time to disconnect / connect the source of fluid.
  • connection / disconnection device connects directly to the support arm, and not to the chocks of the intermediate cylinder. as taught in the prior art known from US.6, 041,636.
  • the fluid does not need to pass through the hollow shaft on which the support arm is pivotally mounted. It is then possible to obtain fluid flow rates much higher than those obtained in this state of the art.
  • the hollow of the shaft may possibly be used, as in the state of the art, for channeling a fluid intended to lubricate the bearings of the rollers 52 laterally supporting the lateral support cylinder 5.
  • each lateral support cylinder 5 is supported by rollers 52, the rollers 52 being mounted on parallel axes 50, 51, of the support arm 6 by means of bearings.
  • the support arm 6 comprises a lubricant supply circuit for the bearings, distinct from the supply circuit of said at least one nozzle 12, 12 '.
  • the lubricant supply circuit for the bearings may comprise the shaft on which is pivotally mounted the support arm 6, said shaft being hollow, traversed at least in part by the lubricant.
  • the hollow portion 16 is displaceable in translation, in a substantially horizontal direction, under the action of said means for applying a preload force, thanks to a support element 17 slidable relative to said force distribution beam 8.
  • This support member 17 can slide at a bore of the force distribution beam, under the action of the cylinder 11 which can be double effect.
  • the support member 17 and the hollow portion 16 move together in the direction of the support arm 6.
  • the support member 17 and the hollow portion 16 move away from the support arm 17.
  • a ball joint can be provided between the hollow portion 16 and said support member 17. This ball joint makes it possible to ensure that the contact surface 18 of the hollow portion 16 is inclined along the plane of the bearing surface 10 of the support arm 6 in said connection position.
  • the ball joint comprises a hemispherical surface 19 of the hollow portion intended to cooperate with a complementary shaped cavity 20 of the support member 17.
  • the hemispherical surface 19 is constrained towards the complementary cavity 20 by means of an elastic duct 21 having bellows 22, mounted in tension between the hollow portion 16 and the support element 17.
  • This elastic duct 17 allows maintaining the hollow portion 16 on the support member 17.
  • the bellows of the elastic pipe 21 provide a necessary elasticity so that the hollow portion 16 can pivot in the cavity 20, in a ball joint connection.
  • the supply circuit may include a hose 23 between the movable support member 17 and the lubricant / coolant source.
  • the fluid arrives from the source, passes through the hose 23 to a bore of the support member 17, then flows into the elastic pipe 21, through the hollow portion 16 until it reaches the feed opening 15. From this opening, the fluid flows in the support arm 6 through the pipe 14 to the at least one nozzle 12 which can be secured to the support rollers 52, or said at least one nozzle 12 'which can be integral directly on the body of the support arm 6.
  • a plurality of nozzles 12 and / or 12 ' may be arranged along the length of the support arm 6 so as to be able to cool the working roll and / or the intermediate roll over its entire length.
  • said at least one nozzle 12 can be directed in such a way that the jet is directed directly on the strip to be rolled, and not directly on the working roll, and in such a way that the jet slides on the strip to be rolled. work roll direction 2.
  • Such orientation of the nozzles 12 advantageously allows to effectively cool the working cylinder when the working cylinder and the intermediate cylinder are small diameters and prohibit directly spraying the working cylinder.
  • This orientation of the at least one nozzle 12 makes it possible to cool the working roll, even when the jet is sprayed against the current of the direction of travel of the strip to be rolled, as illustrated in FIG. 2.
  • said at least one nozzle 12, supported by the pivoting arm 6 is located near the working cylinder, and in that the invention allows to obtain significant fluid flow. This proximity and such flow rates allow the jet to slide on the web against the running direction of the tape until it reaches the working cylinder.
  • said at least one nozzle 12 ' can be directed in such a way that the jet is directed on the intermediate cylinder 3, close to the contact zone Z between the working roll 2 and the intermediate roll 3, and such that, driven by the intermediate cylinder, the jet fluid reaches the working cylinder 2.
  • the invention thus makes it possible to place one or more nozzles 12 'on the support arms 6, close to this zone Z, and thus to water the intermediate cylinder 3, as close as possible to this zone, and not only of the bearing cylinder contact zone 4 / intermediate cylinder 3, as known in the state of the art.
  • the intermediate cylinder 3 is rotated at high speed, most of the jet fluid reaches the working cylinder 2, whatever the action of the centrifugal force.
  • Such nozzles 12, 12 ' may be provided on all or part of the two support arms of the upper lateral support cylinders and on all or part of the two support arms of the lower lateral support cylinders.
  • the nozzles 12, 12 ' are provided on the four support arms, a connection / disconnection device being provided between each support arm and the corresponding force distribution beam.
  • the invention makes it possible to cool / lubricate:
  • Support Arm (Lateral Support Cylinder 5),
  • Support surface (support arm 6),
  • Spray nozzles (on intermediate roll),

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Rolling Contact Bearings (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

The invention relates to a rolling mill (1) including: bearing side cylinders (5) capable of supporting the working cylinders (2) of the rolling mill at the sides, each bearing side cylinder being supported by a supporting arm (6) pivotably mounted on a shaft (7); beams (8) for distributing stress, extending between the corresponding posts of each pair, and means (9) for applying preload stress on each supporting arm (6), which are to be inserted, with one of the supporting arms, at a bearing surface (10) and including at least one preload cylinder (11) secured to one of the beams (8) for distributing stress; and one or more spraying nozzles for a lubricating/cooling fluid. According to the invention, at least one of the nozzles (12, 12') is built onto one of the supporting arms (6). In said supporting arm, the fluid supply circuit of said at least one nozzle (12, 12') includes a device (13) for connecting with or disconnecting from the supporting arm (6).

Description

LAMINOIR EQUIPE D'AU MOINS UNE BUSE DE REFROIDISSEMENT  ROLLER EQUIPPED WITH AT LEAST ONE COOLING NOZZLE
L'invention est relative à un laminoir, et concerne plus particulièrement l'aspect du refroidissement et/ou de la lubrification des cylindres d'un tel laminoir. The invention relates to a rolling mill, and more particularly relates to the appearance of the cooling and / or lubrication of the rolls of such a rolling mill.
Le domaine de l'invention est plus particulièrement celui des laminoirs à cage Sexto supporté latéralement, et en particulier les laminoirs connus sous l'appellation « Z High ». The field of the invention is more particularly that of Sexto cage mills supported laterally, and in particular the rolling mills known under the name "Z High".
Ces laminoirs trouvent leur application, en ligne, par exemple, dans les lignes de recuit décapage ou, hors ligne, comme laminoirs réversibles, pour bande métallique.  These mills find their application online, for example, in stripping annealing lines or, offline, as reversible mills, for metal strip.
Un laminoir à cage Quarto comprend une cage de maintien dans laquelle sont prévus quatre cylindres à axes parallèles, à savoir respectivement deux cylindres de travail, inférieur et supérieur, définissant l'entrefer de passage de la bande à laminer, ainsi que deux cylindres d'appui, supérieur et inférieur, prenant respectivement appui sur les cylindres de travail du coté opposé à celui de l'entrefer de passage.  A Quarto cage mill comprises a holding cage in which are provided four cylinders with parallel axes, namely respectively two working rolls, lower and upper, defining the gap of passage of the strip to be rolled, and two rolls of support, upper and lower, respectively bearing on the working cylinders on the opposite side to that of the air gap passage.
Un laminoir Sexto comprend deux cylindres supplémentaires par rapport à un Quarto, à savoir deux cylindres intermédiaires interposés respectivement entre chaque cylindre de travail et le cylindre d'appui correspondant.  A Sexto mill comprises two additional cylinders with respect to a Quarto, namely two intermediate cylinders interposed respectively between each working roll and the corresponding support roll.
Dans de tels laminoirs, chaque cylindre d'appui et chaque cylindre intermédiaire, est monté rotatif à ses extrémités sur des empoises, par l'intermédiaire de paliers, par exemple à roulements ou encore paliers hydrostatiques. Ces empoises sont des supports qui peuvent être déplacés selon une direction parallèle au plan de serrage, entre les deux montants de la cage.  In such rolling mills, each support cylinder and each intermediate cylinder, is rotatably mounted at its ends on chocks, by means of bearings, for example bearings or hydrostatic bearings. These chocks are supports that can be moved in a direction parallel to the clamping plane, between the two amounts of the cage.
Classiquement, des vérins d'équilibrage permettent le déplacement des empoises des cylindres intermédiaires. Ces vérins d'équilibrage permettent de changer la position relative des empoises et de leur cylindre, permettant entre autre, d'ouvrir la cage pour faciliter l'engagement du produit à laminer, ou encore de déplacer ces éléments pour faciliter le démontage des cylindres. Ces vérins d'équilibrage peuvent également permettre de cambrer les cylindres intermédiaires.  Conventionally, balancing cylinders allow the displacement of the chocks of the intermediate rolls. These balancing cylinders allow to change the relative position of the chocks and their cylinder, allowing among other things, to open the cage to facilitate the engagement of the product to be rolled, or to move these elements to facilitate disassembly of the cylinders. These balancing cylinders can also help to arch the intermediate cylinders.
Un avantage d'un laminoir à cage Sexto est la possibilité d'utiliser, par comparaison avec une cage Quarto, des cylindres de travail de plus petit diamètre, ce qui permet d'obtenir une réduction d'épaisseur supérieure du produit à laminer, pour une même force de laminage. Un laminoir Sexto offre par ailleurs la possibilité de décaler axialement les deux cylindres intermédiaires, et dans le but d'appliquer l'effort de laminage seulement sur la largeur de la bande à laminer, et non sur toute la longueur des cylindres de travail. An advantage of a Sexto cage mill is the ability to use smaller diameter work rolls compared to a Quarto cage, resulting in a greater reduction in the thickness of the product to be rolled. the same rolling force. A Sexto mill also offers the possibility of axially shifting the two intermediate cylinders, and for the purpose of applying the rolling force only over the width of the strip to be rolled, and not over the entire length of the working rolls.
Dans un laminoir Sexto dit « supporté latéralement », bien souvent, les cylindres de travail ne sont pas montés sur empoises, mais au contraire prévus flottants. Il est alors nécessaire de maintenir leur position axiale, par l'intermédiaire de butées axiales, mais également de maintenir leur position latérale au moyen d'organes d'appui latéraux, tels que des galets ou des rouleaux d'appui latéraux disposés de part et d'autre du plan de serrage. In a Sexto mill called "laterally supported", often, the working rolls are not mounted on chocks, but instead provided floating. It is then necessary to maintain their axial position, by means of axial stops, but also to maintain their lateral position by means of lateral support members, such as rollers or lateral support rollers arranged on either side. else of the clamping plane.
On connaît, par exemple, du document EP 0121 811, en particulier du mode de réalisation de la figure 2, un tel laminoir du type Sexto qui comprend deux cylindres de travail, deux cylindres d'appui et deux cylindres intermédiaires, intercalés respectivement entre l'un des cylindres de travail et le cylindre d'appui correspondant. Dans ce document, les cylindres de travail, les cylindres intermédiaires et les cylindres d'appui sont tous montés sur empoises.  For example, document EP 0121 811, in particular the embodiment of FIG. 2, discloses such a rolling mill of the Sexto type which comprises two working rolls, two support rolls and two intermediate rolls interposed respectively between one of the work rolls and the corresponding support roll. In this document, the work rolls, the intermediate rolls and the support rollers are all mounted on chocks.
Chaque cylindre de travail est supporté latéralement, de part et d'autre du cylindre de travail, par deux paires de galets. Les galets d'une même paire sont prévus au niveau des deux extrémités de chaque cylindre de travail, au niveau des extrémités du cylindre qui ne sont pas en contact avec la bande à laminer. Les galets sont montés en pivot sur des fourches mobiles en translation par rapport au montant de la cage, sous l'action de vérins hydrauliques.  Each working roll is supported laterally, on both sides of the working roll, by two pairs of rollers. The rollers of the same pair are provided at the two ends of each work roll, at the ends of the cylinder which are not in contact with the strip to be rolled. The rollers are pivotally mounted on forks movable in translation relative to the amount of the cage, under the action of hydraulic cylinders.
A la figure 6 de ce document, il est prévu des buses embarquées sur la partie de support des galets, mobile par rapport au montant de la cage. A cet effet, on utilise des flexibles pour alimenter les buses en produits de refroidissement et/ou de lubrification, les flexibles permettant de tenir compte des déplacements entre la partie de support, mobile, et les montants de la cage. Ces buses permettent la lubrification et le refroidissement des galets et du cylindre de travail, au niveau de la zone d'appui des galets.  In Figure 6 of this document, there are provided onboard nozzles on the support portion of the rollers, movable relative to the amount of the cage. For this purpose, hoses are used to supply the nozzles with cooling and / or lubrication products, the hoses making it possible to take account of displacements between the mobile support part and the amounts of the cage. These nozzles allow the lubrication and cooling of the rollers and the working roll, at the level of the support zone of the rollers.
On connaît encore du document US 4.531.394 une autre conception de laminoir, du type Sexto supporté latéralement. Un tel laminoir comprend toujours deux cylindres de travail, deux cylindres d'appui et deux cylindres intermédiaires, intercalés respectivement entre l'un des cylindres de travail et le cylindre d'appui correspondant. Dans ce document, les cylindres d'appui et les cylindres intermédiaires sont montés à leurs extrémités sur des empoises, tandis que les cylindres de travail sont prévus flottants. Chaque cylindre de travail est supporté latéralement, de chaque côté du cylindre de travail, par un cylindre d'appui latéral, lui-même en appui sur deux séries de galets disposés sur la longueur du cylindre No. 4,531,394 discloses another rolling mill design of the Sexto type supported laterally. Such a mill always comprises two working rolls, two support rolls and two intermediate rolls interposed respectively between one of the work rolls and the corresponding support roll. In this document, the support cylinders and the intermediate cylinders are mounted at their ends on chocks, while the working rolls are provided floating. Each working cylinder is supported laterally, on each side of the work roll, by a lateral support cylinder, itself bearing on two series of rollers arranged along the length of the cylinder
Dans cette conception de laminoir, pour chaque cylindre de travail, les deux cylindres d'appui latéraux correspondants sont solidaires des deux empoises dudit cylindre intermédiaire. Chaque cylindre d'appui latéral, ainsi que ses galets d'appui sont montés sur un bras support qui s'étend entre les deux empoises du cylindre intermédiaire, chaque bras support étant monté pivotant autour d'un arbre dont les extrémités sont solidaires des empoises.  In this rolling mill design, for each work roll, the two corresponding lateral support rollers are integral with the two chocks of said intermediate roll. Each lateral support cylinder and its support rollers are mounted on a support arm which extends between the two chocks of the intermediate cylinder, each support arm being pivotally mounted around a shaft whose ends are integral with the chocks. .
L'ensemble cylindre intermédiaire, empoises du cylindre intermédiaire, bras support, (droite et gauche), galets et cylindres d'appui latéral, droite et gauche, forme un ensemble autoportant, couramment appelé « cassette » ou encore « insert» qui peut être introduit dans la cage, ou retiré de la cage, lors de la maintenance, par coulis sèment de l'ensemble selon la direction des cylindres.  The intermediate cylinder assembly, chocks of the intermediate cylinder, support arm, (right and left), rollers and lateral support cylinders, right and left, form a self-supporting assembly, commonly called "cassette" or "insert" which can be introduced into the cage, or removed from the cage during maintenance, by grouting the assembly in the direction of the cylinders.
Quatre poutres de répartition d'effort s'étendent de manière rigide entre les deux montants de la cage, respectivement, en vis-à-vis de chaque bras support. Chaque poutre de répartition d'effort supporte une poutre, dite de précharge, mobile en translation par rapport à la poutre de répartition d'effort correspondante, déplaçable vers l'intérieur de la cage selon une direction sensiblement horizontale. Des vérins de précharge permettent de contraindre la poutre mobile en contact avec le bras support pivotant pour précharger le cylindre d'appui latéral sur le cylindre de travail.  Four force distribution beams extend rigidly between the two uprights of the cage, respectively, vis-à-vis each support arm. Each force distribution beam supports a beam, said preload, movable in translation relative to the corresponding force distribution beam, movable towards the interior of the cage in a substantially horizontal direction. Precharge cylinders make it possible to constrain the movable beam in contact with the pivoting support arm in order to precharge the lateral support cylinder on the working cylinder.
Dans un tel laminoir, le refroidissement et la lubrification du cylindre de travail et du cylindre intermédiaire sont effectués au moyen de buses, repérées respectivement 73 et 72 à la figure 2 du document US 4.531.394, physiquement à distance du cylindre de travail, situées en dehors de « insert » ou de la « cassette ». Sur la figure 2, ces buses sont solidarisées à la poutre de répartition d'effort, ou encore, à la poutre de précharge mobile. Afin que le jet puisse atteindre le cylindre intermédiaire, les buses, repérées 72 sont en regard d'alésages traversant les bras support. En pratique et à la connaissance des inventeurs, cette solution d'arrosage par l'intermédiaire d'alésages des bras support ne semblerait pas être retenue dans les laminoirs mis en œuvre industriellement. Selon les constatations des inventeurs, les buses de pulvérisation, repérées 73 sont incapables de refroidir correctement le rouleau de travail car elles sont situées trop loin de celui-ci, leurs jets venant trop vite en interférence avec les bras supports latéraux, galets et rouleaux d'appuis latéraux et donc incapables de remonter le défilement de la bande. D'autre part, selon les constatations des inventeurs, les buses repérées 72 sont incapables de lubrifier correctement le contact entre le rouleau de travail et le cylindre intermédiaire car elles sont situées trop loin de celui-ci. A l'usage, de tels laminoirs à insert, présentent une durée de vie limitée pour le cylindre de travail, en raison de son mauvais refroidissement. In such a mill, the cooling and lubrication of the working roll and the intermediate roll are carried out by means of nozzles, respectively marked 73 and 72 in FIG. 2 of US Pat. No. 4,531,394, physically remote from the work roll, located outside "insert" or "cassette". In Figure 2, these nozzles are secured to the force distribution beam or to the mobile precharge beam. So that the jet can reach the intermediate cylinder, the nozzles, marked 72 are opposite bores through the support arms. In practice and to the knowledge of the inventors, this solution of watering through bores of the support arms would not seem to be retained in the rolling mills implemented industrially. According to the findings of the inventors, the spray nozzles, identified 73 are unable to properly cool the working roller because they are located too far from it, their jets coming too quickly in interference with the lateral support arms, rollers and rollers. side supports and therefore unable to trace the scroll of the band. On the other hand, according to the findings of the inventors, the marked nozzles 72 are unable to properly lubricate the contact between the working roller and the intermediate cylinder because they are located too far from it. In use, such insert mills have a limited life for the work roll, due to poor cooling.
On connaît encore du document US.6,041, 636 une autre conception d'un laminoir du type sexto supporté latéralement, à « insert » ou « cassette ». Comme dans le document précédent, l'ensemble cylindre intermédiaire, empoises du cylindre intermédiaire, bras support, (droite et gauche), galets et cylindres d'appui latéral, droite et gauche, forme un ensemble autoportant qui peut être introduit dans la cage ou retiré de la cage lors de la maintenance, par coulissement de l'ensemble selon la direction des cylindres.  Document US Pat. No. 6,041,636 discloses another design of a laterally supported sexto type mill with "insert" or "cassette". As in the previous document, the intermediate cylinder assembly, chocks of the intermediate cylinder, support arm, (right and left), rollers and lateral bearing cylinders, right and left, form a self-supporting assembly that can be introduced into the cage or removed from the cage during maintenance, by sliding the assembly in the direction of the cylinders.
Dans ce document US.6, 041,636, les empoises des cylindres intermédiaires sont montées sur des blocs de cambrage. Les vérins des blocs de cambrage permettent, lors du fonctionnement, de rapprocher les cylindres intermédiaires, dans une position de travail illustrée à la figure 5 de ce document, ou encore d'écarter les cylindres intermédiaires jusqu'à une position, illustrée à la figure 4, permettant le retrait des inserts par coulissement. Ces vérins peuvent permettre également, en fonctionnement de cambrer le cylindre intermédiaire. In this document US.6, 041,636, the chocks of the intermediate rolls are mounted on bending blocks. The cylinders of the bending blocks allow, during operation, to bring the intermediate cylinders, in a working position illustrated in Figure 5 of this document, or to move the intermediate cylinders to a position, illustrated in FIG. 4, allowing the withdrawal of the inserts by sliding. These cylinders can also, in operation to arch the intermediate cylinder.
Dans ce document, il est connu d'alimenter en lubrifiant les roulements des galets des bras support de l'insert, à partir d'une source de lubrifiant. Des dispositifs de connexion/déconnexion permettent, dans la position de travail des cylindres, de connecter la source de lubrifiant à des alésages de lubrification prévus dans les empoises, et de déconnecter automatiquement les alésages lorsque les cylindres intermédiaires et leurs empoises sont écartés verticalement par les blocs de cambrages. Cette connexion/déconnexion automatique est avantageuse. Aucune opération supplémentaire pour connecter/déconnecter la source de lubrifiant n'est nécessaire lors de la maintenance, en particulier lorsque les inserts doivent être retirés ou introduits dans la cage. A cet effet, chaque dispositif de connexion comprend un élément, repéré 57 nommé « plunger », creux, destiné à conduire le lubrifiant, et qui permet, dans la position de travail des cylindres intermédiaires, telle qu'illustrée à la figure 9, de joindre de manière relativement étanche l'alésage de l'empoise par l'intermédiaire d'un joint. Cet élément est mobile, verticalement en translation, contraint vers sa position d'étanchéité au moyen d'un ressort, repéré 58. Dans la position de connexion, le lubrifiant s'écoule à partir de la source de lubrifiant au travers de l'élément mobile et jusqu'à l'alésage de l'insert. Le lubrifiant s'écoule ensuite depuis l'alésage de l'empoise, et jusqu'aux roulements par l'intermédiaire du creux de l'arbre, repéré 17, sur lequel le bras support est monté pivotant. In this document, it is known to supply the bearings of the rollers of the support arms of the insert with lubricant from a source of lubricant. Connecting / disconnecting devices allow, in the working position of the cylinders, to connect the lubricant source to lubrication bores provided in the chocks, and to automatically disconnect the bores when the intermediate cylinders and their chocks are spaced vertically by the blocks of cambrages. This automatic connection / disconnection is advantageous. No additional operation to connect / disconnect the lubricant source is required during maintenance, especially when the inserts are to be removed or inserted into the cage. For this purpose, each connection device comprises an element, identified 57 called "plunger", hollow, intended to drive the lubricant, and which allows, in the working position of the intermediate cylinders, as illustrated in FIG. 9, to seal in a relatively tight manner the bore of the chocker by through a joint. This element is movable, vertically in translation, forced towards its sealing position by means of a spring, marked 58. In the connection position, the lubricant flows from the lubricant source through the element. mobile and up to the bore of the insert. The lubricant then flows from the bore of the chock, and up to the bearings through the hollow of the shaft, identified 17, on which the support arm is pivotally mounted.
Lorsque les cylindres intermédiaires sont écartés par les blocs de cambrage jusqu'à leur position de retrait, la course de l'élément mobile est limitée, inférieure à la course de déplacement des blocs de cambrage, permettant ainsi de garantir un inter-espace entre l'élément mobile et l'empoise, tel qu'illustré à la figure 8 du document US 6,041,636. Il est alors possible de retirer l'insert, sans frottement entre les empoises et l'élément mobile.  When the intermediate rolls are moved apart by the bending blocks to their retracted position, the travel of the movable element is limited to less than the displacement stroke of the bending blocks, thus ensuring an inter-space between the bending blocks. movable element and the chock, as shown in Figure 8 of US 6,041,636. It is then possible to remove the insert, without friction between the chocks and the movable element.
Un tel dispositif de connexion/déconnexion permet la lubrification des roulements des bras supports. Toutefois ce document n'aborde pas le problème du refroidissement des cylindres de travail. A la connaissance des inventeurs, encore aujourd'hui le refroidissement des cylindres intermédiaires et de travail et la lubrification du contact cylindre intermédiaire/cylindre de travail dans un laminoir réversible à « inserts » est toujours effectué en prévoyant des buses physiquement à distance des cylindres.  Such a connection / disconnection device allows the lubrication of the bearings of the support arms. However, this document does not address the problem of cooling the work rolls. To the inventors' knowledge, still today the cooling of the intermediate and working rolls and the lubrication of the intermediate roll / work roll contact in a reversible "insert" mill is always carried out by providing nozzles physically remote from the rolls.
On connaît toutefois du document EP 1.721.685 un laminoir du type sexto latéralement, perfectionnant le refroidissement d'un cylindre de travail. Ce document se propose d'améliorer les laminoirs de l'état de la technique à « cassettes », pour lesquels il n'y aurait pas de place pour placer des buses de refroidissement au plus près des rouleaux. La figure 2 illustre l'objet du perfectionnement de l'antériorité EP 1 721 685. Document EP 1.721.685, however, discloses a sexto type mill laterally, improving the cooling of a working cylinder. This document proposes to improve the rolling mills of the state of the art "cassettes", for which there would be no place to place cooling nozzles closer to the rollers. FIG. 2 illustrates the object of the improvement of the prior art EP 1 721 685.
Le laminoir est désormais un laminoir unidirectionnel (non réversible) qui comprend, en amont, selon le sens de défilement de la bande, un cylindre d'appui latéral, tel que précédemment décrit, supporté par un bras support. En aval, le bras support est dépourvu de galet ou de cylindre d'appui. Ce cylindre d'appui est remplacé par un patin dénommé « support pad » qui peut être en bronze ou en un matériau en graphite auto- lubrifiant, destiné à glisser sur la surface du rouleau de travail, sans exercer d'effort substantiel sur celui-ci. The rolling mill is now a unidirectional mill (non-reversible) which comprises, upstream, in the direction of travel of the web, a lateral support cylinder, as previously described, supported by a support arm. Downstream, the support arm is devoid of roller or support cylinder. This support cylinder is replaced by a pad called "support pad" which may be bronze or a graphite material self-supporting. lubricant, intended to slide on the surface of the working roller, without exerting a substantial effort on it.
Ce bras support à patin embarque plusieurs buses pour un liquide de refroidissement qui permettent de refroidir directement le rouleau de travail, du côté aval. En aval, le liquide de lubrifiant est alimenté jusqu'aux buses par l'intermédiaire de l'arbre creux du bras support correspondant. En amont, l'arbre creux du bras support est utilisé pour acheminer le lubrifiant jusqu'aux roulements des galets supportant le cylindre d'appui latéral. Ce document enseigne ainsi comment améliorer le refroidissement des cylindres de travail. Toutefois cette amélioration se fait au détriment du supportage du cylindre de travail sur l'un de ses côtés, en supprimant un cylindre d'appui latéral et en le remplaçant par un patin, le laminoir n'étant alors plus un laminoir réversible.  This pad support arm has several nozzles for a coolant that can directly cool the working roller on the downstream side. Downstream, the lubricant liquid is supplied to the nozzles via the hollow shaft of the corresponding support arm. Upstream, the hollow shaft of the support arm is used to route the lubricant to the roller bearings supporting the lateral support cylinder. This document teaches how to improve the cooling of work rolls. However, this improvement is to the detriment of the support of the working cylinder on one of its sides, removing a lateral support cylinder and replacing it with a pad, the mill then no longer a reversible mill.
On connaît encore du document WO 2010/086514 une méthode et un dispositif d'arrosage d'une installation de laminage. Ce document s'intéresse plus particulièrement à l'arrosage des cylindres de travail supportés latéralement chacun par une paire de cylindres, et comprenant au moins une paire de cylindres d'appui pour la transmission d'un effort de laminage. Ce document se veut notamment comme une amélioration du document précédemment décrit EP 1 721 685, solution qui resterait interdite aux laminoirs réversibles. Document WO 2010/086514 discloses a method and a device for watering a rolling installation. This document is more particularly concerned with the watering of the working cylinders each laterally supported by a pair of rolls, and comprising at least one pair of support rollers for transmitting a rolling force. This document is intended in particular as an improvement of the previously described document EP 1 721 685, a solution which would remain prohibited to reversible mills.
Selon ce document, on prévoit une aspersion directe d'au moins une partie des cylindres de travail, de part et d'autre dudit plan perpendiculaire à la direction de défilement de la bande.  According to this document, there is provided a direct spray of at least a portion of the working rolls, on either side of said plane perpendicular to the running direction of the strip.
Selon ce document, les buses sont positionnées sur les supports des cylindres d'appui latéraux afin d'arroser directement le cylindre de travail des deux côtés, latéralement. Toutefois, la technologie décrite dans ce document WO 2010/0865514 n'est pas une technologie à « cassettes » comme enseignée par les documents US 4.531.394, US.6, 041,636, EP 1.721.685 pour laquelle l'ensemble cylindre intermédiaire, empoises du cylindre intermédiaire, bras support, (droite et gauche), galets et cylindres d'appui latéral, droite et gauche, forme un ensemble autoportant, appelé « insert » qui peut être introduit dans la cage ou retiré de la cage lors de la maintenance, par coulissement de l'ensemble selon la direction des cylindres.  According to this document, the nozzles are positioned on the supports of the lateral support cylinders in order to directly water the working cylinder on both sides, laterally. However, the technology described in this document WO 2010/0865514 is not a "cassette" technology as taught by US Pat. No. 4,531,394, US Pat. No. 6,041,636, EP 1,721,685 for which the intermediate cylinder assembly, chocks of the intermediate cylinder, support arm, (right and left), rollers and lateral support cylinders, right and left, form a self-supporting assembly, called "insert" which can be introduced into the cage or removed from the cage during the maintenance, by sliding the assembly according to the direction of the cylinders.
La réelle difficulté de l'amélioration de l'arrosage des cylindres de travail et des cylindres intermédiaires dans un laminoir à cassettes n'est pas de placer les buses d'arrosage dans la cassette, mais de savoir comment les alimenter en fluide de lubrification/refroidissement, et sans augmenter la durée de maintenance lors des opérations de retrait ou d'insertion de la cassette dans la cage du laminoir. Par exemple, il est exclu d'utiliser des flexibles entre la cassette et la cage du laminoir pour alimenter les buses, car ceux-ci nécessiteraient d'être démontés et remontés lors des opérations de retrait ou d'introduction de la cassette, ce qui allongerait considérablement le temps nécessaire pour ces opérations de maintenance. The real difficulty in improving the watering of working cylinders and intermediate cylinders in a cassette mill is not placing the nozzles in the cassette, but to know how to supply lubricating fluid / cooling, and without increasing the maintenance time during removal operations or insertion of the cassette in the roll stand. For example, it is excluded to use hoses between the cassette and the roll stand to feed the nozzles, as these would need to be disassembled and reassembled during removal or insertion of the cassette, which considerably lengthen the time required for these maintenance operations.
En outre, et selon les constatations de l'inventeur, placer les buses sur le support du cylindre d'appui latéral afin d'arroser directement le cylindre de travail n'est pas toujours possible, en particulier lorsque le cylindre de travail et le cylindre intermédiaire sont de petit diamètre.  In addition, and according to the findings of the inventor, placing the nozzles on the support of the lateral support cylinder to directly water the working cylinder is not always possible, especially when the working cylinder and the cylinder intermediate are small diameter.
Comme précédemment décrit, le document US.6,041, 636 divulgue des dispositifs de connexion automatique permettant, dans la position de travail des cylindres, de connecter la source de lubrifiant à des alésages de lubrification prévus dans les empoises, et de déconnecter automatiquement les alésages lorsque les cylindres intermédiaires sont écartés verticalement par les blocs de cambrages. Toutefois, un tel dispositif ne peut être utilisé que pour alimenter en lubrifiant, soit uniquement les roulements des galets du cylindre d'appui latéral d'un bras support, soit uniquement pour alimenter en fluide les buses d'un bras support. C'est la raison pour laquelle le bras support des buses est dépourvu de cylindre d'appui latéral dans le document EP 1.721.685, celui ci étant remplacé par un patin qui ne nécessite pas de roulement à lubrifier. Par ailleurs, le dispositif de connexion dans cette antériorité vient se connecter aux empoises ce qui oblige d'acheminer le fluide selon une trajectoire complexe par l'intermédiaire de l'arbre creux et jusqu'à l'extrémité inférieure du bras support. Cette trajectoire du fluide, complexe, depuis l'empoise jusqu'au bras support, par l'intermédiaire de l'arbre creux, engendre des pertes de charge, limitant les débits.  As previously described, the document US.6,041,636 discloses automatic connection devices allowing, in the working position of the cylinders, to connect the lubricant source to lubrication bores provided in the chocks, and to automatically disconnect the bores when the intermediate cylinders are spaced vertically by the camber blocks. However, such a device can be used only to supply lubricant, or only the roller bearings of the lateral support cylinder of a support arm, or only to supply fluid to the nozzles of a support arm. This is the reason why the support arm of the nozzles is devoid of lateral support cylinder in the document EP 1.721.685, the latter being replaced by a pad which does not require a bearing to be lubricated. Furthermore, the connection device in this anteriority is connected to the chocks which requires to route the fluid along a complex path through the hollow shaft and to the lower end of the support arm. This fluid path, complex, from the chock to the support arm, through the hollow shaft generates losses, limiting flow rates.
En résumé, et selon l'état de la technique à la connaissance du demandeur, aujourd'hui, dans les laminoirs réversibles du type sexto supporté latéralement, à cassettes, les refroidissements des cylindres de travail et des cylindres intermédiaires sont effectués au moyen de buses placées en dehors de la cassette, physiquement à distance des cylindres de travail et des cylindres intermédiaires et dont les jets ne peuvent atteindre directement les cylindres de travail. Dans ce type de laminoir mis en œuvre industriellement, il est classique de placer une rampe de pulvérisation, de chaque côté du plan de serrage, embarquée sur la poutre de répartition d'effort de la cage et dont les jets sont dirigés au niveau du contact entre le cylindre d'appui et le cylindre intermédiaire. Selon cet agencement, la lubrification du cylindre de travail est donc obtenue, indirectement, par le fait que le cylindre intermédiaire a été mouillé et que ce cylindre transporte cette lubrification lors de sa rotation d'un demi tour, jusqu'au cylindre de travail. Selon les constatations des inventeurs, cette lubrification est insuffisante, en particulier pour les cylindres placés sous la bande. In summary, and according to the state of the art to the knowledge of the applicant, today, in the reversible mills of the sexto type supported laterally, with cassettes, the cooling of the working rolls and the intermediate rolls are carried out by means of nozzles placed outside the cassette, physically remote from the working cylinders and intermediate cylinders and whose jets can not reach the working cylinders directly. In this type of rolling mill, industrially, it is conventional to place a spray boom, on each side of the clamping plane, embarked on the force distribution beam of the cage and whose jets are directed at the contact between the support cylinder and the intermediate cylinder. According to this arrangement, the lubrication of the working cylinder is thus obtained, indirectly, in that the intermediate cylinder has been wet and that cylinder carries this lubrication during its rotation by half a turn, to the working cylinder. According to the findings of the inventors, this lubrication is insufficient, in particular for the cylinders placed under the band.
En outre, et lorsque la vitesse du laminoir devient importante, la force centrifuge à la circonférence du cylindre intermédiaire tend à essorer le cylindre de sorte que peu de fluide de refroidissement atteint le cylindre de travail.  In addition, and as the speed of the mill becomes large, the centrifugal force at the circumference of the intermediate roll tends to wring the roll so that little cooling fluid reaches the work roll.
Le but de la présente invention est de proposer un laminoir permettant de pallier les inconvénients précités.  The object of the present invention is to provide a rolling mill to overcome the aforementioned drawbacks.
Un autre but de la présente invention est de proposer un tel laminoir dont le système de refroidissement/lubrification ne complique pas les opérations de maintenance du laminoir, et en particulier le retrait des cylindres d'appui latéraux.  Another object of the present invention is to provide such a mill whose cooling / lubrication system does not complicate the mill maintenance operations, and in particular the withdrawal of the lateral support rolls.
Un autre but de la présente invention est de proposer un tel laminoir dont le système de refroidissement/lubrification autorise des débits de fluide importants.  Another object of the present invention is to provide such a mill whose cooling / lubrication system allows large fluid flow rates.
Un autre but de la présente invention est de proposer un laminoir qui autorise un refroidissement efficace des cylindres de travail, même lorsque le cylindre de travail voire le cylindre intermédiaire, sont de petits diamètres.  Another object of the present invention is to provide a rolling mill which allows efficient cooling of the working rolls, even when the working roll or the intermediate roll, are small diameters.
Un autre but de la présente invention est de proposer un laminoir qui autorise un refroidissement efficace des cylindres de travail, même lorsque le laminoir est amené à fonctionner à vitesse importante.  Another object of the present invention is to provide a rolling mill which allows efficient cooling of the working rolls, even when the mill is made to operate at high speed.
D'autres buts et avantages apparaîtront au cours de la description qui va suivre et qui n'a pas pour but de la limiter.  Other goals and advantages will become apparent from the following description which is not intended to limit it.
Aussi l'invention concerne un laminoir comprenant :  Also the invention relates to a rolling mill comprising:
- une cage de maintien comprenant deux paires de montants écartées entre-elles aux deux extrémités de la cage, au moins deux montants d'une même paire définissant une fenêtre d'accès, - deux cylindres de travail, aptes à enserrer une bande à laminer, deux cylindres d'appui, et deux cylindres intermédiaires, les cylindres d'appui et les cylindres intermédiaires étant montés rotatifs à leurs extrémités sur des empoises, a holding cage comprising two pairs of amounts spaced apart at the two ends of the cage, at least two posts of the same pair defining an access window, two work rolls, capable of gripping a strip to be rolled, two support rolls, and two intermediate rolls, the support rolls and the intermediate rollers being rotatably mounted at their ends on chocks,
- des cylindres d'appui latéraux, aptes à supporter latéralement les cylindres de travail, chaque cylindre d'appui latéral étant porté par un bras support, monté pivotant sur un axe,  - Lateral support cylinders, able to support laterally the working rolls, each lateral support roll being carried by a support arm, pivotally mounted on an axis,
- des poutres de répartition d'effort s 'étendant entre les montants correspondants de chaque paire, et des moyens d'application d'un effort de précharge sur chaque bras support, destinés à engager avec l'un des bras support au niveau d'une surface d'appui, et comprenant au moins un vérin de précharge solidaire de l'une des poutres de répartition d'effort,  stress distribution beams extending between the corresponding uprights of each pair, and means for applying a preload force on each support arm intended to engage with one of the support arms at the level of a bearing surface, and comprising at least one preload jack integral with one of the force distribution beams,
- une ou plusieurs buses de pulvérisation pour un fluide lubrifiant/refroidissant.  one or more spray nozzles for a lubricating / cooling fluid.
Selon l'invention au moins une des buses est embarquée sur l'un des bras supports et dans lequel le circuit d'alimentation en fluide de ladite au moins une buse comprend un dispositif de connexion/déconnexion comprenant:  According to the invention at least one of the nozzles is embedded on one of the support arms and wherein the fluid supply circuit of said at least one nozzle comprises a connection / disconnection device comprising:
- une conduite du bras support, destinée à canaliser le fluide, présentant une ouverture d'alimentation débouchant sur la surface d'appui du bras support destinée à engager avec les moyens d'application d'un effort de précharge,  a conduit of the support arm, intended to channel the fluid, having a feed opening opening on the bearing surface of the support arm intended to engage with the application means of a precharge force,
- une partie creuse, mobile par rapport à la poutre de répartition d'effort, déplaçable par rapport à ladite poutre de répartition d'effort sous l'action desdits moyens d'application d'un effort de précharge, apte à réaliser une liaison étanche avec l'ouverture d'alimentation sur la surface d'appui dans une première position de connexion du dispositif, ou au contraire s'escamoter dans une deuxième position de déconnexion, à distance de la surface d'appui.  a hollow part, movable relative to the force distribution beam, displaceable with respect to said force distribution beam under the action of said means for applying a preload force, capable of making a tight connection with the supply opening on the support surface in a first connection position of the device, or on the contrary retract into a second disconnection position, away from the support surface.
Selon des caractéristiques, optionnelles prises seules ou en combinaison :  According to optional features taken alone or in combination:
- la partie creuse est déplaçable en translation, selon une direction sensiblement horizontale, sous l'action desdits moyens d'application d'un effort de précharge, grâce à un élément support prévu coulissant par rapport à ladite poutre de répartition d'effort, une liaison rotule étant prévue entre la partie creuse et ledit élément support ;  the hollow part is displaceable in translation, in a substantially horizontal direction, under the action of said means for applying a precharge force, thanks to a support element slidably provided with respect to said force distribution beam; ball joint being provided between the hollow portion and said support member;
- la partie creuse comprend une surface de contact destinée à réaliser une liaison étanche avec la surface d'appui du bras support, ainsi qu'une surface hémisphérique destinée à coopérer avec une cavité complémentaire de l'élément support, afin de constituer la liaison rotule ; the hollow part comprises a contact surface intended to make a tight connection with the support surface of the support arm, as well as a hemispherical surface intended for cooperate with a complementary cavity of the support element, to form the ball joint;
- la surface hémisphérique est contrainte vers la cavité complémentaire au moyen d'une canalisation élastique présentant des soufflets, montée en tension entre la partie creuse et l'élément support ;  - The hemispherical surface is constrained to the complementary cavity by means of an elastic pipe having bellows, mounted in tension between the hollow portion and the support member;
- le circuit d'alimentation peut comprendre un flexible entre l'élément support, mobile, et la source de lubrifiant/produit de refroidissement.  the supply circuit may comprise a hose between the mobile support element and the lubricant / cooling product source.
Selon un mode de réalisation, chaque bras support d'un cylindre d'appui latéral est monté pivotant sur ledit axe, constitué par un arbre solidaire des empoises d'un des cylindres intermédiaires, chaque cylindre intermédiaire, empoises du cylindre intermédiaire, cylindres d'appui latéraux et bras supports correspondants formant un ensemble autoportant, appelé insert, qui peut être retiré ou introduit par coulis sèment au travers de la fenêtre d'accès lors de la maintenance.  According to one embodiment, each support arm of a lateral support cylinder is pivotally mounted on said axis, constituted by a shaft integral with the chocks of one of the intermediate cylinders, each intermediate cylinder, chocks of the intermediate cylinder, cylinders of lateral support and corresponding support arms forming a self-supporting assembly, called insert, which can be removed or grouted through the access window during maintenance.
En particulier, chaque cylindre d'appui latéral peut être supporté par des galets d'appui, les galets d'appui étant montés sur des axes des bras support par l'intermédiaire de roulements, et dans lequel le bras support comprend un circuit d'alimentation en fluide pour la lubrification des roulements, distinct du circuit d'alimentation de ladite au moins une buse. En particulier, le circuit d'alimentation pour la lubrification des roulements peut comprendre l'arbre sur lequel est monté pivotant le bras support, ledit arbre étant creux, tel que connu de l'état de l'art.  In particular, each lateral support cylinder can be supported by support rollers, the support rollers being mounted on the axes of the support arms by means of bearings, and in which the support arm comprises a support circuit. fluid supply for the lubrication of the bearings, separate from the supply circuit of said at least one nozzle. In particular, the feed circuit for the lubrication of the bearings may comprise the shaft on which is mounted pivoting the support arm, said shaft being hollow, as known from the state of the art.
Selon un mode de réalisation avantageux, ladite au moins une buse est dirigée de telle façon que le jet soit dirigé directement sur la bande métallique à laminer et de telle façon que le jet glisse sur la bande à laminer jusqu'au cylindre de travail.  According to an advantageous embodiment, said at least one nozzle is directed in such a way that the jet is directed directly on the metal strip to be rolled and in such a way that the jet slides on the strip to be rolled up to the working roll.
Selon un mode de réalisation avantageux, ladite au moins une buse est dirigée de telle façon que le jet soit dirigé sur le cylindre intermédiaire, à proximité de la zone de contact entre le cylindre de travail et le cylindre intermédiaire, et de telle façon qu'entraîné par le cylindre intermédiaire, le fluide du jet arrive jusqu'au cylindre de travail. According to an advantageous embodiment, said at least one nozzle is directed in such a way that the jet is directed on the intermediate cylinder, close to the contact zone between the working roll and the intermediate roll, and in such a way that driven by the intermediate cylinder, the jet fluid reaches the working cylinder.
L'invention concerne également un procédé de refroidissement d'un laminoir dans lequel on arrose le cylindre de travail grâce à au moins une buse, le jet de la buse étant suffisamment puissant pour atteindre ledit cylindre de travail en glissant sur la bande à laminer, à contre courant du sens de défilement de la bande à laminer. L'invention sera mieux comprise à la lecture de la description suivante, accompagnée des figures en annexe, parmi lesquelles : The invention also relates to a method of cooling a rolling mill in which the working roll is sprayed with at least one nozzle, the jet of the nozzle being sufficiently powerful to reach said working roll by sliding on the strip to be rolled, against the current of the direction of travel of the strip to be rolled. The invention will be better understood on reading the following description, accompanied by the appended figures, among which:
- La figure 1 est une vue partielle, d'un laminoir conforme à l'invention illustrant la partie supérieure du laminoir, et plus particulièrement le cylindre d'appui, le cylindre intermédiaire et le cylindre de travail, les cylindres d'appui latéraux, ainsi que leur bras support.  FIG. 1 is a partial view of a rolling mill according to the invention illustrating the upper part of the rolling mill, and more particularly the support roll, the intermediate roll and the working roll, the lateral support rolls, as well as their support arm.
- La figure 2 est une vue partielle, de détail, illustrant un dispositif de connexion/déconnexion dans ladite première position de connexion du dispositif, FIG. 2 is a partial view, in detail, illustrating a connection / disconnection device in said first connection position of the device,
- La figure 3 est une vue en perspective de la cage de maintien, et plus particulièrement de la possibilité de réglage entre la poutre de répartion d'effort par rapport aux montants de la cage. - Figure 3 is a perspective view of the holding cage, and more particularly the possibility of adjustment between the force distribution beam relative to the amounts of the cage.
Aussi l'invention concerne tout d'abord un laminoir 1 comprenant : Also the invention relates first of all to a rolling mill 1 comprising:
- une cage de maintien 30 comprenant deux paires de montants 31 écartées entre-elles aux deux extrémités de la cage, au moins deux montants d'une même paire définissant une fenêtre d'accès,  a holding cage 30 comprising two pairs of uprights 31 spaced apart from each other at the two ends of the cage, at least two uprights of the same pair defining an access window,
- deux cylindres de travail 2, aptes à enserrer une bande à laminer, deux cylindres d'appui 4, et deux cylindres intermédiaires 3, les cylindres d'appui 4 et les cylindres intermédiaires 3, étant montés rotatifs à leurs extrémités sur des empoises,  two working rolls 2 capable of gripping a strip to be rolled, two support rolls 4 and two intermediate rolls 3, the support rollers 4 and the intermediate rollers 3 being rotatably mounted at their ends on chocks,
- des cylindres d'appui latéraux 5, aptes à supporter latéralement les cylindres de travail 2, chaque cylindre d'appui latéral étant porté par un bras support 6, monté pivotant sur un axe 7,  - Lateral support rollers 5, able to support laterally the working rolls 2, each lateral support roll being carried by a support arm 6, pivotally mounted on an axis 7,
- des poutres de répartition d'effort 8 s'étendant entre les montants correspondants de chaque paire, et des moyens 9 d'application d'un effort de précharge sur chaque bras support 6, destinés à engager avec l'un des bras support au niveau d'une surface d'appui 10, et comprenant au moins un vérin de précharge 11 solidaire de l'une des poutres de répartition d'effort 8,  stress distribution beams 8 extending between the corresponding uprights of each pair, and means 9 for applying a preload force to each support arm 6, intended to engage with one of the support arms at level of a bearing surface 10, and comprising at least one preloading jack 11 secured to one of the force distribution beams 8,
- une ou plusieurs buses de pulvérisation pour un fluide lubrifiant/refroidissant.  one or more spray nozzles for a lubricating / cooling fluid.
Les cylindres de travail 2, les cylindres intermédiaires 3 et les cylindres d'appui 4 sont sensiblement à axes parallèles, les axes des cylindres 2,3,4 étant contenus dans un plan de serrage sensiblement perpendiculaire à la bande à laminer B. Les deux cylindres de travail 2 sont situés de part et d'autre de la bande à laminer, leur écartement définissant l'entrefer de passage en fonctionnement. Chaque cylindre intermédiaire 3 est interposé entre le cylindre de travail 2 et le cylindre d'appui 4 correspondant. Le cylindre de travail entraîné en rotation, indirectement par la mise en rotation du cylindre intermédiaire 3. The working cylinders 2, the intermediate cylinders 3 and the support rollers 4 are substantially parallel axes, the axes of the cylinders 2,3,4 being contained in a clamping plane substantially perpendicular to the strip to be rolled B. Both 2 working cylinders are located on either side of the strip to be rolled, their spacing defining the working air gap. Each intermediate cylinder 3 is interposed between the working cylinder 2 and the corresponding support cylinder 4. The working roll rotated indirectly by rotating the intermediate roll 3.
Les cylindres d'appui latéraux 5 sont de préférence au nombre de deux par cylindre de travail 2 et permettent de maintenir le cylindre de travail 2, latéralement des deux côtés du plan de serrage. Il s'agit ainsi de préférence d'un laminoir réversible. Chaque cylindre d'appui latéral 5 est monté sur un bras support 6 monté pivotant sur un axe 7. Selon un mode de réalisation, chaque bras support 6 peut être monté pivotant sur un arbre solidaire à ses extrémités des empoises des cylindres intermédiaires, tel qu'enseigné par le document US 4.531.394 ou encore le document US 6.041.636. Dans cette conception de laminoir, chaque cylindre intermédiaire 3, empoises du cylindre intermédiaire, cylindres d'appui latéraux 5 et bras supports correspondants 6 forment un ensemble autoportant, couramment appelé « insert » ou « cassette », qui peut être retiré ou introduit par coulissement au travers de la fenêtre d'accès lors de la maintenance. Alternativement, et selon un autre mode de réalisation enseigné par le document WO 2011/107165 Al, chaque bras support 6 peut être monté pivotant sur des blocs de cambrage, aptes à être déplacés verticalement par rapport aux montants de la cage. Les poutres de répartition d'effort 8 s'étendent entre les montants correspondants de chaque paire, respectivement en vis-à-vis de chaque bras support, au moins lors du fonctionnement. Les moyens 9 d'application d'un effort de précharge sur chaque bras support 6 sont destinés à engager avec l'un des bras support au niveau d'une surface d'appui 10, et comprennent au moins un vérin 11 de précharge solidaire de l'une des poutres de répartition d'effort 8. La position de la poutre de répartition d'effort 8 peut être réglée horizontalement par rapport aux montants 31. A cet effet, des actionneurs vis/écrou 81 synchronisés peuvent être prévus, pour rapprocher la poutre de répartition d'effort vers le bras support 6, ou au contraire éloigner la poutre de répartition d'effort 8 dudit bras support 6. En fonctionnement, le cylindre de travail est généralement contraint à appuyer le cylindre d'appui latéral 5 en amont, suivant le sens de défilement de la bande B. La poutre de répartition d'effort 8, aval, est positionnée de quelques millimètres du bras support 6, aval. Les moyens 9 d'application d'un effort de précharge sont alors utilisés pour rattraper le jeu et assurer le contact du cylindre d'appui latéral 5, aval. The lateral support rollers 5 are preferably two in number per work roll 2 and serve to hold the work roll 2 laterally on both sides of the clamping plane. It is thus preferably a reversible mill. Each lateral support cylinder 5 is mounted on a support arm 6 pivotally mounted on an axis 7. According to one embodiment, each support arm 6 can be pivotally mounted on a shaft integral at its ends with the chocks of the intermediate cylinders, such that taught by US 4,531,394 or US 6,041,636. In this rolling mill design, each intermediate roll 3, chocks of the intermediate roll, lateral support rolls 5 and corresponding support arms 6 form a self-supporting assembly, commonly called "insert" or "cassette", which can be removed or slidably introduced. through the access window during maintenance. Alternatively, and according to another embodiment taught by WO 2011/107165 A1, each support arm 6 can be pivotally mounted on bending blocks, able to be moved vertically relative to the amounts of the cage. The force distribution beams 8 extend between the corresponding amounts of each pair, respectively vis-à-vis each support arm, at least during operation. The means 9 for applying a preload force on each support arm 6 are intended to engage with one of the support arms at a bearing surface 10, and comprise at least one integral preload jack 11 of one of the force distribution beams 8. The position of the force distribution beam 8 can be adjusted horizontally relative to the uprights 31. For this purpose, synchronized screw / nut 81 actuators can be provided, to bring closer the force distribution beam towards the support arm 6, or on the contrary move the force distribution beam 8 away from said support arm 6. In operation, the working cylinder is generally forced to press the lateral support cylinder 5 into position. upstream, in the direction of travel of the band B. The force distribution beam 8, downstream, is positioned a few millimeters from the support arm 6, downstream. Means 9 for applying a preload force are then used to catch the game and ensure contact of the lateral support cylinder 5, downstream.
Le laminoir comprend la ou lesdites buses de pulvérisation pour un fluide lubrifiant/ refroidissant, ces buses étant notamment destinées à refroidir/lubrifier les cylindres de travail, directement ou indirectement et/ ou les autres cylindres du laminoir.  The rolling mill comprises the one or more spray nozzles for a lubricating / cooling fluid, these nozzles being in particular intended to cool / lubricate the working rolls, directly or indirectly and / or the other rolls of the rolling mill.
Selon l'invention, au moins une des buses 12, 12' est embarquée sur l'un des bras supports 6, en particulier pour permettre la lubrification/refroidissement des cylindres de travail et/ou des cylindres intermédiaires. According to the invention, at least one of the nozzles 12, 12 'is embedded on one of the support arms 6, in particular to allow the lubrication / cooling of the working rolls and / or the intermediate rolls.
Avantageusement, le circuit d'alimentation en fluide de ladite au moins une buse 12, 12' comprend un dispositif 13 de connexion/déconnexion comprenant :  Advantageously, the fluid supply circuit of said at least one nozzle 12, 12 'comprises a connection / disconnection device 13 comprising:
- une conduite 14 du bras support 6, destinée à canaliser le fluide, présentant une ouverture d'alimentation 15 débouchant sur la surface d'appui 10 du bras support 6 destinée à engager les moyens 9 d'application d'un effort de précharge,  a line 14 of the support arm 6, intended to channel the fluid, having a feed opening 15 opening on the bearing surface 10 of the support arm 6 intended to engage the means 9 for applying a precharge force,
- une partie creuse 16, mobile par rapport à la poutre de répartition d'effort, déplaçable par rapport à ladite poutre de répartition d'effort 8 sous l'action desdits moyens 9 d'application d'un effort de précharge.  - A hollow portion 16, movable relative to the force distribution beam, movable relative to said force distribution beam 8 under the action of said means 9 for applying a preload force.
Selon l'invention, cette partie creuse 16 est apte à réaliser une liaison étanche avec l'ouverture d'alimentation 15 sur la surface d'appui 10 dans une première position de connexion, ou au contraire, s'escamoter dans une deuxième position de déconnexion, à distance de la surface d'appui 10.  According to the invention, this hollow portion 16 is able to make a tight connection with the feed opening 15 on the bearing surface 10 in a first connection position, or on the contrary, retract into a second position of disconnection, away from the support surface 10.
Dans la première position de connexion, telle qu'illustrée à la figure 2, le fluide de refroidissement peut être canalisé depuis la source jusqu'à ladite au moins une buse repérée 12 (illustré) ou encore jusqu'à ladite au moins une buse repérée 12' (non illustré), par l'intermédiaire dudit dispositif de connexion/déconnexion.  In the first connection position, as illustrated in FIG. 2, the cooling fluid can be channeled from the source to the said at least one marked nozzle 12 (illustrated) or to the said at least one marked nozzle. 12 '(not shown), via said connection / disconnection device.
Dans la deuxième position de déconnexion (non illustrée), les moyens 9 d'application d'un effort de précharge sont escamotés, en position rétractée, ladite partite creuse 16 étant à distance du bras support 6. Cette position permet, en particulier lorsque la conception du laminoir est du type à insert (ou à cassette) de pouvoir retirer ou introduire l'insert, sans nécessiter de temps de maintenance supplémentaire pour déconnecter/connecter la source de fluide. In the second disconnection position (not shown), the means 9 for applying a precharge force are retracted, in the retracted position, said hollow partite 16 being at a distance from the support arm 6. This position makes it possible, in particular when the The mill design is of the insert type (or cassette) to be able to remove or insert the insert, without requiring additional maintenance time to disconnect / connect the source of fluid.
Un autre avantage d'un tel dispositif de connexion/déconnexion est qu'il vient se connecter directement au bras support, et non aux empoises du cylindre intermédiaire comme enseigné dans l'état de la technique connu du document US.6, 041,636. Pour arriver jusqu'à la buse 12 ou 12', dans un laminoir de type à insert selon l'invention, le fluide n'a pas besoin de traverser l'arbre creux sur lequel le bras support est monté pivotant. Il est alors possible d'obtenir des débits de fluide bien supérieurs à ceux obtenus dans cet état de la technique. Another advantage of such a connection / disconnection device is that it connects directly to the support arm, and not to the chocks of the intermediate cylinder. as taught in the prior art known from US.6, 041,636. To reach the nozzle 12 or 12 ', in an insert type mill according to the invention, the fluid does not need to pass through the hollow shaft on which the support arm is pivotally mounted. It is then possible to obtain fluid flow rates much higher than those obtained in this state of the art.
Dans l'invention, le creux de l'arbre peut éventuellement servir, comme dans l'état de la technique pour canaliser un fluide destiné à lubrifier les roulements des galets 52 supportant latéralement le cylindre d'appui latéral 5.  In the invention, the hollow of the shaft may possibly be used, as in the state of the art, for channeling a fluid intended to lubricate the bearings of the rollers 52 laterally supporting the lateral support cylinder 5.
Aussi et selon un mode de réalisation, chaque cylindre d'appui latéral 5 est supporté par des galets 52, les galets 52 étant montés sur des axes 50,51, parallèles, du bras support 6 par l'intermédiaire de roulements. Le bras support 6 comprend un circuit d'alimentation en lubrifiant pour les roulements, distinct du circuit d'alimentation de ladite au moins une buse 12, 12'. Le circuit d'alimentation en lubrifiant pour les roulements peut comprendre l'arbre sur lequel est monté pivotant le bras support 6, ledit arbre étant creux, traversé au moins en partie par le lubrifiant.  Also and according to one embodiment, each lateral support cylinder 5 is supported by rollers 52, the rollers 52 being mounted on parallel axes 50, 51, of the support arm 6 by means of bearings. The support arm 6 comprises a lubricant supply circuit for the bearings, distinct from the supply circuit of said at least one nozzle 12, 12 '. The lubricant supply circuit for the bearings may comprise the shaft on which is pivotally mounted the support arm 6, said shaft being hollow, traversed at least in part by the lubricant.
Selon un mode de réalisation, illustré non limitativement à la figure 1, la partie creuse 16 est déplaçable en translation, selon une direction sensiblement horizontale, sous l'action desdits moyens d'application d'un effort de précharge, grâce à un élément support 17 prévu coulissant par rapport à ladite poutre de répartition d'effort 8. Cet élément support 17 peut coulisser au niveau d'un alésage de la poutre de répartition d'effort, sous l'action du vérin 11 qui peut être double effet. Lorsque le vérin 11, se déploie, l'élément support 17 et la partie creuse 16 se déplacent conjointement en direction du bras support 6. A l'inverse, lorsque le vérin 11 se rétracte, l'élément support 17 et la partie creuse 16 s'éloignent du bras support 17.  According to one embodiment, illustrated in non-limiting manner in FIG. 1, the hollow portion 16 is displaceable in translation, in a substantially horizontal direction, under the action of said means for applying a preload force, thanks to a support element 17 slidable relative to said force distribution beam 8. This support member 17 can slide at a bore of the force distribution beam, under the action of the cylinder 11 which can be double effect. When the cylinder 11 unfolds, the support member 17 and the hollow portion 16 move together in the direction of the support arm 6. Conversely, when the cylinder 11 retracts, the support member 17 and the hollow portion 16 move away from the support arm 17.
Une liaison rotule peut être prévue entre la partie creuse 16 et ledit élément support 17. Cette liaison rotule permet de s'assurer que la surface de contact 18 de la partie creuse 16, s'incline selon le plan de la surface d'appui 10 du bras support 6 dans ladite position de connexion.  A ball joint can be provided between the hollow portion 16 and said support member 17. This ball joint makes it possible to ensure that the contact surface 18 of the hollow portion 16 is inclined along the plane of the bearing surface 10 of the support arm 6 in said connection position.
Par exemple, selon le mode de réalisation illustré, la liaison rotule comprend une surface hémisphérique 19 de la partie creuse destinée à coopérer avec une cavité de forme complémentaire 20 de l'élément support 17. Selon un mode de réalisation, la surface hémisphérique 19 est contrainte vers la cavité complémentaire 20 au moyen d'une canalisation élastique 21 présentant des soufflets 22, montée en tension entre la partie creuse 16 et l'élément support 17. Cette canalisation élastique 17 permet le maintien de la partie creuse 16 sur l'élément support 17. Les soufflets de la canalisation élastique 21 confèrent une élasticité nécessaire pour que la partie creuse 16 puisse pivoter dans la cavité 20, selon une liaison rotule. For example, according to the illustrated embodiment, the ball joint comprises a hemispherical surface 19 of the hollow portion intended to cooperate with a complementary shaped cavity 20 of the support member 17. According to one embodiment, the hemispherical surface 19 is constrained towards the complementary cavity 20 by means of an elastic duct 21 having bellows 22, mounted in tension between the hollow portion 16 and the support element 17. This elastic duct 17 allows maintaining the hollow portion 16 on the support member 17. The bellows of the elastic pipe 21 provide a necessary elasticity so that the hollow portion 16 can pivot in the cavity 20, in a ball joint connection.
Le circuit d'alimentation peut comprendre un flexible 23 entre l'élément support 17, mobile, et la source de lubrifiant/produit de refroidissement. En fonctionnement, dans ladite première position de connexion, le fluide arrive de la source, traverse le flexible 23 jusqu'à un alésage de l'élément support 17, puis s'écoule dans la canalisation élastique 21, au travers de la partie creuse 16, jusqu'à atteindre l'ouverture d'alimentation 15. A partir de cette ouverture, le fluide s'écoule dans le bras support 6 au travers de la conduite 14 jusqu'à ladite au moins une buse 12 qui peut être solidaire du support des galets 52, ou encore ladite au moins une buse 12' qui peut être solidaire directement sur le corps du bras support 6. The supply circuit may include a hose 23 between the movable support member 17 and the lubricant / coolant source. In operation, in said first connection position, the fluid arrives from the source, passes through the hose 23 to a bore of the support member 17, then flows into the elastic pipe 21, through the hollow portion 16 until it reaches the feed opening 15. From this opening, the fluid flows in the support arm 6 through the pipe 14 to the at least one nozzle 12 which can be secured to the support rollers 52, or said at least one nozzle 12 'which can be integral directly on the body of the support arm 6.
De préférence, une pluralité de buses 12 et/ou 12' peuvent être agencées sur la longueur du bras support 6 de telle façon à pouvoir refroidir le cylindre de travail et/ou le cylindre intermédiaire sur toute sa longueur.  Preferably, a plurality of nozzles 12 and / or 12 'may be arranged along the length of the support arm 6 so as to be able to cool the working roll and / or the intermediate roll over its entire length.
De préférence, ladite au moins une buse 12 peut être dirigée de telle façon que le jet soit dirigé directement sur la bande à laminer, et non directement sur le cylindre de travail, et de telle façon que le jet glisse sur la bande à laminer en direction du cylindre de travail 2.  Preferably, said at least one nozzle 12 can be directed in such a way that the jet is directed directly on the strip to be rolled, and not directly on the working roll, and in such a way that the jet slides on the strip to be rolled. work roll direction 2.
Une telle orientation des buses 12 permet avantageusement de refroidir efficacement le cylindre de travail lorsque le cylindre de travail et le cylindre intermédiaire sont de petits diamètres et interdisent d'asperger directement le cylindre de travail.  Such orientation of the nozzles 12 advantageously allows to effectively cool the working cylinder when the working cylinder and the intermediate cylinder are small diameters and prohibit directly spraying the working cylinder.
Cette orientation de ladite au moins une buse 12 permet de refroidir le cylindre de travail, même lorsque le jet est aspergé à contre courant du sens de défilement de la bande à laminer, tel qu'illustré à la figure 2. Ceci est rendu possible en ce que ladite au moins une buse 12, supportée par le bras pivotant 6 est située à proximité du cylindre de travail, et en ce que l'invention permet l'obtention de débit de fluide important. Cette proximité et de tels débits permettent que le jet glisse sur la bande à contre courant du sens de défilement de la bande jusqu'à atteindre le cylindre de travail. Alternativement ou additionnellement, ladite au moins une buse 12' peut être dirigée de telle façon que le jet soit dirigé sur le cylindre intermédiaire 3, à proximité de la zone de contact Z entre le cylindre de travail 2 et le cylindre intermédiaire 3, et de telle façon qu'entraîné par le cylindre intermédiaire, le fluide du jet arrive jusqu'au cylindre de travail 2. This orientation of the at least one nozzle 12 makes it possible to cool the working roll, even when the jet is sprayed against the current of the direction of travel of the strip to be rolled, as illustrated in FIG. 2. This is made possible by that said at least one nozzle 12, supported by the pivoting arm 6 is located near the working cylinder, and in that the invention allows to obtain significant fluid flow. This proximity and such flow rates allow the jet to slide on the web against the running direction of the tape until it reaches the working cylinder. Alternatively or additionally, said at least one nozzle 12 'can be directed in such a way that the jet is directed on the intermediate cylinder 3, close to the contact zone Z between the working roll 2 and the intermediate roll 3, and such that, driven by the intermediate cylinder, the jet fluid reaches the working cylinder 2.
L'invention permet ainsi de placer une ou plusieurs buses 12' sur les bras support 6, à proximité de cette zone Z, et d'ainsi d'arroser le cylindre intermédiaire 3, au plus près de cette zone, et non seulement au niveau de la zone de contact cylindre d'appui 4/cylindre intermédiaire 3, tel que connu dans l'état de la technique. Contrairement au laminoir de l'état de la technique, lorsque le cylindre intermédiaire 3 est animé en rotation à vitesse importante, la majeure partie du fluide du jet atteint le cylindre de travail 2, quelle que soit l'action de la force centrifuge.  The invention thus makes it possible to place one or more nozzles 12 'on the support arms 6, close to this zone Z, and thus to water the intermediate cylinder 3, as close as possible to this zone, and not only of the bearing cylinder contact zone 4 / intermediate cylinder 3, as known in the state of the art. Unlike the rolling mill of the state of the art, when the intermediate cylinder 3 is rotated at high speed, most of the jet fluid reaches the working cylinder 2, whatever the action of the centrifugal force.
De telles buses 12, 12' peuvent être prévues sur tout ou partie des deux bras support des cylindres d'appui latéraux supérieurs et sur tout ou partie des deux bras support des cylindres d'appui latéraux inférieurs.  Such nozzles 12, 12 'may be provided on all or part of the two support arms of the upper lateral support cylinders and on all or part of the two support arms of the lower lateral support cylinders.
Selon un mode de réalisation avantageux, les buses 12,12' sont prévues sur les quatre bras support, un dispositif de connexion/déconnexion étant prévu entre chaque bras support et la poutre de répartition d'effort correspondante.  According to an advantageous embodiment, the nozzles 12, 12 'are provided on the four support arms, a connection / disconnection device being provided between each support arm and the corresponding force distribution beam.
Selon ce dernier mode de réalisation, l'invention permet de refroidir/lubrifier : According to this last embodiment, the invention makes it possible to cool / lubricate:
- chacun des deux cylindres de travail, supérieur et inférieur, de part et d'autre du plan de serrage du laminoir,  each of the two working cylinders, upper and lower, on each side of the clamping plane of the rolling mill,
- chacun des deux cylindres intermédiaires, supérieur et inférieur, et également, - each of the two intermediate cylinders, upper and lower, and also,
- les zones de contacts cylindres intermédiaires 3 et cylindres de travail 2, notamment de part et d'autre du plan de serrage du laminoir. the zones of intermediate cylinder contact 3 and working rolls 2, in particular on either side of the clamping plane of the rolling mill.
Naturellement, d'autres modes de réalisation, auraient pu être envisagés par l'homme du métier sans pour autant sortir du cadre de l'invention définie par les revendications ci- après. NOMENCLATURE Naturally, other embodiments could have been envisaged by those skilled in the art without departing from the scope of the invention defined by the claims below. NOMENCLATURE
1. Laminoir,1. Rolling mill,
. Cylindre de travail,  . Work cylinder,
3. Cylindre intermédiaire, 3. Intermediate cylinder,
. Cylindre d'appui  . Support cylinder
5. Cylindre d'appui latéral,  5. Lateral support cylinder,
6. Bras support (Cylindre d'appui latéral 5),  6. Support Arm (Lateral Support Cylinder 5),
7. Axe de pivotement (Bras support 6),  7. Pivot axis (support arm 6),
8. Poutre de répartition d'effort,  8. Stress distribution beam,
9. Moyens d'application d'un effort de précharge, 9. Means for applying a preload force,
10. Surface d'appui (Bras support 6), 10. Support surface (support arm 6),
11. Vérin (Moyen d'application d'un effort de précharge), 11. Cylinder (means of application of a preload force),
12. Buses de pulvérisation (sur bande), 12. Spray nozzles (on tape),
12'. Buses de pulvérisation (sur rouleau intermédiaire), 12 '. Spray nozzles (on intermediate roll),
13. Dispositif de connexion/déconnexion, 13. Connection / disconnection device,
14. Conduite (Bras support),  14. Driving (Support arm),
15. Ouverture d'alimentation,  15. Feed opening,
16. Partie creuse,  16. Hollow part,
17. Elément support,  17. Support element,
18. Surface de contact (Partie creuse 16),  18. Contact surface (hollow portion 16),
19. Surface hémisphérique (Partie creuse 16),  19. Hemispherical surface (hollow part 16),
20. Cavité (Elément support 17),  20. Cavity (support element 17),
21. Canalisation élastique,  21. Elastic pipeline,
22. Soufflets,  22. Bellows,
23. Flexible  23. Flexible
30. Cage de maintien,  30. Holding cage,
31. Montants,  31. Amounts,
50,51 Axes (support des galets),  50,51 Axes (support of the rollers),
52. Galets, 52. Rollers,
81. Actionneurs vis/écrou,  81. Actuators screw / nut,
B. Bande à laminer, Z. Zone de contact cylindre de travail 2/cylindre intermédiaire 3. B. Lamination tape, Z. Contact zone working cylinder 2 / intermediate cylinder 3.

Claims

REVENDICATIONS
1. Laminoir (1) comprenant: 1. Rolling mill (1) comprising:
- une cage de maintien (30) comprenant deux paires de montants (31) écartées entre- elles aux deux extrémités de la cage, au moins deux montants d'une même paire définissant une fenêtre d'accès,  - a holding cage (30) comprising two pairs of uprights (31) spaced apart at both ends of the cage, at least two amounts of the same pair defining an access window,
- deux cylindres de travail (2), aptes à enserrer une bande à laminer, deux cylindres d'appui (4), et deux cylindres intermédiaires (3), les cylindres d'appui (4) et les cylindres intermédiaires (3) étant montés rotatifs à leurs extrémités sur des empoises, two work rolls (2) capable of gripping a strip to be rolled, two support rollers (4) and two intermediate rollers (3), the support rollers (4) and the intermediate rollers (3) being rotatably mounted at their ends on chocks,
- des cylindres d'appui latéraux (5), aptes à supporter latéralement les cylindres de travail (2), chaque cylindre d'appui latéral étant porté par un bras support (6), monté pivotant sur un axe (7), - Lateral support cylinders (5), able to support laterally the working rolls (2), each lateral support roll being carried by a support arm (6), pivotally mounted on an axis (7),
- des poutres de répartition d'effort (8) s'étendant entre les montants correspondants de chaque paire, et des moyens (9) d'application d'un effort de précharge sur chaque bras support (6), destinés à engager avec l'un des bras support au niveau d'une surface d'appui (10), et comprenant au moins un vérin de précharge (11) solidaire de l'une des poutres de répartition d'effort (8),  stress distribution beams (8) extending between the corresponding uprights of each pair, and means (9) for applying a preload force on each support arm (6) intended to engage with the one of the support arms at a bearing surface (10), and comprising at least one precharging cylinder (11) integral with one of the force distribution beams (8),
- une ou plusieurs buses de pulvérisation pour un fluide lubrifiant/ refroidissant, caractérisé en ce qu'au moins une des buses (12, 12'), est embarquée sur l'un des bras supports (6) et dans lequel le circuit d'alimentation en fluide de ladite au moins une buse (12, 12') comprend un dispositif (13) de connexion/déconnexion comprenant : one or more spray nozzles for a lubricating / cooling fluid, characterized in that at least one of the nozzles (12, 12 ') is embedded in one of the support arms (6) and in which the fluid supply of said at least one nozzle (12, 12 ') comprises a connection / disconnection device (13) comprising:
- une conduite (14) du bras support (6), destinée à canaliser le fluide, présentant une ouverture d'alimentation (15) débouchant sur la surface d'appui du bras support destinée à engager les moyens (9) d'application d'un effort de précharge, a conduit (14) of the support arm (6) intended to channel the fluid, having a feed opening (15) opening on the bearing surface of the support arm intended to engage the means (9) for applying a preload effort,
- une partie creuse (16), mobile par rapport à la poutre de répartition d'effort (8), déplaçable par rapport à ladite poutre de répartition d'effort (8) sous l'action desdits moyens (9) d'application d'un effort de précharge, apte à réaliser une liaison étanche avec l'ouverture d'alimentation (15) sur la surface d'appui (10) dans une première position de connexion, ou au contraire s'escamoter dans une deuxième position de déconnexion, à distance de la surface d'appui (10). a hollow part (16), movable relative to the force distribution beam (8), displaceable with respect to said force distribution beam (8) under the action of said application means (9) a preloading force, able to make a tight connection with the supply opening (15) on the bearing surface (10) in a first connection position, or on the contrary retract into a second disconnection position away from the bearing surface (10).
2. Laminoir selon la revendication 1, dans lequel la partie creuse (16) est déplaçable en translation, selon une direction sensiblement horizontale, sous l'action desdits moyens2. Rolling mill according to claim 1, wherein the hollow portion (16) is displaceable in translation, in a substantially horizontal direction, under the action of said means
(9) d'application d'un effort de précharge, grâce à un élément support (17) prévu coulissant par rapport à ladite poutre de répartition d'effort (8), une liaison rotule étant prévue entre la partie creuse (16) et ledit élément support (17). (9) applying a preload force, thanks to a support member (17) slidably provided with respect to said force distribution beam (8), a ball joint being provided between the hollow portion (16) and said support member (17).
3. Laminoir selon la revendication 2, dans lequel la partie creuse (16) comprend une surface de contact (18) destinée à réaliser une liaison étanche avec la surface d'appuiRolling mill according to Claim 2, in which the hollow part (16) comprises a contact surface (18) intended to make a tight connection with the bearing surface.
(10) , ainsi qu'une surface hémisphérique (19) destinée à coopérer avec une cavité complémentaire (20) de l'élément support, afin de constituer la liaison rotule. (10), and a hemispherical surface (19) for cooperating with a complementary cavity (20) of the support member, to form the ball joint.
4. Laminoir selon la revendication 3, dans lequel la surface hémisphérique (19) est contrainte vers la cavité complémentaire (20) au moyen d'une canalisation élastique (21) présentant des soufflets (22), montée en tension entre la partie creuse (16) et l'élément support (17). 4. Rolling mill according to claim 3, wherein the hemispherical surface (19) is constrained towards the complementary cavity (20) by means of an elastic pipe (21) having bellows (22), mounted in tension between the hollow portion ( 16) and the support member (17).
5. Laminoir selon l'une des revendications 1 à 4, dans lequel le circuit d'alimentation comprend un flexible (23) entre l'élément support (17), mobile, et la source de lubrifiant/produit de refroidissement. Rolling mill according to one of claims 1 to 4, wherein the feed circuit comprises a hose (23) between the movable support member (17) and the lubricant / coolant source.
6. Laminoir selon l'une des revendications 1 à 5, dans lequel chaque bras support (6) d'un cylindre d'appui latéral (5) est monté pivotant sur ledit axe (7), constitué par un arbre solidaire des empoises d'un des cylindres intermédiaires (3), chaque cylindre intermédiaire (3), empoises du cylindre intermédiaire, cylindres d'appui latéraux (5) et bras supports correspondants (6) formant un ensemble autoportant, appelé insert, qui peut être retiré ou introduit par coulissement au travers de la fenêtre d'accès lors de la maintenance. 6. Rolling mill according to one of claims 1 to 5, wherein each support arm (6) of a lateral support cylinder (5) is pivotally mounted on said axis (7), consisting of a shaft integral with the chocks d one of the intermediate cylinders (3), each intermediate cylinder (3), chocks of the intermediate cylinder, lateral support cylinders (5) and corresponding support arms (6) forming a self-supporting assembly, called insert, which can be withdrawn or introduced by sliding through the access window during maintenance.
7. Laminoir selon la revendication 6, dans lequel chaque cylindre d'appui latéral (5) est supporté par des galets d'appui, les galets d'appui étant montés sur des axes (50,51) des bras support (6) par l'intermédiaire de roulements, et dans lequel le bras support (6) comprend un circuit d'alimentation en lubrifiant pour les roulements, distinct du circuit d'alimentation de ladite au moins une buse (12,12'). Rolling mill according to Claim 6, in which each lateral support roll (5) is supported by support rollers, the support rollers being mounted on pins (50, 51) of the support arms (6) by the intermediate of bearings, and wherein the support arm (6) comprises a lubricant supply circuit for the bearings, separate from the supply circuit of said at least one nozzle (12, 12 ').
8. Laminoir selon la revendication 7 dans lequel le circuit d'alimentation en lubrifiant pour les roulements comprend l'arbre sur lequel est monté pivotant le bras support (6), ledit arbre étant creux. 8. Rolling mill according to claim 7 wherein the lubricant supply circuit for the bearings comprises the shaft on which is pivotally mounted the support arm (6), said shaft being hollow.
9. Laminoir selon l'une des revendications 1 à 8, dans lequel ladite au moins une buse (12') est dirigée de telle façon que le jet soit dirigé sur le cylindre intermédiaire (3), à proximité de la zone de contact (Z) entre le cylindre de travail (2) et le cylindre intermédiaire (3), et de telle façon qu'entraîné par le cylindre intermédiaire, le fluide du jet arrive jusqu'au cylindre de travail (2). 9. Rolling mill according to one of claims 1 to 8, wherein said at least one nozzle (12 ') is directed in such a way that the jet is directed on the intermediate cylinder (3), close to the contact zone ( Z) between the working cylinder (2) and the intermediate cylinder (3), and in such a way that driven by the intermediate cylinder, the jet fluid reaches the working cylinder (2).
10. Laminoir selon l'une des revendications 1 à 9, dans lequel ladite au moins une buse (12) est dirigée de telle façon que le jet soit dirigé directement sur la bande à laminer et de telle façon que le jet glisse sur la bande à laminer en direction du cylindre de travail correspondant (2). 10. Rolling mill according to one of claims 1 to 9, wherein said at least one nozzle (12) is directed such that the jet is directed directly on the strip to be rolled and so that the jet slides on the strip rolling to the corresponding work roll (2).
11. Procédé de refroidissement d'un laminoir selon la revendication 10, dans lequel on arrose le cylindre de travail grâce à au moins une buse (12), le jet de la buse étant suffisamment puissant pour atteindre ledit cylindre de travail (2) en glissant sur la bande à laminer (B), à contre courant du sens de défilement de la bande à laminer. 11. A method of cooling a rolling mill according to claim 10, wherein the working roll is watered by at least one nozzle (12), the jet of the nozzle being strong enough to reach said working roll (2). sliding on the strip to be rolled (B) against the direction of travel of the strip to be rolled.
EP14790138.3A 2013-07-22 2014-07-17 Rolling mill provided with at least one cooling nozzle Active EP3024602B1 (en)

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FR1357186A FR3008633B1 (en) 2013-07-22 2013-07-22 ROLLER EQUIPPED WITH AT LEAST ONE COOLING NOZZLE
PCT/FR2014/051834 WO2015011373A1 (en) 2013-07-22 2014-07-17 Rolling mill provided with at least one cooling nozzle

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EP3024602B1 EP3024602B1 (en) 2017-07-05

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EP (1) EP3024602B1 (en)
CN (1) CN105531044B (en)
ES (1) ES2635298T3 (en)
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FR3077015B1 (en) * 2018-01-25 2020-01-24 Fives Dms ROLLER WITH COOLING OR LUBRICATING DEVICE
FR3078494B1 (en) * 2018-03-05 2021-12-17 Fives Dms LAMINATION PROCESS WITH STEP FOR ADJUSTING THE INTERSPACE BETWEEN THE SIDE SUPPORT CYLINDER AND THE SUPPORT CYLINDER

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US6041636A (en) 1998-02-20 2000-03-28 T. Sendzimir, Inc. Side supported 6-high rolling mill
DE10257971A1 (en) * 2002-12-12 2004-06-24 Sms Demag Ag Sheet metal strip cold rolling mill has contact rollers which may be displaced left or right in accordance with the metal strip running direction
US7185522B2 (en) 2005-05-10 2007-03-06 T. Sendzimir, Inc. Side supported 6-high rolling mill
KR100987527B1 (en) * 2007-03-14 2010-10-13 가부시키가이샤 아이에이치아이 Switchable multistage rolling mill
JP5428173B2 (en) * 2008-03-21 2014-02-26 株式会社Ｉｈｉ Rolling mill and rolling method
US8966951B2 (en) * 2009-02-02 2015-03-03 Siemens Vai Metals Technologies Sas Spraying method and device for a rolling plant
KR101591563B1 (en) 2010-03-03 2016-02-03 지멘스 바이 메탈스 테크놀로지 에스에이에스 Roll stand
EP2676744A1 (en) * 2012-06-22 2013-12-25 Siemens VAI Metals Technologies GmbH Device for sprinkling a rolling plant and method for extracting/inserting said system from/in said rolling cage

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FR3008633B1 (en) 2015-08-07
WO2015011373A1 (en) 2015-01-29
TW201505731A (en) 2015-02-16
TWI617370B (en) 2018-03-11
US10173252B2 (en) 2019-01-08
FR3008633A1 (en) 2015-01-23
US20160167097A1 (en) 2016-06-16
EP3024602B1 (en) 2017-07-05
ES2635298T3 (en) 2017-10-03
CN105531044A (en) 2016-04-27
CN105531044B (en) 2017-11-07

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