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)
• Bearings For Parts Moving Linearly (AREA)
• Rolling Contact Bearings (AREA)

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Publications (2)

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• 2013
  • 2013-07-22 FR FR1357186A patent/FR3008633B1/fr not_active Expired - Fee Related
• 2014
  • 2014-07-17 ES ES14790138.3T patent/ES2635298T3/es active Active
  • 2014-07-17 US US14/906,804 patent/US10173252B2/en active Active
  • 2014-07-17 WO PCT/FR2014/051834 patent/WO2015011373A1/fr active Application Filing
  • 2014-07-17 EP EP14790138.3A patent/EP3024602B1/de active Active
  • 2014-07-17 CN CN201480049467.3A patent/CN105531044B/zh active Active
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