EP3743223B1 - Walzwerk mit kühl- oder schmiervorrichtung - Google Patents

Walzwerk mit kühl- oder schmiervorrichtung Download PDF

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Publication number
EP3743223B1
EP3743223B1 EP19710005.0A EP19710005A EP3743223B1 EP 3743223 B1 EP3743223 B1 EP 3743223B1 EP 19710005 A EP19710005 A EP 19710005A EP 3743223 B1 EP3743223 B1 EP 3743223B1
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EP
European Patent Office
Prior art keywords
support
rolling mill
actuator
hollow connector
cage
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Application number
EP19710005.0A
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English (en)
French (fr)
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EP3743223A1 (de
Inventor
Conrad ERNST DE LA GRAETE
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Fives DMS SA
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Fives DMS SA
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Publication of EP3743223A1 publication Critical patent/EP3743223A1/de
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Classifications

    • 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
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls
    • 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
    • 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
    • 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
    • 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
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems

Definitions

  • the invention relates to a rolling mill, and relates more particularly to the aspect of cooling and/or lubricating the rolls of such a rolling mill.
  • the field of the invention is more particularly that of laterally supported Sexto cage rolling mills, and in particular the rolling mills known under the name “ Z High ” .
  • rolling mills find their application, in line, for example, in pickling annealing lines or, offline, as reversible rolling mills, for metal strip.
  • a Quarto stand rolling mill comprises a holding stand in which are provided four cylinders with parallel axes, i.e. respectively two working rolls, lower and upper, defining the air gap for the passage of the strip to be rolled, as well as two support, upper and lower, bearing respectively on the work rolls on the side opposite to that of the passage gap.
  • a Sexto rolling mill comprises two additional rolls compared to a Quarto, namely two intermediate rolls interposed respectively between each working roll and the corresponding support roll.
  • each support roll and each intermediate roll is rotatably mounted at its ends on chocks, via bearings, for example bearings or even hydrostatic bearings.
  • These chocks are supports which can be moved in a direction parallel to the clamping plane, between the two uprights of the stand.
  • balancing cylinders allow the movement of the chocks of the intermediate rolls. These balancing cylinders make it possible to change the relative position of the chocks and their cylinder, making it possible, among other things, to open the stand to facilitate the engagement of the product to be rolled, or even to move these elements to facilitate the dismantling of the cylinders. These balancing cylinders can also make it possible to arch the intermediate cylinders.
  • Sexto stand rolling mill An advantage of a Sexto stand rolling mill is the possibility of using, in comparison with a Quarto stand, work rolls of smaller diameter, which allows to obtain a greater reduction in thickness of the product to be rolled, for the same rolling force.
  • a Sexto rolling mill also offers the possibility of axially shifting the two intermediate rolls, and in order to apply the rolling force only over the width of the strip to be rolled, and not over the entire length of the working rolls.
  • a Sexto rolling mill called “ laterally supported ", very often, the work rolls are not mounted on chocks, but on the contrary 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. other side of the clamping plane.
  • Each work roll is supported laterally, on either side of the work roll, by two pairs of rollers.
  • the rollers of the same pair are provided at the two ends of each working roll, at the ends of the roll which are not in contact with the strip to be rolled.
  • the rollers are pivotally mounted on forks that move in translation relative to the upright of the cage, under the action of hydraulic cylinders.
  • nozzles on board the support part of the rollers, movable relative to the upright of the cage.
  • flexible hoses are used to supply the nozzles with cooling and/or lubricating products, the flexible hoses making it possible to take account of the displacements between the mobile support part and the uprights of the cage.
  • These nozzles allow the lubrication and cooling of the rollers and of the working cylinder, at the level of the support zone of the rollers.
  • the support rolls and the intermediate rolls are mounted at their ends on chocks, while the working rolls are provided floating.
  • Each work roll is supported laterally, on each side of the work roll, by a lateral support roll, itself resting on two series of rollers arranged along the length of the roll.
  • each working roll the two corresponding side support rolls are secured to the two chocks of said intermediate roll.
  • Each lateral support cylinder, as well as 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. .
  • intermediate cylinder assembly intermediate cylinder chocks, 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 sliding the assembly in the direction of the cylinders.
  • 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 so-called preload beam, movable in translation with respect to the corresponding force distribution beam, movable towards the inside of the cage in a substantially horizontal direction.
  • Preload cylinders make it possible to force the movable beam into contact with the pivoting support arm to preload the lateral support cylinder on the working cylinder.
  • the cooling and the lubrication of the working roll and of the intermediate roll are carried out by means of nozzles, marked respectively 73 and 72 on the figure 2 of the document US 4,531,394 , physically remote from the working cylinder, located outside the " insert " or the " cassette ".
  • these nozzles are secured to the force distribution beam, or even to the mobile preload beam. So that the jet can reach the intermediate cylinder, the nozzles, marked 72, face bores passing through the support arms. In practice and to the knowledge of the inventors, this solution of sprinkling via the bores of the support arms does not seem to be retained in the rolling mills implemented industrially.
  • the spray nozzles, marked 73 are unable to properly cool the working roller because they are located too far from it, their jets coming too quickly into interference with the side support arms, rollers and rollers. lateral supports and therefore unable to reassemble the scrolling of the band.
  • the nozzles marked 72 are unable to properly lubricate the contact between the working roller and the intermediate cylinder because they are located too far from the latter. In use, such insert rolling mills have a limited lifetime for the working roll, due to its poor cooling.
  • the chocks of the intermediate rolls are mounted on bending blocks.
  • the cylinders of the bending blocks make it possible, during operation, to bring the intermediate cylinders closer together, in a working position illustrated in figure 5 of this document, or even to separate the intermediate cylinders to a position, illustrated in figure 4 , allowing the inserts to be removed by sliding.
  • These jacks can also make it possible, in operation, to arch the intermediate cylinder.
  • connection/disconnection devices make it possible, in the working position of the cylinders, to connect the source of lubricant to the lubrication bores provided in the chocks, and to automatically disconnect the bores when the intermediate cylinders and their chocks are separated vertically by the bending blocks.
  • This automatic connection/disconnection is advantageous. No additional operation to connect/disconnect the source of lubricant is necessary during maintenance, in particular when the inserts must be removed or introduced into the cage.
  • each connection device comprises an element, identified 57 called “ plunge ", hollow, intended to conduct the lubricant, and which allows, in the working position of the intermediate cylinders, as illustrated in Figure 9, to join in a relatively tight manner the bore of the chock by through a seal.
  • This element is movable, vertically in translation, forced towards its sealing position by means of a spring, marked 58.
  • the lubricant flows from the source of lubricant through the element mobile and up to the bore of the insert.
  • the lubricant then flows from the bore of the chock, and to the bearings through the hollow of the shaft, marked 17, on which the support arm is pivotally mounted.
  • connection/disconnection device allows the bearings of the support arms to be lubricated.
  • this document does not address the problem of cooling the work rolls. To the knowledge of the inventors, even today the cooling of the intermediate and working rolls and the lubrication of the intermediate roll/working roll contact in a reversible rolling mill with “ inserts ” is still carried out by providing nozzles physically at a distance from the rolls.
  • the figure 2 illustrates the object of the improvement of the prior art EP 1 721 685 .
  • the rolling mill is now a one-way (non-reversible) rolling mill which comprises, upstream, in the direction of travel of the strip, a lateral support roll, as previously described, supported by a support arm. Downstream, the support arm has no roller or support cylinder. This support cylinder is replaced by a pad called " support pad " which can be made of bronze or a self-lubricating graphite material, intended to slide on the surface of the working roller, without exerting substantial effort on the latter.
  • This skid support arm embeds several nozzles for a cooling liquid which allow the working roller to be cooled directly, 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 convey the lubricant to the bearings of the rollers supporting the side support cylinder.
  • This document thus teaches how to improve the cooling of the work rolls. However, this improvement is made to the detriment of the support of the working roll on one of its sides, by removing a lateral support roll and replacing it with a pad, the rolling mill then no longer being a reversible rolling mill.
  • the nozzles are positioned on the supports of the side support cylinders in order to spray the working cylinder directly from both sides, laterally.
  • the real difficulty in improving the spraying of work rolls and intermediate rolls in a cassette mill is not to place the nozzles in the cassette, but to know how to supply them with lubricating/cooling fluid, and without increasing the maintenance time during the operations of removing or inserting the cassette into the rolling mill stand.
  • the document US.6,041,636 discloses automatic connection devices allowing, in the working position of the rolls, to connect the source of lubricant to lubricating bores provided in the chocks, and to automatically disconnect the bores when the intermediate rolls are moved apart vertically by the bending blocks .
  • a device can only be used to supply lubricant, either solely to the bearings of the rollers of the lateral support cylinder of a support arm, or solely to supply fluid to the nozzles of a support arm. This is the reason why the nozzle support arm does not have a side support cylinder in the document EP 1 721 685 , this being replaced by a pad which does not require a bearing to be lubricated.
  • connection device in this prior art is connected to the chocks, which makes it necessary to convey the fluid along a complex trajectory via the hollow shaft and as far as the lower end of the support arm.
  • This complex fluid trajectory, from the chock to the support arm, via the hollow shaft, generates pressure drops, limiting flow rates.
  • the lubrication of the working cylinder is therefore obtained, indirectly, by the fact that the intermediate cylinder has been wetted and that this cylinder transports this lubrication during its rotation of a half turn, to the working cylinder .
  • this lubrication is insufficient, in particular for the cylinders placed under the band.
  • Each support arm of a side support cylinder is pivotally mounted on said axis, consisting of a shaft integral with the chocks of one of the intermediate cylinders, each intermediate cylinder, chocks of the intermediate cylinder, side support cylinders and corresponding support arms forming a self-supporting assembly, called insert (or " cassette "), which can be removed or introduced by sliding through the access window during maintenance, in the open position of the cage.
  • the hollow of the shaft can possibly be used, as in the state of the art (see US 6,041,636 ) to channel a fluid intended to lubricate the bearings of the rollers (marked 52 on the figure 1 ) laterally supporting the side support cylinder.
  • At least one of the nozzles is mounted on one of the support arms in particular to allow the lubrication/cooling of the working rolls and/or the intermediate rolls.
  • this hollow part is configured to form a sealed connection with the supply opening on the support surface in a first connection position, or on the contrary, to retract into a second disconnection position, at a distance from the surface of support.
  • the cooling fluid can be channeled from the source to said at least one nozzle marked 12 (shown) or even to said at least one nozzle marked 12' (not shown), via said connection device /disconnect.
  • the means for applying a preload force are retracted, in the retracted position, said hollow part being at a distance from the support arm.
  • This position makes it possible, in particular when the design of the rolling mill is of the insert (or cassette) type, to be able to remove or introduce the insert, without requiring additional maintenance time to disconnect/connect the source of fluid.
  • connection/disconnection device is that it is connected directly to the support arm, and not to the chocks of the intermediate cylinder as taught in the prior art known from the document 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 substantially limit the pressure drops, and thus to obtain much higher fluid flow rates than those obtained in this state of the art, and thus to substantially improve the cooling of the working rolls.
  • the solution of the document WO 2015/011373 is advantageous in that the cooling/lubrication system does not complicate the rolling mill maintenance operations, and in particular the removal of the inserts (or cassettes) from a laterally supported Sexto rolling mill, thanks to its connection/disconnection device while allowing high fluid flow rates required to ensure optimum cooling performance in that the fluid can be channeled from the hollow part to the conduct of the support arm, and without passing through the hollow of the shaft.
  • the object of the present invention is to propose a rolling mill making it possible to overcome the aforementioned drawbacks by proposing such a rolling mill whose system for cooling/lubrication of the strip or of the rolls does not complicate the maintenance operations of the rolling mill, and in particular the removal side support rolls, while allowing high fluid flow rates and which can be easily implemented on an existing rolling mill to improve the cooling of the strip and/or the rolls.
  • Another object of the present invention is to provide a rolling mill which allows effective cooling of the working rolls, even when the working roll or even the intermediate roll are of small diameter.
  • Another object of the present invention is to provide a rolling mill which allows effective cooling of the working rolls, even when the rolling mill is required to operate at high speed.
  • Another object of the present invention is to propose a process for obtaining a rolling mill in accordance with the invention from an existing rolling mill.
  • said actuator is a separate actuator from the cylinder of said means for applying a preload force.
  • said actuator is said to be the first actuator configured to deploy or retract said hollow connector in order to ensure passage from the second disconnection position to the first connection position, or vice versa, to the open position of the holding cage and in which a second actuator, independent of the first actuator (or alternatively a spring means) cooperates with said hollow connector and is configured to force said hollow connector into the first position separated from the force distribution beam when said connector hollow is in said second disconnection position.
  • the second actuator can be fixed on a support secured to the force repair beam.
  • the work rolls 2, the intermediate rolls 3 and the support rolls 4 have substantially parallel axes, the axes of the rolls 2,3,4 being contained in a clamping plane substantially perpendicular to the strip to be rolled B. Both work rolls 2 are located on either side of the strip to be rolled, their spacing defining the passage gap in operation.
  • Each intermediate cylinder 3 is interposed between the working cylinder 2 and the corresponding support cylinder 4. The work cylinder driven in rotation, indirectly by the rotation of the intermediate cylinder 3.
  • the lateral support cylinders 5 are preferably two in number per working cylinder 2 and make it possible to hold the working cylinder 2, laterally on both sides of the clamping plane. It is thus preferably a reversible rolling 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 as than taught by the document US 4,531,394 or the document US 6,041,636 .
  • each intermediate roll 3, chocks of the intermediate roll, side support rolls 5 and corresponding support arms 6 form a self-supporting assembly, commonly called " insert " or " cassette”, which can be removed or introduced by sliding at the through the access window during maintenance, at least in an open position Po of the retaining cage for which the upper insert Isup and the lower Iinf are separated from each other, typically at means of the balancing cylinders of the rolling mill.
  • the force distribution beams 8 extend between the corresponding uprights of each pair, respectively opposite each support arm 6, at least during operation.
  • the means 9 for applying a preload force to each support arm 6 are intended to engage with one of the support arms at the level of a bearing surface 10, and comprise at least one preload cylinder 11 integral with one of the force distribution beams 8.
  • the position of the force distribution beam 8 can be adjusted horizontally with respect to the uprights 31.
  • the rolling mill comprises means for adjusting the horizontal position of each force distribution beam, such as an actuator 81 including screw / nut, suitable for bringing or moving the distribution beam 8 of a support arm 6 vis-à-vis.
  • This distribution beam 8 is of adjustable position typically with respect to a fixed beam 18, itself secured by its ends to two of the uprights 31 at the two ends of the cage.
  • the actuator 81 is interposed between the force distribution beam 8 and this fixed beam 18.
  • the screw/nut actuators 81 synchronized can be provided to bring the force distribution beam closer to the support arm 6, or on the contrary move away the force distribution beam 8 of said support arm 6.
  • the work roll is generally forced to press the lateral support roll 5 upstream, in the running direction of the strip B.
  • the force distribution beam 8, downstream is positioned a few millimeters from the arm support 6, downstream.
  • the means 9 for applying a preload force are then used to take up play and ensure contact with the lateral support cylinder 5, downstream.
  • the rolling mill comprises said spray nozzle or 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 is mounted on one of the support arms 6, in particular to allow the lubrication/cooling of the working rolls and/or the intermediate rolls.
  • the hollow connector 16 is capable of making a sealed connection with the supply opening 15 on the outer surface 10 in a first connection position P1, or on the contrary, retracting into a second disconnection position. , at a distance from the outer surface 10.
  • the cooling fluid can be channeled from the source to said at least one nozzle marked 12 via said connection/disconnection device 13.
  • the actuator 17 in the retracted position said hollow connector 16 is at a distance from the support arm 6. This position makes it possible, in particular when the design of the rolling mill is of the insert (or cassette) type, to be able to withdraw or introduce the insert , without requiring additional maintenance time to disconnect/connect the fluid source.
  • connection/disconnection device is that it is connected directly to the support arm, and not to the chocks of the intermediate cylinder as taught in the prior art known from the document 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 can optionally be used, as in the state of the art, to channel a fluid intended to lubricate the bearings of the rollers 52 laterally supporting the lateral support cylinder 5.
  • each side support cylinder 5 is supported by rollers 52, the rollers 52 being mounted on axes 50,51, parallel, of the support arm 6 via bearings.
  • the support arm 6 comprises a lubricant supply circuit for the bearings, separate from the supply circuit of said at least one nozzle 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 nozzle supply circuit (comprising the connection/disconnection device 13) can also make it possible to convey a fluid to the bearings of the rollers 52 in order to ensure their lubrication.
  • the supply circuit comprising the connection/disconnection device 13 can be applied to any fluid requiring transit via the support arm 6 (and other than the cylinder cooling fluid).
  • said actuator 17 is a separate actuator from the cylinder 11 of said means 9 for applying a preload force.
  • the supply opening 15 may be provided on the outer surface 10 of the arm 6 in the immediate vicinity of the axis 7 of rotation of the arm.
  • An advantage of providing the actuator of the connection device 13 as a separate element from the preload cylinder is to improve the cooling of an existing rolling mill, advantageously without having to modify the force distribution beam, nor the means for applying a preload force of the existing rolling mill.
  • the hollow connector 16 may further comprise, at the connection end, a ball joint system, including a first tubular part 20 and a second tubular part 21 having hemispherical contact surfaces forming a ball joint: the first part 20 is rigidly secured to the body forming hollow connector 16, the second part 21 being free to orient itself relative to the body under stress.
  • a ball joint system including a first tubular part 20 and a second tubular part 21 having hemispherical contact surfaces forming a ball joint: the first part 20 is rigidly secured to the body forming hollow connector 16, the second part 21 being free to orient itself relative to the body under stress.
  • the second part 21 can be sized to be housed in a cavity forming a seat for the connection end of the hollow connector, in the first position P1 of the hollow connector.
  • the hollow connector 16 may be a rigid body forming a conduit having a free longitudinal end intended to be connected or disconnected to the supply opening 15 of the support arm 6, and another longitudinal end secured to the actuator 17.
  • the actuator 17 is a jack whose body of the jack is fixed to a fixed part of the holding cage such as the fixed beam 18.
  • the rod of the jack is secured to said other end of the connector 16, via a articulation 19, such as a pivot (with an axis parallel to the work cylinders), allowing free inclination of the hollow connector 16 with respect to the actuator 17.
  • each support arm 6 of a lateral support roll 5 is thus pivotally mounted on said axis 7, consisting of a shaft integral with the chocks of one of the intermediate rolls 3, each intermediate roll 3, chocks of the intermediate roll, side support rolls 5 and corresponding support arms 6 forming a self-supporting assembly.
  • the insert is called upper insert Isup when positioned above the rolling plane, or lower insert Iinf when positioned below the rolling plane.
  • these inserts Iinf and Isup can be removed or introduced by sliding through the access window during maintenance in the open position Po of the holding cage for which the upper and lower inserts Isup, Iinf are moved away from the rolling plane, typically under the action of balancing jacks.
  • the upper and lower inserts can pass towards a working position in the stand closing position Pc: the axial locking of the upper and lower inserts (Isup and Iinf) with respect to the rolling mill stand is then typically obtained during the closing of the holding stand, during the movement of the lower and upper inserts from their separated position in the open position of the stand Po to their close position, namely in the closed position Pc of the stand of the rolling mill, and so well known to those skilled in the art.
  • connection device is configured so that the passage from the second disconnection position to the first connection position P1 is obtained under the action of the deployment of the actuator 17 in the open position. Po of the cage in the open position of the lower and upper inserts (open position shown in figure 1 Where 2 ).
  • the hollow connector 16, (or even said actuator 17) of the connection device are articulated and configured in such a way that said hollow connector 16, or even said actuator 17 accompany the movement of the support arm 6 to which said hollow connector 16 is connected (according to the first connection position) from the open position Po of the rolling mill holding stand to the closed position Pc of the stand, said hollow connector 16 then passing from a spaced position Pe from the force distribution beam 8 (see picture 2 ) to a close position Pr of the force distribution beam 8 (see Figure 3 ).
  • the hollow connector(s) 16 associated with the upper insert Isup, or even those associated with the lower insert Iinf, can be fitted with second actuators 23. These second actuators 23 are used to hold the hollow connectors 16 in their separated position Pe, in particular when the hollow connectors 16 are in the second disconnection position (ie not linked to the insert).
  • the actuator 17, namely the first actuator is thus configured to deploy or retract said hollow connector 16 in order to ensure passage from the second disconnection position to the first connection position P1, or vice versa, to the open position Po of the retaining cage, the hollow connectors 16 then in their separated position Pe.
  • the second actuator 23 is an actuator independent of the first actuator 17 which cooperates with said hollow connector 16 and is configured to force said hollow connector 16 into the first position Pe separated from the force distribution beam during connection.
  • the second actuator 23 When the cage is closed, the second actuator 23 is in a state allowing free movement of the hollow connector then connected to the arm of the insert, when the insert moves towards its working position.
  • the second actuator 23 can be fixed on a support secured to the force distribution beam 8.
  • the (or each) second actuator 23 can be provided to accompany the movements of the hollow connector 16 associated with the upper insert Isup to force the hollow connector 16 upwards into the separated position Pe, against gravity.
  • the second actuator 23 can still be replaced by a spring means (leaf spring, torsion spring, pneumatic spring, etc.) whose return force constrains the hollow connector 16 from the close position towards the split position Pe.
  • the lower insert Iinf may not have such a second actuator (or spring means), in that gravity naturally forces the hollow connector(s) 16 associated with the lower insert downwards, and therefore towards its separated position Pe.
  • the supply circuit may comprise a hose (not shown) connected to a fluid inlet 24 of the hollow connector 16.
  • the fluid arrives from the source, passes through the hose to the inlet 24 then flows into pipe 21, through along hollow connector 16, until it reaches supply opening 15. From this opening, the fluid flows into support arm 6 at the through the pipe 14 to said at least one nozzle 12 which can be fixed to the support of the rollers 52, or even said at least one nozzle 12 which can be fixed directly to the body of the support arm 6.
  • a plurality of nozzles 12 can 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 onto the strip to be rolled, and not directly onto the work roll, and in such a way that the jet slides over the strip to be rolled in direction of the work cylinder 2.
  • Such an orientation of the nozzles 12 advantageously makes it possible to effectively cool the working cylinder when the working cylinder and the intermediate cylinder are of small diameter and prevent spraying the working cylinder directly.
  • This orientation of said at least one nozzle 12 makes it possible to cool the working roll, even when the jet is sprayed against the current of the running direction of the strip to be rolled, as illustrated in figure 2 .
  • said at least one nozzle 12 can be directed in such a way that the jet is directed onto 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 so 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 and thus to spray the intermediate cylinder 3, as close as possible to this zone, and not only at the level of the zone of contact of the support cylinder 4/intermediate cylinder 3.
  • the intermediate cylinder 3 is driven in rotation at high speed, the major part of the fluid of the jet reaches the working cylinder 2, whatever the action of the centrifugal force .
  • Such nozzles 12 can 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 are provided on the four support arms, a connection/disconnection device being provided between each support arm and the corresponding force distribution beam.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (13)

  1. Walzwerk (1), das umfasst:
    - ein Haltegerüst (30), das zwei Paare von Ständern (31), die voneinander beabstandet sind, an den zwei Enden des Gerüsts umfasst, wobei mindestens zwei Ständer eines gleichen Paares ein Zugangsfenster definieren,
    - zwei Arbeitswalzen (2), die dazu geeignet sind, ein zu walzendes Band einzuspannen, zwei Stützwalzen (4) und zwei Zwischenwalzen (3), wobei die Stützwalzen (4) und die Zwischenwalzen (3) an ihren Enden auf Einbaustücken drehend montiert sind,
    - seitliche Stützwalzen (5), die dazu geeignet sind, die Arbeitswalzen (2) seitlich zu stützen, wobei jede seitliche Stützwalze von einem Tragarm (6), der schwenkend auf eine Achse (7) montiert ist, getragen wird,
    - Kraftverteilungsbalken (8), die sich zwischen den entsprechenden Ständern jedes Paares erstrecken, und Mittel (9) zum Anlegen einer Vorspannkraft auf jedem Tragarm (6), die dazu bestimmt sind, in einen der Tragarme im Bereich einer Stützoberfläche (10) einzugreifen, und die mindestens einen Vorspannzylinder (11), der fest mit einem der Kraftverteilungsbalken (8) verbunden ist, umfassen,
    - eine oder mehrere Sprühdüsen für ein Schmier-/Kühlfluid, und wobei mindestens eine der Düsen (12) auf einem der Tragarme (6) mitgeführt ist, und wobei der Fluidversorgungskreislauf der mindestens einen Düse (12) eine Verbindungs-/Trennvorrichtung (13) umfasst, die umfasst:
    - eine Leitung (14) des Tragarms (6), die dazu bestimmt ist, das Fluid zu kanalisieren, die eine Versorgungsöffnung (15) aufweist, die auf der Außenoberfläche des Tragarms, die sich auf der Seite der Mittel (9) zum Anlegen einer Vorspannkraft befindet, mündet,
    - einen Hohlsteckverbinder (16), der in Bezug auf das Haltegerüst (30) beweglich ist, der unter der Einwirkung eines Aktuators (17) verlagerbar ist, der dazu geeignet ist, eine dichte Verbindung mit der Versorgungsöffnung (15) auf der Außenoberfläche (10) in einer ersten Verbindungsposition (P1) herzustellen oder vielmehr in eine, von der Außenoberfläche (10) entfernte, zweite Trennposition einzufahren,
    dadurch gekennzeichnet, dass der Aktuator (17) ein Aktuator ist, der von dem Zylinder (11) der Mittel (9) zum Anlegen einer Vorspannkraft getrennt ist.
  2. Walzwerk nach Anspruch 1, wobei das Verbindungsende des Hohlsteckverbinders (16) und der Sitz um die Versorgungsöffnung (15), der dazu bestimmt ist, das Verbindungsende stützend aufzunehmen, komplementäre Reliefs, die ineinander eingreifen, umfassen, die jedes relative Gleiten des Verbindungsendes des Hohlsteckverbinders (16) und des Sitzes in der ersten Verbindungsposition (P1) unterbinden.
  3. Walzwerk nach Anspruch 2, wobei der Hohlsteckverbinder (16) in Bezug auf den Aufbau des Gerüsts schwimmend vorgesehen ist, der die Bewegungen des Tragarms (6) bei Walzvorgängen in der ersten Verbindungsposition (P1) begleiten kann, wobei der Hohlsteckverbinder (16) dazu ausgelegt ist, in Bezug auf das Gerüst des Walzwerks angelenkt zu sein, um es dem Verbindungsende des Hohlsteckverbinders (16) zu ermöglichen, den Bewegungen des Tragarms (6) zu folgen.
  4. Walzwerk nach einem der Ansprüche 1 bis 3, wobei der Hohlsteckverbinder (16) ein starrer Körper ist, der eine Leitung bildet, die ein freies Längsende aufweist, das dazu bestimmt ist, mit der Versorgungsöffnung (15) des Tragarms (6) verbunden oder davon getrennt zu sein, wobei das andere Längsende fest mit dem Aktuator (17) verbunden ist.
  5. Walzwerk nach Anspruch 4, wobei der Aktuator (17) ein Zylinder ist, dessen Zylinderkörper an einem feststehenden Gerüstteil befestigt ist, und der Schaft des Zylinders fest mit dem anderen Ende des Hohlteils (16) über ein Gelenk (19) verbunden ist.
  6. Walzwerk nach Anspruch 4 oder 5, wobei der Hohlsteckverbinder (16) an dem Verbindungsende ein Gelenksystem umfasst, einschließlich eines ersten rohrförmigen Teils (20) und eines zweiten rohrförmigen Teils (21), die halbkugelförmige Kontaktoberflächen aufweisen, wobei das erste Teil (20) starr mit dem Körper, der den Hohlsteckverbinder (16) bildet, verbunden ist, wobei sich das zweite Teil (21) frei in Bezug auf den Körper des Hohlsteckverbinders (16) ausrichten kann.
  7. Walzwerk nach einem der Ansprüche 1 bis 6, das Einstellmittel der horizontalen Position jedes Kraftverteilungsbalkens (8) wie einen Schraube-/Mutter-Aktuator (81) umfasst, der dazu geeignet ist, den Verteilungsbalken (8) eines Tragarms (6) in Gegenüberlage anzunähern oder zu entfernen, wobei der Verteilungsbalken eine Position aufweist, die in Bezug auf einen stationären Balken (18), der fest an seinen Enden mit zweien der Ständer an den zwei Enden des Gerüsts verbunden ist, einstellbar ist, und wobei der Aktuator (17) an dem stationären Balken (18) befestigt ist und den stationären Balken (18) und den Hohlsteckverbinder (16) verbindet.
  8. Walzwerk nach einem der Ansprüche 1 bis 7, wobei jeder Tragarm (6) einer seitlichen Stützwalze (5) schwenkend auf der Achse (7) montiert ist, die aus einer Welle besteht, die fest mit Einbaustücken einer der Zwischenwalzen (3) verbunden ist, wobei jede Zwischenwalze (3), die Einbaustücke der Zwischenwalze, die seitlichen Stützwalzen (5) und die entsprechenden Tragarme (6) eine selbsttragende Einheit, Einsatz genannt, bilden,
    wobei das Walzwerk einen unteren Einsatz (Iinf) und einen oberen Einsatz (Isup) umfasst, wobei die Einsätze durch Gleiten durch das Zugangsfenster bei der Wartung in einer offenen Position (Po) des Haltegerüsts, für die der obere und der untere Einsatz (Isup, Iinf) von der Walzebene abgespreizt sind, herausgezogen oder eingeführt werden können, wobei der obere Einsatz und der untere Einsatz (Isup, Iinf) von einer Arbeitsposition in eine Gerüstschließposition (Pc) übergehen können,
    und wobei die Verbindungsvorrichtung derart ausgelegt ist, dass der Übergang von der zweiten Trennposition zu der ersten Verbindungsposition (P1) unter der Einwirkung des Ausfahrens des Aktuators (17) in Öffnungsposition (Po) des Gerüsts in der abgespreizten Position des unteren und des oberen Einsatzes erhalten wird,
    und wobei der Hohlsteckverbinder (16) bzw. der Aktuator (17) der Verbindungsvorrichtung angelenkt und derart ausgelegt sind, dass der Hohlsteckverbinder (16) bzw. der Aktuator (17) die Bewegung des Tragarms (6), mit dem der Hohlsteckverbinder (16) verbunden ist, von der Öffnungsposition (Po) des Gerüsts zu der Schließposition (Pc) des Gerüsts begleiten, wobei der Hohlsteckverbinder (16) von einer abgespreizten Position (Pe) des Kraftverteilungsbalkens (8) zu einer angenäherten Position (Pr) des Kraftverteilungsbalkens (8) übergeht.
  9. Walzwerk nach Anspruch 8, wobei der Aktuator (17) ein erster Aktuator ist, der dazu ausgelegt ist, den Hohlsteckverbinder (16) auszufahren oder einzufahren, um den Übergang von der zweiten Trennposition zu der ersten Verbindungsposition (P1) oder umgekehrt in der Öffnungsposition (Po) des Haltegerüsts sicherzustellen, und wobei ein zweiter von dem ersten Aktuator (17) unabhängiger Aktuator (23) oder auch ein Federmittel mit dem Hohlsteckverbinder (16) zusammenwirkt und dazu ausgelegt ist, den Hohlsteckverbinder (16) in die erste abgespreizte Position (Pe) des Kraftverteilungsbalkens zu zwingen, wenn der Hohlsteckverbinder (16) in der zweiten Trennposition ist.
  10. Walzwerk nach Anspruch 9, wobei der zweite Aktuator (23) auf einem Träger, der fest mit dem Kraftverteilungsbalken (8) verbunden ist, befestigt ist.
  11. Walzwerk nach einem der Ansprüche 1 bis 10, wobei jede seitliche Stützwalze (5) von Stützrollen getragen wird, wobei die Stützrollen auf Achsen (50, 51) der Tragarme (6) über Lager montiert sind, und wobei der Tragarm (6) einen Schmiermittelversorgungskreislauf, der von dem Versorgungskreislauf der mindestens einen Düse (12) getrennt ist, für die Lager umfasst.
  12. Walzwerk nach Anspruch 11, wobei der Schmiermittelversorgungskreislauf für die Lager die Welle umfasst, auf der der Tragarm (6) schwenkend montiert ist, wobei die Welle hohl ist.
  13. Verfahren zum Erhalten eines Walzwerks nach einem der Ansprüche 1 bis 12, ausgehend von einem existierenden Walzwerk, das umfasst:
    - ein Haltegerüst (30), das zwei Paare von Ständern (31), die voneinander beabstandet sind, an den zwei Enden des Gerüsts umfasst, wobei mindestens zwei Ständer eines gleichen Paares ein Zugangsfenster definieren,
    - zwei Arbeitswalzen (2), die dazu geeignet sind, ein zu walzendes Band einzuspannen, zwei Stützwalzen (4) und zwei Zwischenwalzen (3), wobei die Stützwalzen (4) und die Zwischenwalzen (3) an ihren Enden auf Einbaustücken drehend montiert sind,
    - seitliche Stützwalzen (5), die dazu geeignet sind, die Arbeitswalzen (2) seitlich zu stützen, wobei jede seitliche Stützwalze von einem Tragarm (6), der schwenkend auf eine Achse (7) montiert ist, getragen wird,
    - Kraftverteilungsbalken (8), die sich zwischen den entsprechenden Ständern jedes Paares erstrecken, und Mittel (9) zum Anlegen einer Vorspannkraft auf jedem Tragarm (6), die dazu bestimmt sind, in einen der Tragarme im Bereich einer Stützoberfläche (10) einzugreifen, und die mindestens einen Vorspannzylinder (11), der fest mit einem der Kraftverteilungsbalken (8) verbunden ist, umfassen,
    - eine oder mehrere Sprühdüsen für ein Schmier-/Kühlfluid, Verfahren, wobei die Verbindungs-/Trennvorrichtung (13) an dem existierenden Walzwerk durch Umsetzen der folgenden Schritte hinzufügt wird:
    - Ersetzen der gesamten oder eines Teils der existierenden Tragarme des Walzwerks durch Arme, die die mindestens eine der Düsen (12) mitführen und die Leitung (14) umfassen, die eine Versorgungsöffnung (15) aufweist, die auf der Außenoberfläche mündet, auf einem der Tragarme (6) mitgeführt ist,
    - Hinzufügen des Hohlsteckverbinders (16), der in Bezug auf das Haltegerüst (30) beweglich ist, sowie des Aktuators (17), gegebenenfalls des ersten Aktuators, für die Verlagerung des Hohlsteckverbinders, der dazu geeignet ist, eine dichte Verbindung mit der Versorgungsöffnung (15) auf der Außenoberfläche (10) in der ersten Verbindungsposition herzustellen oder vielmehr in die von der Außenoberfläche (10) entfernte, zweite Trennposition einzufahren, und gegebenenfalls des zweiten Aktuators (23), der von dem ersten Aktuator (17) unabhängig ist, der mit dem Hohlsteckverbinder (16) zusammenwirkt und dazu ausgelegt ist, den Hohlsteckverbinder (16) in die erste abgespreizte Position (Pe) des Kraftverteilungsbalkens zu zwingen.
EP19710005.0A 2018-01-25 2019-01-23 Walzwerk mit kühl- oder schmiervorrichtung Active EP3743223B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1850594A FR3077015B1 (fr) 2018-01-25 2018-01-25 Laminoir avec dispositif de refroidissement ou lubrification
PCT/FR2019/050148 WO2019145639A1 (fr) 2018-01-25 2019-01-23 Laminoir avec dispositif de refroidissement ou lubrification

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EP3743223A1 EP3743223A1 (de) 2020-12-02
EP3743223B1 true EP3743223B1 (de) 2022-03-02

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US (1) US11420244B2 (de)
EP (1) EP3743223B1 (de)
CN (1) CN111727088B (de)
ES (1) ES2920450T3 (de)
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WO (1) WO2019145639A1 (de)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531394A (en) 1982-03-26 1985-07-30 T. Sendzimir, Inc. Six-high rolling mills
DE3323641A1 (de) 1983-04-02 1984-10-04 SMS Schloemann-Siemag AG, 4000 Düsseldorf Mehrwalzengeruest
US6041636A (en) 1998-02-20 2000-03-28 T. Sendzimir, Inc. Side supported 6-high rolling mill
US7185522B2 (en) * 2005-05-10 2007-03-06 T. Sendzimir, Inc. Side supported 6-high rolling mill
CN102300650B (zh) * 2009-02-02 2014-03-05 西门子Vai金属科技有限公司 轧制设备的喷淋方法和装置
EP2676744A1 (de) * 2012-06-22 2013-12-25 Siemens VAI Metals Technologies GmbH Sprinklervorrichtung einer Walzanlage, und Extraktions-/Einführmethode dieses Systems aus einem/in ein entsprechendes Walzgerüst
FR3008633B1 (fr) * 2013-07-22 2015-08-07 Fives Dms Laminoir equipe d'au moins une buse de refroidissement
FR3023192B1 (fr) * 2014-07-01 2016-08-05 Fives Dms Laminoir tel que par exemple laminoir a froid

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EP3743223A1 (de) 2020-12-02
FR3077015B1 (fr) 2020-01-24
CN111727088A (zh) 2020-09-29
CN111727088B (zh) 2022-07-26
US20210060631A1 (en) 2021-03-04
ES2920450T3 (es) 2022-08-04
WO2019145639A1 (fr) 2019-08-01
FR3077015A1 (fr) 2019-07-26
US11420244B2 (en) 2022-08-23

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