EP2542360B1 - Walzgerüst - Google Patents

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Publication number
EP2542360B1
EP2542360B1 EP10720276.4A EP10720276A EP2542360B1 EP 2542360 B1 EP2542360 B1 EP 2542360B1 EP 10720276 A EP10720276 A EP 10720276A EP 2542360 B1 EP2542360 B1 EP 2542360B1
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EP
European Patent Office
Prior art keywords
roll stand
side bearing
lateral support
rollers
bearing unit
Prior art date
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Active
Application number
EP10720276.4A
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English (en)
French (fr)
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EP2542360A1 (de
Inventor
Bernard Rossigneux
Yves Guillot
Francis Charre
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.)
Clecim SAS
Original Assignee
Siemens VAI Metals Technologies SAS
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Priority to EP10720276.4A priority Critical patent/EP2542360B1/de
Publication of EP2542360A1 publication Critical patent/EP2542360A1/de
Application granted granted Critical
Publication of EP2542360B1 publication Critical patent/EP2542360B1/de
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    • 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
    • B21B13/14—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Definitions

  • the present invention relates to a rolling stand that can equip a rolling installation, according to the preambles of claims 1 and 15, which are based on the document WO 2004/052568 .
  • the present invention relates in particular to the field of rolling metal strips, especially special steels such as stainless steels, using a rolling installation generally comprising at least one rolling stand. More particularly, the present invention relates to a rolling stand of said rolling installation and its operation, said cage being intended for rolling any type of metal, and in particular for rolling stainless steels.
  • a rolling stand is equipped with two vertically superposed working rolls, each having their longitudinal axis of rotation parallel to the running plane of the metal strip and placed in the same clamping plane substantially perpendicular to the running direction of the band between said working rolls.
  • the working rolls are generally pressed against each other by a pair of support rollers each having their longitudinal axis in said same clamping plane (or in the vicinity of said clamping plane), and between which is applied pressure - or effort - rolling.
  • Such a rolling plant comprising a rolling stand formed of four vertically superimposed rolls, or two small diameter working rolls pressed against each other by two larger diameter bearing rolls, is called "quarto". ".
  • the roll stand is then formed of six cylinders superimposed vertically one above the other, ie a pair of working rolls enclosing the strip to be rolled, framed by a first pair of rolls formed by the intermediate rolls, themselves framed by a second pair of rolls formed by the support rolls.
  • a rolling mill characterized by such a roll arrangement is usually referred to as "sexto" or "6-high”.
  • a roll stand of a sexto-type rolling mill may comprise lateral supports of the working rolls.
  • each of the working cylinders is in contact on both sides of the clamping plane with a lateral support member, comprising for example a lateral support cylinder itself supported laterally by two rows of support rollers. side mounted side by side.
  • the sexto rolling mills comprising said lateral support members are generally referred to as laterally supported sexto-type rolling mills.
  • the cylinders bear against each other along substantially parallel bearing lines and directed along a generatrix whose profile, normally rectilinear, depends on the forces applied and the strength of the cylinders.
  • the diameter of these working rolls is such that it is impossible to drive them directly, as is usual for cylinders of larger diameter, for example using extensions transmitting at one of their ends the rolling torque from a motorcycle gearbox assembly.
  • the transmission of the torque is then ensured, in the case of these small diameter working rolls, by friction on the intermediate rolls which are themselves driven by a gear motor assembly.
  • This friction transmission generates between the working cylinder and the intermediate cylinder a tangential force proportional to the transmitted torque. In the case of rolls of very small diameter, this tangential force causes a longitudinal bending of the working roll leading to defects in the flatness of the rolled strip.
  • each work roll is supported, at least on the side of the entrance of the band in the grip of the working cylinders, by a lateral support cylinder, itself supported by two rows of rollers, lateral support cylinder and rollers being fixed on support arms whose position is adjustable in order to adapt to different diameters of new or worn work rolls.
  • each of the working rolls is supported laterally by a pair of lateral support rollers located on either side of the clamping plane, each of them being supported by said two rows of rollers.
  • the patent US 4,270,377 describes for example a rolling stand comprising two working rolls, each being supported on the one hand vertically by an intermediate roll itself supported by a support roll, and also, on the other hand, laterally by two support rolls lateral supported themselves by two rows of support rollers.
  • the working rolls are not supported and held in place by means of chocks, but are simply held axially by two axial roller stops.
  • each lateral support cylinder and its two rows of rollers are carried by a support arm articulated on a chock of the support cylinder and have a displacement member radial with respect to the working cylinder.
  • the chocks of the intermediate rollers are furthermore equipped with jacks intended to provide a camber of said work rolls.
  • the very small diameter of the working cylinders imposes very small values of diameters of the intermediate rolls.
  • the patent US 4,270,377 for example, an intermediate cylinder diameter of 6 inches for a working cylinder of 2.25 inches. It follows that the chocks of intermediate rolls are of reduced dimensions, which complicates the choice of a bearing capable of supporting the service loads and ensure, at the same time, a sliding relative to the trunnion of the intermediate cylinder.
  • patents US 4,531,394 and EP 0 937 517 describe a rolling stand for which each side support cylinder and its two rows of rollers are carried by a support arm articulated on the chock of the intermediate cylinder.
  • the patent EP 0 937 517 further discloses a cassette comprising an intermediate cylinder, its chocks and two lateral support cylinders respectively supported by two rows of rollers.
  • an axial displacement system by means of hydraulic cylinders allows axial movement of the intermediate cylinder.
  • Each intermediate cylinder comprises two cylindrical roller bearings without inner ring mounted in two chocks and in which its trunnions can slide axially.
  • a third chock comprises an assembly of axially fixed bearings on the end of the intermediate cylinder and which both ensures the recovery of the axial forces and the transmission of the axial movement to the intermediate cylinder.
  • the intermediate cylinders can be ground with their chocks still mounted, which has the advantage of avoiding unnecessary disassembly times.
  • each lateral support member comprising for example a lateral support cylinder and its support rollers, is secured to the intermediate cylinder, or a support of said intermediate cylinder, for example the chocks of said intermediate cylinder
  • the rectification of the intermediate cylinders with their chocks still mounted becomes impossible and accordingly, it is necessary to disassemble all the crews formed of the intermediate cylinder and its lateral support members at each rectification.
  • This latter mode of operation has the advantage of keeping the chocks of the intermediate cylinders axially fixed and of preventing any movement of the lateral support members which are fixed thereto with respect to the working rolls during axial displacement of the intermediate rolls, however, this second mode of operation has many disadvantages.
  • bearings without inner ring characterized by cylindrical rollers rolling directly on the journals of the intermediate cylinders, imposes particularly hard pins and difficult to achieve.
  • said pins have a high risk of damage in service due to wear or peeling under the pressure of the cylindrical rollers with a corresponding decrease in the service life of the intermediate rolls.
  • rolling fluids such as mineral oil, compatible with the lubrication and the absence of corrosion bearings, while other fluids, such as emulsions, would be more suitable for the needs of rolling.
  • the intermediate cylinders must on the other hand be extended by the axial displacement distance of the intermediate cylinder, which increases the cost of supply of the intermediate cylinder park.
  • such cages sometimes require the use of a third chock.
  • This third chock equipped with bearing assemblies capable of taking up axial forces, generates additional costs resulting from the need to have even longer cylinders as well as chocks and additional bearings.
  • a first drawback is interference between the working roll and the two lateral support rolls of the lateral support members during an opening of the roll stand and the subsequent vertical movement of the work rolls.
  • the general arrangement of the working cylinders and lateral support means that in the working position, the axes of rotation of the upper lateral support cylinders are located above the axis of rotation of the upper work roll and that the distance between the two lateral support cylinders, when in contact with the working cylinder, does not allow the passage of the working roll upwards, ie in the direction of the upper support roll.
  • the two lateral support rollers Before any vertical movement of the working rolls, it is therefore necessary for the two lateral support rollers to be swept apart from the work roll by a distance sufficient to avoid hindering a vertical displacement of the work roll, while guaranteeing stability side of said work roll. This spacing is achieved either by an operator, which is not reliable, or automatically, which is not guaranteed in the event of a malfunction of a control system of the rolling plant ensuring this automation.
  • a second disadvantage is interference between the working roll and the two lateral support cylinders of the lateral support members during closure of the cage and the subsequent vertical movement of the working rolls.
  • the interference between the working cylinder and the lateral support cylinders results, for example, from a bad positioning of the lateral support rollers during the maintenance of the rolling stand by an operator (position of the lateral support cylinders too closed with respect to at the position of the working cylinder) or the installation of a new working cylinder whose diameter is greater than the diameter of the working cylinder which has been replaced, or a malfunction of the rolling stand or of positioning errors of the cylinders.
  • the rolling stand comprising two working rolls capable of clamping said strip to be rolled, more specifically, an upper working roll situated above a scrolling plane of the strip to be rolled, and a lower working cylinder located below said plane of travel of the strip to be rolled, the upper and lower working rolls having their longitudinal axes of rotation in a clamping plane substantially perpendicular to the plane of scrolling of the strip to be rolled, two intermediate rolls, respectively an upper intermediate roll adapted to be in contact with the upper work roll and a lower intermediate roll capable of being in contact with the roll lower working cylinder, two support cylinders, respectively an upper support cylinder adapted to be in contact with the upper intermediate cylinder, and a lower support cylinder adapted to be in contact with the lower intermediate cylinder, the cylinders of upper and lower support being adapted to transmit a clamping force to the work rolls via the intermediate rolls, or in other words, the rolling stand comprises six vertically stacked rolls in a sextile rolling stand configuration, further comprising
  • the rolling stand comprises in particular at least two uprights able to provide vertical guidance of the support cylinders and the intermediate rolls, said two amounts being in particular not intended to directly or indirectly support the intermediate rolls and / or the lateral supports, but only to guide the support cylinders and the intermediate cylinders in a substantially vertical plane (ie substantially perpendicular to the strip of travel).
  • said bending block of the rolling stand according to the invention comprises in particular a guiding device, integral with said bending block, and adapted to support and guide said lateral support member.
  • each of the bending blocks of said rolling stand is capable of including said guide device able to guide and serve as a support for at least one of said lateral support members, so that, for example, blocks of bending supporting a same lateral support member each comprise said guide device, the latter being adapted to guide and support for example a support arm of said lateral support member.
  • the guide device according to the invention allows in particular a pivoting about an axis of rotation of said guide device, or a sliding along a path pre-defined by said guide device, said lateral support member.
  • each bending block of the rolling stand according to the invention is able to support at least one chock of an intermediate roll, and an axial displacement thereof.
  • it is not only suitable for supporting said chock, but it is also intended to support an axial displacement, for example by sliding, of said chock.
  • each bending block of the rolling stand according to the invention is in particular adapted to be moved vertically by means of at least one of said actuators.
  • eight bending blocks separated from one another are able to support the chocks of the upper and lower intermediate rolls, respectively four upper bending blocks capable of supporting the chocks of the intermediate roll.
  • upper and four lower bending blocks adapted to support the chocks of the lower intermediate cylinder.
  • the four upper bending blocks two bending blocks located at one end of the intermediate cylinder, on either side of said clamping plane, are suitable to serve as support for a chock of said intermediate cylinder, and the other two bending blocks located at the other end of said intermediate cylinder, on either side of said clamping plane, are able to serve as a support for another chock of said intermediate cylinder.
  • the four lower blocking blocks are able to serve as support, by pair of two bending blocks, each to a chock of the lower intermediate cylinder.
  • the eight bending blocks are advantageously displaceable vertically with respect to the amounts of the rolling stand, synchronized in groups of four, in particular a first group of four synchronized upper blocks and a second group of four synchronized lower blocks are each movable vertically.
  • at least one actuator for example a mechanical or hydraulic actuator, in particular adapted to be disposed between an upper bending block and a lower bending block.
  • at least one actuator is advantageously able to vertically move an upper bending block with respect to a lower bending block, said upper and lower bending blocks being arranged on both sides of the tape running plane and close. at the same end of a working cylinder.
  • each intermediate roll chock comprises in particular two protuberances intended to slide axially with a slight clearance in choke guide housings arranged in each of the bending blocks.
  • Said protuberances are for example each located on a lateral face of the chock so that the latter is able to be supported by the bending blocks located on either side of the clamping plane.
  • said protuberances are capable of rendering the slidable chock in said chocks of blocks bending in a direction parallel to the longitudinal axis of rotation of the intermediate cylinder.
  • axial displacement members are able to axially move said intermediate cylinders by displacement of the chocks of said intermediate rolls with respect to the bending blocks.
  • the rolling stand according to the invention is characterized by a device for carrying an intermediate roll comprising an axially fixed portion relative to the roll stand, namely the bending blocks, and an axially movable part with respect to said rolling stand.
  • rolling stand namely the chocks of each of said intermediate rolls.
  • Each of the upper and lower working cylinders can therefore be supported / supported laterally, on either side of the clamping plane, by lateral support members that are adjustable in position but axially fixed with respect to the rolling stand (the term axially referring to the axial direction defined by the longitudinal axis of rotation of the working or intermediate rolls).
  • each of the working rolls does not comprise a chock, but is stopped axially at each of its ends by axial stops able to maintain said working roll in an axially constant or fixed position relative to the roll stand during rolling a strip to be rolled.
  • the bending blocks, integral with the guide devices of the lateral support members that they support, are axially fixed relative to the same cage.
  • the lateral support members are able to remain axially fixed with respect to the working rolls during rolling.
  • This axial fixity does not prevent each of the lateral support members from moving radially relative to the working rolls, in particular by sliding in slide-type guiding devices, or by pivoting around a center or axis of rotation.
  • a rotary type guiding device In other words, the lateral support members are able to move in directions lying in a plane substantially perpendicular to the plane of travel of the strip to be rolled and substantially perpendicular to the axial direction defined by a longitudinal axis of rotation of the strip. an intermediate or working cylinder.
  • these same constructive arrangements also allow the guiding devices of the lateral support members to remain fixed with respect to the intermediate cylinders during a vertical displacement thereof, since during a vertical displacement of a block bending, and the lateral support members, and the chocks of the intermediate cylinder are moved simultaneously with said bending block which supports them. It follows that each lateral support member is able to follow the vertical displacement of the working roll that it supports, while maintaining the ability to move radially relative to these same working rolls.
  • each of the guiding devices of the lateral support members allows each of the guiding devices of the lateral support members to remain advantageously fixed relative to the rolling stand during disassembly of the intermediate rolls out of said rolling stand.
  • each lateral support member supported by at least one of said integral guiding devices to a bending block is able to remain axially fixed relative to the rolling stand during extraction from the rolling stand of an intermediate cylinder supported by the same block of bending.
  • disassembly of the lateral support members is unnecessary during extraction of an intermediate cylinder, and the constructive arrangements of the rolling stand according to the invention make it possible to hold in place in the rolling stand said parts of lateral supports during the extraction of the intermediate cylinders, regardless of their ability to move radially relative to the work rolls.
  • the rolling stand comprises at least one means for moving one or more lateral support members adapted to move and position said lateral support member or said lateral support members.
  • said moving means is particularly adapted to be guided by a guide member directly or indirectly secured to the amounts of the rolling stand.
  • said displacement means comprises at least one thrust member, for example a displacement actuator, mechanical or hydraulic, guided by at least one guiding member directly or indirectly integral with one or more amounts of the rolling stand and able to radially move a lateral support member relative to the working cylinder that it is able to support.
  • the displacement actuators are able to synchronously move the ends of the lateral support members, said ends being in particular intended to support one of said working rolls.
  • Said displacement actuator is for example a screw and nut device, or a wheel and worm device, or a wedge device actuating the lateral support members, directly or via a beam distribution of thrust forces.
  • the rolling stand according to the invention is characterized in that two thrust members operable in a synchronized manner by a screw device are able to act synchronously each on one end of one of said members.
  • lateral support for positioning, or according to another configuration two thrust members operable synchronously by a wedge device are adapted to act synchronously each on one end of one of said lateral support members in order to its positioning.
  • a thrust force distribution beam may be interposed between the lateral support member and at least one of its thrust members.
  • the distribution beam of the thrust forces is intercalable between a support arm of the lateral support member and its or thrust members.
  • the rolling stand according to the invention comprises at least one displacement member of an intermediate cylinder which may for example be a mechanical or hydraulic displacement actuator of said intermediate cylinder.
  • each displacement actuator of an intermediate cylinder is adapted to be guided by a guide device of the intermediate cylinder directly or indirectly secured to one or more amounts of the rolling stand and to move axially said intermediate cylinder.
  • Each of the intermediate roll guide devices allows a vertical displacement of the chocks of the intermediate rolls in line with the vertical displacement of the bending blocks supporting said chocks of the intermediate rolls.
  • the present invention gives the possibility to the chocks of the intermediate rollers to move axially by sliding in the choke guide housings arranged in the blocks of hydraulic bending and thus avoids any relative displacement of the journals relative to their bearings, while allowing a fixity of the journals relative to their bearings. It is therefore possible to use standard bearings with a high load capacity, for example four rows of rollers mounted in TQO configuration.
  • each of said intermediate rolls comprises at each of its ends a trunnion adapted to be fitted with a bearing with a high radial and axial load capacity, said bearing being suitable for be mounted in each of the chocks of said intermediate cylinders.
  • the rolling stand according to the invention is characterized in that said lateral support member comprises a lateral support cylinder and its support rollers.
  • said lateral support member according to the invention may comprise in particular at least one support arm adapted to support said lateral support cylinder and its rollers, said support arm being in particular usable as a rail or as support disassembly rail on which can roll wheels or disassembly pads fitted to the chocks of the intermediate cylinders.
  • each lateral support member is able to include a disassembly rail suitable for disassembling a cylinder intermediate.
  • the lateral support members located on either side of the clamping plane and supporting the same working cylinder each comprise said disassembly rail for disassembly of the intermediate cylinder capable of being in contact with said working cylinder, ie its extraction out of the cage, in particular by sliding of shoes or rolling of wheels equipping the chocks of said intermediate cylinder on or in said rail.
  • the rolling stand according to the invention is particularly suitable for comprising at least one oil dispenser member adapted to be mounted on at least one lateral support member support arm, in particular for supplying fluid to the nozzles able to lubricate the strip and / or the working rolls, see other rolls intended for rolling.
  • the lateral support members are integral with the bending blocks and not the chocks of the intermediate rolls, as well as able to remain in the rolling stand during extraction / disassembly and reassembly of said intermediate rolls, it is not necessary, as in EP 0 937 517 , to implement systems for automatic coupling of lubricating oil supply pipes of the cylinders and rollers of lateral support members.
  • the oil distribution members can be mounted on the support arms of the lateral support members, and powered by flexible pipes connectable to fixed feed points on the amounts of the rolling stand and allowing radial adjustment movements of the lateral support members relative to the working rolls.
  • the rolling stand according to the invention is in particular characterized in that a shim is positionable by means of a jack between one end of a support member lateral and one of said thrust members, said shim being adapted to be eclipsed.
  • two shims are positionable synchronously each between a thrust member and a lateral support member. They advantageously allow rapid disassembly of an intermediate cylinder by eclipsing said wedges, said eclipse resulting in a rapid separation of the lateral support members of the working rolls they are able to support.
  • the latter comprises eight separate hydraulic bending blocks supporting the chocks of the upper and lower intermediate rolls, respectively four upper bending blocks supporting the two chocks of the upper intermediate roll and four lower cambering blocks supporting the two chocks of the lower intermediate cylinder, said camber blocks being adapted to cooperate with mechanical or hydraulic actuators arranged between each pair of upper and lower bending blocks and ensuring a vertical displacement of said bending blocks relative to the rolling stand amounts in groups of four, a first group of four synchronized upper blocks and a second group of four synchronized lower blocks, said eight bending blocks further comprising chock guide housings in which they are able to slide or slide axially one of the two protuberances located on each of the two side faces of the chocks, said protuberances making said chocks slid axially with a slight clearance in the choke guide housings arranged in each of the eight blocks hydraulic bending, and two devices for guiding each of the lateral support members of each of the upper and lower intermediate rolls, respectively four upper bending blocks supporting the two chock
  • a sexto rolling cage comprises two working rolls 1u, 1d of small diameters, respectively an upper work roll 1u located above a rolling plane D of a strip to be rolled, and a lower work roll 1d located below said plane of travel D of the strip to be rolled.
  • Said laminating strip runs between the two working cylinders 1u, 1d supported vertically, and in particular driven by friction, by a pair of intermediate cylinders 2u, 2d, themselves supported vertically by a pair of support rollers 3u, 3d pressing on said pair of intermediate cylinders 2u, 2d.
  • the working rolls 1u, 1d have their longitudinal axis of rotation in a plane substantially perpendicular to the running plane of the band, and commonly called the clamping plane P.
  • each work roll is not only supported by a part vertically by the two intermediate cylinders 2u, 2d, ie respectively the upper intermediate cylinder 2u and the lower intermediate cylinder 2d, themselves supported by the two support cylinders 3u, 3d vertical, ie respectively the support cylinder upper 3u and the lower support cylinder 3d, but also, on the other hand, each working cylinder 1u, 1d is supported laterally by lateral support members each comprising in particular a lateral support cylinder 4u, 4d, supported by two rows of support rollers 5 mounted side by side.
  • each row of support rollers 5 is composed of a plurality of rollers arranged side by side along a common axis on a common two-row support arm.
  • the figure 2 describes an exemplary embodiment of a lateral support member 7 of a sexto rolling cage according to the prior art, said lateral support member 7 being integral with chocks 21 of an intermediate cylinder 2.
  • Said chocks 21 are axially fixed relative to the uprights 6 of the rolling stand.
  • the intermediate cylinder 2, in particular an upper intermediate cylinder as presented in Fig. 2 is supported at each of its ends by one of said chocks 21 axially fixed relative to the uprights 6 of the rolling stand, but capable of vertical displacements between these same amounts.
  • a guide in rotation of the intermediate cylinder 2 in its chock is provided by a bearing 22 comprising in particular an outer ring 221 and cylindrical rollers 222.
  • a journal 23 of said intermediate cylinder is able to slide axially on the cylindrical rollers 222.
  • Two lateral support members 7, only one of which is shown here, are distributed on either side of a clamping plane P which can in particular comprise the longitudinal axes of rotation of the working cylinders 1, so as to support the cylinder laterally. 1 with which they are in contact.
  • Each lateral support member 7 comprises in particular a support arm 71 adapted to carry both a lateral support cylinder 4 and its support rollers 5.
  • two lateral support cylinders 4, only one of which is shown, are distributed on either side of the clamping plane P.
  • Each a pair of lateral support cylinders 4 is able to laterally support one of said working rolls 1.
  • Each lateral support roll is itself supported by two rows of rollers 5.
  • the lateral support member 7 is furthermore able to pivot around a guiding member 72 secured to the chock 21.
  • the lateral support members 7 are also fixed with respect to said uprights 6 of the rolling stand, and therefore with respect to the work rolls. 1.
  • the axial displacement of the intermediate cylinder 2 is thus ensured by axial sliding of its journals 23 with respect to the chock 21 and the bearing 22.
  • the journals 23 of the intermediate cylinder 2 must be extended by a corresponding length. at the axial displacement distance of the intermediate cylinder 2.
  • the figure 3 discloses an embodiment according to the prior art of a lateral support member 7 of a sexto rolling stand, said lateral support member 7 being secured to chocks 21 of an intermediate roll 2.
  • said chocks 21 are axially movable relative to the uprights 6 of the cage rolling.
  • said chocks 21 are movable axially and vertically relative to the uprights 6 of the rolling stand, while being able to support the intermediate cylinder 2 and the lateral support members 7 they support.
  • the intermediate cylinder 2 in particular an upper intermediate cylinder as presented in Fig. 3 , is capable of being supported at each of its ends by said chock 21 axially displaceable relative to the uprights 6 of the rolling stand and capable of vertical displacements between these same uprights 6.
  • a bearing 22 composed of an outer ring 221, d an inner ring 224 and rollers 222 is adapted to guide the intermediate cylinder 2 in rotation in its chock.
  • the chocks 21 of said intermediate cylinder are able to move synchronously with said intermediate cylinder, while the journals 23 of said intermediate cylinder are able to remain fixed relative to the bearings 22.
  • the working cylinder 1 is supported laterally on two lateral support cylinders 4, only one of which is shown. Each lateral support cylinder is supported by two rows of rollers 5.
  • a lateral support member 7 comprises in particular a support arm 71 adapted to bear both the lateral support rollers 4 and the rollers 5. This support member lateral 7 is further able to pivot about a guide member 72 integral with the chock 21 and to accompany the chock 21 during its axial displacement.
  • the chocks 21 are axially movable relative to the uprights 6 of the rolling stand and synchronously accompany the axial displacement of the intermediate roll. Therefore, the lateral support members 7 are able to move relative to the working roll 1, which remains axially fixed between axial stops (not shown) which are themselves, during rolling, axially fixed relative to the uprights 6 of the rolling stand.
  • the figure 4 shows an exemplary embodiment of lateral support members 7 of a rolling stand according to the prior art, said lateral support members 7 being secured to the uprights 6 of the rolling stand.
  • the rolling stand is equipped with two working rolls 1, each supported on the one hand vertically by two intermediate rolls 2, and on the other hand laterally by two lateral support rollers 4 themselves supported by two rows of rollers. support 5 mounted side by side.
  • each of said intermediate cylinders 2 is itself supported by a vertical support cylinder 3.
  • a support arm 71 adapted to carry both a lateral support cylinder 4 and its rollers 5 is able to slide in a guiding device 72 integral with the upright 6 of the rolling stand.
  • an interference 8 between the work roll 1 and at least one of the two support rolls lateral 4 can take place.
  • the working roll 1 is able to interfere with a lateral support roll 4, for example by contacting the latter, during a vertical displacement of said work roll 1.
  • the figure 5 shows an exemplary embodiment of a rolling stand according to the invention.
  • the rolling stand comprises two working rolls 1 capable of gripping a strip to be rolled, more specifically, an upper working roll situated above a rolling plane D of the rolling mill. rolling strip, and a lower working cylinder located below said plane of travel D of the strip to be rolled, the upper and lower working rolls 1 having their longitudinal axes of rotation in a clamping plane P substantially perpendicular to the plane of two rolls 2, respectively an upper intermediate roll adapted to be in contact with the upper working roll and a lower intermediate roll adapted to be in contact with the lower work roll, two rolls of rolling tape D, two intermediate rolls 2, support 3, respectively an upper support cylinder adapted to be in contact with the upper intermediate cylinder, and a lower support cylinder adapted to be in contact with the lower intermediate cylinder, the upper and lower bearing rolls being adapted to transmitting a clamping force to the work rolls 1 via the intermediate rolls, or in other words, the rolling stand comprises six cylinders superimposed vertically in a configuration of
  • the rolling stand according to the invention comprises in particular at least one bending block 9 capable of moving vertically relative to the uprights 7 of the roll stand, while serving as support for said lateral support member 7, at least one chock 21 of an intermediate cylinder 2, and allowing axial displacement of said chock 21 with respect to the uprights 6 of the rolling stand, and therefore of the intermediate cylinder 2 that she supports.
  • the constructive arrangements described by the Fig. 5 allow the lateral support members 7 to remain axially fixed with respect to the working rolls during axial displacement of the intermediate rolls, to remain fixed with respect to the intermediate rolls during a vertical displacement of said intermediate rolls, to remain fixed with respect to the stand rolling during dismounting of the intermediate rolls out of said cage, and in all circumstances, said constructive arrangements according to the invention allow the lateral support members to remain adjustable radially relative to the working rolls.
  • each of said lateral support members 7 comprises a support arm 71 adapted to carry a lateral support cylinder 4 and support rollers 5.
  • the lateral support members are capable of laterally supporting said working rolls 1 by means of said lateral support rollers 4.
  • Each of these latter is able to laterally contact said working rolls in order to keep the work roll 1 in a lateral position substantially constant or according to a set position.
  • each side of one of said working cylinders 1 is adapted to be supported, by pressing against one of its generatrices, by one of said lateral support cylinders, distributed thereby on both sides of said clamping plane P.
  • said lateral support rollers 4 are further themselves supported laterally by two rows of said support rollers mounted side by side.
  • the intermediate cylinders 2 are capable of being supported at each of their ends by said chock 21 axially movable with respect to the uprights 6 of the rolling stand, said mobility of the chock resulting for example from a sliding of parts of said chock 21 on parts of the bending blocks 9 provided for this purpose.
  • Each lateral support member is in particular adapted to pivot about a guiding device 72, or more precisely, around an axis of rotation of a guiding device 72 integral with one of said shafting blocks 9, or still to slide in a direction or a path defined by said guide member 72.
  • a lateral support member displacement means comprising for example a thrust member 73, is adapted to rotate said member of lateral support around said guiding device 72, in particular around its axis of rotation.
  • the support arm 71 of said lateral support member is able to pivot about said guiding device 72, in particular under the action of said thrust member 73 capable of taking up radial forces received by the work rolls 1 during the rolling.
  • a force distribution beam 731 with high inertia is intercalable between the thrust members 73 and said support arm 71 to distribute the reactions of the thrust members 73 over the entire length of the support arm 71.
  • Figures 6 and 7 following show an example of implantation of such a force distribution beam 731.
  • Each of the thrust members 73 of said moving means is in particular actuable by at least one screw or wedge actuator 74 capable in particular of synchronously actuating at least two thrust members 73, each located at a longitudinal end of the lateral support member, said longitudinal end referring in particular to each of the two ends of the lateral support member 7 according to the width of the strip.
  • a jack 75 is particularly capable of acting, ie exerting a force, between a bending block 9 and a point of articulation 76 of a lateral support member 7 supported by the guiding device of said bending block, in order to pivoting said lateral support member about an axis of rotation of said guide device 72 integral with said bending block 9.
  • said pivoting allows positioning of said lateral support members when the thrust members 73 are in a retreating position.
  • a support arm 71 of a lateral support member 7 comprises said hinge point 76.
  • said jack 75 is for example a hydraulic jack integral with one of said bending blocks and able to rotate said support arm 71 including said hinge point 76 about said axis of rotation of the guiding device 72.
  • each bending block 9 is in particular able to be moved vertically by an actuator 92, arranged in particular between the bending blocks 9 of a pair of bending blocks comprising an upper bending block and a boulder block. lower bending, said upper and lower bending blocks being distributed on either side of the plane of travel of the strip to be rolled, close to the same end of a working cylinder 1.
  • the rolling stand according to the invention comprises in particular hydraulic actuators 92 capable of ensuring a vertical displacement said bending blocks 9 relative to the uprights 6 of the rolling stand.
  • four hydraulic actuators 92 can be arranged between a first group of four upper bending blocks and a second group of four lower bending blocks, each of said actuators being able to vertically move the bending blocks of a pair of boulders.
  • cambering 9 comprising an upper bending block and a lower bending block.
  • a hydraulic actuator 92 may be arranged between the bending blocks of each pair of bending blocks 9, in order to vertically and synchronously move groups of four bending blocks 9 relative to the uprights 6 of the bending cage.
  • rolling in particular said first group of four upper bending blocks movable synchronously by their hydraulic actuators and said second group of four lower blocks synchronously movable by their hydraulic actuators.
  • the bending blocks 9 are able to move vertically on bending block supports 91 integral with the uprights 6 of the rolling stand.
  • the figure 6 presents a first exemplary embodiment according to the invention of a means for moving lateral support members, comprising in particular two thrust members 73.
  • the support arm 71 of lateral support member is adapted to be pushed by the two thrust members 73.
  • the latter are able to be guided on the uprights 6 of the rolling stand and / or on bending block supports integral with said uprights and to act in a synchronized manner.
  • These thrust members may in particular be each actuated by a screw 741 fixed in rotation and adapted to reversibly axially move said thrust member 73 under the action of a wheel and worm member or a deflection member d 742 bevel gear angle.
  • the bevel gear 742 is particularly operable by a motor 743.
  • wedges 744 able to be eclipsed and actuated by jacks 745 in particular make it possible to quickly release the support arm 71 from a lateral support member.
  • Each of said wedges is in particular positionable between said thrust member and said support arm 71.
  • a force distribution beam 731 with high inertia is in particular intercalable between the thrust members 73 and the support arm 71 in order to distribute the thrust forces along the entire length of said support arm 71.
  • the figure 7 presents a second example of a means of displacement of lateral support members according to the invention, comprising in particular two thrust members 73 able to move, in particular by pushing, the lateral support support arm 71.
  • Each of said thrust 73 is particularly suitable for being guided on uprights 6 and / or bending block supports.
  • These thrust members are in particular synchronously actuable by two corner boxes 746.
  • said thrust members 73 are in particular able to move axially .
  • pins 749 engageable in grooves parallel to the slope of the corners in particular allow a backward movement of the thrust members 73 and provide a reminder of the displacement of said thrust members.
  • shims 744 capable of being eclipsed and actuable by jacks 745 make it possible in particular to quickly release the support arm 71 from a lateral support member.
  • Said wedges are each in particular positionable by means of said jacks 745 between said thrust member and said support arm 71.
  • a force distribution beam 731 with high inertia is in particular intercalable between the thrust members 73 and the support arm 71 in order to distribute the thrust forces along the entire length of said support arm 71.
  • the figure 8 shows an example of use of lateral support members 7 as dismantling rails of the intermediate cylinders 2 according to the invention.
  • Upper and lower bending blocks 9d are displaceable in disassembly position by displacement on bending block supports 91, said bending block supports 91 being integral with uprights 6 of the rolling stand.
  • each support arm 71 of each of said lateral support members is adapted to be pivoted about an axis of rotation of the guiding device 72 which supports it, to ensure free passage of the upper chocks 21u and lower 21d , respectively carrying the upper intermediate cylinder 2u and the lower intermediate cylinder 2d.
  • each of the upper support arms 71u of the upper lateral support members is adapted to comprise in particular a sliding surface 711u or rolling adapted to cooperate with rollers or sliding pads (not shown) can equip 211u ears of higher chocks 21u.
  • an extraction of an upper intermediate cylinder 2u carried by said upper chocks 21u able to move axially by sliding or rolling respectively said pads or said wheels on said surfaces 711u is achievable by axial displacement of said chocks on the upper support arms 71u of the lateral support members to a disassembly carriage (not shown) out of the rolling stand.
  • each lower support arm 71d of lower lateral support member comprises a sliding surface 711d or rolling allowing the lower chocks 21d to move axially by sliding or rolling respectively by means of sliding shoes or rollers (not shown) which can equip surfaces 211d of said lower chocks 21d, said sliding pads or rollers being intended to cooperate with the sliding or rolling surfaces 711d to allow extraction of the lower intermediate cylinder 2d and its lower chocks 21d from the rolling stand to a dismounting carriage.

Claims (15)

  1. Walzgerüst, umfassend zwei Arbeitswalzen (1), die dazu geeignet sind, ein zu walzendes Band einzuschließen, zwei Zwischenwalzen (2), zwei Stützwalzen (3), mindestens ein seitliches Stützelement (7), das dazu geeignet ist, eine der Arbeitswalzen (1) seitlich abzustützen, mindestens einen Biegeblock (9), der für das Biegen der Zwischenwalzen (2) vorgesehen und dazu geeignet ist, in Bezug auf die Ständer (6) des Walzgerüsts vertikal verschoben zu werden, dadurch gekennzeichnet, dass der Biegeblock (9) dazu geeignet ist, das seitliche Stützelement (7) abzustützen.
  2. Walzgerüst nach Anspruch 1, dadurch gekennzeichnet, dass der Biegeblock (9) eine Führungsvorrichtung (72) umfasst, die mit dem Biegeblock (9) fest verbunden und dazu geeignet ist, das seitliche Stützelement (7) abzustützen und zu führen.
  3. Walzgerüst nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Biegeblock (9) dazu geeignet ist, mindestens eine Lagerbuchse (21) einer Zwischenwalze (2) sowie eine axiale Verschiebung von letzterer abzustützen.
  4. Walzgerüst nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das seitliche Stützelement (7) um die mit dem Biegeblock (9) fest verbundene Führungsvorrichtung (72) schwenkbar ist.
  5. Walzgerüst nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein Betätigungselement (92) dazu geeignet ist, den Biegeblock (9) vertikal zu verschieben.
  6. Walzgerüst nach Anspruch 5, dadurch gekennzeichnet, dass eine erste Gruppe von vier Biegeblöcken (9), die dazu geeignet sind, als Träger für die Lagerbuchsen (21) einer oberen Zwischenwalze zu dienen, und eine zweite Gruppe von vier Biegeblöcken (9), die dazu geeignet sind, als Träger für die Lagerbuchsen (21) einer unteren Zwischenwalze zu dienen, jeweils in Bezug auf die Ständer (6) des Walzgerüsts mittels mindestens einem Betätigungselement (92) vertikal synchronisiert verschiebbar sind.
  7. Walzgerüst nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die axialen Verschiebungselemente dazu geeignet sind, die Zwischenwalzen (2) durch eine Verschiebung der Lagerbuchsen (21) der Zwischenwalzen in Bezug auf die Biegeblöcke (9) axial zu verschieben.
  8. Walzgerüst nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass mindestens ein Mittel zum Verschieben eines seitlichen Stützelements (7) dazu geeignet ist, das seitliche Stützelement (7) zu verschieben und zu positionieren.
  9. Walzgerüst nach Anspruch 8, dadurch gekennzeichnet, dass das Mittel zum Verschieben mindestens ein Schubelement (73) umfasst.
  10. Walzgerüst nach Anspruch 9, dadurch gekennzeichnet, dass zwei Schubelemente (73), die mittels einer Schraubenvorrichtung (74) synchronisiert betätigbar sind, dazu geeignet sind, jeweils synchronisiert auf ein Ende eines der seitlichen Stützelemente (7) mit Hinblick auf deren Positionierung einzuwirken.
  11. Walzgerüst nach Anspruch 9, dadurch gekennzeichnet, dass zwei Schubelemente (73), die mittels einer Keilvorrichtung synchronisiert betätigbar sind, dazu geeignet sind, jeweils synchronisiert auf ein Ende eines der seitlichen Stützelemente (7) mit Hinblick auf deren Positionierung einzuwirken.
  12. Walzgerüst nach einem der Ansprüche 9 oder 11, dadurch gekennzeichnet, dass ein Keil mittels eines Zylinders zwischen dem Ende eines seitlichen Stützelements (7) und einem der Schubelemente (73) positionierbar ist.
  13. Walzgerüst nach einem der Ansprüche 10 bis 12, gekennzeichnet durch eine Schubkraftverteilungsstütze (731) mit hoher Trägheit, die zwischen einem seitlichen Stützelement (7) und mindestens einem seiner Schubelemente positionierbar ist.
  14. Walzgerüst nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass jedes seitliche Stützelement dazu geeignet ist, eine Ausfahrschiene zu umfassen, die dazu geeignet ist, zum Ausbau einer Zwischenwalze zu dienen.
  15. Verfahren zum Betreiben eines Walzgerüsts, umfassend zwei Arbeitswalzen (1), die dazu geeignet sind, ein zu walzendes Band einzuschließen, zwei Zwischenwalzen (2), zwei Stützwalzen (3), mindestens ein seitliches Stützelement (7), das dazu geeignet ist, eine der Arbeitswalzen (1) seitlich abzustützen, mindestens einen Biegeblock (9), der dazu geeignet ist, in Bezug auf die Ständer (6) des Walzgerüsts vertikal verschoben zu werden, und für das Biegen der Zwischenwalzen (2) vorgesehen ist, gekennzeichnet durch eine Abstützung des seitlichen Stützelements (7) durch den Biegeblock (9) und durch eine einstellbare Positionierung des seitlichen Stützelements (7), wodurch ermöglicht wird:
    - erstens ein fester Halt des seitlichen Stützelements (7) in Bezug auf die Arbeitswalze (1), die bei einer axialen Verschiebung der Zwischenwalze (2), die mit der Arbeitswalze (1) in Kontakt sein kann, durch das seitliche Stützelement (7) abstützbar ist;
    - zweitens ein fester Halt des seitlichen Stützelements (7) in Bezug auf die Zwischenwalze (2), die bei ihren vertikalen Bewegungen in Kontakt mit der Arbeitswalze (1) sein kann, die durch das seitliche Stützelement (7) abstützbar ist;
    - und drittens ein fester Halt des seitlichen Stützelements (7) in Bezug auf das Walzgerüst bei einem Ausbau der Zwischenwalzen (2).
EP10720276.4A 2010-03-03 2010-04-01 Walzgerüst Active EP2542360B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10720276.4A EP2542360B1 (de) 2010-03-03 2010-04-01 Walzgerüst

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Application Number Priority Date Filing Date Title
EP10290105 2010-03-03
EP10720276.4A EP2542360B1 (de) 2010-03-03 2010-04-01 Walzgerüst
PCT/EP2010/054449 WO2011107165A1 (fr) 2010-03-03 2010-04-01 Cage de laminage

Publications (2)

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EP2542360A1 EP2542360A1 (de) 2013-01-09
EP2542360B1 true EP2542360B1 (de) 2015-03-04

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US (1) US8991231B2 (de)
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KR (1) KR101591563B1 (de)
CN (1) CN102781599B (de)
BR (1) BR112012021676B1 (de)
WO (1) WO2011107165A1 (de)

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EP3381576A1 (de) 2017-03-31 2018-10-03 Primetals Technologies France SAS Walzgerüst, das mit einer kontrollvorrichtung für die walzstabilität ausgerüstet ist, und entsprechende methode

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EP2777832A1 (de) * 2013-03-13 2014-09-17 Siemens VAI Metals Technologies GmbH Vorrichtung zur Inbetriebsetzung der Drehbewegung der Arbeitswalzen eines Walzwerks, und Methode zum Auswechseln der genannten Walzen
FR3008633B1 (fr) 2013-07-22 2015-08-07 Fives Dms Laminoir equipe d'au moins une buse de refroidissement
FR3010332B1 (fr) * 2013-09-12 2015-10-02 Fives Dms Cassette pour laminoir et laminoir equipe d'une telle cassette
CN104998914A (zh) * 2015-07-24 2015-10-28 中冶南方工程技术有限公司 适用于腐蚀环境的压辊装置
FR3078494B1 (fr) * 2018-03-05 2021-12-17 Fives Dms Procede de laminage avec etape de reajustement de l'inter-espace entre le cylindre d'appui lateral et le cylindre de soutien
CN111054752A (zh) * 2019-12-24 2020-04-24 西安艾蒙希科技有限公司 一种高精度环形带材轧机
CN113414152B (zh) * 2021-06-28 2024-04-30 欣旺达动力科技股份有限公司 除尘装置

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Publication number Priority date Publication date Assignee Title
EP3381576A1 (de) 2017-03-31 2018-10-03 Primetals Technologies France SAS Walzgerüst, das mit einer kontrollvorrichtung für die walzstabilität ausgerüstet ist, und entsprechende methode
WO2018177827A1 (fr) 2017-03-31 2018-10-04 Primetals Technologies France SAS Cage de laminoir équipée d'un dispositif de contrôle de stabilité de laminage et méthode associée

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BR112012021676B1 (pt) 2020-11-03
CN102781599A (zh) 2012-11-14
BR112012021676A2 (pt) 2017-11-07
KR20130028899A (ko) 2013-03-20
US8991231B2 (en) 2015-03-31
CN102781599B (zh) 2015-04-22
US20120324973A1 (en) 2012-12-27
EP2542360A1 (de) 2013-01-09
WO2011107165A1 (fr) 2011-09-09
KR101591563B1 (ko) 2016-02-03

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