EP1044736B1 - Walzwerk mit hydraulischer Anstellung - Google Patents

Walzwerk mit hydraulischer Anstellung Download PDF

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Publication number
EP1044736B1
EP1044736B1 EP00401038A EP00401038A EP1044736B1 EP 1044736 B1 EP1044736 B1 EP 1044736B1 EP 00401038 A EP00401038 A EP 00401038A EP 00401038 A EP00401038 A EP 00401038A EP 1044736 B1 EP1044736 B1 EP 1044736B1
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EP
European Patent Office
Prior art keywords
roll
jack
stand
standard
resting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00401038A
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English (en)
French (fr)
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EP1044736A1 (de
Inventor
Jean-Pierre Bravo
Robert Benod
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
VAI Clecim SA
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Filing date
Publication date
Application filed by VAI Clecim SA filed Critical VAI Clecim SA
Publication of EP1044736A1 publication Critical patent/EP1044736A1/de
Application granted granted Critical
Publication of EP1044736B1 publication Critical patent/EP1044736B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting

Definitions

  • the invention relates to improvements hydraulic rolling mills comprising, in particular, means of locating positions relative of the cylinders.
  • a rolling mill includes, inside a fixed cage, at least two working cylinders defining an air gap of passage of the product along a rolling plan. For maintain the spacing of the working cylinders, which determine the reduction in product thickness, these the latter are supported, generally by through larger diameter cylinders said support or support cylinders, on means clamping bearing themselves on the cage.
  • a rolling mill called "quarto" type for example, includes two supporting working cylinders respectively on two support cylinders.
  • an intermediate cylinder is interposed between each working cylinder and the corresponding support cylinder.
  • other types of rolling mills we know also other types of rolling mills.
  • the rolling mill stand normally includes two vertical columns connected by a crosspiece and on which are mounted clamping means taking support, respectively, on each end of a adjustable level cylinder, usually a cylinder Support.
  • Each cylinder is carried by a shaft of rotating rotation, at its two ends, in bearings each mounted in a support block called "chock" and able to slide, according to a plan of clamping passing through the axes of the working cylinders, in a window inside the column corresponding from the cage.
  • the tightening of the cylinders was produced by mechanical devices of the screw-nut type, comprising, for example, a screw supported, by an internal end, on the chock corresponding support cylinder and meshing in a fixed nut bearing, in the opposite direction, on the column, the screw being rotated back and forth to tighten or loosen the cylinders.
  • hydraulic clamping devices comprising, on each column, two elements sliding one inside the other, respectively a mobile element resting on the cylinder chock and a fixed element bearing on the column.
  • hydraulic cylinders allow, in particular, to facilitate effort control rolling and ensuring thickness regulation of the laminated product. For this it is necessary to allow a dynamic response of the system and, by Therefore, to know precisely the position of the cylinder adjustable relative to the cage, from which we can determine the positions of others cylinders.
  • the measuring rod passes with play in the tubular sheath so as to avoid any measurement disturbance, the rod having no contact with no other part of the rolling mill than the element mobile of the jack on which it is fixed.
  • auxiliary cylinders are available usually used for weight balancing cylinders and, if necessary to exercise cambering efforts to compensate for bending cylinders.
  • these balancing cylinders act on the chocks of the cylinders and cannot therefore not be used to hold the clamping cylinders in raised position, in the phases of change of cylinders for maintenance operations.
  • the invention makes it possible to remedy such disadvantages in proposing a reminder device particularly simple, applicable to cylinders of advantageous single acting clamping to use the existing provisions, without complicate the rolling stand.
  • the invention is particularly useful for the modernization of existing cages.
  • the invention therefore applies, in a way general, to a rolling mill of the type described above, in which the means for clamping the cylinders include two mounted hydraulic cylinders respectively on the two columns of the cage and each comprising two sliding mounted elements one inside the other and delimiting a room of pressure supplied with pressurized fluid, respectively, a movable support element on the block supporting the corresponding end of the cylinder adjustable and a fixed element resting on the cage column, said rolling mill being equipped with means for measuring the position of the adjustable cylinder comprising, at each end of the cylinder, a rod measuring device having an internal end connected to the movable member of the clamping cylinder and extending successively through the pressure chamber, the fixed element of the jack and the column of the cage, to an outer end placed outside of the cage, said rod passing with play in a sheath tubular extending into the pressure chamber of the cylinder for maintaining the tightness thereof, said sheath having an integral internal end axially of the movable element of the jack and a part sealing sliding mounted in relation to
  • the sheath tubular seal associated with each cylinder is extended outwards, beyond the part sliding sealing, by a connecting member elongated extending along the measuring rod and crossing the column of the cage to one end placed outside the cage on which is fixed a support part of an element return means movable from the jack to the fixed element, said means of booster resting on the cage column and acting on the movable element through the connecting member and the sealing sleeve, in the opposite direction to the tightening direction.
  • the connecting member is fixed, at its end placed at the outside of the column, on at least one arm extending transversely and the return means is consisting of at least one cylinder having a fixed element leaning on the column in an offset position transversely to the measuring rod and a mobile element resting on said arm transverse.
  • the link member is associated with at least two transverse arms extending symmetrically and forming a spreader on which are supported by at least two offset return cylinders on either side of the measuring rod.
  • a joint is arranged between the sleeve and the connecting member in order to allow misalignments.
  • the elongated connecting member consists of a sleeve tubular extending in the extension of the sheath sealing and having a central bore of sufficient diameter for passage with rod clearance of measurement.
  • the jack clamp includes a fixed hollow body supported on the cage column and a movable piston taking support on the cylinder support block.
  • the cylinder clamping includes a fixed piston resting on the cage column and a movable hollow body taking support on the cylinder support block.
  • Figure 1 shows schematically a first embodiment of the invention.
  • Figure 2 shows a second mode of realization of the invention adapted, in particular, to the modernization of an existing rolling stand.
  • the invention can be applied to any type of rolling mill including several cylinders superimposed inside a cage comprising two separated columns fixed on a solid foundation and connected by a cross.
  • Figure 1 which applies to a rolling mill quarto or sexto having a support cylinder 2 of adjustable level, only the part is shown top of a column 1 in which is provided a window 11 for guiding a chock 21 of the cylinder 2.
  • the column normally has the form of a closed frame comprising two uprights 12, 12 'and one top rail 13. Both sides of the window 11 form guide faces 14, 14 'of the chocks cylinders.
  • a hydraulic cylinder of clamping 3 comprising a cylindrical body 31 in which is slidably mounted a piston 32 limiting a pressure chamber 33 which can be supplied with fluid under pressure by a hydraulic circuit not represented.
  • the body 31 constitutes the fixed element of the cylinder which rests on the cross member 13 of the column 1, the piston 32 constituting the movable element which takes support on the chock 21 by a front part 34 forming the cylinder rod.
  • the rolling mill is equipped with a device for measuring the position of cylinder 2 which is of the type described in French patent 2,645,051 of the same company and therefore includes a measuring rod 4 having an internal end 41 secured axially with the movable element 32 of the cylinder and which passes through the fixed element 31 and the column 1 up to an external end 42 connected to a measuring device 43 placed outside the column 1.
  • the rod 4 therefore passes successively through a bore 44 formed in the bottom of the body 31 of the jack and in a bore 45 formed in the cross member 13 of the column 1.
  • a tubular sheath 5 is interposed between the movable element 32 and the fixed element 31 of the cylinder 3.
  • This sheath 5 is hooked by its end internal 51, to piston 32 and is slidably mounted, its opposite end 52, along the bore 44 of the cylinder body 31, with interposition of a seal sliding seal. In this way, the sheath 5 can follow the movements of the piston 32, the part sliding 52 now sealing the chamber pressure 33.
  • the sleeve 5 is provided with a central bore of diameter greater than that of the rod 4 which passes thus with play in this bore, without contact with the scabbard. In this way, the measurement does not risk to be disturbed by due misalignments, by example, to deformations of the various parts of the cage.
  • cylinder 2 can be subjected to a bending during the passage of the product and it is necessary to leave clearances between the faces of guide 14, 14 'of the column and chock 21 which can therefore be slightly offset from the cage.
  • the piston 32 rests directly on the chock 21 and can therefore be itself subject to misalignments by relation to the fixed body 31 which rests on the column 1.
  • These misalignments can be cashed by the sheath 5 which, in the provision of the patent French 2.645.051 already cited, is connected respectively to the piston 32 and to the fixed body 31 of the jack by articulated joints 51, 52.
  • the game left between the measuring rod 4 and the tubular sleeve 5 must be sufficient to allow these misalignments without risk of contact between the two parts.
  • the movable element 32, 34 is supported directly on the chock 21 by a flat face allowing to distribute constraints but whose piston can pivot slightly in relation to the cylinder body, the sheath tubular allowing, as we have seen, to admit misalignments.
  • a cylinder is used simple effect, it is necessary to provide means cylinder return in the opposite direction to the force of Tightening.
  • the present invention resolves so particularly simple this problem using, for the recall, the tubular sheath 5 which is necessary, anyway, to seal the pressure chamber 33.
  • the sheath 5 is extended, from opposite side to cylinder 2, by a connecting member elongated 53 which extends along the measuring rod 4, without contact with it and passes through bore 45 to lead to the outside of the cage, on the other side of cross member 13 of column 1.
  • the connecting member 53 is provided two transverse arms 55 which extend symmetrically on either side of axis 40 of the measuring rod 4, so as to form a spreader on which are supported by two cylinders 56 mounted on the external face 13 ′ of the cross member 13.
  • the connecting member is a tubular sleeve 53 defining a central bore in which the measuring rod 4 passes with clearance and which extends in the extension of the sealing sleeve 5 to the outside of the cage 1.
  • the sleeve 5 is secured, in axial displacement, with the piston 32 of the cylinder, by its lower end 51 which forms a ball joint.
  • the measuring rod 4 passes with clearance to the inside of the sleeve 53 which constitutes a simple extension of the tubular sheath 5 for holding sealing.
  • the sleeve 53 can pass freely in bore 45. However, it is preferable to place, at the outlet of bore 45, a sliding seal 15 for guiding the sleeve 53 which is then held laterally by the two seals sliding 52 and 15.
  • extension sleeve 53 does not not necessarily form a single piece with the sleeve 5 but can be connected to it by a articulation allowing misalignments.
  • the whole of the spreader 55 and the cylinders of reminder 56 can be placed in a cover 16 on which is fixed the measuring device 43 connected to the end 42 of the measuring rod 4.
  • the body 31 of the cylinder is fixed and is therefore arranged in the part top of window 11.
  • the angles of window 11 are normally rounded to ensure continuous transmission of the clamping forces on the uprights 12, 12 'of the column and it can be difficult to accommodate the body of a cylinder having a sufficient section. Therefore, it can be interesting to reverse the arrangement of figure 1, the piston 32 of the jack being fixed while the body cylindrical 31 is movable and rests on the chock 21 of cylinder 2, the body 31 of the jack being able to have an upper side adapted to the profile of the face crosspiece 13 while providing a internal chamber 33 of sufficient section to exercise the clamping force required without increasing excessively pressure.
  • the old cages are provided, usually from mechanical clamps to screw-nut comprising, on each column, a screw driven in rotation, in one direction or the other, by external means, and whose internal end rests on the chock of the cylinder to be moved, the screw rotating in a fixed rotating nut which is supported, in the opposite direction, on the column.
  • the invention allows, without replacing cage columns, to adapt a clamping system hydraulic to a rolling mill of this type.
  • the piston 32 ' on which the body is slidably mounted cylindrical 31 'of the jack, is extended by a part support 34 which, in this case, extends towards the rear of the cylinder.
  • the rear part 34 'of the piston is associated with a spacer piece 35 which slides into the housing 62 to come to bear on the machined face 63.
  • the body of the jack 31 ′ which is housed at the top of the window 11, rests on the chock 21 by its bottom 30 which has sufficient seating area for the transmission of the clamping force.
  • the measuring rod 4 extends inside a tubular sheath 5 having a lower end 51 secured in the direction axial, from the bottom of the cylindrical body 31 and a upper end 52 which slides in a bore 44 'formed in the piston 32' and its rear part 34.
  • the bore 44 ' can advantageously be covered a shirt along which the joint slides sliding 52.
  • the sheath 5 is extended upwards by a sleeve 53 which loosely surrounds the measuring rod 4 until the exit of it outside the crosspiece 13.
  • the sleeve 53 can be maintained at its upper part 54, by a sliding joint 15 'which can consist of a simple friction sleeve soft mounted on a closing plate 64 of bore 6.
  • the piston 32 ' is held applied by its rear part 34 'against the face support 63 by bolts 65 regularly distributed around the axis and bearing on the plate 64.
  • the part outer 54 of sleeve 53 carries a spreader 55 on which are supported by the lifting cylinders 56.
  • the assembly is covered by a cover 16 on which the measuring device, not shown, is fixed, associated with the rod 4.
  • the link between the sealing sleeve 5 and the return means could consist of two rods extending along the measuring rod 4 and fixed by joints, to their ends, respectively on the sleeve 5 and on the lifting beam 55.
  • the invention has been described in measuring device frame according to patent French 2,645,051 from the same company, but it could apply to any tracking device using a measuring rod connected to the movable element of the jack and passing through a holding sleeve of the sealing of the pressure chamber.
  • a spherical support is provided between the movable element of the jack and the chock of the cylinder to be actuated, the sealing sleeve can be slidably mounted in the bore in the cage column, which ensures more easily sealing.
  • the sleeve surrounding the measuring rod can be extended to the outside of the cage by a sleeve carrying a lifting beam or even a single transverse arm of one or more lifting cylinders. In this case, there is no need to provide ball joints between the sleeve and the elements of the jack.
  • recall means could also be changed.
  • the sleeve of extension 53 could be actuated by a cylinder annular threaded on its external part 54.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Actuator (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Pulleys (AREA)
  • Friction Gearing (AREA)
  • Braking Arrangements (AREA)
  • Clamps And Clips (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (8)

  1. Walzwerk bestehend aus einem Stützgerüst mit zwei im Abstand angeordneten Ständern (1), mindestens zwei übereinanderliegenden Walzen, die einen Walzspalt zum Durchziehen eines gemäß einem Walzplan zu walzenden Erzeugnisses bestimmen und die je zwei drehende Enden in je einem gleitend angeordneten Stützblock (21), parallel zu einer durch die Walzenachsen durchgehende Anstellebene, zwischen zwei an zwei Seiten eines Fensters (11) jedes Ständers (1) angeordneten Führungsflächen (14, 14') aufweisen, auf mindestens eine höhenverstellbare Walze (2) wirkenden Walzenanstellmitteln bestehend aus zwei jeweils in den beiden Walzgerüstständern (1) montierten Anstellzylindern (3), die je zwei ineinander gleitende Teile umfassen und eine an Mittel zur Versorgung mit einem Druckmedium angeschlossene Druckkammer (33) begrenzen, jeweils einem auf dem Stützblock (21) des entsprechenden Endes der einstellbaren Walze (2) beweglich abgestützten Teil (32) und einem feststehenden auf dem Walzgerüstständer sich abstützenden Teil, und Messmitteln der einstellbaren Walzenlage bestehend an jedem Walzenende aus einer Messstange (4), dessen Innenende (41) mit dem beweglichen Teil (32) des Anstellzylinders (3) verbunden ist und sich sukzessiv durch die Druckkammer (33), das feststehende Zylinderteil (31) und den Walzgerüstständer (1) bis hin zu einem entgegengesetzten an der Aussenseite des Ständers (1) befindlichen Ende erstreckt, wobei diese Stange (4) mit Spiel in einem Rohrmantel (5) eingesetzt ist, der sich zur Gewährleistung der Dichtheit der Druckkammer (33) in dieser erstreckt, und wobei der Rohrmantel (5) ein bei Axialverschiebung mit dem beweglichen Teil (32) des Zylinders (3) fest verbundenes Innenende (51) und ein in Axialrichtung zu dem feststehenden Teil (31) gleitend montiertes Dichtungsteil (52) aufweist, dadurch gekennzeichnet, daß der jedem Zylinder (3) zugeordnete Rohrmantel (5) nach Außen hin über den gleitenden Isolierungsabschnittt (52) hinaus durch ein langgestrecktes Verbindungsglied (53) verlängert ist, das sich kontaktlos mit der Meßstange (4) entlang derselben erstreckt und den Walzgerüstständer (1) bis hin zu einem an der Aussenseite des Walzgerüstes (1) befindlichen Ende (54) durchquert , auf dem zum Rückzug des beweglichen Zylinderteils (32) zu dem feststehenden Teil (31) ein Abstützelement (55) der Mittel (56) befestigt ist, wobei unter Abstützung auf dem Walzgerüstständer (1) diese Rückzugmittel (56) über das Verbindungsglied (53) und den Rohrmantel (5) in entgegengesetzter Richtung zur Anstellung auf das bewegliche Teil (32) wirken.
  2. Walzwerk nach Anspruch 1, dadurch gekennzeichnet, daß das Verbindungsglied (53) an seinem Aussenende (54) an mindestens einem sich quer erstreckenden Arm (55) befestigt ist, und daß die Rückzugmittel mindestens einen Zylinder (56) umfassen, der ein auf dem Ständer (1) abgestütztes in einer zur Meßstange (4) versetzten Querlage feststehendes Teil (31) und ein auf diesem Querarm (55) sich abstützendes bewegliches Teil aufweist.
  3. Walzwerk nach Anspruch 2, dadurch gekennzeichnet, daß dem Verbindungsglied (53) mindestens zwei sich symmetrisch erstreckende quergerichtete als Traverse (55) ausgebildete Arme zugeordnet sind, auf der mindestens zwei beiderseits der Meßstange (4) versetzte Rückzugszylinder (56) abgestützt sind.
  4. Walzwerk nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem Rohrmantel (5) und dem Verbindungsglied (53) ein Gelenk angeordnet ist, um Fluchtlinienabweichungen zu ermöglichen.
  5. Walzwerk nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das langgestreckte Verbindungsglied ein sich in der Verlängerung des Dichtungsmantels (5) erstreckendes Überschiebrohr (53) ist, das zum Einsetzen der Meßstange (4) mit Spiel eine mittige Bohrung mit einem ausreichenden Durchmesser aufweist.
  6. Walzwerk nach Anspruch 5, dadurch gekennzeichnet, daß jeder Ständer (1) gleitende Führungsmittel (15) für das Überschiebrohr (53) aufweist.
  7. Walzwerk nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß jeder Anstellzylinder (3) aus einem feststehenden auf dem Walzgerüstständer (1) abgestützten Hohlkörper (31) und einem beweglichen auf dem Stützblock (21) der Walze (2) abgestützten Kolben (32) besteht,
  8. Walzwerk nach einem der vorangehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, daß jeder Anstellzylinder (3) einen feststehenden auf dem Walzgerüstständer (1) abgestützten Kolben und einen beweglichen auf dem Stützblock (21) der Walze (2) abgestützten Hohlkörper (21) aufweist.
EP00401038A 1999-04-16 2000-04-13 Walzwerk mit hydraulischer Anstellung Expired - Lifetime EP1044736B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9904840 1999-04-16
FR9904840A FR2792229B1 (fr) 1999-04-16 1999-04-16 Laminoir a serrage hydraulique

Publications (2)

Publication Number Publication Date
EP1044736A1 EP1044736A1 (de) 2000-10-18
EP1044736B1 true EP1044736B1 (de) 2003-02-12

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Application Number Title Priority Date Filing Date
EP00401038A Expired - Lifetime EP1044736B1 (de) 1999-04-16 2000-04-13 Walzwerk mit hydraulischer Anstellung

Country Status (6)

Country Link
US (1) US6170312B1 (de)
EP (1) EP1044736B1 (de)
AT (1) ATE232427T1 (de)
DE (1) DE60001376T2 (de)
ES (1) ES2188484T3 (de)
FR (1) FR2792229B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048686A1 (de) 2007-10-10 2009-04-16 Sms Demag Ag Positionsgeber zur Anstellhubwegmessung eines Kolben-Zylinder-Systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2207925C2 (ru) * 2001-03-28 2003-07-10 Открытое акционерное общество "Северсталь" Способ прокатки, прокатная клеть и нажимное устройство прокатной клети
CN106625334B (zh) * 2016-12-23 2018-06-01 宁波职业技术学院 一种快速可调压紧装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1602176A1 (de) * 1967-09-13 1970-04-02 Schloemann Ag Walzgeruest,insbesondere zum Auswalzen von Blechen oder Baendern,bestehend aus einer Grobanstellung sowie einer Feinanstellung der Walzen unter Walzdruck
US3852984A (en) * 1974-03-06 1974-12-10 Wean United Inc Coarse and vernier roll position system for a rolling mill
SU1128995A1 (ru) * 1983-02-24 1984-12-15 Всесоюзный ордена Ленина научно-исследовательский и проектно-конструкторский институт металлургического машиностроения Устройство дл регулировани раствора валков прокатной клети
FR2570003B1 (fr) * 1984-09-12 1987-01-09 Clecim Sa Dispositif de serrage hydraulique d'une cage de laminoir monte dans le bati de la cage en remplacement d'un dispositif de serrage a vis et ecrou
FR2645051A1 (fr) * 1989-03-28 1990-10-05 Clecim Sa Dispositif de reperage de la position des cylindres d'un laminoir
JP2966187B2 (ja) * 1991-08-14 1999-10-25 株式会社神戸製鋼所 圧延機
GB9213770D0 (en) * 1992-06-29 1992-08-12 Davy Mckee Sheffield An hydraulic load capsule for a metal working rolling mill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007048686A1 (de) 2007-10-10 2009-04-16 Sms Demag Ag Positionsgeber zur Anstellhubwegmessung eines Kolben-Zylinder-Systems

Also Published As

Publication number Publication date
EP1044736A1 (de) 2000-10-18
DE60001376D1 (de) 2003-03-20
ES2188484T3 (es) 2003-07-01
FR2792229A1 (fr) 2000-10-20
ATE232427T1 (de) 2003-02-15
US6170312B1 (en) 2001-01-09
FR2792229B1 (fr) 2001-07-13
DE60001376T2 (de) 2003-11-20

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