EP2836316B1 - Integrierte biegungs- und auswuchtungsvorrichtung für walzgerüste - Google Patents

Integrierte biegungs- und auswuchtungsvorrichtung für walzgerüste Download PDF

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Publication number
EP2836316B1
EP2836316B1 EP13725779.6A EP13725779A EP2836316B1 EP 2836316 B1 EP2836316 B1 EP 2836316B1 EP 13725779 A EP13725779 A EP 13725779A EP 2836316 B1 EP2836316 B1 EP 2836316B1
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EP
European Patent Office
Prior art keywords
bending
balancing
roll
movable slider
rolling stand
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Active
Application number
EP13725779.6A
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English (en)
French (fr)
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EP2836316A1 (de
Inventor
Andrea Dorigo
Maciej Zygmunt PROBULSKI
Luca Sandrin
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.)
Danieli and C Officine Meccaniche SpA
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Danieli and C Officine Meccaniche SpA
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Publication of EP2836316A1 publication Critical patent/EP2836316A1/de
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Classifications

    • 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
    • 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
    • B21B31/203—Balancing rolls
    • 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
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially

Definitions

  • the present invention relates to an integrated bending and balancing system for rolling stands for flat metal products, in particular suited for bending or curving work rolls or rolling rolls and for balancing the top back-up roll in a rolling stand provided with a shifting device for axially shifting the work rolls under load.
  • bending devices for bending or curving work rolls and the use of balancing devices for balancing the top back-up rolls are known in rolling stands for flat metal products, such as strips or sheets.
  • the function of said bending devices by means of their hydraulic pistons, is to bend the work roll so as to contrast the deformation caused by the rolling force or to provide the work rolls with a predetermined deformed shape.
  • a shifting device for axially shifting the work rolls, which allows, on one hand, to distribute the wear of the work roll itself tending to be located at the colder edges of the rolled strip in the case of campaigns with the same width, and, on the other hand, allows to control the output thickness of the product in a better manner if rolls with particular non-cylindrical profiles are used.
  • One of the current solutions requires the bending device to be fixed to the housing of the rolling stand.
  • the top and bottom hydraulic bending pistons operate directly on the horn of the respective top or bottom work chock.
  • a hydraulic cylinder is used to shift a work roll, which axially shifts the respective work chock and the respective work roll therewith, operating by means of a movable support guided in a frame fixed to the housing of the rolling stand.
  • US4907439 , US4934166 , US4967582 and US7895871 show some examples of rolling stands provided with bending devices and shifting devices.
  • the top back-up roll balancing devices are distinct and separate from the bending devices and are provided with one or more pistons which, either with or without levers, operate on beams with support the top back-up chocks.
  • the solution works but has some limits because of its considerable dimensions and costs.
  • JP62009708A describes instead a rolling stand in which the balancing device is fixed to the bending device.
  • Such a document discloses an integrated bending and balancing apparatus corresponding to the preamble of claim 1.
  • Another problem of the known solutions is that, during the axially shifting of the work rolls, opposite forces are induced in the axial shifting direction due to the friction which is inevitably generated between the bending pistons and the work roll chocks; said forces, operating on the bending pistons, can damage said bending pistons, in particular when said bending pistons are in extended position. Similarly, damage may occur to the sealing systems (packings and guide rings) of the bending cylinders.
  • the present invention thus aims to achieve the above-discussed objects by providing an integrated bending and balancing apparatus for bending and balancing rolls of a rolling stand which, in accordance with claim 1, is adapted to bend work rolls and to balance a top back-up roll of the rolling stand once the apparatus has been installed in the rolling stand, the apparatus comprising:
  • the balancing device is directly fixed to the bending device.
  • a second aspect of the present invention includes an integrated system for bending and balancing the rolls of a rolling stand comprising four integrated apparatuses according to claim 8.
  • a third aspect of the present invention includes a rolling stand comprising the aforesaid bending and balancing system in accordance with claim 10.
  • the invention includes a number of advantages over the traditional solutions of the prior art, in particular:
  • the figures show a preferred embodiment of an integrated system for bending work rolls and balancing the top back-up roll in a rolling stand, configured so as to allow the axial shifting under load of at least one of the work rolls.
  • a rolling stand for rolling flat metal products indicated as a whole by reference numeral 1 in Figure 10 , comprises:
  • the work rolls 2, 2' and the back-up rolls 4, 4' are arranged within a housing of the window or internal space of the rolling stand.
  • the rolling stand according to the invention is advantageously provided with actuating means for actuating the work rolls 2, 2', configured to transmit to at least one of the work rolls 2, 2' at least one translation motion along the respective longitudinal axis X.
  • Such actuating means comprise, for example, four shifting devices 7, 7' provided with a respective hydraulic cylinder 27. However, other types of actuating means may be included.
  • the first two shifting devices 7 are associated with the top work roll 2, while the two shifting devices 7' are associated with the bottom work roll 2' ( Figure 10 ).
  • FIG. 2 shows the two shifting devices 7 of the top work roll 2.
  • Each shifting device 7 comprises a main frame 26 fixed to an upright 6 of the housing of the rolling stand.
  • the axial shifting of the top work roll 2 occurs by means of the shifting cylinders 27, which by operating on a respective movable shifting block 28, shift the top work chocks 3.
  • Chocks 3 are made integral with the respective movable shifting block 28 by means of a locking bracket 29 which, if required when replacing the rolls, may be opened by releasing the chock and thus the work roll.
  • the bottom work roll 2' is shifted by means of the shifting devices 7', which are similar to the shifting devices 7 just described above.
  • An alternative variant may include only one shifting device for the top work roll 2 and only one shifting,device for the bottom work roll 2'.
  • the work rolls 2, 2' are opened, i.e. the work rolls are mutually spaced apart, at least sufficiently to allow the axial shifting of at least one of the work rolls, thus avoiding interferences between the components of said work rolls, e.g. between an annular protrusion of a work roll and the lining of the other work roll.
  • Such shifting devices allow, on one hand, to distribute the wear of the work rolls which is located at the coldest edges of the product being rolled in case of campaigns of the same width, and on the other hand, to control the output thickness of the product in a better manner if work rolls with particular profiles are used.
  • the rolling stand advantageously comprises a bending and balancing system provided with four integrated bending and balancing apparatuses 10, subject of the present invention.
  • Each integrated bending and balancing apparatus 10 is preferably arranged at a respective upright 6 of the housing of the rolling stand.
  • Each integrated bending and balancing apparatus comprises:
  • the bending device 8 is integrally fixed to the respective balancing device 12, e.g. by means of screws 20 or other suitable fastening means, making the entire apparatus more compact.
  • the balancing device 12 is fixed to the respective upright 6 of the housing of the rolling stand, e.g. by means of screws 19 or other suitable fastening means.
  • a first pair of cylinders consisting of a top bending cylinder 9 and of a bottom bending cylinder 9'
  • a second pair of cylinders consisting of the other top bending cylinder 9 and the other bottom bending cylinder 9', are symmetrically arranged with respect to the middle plane of the balancing device 12, which also divides the balancing cylinder 13 in half.
  • the top bending cylinders 9 are arranged opposite the respective bottom bending cylinders 9'.
  • a further advantage is that the balancing piston 14 of the cylinder 13 is configured to work directly on the chock 5 of the top back-up roll 4, without requiring intermediate levers which operate on support beams of the top back-up roll chocks.
  • an innovative configuration provides that the pistons 11 of the top bending cylinders 9 are integrally fixed to a top movable slider or support 15 sliding on a first end portion of the balancing device 12. Similarly, the pistons 11' of the bottom bending cylinders 9' are integrally fixed to a bottom movable slider or support 15' sliding on a second end portion of the balancing device 12. This configuration allows to protect the pistons of the bending cylinders from the axial forces due to the friction generated by the shifting of the work rolls, thus allowing the system to be also applied to rolling stands with large openings between the two work rolls and allowing to carry out the axial shifting under load.
  • piston 11 is integrally fixed to the top movable slider 15, by means of a screw 18 or other suitable fastening means, and is used to transmit a translation motion to said slider 15.
  • piston 11' is integrally fixed to the bottom movable slider 15', by means of a screw 18' or other suitable fastening means, and is used to transmit a translation motion to said slider 15'. Therefore, the top pistons 11, fitted on the bending devices 8, push through the top movable slider 15 on the top work roll chocks 3 thus curving the top work roll 2; while the bottom pistons 11', fitted on the bending devices 8, push through the bottom movable slider 15' on the bottom work roll chocks 3' thus curving the bottom work roll 2'.
  • the movable sliders 15, 15' have at least one surface facing the balancing device 12, having a profile substantially mating with and adjacent to the profile of said end portions of the balancing device 12, this configuration allows that, when one of said top work roll 2 and said bottom work roll 2' is translated by means of the shifting devices along a longitudinal axis thereof, the friction which is generated between the horns 30, 30' of the chocks 3, 3' of the work roll 2, 2' and said top movable slider 15 or said bottom movable slider 15' produces a force tangent to said top movable slider 15 or bottom movable slider 15', which is entirely relieved through said movable slider on the balancing device 12 and not on the pistons 11 or 11' of the bending cylinders.
  • top movable support 15 and the bottom movable support 15' having a C-shaped cross section along a horizontal plane such as to accommodate a segment of said first end portion and a segment of said second end portion of the balancing device 12, respectively, in their cavity.
  • the top movable slider 15 has five faces 21, 22, 23, 24, 25, facing the balancing device 12, defining a profile substantially mating with and adjacent to the profile of the corresponding faces of the first end portion of the balancing device 12. Faces 22, 23 and 24 define the C-shaped cavity which accommodates a segment of the balancing device 12 crossed by the balancing cylinder 13. Grooves, preferably filled with lubricant to reduce the wear which may occur when the movable slider 15 slides on the balancing device 12, are arranged at the edges of the faces 21, 22, 23, 24 and 25.
  • the above also applies to the bottom movable slider 15', with the difference that the segment of the balancing device 12 on which the slider 15' slides is not crossed by the balancing cylinder because this is not provided for the bottom back-up roll 4'.
  • Another advantage of the invention consists in providing, in every integrated apparatus 10, a protective plate 16 fixed to the top movable slider 15 and interposed between the top work roll chock 3 and the bending device 8, and sized so as to prevent water and scale, in the case of hot rolling stands, from depositing between the top movable slider 15 and the bending device 8, when piston 11 is at least partially outside the chamber of the bending cylinder 9.
  • the protective plate 16 may either be made in one piece with slider 15, or may be fixed to the body of the bending device 8 instead of to the movable slider 15, or may be made in one piece with the bending device 8.
  • a plate 16 is a distinct element fixed to the body of the bending device 8 or to the movable slider 15, said plate 16 can be removed if the amount of water and scale concerning the device is deemed such not to impair the operation thereof.
  • a further similar protective plate 17 can also be provided between the bottom work roll chock 3' and the bending device 8, and sized so as to prevent water and scales from depositing between the bottom movable slider 15' and the bending device 8 when piston 11' is at least partially outside the chamber of the bending cylinder 9'.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Control Of Metal Rolling (AREA)

Claims (14)

  1. Integrierte Biege- und Auswucht-Vorrichtung (10) zum Biegen und Auswuchten von Walzen eines Walzgerüsts, angepasst dafür, Arbeitswalzen (2, 2') zu biegen und eine obere Stützwalze (4) des Walzgerüsts auszuwuchten, sobald die Vorrichtung in dem Walzgerüst installiert wurde, wobei die Vorrichtung umfasst:
    - eine Biege-Vorrichtung (8), versehen mit wenigstens einem oberen Biege-Zylinder (9), angepasst dafür, auf einen Bremsschuh (3) einer oberen Arbeitswalze (2) einzuwirken, und mit wenigstens einem unteren Biege-Zylinder (9'), angepasst dafür, auf einen Bremsschuh (3') einer unteren Arbeitswalze (2') einzuwirken;
    - eine Auswucht-Vorrichtung (12), versehen mit wenigstens einem Auswucht-Zylinder (13), angepasst dafür, auf einen Bremsschuh (5) der oberen Stützwalze (4) einzuwirken, wobei die Auswucht-Vorrichtung (12) an der Biege-Vorrichtung (8) fixiert ist;
    - dadurch gekennzeichnet, dass ein Biege-Stempel (11) des wenigstens einen oberen Biege-Zylinders (9) integral an einem oberen bewegbaren Gleitelement (15) fixiert ist, das auf einem ersten End-Teil der Auswucht-Vorrichtung (12) gleitet, wodurch der Biege-Stempel (11) das obere bewegbare Gleitelement (15) auf den Bremsschuh (3) der oberen Arbeitswalze (2) durchdrücken kann; und
    - dadurch, dass ein Biege-Stempel (11') des wenigstens einen unteren Biege-Zylinders (9') integral an einem unteren bewegbaren Gleitelement (15') fixiert ist, das auf einem zweiten End-Teil der Auswucht-Vorrichtung (12) gleitet, wodurch der Biege-Stempel (11') das untere bewegbare Gleitelement (15') auf den Bremsschuh (3') der unteren Arbeitswalze (2') durchdrücken kann.
  2. Vorrichtung nach Anspruch 1, wobei das obere bewegbare Gleitelement (15) und das untere bewegbare Gleitelement (15') wenigstens eine Fläche aufweisen, die der Auswucht-Vorrichtung (12) gegenüber liegt und ein Profil aufweist, das im Wesentlichen dem Profil der End-Teile der Auswucht-Vorrichtung (12) entspricht und diesem benachbart ist.
  3. Vorrichtung nach Anspruch 2, wobei das obere bewegbare Gleitelement (15) und das untere bewegbare Gleitelement (15') einen C-förmigen Querschnitt entlang einer horizontalen Ebene aufweisen, so dass es in seiner Vertiefung ein Segment des ersten End-Teils bzw. des zweiten End-Teils unterbringt.
  4. Vorrichtung nach Anspruch 2 oder 3, wobei jeder Biege-Stempel (11, 11') integral an dem jeweiligen bewegbaren Gleitelement (15, 15') mittels einer Befestigungseinrichtung (18, 18') fixiert ist und so eine Verschiebe-Bewegung auf das bewegbare Gleitelement überträgt.
  5. Vorrichtung nach einem der Ansprüche von 2 bis 4, wobei eine Schutzplatte (16, 17) vorgesehen ist, die zwischen einem Bremsschuh (3, 3') wenigstens einer Arbeitswalze (2, 2') und der Biege-Vorrichtung (8) angeordnet ist und eine solche Größe aufweist, dass sie verhindert, dass sich Wasser und Zunder zwischen dem bewegbaren Gleitelement (15, 15') und der Biege-Vorrichtung (8) ablagern.
  6. Vorrichtung nach irgendeinem der vorangehenden Ansprüche, in der zwei obere Biege-Zylinder (9) und zwei untere Biege-Zylinder (9') vorgesehen sind.
  7. Vorrichtung nach Anspruch 6, wobei ein erstes Paar Zylinder, bestehend aus einem oberen Biege-Zylinder (9) und einem unteren Biege-Zylinder (9'), und ein zweites Paar Zylinder, bestehend aus dem anderen oberen Biege-Zylinder (9) und dem anderen unteren Biege-Zylinder (9'), symmetrisch in Bezug auf eine Mittelebene der Auswucht-Vorrichtung (12) angeordnet sind.
  8. Biege- und Auswucht-System zum Biegen und Auswuchten von Walzen eines Walzgerüsts, umfassend vier integrierte Biege- und Auswucht-Vorrichtungen (10) nach irgendeinem der vorangehenden Ansprüche, angepasst dafür, in Paaren an jeweiligen Enden der Arbeitswalzen (2, 2') des Walzgerüsts angeordnet zu werden.
  9. System nach Anspruch 8, wobei Einrichtungen zum axialen Verschieben eingeschlossen sind, um wenigstens eine der Arbeitswalzen (2, 2') entlang deren jeweiliger Längsachse zu verschieben, und die so konfiguriert sind, dass sie in Kooperation mit den integrierten Biege- und Auswucht-Vorrichtungen (10) arbeiten.
  10. Walzgerüst, umfassend
    - eine Stützwalze (4);
    - eine obere Arbeitswalze (2);
    - eine untere Arbeitswalze (2');
    - eine untere Stützwalze (4');
    - wobei ein Biege- und Auswucht-System gemäß Anspruch 8 eingeschlossen ist und wobei die vier integrierten Vorrichtungen (10) in Paaren an jeweiligen Enden der Arbeitswalzen (2, 2') angeordnet sind.
  11. Walzgerüst nach Anspruch 10, wobei in jeder integrierten Vorrichtung (10) die Auswucht-Vorrichtung (12) so konfiguriert ist, dass ein Auswucht-Stempel (14) des Auswucht-Zylinders (13) direkt auf den jeweiligen Bremsschuh (5) der oberen Stützwalze (4) einwirkt.
  12. Walzgerüst nach Anspruch 10 oder 11, wobei die Arbeitswalzen (2, 2') und die Stützwalzen (4, 4') in einem Gehäuse angeordnet sind und jede integrierte Vorrichtung (10) die jeweilige Auswucht-Vorrichtung (12) an dem Gehäuse fixiert aufweist.
  13. Walzgerüst nach Anspruch 12, wobei jede integrierte Vorrichtung (10) an einem jeweiligen Ständer (6) des Gehäuses angeordnet ist.
  14. Walzgerüst nach irgendeinem der Ansprüche von 10 bis 13, wobei Einrichtungen zum axialen Verschieben eingeschlossen sind, um wenigstens eine der Walzen obere Arbeitswalze (2) und untere Arbeitswalze (2') entlang einer jeweiligen Längsachse davon zu verschieben.
EP13725779.6A 2012-04-12 2013-04-12 Integrierte biegungs- und auswuchtungsvorrichtung für walzgerüste Active EP2836316B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000598A ITMI20120598A1 (it) 2012-04-12 2012-04-12 Sistema integrato di piegatura e di bilanciamento per gabbie di laminazione
PCT/IB2013/052910 WO2013153533A1 (en) 2012-04-12 2013-04-12 Integrated bending and balancing apparatus for rolling stands

Publications (2)

Publication Number Publication Date
EP2836316A1 EP2836316A1 (de) 2015-02-18
EP2836316B1 true EP2836316B1 (de) 2016-06-01

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EP13725779.6A Active EP2836316B1 (de) 2012-04-12 2013-04-12 Integrierte biegungs- und auswuchtungsvorrichtung für walzgerüste

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EP (1) EP2836316B1 (de)
CN (1) CN104271276B (de)
IT (1) ITMI20120598A1 (de)
RU (1) RU2584099C1 (de)
WO (1) WO2013153533A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900000713A1 (it) * 2019-01-17 2020-07-17 Danieli Off Mecc Sistema di bending e shifting per gabbie di laminazione

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1031544A1 (ru) * 1981-11-11 1983-07-30 Колпинское отделение Всесоюзного научно-исследовательского и проектно-конструкторского института металлургического машиностроения Предварительно напр женна прокатна клеть
JPH0679730B2 (ja) * 1985-07-08 1994-10-12 株式会社日立製作所 ロ−ルベンデイング装置
DE3638330A1 (de) * 1986-11-10 1988-05-19 Schloemann Siemag Ag Walzgeruest mit einer vorrichtung zum axialen verschieben von anstellbaren walzen
FR2611541B1 (fr) * 1987-02-27 1994-04-29 Clecim Sa Dispositif de reglage du profil et de repartition d'usure de cylindres dans un laminoir a cylindres deplacables axialement
SU1637892A1 (ru) * 1987-11-24 1991-03-30 Центральный научно-исследовательский институт черной металлургии им.И.П.Бардина Предварительно напр женна прокатна клеть
DE3815454A1 (de) * 1988-05-06 1989-11-16 Schloemann Siemag Ag Biege- und ausbalanciervorrichtung fuer axial verschiebbare walzen eines walzgeruestes
DE4314472A1 (de) * 1993-05-03 1994-11-10 Schloemann Siemag Ag Biegeblock zum Biegen der Walzen von Mehrwalzen-Walzgerüsten
FR2851942B1 (fr) * 2003-03-05 2006-04-28 Procede de changement de configuration d'un laminoir et laminoir perfectionne pour la mise en oeuvre du procede
DE10334682A1 (de) * 2003-07-30 2005-02-17 Sms Demag Ag Walzvorrichtung

Also Published As

Publication number Publication date
CN104271276A (zh) 2015-01-07
EP2836316A1 (de) 2015-02-18
WO2013153533A1 (en) 2013-10-17
RU2584099C1 (ru) 2016-05-20
ITMI20120598A1 (it) 2013-10-13
CN104271276B (zh) 2016-05-04

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