EP0127590B1 - Cylindre pour les cages de laminoir à feuillard - Google Patents

Cylindre pour les cages de laminoir à feuillard Download PDF

Info

Publication number
EP0127590B1
EP0127590B1 EP84830148A EP84830148A EP0127590B1 EP 0127590 B1 EP0127590 B1 EP 0127590B1 EP 84830148 A EP84830148 A EP 84830148A EP 84830148 A EP84830148 A EP 84830148A EP 0127590 B1 EP0127590 B1 EP 0127590B1
Authority
EP
European Patent Office
Prior art keywords
roll
core
rings
shell
ring
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
Application number
EP84830148A
Other languages
German (de)
English (en)
Other versions
EP0127590A1 (fr
Inventor
Cesare Galletti
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.)
SMS Group SpA
Original Assignee
Innse Innocenti Santeustacchio SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Innse Innocenti Santeustacchio SpA filed Critical Innse Innocenti Santeustacchio SpA
Priority to AT84830148T priority Critical patent/ATE30682T1/de
Publication of EP0127590A1 publication Critical patent/EP0127590A1/fr
Application granted granted Critical
Publication of EP0127590B1 publication Critical patent/EP0127590B1/fr
Expired 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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/05—Sleeved rolls with deflectable sleeves

Definitions

  • the present invention relates to a roll for strip rolling mill stands, in particular but not exclusively for a backing roll in a four-high or six-high stand and possibly also as an intermediate roll in six-high stands.
  • a roll is of the type pointed out in the pre-characterising part of the claim.
  • the rolling mills presently used for producing strips are of the so-called four-high stand type (or four-high rolling mills) in which the rolling mill stands include four rolls, two working rolls in contact with the strip to be rolled and two backing rolls which bear on the working cylinders transmitting their rolling forces.
  • a rolling mill of the said type is designed to produce good results when working strips of a predetermined width ; when used to roll strips of different widths the resultant product is of notably inferior quality.
  • reaction forces are applied to the necks of the backing rolls to withstand and counter the pressure which the strip of sheet metal exerts on the rolls during rolling.
  • the backing rolls are thus forced to bend, their fibres being compressed by the strip, with resulting curving.
  • the working rolls follow the deformation of the backing rolls and, as a result, the rolled strip has a transverse section which, instead of being rectangular, tends to take on a form substantially like a biconvex lens, that is, with a greater thickness in the middle.
  • a further disadvantage is that, taking account of the relatively long lifetime of the rolls, which is of the order of several tens of years, there is often a problem of refurbishing existing installations in which the introduction of the new technology would involve, at a very high cost, the replacement of complete stands by the above-said special six-high stands.
  • the technical problem underlying this invention is that of making it possible to roll sheet metal strips of different widths accurately without the need to replace existing structures of rolling plants.
  • the conventional four-high stands already operating in the plant under consideration must, above all else, still be usable.
  • a four-high stand is schematically shown at 2 the uprights 6 and 7 whereof support a stiffening cross-beam 2a.
  • the stand 2 includes two backing rolls, 1, 3 and two working rolls 4 and 5 each rotatably supported by the uprights 6, 7 of the stand 2 in a conventional manner not shown in detail.
  • the backing roll 1 includes a cylindrical core 8 constituted by a larger-diameter central portion 9 and two identical portions 10, 11 of smaller diameter than the central portion 9 and extending symmetrically relative thereto.
  • the central portion 9 is encased by a cylindrical shell 8a rigid with the core 8.
  • portions 10, 11 of the core 8 coaxially mount a plurality of expansion rings each indicated 12 (in the example illustrated there are three rings 12 on each of the portions 10, 11).
  • the rings 12 are all identical and similarly arranged on their respective portions 10, 11 of the core 8.
  • the rings 12 touch each other and the shall 8a and are retained in this disposition by annular shoulders 15.
  • pressurised fluid in particular, oil
  • each expansion ring 12 is isotropically deformed from a contracted (inoperative) condition in which its outer diameter is less than the outer diameter of the shell 8a, to an expanded (operative) condition in which its outer diameter is the same as the outer diameter of the shell 8a.
  • Each expansion ring 12 has an outer cylindrical wall and an internal, conical wall with a taper that extends towards the shell 8a of the backing roll under consideration.
  • a support ring 14 is coaxially mounted on the corresponding portion 10, 11 of the core 8 and is movable axially within the chamber 13 formed between the ring 12 and the core 8.
  • the support ring 14 has an outer conical wall with the same taper and taper direction as that of the inner wall of the expansion ring 12.
  • annular chamber 18 is formed between the support ring 14, the corresponding portion 10, 11 of the core 8, and two annular seals 16,17 spaced axially on the portion 10, 11.
  • annular chamber 21 is formed between the support ring 14, the expansion ring 12 and two annular seals 19, 20 concentric with the annular seals 16, 17 mentioned above.
  • the chambers 18 and 21 are in fluid communication through a passage 22 extending radially through the support ring 14.
  • the support ring 14 has an axial length less than the axial length of the corresponding expansion ring 12 and hence of the chamber 13 in which it is axially movable.
  • annular chambers 23, 24 and 25 are defined between adjacent support rings 14, between one end support ring 14 and the portion 9, and between the other end ring and the annular shoulder 15. The sealing of these annular chambers against pressurised fluid is ensured by seals each schematically indicated 26.
  • a plurality of ducts generally indicated 27 extend axially through the core 8 of the backing roll under consideration and communicate at one end with a hydraulic control unit, not shown, and at the opposite end with each of the chambers 18-21, 23, 24 and 25.
  • the backing roll 1 is adapted for rolling a strip of a minimum width, and behaves as a backing roll of a width equal to the width of the shell 8a only.
  • the underlying working roll 4 is thus subject to thrust from the backing roll 1 over only its central part just as the opposing forces produced by the strip being rolled act only on this central part.
  • the working roll 4 thus only takes on the deformation of the central portion or shell of the backing roll 1, a deformation which is substantially zero.
  • the outer diameter of the cylindrical walls of the expansion rings is the same as the diameter of the shell 8a.
  • pressurised oil is delivered into the corresponding annular chambers 18 and 21 to expand the ring 12, and into the chamber 23 adjacent thereto to move the support ring 14 towards the shell 8a as the ring 12 expands.
  • a roll according to the invention thus allows the rolling of strips of different widths, with the resultant rolled strips having flat rectangular cross sections.
  • backing roll may be used either in an existing four-high stand, or in a conventional six-high stand as an intermediate roll.
  • either a single backing roll may be used as described above, acting on only one working roll, or a pair of backing rolls embodying the invention may be used each acting on a respective working roll in this case, naturally the effectiveness of the invention will be increased.
  • a backing roll according to the invention may be used together with conventional corrective loads further increasing the working precision. It will thus be clear that a backing roll according to the invention solves the technical problem previously explained, ensuring rolling results which are technically consistent, with reasonable production, installation and operating costs.

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Packaging Of Machine Parts And Wound Products (AREA)
  • Metal Rolling (AREA)

Claims (1)

  1. Cylindre (1) pour une cage de laminoir à feuillard comprenant un noyau cylindrique (8), un corps cylindrique (8a), monté autour de la partie centrale (9) dudit noyau (8), au moins une paire d'anneaux extensibles (12), montés autour du noyau (8) au niveau des extrémités opposées du corps (8a), lesdits anneaux (12) définissant avec les parties respectives (10, 11) du noyau (8) des chambres annulaires correspondantes (18, 21), des moyens (27) assurant le passage d'un fluide sous pression dans lesdites chambres (18, 21), de manière à provoquer une extension isotrope des anneaux correspondants (12), d'une position contractée à une position dilatée, caractérisé en ce que chacun des anneaux extensibles (12) présente une surface interne conique, et, en ce qu'un support conique d'anneau (14) est monté coaxiallement avec le noyau (8), afin d'effectuer un mouvement axial dans chacune des chambres (18, 21), le support d'anneau (14) jouant le rôle de câle de blocage pour l'anneau extensible correspondant (12), à la fois lors des positions contractée et dilatée.
EP84830148A 1983-05-27 1984-05-14 Cylindre pour les cages de laminoir à feuillard Expired EP0127590B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84830148T ATE30682T1 (de) 1983-05-27 1984-05-14 Walze fuer bandwalzgerueste.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2133883 1983-05-27
IT21338/83A IT1163408B (it) 1983-05-27 1983-05-27 Cilindro per gabbie di laminazione nastri, particolaremente quale cilindro di appoggio in gabbie quarto

Publications (2)

Publication Number Publication Date
EP0127590A1 EP0127590A1 (fr) 1984-12-05
EP0127590B1 true EP0127590B1 (fr) 1987-11-11

Family

ID=11180318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830148A Expired EP0127590B1 (fr) 1983-05-27 1984-05-14 Cylindre pour les cages de laminoir à feuillard

Country Status (4)

Country Link
EP (1) EP0127590B1 (fr)
AT (1) ATE30682T1 (fr)
DE (1) DE3467307D1 (fr)
IT (1) IT1163408B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2563449B1 (fr) * 1984-04-25 1994-04-15 Ishikawajima Harima Jukogyo Kk Perfectionnement aux cylindres de laminoir
GB2232106A (en) * 1989-05-16 1990-12-05 Davy Mckee Device for shaping an elongate product
US5001820A (en) * 1990-06-27 1991-03-26 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Roll for rolling mill
EP0542384B1 (fr) * 1991-11-13 1997-01-02 MANNESMANN Aktiengesellschaft Rouleau à dilatation commandée hydrauliquement
DE19835089C2 (de) * 1998-07-24 2000-08-24 Sms Demag Ag Stütz- oder Zwischenwalze in Walzwerken zum Walzen von flachem Walzgut

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2013961A1 (de) * 1970-03-24 1971-10-07 Demag Ag, 4100 Duisburg Walzscheibenbefestigung, insbeson dere fur mit fliegend gelagerten Walz scheiben versehene Drahtwalzwerke
US4026491A (en) * 1975-12-31 1977-05-31 Theodore Bostroem Winder drums for strip slitting lines
GB2094687B (en) * 1981-03-12 1985-01-23 Davy Loewy Ltd Rolling mill rolls

Also Published As

Publication number Publication date
IT1163408B (it) 1987-04-08
IT8321338A0 (it) 1983-05-27
ATE30682T1 (de) 1987-11-15
DE3467307D1 (en) 1987-12-17
EP0127590A1 (fr) 1984-12-05
IT8321338A1 (it) 1984-11-27

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