EP0484584B1 - Cage de laminoir - Google Patents

Cage de laminoir Download PDF

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Publication number
EP0484584B1
EP0484584B1 EP19900121457 EP90121457A EP0484584B1 EP 0484584 B1 EP0484584 B1 EP 0484584B1 EP 19900121457 EP19900121457 EP 19900121457 EP 90121457 A EP90121457 A EP 90121457A EP 0484584 B1 EP0484584 B1 EP 0484584B1
Authority
EP
European Patent Office
Prior art keywords
rolls
roll
work
roll stand
rolling
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
EP19900121457
Other languages
German (de)
English (en)
Other versions
EP0484584A1 (fr
Inventor
Oskar Dipl.-Ing. Noé
Wilhelm Dipl.-Ing. Schwerdt
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.)
BWG Bergwerk und Walzwerk Maschinenbau GmbH
Original Assignee
BWG Bergwerk und Walzwerk Maschinenbau GmbH
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 BWG Bergwerk und Walzwerk Maschinenbau GmbH filed Critical BWG Bergwerk und Walzwerk Maschinenbau GmbH
Priority to EP19900121457 priority Critical patent/EP0484584B1/fr
Priority to DE90121457T priority patent/DE59003031D1/de
Priority to CA 2055184 priority patent/CA2055184A1/fr
Publication of EP0484584A1 publication Critical patent/EP0484584A1/fr
Application granted granted Critical
Publication of EP0484584B1 publication Critical patent/EP0484584B1/fr
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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/147—Cluster mills, e.g. Sendzimir mills, Rohn mills, i.e. each work roll being supported by two rolls only arranged symmetrically with respect to the plane passing through the working rolls

Definitions

  • the invention relates to a roll stand for the cold and hot rolling of flat material, in particular for reducing and skin-passaging metal strips, with two cambered work rolls, two support rolls being provided for the lower and / or upper work roll, which are used for the stepless change of the support effect by means of actuators are pivotally mounted around the work rolls.
  • a roll stand In order to change the crowning in the roll gap, a roll stand is known, in which two back-up rolls are provided for the unbombed lower and upper work rolls, which are pivoted in pairs around the work rolls for stepless change of the support effect by means of actuators. In this way, it is only possible to vary the support angle and thereby the support effect with respect to the unbombed work roll assigned in each case (see SU-A 1 514 435).
  • a roll stand in which support rolls are arranged or arranged after the work rolls, which are only slidably mounted.
  • the adjustment of the back-up rolls or the back and forth / up and down movement of the back-up rolls to compensate for the crowning takes place only within a very small range, since under certain circumstances if the back-up rolls move too far apart, contact with the assigned work roll and consequently, any support effect for this work roll can soon be lost (cf. FR-A-23 46 064).
  • the previously known measures are regularly complex, with the additional risk there is that the contact between work and backup rolls does not always remain.
  • the invention seeks to remedy this.
  • the invention has for its object to provide a roll stand of the type described above, in which a stepless change of the crowning in the roll gap during the rolling process is possible in a simple and quick manner by pivoting the support rollers, it also being ensured that the contact between Work and backup rolls are preserved under all conditions.
  • the crowning of the work rolls is designed for 100% of the maximum rolling force, so that when the rolling force drops, the deflection of the lower and / or upper work roll can be changed so that the sum of the bending deformation on the upper and lower work roll is the sum of the crowning used corresponds. It will preferably be limited to providing two supports only for the lower work roll.
  • the upper work roll is then equipped in a known manner by only a single backup roll and with an adjustment system. Assuming that the upper back-up roll and the two lower back-up rolls have the same diameter and the two lower back-up rolls are arranged with an exit angle of 45 ° to the center of the lower work rolls, the diameter ratio of the back-up rolls / work rolls is approx.2.4.
  • the two lower support rollers have the same support effect as the only upper support roller.
  • an increased spreading effect is achieved, which, however, permits an increased deflection of the lower work roll in order to always correct the bending line and consequently crown to achieve an ideal roll gap.
  • the invention provides that the lower and / or upper work roll are supported on the outer support rolls with the interposition of at least one intermediate roll, at least two support rolls on one Circular path is pivotally mounted around the center of the intermediate roller assigned to them for the stepless change of the supporting effect.
  • a height adjustment of the entire rolling stand can also be provided for the adjustment of the pass line.
  • the support rollers are preferably pivotably supported with segment-type bearing blocks with the interposition of rolling elements in a semi-cylindrical bearing shell. Storage in sliding or hydrostatic bearing shells is also possible.
  • the measures described achieve smooth pivoting of the support rollers. This is especially true when actuators, z. On the pedestals and on the stands of the rolling stand.
  • the invention further provides that support rollers and, if necessary, the intermediate rollers and the actuators are arranged axially symmetrically to a vertical axis of symmetry leading through the work rollers.
  • the support rollers can be pivoted individually or together by an equal or different pivot angle by means of the actuators. This means that the crowning can be changed continuously for every rolling process, even if it is not a reduction but only a dressing of the rolling stock.
  • the invention also relates to a method for changing the crowning of a work roll supported by means of two supporting rolls in the roll gap during the rolling process, depending on the respective rolling force, after which the supporting effect is achieved by pivoting the two pivotably mounted supporting rolls by one by the respective rolling force predetermined pivot angle on a circular path around the center of the work roll is continuously changed such that the sum of the deflections on the upper and lower work roll corresponds to the sum of the unused crowning.
  • the figures show a roll stand 1 for the cold and hot rolling of flat material, in particular for reducing and skin-passaging metal strips.
  • this roll stand has two cambered work rolls 2a, 2b and support rolls 3, 4 for these work rolls.
  • Two support rollers 4a, 4b are provided for the lower work roll 2b.
  • a backup roller 3 is sufficient for the upper work roller 2a. According to a variant, however, two backup rollers 3a, 3b are also provided.
  • the two support rollers 3a, 3b and 4a, 4b are pivotally mounted on a circular path B around the center M of the lower and upper work rollers 2a, 2b for continuously changing their support effect.
  • the support rollers 4a, 4b are mounted in segment-like bearing blocks 5.
  • the segment-like bearing blocks 5 are pivotally mounted in a semi-cylindrical bearing shell 7 with the interposition of rolling elements 6.
  • actuators 8 - according to the exemplary embodiment, hydraulically actuatable cylinder piston arrangements - are articulated.
  • the lower work roll 2b is supported with the interposition of an intermediate roll 9 on the two support rollers 4a, 4b, the support rollers 4a, 4b in this case on a circular path B1 around the center M1 of the intermediate roller 9 for continuous change the support is pivoted.
  • the support rollers 3a, 3b or 4a, 4b and, if appropriate, the intermediate roller 9 and the actuating drives 8 are arranged axially symmetrically with respect to a vertical axis of symmetry S leading through the work rollers 2a, 2b.
  • the support rollers 3a, 3b and 4a, 4b can be pivoted individually or together by an identical or different pivoting angle ⁇ by means of the actuators 8.
  • the swiveling of the two lower support rolls 4a, 4b (possibly also the two upper support rolls) continuously and quickly achieves a continuous change in the crowning of the work rolls 2a, 2b in the roll gap during the rolling process.
  • FIGS. 7 and 8 show the elastic bending behavior of the rolls at a pivoting position of 45 ° or 60 °.
  • the cambered work rolls 2a, 2b and support rolls 3, 4a, 4b are cylindrical and the elastic deflection is exaggerated. It can be seen that the elastic deflection 11 in the 60 ° swivel position is greater than the deflection 10 in the 45 ° swivel position.
  • the application of the teaching according to the invention is also possible for multi-roll mill stands if the diameter ratios are taken into account accordingly.
  • the 20-roll mill shown in Fig. 9 has, for example, eight support rollers 3, 4, of which two lower and two upper support rollers 4a, 4b and 3a, 3b around the center M1 of the intermediate roller 9 assigned to them for continuous change the support is pivoted.
  • the roll stand can be driven on the work rolls or backup rolls.
  • the rolling can be supported by appropriate strip pulls in front of and behind the roll gap.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Claims (7)

  1. Cage de laminoir (1) pour le laminage à froid et à chaud d'un matériau plat, en particulier pour la réduction et le dressage de bandes de métal, avec deux cylindres de travail bombés (2a, 2b), deux cylindres d'appui (3a, 3b et 4a, 4b) étant prévus respectivement pour le cylindre de travail inférieur et/ou le cylindre de travail supérieur (2, 2b), en étant montés de manière pivotante autour des cylindres de travail (2a, 2b) au moyen de mécanismes de réglage (8) pour faire varier progressivement l'effet d'appui,
    caractérisée en ce que les cylindres d'appui (3a, 3b et 4a, 4b) peuvent pivoter individuellement selon un angle de pivotement (α) égal ou inégal, sur une piste circulaire (B) autour du centre (M) du cylindre de travail inférieur ou supérieur (2a, 2b).
  2. Cage de laminoir (1) selon la revendication 1, caractérisée en ce que le cylindre de travail inférieur et/ou le cylindre de travail supérieur (2a, 2b) prennent appui sur les cylindres d'appui extérieurs avec interposition d'au moins un cylindre intermédiaire (9), au moins deux cylindres d'appui (3a, 3b et 4a, 4b) étant montés pivotants sur une piste circulaire (B₁) autour du centre (M₁) du cylindre intermédiaire (9) qui leur est associé, pour modifier progressivement l'effet d'appui.
  3. Cage de laminoir (1) selon la revendication 1 ou 2, caractérisée en ce que les cylindres d'appui (4a, 4b) sont montés pivotants sur des paliers (5) en forme de segments, avec interposition de rouleaux (6), dans une cuvette de support (7) semi-cylindrique, ou dans une cuvette de support à glissement ou hydrostatique.
  4. Cage de laminoir (1) selon une des revendications 1 à 3, caractérisée en ce que des mécanismes de réglage (8), par exemple des vérins hydrauliques ou pneumatiques, ou des vis sans fin actionnées mécaniquement, sont reliés aux paliers (5) et aux montants de la cage de laminoir (1).
  5. Cage de laminoir (1) selon une des revendications 1 à 4, caractérisée en ce que les cylindres d'appui (3a, 3b et 4a, 4b), et, le cas échéant, les cylindres intermédiaires (9) ainsi que les mécanismes de réglage (8) sont disposés symétriquement par rapport à un axe de symétrie vertical (S) passant par les cylindres de travail (2a, 2b).
  6. Cage de laminoir (1) selon une des revendications 1 à 5, caractérisée en ce que les cylindres d'appui (3a, 3b et 4a, 4b) sont pivotants individuellement ou ensemble selon un angle de pivotement (α) égal ou inégal, au moyen des mécanismes de réglage (8).
  7. Procédé pour modifier le bombé d'un cylindre de travail (2) soutenu par deux cylindres d'appui (4a, 4b) dans l'emprise pendant l'opération de laminage, en fonction de la force de laminage du moment, selon lequel l'effet d'appui est modifié progressivement par basculement des deux cylindres d'appui (4a, 4b) montés pivotants selon un angle de basculement (α) prédéterminé par la force de laminage du moment, sur une piste circulaire (B) autour du centre (M) du cylindre de travail (2b), de telle sorte que la somme des flexions des cylindres de travail supérieur et inférieur (2a, 2b) corresponde à la somme des bombés inutilisés.
EP19900121457 1990-11-09 1990-11-09 Cage de laminoir Expired - Lifetime EP0484584B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19900121457 EP0484584B1 (fr) 1990-11-09 1990-11-09 Cage de laminoir
DE90121457T DE59003031D1 (de) 1990-11-09 1990-11-09 Walzgerüst.
CA 2055184 CA2055184A1 (fr) 1990-11-09 1991-11-08 Support de laminoir

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19900121457 EP0484584B1 (fr) 1990-11-09 1990-11-09 Cage de laminoir

Publications (2)

Publication Number Publication Date
EP0484584A1 EP0484584A1 (fr) 1992-05-13
EP0484584B1 true EP0484584B1 (fr) 1993-10-06

Family

ID=8204698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900121457 Expired - Lifetime EP0484584B1 (fr) 1990-11-09 1990-11-09 Cage de laminoir

Country Status (3)

Country Link
EP (1) EP0484584B1 (fr)
CA (1) CA2055184A1 (fr)
DE (1) DE59003031D1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE566683C (de) * 1929-01-29 1934-10-31 Heraeus Vacuumschmelze A G Walzwerk mit Stuetz- und Arbeitswalzen
GB523777A (en) * 1938-12-14 1940-07-23 Robert Bass Rolling-mills
US2566679A (en) * 1943-02-25 1951-09-04 Armzen Company Rolling mill and lubrication method and means therefor
CH422686A (de) * 1963-02-28 1966-10-31 Lee Wilson Engineering S A Walzwerk zur Behandlung von Metallbändern und Verfahren zum Betrieb des Walzwerkes
FR2257360A1 (en) * 1974-01-14 1975-08-08 Inst Chernoi Metallurgii Rolling mill using rotating ring frames - to give rigid structure and reduce radial stress on bearings
FI64902C (fi) * 1976-03-30 1984-02-10 Wiik & Hoeglund Foerfarande foer kompensering av valsboejningen i en kalander
SU1514435A1 (ru) * 1988-01-28 1989-10-15 Dn Metall Inst Многовалковая прокатная клеть

Also Published As

Publication number Publication date
EP0484584A1 (fr) 1992-05-13
DE59003031D1 (de) 1993-11-11
CA2055184A1 (fr) 1992-05-10

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