EP0134957B1 - Cage de laminoir avec cylindres de travail ajustables - Google Patents

Cage de laminoir avec cylindres de travail ajustables Download PDF

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Publication number
EP0134957B1
EP0134957B1 EP84107692A EP84107692A EP0134957B1 EP 0134957 B1 EP0134957 B1 EP 0134957B1 EP 84107692 A EP84107692 A EP 84107692A EP 84107692 A EP84107692 A EP 84107692A EP 0134957 B1 EP0134957 B1 EP 0134957B1
Authority
EP
European Patent Office
Prior art keywords
rolled
wear
roll stand
roll
rolls
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
EP84107692A
Other languages
German (de)
English (en)
Other versions
EP0134957A1 (fr
Inventor
Willi Benz
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 Siemag AG
Original Assignee
SMS Schloemann Siemag AG
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 SMS Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0134957A1 publication Critical patent/EP0134957A1/fr
Application granted granted Critical
Publication of EP0134957B1 publication Critical patent/EP0134957B1/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
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
    • B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/24—Roll wear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/14—Work rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/16—Intermediate rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B28/00—Maintaining rolls or rolling equipment in effective condition
    • B21B28/02—Maintaining rolls in effective condition, e.g. reconditioning
    • B21B28/04—Maintaining rolls in effective condition, e.g. reconditioning while in use, e.g. polishing or grinding while the rolls are in their stands

Definitions

  • the invention relates to a 4 or 6-roll stand with support rolls, optionally with intermediate rolls which can be displaced in the axial direction, and with work rolls which have a considerably longer bale length than the support rolls, and which are adjusted axially by about 0 from their symmetrical central position by means of adjusting devices. 5 times the bale length can be moved, as well as a method for operating it.
  • Roll stands are known, the work rolls of which can be displaced in order to allow the work roll bending to have a more intensive influence on the profile caused by the roll gap. A less favorable effect of roller wear is accepted.
  • it has proven useful to arrange the individual lots to be rolled during a rolling journey in such a way that medium-wide strips are started first and the widths of successive strips are then increased relatively quickly to the maximum width, and from this maximum width rolled with a continuously decreasing bandwidth.
  • the invention is based on the task of designing and operating a roll stand of the type specified in such a way that a considerably more uniform distribution of the wear occurring is effected and thus the service life of the work rolls between two roll changes is considerably increased, so that those caused by the work roll change Downtimes of the rolling mill are considerably reduced and the efficiency of the same is increased.
  • the bale length of the work rolls is at least 1.3 times the bale length of the back-up rolls in a roll stand corresponding to the genus, and in that the two work rolls can each be displaced in opposite directions from their symmetrical central position, and in addition a control device is assigned to the adjusting device which, by determining the axial displacement effective for one or more stitches, approximates as uniformly as possible a bale occupancy by, for each stitch of a rolled strip width with bale ends shifted in opposite directions, for example, onto the strip edges of the rolled strip, a further stitch causing the first corresponding grinding process, the first rolled strip width Roll strip width supplementing the full bale length takes place, in which the opposite bale ends are shifted to the opposite rolled strip edges.
  • bale width is used evenly, so that the wear is distributed over the entire bale width and a considerably longer service life of the work rolls is achieved through uniform wear.
  • greater wear in the area of the rolled strip edges can also be taken into account by selecting the bale length to be slightly larger, so that this increased wear is absorbed in the distances between the two wear figures, while likewise in the areas of the edge zones by statistically distributed or deliberate slight displacements a distribution can take place.
  • control device has a computer equipped with storage devices and stores the lots provided for a roller travel and sorts them to set up a shift program.
  • a more precise distribution of the wear can be achieved if the control device provides the batches with an additional evaluation, which takes into account the wear to be caused, during their storage and sorting, into which the strip length is included, and which, due to the stitch reduction, the deformation resistance of the rolled strip at the predetermined value Rolling temperature and the like can be added.
  • the control device can additionally cause periodically alternating displacements of small stroke, the amount and direction of which can be statistically distributed, but the strokes can also be programmed according to a predetermined scheme.
  • a 4-roll stand is shown, the support rolls 1 and 2 of working rolls 3 and 4, which are mounted in chocks which are not shown and which are guided in stands which are likewise not shown, between which a rolling strip 5 is rolled.
  • an input device 11 For inputting lots to be rolled, an input device 11 is provided which can be designed as a corresponding reader for manual input as a keyboard, for punched cards, punched cards, magnetic cards, magnetic tapes or the like, and which can also have a plurality of input paths, for example one Keyboard for manual entry, via a punch card and a magnetic tape reader.
  • the entered lots are stored in the storage device 12 and called up by a control device 13 which compares and sorts the lots.
  • An encoder 14 calls up the setting for the next lot in each case in operation, and the supply of the material intended for this is effected by a separate display device, control device or the like.
  • the adjustment of the respective axial displacement of the work rolls 3 and 4 is effected as a control process by means of a control device which receives the actual value of the settings from the displacement sensors 10 and the setpoint from the control device 13.
  • Control valves 16 and 17, which act on the cylinder spaces of the pressure medium cylinders 8 and 9, are arranged downstream of them until the difference between the setpoint and actual value disappears.
  • the support rollers 1 and 2 can, as is usually the case, also be mounted non-displaceably symmetrically in the stand. However, in order to facilitate rolling without tension, it is also possible to design the back-up rolls to be axially adjustable and, for example, to shift them into the position shown in FIG. 1.
  • FIG. 3 the resultant FIG. 25 is shown for explanation, in which the respective rolling stock widths and their relative position on the roll bale are indicated in the horizontal direction, while the chronological succession of the individual lots is indicated from top to bottom.
  • the partial figure 26 begins at the top with a lot of medium width, followed by lots with increasing rolling stock width until the dashed line 27 reaches the maximum bandwidth processed during this roll travel.
  • This increasing width is used in order to use only a part of the width of the cold roller, the thermal crown of which is not yet fully developed, but on the other hand to bring about heating relatively quickly by using relatively large widths of the roller barrel.
  • bale length exceeds that of the support rolls and possibly often intermediate rolls at least 0.3 times, better e.g. 0.5 times, so that the total bale length, for example the 1st , 5 times the bale length of the support rolls, and the slacks are rolled with axial settings of the work rolls and in a predetermined sequence, which is graphically illustrated by the two trapezoids 29 and 30 of FIG. 4.
  • the total bale length of the work rolls corresponds to the indicated arrow dimension 31, and, assuming that lots are normally processed in a roll travel, the width of which extends from 0.5 times the bale length of the work rolls to the full length, is shown in the bale area shown on the left first started with maximum widths, the rolled strips corresponding to the arrow size 32, and achieved by appropriate sorting that the width decreased continuously in the course of the roller travel until about half the bale width of the support rollers with the arrow size 33 was reached at the end with the usual statistical distribution.
  • sorting continues in a second sequence 30 with a rolling band width that increases during the roller travel, which here increases from half the bale width of the support rollers in accordance with arrow dimension 34 to the full bale width of the support rollers, arrow dimension 35.
  • the two trapezoids 29 and 30 result, if one starts from the transition zone, adds up a rectangle, which accordingly covers the entire bale width of the extended work roll.
  • the lots of the individual trapezoids 29 and 30 are not driven at the same time, but rather alternately.
  • a small space is deliberately shown between the trapezoids 29 and 30; Uniform wear also occurs here, since this strip migrates with the belt edges, which cause increased wear.
  • the band edge area indicated by the outside of the trapezoids is expediently distributed by small additional axial movements of the rollers; since a portion of the rollers is released at the same time, even wear can be achieved here with suitable control.
  • FIG. 4 shows idealized conditions, the prerequisite for which is an adequate distribution of the data of the lots to be rolled. In practice one has to comply with the orders placed, so that the operations shown in FIG. 4 can only be approximated in the area of the requirements. However, not only the number of lots and the bandwidth of the respective strip lengths will be taken into account, but the lots will each be given an assessment that corresponds to the wear and tear that will be caused by this lot.
  • the length of the respective rolled strip will be directly proportional to the wear caused by the lot, and further influences are, for example, the deformation resistance at the specified rolling temperature, the stitch reduction or reduction of the rolling stock, and also the roll diameter and the rolling speed, for example do not remain without influence on wear.
  • the respective lots will therefore be given a factor that corresponds to the wear to be expected.
  • FIG. 5 shows broken off a cross section through a work roll in the region of the bale end, in which, for better visibility in the respective thickness, overemphasized, the wear caused by successive slack is shown. This is based on the approximation that double wear is caused in a certain width range of the free band end as in the central regions of the band.
  • Fig. 5 shows broken off a cross section through a work roll in the region of the bale end, in which, for better visibility in the respective thickness, overemphasized, the wear caused by successive slack is shown. This is based on the approximation that double wear is caused in a certain width range of the free band end as in the central regions of the band.
  • a first area 38 is removed by the first lot from the bale 36 of the work roll 37, the band edge wear of which extends to the end of the bale.
  • the second lot is rolled in the same position and results in a wear area 39 which is stepped once. Fourfold wear is thus present in the end areas of the bale, and twice the simple wear in the middle of the band in the remaining bale areas.
  • the third lot is rolled inwards offset by the width of the belt edge wear and results in a wear area 40.
  • the following lot is again rolled with the belt edge at the end of the bale and results in a simply graduated wear area 41, and the following, fifth lot, rolled in the same position, results in a wear region 42 which is stepped in two steps.
  • the following sixth lot is in turn rolled offset inwards by the width of the strip wear and results in the stepped region 43, while the seventh batch moved inwards by twice the width of the strip edge wear results in the wear region 44. This shows that by slightly displacing the belt edges against the end of the bale, even in the areas where the belt edges run continuously and require increased wear, a compensation can be achieved by displacements.
  • processing devices can be assigned to the work rolls of the stand, which correct the bale profile of the rolls.
  • Processing devices of this type can apply material in particularly heavily worn areas, but it has proven useful to rework points of low wear by milling or grinding arrangements. This reworking can be carried out periodically and in such a way that an overall profile is revised, but only protruding points offer the tools areas of attack.
  • the result of such measurements can be used to trigger post-processing operations, the local approach is determined at the same time.
  • preheating can take place before the installation, and it is advantageous to maintain a relatively low roller temperature by means of an adequately dimensioned cooling, which can also be used for thermal control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)

Claims (10)

1. Cage de laminoir quarto ou sexto comportant des cylindres d'appui (1, 2, 18, 19), éventuellement des cylindres intermédiaires (20, 21) susceptibles d'être déplacés dans le sens axial ainsi que des cylindres de travail (3,4; 23, 24) qui ont une longueur de table très supérieure à celle des cylindres d'appui (1, 19) et qui, au moyen de dispositifs de réglage (8, 9), peuvent être écartés de leur position médiane symétrique d'une quantité égale à environ 0,5 fois la longueur de table, caractérisée en ce que la longueur de table des cylindres de travail (3, 4; 22, 23) est égale au moins à 1,3 fois la longueur de table des cylindres d'appui (1,2; 18, 19), en ce que les deux cylindres de travail (3,4; 20, 21) peuvent être écartés en sens inverse de leur position médiane symétrique et en ce que les dispositifs de réglage (8, 9) sont reliés à un dispositif de commande (13) qui, en déterminant le déplacement axial efficace pour une ou plusieurs passes, s'approche autant que possible d'une occupation uniforme de la table du fait que pour chaque passe affectant une largeur de bande laminée pour laquelle les extrémités de table sont déplacées en sens inverse à peu près jusqu'aux rives de la bande laminée (5) il y a une autre passe, produisant une usure correspondant à la première et affectant une largeur de bande complétant la première largeur de bande jusqu'à la largeur de table totale et pour laquelle les extrémités opposées de la table sont déplacées jusqu'aux rives opposées de la bande laminée.
2. Cage de laminoir selon la revendication 1, caractérisée en ce que le dispositif de commande (13) comporte un ordinateur qui est équipé d'une mémoire et enregistre les passes prévues pour une série d'opérations de laminage et les classe pour la mise au point d'un programme de déplacements.
3. Cage de laminoir selon l'une des revendications 1 ou 2, caractérisée en ce que le dispositif de commande (13) associe aux passes, au moment de leur enregistrement en mémoire et de leur classement, une valeur supplémentaire qui tient compte de l'usure à obtenir, dans laquelle intervient la longueur de bande et qui peut être complétée par la réduction aux différentes passes, par la résistance de la bande à la déformation et par des facteurs analogues.
4. Cage de laminoir selon l'une des revendications 1 à 3, caractérisée en ce que le dispositif de commande (13) produit, en plus, des déplacements périodiques alternatifs d'amplitude faible statistiquement répartie.
5. Cage de laminoir selon l'une des revendications 1 à 4, caractérisée en ce que le dispositif de commande (13) produite, en plus, des déplacements périodiques alternatifs d'une amplitude faible qui représente de une à plusieurs fois la largeur de la zone d'usure marginale renforcée.
6. Cage de laminoir selon l'une des revendications 1 à 5, caractérisée par des dispositifs d'usinage associés aux cylindres de travail (3, 4; 22, 23) et rectifiant leur profil de table.
7. Cage de laminoir selon l'une des revendications 1 à 6, pour le laminage d'un grand nombre de lots de même largeur de produits laminés, caractérisée en ce que la longueur de table des cylindres de travail est un multiple, au moins le double, de la largeur du produit laminé.
8. Procédé d'utilisation d'une cage de laminoir selon l'une des revendications 1 à 6, caractérisé en ce que les lots qui doivent être laminés dans une série d'opérations de laminage sont classés de telle manière que chaque fois deux largeurs de bande laminée se complétant à peu près jusqu'à la longueur de table dont laminées quand des cylindres de travail sont décalés dans le sens axial de telle manière qu'elles sont laminées en contact avec des zones de table séparées faisant suite chacune à l'une des zones de table voisines des extrémités de table.
9. Procédé d'utilisation d'une cage de laminoir selon la revendication 6, caractérisé en ce que les lots sont classés en faisant intervenir une valeur tenant compte de l'usure des cylindres produits par eux.
10. Procédé d'utilisation de laminoirs selon la revendication 9, caractérisé en ce que pour la détermination de la valeur de la longueur du produit laminé, la résistance à la déformation du produit laminé à la température de laminage, la réduction aux différents passes, la vitesse de laminage et des facteurs analogues sont pris en compte.
EP84107692A 1983-07-18 1984-07-03 Cage de laminoir avec cylindres de travail ajustables Expired EP0134957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833325823 DE3325823A1 (de) 1983-07-18 1983-07-18 Walzgeruest mit axial verschiebbaren arbeitswalzen
DE3325823 1983-07-18

Publications (2)

Publication Number Publication Date
EP0134957A1 EP0134957A1 (fr) 1985-03-27
EP0134957B1 true EP0134957B1 (fr) 1988-05-18

Family

ID=6204238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107692A Expired EP0134957B1 (fr) 1983-07-18 1984-07-03 Cage de laminoir avec cylindres de travail ajustables

Country Status (4)

Country Link
US (1) US4627260A (fr)
EP (1) EP0134957B1 (fr)
JP (1) JPS6040606A (fr)
DE (2) DE3325823A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6293017A (ja) * 1985-10-21 1987-04-28 Nippon Steel Corp 圧延における板プロフイル制御方法
DE3624241C2 (de) * 1986-07-18 1996-07-11 Schloemann Siemag Ag Verfahren zum Betrieb eines Walzwerkes zur Herstellung eines Walzbandes
GB2279023B (en) * 1993-04-27 1996-06-05 Ward Building Systems Ltd Rolling mill
ATE195674T1 (de) * 1994-05-30 2000-09-15 Andrzej Korbel Verfahren zur plastischen verformung von materialien
DE19736767C2 (de) * 1997-08-23 2003-10-30 Sms Demag Ag Walzgerüst zum Walzen von Bändern
US5970771A (en) * 1998-07-10 1999-10-26 Danieli United Continuous spiral motion system for rolling mills
IT1315120B1 (it) * 2000-09-25 2003-02-03 Danieli Off Mecc Dispositivo e metodo per lo spostamento assiale dei cilindri di unagabbia di laminazione.

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2047883A (en) * 1935-09-03 1936-07-14 Charles W Phillips Rolling mill
DE1037804B (de) * 1954-10-01 1958-08-28 E H Oskar Waldrich Dr Ing Einrichtung an Walzenstuehlen zum Nacharbeiten der Walzen im eingebauten Zustand
JPS517635B2 (fr) * 1971-12-10 1976-03-09
JPS527425B2 (fr) * 1972-07-07 1977-03-02
US4162627A (en) * 1972-07-17 1979-07-31 Hitachi, Ltd. Rolling mill
JPS5573403A (en) * 1978-11-28 1980-06-03 Nippon Steel Corp Rolling method for reducing local abrasion of roll
JPS57137007A (en) * 1981-02-16 1982-08-24 Ishikawajima Harima Heavy Ind Co Ltd Rolling mill
JPS583705A (ja) * 1981-06-29 1983-01-10 Ishikawajima Harima Heavy Ind Co Ltd 圧延機
JPS5855103A (ja) * 1981-09-30 1983-04-01 Hitachi Ltd 重ね板圧延方法
JPS5868403A (ja) * 1981-10-19 1983-04-23 Sumitomo Metal Ind Ltd パタ−ンレス圧延方法
SE8300358D0 (sv) * 1982-04-30 1983-01-25 Hoesch Werke Ag Anordning for formstyrning av valsar i metallvalsverk
DE3245090A1 (de) * 1982-12-06 1984-06-07 SMS Schloemann-Siemag AG, 4000 Düsseldorf Verfahren und einrichtung zum walzen von metallbaendern

Also Published As

Publication number Publication date
EP0134957A1 (fr) 1985-03-27
DE3325823A1 (de) 1985-01-31
DE3471265D1 (en) 1988-06-23
JPS6040606A (ja) 1985-03-04
US4627260A (en) 1986-12-09
JPH0459048B2 (fr) 1992-09-21

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