EP0228691B1 - Laminoir pour prédécalaminage mécanique de feuillard d'acier - Google Patents

Laminoir pour prédécalaminage mécanique de feuillard d'acier Download PDF

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Publication number
EP0228691B1
EP0228691B1 EP86117915A EP86117915A EP0228691B1 EP 0228691 B1 EP0228691 B1 EP 0228691B1 EP 86117915 A EP86117915 A EP 86117915A EP 86117915 A EP86117915 A EP 86117915A EP 0228691 B1 EP0228691 B1 EP 0228691B1
Authority
EP
European Patent Office
Prior art keywords
rolls
steel strip
opposite directions
rolling
strip
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
EP86117915A
Other languages
German (de)
English (en)
Other versions
EP0228691A1 (fr
Inventor
Wilfried Bald
Karl-Ernst Boucke
Manfred Fritz
Friedrich Dr. Hollmann
Hans Römmen
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
Priority to AT86117915T priority Critical patent/ATE65949T1/de
Publication of EP0228691A1 publication Critical patent/EP0228691A1/fr
Application granted granted Critical
Publication of EP0228691B1 publication Critical patent/EP0228691B1/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
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/06—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing of strip material
    • 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
    • B21B13/142—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 by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/45—Scale remover or preventor
    • Y10T29/4517—Rolling deformation or deflection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/3042—Means to remove scale or raised surface imperfection

Definitions

  • the invention relates to a roll stand for the mechanical pre-descaling of hot-rolled steel strip by reducing rolls according to the push-rolling method.
  • a mechanical pre-descaling by grinding or milling according to DE-PS 886 585 does not allow the profile of the steel strip to be taken into account, so that metal is already removed in the middle if the scale has not yet been removed in the edge regions. Irradiating the surface of the steel strip with abrasive particles and a sludge-water mixture has not proven to be effective, so that here too, undesirable long lengths for a descaling line would be provided, and there is also a risk of damage to the belt surface (DE-PS 29 31 229).
  • DE-AS 12 48 600 proposed a method according to which the strip coming from the rolling mill should pass through a reducing roll stand under the action of strong tensile stresses.
  • the reducing roll stand has to be arranged in front of and behind corresponding roller assemblies which cause tensile forces, so that an undesirably long length is also required for descaling, and the effect achieved was considered inadequate.
  • an increased effectiveness of descaling is to be achieved by carrying out the reduction with simultaneous bending and pushing according to the push-rolling method.
  • a disadvantage here, as well as in the descaling according to DE-PS 29 31 229, is that the respective work rolls are wrapped around half by the incoming or outgoing steel strip, and a consideration of the strip profile is practically not possible, so that with conventional profiles the Steel strips with a slightly reinforced center of the roll gap can only be adapted to one load case of the roll gap by choosing the crowning.
  • the invention has for its object to provide a roll stand, with the help of a mechanical loosening, breaking or removing the scale is made possible without the running of the steel strip in this stand is complicated or it takes longer distances within the rolling line , and this brings about a reduction that can be uniformly adapted to different or changing profiles of steel strips.
  • the profile of the roll gap can be adapted to that of the steel strip, so that the steel strip is rolled out evenly over its entire width and, on the one hand, a uniform tendency to detach the scale layer is achieved while at the same time tension-free steel strip is reached.
  • the strip profile can be determined by detectors, so that the optimal axial displacement of the contoured rollers can be set independently and possibly also by means of a control device External bending forces that can be used to improve the roll gap profile formed can be determined.
  • predetermined further roll gap profiles by means of a preferably arbitrary further axial adjustment in order to thereby achieve corresponding profiles of the rolled steel strip.
  • the tensile stresses occurring in front of and behind the stand in the steel strip can be dimensioned such that no special drive apparatus or at least no rolls wrapped around the strip are required to maintain them, which could cause special problems when the strip runs in.
  • average peripheral speeds of the work rolls will be preferred, which lie between the pure push-rolling operation, in which one of the work rolls rotates at the strip inlet speed and the other at the strip outlet speed, and the usual peripheral speeds of the normal rolling operation, so that a mixed operation between normal rolling and push rollers is present.
  • the medium circumferential speed here denotes the circumferential speed occurring at a medium radius, in order to take into account that there is a special S-shaped bale cut, even if the amplitude of this S contour is only small.
  • the roll stands can be designed as two-roll stands or multi-roll stands, such as in particular four or six-roll stands.
  • the work rolls can be provided with the special grinding that shows S-shaped contours and can be designed to be axially displaceable; in the case of multi-roll stands, it is also possible to equip other rolls, for example intermediate rolls, with such a special grinding, and it is also possible to equip adjacent rolls, for example a work roll and an intermediate roll supporting it, with complementary special grinding.
  • the steel strip 1 schematically shows a cross section through a steel strip 1, both strengths and differences in strength being shown enlarged for better visibility.
  • the steel strip 1 has a symmetrical profile with a reinforced center, as is usually rolled, and which has proven itself with a slight center emphasis, in particular when inserting it into rolling stands.
  • the hot-rolled steel strip 1 is covered by a layer 2 of scale, which is to be removed before the subsequent cold rolling.
  • this steel strip designated 3 is passed between work rolls 4 and 5 of a roll stand, not shown.
  • the bales of these work rolls are provided with a special cut, which has an essentially S-shaped contour, and which is inversely provided for the two work rolls so that their contours complement one another as described, for example, in DE-PS 30 38 865 is.
  • the work rolls 4 and 5 are driven via spindles 6 and 7 by motors 8 and 9, optionally via interposed comb stands, so that they work according to the push-rolling method, more appropriately according to a mixing-push-rolling method:
  • the average peripheral speed of at least one of the work rolls is at the entry speed of the steel strip 3, while the other receives a peripheral speed that at most reaches the exit speed of the steel strip 3.
  • Hydraulic cylinders 12 and 13 act on the free roller journals 10 and 11, which, when acted on in opposite directions, also act in opposite directions Shifts of the work rolls in the direction of arrows 14 and 15 are able to cause.
  • the spindles 6 and 7 causing the drive are expedient for absorbing the displacement, constructed telescopically or through rotatably and axially displaceably comb rollers of a comb rolling stand.
  • Detectors 21 and 22 are directed onto the steel strip 3 both on the inlet side and in the outlet side, which in the illustrated case are designed as optical sensors and are intended to detect the surface of the strip and thus the profile.
  • the control device 23, shown as a block, is supplied with the output signals of the detectors from the left; on the upper side, it is supplied with actual values of the axial displacement, the setting, the setting and bending forces and the peripheral speeds of the work rolls, while the regulation of these values for flat or Tension-free steel strip are shown on the right-hand side: If necessary, the work rolls are expediently shifted in opposite directions by the same amount, and the adjustment as well as the bending forces and the peripheral speeds are set. If necessary, the determination of a specified profile can be initiated manually or by means of an additional medium.
  • the devices for moving the work rolls in opposite directions are expediently additionally provided on the drive side, and the scaffold supporting the work rolls, like the roll bending devices, can be designed in a customary and conventional manner.
  • the invention is not limited to the two-roll stand shown; the small diameter of the work rolls shown rather speaks for a four or six roll stand, although three and five roll stands are also possible. Any of these rollers can have the special bale cut, and the other rollers can be cylindrical or slightly spherical. However, it is also possible, for example, to equip four rolls with expediently differing special cuts in order to provide even further changes in the roll gap by axially displacing the rolls.
  • the breaking up of the scale but in particular the detachment of the scale layer, can be further improved while maintaining the desired profile by arranging two or possibly more of the stands in a row, and a further improvement, if necessary, is also possible by arranging grinding devices in particular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Crushing And Grinding (AREA)
  • Coating Apparatus (AREA)

Claims (1)

  1. Cage de laminoir pour pré-décalaminage mécanique de bandes en acier laminées à chaud par des cylindres réducteurs d'après le procédé de déplacement transversal des cylindres, dans laquelle les cylindres de travail ont des vitesses périphériques moyennes différentes l'une de l'autre, caractérisée en ce que la cage de laminoir comporte au moins deux cylindres (4, 5) qui se complètent et peuvent se déplacer axialement en sens inverse et dont les surfaces de table ont des contours en forme d'S disposés à l'inverse l'un de l'autre de telle manière que, dans une position axiale déterminée, ces contours se complètent sans lacune, en ce que la bande d'acier (3) passe dans les cylindres de travail en étant tendue et sans enroulement et en ce que la cage est précédée par un dispositif de commande (23) qui, en fonction du résultat de l'exploration effectuée par des détecteurs (21, 22) contrôlant le profil de la bande, règle le déplacement axial des cylindres (4, 5) comportant des contours en S ainsi que les forces de flexion extérieures (16 à 20) exercées sur les cylindres, de telle manière qu'il en résulte une bande d'acier (3) exempte de contraintes ou une bande d'acier ayant un profil déterminé à l'avance et que le dispositif de commande (23) détermine aussi bien la réduction de la bande d'acier que la force de laminage ainsi que les vitesses périphériques des cylindres de travail.
EP86117915A 1986-01-07 1986-12-22 Laminoir pour prédécalaminage mécanique de feuillard d'acier Expired - Lifetime EP0228691B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86117915T ATE65949T1 (de) 1986-01-07 1986-12-22 Walzgeruest zur mechanischen vorentzunderung von stahlband.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863600143 DE3600143A1 (de) 1986-01-07 1986-01-07 Walzgeruest zur mechanischen vorentzunderung von stahlband
DE3600143 1986-01-07

Publications (2)

Publication Number Publication Date
EP0228691A1 EP0228691A1 (fr) 1987-07-15
EP0228691B1 true EP0228691B1 (fr) 1991-08-07

Family

ID=6291432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86117915A Expired - Lifetime EP0228691B1 (fr) 1986-01-07 1986-12-22 Laminoir pour prédécalaminage mécanique de feuillard d'acier

Country Status (6)

Country Link
US (1) US4831854A (fr)
EP (1) EP0228691B1 (fr)
JP (1) JPS62158519A (fr)
CN (1) CN87100084A (fr)
AT (1) ATE65949T1 (fr)
DE (2) DE3600143A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3634367A1 (de) * 1986-10-09 1988-04-21 Schloemann Siemag Ag Walzen-anordnung zur verformungsfreien behandlung von bewegten bandfoermigen erzeugnissen
US4979556A (en) * 1989-04-04 1990-12-25 Hunter Engineering Company, Inc. Thickness control for a continuous caster
US6065319A (en) † 1996-09-11 2000-05-23 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Rolling mill with laterally different velocities
DE19961351C1 (de) * 1999-12-17 2001-10-11 Sundwig Gmbh Verfahren und Vorrichtung zum Verbinden der Enden von Metallbändern mittels Widerstandsschweißen
US6439883B1 (en) 2000-04-11 2002-08-27 Ajax Magnethermic Corporation Threading and scale removal device
CN102581046A (zh) * 2012-02-06 2012-07-18 生田（苏州）精密机械有限公司 干刷机刷子的运动机构

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2012849A (en) * 1933-03-08 1935-08-27 United Eng Foundry Co Descaling and edging apparatus
DE886585C (de) * 1941-11-04 1953-08-17 Administration Sequestre Des R Entzunderungseinrichtung fuer Werkstuecke
GB748196A (en) * 1952-11-05 1956-04-25 Chem Fab Budenheim Ag Apparatus for removing scale or rust from wire, metal strip or like elongated metal
DE1248600B (de) * 1957-07-27 1967-08-31 United States Steel Corp Verfahren und Vorrichtung zum mechanischen Vorentzundern von Bandstahl
US4162627A (en) * 1972-07-17 1979-07-31 Hitachi, Ltd. Rolling mill
SU560657A1 (ru) * 1975-05-26 1977-06-05 Предприятие П/Я Г-4586 Способ очистки металлической полосы от окалины
SU716662A1 (ru) * 1978-05-04 1980-02-28 Днепропетровский Металлургический Институт Способ удалени окалины с поверхности полосы
JPS5829171B2 (ja) * 1978-09-05 1983-06-21 石川島播磨重工業株式会社 熱延鋼帯のデスケ−リング方法
SU816600A1 (ru) * 1979-06-07 1981-03-30 Магнитогорский Дважды Орденаленина И Ордена Трудового Kpac-Ного Знамени Металлургическийкомбинат Им. B.И.Ленина Способ удалени окалины
JPS56119609A (en) * 1980-02-28 1981-09-19 Nippon Kokan Kk <Nkk> Differential rolling mill
US4519233A (en) * 1980-10-15 1985-05-28 Sms Schloemann-Siemag Ag Roll stand with noncylindrical rolls
SU1093379A2 (ru) * 1983-03-21 1984-05-23 Днепропетровский Металлургический Институт Им.Л.И.Брежнева Способ удалени окалины с поверхности полосы
JPS603912A (ja) * 1983-06-20 1985-01-10 Nippon Steel Corp 熱延板表面層のスケ−ル除去方法
US4656859A (en) * 1985-08-21 1987-04-14 Wean United, Inc. Rolling mill stand employing variable crown rolls and associated method

Also Published As

Publication number Publication date
ATE65949T1 (de) 1991-08-15
US4831854A (en) 1989-05-23
EP0228691A1 (fr) 1987-07-15
CN87100084A (zh) 1987-08-12
DE3680776D1 (de) 1991-09-12
DE3600143A1 (de) 1987-07-09
JPS62158519A (ja) 1987-07-14

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