EP0040653A1 - Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud - Google Patents

Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud Download PDF

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Publication number
EP0040653A1
EP0040653A1 EP19800301621 EP80301621A EP0040653A1 EP 0040653 A1 EP0040653 A1 EP 0040653A1 EP 19800301621 EP19800301621 EP 19800301621 EP 80301621 A EP80301621 A EP 80301621A EP 0040653 A1 EP0040653 A1 EP 0040653A1
Authority
EP
European Patent Office
Prior art keywords
strip
leveler
roll
angle
side guide
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.)
Granted
Application number
EP19800301621
Other languages
German (de)
English (en)
Other versions
EP0040653B1 (fr
Inventor
Takeshi Masui
Yoshiro Masui
Teruo Hiramatu
Tomisabro Yamada
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to DE8080301621T priority Critical patent/DE3066142D1/de
Priority to EP19800301621 priority patent/EP0040653B1/fr
Publication of EP0040653A1 publication Critical patent/EP0040653A1/fr
Application granted granted Critical
Publication of EP0040653B1 publication Critical patent/EP0040653B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/021—Control or correction devices in association with moving strips
    • B21D43/023—Centering devices, e.g. edge guiding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0057—Coiling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B2015/0071—Levelling the rolled product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/006—Pinch roll sets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work

Definitions

  • the present invention relates to a method for preventing wandering of a strip in a hot rolling line and, more particularly, to a method for correcting hot rolled strip in which shape defects of the hot rolled strip are corrected in the hot rolling line and the wandering of the strip during the correction is prevented.
  • hot rolled strips were, after rolling in the continuous hot rolling mill, temper-rolled and simultaneously corrected in flatness. If the hot strip produced by such mill had satisfactory flatness it would have been possible to eliminate the temper rolling step. Heretofore, however, it was necessary to render the temper rolling to obtain the required flatness of the hot rolled strips.
  • the insufficient flatness of the hot rolled steel strips caused defective appearance of coil which presented noticeable problems in the succeeding producing steps such as, for example in the case of mother material for cold rolling, decrease in pickling efficiency resulted from decrease in passability of plates in the pickling line and wandering of the strip.
  • an object of the present invention is to prevent wandering of a strip under roller leveling in a hot rolling line, thereby stabilizing the flatness correction of the strip and improving the coil appearance of the strip.
  • At least one hot roller leveler comprising a plurality of leveler rolls is provided between the finishing rolling mill and the coiler of the hot rolling line to correct the flatness of the hot strip.
  • the hot roller leveler is constructed as follows:
  • a side guide is provided on an entrance side, or on an exit side, or on both sides of one or more hot roller levelers constructed as described above, to prevent the wandering of the strip.
  • a final mill stand and subsequent steps in the hot rolling line there are schematically illustrated examples of a final mill stand and subsequent steps in the hot rolling line.
  • one or more hot roller levelers 3 are provided between a final mill stand 1 of a finishing mill and a coiler 5 in the hot rolling line.
  • a strip 6 having emerged from the final stand 1 of the finishing mill passes a cooling water spray zone 2, is leveled by the hot roller leveler 3, passes through pinch rolls 4, and is coiled by the coiler 5.
  • the hot roller leveler 3 is provided in the neighborhood of the coiler 5 and preferably immediately before the pinch rolls 4.
  • the hot roller leveler 3 comprising a plurality of (three in the illustrated examples) leveler rolls 31 is provided in a single unit (Fig. 1) or in a plurality of units (Fig. 2).
  • the hot roller leveler 3 is constructed as follows:
  • Adjustment of angle of the leveler roll 31 in the horizontal plane is accomplished by, for example, the construction shown in Fig. 3, in which one bearing 7a of the leveler roll 31 is a pivot bearing and the other bearing 7b thereof is so constructed as to be slidably movable in the horizontal direction and is connected to a hydraulic cylinder 8 maintained horizontal.
  • the adjustment of angle of the leveler roll 31 in the vertical plane is accomplished by, for example, the construction shown in Figs. 4 and 5, in which one bearing 7c of the leveler roll 31 is so supported as to be pivotally movable in the vertical plane and the other bearing 7d is connected to the hydraulic cylinder 8 maintained vertical.
  • the adjustment of angle of the leveler roll 31 in the horizontal plane and in the vertical plane, respectively, is accomplished by, for example, the construction shown in Fig. 6, in which the bearings 7a and 7b shown in Fig. 3 are combined with the bearings 7c and 7d shown in Fig. 4 respectively.
  • roller leveler 3 comprising the three leveler rolls 31 is provided between the finishing mill 1 and the coiler 5
  • the roller leveler may be of a four-high type having back-up rolls for supporting deflection of the work rolls or may be of a two-high type having only the work rolls.
  • the wandering of the strip 6 traveling on the line can be corrected by adjusting the angle of the leveler roll 31 positioned on the upper side of the strip in combination with one or two of the two leveler rolls 31, 31 positioned on the under side of the strip.
  • Fig. 7 shows the results of test on the relation between an angle of inclination 6 in a horizontal plane of the leveler roll 31 and an amount of wandering Ax of the strip 6.
  • the horizontal axis denotes the angle of inclination 6 of the roll and the vertical axis denotes the amount of wandering per unit time ⁇ x/ ⁇ t.
  • the strip used in this test was a common hot-rolled steel strip of thickness of 1.6 - 3.2 mm and width of 900 - 1300 mm.
  • A indicates the case in which only the leveler roll 31 positioned at the left on the under side of the strip 6 was adjusted in angle
  • B indicates the case in which only the leveler roll 31 positioned on the upper.side of the strip 6 was adjusted in angle
  • C denotes the case in which all the three leveler rolls 31, 31, 31 were adjusted in angle.
  • Fig. 7 shows that in any of the cases, the greater the angle of inclination 6 of the roll is, the greater becomes the amount of wandering Ax of the strip 6 and that when the angle of inclination ⁇ of the roll varies in the reverse direction, the amount of wandering ⁇ x of the strip also varies in the reverse direction.
  • Fig. 7 shows further that the effect by adjustment of the angle of the leveler roll is greater in the intermediate roll than in the roll on the entrance or exit side and that the greatest effect is achieved by adjusting the angles of all the rolls.
  • the wandering of the strip can be canceled and prevented by adjusting the angle of at least one of the three leveler rolls 31 with the strip 6 in the horizontal plane.
  • Fig. 9 shows the results of test on the relation between the angle of inclination 8 of the roll and the amount of wandering ⁇ x of the strip 6 in the hot roller leveler having five leveler rolls 31 as shown in Fig. 8.
  • the vertical and the horizontal axes denote the same items as in Fig. 7.
  • D denotes the case in which one leveler roll 31 positioned at the left on the under side of the strip 6 is inclined in the vertical plane
  • E denotes the case in which one leveler roll 31 positioned at the left on the upper side of the strip 6 is inclined in the vertical plane
  • F denotes the case in which both said leveler rolls 31, 31 are inclined simultaneously in the vertical plane
  • G denotes the case in which one leveler roll 31 positioned at the left on the upper side of the strip 6 is inclined in the vertical plane and one leveler roll 31 positioned at the right on the under side of the strip 6 is simultaneously inclined in the horizontal plane.
  • the strip used in this test was a common hot-rolled steel strip of thickness of 1.2 - 3.2 mm and width of 900 - 1300 mm.
  • Fig. 9 shows that in any of the cases, the greater the angle of inclination 8 of the roll is, the greater becomes the amount of wandering ⁇ x of the strip and that when the angle of inclination ⁇ of the roll varies in the reverse direction, the amount of wandering ⁇ x of the strip also varies in the reverse direction.
  • Fig. 9 shows further that the effect by adjustment of the angle of the leveler roll is greater in the intermediate roll than in the roll on the entrance or exit side and that the effect is enhanced by combining the adjustment of the angle of inclination of the roll in the vertical plane with the adjustment of the angle of inclination of the roll in the horizontal plane.
  • angle of inclination of the roll in the vertical plane is preferably made small and the adjustment thereof is preferably combined with the adjustment of the angle of inclination of the roll in the horizontal plane.
  • a position-adjustable roller type side guide 9 as shown in Figs. 10 and 11 or a position-adjustable plate type side guide 10 as shown in Figs. 12 and 13.
  • the side guide 9 or 10 is provided either on the entrance side of the leveler 3 (Fig. 14) or on the exit side thereof (Fig. 15) or on each of the entrance and exit sides thereof (Fig. 16).
  • the side guide 9 or 10 is provided only on the entrance or on the exit side of each leveler or on each of said sides thereof as necessary.
  • the side guide 9 or 10 may be effectively provided in the manner as shown in any of Figs. 17 to 19.
  • the leveling operation according to the present invention can be easily automated by providing a sensor of the amount of wandering of the strip and connecting the output of the sensor to the means for adjusting the angle of the leveler roll.
  • the method according to the present invention provides additional advantages such as increase in descaling effect leading to increase in efficiency of the pickling line because the scale on the surface of the hot rolled strip is easily cracked by repeat bendings under tension width leveler rolls.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
  • Metal Rolling (AREA)
EP19800301621 1980-05-16 1980-05-16 Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud Expired EP0040653B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8080301621T DE3066142D1 (en) 1980-05-16 1980-05-16 Method for preventing wandering of strip under roller leveling in hot rolling line
EP19800301621 EP0040653B1 (fr) 1980-05-16 1980-05-16 Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800301621 EP0040653B1 (fr) 1980-05-16 1980-05-16 Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud

Publications (2)

Publication Number Publication Date
EP0040653A1 true EP0040653A1 (fr) 1981-12-02
EP0040653B1 EP0040653B1 (fr) 1984-01-18

Family

ID=8187165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800301621 Expired EP0040653B1 (fr) 1980-05-16 1980-05-16 Procédé pour éviter la déviation de bande pendant le nivellement dans un laminoir à chaud

Country Status (2)

Country Link
EP (1) EP0040653B1 (fr)
DE (1) DE3066142D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264163A1 (fr) * 1986-09-09 1988-04-20 Kawasaki Steel Corporation Procédé pour empêcher les mouvements transversaux d'une bande métallique
EP0745441A1 (fr) * 1995-06-03 1996-12-04 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Méthode et appareil pour la correction de la courbure latérale d'une bande métallique laminée, spécialement d'une bande métallique d'une épaisseur de 0,5 mm jusqu'a 2,0 mm
DE102017112424B4 (de) 2017-06-06 2023-02-23 Emg Automation Gmbh Vorrichtung und Verfahren zur Bandlageregelung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438231A (en) * 1967-02-28 1969-04-15 Manhattan Terrazzo Brass Strip Method and apparatus for removing edge camber from strips
DE2123896A1 (de) * 1970-10-20 1972-04-27 Vereinigte österreichische Eisen- und Stahlwerke AG, Linz (Österreich) Vorrichtung zum Richten von Blechstreifen
DE2461496A1 (de) * 1973-12-28 1975-07-10 Interlake Inc Einrichtung zum egalisieren von streifen unterschiedlicher breite
DE2537188A1 (de) * 1975-08-21 1977-02-24 Bwg Bergwerk Walzwerk Verfahren und warmbandstrasse zur verbesserung der qualitaetseigenschaften von warmband
DE2706943A1 (de) * 1977-02-18 1978-08-31 Bwg Bergwerk Walzwerk Verfahren und warmbandstrasse zum herstellen von duennem metallband, insbesondere metall-breitband, aus warmband
DE2742043A1 (de) * 1977-09-19 1979-04-05 Rheinische Eisengiesserei Wilh Richtmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3438231A (en) * 1967-02-28 1969-04-15 Manhattan Terrazzo Brass Strip Method and apparatus for removing edge camber from strips
DE2123896A1 (de) * 1970-10-20 1972-04-27 Vereinigte österreichische Eisen- und Stahlwerke AG, Linz (Österreich) Vorrichtung zum Richten von Blechstreifen
DE2461496A1 (de) * 1973-12-28 1975-07-10 Interlake Inc Einrichtung zum egalisieren von streifen unterschiedlicher breite
DE2537188A1 (de) * 1975-08-21 1977-02-24 Bwg Bergwerk Walzwerk Verfahren und warmbandstrasse zur verbesserung der qualitaetseigenschaften von warmband
DE2706943A1 (de) * 1977-02-18 1978-08-31 Bwg Bergwerk Walzwerk Verfahren und warmbandstrasse zum herstellen von duennem metallband, insbesondere metall-breitband, aus warmband
DE2742043A1 (de) * 1977-09-19 1979-04-05 Rheinische Eisengiesserei Wilh Richtmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264163A1 (fr) * 1986-09-09 1988-04-20 Kawasaki Steel Corporation Procédé pour empêcher les mouvements transversaux d'une bande métallique
EP0745441A1 (fr) * 1995-06-03 1996-12-04 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Méthode et appareil pour la correction de la courbure latérale d'une bande métallique laminée, spécialement d'une bande métallique d'une épaisseur de 0,5 mm jusqu'a 2,0 mm
AT406553B (de) * 1995-06-03 2000-06-26 Bwg Bergwerk Walzwerk Verfahren und vorrichtung zum korrigieren von gewalzten, in der bandebene horizontal gebogenen metallbändern, insbesondere von metallbändern mit einer banddicke von 0,5 mm bis 2,0 mm
DE102017112424B4 (de) 2017-06-06 2023-02-23 Emg Automation Gmbh Vorrichtung und Verfahren zur Bandlageregelung

Also Published As

Publication number Publication date
DE3066142D1 (en) 1984-02-23
EP0040653B1 (fr) 1984-01-18

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