US3344637A - Strip rolling mill system and process - Google Patents

Strip rolling mill system and process Download PDF

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Publication number
US3344637A
US3344637A US429352A US42935265A US3344637A US 3344637 A US3344637 A US 3344637A US 429352 A US429352 A US 429352A US 42935265 A US42935265 A US 42935265A US 3344637 A US3344637 A US 3344637A
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United States
Prior art keywords
strip
metal
rolls
rolling
roll
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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
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US429352A
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English (en)
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Natalis H Polakowski
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Individual
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Priority to US429352A priority Critical patent/US3344637A/en
Priority to GB346/66A priority patent/GB1129771A/en
Priority to FR46061A priority patent/FR1463662A/fr
Priority to DE19661527677 priority patent/DE1527677A1/de
Priority to SE1132/66A priority patent/SE302441B/xx
Priority to BE675899D priority patent/BE675899A/xx
Application granted granted Critical
Publication of US3344637A publication Critical patent/US3344637A/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B21B37/48—Tension control; Compression control
    • B21B37/50—Tension control; Compression control by looper control
    • 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
    • B21B1/30—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 non-continuous process
    • 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
    • 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
    • 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
    • B21B1/30—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 non-continuous process
    • B21B1/32—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/36—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 non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by cold-rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2203/00—Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods
    • B21B2203/18—Rolls or rollers
    • B21B2203/187—Tilting rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2263/00—Shape of product
    • B21B2263/04—Flatness
    • 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
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B21B39/08—Braking or tensioning arrangements

Definitions

  • ABSTRACT OF THE DISCLOSURE The invention is addressed to a mill for rolling metal sheets, strips and the like wherein the metal is passed between reducing rolls for decreasing its thickness and in which the improvement is addressed to means adapted to twist the sheet or strip relative to the rolling plane selectively to increase the tension along the lateral edges of the metal for corresponding increase in elongation to offset the over-rolling at the center of the strip by the reducing rolls whereby a more uniform rolled product will result and in which the twisting means comprises the combination of aligned deflector rolls contacted by one surface of the metal and a flexing roll adapted to contact the opposite surface of the metal between the deflector rolls and means for adjustment of the flexing roll relative to the rolling plane of the metal.
  • This invention relates to an integrated equipment system and processing method for the rolling of metal in strip form. Its purpose is to secure products such as sheet, strip or foil of improved flatness compared with what can be achieved with conventional rolling mills and methods.
  • certain camber controlling devices involving bending of the work rolls or the backing rolls are increasingly used to compensate for variable roll deflection, wear, and non-uniform thermal dilatation.
  • those based on bending the work rolls by loading their chocks with the aid of hydraulic cylinders have a small corrective effect because of journal pressure limitation.
  • those based on direct bending of the backing rolls are very expensive and unsuitable for mounting on existing, conventional rolling mills.
  • FIGURE 1 is a schematic illustration of a rolling mill system including the operating mechanisms of this invention
  • FIGURE 2 is a view of the system of FIGURE 1 taken about the line 22;
  • FIGURE 3 is a schematic illustration of a modified form of the invention.
  • the construction of this invention generally comprises means for twisting the span of the metal strip between the payoff reel and the rolling stand relative to the pass plane while said strip is under tension.
  • the twisting action which will be described in detail hereinafter, redistributes the total tension by transferring a larger proportion thereof onto the side, or edge portions of the strip while relieving it in the center part.
  • said strip is flexed by running it over a small diameter roller and it undergoes a plastic extension (stretch), said extension being substantially proportional to the tension per square inch for any fixed flexing roller diameter.
  • the construction of this invention is capable of providing a more uniform rolled product by reason of this compensation of extensions across the strip.
  • FIGURE 1 illustrates a rolling stand with work rolls 1 and 2 and backing rolls 3 and 4. It will be understood that the mill for reducing of the metal may be of any conventional type and that the arrangement illustrated is only one typical example.
  • a strip flexing assembly including backup roll 5, deflector rolls 6 and 7 and flexing roll 8.
  • the general arrangement illustrated is of the same type as the arrangement shown in FIGURE 2 of applicants copending application Ser. No. 390,167, now Patent No. 3,270,543.
  • the metal to be flexed is passed in contact with the roll 6, then over flexing roll 8 and finally in contact with deflector roll 7.
  • the flexing roll 8 is of a small diameter so that a significant plastic strain in the strip and a substantial angle of flexural contact is achieved.
  • Backup roll 5 supports roll 8 against bending.
  • the illustrated system also includes takeup reel 9*, payoff reel 10 and idler rollers 11 and 12. These last mentioned portions of the described system are considered conventional and various other well-known arrangements for handling of the strip 13 are contemplated for use in the system of this invention.
  • FIGURE 2 illustrates the manner in which the deflector rolls 6 and 7, flexing roll 8 and backup roll 5 are mounted. It will be noted that common journals 14 and 14 are provided for the rolls 5, 6 and 7. Furthermore, these provide for vertical movement of the journals so that the angle of the rolls 5, 6 and 7 can be changed relative to the reducing rolls 3 and 4.
  • the strip 13 is passed from the payoff reel 10 over the idler 12 and then through the flexing cluster of rolls 5, 6, 7 and 8. With this cluster inclined at an angle as illustrated in the drawings, the strip will be twisted relative to its position as it passes through rolls 1 and 2.
  • the strip is normally under tension during its traverse prior to entry between the reducing rolls; however, with the amount of back tension normally used, there will be little perceptible elongation in the strip.
  • tensions are built-up in the edges of the strip, and these tensions are substantially greater than the average tensions in the strip. Accordingly, due to combined action of tension and flexure, the edges of the strip will elongate prior to entering the work rolls bight, and the amount of this extension can be controlled by varying the tilt.
  • the strip reaches the work rolls, there is a tendency for greater pressure to be exerted upon its center portions because of the pre-ground camber and the thermal camber so that the center obtains a greater extension.
  • the combination 5, 6, 7 and 8 can be associated with a rolling stand having work rolls 1 and 2 which are ground to produce flat strip when the rolls are cold.
  • the rolls 1 and 2 will begin to swell at the center and, therefore, there will be a tendency for the strip to elongate preferentially in the center area.
  • the edges of the strip can be pre-stretched to compensate for the excessive elongation which will take place at the center of the strip as it passes through the work rolls.
  • the aforesaid operation could be performed after the strip passes through the work rolls, it is preferred to provide for pre-stretching since the appearance (brightness) of the sheet will be more uniform when all of the compensating extension is introduced before or during contact with the work rolls. Furthermore, the prestretching takes place in a low tension location since the front tension between the mill and the takeup reel 9 is normally much higher than the back tension. The prestretching, therefore, minimizes any likelihood of tearing of the strip.
  • the twisting action is transmitted to the work rolls 1 and 2 and to reel 10. This may cause the strip to slightly drift sidewise. To prevent this, it may be advantageous to install two parallel guiding strands, as shown in FIGURE 3, having rolls 31-32 and 33-34, respectively. These guiding devices are not driven (idlers), and their rolls are spaced apart sufficiently to engage the strip without rolling it. The twisting action is then confined to the metal span between the two guide stands and will not affect the coil or work rolls.
  • the selective increase in tension in the lateral edges of the strip can be accomplished solely due to the twisting action which is achieved.
  • the twisting action will produce sufficient increase in tension to compensate for elongation in the center of the strip during working where such elongation is of a relatively low magnitude.
  • the small diameter flexing roll is preferably utilized in this invention since this roll will, in itself, produce plastic strain in the strip. Obviously, the smaller the diameter of the roll 8, the less tension will be needed to differentially stretch the strip. Where relatively great elongation is anticipated at the center of the metal during reduction of the metal by the reducing rolls, a greater compensating extension of the lateral edga can be achieved by the combination of a small diameter flexing roll and the twisting action. A strip twisting action alone can be employed for small corrections, but it is dangerous beyond a certain point since the tension in the edges produced by twisting may reach a level which would cause tearing in the lateral edges. Where the small diameter flexing roll is employed, the diameters preferably extend between about inch and /1 inch for strips from 0.002 to 0.025 inch thick.
  • the arrangement of this invention can be employed in combination with a reversing mill by providing one twisting means on either side of the mill.
  • the twisting means on the forward side of the mill can be made inoperative by removing the roll 8 or by opening the gap between the rolls by moving backup roll 5 away from rolls 6 and 7.
  • the flexing roll 8 is preferably a floating roll with its sole support being provided by the backup roll 5 and without the ends being confined against movement in the rolling direction by a fixed journal housing.
  • other strip flexing devices can be used for the same purpose and with the same over-all effect, provided they incorporate the lateral tilting principle described herein.
  • the improvement comprising means adapted to twist said metal relative to the rolling plane for selectively increasing the tension of the lateral edges of the metal to increase the elongation in said edges and thereby offset the over-rolling of the center of the strip by the reducing rolls whereby a more uniform rolled product will result, in which said twisting means comprise the combination of a pair of aligned deflector rolls adapted to contact one surface of said metal, a flexing roll situated between said deflector rolls and adapted to contact the other surface of said metal whereby said metal is flexed when passing over said rolls, and a backup roll for said flexing roll.
  • a rolling mill in accordance with claim 1 wherein said means for twisting of the metal is located between said reducing rolls and a payofi reel for said metal.
  • a rolling mill in accordance with claim 1 comprising a reversing mill, one of said twisting means being located on either side of said reversing mill for individually handlng said metal depending on the direction of operation of said mill, and means for making one of said twisting means inoperative while the other twisting means handles said metal.
  • a rolling mill in accordance with claim 1 including means for adjusting the degree of twisting action of said twisting means.
  • the improvement comprising means adapted to twist said metal relative to the rolling plane for selectively increasing the tension in the lateral edges of the metal, and a small diameter flexing roll associated with said twisting means whereby the elongation of said strip in said edges is increased to thereby offset the over-rolling of the center of the strip by the reducing rolls to achieve a more uniform rolled product.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US429352A 1965-02-01 1965-02-01 Strip rolling mill system and process Expired - Lifetime US3344637A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US429352A US3344637A (en) 1965-02-01 1965-02-01 Strip rolling mill system and process
GB346/66A GB1129771A (en) 1965-02-01 1966-01-04 Strip rolling mill
FR46061A FR1463662A (fr) 1965-02-01 1966-01-17 Appareil et procédé pour le laminage des bandes
DE19661527677 DE1527677A1 (de) 1965-02-01 1966-01-26 Verfahren und Vorrichtung zum Kalzwalzen von Metallband
SE1132/66A SE302441B (ja) 1965-02-01 1966-01-28
BE675899D BE675899A (ja) 1965-02-01 1966-02-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US429352A US3344637A (en) 1965-02-01 1965-02-01 Strip rolling mill system and process

Publications (1)

Publication Number Publication Date
US3344637A true US3344637A (en) 1967-10-03

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US429352A Expired - Lifetime US3344637A (en) 1965-02-01 1965-02-01 Strip rolling mill system and process

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US (1) US3344637A (ja)
BE (1) BE675899A (ja)
DE (1) DE1527677A1 (ja)
FR (1) FR1463662A (ja)
GB (1) GB1129771A (ja)
SE (1) SE302441B (ja)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429165A (en) * 1966-06-07 1969-02-25 Forges De La Loire Cie Des Ate Metal strip planing machines operating by alternate bendings
US3565160A (en) * 1966-11-10 1971-02-23 Curt Herrmann Arc type continuous casting plant
DE1752052A1 (de) * 1968-03-27 1971-05-13 Rasselstein Ag Vorrichtung zur Vermeidung von Bandunebenheiten beim Kaltwalzen von Baendern
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
DE3635088A1 (de) * 1986-10-15 1988-04-28 Bwg Bergwerk Walzwerk Verfahren und walzstrasse zum herstellen von metallband in einem walzprozess
US4782683A (en) * 1986-03-03 1988-11-08 Tippins Incorporated Hot strip mill shape processor and method
US5687595A (en) * 1995-06-03 1997-11-18 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for correcting curvature of rolled metal strip
US6439022B1 (en) * 1999-11-26 2002-08-27 Honda Giken Kogyo Kabushiki Kaisha Rolling apparatus
US20090321491A1 (en) * 2008-06-06 2009-12-31 Wick William R W Edge Detection System
EP2329909A4 (en) * 2008-07-11 2017-03-08 Primetals Technologies Japan, Ltd. Method and apparatus for bonding metal plates
CN106670242A (zh) * 2017-02-09 2017-05-17 广西南南铝加工有限公司 在线控制离线带材板形的装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241995A1 (de) * 1981-11-13 1983-05-26 Sumitomo Metal Industries, Ltd., Osaka Verfahren zum korrigieren von gewalztem material
DE3405146C1 (de) * 1984-02-14 1985-02-14 Sundwiger Eisenhütte Maschinenfabrik Grah & Co, 5870 Hemer Walzgeruest und Verfahren zum Planwalzen von Metallband in einem Walzgeruest

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039513A (en) * 1960-04-13 1962-06-19 Gpe Controls Inc Roll position control
US3081651A (en) * 1960-04-28 1963-03-19 United States Steel Corp Method and apparatus for correcting gage of strip during rolling

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039513A (en) * 1960-04-13 1962-06-19 Gpe Controls Inc Roll position control
US3081651A (en) * 1960-04-28 1963-03-19 United States Steel Corp Method and apparatus for correcting gage of strip during rolling

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3429165A (en) * 1966-06-07 1969-02-25 Forges De La Loire Cie Des Ate Metal strip planing machines operating by alternate bendings
US3565160A (en) * 1966-11-10 1971-02-23 Curt Herrmann Arc type continuous casting plant
DE1752052A1 (de) * 1968-03-27 1971-05-13 Rasselstein Ag Vorrichtung zur Vermeidung von Bandunebenheiten beim Kaltwalzen von Baendern
US4587822A (en) * 1984-08-10 1986-05-13 The Monarch Machine Tool Company Tension leveling apparatus
US4782683A (en) * 1986-03-03 1988-11-08 Tippins Incorporated Hot strip mill shape processor and method
DE3635088A1 (de) * 1986-10-15 1988-04-28 Bwg Bergwerk Walzwerk Verfahren und walzstrasse zum herstellen von metallband in einem walzprozess
US5687595A (en) * 1995-06-03 1997-11-18 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Method of and apparatus for correcting curvature of rolled metal strip
US6439022B1 (en) * 1999-11-26 2002-08-27 Honda Giken Kogyo Kabushiki Kaisha Rolling apparatus
US20090321491A1 (en) * 2008-06-06 2009-12-31 Wick William R W Edge Detection System
US20100198552A1 (en) * 2008-06-06 2010-08-05 American Industrial Metrology, Inc. Camber Tracking System
EP2329909A4 (en) * 2008-07-11 2017-03-08 Primetals Technologies Japan, Ltd. Method and apparatus for bonding metal plates
CN106670242A (zh) * 2017-02-09 2017-05-17 广西南南铝加工有限公司 在线控制离线带材板形的装置
CN106670242B (zh) * 2017-02-09 2018-05-04 广西南南铝加工有限公司 在线控制离线带材板形的装置

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Publication number Publication date
DE1527677A1 (de) 1970-02-26
FR1463662A (fr) 1966-06-03
BE675899A (ja) 1966-06-16
GB1129771A (en) 1968-10-09
SE302441B (ja) 1968-07-22

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