EP0019737A1 - Laminoir utilisant un cylindre à convexité variable - Google Patents

Laminoir utilisant un cylindre à convexité variable Download PDF

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Publication number
EP0019737A1
EP0019737A1 EP19800102342 EP80102342A EP0019737A1 EP 0019737 A1 EP0019737 A1 EP 0019737A1 EP 19800102342 EP19800102342 EP 19800102342 EP 80102342 A EP80102342 A EP 80102342A EP 0019737 A1 EP0019737 A1 EP 0019737A1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
rolling mill
rolling
crown
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
EP19800102342
Other languages
German (de)
English (en)
Other versions
EP0019737B1 (fr
Inventor
Tetsuya Mukai
Chihiro Hayashi
Takeshi Masui
Kazuo Kondo
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
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Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Publication of EP0019737A1 publication Critical patent/EP0019737A1/fr
Application granted granted Critical
Publication of EP0019737B1 publication Critical patent/EP0019737B1/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
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • B21B27/03—Sleeved rolls
    • B21B27/05—Sleeved rolls with deflectable sleeves
    • 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
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/34—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by hydraulic expansion of the rolls
    • 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
    • B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending

Definitions

  • the present invention relates to a multi-high rolling mill using at least one variable crown roll.
  • the rolling mill to which the principle of the present invention applies comprises at least a pair of work rolls and a back-up roll arranged in at least three-high (mainly four-high) and in a single stand or tandem stands, for applications of either hot or cold rollings and preferably comprises further roll benders as additional equipment.
  • work roll as used herein and in the claims is to be understood to mean a roll in direct contact with a material to be rolled and the term “back-up roll” is to be understood to mean a roll directly or indirectly supporting the work roll.
  • variable crown roll is so constructed as to be controllable in the extent of crowning of the roll by introducing a fluid or a viscous material under pressure into a predetermined cavity defined between an arbor and a sleeve.
  • variable crown roll has been heretofore used in two-high rolling mills but never in three- or more high rolling mills.
  • United States Patents Nos. 3,604,086 and 3,457,617 disclose variable crown rolls which - were, however, all applied to two-high rolling mills only.
  • the two-high rolling mills using conventional variable crown rolls had several disadvantages such that the work rolls were unable to withstand high rolling load, it was difficult to manufacture roll sleeves of high hardness, the toughness of the sleeve decreased because of the requirement for higher surface hardness of the rolls, and shape defects are easily caused in the strip in the neighborhood of the pressure receiving sleeve end. Accordingly, such rolling mills were, while suitable for light load rolling such, for example, as temper rolling, not suitable for heavy load rolling such as common hot or cold rolling.
  • variable crown roll was not applied to the multi-high rolling mills (particularly to back-up rolls) probably for the following apprehensions:
  • the inventors have sufficient reason to state that the VC roll is satisfactorily applicable to the multi-high rolling mills.
  • an object of the present invention is to apply the VC rolls to the multi-high rolling mill to thereby make extensive and manifold rolling practicable.
  • the basic conception of the present invention is to provide a multi-high (mainly four-high) rolling mill comprising a pair of work rolls and at least one back-up roll, in which at least one of the rolls is a VC roll.
  • an annular cavity 3 is defined between an arbor 1 and a sleeve 2, to which a medium (for example, water, oil, grease or the like) under high pressure is applied from a medium pressurizing unit 4 through a conduit 11 provided in the arbor 1 so as to control the extent of crowning of the roll (that is, the extent of the diametrical expansion of the roll outer diameter) by regulating the pressure of the medium by means of the unit 4.
  • a medium for example, water, oil, grease or the like
  • the rolling mills to which the present invention is intended are of the types, for example, as shown in Figs. 2 to 4.
  • the rolling mills are, in principle, multi-high rolls mainly from three-high to six- high rolls as shown in Figs. 2A to 2F and most'suitably four-high rolls as shown in Fig. 2C. Accordingly, the present invention will be described hereinunder as being applied to the four-high rolling mill for the sake of simplicity but it must be understood that application of the present invention is not limited thereto.
  • the rolling mill may be either of single stand as shown in Fig. 3A or of tandem stands-as shown in Fig. 3B.
  • the rolling mill is preferably provided with roll bender J W or J B in the work roll W or back-up roll B thereof.
  • the basic construction of the rolling mill according to the present invention resides in, as shown with reference to the three-high mill for convenience' sake in Figs. 5A to 5G, the multi-high rolling mill in which at least one of the rolls is the VC roll (hatched in the drawing). Accordingly, the three-high rolling mill according to the present invention may take any of the roll combinations shown in Figs. 5A to 5G. Special effects achieved by this construction will become clear from the ensuing description.
  • the four-high rolling mill has, as shown in Figs. 6A to 6C, at least one VC roll (hatched in the drawing) in the back-up rolls.
  • the extent of crowning of the back-up rolls is first changed.
  • the change then exerts an influence on the work rolls to bend the entire shafts of the work rolls to thereby cause a substantially predetermined extent of change in the crown of the work rolls.
  • Sheet crown thickness distribution across the strip width
  • shape tests were performed in the four-high rolling mill for test in which, as shown in Fig. 6A, the upper back-up roll is a VC roll of the size 200 mm in outer diameter and 460 mm in length while the work roll is of the size 80 mm in outer diameter and 460 mm in length.
  • Fig. 12 shows the results of the sheet crown tests performed on an aluminum plate of 4 mm in thickness and 350 mm in width under the rolling load of 20 tons using the four-high rolling mill described above.
  • the marks O, 0, A and X denote the oil pressure P' (Kg/cm 2 ) of the VQ roll at 0, 165, 340, and 510, respectively.
  • P' Kg/cm 2
  • Fig. 13 shows the results of the shape tests performed on a cold rolled coil of 0.4 mm in thickness and 300 mm in width under fixed drafts using the same four-high rolling mill described above.
  • the marks 0, ⁇ , and ⁇ indicates the reduction (96) of 0.5, 1.0, and 14.5, respectively.
  • the shape of the rolled material changes from wavy edges to center buckle and, under the predetermined reduction good flatness is obtained at a specified oil pressure.
  • bender it becomes possible to correct quarter buckle shape defect.
  • the shape control effect according to the present invention was confirmed.
  • the four-high rolling mill has, as shown in Figs. 7A to . 7C, at least one VC roll (hatched in the drawing) in the work rolls.
  • Fig. 14 shows the results of the sheet crown tests performed on an aluminum plate of 4 mm in thickness and 250 mm in width under the rolling load of 20 tons using the four-high rolling mill described above.
  • the marks 0, ⁇ , and X denote the oil pressure P' (Kg/cm 2 ) of the VC roll at 0, 200, and 400, respectively.
  • the curves of Fig. 14 show the similar tendency to those of Fig. 12.
  • Fig. 15 shows the results of the shape tests performed on a cold rolled coil of 0.4 mm in thickness and 300 mm in width under the reduction of 1% using the same four-high rolling mill with the oil pressure P' (Kg/cm 2 ) of the VC roll changed.
  • the curves of Fig. 15 show the similar tendency to those of Fig. 13.
  • Figs. 16 and 17 show the results of the sheet crown and the shape tests, respectively, performed in a further embodiment of the present invention in which the VC roll is used in one of each of the back-up and the work rolls as shown in Figs. 8A and 8B.
  • the sizes of the rolls of the mills and the sizes and the quality of the specimens used in the tests of Figs. 16 and 17 are the same as those used in the tests of Fig. 14.
  • VC rolls used in pair are of the same internal construction. As shown in Figs. 9 and 10, however, by intentionally making one of the VC rolls in pair different from the other in the variable crown construction (primarily the size of the cavity which is filled by the pressure medium), it is made possible to roll efficiently materials ranging in width radically without changing the rolls. That is, a material of large width is rolled by rolls of large width variable crown construction, a material of small width is rolled by rolls of small width variable crown construction, and a material of intermediate width is rolled by rolls of large width alone or in combination with the rolls of small width variable crown rolls.
  • the sheet crown and shape control system can be constructed by combining the VC rolls with a detector.
  • a rolling mill 21 is provided on the exit/entry side thereof with a sheet crown and shape detector 22, a detection signal of which is transmitted to a control unit 23 in which the detection signal is compared with the set value, to control the medium pressurizing unit 4 (see Fig. 1) of the VC roll provided in the rolling mill 21.
  • the detector is preferably of non-contact type.
  • Various instruments such as an X-ray thickness meter, a ⁇ -ray thickness meter, a flying micrometer and the like can be used as the sheet crown detector.
  • There are various types of the shape detector such as optical type, electromagnetic type, displacement-type, vibration-type, and the like.
  • the sheet crown control is performed within the range of the shape defect that is not disadvantageous to the rolling operation and the shape control is performed at the final pass.
  • the sheet crown is performed at the upstream stand and the shape-attended control is performed at the final stand.
  • the rolling mill used in the experiments is, as shown in Fig. 18, a four-high mill in which the upper back-up roll B is a VC roll and a roll bender is provided between the work rolls W.
  • Table 1 shows the sizes of this rolling mill and the rolling conditions.
  • Figs. 19 to 21 show the results of tests performed on the relation between the work roll bending force J W (ton) and the bar crown when the oil pressure P' (Kg/cm 2 ) applied to the VC roll in this rolling mill is varied stepwise.
  • Fig. 19 shows the results of the cold temper rolling of a material of 1200 mm in width under the rolling load of 500 tons.
  • the horizontal axis indicates the bending force J w (ton) of the work rolls and the vertical axis indicates the bar crown ⁇ c (cm) at the position of 1/4 of width.
  • A denotes the conventional bending effect (19.2 ⁇ )
  • B denotes the effects of change in oil pressure of the VC roll only (31.3 ⁇ )
  • C denotes the multiplication effect (51.6p) by the VC roll and the bender.
  • Fig. 20 shows the results of the cold tandem rolling of a material of 1000 mm in width under the rolling load of 900 tons.
  • Fig. 21 shows the results of the hot tandem rolling of a material of 1000 mm in width under the rolling load of 900 tons.
  • Table 3 shows the examples of application of the VC roll to a continuous finishing mill
  • application of it.to a roughing mill is likewise effective.
  • its application to a roughing mill of a semi-continuous hot strip mill is effective not only in crown control but also in improvement in the crop loss at the top or bottom of the strip.
  • the combination of the VC roll with the conventional roll bender provides an enlarged range of control.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)
EP19800102342 1979-05-24 1980-04-30 Laminoir utilisant un cylindre à convexité variable Expired EP0019737B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP64459/79 1979-05-24
JP6445979A JPS5926365B2 (ja) 1979-05-24 1979-05-24 可変クラウン・ロ−ルを用いた圧延機

Publications (2)

Publication Number Publication Date
EP0019737A1 true EP0019737A1 (fr) 1980-12-10
EP0019737B1 EP0019737B1 (fr) 1983-06-08

Family

ID=13258834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800102342 Expired EP0019737B1 (fr) 1979-05-24 1980-04-30 Laminoir utilisant un cylindre à convexité variable

Country Status (5)

Country Link
EP (1) EP0019737B1 (fr)
JP (1) JPS5926365B2 (fr)
AU (1) AU537257B2 (fr)
CA (1) CA1147990A (fr)
DE (1) DE3063658D1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488161A1 (fr) * 1980-08-08 1982-02-12 Sumitomo Metal Ind Laminoir en tandem
EP0050319A2 (fr) * 1980-10-20 1982-04-28 Sumitomo Metal Industries, Ltd. Dispositif de réglage du générateur de très haute pression dans un circuit
FR2555076A1 (fr) * 1983-11-22 1985-05-24 Bwg Bergwerk Walzwerk Cylindre pour des laminoirs a froid et a chaud
AU575139B2 (en) * 1984-03-29 1988-07-21 Sumitomo Metal Industries Ltd. Method and apparatus for controlling strip shape in a rolling mill
WO1990000450A1 (fr) * 1988-07-11 1990-01-25 DAVID McKEE (POOLE) LIMITED Laminage de materiau en bande
DE102010029598A1 (de) 2010-06-01 2011-12-01 ACHENBACH BUSCHHüTTEN GMBH Stützwalze und damit ausgerüstetes Walzgerüst
US8277645B2 (en) 2008-12-17 2012-10-02 Jarvis Jr Ernest Automatic retractable screen system for storm drain inlets
CN113393753A (zh) * 2021-05-24 2021-09-14 攀钢集团攀枝花钢钒有限公司 钢轨半万能轧制金属流动平面演示控制方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816720A (ja) * 1981-07-20 1983-01-31 Sumitomo Metal Ind Ltd 圧延材の板クラウンと板形状の制御方法
JPS5832509A (ja) * 1981-08-18 1983-02-25 Sumitomo Metal Ind Ltd 圧延材の板クラウンと板形状の制御方法
AT373795B (de) * 1981-11-11 1984-02-27 Escher Wyss Ag Walzvorrichtung
JPS5935806A (ja) * 1982-08-24 1984-02-27 Sumitomo Metal Ind Ltd 圧延方法
JPS5954401A (ja) * 1982-12-17 1984-03-29 Ishikawajima Harima Heavy Ind Co Ltd 圧延方法
DE3819303A1 (de) * 1988-06-03 1989-12-07 Mannesmann Ag Flachwalzwerk
CN116159869B (zh) * 2023-01-04 2023-08-25 北京科技大学 具有局部边浪控制能力的变凸度工作辊辊形及设计方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1507837A (fr) * 1966-01-19 1967-12-29 Bwg Bergwerk Walzwerk Cylindre de travail à convexité variable
DE1452009A1 (de) * 1963-07-10 1968-12-05 Accuroll S A Verfahren und Anordnung zur Verminderung des Durchbiegens verhaeltnismaessig starrer belasteter Konstruktionen
DE1602155A1 (de) * 1967-09-29 1970-04-09 Siemag Siegener Maschb Gmbh Verfahren zum Ausgleich der Durchbiegung des Walzenballens von Walzwerkswalzen sowie Walzwerkswalze zur Ausuebung des Verfahrens
DE1602200A1 (de) * 1967-06-13 1972-02-03 Wissenschaftlich Tech Zentrum Verfahren zur Regelung des Walzballenprofils der Arbeitswalzen waehrend des Walzvorganges beim Walzen von Metallband und anderen Werkstoffen
DE2507233A1 (de) * 1975-02-13 1976-08-26 Escher Wyss Ag Walzwerk
DE2651028A1 (de) * 1976-11-02 1978-05-11 Escher Wyss Ag Walzgeruest

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1452009A1 (de) * 1963-07-10 1968-12-05 Accuroll S A Verfahren und Anordnung zur Verminderung des Durchbiegens verhaeltnismaessig starrer belasteter Konstruktionen
FR1507837A (fr) * 1966-01-19 1967-12-29 Bwg Bergwerk Walzwerk Cylindre de travail à convexité variable
US3457617A (en) * 1966-01-19 1969-07-29 Bwg Bergwetk Und Walzwerk Masc Working roll for a roller mill
DE1602200A1 (de) * 1967-06-13 1972-02-03 Wissenschaftlich Tech Zentrum Verfahren zur Regelung des Walzballenprofils der Arbeitswalzen waehrend des Walzvorganges beim Walzen von Metallband und anderen Werkstoffen
DE1602155A1 (de) * 1967-09-29 1970-04-09 Siemag Siegener Maschb Gmbh Verfahren zum Ausgleich der Durchbiegung des Walzenballens von Walzwerkswalzen sowie Walzwerkswalze zur Ausuebung des Verfahrens
US3604086A (en) * 1967-09-29 1971-09-14 Siegener Maschinenbau Gmbh Method and apparatus for compensating for the deflection of steel plate rolling mill rolls
DE2507233A1 (de) * 1975-02-13 1976-08-26 Escher Wyss Ag Walzwerk
DE2651028A1 (de) * 1976-11-02 1978-05-11 Escher Wyss Ag Walzgeruest

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2488161A1 (fr) * 1980-08-08 1982-02-12 Sumitomo Metal Ind Laminoir en tandem
EP0050319A2 (fr) * 1980-10-20 1982-04-28 Sumitomo Metal Industries, Ltd. Dispositif de réglage du générateur de très haute pression dans un circuit
EP0050319A3 (en) * 1980-10-20 1983-01-19 Sumitomo Metal Industries, Ltd. Control system for superhigh pressure generation circuit
FR2555076A1 (fr) * 1983-11-22 1985-05-24 Bwg Bergwerk Walzwerk Cylindre pour des laminoirs a froid et a chaud
AU575139B2 (en) * 1984-03-29 1988-07-21 Sumitomo Metal Industries Ltd. Method and apparatus for controlling strip shape in a rolling mill
WO1990000450A1 (fr) * 1988-07-11 1990-01-25 DAVID McKEE (POOLE) LIMITED Laminage de materiau en bande
US8277645B2 (en) 2008-12-17 2012-10-02 Jarvis Jr Ernest Automatic retractable screen system for storm drain inlets
DE102010029598A1 (de) 2010-06-01 2011-12-01 ACHENBACH BUSCHHüTTEN GMBH Stützwalze und damit ausgerüstetes Walzgerüst
EP2392416A1 (fr) 2010-06-01 2011-12-07 ACHENBACH BUSCHHÜTTEN GmbH Cylindre d'appui et cage de laminoir en étant équipée
CN113393753A (zh) * 2021-05-24 2021-09-14 攀钢集团攀枝花钢钒有限公司 钢轨半万能轧制金属流动平面演示控制方法
CN113393753B (zh) * 2021-05-24 2022-08-16 攀钢集团攀枝花钢钒有限公司 钢轨半万能轧制金属流动平面演示控制方法

Also Published As

Publication number Publication date
AU5690380A (en) 1980-11-27
EP0019737B1 (fr) 1983-06-08
JPS5926365B2 (ja) 1984-06-27
DE3063658D1 (en) 1983-07-14
JPS55156606A (en) 1980-12-05
AU537257B2 (en) 1984-06-14
CA1147990A (fr) 1983-06-14

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