EP1184094A2 - Walzwerk und Walzverfahren - Google Patents

Walzwerk und Walzverfahren Download PDF

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Publication number
EP1184094A2
EP1184094A2 EP01103675A EP01103675A EP1184094A2 EP 1184094 A2 EP1184094 A2 EP 1184094A2 EP 01103675 A EP01103675 A EP 01103675A EP 01103675 A EP01103675 A EP 01103675A EP 1184094 A2 EP1184094 A2 EP 1184094A2
Authority
EP
European Patent Office
Prior art keywords
roll
rolling
movable frame
rolling mill
chocks
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.)
Withdrawn
Application number
EP01103675A
Other languages
English (en)
French (fr)
Other versions
EP1184094A3 (de
Inventor
Takehisa Harako
Tadashi Hashimoto
Ryohei Kinose
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP1184094A2 publication Critical patent/EP1184094A2/de
Publication of EP1184094A3 publication Critical patent/EP1184094A3/de
Withdrawn legal-status Critical Current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
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/203—Balancing rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B2031/206—Horizontal offset of work rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
    • B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
    • 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
    • B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks

Definitions

  • the present invention relates to rolling mills and rolling methods, and in particular to, a rolling mill configured so that the rolls can be moved in the direction of the axis of the rolls depending on the width of the material to be rolled, and with a hydraulic apparatus for carrying out control of the roll balance or of the shape of the rolled material being incorporated in a movable frame provided separately from the roll chocks installed at each end of the rolls, and so that said movable frame can be moved in the direction of the roll axis along with the rolls and the roll chock.
  • Rolling mills for sheet materials are generally constructed so that the rolls can be moved in the direction of the roll axis in order to adjust the position of the rolls in the axial direction depending on the width of the material to be rolled.
  • the construction is one in which the cylinder part of the of the hydraulic apparatus for carrying out control of roll balance or of the shape of the rolled material is incorporated in a movable frame provided separately from the roll chocks installed at each end of the rolls, and the piston part of the hydraulic apparatus is mated with the flange part of the roll chock, and also the movable frame, the rolls, and the roll chock are moved together in the direction of the roll axis.
  • rolling mills provided with a hydraulic apparatus for carrying out control of roll balance or shape of the rolled material
  • rolling mills such as the one disclosed in Japanese patent application laid open No. Sho 61-129208, in which a hydraulic apparatus is provided for pushing and restricting the roll chock against the housing in the rolling direction in order to make zero the gap between the roll chock and the housing.
  • gaps are useful for their intended purpose at the time of adjusting the position of the roll in the axial direction or at the time of roll replacement, they will have detrimental effect at the time of rolling the material to be rolled, that is, the roll chocks installed at the ends of the rolls will move due to these gaps, and the rolls become inclined relative to the material being rolled, thereby causing meandering movement of the rolled material or failure of biting of the material at the rolling mill.
  • roller bearings having cylindrical rollers are commonly used in the roll chock of the work roll that rolls the material to be rolled. These rollers revolve around the roller axis, and during rolling, vibrate the rolling mill at a frequency of vibration proportional to the number of times the rollers pass per unit time, and if this frequency of vibration unknowingly becomes equal to natural frequencies of the rolling mill, there will be resonance which further gets amplified by said gaps, and may even cause chattering marks on the rolled material.
  • An object of the present invention is, in a rolling mill in which a hydraulic apparatus for carrying out control of the roll balance or of the shape of the rolled material is incorporated in a movable frame provided separately from the roll chocks installed at each end of the rolls, to provided a rolling mill and a rolling method that make it possible to carry out stable rolling with small roll inclination, to reduce roll vibrations, and to manufacture high quality products.
  • the pushing force of the second hydraulic apparatus is weakened when the vibrations are small, and the function of controlling the roll balance or the shape of the rolled material by the first hydraulic apparatus is effectively utilized, and the pushing force of the second hydraulic apparatus is increased only when the vibrations due to resonance become a problem, and the roll chock is restricted in the up/down direction by increasing the friction force between the movable frame and the roll chock, thereby reducing the vibrations due to resonance.
  • Fig. 1 and Fig. 2 the top and bottom work rolls 1 and 2 that roll the material to be rolled are supported at both ends by the work roll chocks 4 and 5 that are held inside the window part of the mill stand (rolling mill housing) 3, and the back-up rolls 6 and 7 in contact with the work rolls 1 and 2 are similarly supported at both ends by the back-up roll chocks 8 and 9 that are held within the mill stand 3.
  • the back-up rolls 6 and 7 and the back-up roll chocks 8 and 9 can move in the up/down direction as in the conventional manner, and are fixed in the direction of the roll axis.
  • the work roll chocks 4 and 5 are formed with a width narrower than the width of the window part of the mill stand 3, and are held and supported by the mill stand 3 via the movable frames 10 and 11 placed almost at the middle of the mill stand in the up/down direction.
  • the movable frames 10 and 11 are respectively placed on both sides of each of the work roll chocks 4 and 5 on the rolling mill driving side (the right side in Fig. 2) and the operation side (the left side in Fig. 2), and also the top and bottom ones have been made independent.
  • the hydraulic apparatus 12 and 13 for carrying out control of the roll balance and the shape of the rolled material are incorporated in the movable frames 10 and 11 corresponding to the work rolls 1 and 2, and these hydraulic apparatus 12 and 13 are constituted of the cylinders 12a and 13a formed inside the movable frames 10 and 11, and the pistons 12b and 13b that mate with the flanges 4a and 5a of the work roll chocks 4 and 5.
  • movable frames 10 and 11 inside the movable frames 10 and 11 are incorporated the hydraulic apparatus 16 and 17 that push and restrict the roll chocks 4 and 5 and the movable frames 10 and 11 in the direction of flow of the rolled material relative to the mill stand 3, and the hydraulic apparatus 18 and 19 (described later) that push and restrict the movable frames 10 and 11 in the up/down direction relative the mill stand 3.
  • the guide frame 20 that support the movable frames 10 and 11 so that they can not move in the up/down direction but can move in the direction of the roll axis.
  • This guide frame 20 is a part separate from the mill stand 3, and can either be fitted mating with the inside surface of the mill stand 3 or can have an integrated construction with the mill stand 3.
  • the guide frame 20 is formed in shape of the letter "E" having projecting parts at the top, bottom, and middle so that the top and bottom movable frames 10 and 11 can be supported and guided, and also so that it is sufficient to support the work rolls 1 and 2 during rolling and said movable frames 10 and 11 when the work roll chocks 4 and 5 are being moved in the roll axis direction, and their inside surfaces are provided with liner 21 where they come into contact with the movable frames 10 and 11.
  • the movable frame 10 and 11 on the operation side of the rolling mill and the work roll chocks 4 and 5 are held fixed by the keeper plates 22 and 23, and also each of the movable frames 10 and 11 on the operation side and driving side are mutually coupled by coupling links 24 and 25, and can be moved in the roll axis direction together with the work rolls 1 and 2 and the work roll chocks 4 and 5.
  • the keeper plates 22 and 23 are fixed to the end surfaces of the movable frames 10 and 11 using bolts via long holes, and the front ends of the keeper plates 22 and 23 enter into the vertical grooves formed in the work roll chocks 4 and 5, and a small gap is formed between keeper plates 22 and 23 and the vertical grooves in the work roll chocks 4 and 5 so that the work roll chocks 4 and 5 can move up/down.
  • the front ends of the keeper plates 22 and 23 are detached from the vertical groove in the work roll chocks 4 and 5, thereby making it possible to move the work roll chocks 4 and 5 relative to the movable frames 10 and 11 in the roll axis direction at the time of replacing the rolls.
  • the end surface of the guide frame 20 on the operation side is provided with stopper 14 linked to said movable frames 10 and 11 so that the movable frames 10 and 11 can be held in the guide frame 20 at the time of roll replacement.
  • the respective coupling parts 26 and 27 shown in Fig. 2 are fitted to the driving side end sections of the work rolls 1 and 2, and the rotation drive is applied here using roll driving units not shown in the figure. Further, the work rolls 1 and 2 together with couplings 26 and 27 are moved in the roll axis direction according to the width of the rolled material by the roll movement equipment not shown in this figure. At the time of such movement in the roll axis direction, the movement in the same axial direction is done together with the movable frames 10 and 11 along with the work rolls 1 and 2 and the work roll chocks 4 and 5, the keeper plates 22 and 23 and the coupling links 24 and 25. Therefore, all the hydraulic apparatus 12, 13, 16, 17, 18, and 19 incorporated in the movable frames 10 and 11, and the work roll chocks 4 and 5 will always be maintained in the same positional relationships.
  • the hydraulic apparatus 16 and 17 that push and restrict the roll chocks 4 and 5 and the movable frames 10 and 11 in the direction of the flow of the rolled material relative to the mill stand 3 consist of the cylinders 16a and 17a formed inside the movable frames 10 and 11, and the pistons 16b and 17b that mate with the guiding frame 20 via liners 21.
  • the hydraulic apparatus 18 and 19 that push and restrict the movable frames 10 and 11 in the up/down direction relative to the mill stand 3 consist of the cylinders 18a and 19a formed inside the movable frames 10 and 11, and the pistons 18b and 19b that mate with the top and bottom projections of the guide frame 20.
  • the hydraulic apparatus 16 and 17 that push and restrict the roll chocks 4 and 5 and the movable frames 10 and 11 in the direction of flow of the rolled material relative to the mill stand 3 are installed on the inlet side of the movable frames 10 and 11 in the direction of flow of the rolled material, thereby pushing the roll chocks 4 and 5 and the movable frames 10 and 11 towards the outlet side of the flow direction of the rolled material.
  • the hydraulic apparatus 18 and 19 for pushing and restricting in the up/down direction relative to the mill stand 3 are installed in the movable frames 10 and 11 on both the inlet side and the outlet side of the flow direction of the rolled material.
  • the work roll chocks 4 and 5 contain roller bearings 28, and the work rolls 1 and 2 are supported by the work roll chocks 4 and 5 via these roller bearings 28. Gaps that are necessary during replacement of work rolls 1 and 2 have been provided between the work roll chocks 4 and 5 and the movable frames 10 and 11, and at least one of each contacting surface (at least one of the side surface on the side of the work roll chocks 4 and 5, and the side surface on the side of the movable frames 10 and 11 that is adjacent to the first surface) has been subjected to surf ace roughening treatment such as ragging, shot-blasting, etc., for preventing slipping in order to increase the friction coefficient.
  • surf ace roughening treatment such as ragging, shot-blasting, etc.
  • liners on at least one of the side surfaces between the work roll chocks 4 and 5 and the movable frames 10 and 11, and in this case, such liners are subjected to surface roughening treated such as raging for preventing slipping.
  • the movements in the axial direction of the work rolls 1 and 2 are done in mutually opposite directions before starting rolling, thereby adjusting the positions of the work rolls 1 and 2 in the axial direction according to the width of the material to be rolled.
  • the hydraulic apparatus 12 and 13 inside the movable frames 10 and 11, and the hydraulic apparatus 16, 17, 18, and 19 are made to operate.
  • the hydraulic apparatus 12 and 13 apply a bending force on the work rolls in a manner similar to the conventional rolling mills, thereby controlling the shape of the rolled material.
  • the hydraulic apparatus 16, 17, 18, and 19 push the roll chocks 4 and 5 and the movable frames 10 and 11 thereby making small the inclination of the roll axis center and the vibrations, and making it possible to obtain stable rolling and products with a high quality.
  • the pushing force of the hydraulic apparatus 18 and 19 during rolling can either be constant, or, preferably, the pushing force of the hydraulic apparatus 16 and 17 can be controlled hydraulically to be variable.
  • the shape control function is achieved because the hydraulic apparatus 12 and 13 apply a bending force in the up/down direction on the roll chocks 4 and 5, the bending force will be affected if the pushing force due to the hydraulic apparatus 16 and 17 is too large.
  • the vibration stopping function will not be effective.
  • the vibrations of the work rolls 1 and 2 are detected by providing a vibration detector, not shown the figures here, in the roll chock section 4 and 5, and reducing the hydraulic pressure operating on the hydraulic apparatus 16 an 17 when the vibrations are smaller than a preset threshold value, and increasing said hydraulic pressure when the vibrations are more than the threshold value thereby increasing the pushing force of the hydraulic apparatus 16 and 17.
  • the work roll chocks are pushed in the direction of flow of the rolled material, the roll inclination gets eliminated, the meandering movements of the rolled material and material biting failures get eliminated, and it becomes possible to carry out stable rolling. Further, since the work roll chocks are restricted in the direction of flow of the rolled material and in the up/down direction, the roll vibrations will be reduced, the surface of the rolled products becomes smooth, and it will be possible to manufacture products with a high quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Winding Of Webs (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP01103675A 2000-08-29 2001-02-23 Walzwerk und Walzverfahren Withdrawn EP1184094A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000258529 2000-08-29
JP2000258529 2000-08-29

Publications (2)

Publication Number Publication Date
EP1184094A2 true EP1184094A2 (de) 2002-03-06
EP1184094A3 EP1184094A3 (de) 2004-12-22

Family

ID=18746831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01103675A Withdrawn EP1184094A3 (de) 2000-08-29 2001-02-23 Walzwerk und Walzverfahren

Country Status (5)

Country Link
US (1) US20020023473A1 (de)
EP (1) EP1184094A3 (de)
KR (1) KR20020017904A (de)
CN (1) CN1340388A (de)
TW (1) TW504411B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2307715C1 (ru) * 2006-01-25 2007-10-10 Валерий Владимирович Бодров Прокатная клеть с гидравлическим нажимным устройством

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10243677A1 (de) * 2002-09-20 2004-04-01 Sms Demag Ag Reibungsarmes Biegesystem in einem Mehrwalzen-Walzgerüst
US7225657B2 (en) * 2004-05-05 2007-06-05 United States Steel Corporation Elimination of rolling mill chatter
DE102006024101A1 (de) * 2006-05-23 2007-11-29 Sms Demag Ag Walzgerüst und Verfahren zum Walzen eines Walzbandes
DE102007001322A1 (de) * 2007-01-03 2008-07-10 Sms Demag Ag Führungsvorrichtung für die Einbaustücke von Arbeitswalzen
CN101602063B (zh) * 2008-06-13 2011-02-09 中色科技股份有限公司 一种可提供正、负弯辊力的组合式液压缸
KR101109488B1 (ko) * 2009-11-30 2012-01-31 현대제철 주식회사 압연장치
DE102010024231B4 (de) * 2010-06-18 2015-02-12 Khd Humboldt Wedag Gmbh Rollenpresse mit Momentenwaage
KR101403232B1 (ko) * 2011-11-17 2014-06-02 주식회사 포스코 롤쵸크 밸런싱 유지장치
CN102688891A (zh) * 2012-05-29 2012-09-26 上海电机学院 静压悬浮轴辊装置
KR101994054B1 (ko) * 2016-11-07 2019-06-27 프리메탈스 테크놀로지스 재팬 가부시키가이샤 압연기 및 압연기의 조정 방법
US11400499B2 (en) * 2018-03-08 2022-08-02 Nippon Steel Corporation Method for setting rolling mill, and rolling mill
CN111250543A (zh) * 2018-11-30 2020-06-09 上海梅山钢铁股份有限公司 一种可逆轧机间隙消除装置
CN111804732A (zh) * 2020-05-29 2020-10-23 合肥市百胜科技发展股份有限公司 三辊精轧轧机
CN112743018B (zh) * 2020-12-16 2024-12-13 辽宁科技大学 一种轧制锻压两用轧机及联合机组
CN116274391B (zh) * 2023-03-07 2025-12-30 中冶京诚工程技术有限公司 窜辊装置及轧机

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
US3302435A (en) * 1963-11-20 1967-02-07 Blaw Knox Co Rolling mill chock clearance take-up devices
JPS5012385B2 (de) * 1971-12-22 1975-05-12
JPS57199505A (en) * 1981-06-03 1982-12-07 Hitachi Ltd Work roll moving type rolling mill
JPS58167010A (ja) * 1982-03-29 1983-10-03 Hitachi Ltd 圧延機
JPS5924505A (ja) * 1982-07-30 1984-02-08 Kawasaki Steel Corp スラブの粗圧延機
JPS61129208A (ja) * 1984-11-28 1986-06-17 Hitachi Ltd 圧延機のロ−ル軸受箱クランプ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2307715C1 (ru) * 2006-01-25 2007-10-10 Валерий Владимирович Бодров Прокатная клеть с гидравлическим нажимным устройством

Also Published As

Publication number Publication date
CN1340388A (zh) 2002-03-20
EP1184094A3 (de) 2004-12-22
TW504411B (en) 2002-10-01
US20020023473A1 (en) 2002-02-28
KR20020017904A (ko) 2002-03-07

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