EP0584642A1 - Walzwerk - Google Patents

Walzwerk Download PDF

Info

Publication number
EP0584642A1
EP0584642A1 EP93112820A EP93112820A EP0584642A1 EP 0584642 A1 EP0584642 A1 EP 0584642A1 EP 93112820 A EP93112820 A EP 93112820A EP 93112820 A EP93112820 A EP 93112820A EP 0584642 A1 EP0584642 A1 EP 0584642A1
Authority
EP
European Patent Office
Prior art keywords
backing
roll
rolls
axis
quarter
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
EP93112820A
Other languages
English (en)
French (fr)
Other versions
EP0584642B1 (de
Inventor
Yutaka C/O Hiroshima Machinery Works Matsuda
Kazuhiko C/O Hiroshima Machinery Works Horie
Tadashi C/O Hiroshima Machinery Works Hiura
Shoichi c/o Hiroshima Machinery Works Hashimoto
Kanji C/O Hiroshima Machinery Works Hayashi
Tetsuo c/o Hiroshima Res. Dev. Center Kajihara
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy 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
Priority claimed from JP4235146A external-priority patent/JP2971261B2/ja
Priority claimed from JP4235147A external-priority patent/JP2984477B2/ja
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0584642A1 publication Critical patent/EP0584642A1/de
Application granted granted Critical
Publication of EP0584642B1 publication Critical patent/EP0584642B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • B21B29/00—Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls ; Roll bending devices, e.g. hydraulic actuators acting on roll shaft ends

Definitions

  • the present invention relates to a split type backing-up roll in a rolling mill which can change a roll crown.
  • edge elongation and distortion would occur. In the event that edge elongation has occurred, it is dealt with by carrying out change and adjustment of a roll crown.
  • a sleeve-system slit type backing-up roll used as an upper or lower backing-up roll of a four-stage rolling mill as shown in Fig. 16, has been known.
  • a center eccentric shaft portion 51a On a roll shaft 51 are formed a center eccentric shaft portion 51a, a pair of left and right quarter eccentric shaft portions 51b and a pair of left and right side eccentric shaft portions 51c, respectively, having different eccentric directions and different diameters
  • roll bearings 52a - 52c are respectively fitted around these eccentric shaft portions 51a - 51c
  • the outer rings of these respective roll bearings 52a - 52c form a freely rotatable center backing-up roll 53a, a pair of left and right quarter backing-up rolls 53b and a pair of left and right side backing-up rolls 53c.
  • Around these axially splitted backing-up rolls 53a - 53c is loosely fitted a cylindrical sleeve 55.
  • an upper split type backing-up roll 59 is constructed.
  • Fig. 17 is a schematic view showing an eccentric condition of the upper split type backing-up roll 59, in which axes Oa, Ob and Oc of the respective backing-up rolls 53a, 53b and 53c deviate from an axis O of the roll shaft 51, and the side backing-up roll 53c is smaller in diameter than the center backing-up roll 53a and the quarter backing-up rolls 53b.
  • a roll crown corresponding to a sheet configuration of the strip S is formed.
  • Fig. 18 is shown variation of a crown pattern at the depressing position.
  • Fig. 20 is a front view showing a general concept of a rolling mill making use of a heretofore known sleeve-system split type backing-up roll on which a thermal crown was created
  • Fig. 21 is a schematic view showing an eccentric state and a depressing state of the same split type backing-up roll
  • Fig. 22 is a diagram showing a crown pattern at a depressing position of the backing-up roll shown in Fig. 21.
  • Fig. 20 shows a rolling mill, in which working rolls 50 and 60 are pressed via backing-up roll chocks 75 and sleeve-system split type backing-up rolls 80 consisting of anti-friction bearings 73a, 73b and 73c rotatably mounted to a roll shaft 71 rotatable by desired angles and having their respective axes Oa, Ob and Oc displaced from an axis O of the roll shaft 71 as shown in Fig. 21, and a cylindrical sleeve 55 loosely fitted around the split type backing-up roll to form an outer shaft of the anti-friction bearings 73a, 73b and 73c.
  • crown pattern of the shape shown in Fig. 22 is effective for a particular sheet width, that is, for particular positions of quarter elongations, if the sheet width is changed and the positions of quarter elongations are displaced from the splitted roll position 73b, the crown pattern becomes ineffective.
  • Another object of the present invention is to provide a rolling mill including a novel split type backing-up roll, which makes it possible to easily perform sheet configuration control of a strip, and which can improve quality of products.
  • Still another object of the present invention is to provide a novel method of rolling sheet materials, which can fully prevent creation of a thermal crown.
  • a rolling mill including work rolls and a split type backing-up roll constructed by rotatably fitting around a roll shaft a center backing-up roll, a pair of quarter backing-up rolls and a pair of side backing-up rolls splitted in the direction of the roll shaft, and loosely fitting a cylindrical sleeve around the outer circumferential surfaces of these respective backing-up rolls, improved in that an axis of either one of the above-mentioned center backing-up roll and the above-mentioned quarter backing-up roll and an axis of the aforementioned side backing-up rolls are positioned as displaced from an axis of the above-mentioned roll shaft in the opposite directions to each other, and that an axis of the other one of the aforementioned center backing-up roll and the above-mentioned quarter backing-up rolls is positioned as displaced from the axis of the above-mentioned roll shaft in the direction crossing at a desired angle with a straight line connecting the
  • the above-described respective backing-up rolls can be formed in various modes of embodiments such that they are formed, for instance, to have the same outer diameters, or the outer diameters of the above-mentioned either one backing-up roll and the aforementioned side backing-up roll are made smaller than the outer diameter of the above-mentioned the other backing-up roll.
  • a rolling mill including work rolls and a split type backing-up roll constructed by rotatably fitting around a roll shaft a center backing-up roll, a pair of quarter backing-up rolls and a pair of side backing-up rolls splitted in the direction of the roll shaft and loosely fitting a cylindrical sleeve around the outer circumferential surfaces of these respective backing-up rolls, improved in that axes of the above-mentioned both quarter backing-up rolls are positioned at the same place as an axis of the aforementioned roll shaft, an axis of the above-mentioned center backing-up roll is positioned as displaced from the axes of the above-mentioned roll shaft and the above-mentioned quarter backing-up rolls, and axes of the above-mentioned both side backing-up rolls are positioned as displaced from the axis of the aforementioned roll shaft in the direction crossing at a desired angle with a straight line connecting the axes of the
  • the above-mentioned center backing-up roll and the above-mentioned both quarter backing-up rolls could be formed to have an identical outer diameter and the outer diameters of the above-mentioned both side backing-up rolls could be made smaller than the outer diameters of the aforementioned center backing-up roll and the aforementioned quarter backing-up rolls.
  • the roll shaft is rotated by an appropriate angle while observing the rolled sheet shape, and thereby the crown pattern is smoothly changed to an optimum crown pattern for control of the sheet configuration.
  • the term “desired angle” means that the crossing angle could be arbitrarily chosen in the range of 20° - 160°.
  • the above-featured rolling mill further improved in that bending cylinders are provided in respective roll chocks of the above-mentioned backing-up rolls, and decrease bending is given to the work rolls by pushing the roll chocks of the above-mentioned work rolls by means of the same bending cylinders.
  • a method of rolling sheet materials consisting of the steps of supporting work rolls by means of a split eccentric roll type backing-up roll splitted into three or more along the direction of a roll shaft, forming a crown pattern of the backing-up roll in a dish-shape or in a V-shape to depress one or both of the upper and lower work rolls, thereby giving a dish-shaped or V-shaped roll crown pattern to the above-mentioned work rolls, and giving decrease bending to the work rolls by pressing a work roll chocks by means of the respective bending cylinders provided in the backing-up roll chocks.
  • a thermal crown has been created on a work roll by heat-generation and temperature-rise due to rolling of the sheet materials
  • a dish-shaped crown pattern is given to a work roll by forming the crown pattern of the split eccentric roll type backing-up roll supporting the work roll in a dish shape
  • a work roll profile is made to be a flat shape having swelled portions at its opposite ends by applying decrease bending to this work roll by means of the bending cylinders.
  • a V-shaped crown pattern is given to the work roll by forming the crown pattern of the split eccentric roll type backing-up roll supporting the work roll in a V-shape, and further, the work roll profile is mate to be a wave shape by applying decrease bending to this work rolls by means of the bending cylinders.
  • a roll shaft 1 in a roll shaft 1 are formed a center eccentric shaft portion 1a, a pair of left and right quarter eccentric shaft portions 1b and a pair of left and right side eccentric shaft portions 1c, around these eccentric shaft portions 1a - 1c are respectively fitted anti-friction bearings 2a - 2c, and the outer rings of these respective anti-friction bearings 2a - 2c form a center backing-up roll 3a, a pair of left and right quarter backing-up rolls 3b and a pair of left and right side backing-up rolls 3c, which can rotate freely.
  • Outer diameters of these axially splitted backing-up rolls 3a - 3c are same, and a cylindrical sleeve 55 is loosely fitted around their outer circumferential surfaces.
  • An upper split type backing-up roll 10 is constructed of the above-described members.
  • a center backing-up roll axis Oa and both side backfing-up roll axes Oc are arranged as displaced from a roll shaft axis O in the opposite direction to each other, and both quarter backing-up roll axes Ob are arranged as displaced from the roll shaft axis O in the direction at about 90° with respect to a straight line connecting the center backing-up roll axis Oa and the side backing-up roll axes Oc as viewed in the cross-section.
  • an upper work roll 50 is supported by this upper split type backing-up roll 10 by depressing bearing boxes 56, and while a sheet configuration in the widthwise direction of the strip S is observed by means of a sheet configuration detector not shown provided on the outlet side of the rolling mill, the roll shaft 1 is rotated by an appropriate angle via a worm 58 and a worm wheel 57, and thereby an optimum crown pattern corresponding to this sheet configuration can be formed.
  • This crown pattern changes depending upon a rotated angle of the roll shaft 1 as shown in Fig. 3, and many kinds of crown patterns can be formed.
  • eccentric bushes could be interposed between the respective anti-friction bearings 2a - 2c and the roll shaft 1.
  • the respective backing-up rolls splitted in the direction of the roll shaft are made to have same diameters, the center backing-up roll and the side backing-up rolls are made eccentric in the opposite directions to each other with respect to the axis of the roll shaft, the quarter backing-up rolls are made eccentric from the axis of the roll shaft in the direction crossing at a desired angle with the first-mentioned eccentric direction, and thereby it becomes possible to form many kinds of crown patterns. Accordingly, a sheet configuration of a strip can be easily controlled. It is to be noted that as the above-described "desired angle", it could be chosen within the range of 20° - 160°.
  • a center eccentric shaft portion 21a As shown in Fig. 4, on a roll shaft 21 are formed a center eccentric shaft portion 21a, a pair of left and right quarter eccentric shaft portions 21b and a pair of left and right side eccentric shaft portions 21c, respectively, having different eccentric directions and different diameters, anti-friction bearings 22a - 22c are respectively fitted around these eccentric shaft portions 21a - 21c, and the other rings of these respective anti-friction bearings 22a - 22c respectively form a center backing-up roll 23a, quarter backing-up rolls 23b and side backing-up rolls 23c, which can rotate freely.
  • the outer diameters of the quarter backing-up rolls 23b and the outer diameters of the side backing-up rolls 23c are made equal, but made smaller than the outer diameter of the center backing-up roll 23a.
  • An upper split type backing-up roll 30 is constructed of the above-mentioned members.
  • quarter backing-up roll axes Ob and side backing-up roll axes Oc are displaced from a roll shaft axis O in the opposite directions to each other, and further, a center backing-up roll axis Oa is arranged as displaced from the roll shaft axis O in the direction nearly at 90° with respect to a straight line connecting the quarter backing-up roll axes Ob and the side backing-up roll axes Oc.
  • an upper work roll 50 is supported by this upper split type backing-up roll by depressing bearing boxes 56, and while a sheet configuration of the strip S is observed by means of a sheet configuration detector not shown provided on the outlet side of the rolling mill, by rotating the roll shaft 21 by an appropriate angle via a worm 58 and a worm wheel 57, an optimum crown pattern corresponding to the sheet configuration is formed.
  • This crown pattern changes smoothly and largely from a flat shape at depressing position I, successively, to the crown patterns at depressing positions III, V, VII and VIII.
  • the above-described split type backing-up roll in the rolling mill according to the second preferred embodiment of the present invention can change its crown pattern smoothly and largely from a flat shape at depressing position I, successively, to the crown patterns at depressing positions III, V, VII and VIII in Fig. 3, owing to the fact that the quarter backing-up rolls and the side backing-up rolls a made to have a smaller diameter than the center backing-up roll, the axes of the quarter and side backing-up rolls are displaced from the axis of the roll shaft in the opposite directions to each other, and the axis of the center backing-up roll is displaced from the axis of the roll shaft in the direction crossing at a desired angle with the eccentric direction of the first-mentioned backing-up rolls.
  • control for a sheet configuration of a strip becomes easy, and its quality can be improved.
  • Outer diameters of a center backing-up roll 33a and quarter backing-up rolls 33b consisting of outer rings of anti-friction bearings 32a and 32b, respectively, fitted around a roll shaft 41 are equal to each other, and outer diameters of side backing-up rolls 33c also consisting of outer rings of anti-friction bearings 32c are smaller than the outer diameters of the center backing-up roll 33a and the quarter backing-up rolls 33b.
  • both quarter backing-up roll axes Ob are identical to a roll shaft axis O, and a center backing-up roll axis Oa and side backing-up roll axes Oc are arranged as displaced from the roll shaft axis O in different directions at about 90° to each other.
  • an optimum crown pattern corresponding to the sheet configuration can be formed.
  • This crown pattern changes depending upon a rotated angle of the roll shaft 41 in the manner shown in Fig. 9, and the changes from a flat pattern to other various patterns are smooth.
  • the split type backing-up roll in the rolling mill according to the above-described third preferred embodiment of the present invention, owing to the fact that the side backing-up roll is made to have a smaller diameter than the center backing-up roll and the quarter backing-up rolls, the quarter backing-up rolls are made concentric with the roll shaft, and the center backing-up roll and the side backing-up rolls have their axes displaced from the axis of the roll shaft in the directions at a desired angle to each other, it becomes possible to smoothly change its crown pattern from a flat pattern to other various patterns.
  • reference numeral 41 designates a roll shaft of a sleeve-system split type backing-up roll 46, which consists of a center eccentric portion 41a, quarter eccentric portions 41b and side eccentric portions 41c whose respective axes Oa, Ob and Oc are displaced from the axis O of this roll shaft 41, and the opposite ends of the roll shaft 41 are supported by backing-up roll chocks 44.
  • a sleeve-system split type backing-up roll 46 is constructed of the above-mentioned members.
  • Reference numerals 50 and 60 designate work rolls on which thermal crown were created by heat-generation and temperature-rise due to rolling
  • numeral 47 designates work roll chocks for supporting these work rolls 50 and 60
  • symbol S designates a sheet material to be rolled, and in the case of this preferred embodiment, the sheet material S is illustrated as a broad-width material.
  • a sleeve-system split type backing-up roll 46 constructed in a similar manner to the above-described fourth preferred embodiment is used as an upper backing-up roll, and by way of example, a sheet material S to be rolled is illustrated as a narrow-width sheet material.
  • a normal backing-up roll is used.
  • the roll shaft 41 is rotated by 90° in the anticlockwise direction starting from the position 0°, thereby the crown pattern of the splitted eccentric roll type backing-up roll 46 supporting the work roll 50 is formed in the V-shape as shown in Fig. 15, and the upper work roll 50 is depressed by the above-mentioned backing-up roll 46 to give a V-shaped crown pattern to this upper work roll 50.
  • the rolling method according to the present invention should not be limited to only the above-described embodiments, but for instance, it can be applied to a multi-stage cluster rolling mill.
  • the crown pattern of the splitted eccentric roll type backing-up roll is formed in a dish-shape or in a V-shape, thereby a similar crown pattern is given to the work roll, and further, by giving decrease bending to the work roll, quarter elongation of the sheet material is prevented, and flatness can be improved.
  • the central two sections are used as center backing-up rolls.
  • the central one section is used as a center backing-up roll and the respective two sections (four sections in total) on the both sides thereof are used as quarter backing-up rolls. Accordingly, the crown patterns in this case are nearly similar to those of the above-described respective embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
EP19930112820 1992-08-12 1993-08-10 Walzwerk Expired - Lifetime EP0584642B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP235146/92 1992-08-12
JP4235146A JP2971261B2 (ja) 1992-08-12 1992-08-12 板材の圧延方法
JP235147/92 1992-08-12
JP4235147A JP2984477B2 (ja) 1992-08-12 1992-08-12 圧延機の分割型補強ロール

Publications (2)

Publication Number Publication Date
EP0584642A1 true EP0584642A1 (de) 1994-03-02
EP0584642B1 EP0584642B1 (de) 1997-03-12

Family

ID=26531976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930112820 Expired - Lifetime EP0584642B1 (de) 1992-08-12 1993-08-10 Walzwerk

Country Status (3)

Country Link
EP (1) EP0584642B1 (de)
BR (1) BR9303359A (de)
DE (1) DE69308681T2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047695A1 (en) * 1997-04-24 1998-10-29 Herbert Lemper Dynamic crown control back-up roll assembly
EP0896841A2 (de) * 1997-08-11 1999-02-17 MANNESMANN Aktiengesellschaft Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen
DE19807601C1 (de) * 1998-02-17 1999-08-12 Mannesmann Ag Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen
CN103769422A (zh) * 2012-10-18 2014-05-07 宝山钢铁股份有限公司 Vc辊平整机组板形参数设定方法
CN108435797A (zh) * 2018-03-19 2018-08-24 包头钢铁（集团）有限责任公司 轧辊表面曲线的确定方法和轧辊
CN112317538A (zh) * 2020-09-21 2021-02-05 山西太钢不锈钢股份有限公司 二十辊可逆冷轧机不锈钢轧制控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284711A (ja) * 1989-04-25 1990-11-22 Mitsubishi Heavy Ind Ltd 圧延機の分割型ロール
JPH03138006A (ja) * 1989-10-25 1991-06-12 Mitsubishi Heavy Ind Ltd 分割バックアップロールを用いた圧延機
JPH03207512A (ja) * 1990-01-08 1991-09-10 Mitsubishi Heavy Ind Ltd 圧延機の分割型補強ロール

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284711A (ja) * 1989-04-25 1990-11-22 Mitsubishi Heavy Ind Ltd 圧延機の分割型ロール
JPH03138006A (ja) * 1989-10-25 1991-06-12 Mitsubishi Heavy Ind Ltd 分割バックアップロールを用いた圧延機
JPH03207512A (ja) * 1990-01-08 1991-09-10 Mitsubishi Heavy Ind Ltd 圧延機の分割型補強ロール

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 354 (M - 1155) 6 September 1991 (1991-09-06) *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 481 (M - 1187) 6 December 1991 (1991-12-06) *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 49 (M - 1078) 6 February 1991 (1991-02-06) *
TOSHIHIRO OTO ET AL.:: "Effect of backup roll length and roll neck length on profile for 4-h mills", IRON AND STEEL ENGINEER, vol. 58, no. 3, March 1981 (1981-03-01), PITTSBURGH US, pages 60 - 65, XP001382134 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047695A1 (en) * 1997-04-24 1998-10-29 Herbert Lemper Dynamic crown control back-up roll assembly
US5943895A (en) * 1997-04-24 1999-08-31 Sms Schloemann-Siemag Aktiengesellschaft Dynamic crown control back-up roll assembly
CN1089060C (zh) * 1997-04-24 2002-08-14 赫伯特·伦珀 凸度控制支承辊组件及轧机机架和轧制中控制凸度的方法
EP0896841A2 (de) * 1997-08-11 1999-02-17 MANNESMANN Aktiengesellschaft Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen
EP0896841A3 (de) * 1997-08-11 1999-08-18 MANNESMANN Aktiengesellschaft Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen
DE19807601C1 (de) * 1998-02-17 1999-08-12 Mannesmann Ag Walzwerk mit Arbeitswalzen und mehrteiligen Stützwalzen
WO1999041025A1 (de) * 1998-02-17 1999-08-19 Sms Demag Ag Walzwerk mit arbeitswalzen und mehrteiligen stützwalzen
CN103769422A (zh) * 2012-10-18 2014-05-07 宝山钢铁股份有限公司 Vc辊平整机组板形参数设定方法
CN103769422B (zh) * 2012-10-18 2016-06-29 宝山钢铁股份有限公司 Vc辊平整机组板形参数设定方法
CN108435797A (zh) * 2018-03-19 2018-08-24 包头钢铁（集团）有限责任公司 轧辊表面曲线的确定方法和轧辊
CN112317538A (zh) * 2020-09-21 2021-02-05 山西太钢不锈钢股份有限公司 二十辊可逆冷轧机不锈钢轧制控制方法

Also Published As

Publication number Publication date
DE69308681D1 (de) 1997-04-17
BR9303359A (pt) 1994-03-15
DE69308681T2 (de) 1997-08-07
EP0584642B1 (de) 1997-03-12

Similar Documents

Publication Publication Date Title
EP0584642A1 (de) Walzwerk
EP0401685B2 (de) Vielwalzengerüst
US4299109A (en) Rolling mill with loosely sleeved roll
JPS6117310A (ja) 形鋼の圧延機
JPH0688053B2 (ja) 圧延方法
JPS5823161B2 (ja) 板材の圧延方法
GB2279595A (en) Continuous casting using rollers having varying radii across their width
EP0647486B1 (de) Walzwerk
JPS58157504A (ja) ロ−ルクロス圧延方法
KR970008030B1 (ko) 압연기 및 판재의 압연방법
JP2984504B2 (ja) 圧延機の分割型補強ロール
JP2587511B2 (ja) 圧延機の分割型補強ロール
GB1582422A (en) Rolling mill
JP2971261B2 (ja) 板材の圧延方法
JP2977379B2 (ja) 圧延機の分割型補強ロール
KR960016455B1 (ko) 압연기
JPS63154204A (ja) Ｈ形及び類似形材のエツジング圧延装置
JP2984477B2 (ja) 圧延機の分割型補強ロール
JP2587504B2 (ja) 圧延機の分割型ロール
JPH03138006A (ja) 分割バックアップロールを用いた圧延機
JP3484334B2 (ja) 冷間輪体圧延方法
JP2963261B2 (ja) 圧延機
SU524579A1 (ru) Валок дл прокатки рифленного листа
de Carvalho Development of materials for back-up rolls
JPS61111708A (ja) 圧延機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930907

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19940819

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 69308681

Country of ref document: DE

Date of ref document: 19970417

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990804

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990810

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990816

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000810

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000810

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050810