EP0647486B1 - Laminoir - Google Patents

Laminoir Download PDF

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Publication number
EP0647486B1
EP0647486B1 EP93116369A EP93116369A EP0647486B1 EP 0647486 B1 EP0647486 B1 EP 0647486B1 EP 93116369 A EP93116369 A EP 93116369A EP 93116369 A EP93116369 A EP 93116369A EP 0647486 B1 EP0647486 B1 EP 0647486B1
Authority
EP
European Patent Office
Prior art keywords
roll
rolls
rolling mill
crown
sheet
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.)
Revoked
Application number
EP93116369A
Other languages
German (de)
English (en)
Other versions
EP0647486A1 (fr
Inventor
Shoichi C/O Mitsubishi Jukogyo K. K. Hashimoto
Kanji C/O Mitsubishi Jukogyo K. K. Hayashi
Tetsuo C/O Mitsubishi Jukogyo K. K. Kajihara
Kazuo C/O Mitsubishi Jukogyo K. K. Morimoto
Toru Kaneko
Shunji Kamata
Tadashi Koga
Yuji Hoshin-Ryo C-206 Kaga
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
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Priority to BR9304173A priority Critical patent/BR9304173A/pt
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to DE1993616752 priority patent/DE69316752T2/de
Priority to EP93116369A priority patent/EP0647486B1/fr
Publication of EP0647486A1 publication Critical patent/EP0647486A1/fr
Application granted granted Critical
Publication of EP0647486B1 publication Critical patent/EP0647486B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B13/023—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally the axis of the rolls being other than perpendicular to the direction of movement of the product, e.g. cross-rolling

Definitions

  • the present invention relates to a rolling mill provided with a roll-crossing device as defined in the preamble of claim 1.
  • Fig. 8 shows a general concept of one example of a cross-roll type rolling mill in the prior art, in which upper and lower work rolls 11 and backup rolls 21 are made to cross with each other by turning them in the opposite directions to each other between the upper and lower rolls about their central portions in the axial direction of the rolls, and a sheet crown of a rolled material S is controlled by adjusting this cross angle.
  • Fig. 9 shows a backup roll in one example of a sleeve roll type rolling mill in the prior art in cross-section
  • this backup roll 10 is composed of a roll support shaft 1 which is provided with a central eccentric portion 2, intermediate eccentric portions 3 and opposite end eccentric portions 4 and is rotatable, outer rings divided into 5 pieces along its axial direction and respectively fitted around the respective eccentric portions 2, 3 and 4 via rolling bearings 5 in a freely rotatable manner, that is, divided rolls 7, 8 and 9, and a sleeve 6 accommodating these respective divided rolls 7, 8 and 9 and adapted to rotate jointly with the respective divided rolls 7, 8 and 9 according to rotation of the work rolls 11.
  • Fig. 10 shows eccentric states of the centers C 2 , C 3 and C 4 of the respective eccentric portions 2, 3 and 4 with respect to the axis C 1 of the roll support shaft 1 and rotation loci of the respective divided rolls 7, 8 and 9, and crown patterns of the work roll 11 at the respective rotation angles are as shown in Fig. 11. And, a sheet configuration of a rolled material S is controlled by depressing the work roll 11 with the roll support shaft 1 rotated to an appropriate angle.
  • the heretofore known cross-roll type rolling mill shown in Fig. 8 has a shortcoming that while a sheet crown such as simple center elongation, end elongation or the like of a rolled material can be controlled by gap adjustment between the upper and lower work rolls which corresponds to a V-shaped crown of a work roll caused by roll bending, complex elongation in which center elongation, middle elongation, end elongation and the like coexist cannot be controlled.
  • CM cross-roll type rolling mill
  • VCR variable crown rolls
  • SBUR sleeve type backup roll
  • a rolling mill including a roll-crossing device for making respective axes of upper and lower work rolls and upper and lower backup rolls held in circumferential contact with said work rolls cross with each other within a plane in parallel to a rolled sheet surface; wherein said upper and/or said lower backup roll is/are constructed as a sleeve-roll type backup roll, in which the backup roll is divided into three or more rolls along its axial direction, said plurality of divided rolls are rotatably mounted as held eccentric on one roll support shaft whose rotary angle is adjustable, and said plurality of divided rolls are all accommodated with one sleeve.
  • this rolling mill includes drive means for normally and reversely rotating said work rolls and making a rolled metal sheet material reciprocate between said work rolls.
  • a reversible type rolling mill in which the work rolls are rotated in the normal and reverse directions and a rolled metal sheet is made to reciprocate between the work rolls, can be formed.
  • the rolling mill according to the present invention having the above-featured construction can effectively reveal its configuration Control capability, when it is disposed at the location where a rolled material forming a final product is to be rolled, that is, as a rear stage rolling mill including at least the last stage in a train of a reversible rolling mill and cold or hot steel belt rolling mills.
  • the rolling mill according to the present invention can be constructed with the sleeve-roll type backup roll having the above-mentioned construction employed as either one of the upper and lower backup rolls.
  • a sheet crown of a rolled material and complex sheet configuration defects such as complex elongations or the like can be simultaneously controlled by forming at least either one of upper and lower backup rolls held in circumferential contact with work rolls as a sleeve-roll type backup roll, forming a crown pattern on the work roll by depressing that backup roll, further making at least the upper and lower work rolls cross with each other, adjusting the cross angle, and forming an optimum crown pattern on the work roll by adding a V-shaped crown to the above-described crown pattern.
  • reference numeral 12 designates upper and lower work roll chocks, which respectively support upper and lower work rolls.
  • the axes of the upper and lower work rolls 11 are disposed so as to cross with each other within a plane in parallel to a sheet surface of the rolled sheet material.
  • Reference numeral 13 designates upper and lower backup roll chocks, which respectively support roll support shafts 1 of upper and lower backup rolls 10 held in circumferential contact with the work rolls 11.
  • the backup rolls 10 also have their axes arranged so as to cross with each other.
  • the work roll chocks 12 and the backup roll chocks 13 are mounted as fitted slidably in the vertical direction in respective cross-heads 14 embedded slidably in the direction of a line within the both inside portions of a housing 20.
  • Reference numeral 15 designates hydraulic cylinders, which are fixedly disposed respectively on the both outside portions of the housing 20, and whose rod portions 16 penetrate through the housing 20 and are connected to the respective cross-heads 14.
  • Reference numeral 17 designates worm wheels respectively fitted and secured to the upper and lower roll support shafts 1, and numeral 18 designates worms rotated by drive units not shown.
  • the backup roll 10 is, similarly to the heretofore known apparatus shown in Fig. 9, composed of a roll support shaft 1 provided with a central eccentric portion 2, intermediate eccentric portions 3 and opposite end eccentric portions 4 and rotating, outer rings divided into five pieces along the axial direction and respectively rotatably fitted around the respective eccentric portions 2, 3 and 4 via rolling bearings 5, that is, divided rolls 7, 8 and 9, and a sleeve 6 accommodating these respective divided rolls 7, 8 and 9 and rotating jointly with the respective divided rolls 7, 8 and 9 accompanying rotation of the work roll 11.
  • Reference numeral 7 designates a central divided roll
  • numeral 8 designates intermediate divided rolls
  • numeral 9 designates opposite end divided rolls.
  • the upper and lower work rolls 11 disposed with their axes crossed with each other are driven to rotate, and by rotating the roll support shafts 1 of the upper and lower backup rolls 10 via the worms 18 and the worm wheels 17, crown patterns are formed respectively on the upper and lower work rolls 11.
  • the upper and lower work rolls 11 and backup rolls 10 are further turned about their central portion in the axial direction by means of the hydraulic cylinders 15 to make the upper and lower rolls cross with each other, and defective sheet shape such as a sheet crown and complex elongation of the rolled material S is controlled by adjusting this cross angle.
  • a sleeve-roll type backup roll could be disposed only on either one side of the upper and lower sides.
  • only the upper and lower work rolls could be made to cross with each other without making the backup rolls cross with each other.
  • the present invention could be applied to a reversible type rolling mill, in which there are provided a drive unit for normally and reversely rotating the work rolls and reversible traveling equipments in the front and the rear of the mill, and in which rolling is effected by making a rolled sheet material reciprocate through the mill.
  • the rolling mill according to the present invention has a sheet shape control capability adaptable to every type of defective sheet shape of a rolled material. Accordingly, it is preferable to equip the rolling mill according to the present invention at the place where a rolled material used as a final product is rolled, and more specifically, it is preferable to be equipped in later stages at least including the final stage of a train of reversible rolling mills and cold- or hot-steel belt rolling mills.
  • a back-up roll having the construction shown in Fig. 9 was employed in a rolling mill according to the present invention, illustrating the crown patterns, they have the varieties shown in Fig. 3.
  • the column captioned "eccentric state" corresponds to Fig. 10, but for the sake of simplicity, only the eccentric positions of the centers C 2 , C 3 and C 4 of the respective eccentric portions 2, 3 and 4 are shown.
  • meaning of a parenthesized description such as (9 smaller diameter) is indication of the fact that a crown pattern is finely adjusted by selecting the diameters of the opposite end divided rolls 9 smaller than the diameters of the other two kinds (central 7 and intermediate 8) divided rolls. From Fig. 3 it is seen that an arbitrary crown pattern can be formed by appropriately selecting the eccentric state.
  • a controllable range of a sheet crown including a common 4-stage rolling mill was compared in detail through numerical calculation.
  • a sheet crown is represented here by the following numerical values.
  • Rolling conditions are three standards of sheet widths of 800 mm, 1300 mm and 2000 mm, and a rolling load is 0.8 tf/mm.
  • a cross angle of a cross-roll type rolling mill was set at 1.5 degrees/one side by work roll bending, and a sleeve-roll type backup roll was applied to only either one of the upper and lower backup rolls.
  • Results of calculation are shown in Fig. 6.
  • the respective rolling mill types are indicated along the abscissa, and three types of rolling mills including a 4-stage rolling mill, a sleeve-roll type backup roll rolling mill and further a sleeve-roll type backup roll rolling mill provided with a roll-crossing device according to the present invention, were compared.
  • a lower half of Fig. 6 shows a controllable range of a sheet crown C 2 in the sheet width end portion, while an upper half of Fig. 6 shows a control amount ⁇ C 4 of a sheet crown C 4 in the quarter portion.
  • a crown of a sheet at the time of employing various crown control functions is shown taking the sheet crown C 2 in the sheet width end portion along an ordinate and the sheet crown C 4 in the quarter portion along an abscissa.
  • a rhombus formed by connecting points A, B, C and D represents variation of a sheet crown when a sleeve-roll type backup roll is revolved one turn with a roll cross angle fixed at zero degree.
  • a sheet crown can take any arbitrary point within a hexagon formed by connecting points A, B, B', D', C', and C.
  • the quarter portion sheet crown control amount ⁇ C 4 shown in the upper half of Fig. 6 is representation of a width in the direction of the abscissa of this hexagon.
  • a V-shaped crown can be further added to the V-, W-, A- and M-shaped crown patterns formed by the sleeve-roll type backup rolls owing to provision of both a roll-crossing device and sleeve-roll type backup rolls, the respective crown patterns are further diversified, a sheet crown of a rolled material and complex sheet configuration defects such as composite elongations can be simultaneously controlled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Control Of Metal Rolling (AREA)

Claims (3)

  1. Laminoir comprenant un dispositif de croisement des cylindres pour permettre le maintien des axes respectifs des cylindres de travail supérieur et inférieur (11) et des cylindres d'appui supérieur et inférieur (10) dans un contact circonférentiel avec lesdits cylindres de travail s'entrecroisant dans un plan parallèlement à une surface de plaque laminée ;
    caractérisé en ce que ledit cylindre d'appui supérieur et/ou ledit cylindre d'appui inférieur (10) est/sont construit(s) comme un cylindre d'appui du type composite, dans lequel le cylindre d'appui est divisé en trois cylindres ou plus le long de son sens axial, ladite pluralité de cylindres divisés (2, 3, 4) sont montés de manière à pouvoir tourner en étant maintenus de façon excentrique sur un arbre d'appui de cylindres (1) dont l'angle rotatif est ajustable, et ladite pluralité de cylindres divisés (2, 3, 4) sont tous logés avec un manchon (6).
  2. Laminoir selon la revendication 1, caractérisé en ce que ledit laminoir comprend des moyens d'entraínement pour mettre en rotation normalement et en sens inverse lesdits cylindres de travail (11) et permettre à une matière de plaque de métal laminée d'aller et venir entre lesdits cylindres de travail (11).
  3. Utilisation d'un laminoir selon les revendications 1 ou 2 à l'étape finale d'un train de laminoir d'une bande transporteuse en acier.
EP93116369A 1993-10-07 1993-10-08 Laminoir Revoked EP0647486B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9304173A BR9304173A (pt) 1993-10-07 1993-10-07 Laminador
DE1993616752 DE69316752T2 (de) 1993-10-08 1993-10-08 Walzwerk
EP93116369A EP0647486B1 (fr) 1993-10-07 1993-10-08 Laminoir

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9304173A BR9304173A (pt) 1993-10-07 1993-10-07 Laminador
EP93116369A EP0647486B1 (fr) 1993-10-07 1993-10-08 Laminoir

Publications (2)

Publication Number Publication Date
EP0647486A1 EP0647486A1 (fr) 1995-04-12
EP0647486B1 true EP0647486B1 (fr) 1998-01-28

Family

ID=25664584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116369A Revoked EP0647486B1 (fr) 1993-10-07 1993-10-08 Laminoir

Country Status (2)

Country Link
EP (1) EP0647486B1 (fr)
BR (1) BR9304173A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0941787A1 (fr) * 1998-03-09 1999-09-15 Sms Schloemann-Siemag Aktiengesellschaft Element support pour une installation de coulée continue

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117564084B (zh) * 2024-01-17 2024-04-26 太原科技大学 镁合金板材及改善其各向异性的异步角轧组合轧制工艺

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6036321B2 (ja) * 1980-07-21 1985-08-20 住友金属工業株式会社 圧延機
JPS61202704A (ja) * 1985-03-07 1986-09-08 Mitsubishi Heavy Ind Ltd ロ−ルクロス式圧延機
JPS61279305A (ja) * 1985-06-06 1986-12-10 Ishikawajima Harima Heavy Ind Co Ltd 圧延機
WO1990000450A1 (fr) * 1988-07-11 1990-01-25 DAVID McKEE (POOLE) LIMITED Laminage de materiau en bande
CH673128A5 (en) * 1988-07-11 1990-02-15 Escher Wyss Gmbh Pliable roller paper press - has adjustable angle between roller axes to give variety of pressures without roller change
JP2836843B2 (ja) * 1989-04-25 1998-12-14 三菱重工業株式会社 圧延機の分割型ロール
JP2665006B2 (ja) * 1989-10-25 1997-10-22 三菱重工業株式会社 分割バックアップロールを用いた圧延機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0941787A1 (fr) * 1998-03-09 1999-09-15 Sms Schloemann-Siemag Aktiengesellschaft Element support pour une installation de coulée continue

Also Published As

Publication number Publication date
BR9304173A (pt) 1995-06-06
EP0647486A1 (fr) 1995-04-12

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