EP3981522B1 - Laminoir - Google Patents

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Publication number
EP3981522B1
EP3981522B1 EP19949862.7A EP19949862A EP3981522B1 EP 3981522 B1 EP3981522 B1 EP 3981522B1 EP 19949862 A EP19949862 A EP 19949862A EP 3981522 B1 EP3981522 B1 EP 3981522B1
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EP
European Patent Office
Prior art keywords
roll
cylinders
cylinder
bearing
bending
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.)
Active
Application number
EP19949862.7A
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German (de)
English (en)
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EP3981522A1 (fr
EP3981522A4 (fr
Inventor
Kenji Horii
Tatsunori Sugimoto
Takao Owada
Akira Sako
Hiroaki Watanabe
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Primetals Technologies Japan Ltd
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Primetals Technologies Japan Ltd
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Publication of EP3981522A4 publication Critical patent/EP3981522A4/fr
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    • 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
    • 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
    • B21B13/142—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 by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • 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
    • 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
    • B21B2269/00—Roll bending or shifting
    • B21B2269/02—Roll bending; vertical bending of rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting 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
    • B21B37/42—Control of flatness or profile during rolling of strip, sheets or plates using a combination of roll bending and axial shifting of the rolls

Definitions

  • the present invention relates to a rolling mill.
  • Patent Document 1 describes one example of rolling mills that can prevent occurrence of extreme offset loads on bearings, and make it possible to attempt to extend the service life of the bearings, increase the roll shift amount, and in turn improve the capability of correcting the shape of a rolled material.
  • each pressure of a plurality of bending cylinders arranged along the roll-axis direction is made adjustable. That is, for example, the hydraulic pressure of a cylinder proximate to the lengthwise center of the bearing is set high, and the hydraulic pressure of a cylinder not proximate to the lengthwise center of the bearing is set low. Thereby, the resultant force of the bending force is caused to act on the bearing at the lengthwise center of the bearing even if the acting positions of the bending force are different.
  • EP 0 084 927 A1 discloses a rolling mill according to the preamble of claim 1. Further related devices are disclosed in EP 0 283 342 A1 , JP 2000 015310 A , JP H02 70311 A and WO 2022/122069 A1 .
  • Patent Document 1 JP S6355369 B2
  • Patent Document 1 describes one example of a technology for suppressing offset loads to act on bearings, and extending the lifetime of the bearings.
  • each cylinder pressure can be adjusted such that the resultant force of bending force acting on a bearing acts on a middle portion of the bearing in the roll-axis direction.
  • the rolling mill requires a large number of bending cylinders according to shifting of rolls, and furthermore requires a large number of mechanisms for adjusting pressing force of the cylinders.
  • Patent Document 1 eight cylinders and at least four adjustment mechanisms are required per bearing. Since the number of components of such a rolling mill increases, there is room for improvement in terms of simplification of the structure.
  • An object of the present invention is to provide a rolling mill having a structure that can reduce offset loads on bearings even with a simple structure as compared to conventional rolling mills.
  • the present invention includes plurality of means for solving the problem described above, and one example thereof is a rolling mill including: a roll that is shifted in an axial direction; a bearing that is shifted in a roll-axis direction along with the roll and receives a load from the roll; and three or more first cylinders that apply bending force vertically to the bearing to cause the roll to perform bending, in which the bearing and the first cylinders are provided on each a drive side and an work side of the roll, two first cylinders among the first cylinders are provided in the roll-axis direction on the exit side or entry side in a rolling direction, one first cylinder among the first cylinders is provided on a side that is one of the exit side and the entry side in the rolling direction, and that is opposite to a side provided with the two first cylinders, and the first cylinder on the opposite side is positioned between the two first cylinders when viewed from the exit side or entry side in the rolling direction.
  • FIG. 1 is a figure illustrating an overview of a rolling facility including a rolling mill according to the present first embodiment.
  • FIG. 2 is a front view for explaining an overview of the rolling mill.
  • FIG. 3 is a figure illustrating part of a cross-sectional view taken along A-A' in FIG. 2 .
  • FIG. 4 is a figure illustrating part of a cross-sectional view taken along B-B' in FIG. 2 .
  • FIG. 5 is a plan view for explaining details of an intermediate-roll portion.
  • FIG. 1 the overview of the rolling facility including the rolling mill according to the present embodiment is explained by using FIG. 1 .
  • a rolling facility 1 has: a plurality of rolling mills that perform hot rolling of a rolled material 5 into a strip; and a controller 80.
  • the rolling mills include seven stands, which are a first stand 10, a second stand 20, a third stand 30, a fourth stand 40, a fifth stand 50, a sixth stand 60 and a seventh stand 70, from the rolled material 5 entry side.
  • Each the first stand 10, the second stand 20, the third stand 30, the fourth stand 40, the fifth stand 50, the sixth stand 60 and the seventh stand 70 in the stands, and a portion of the controller 80 that controls the stands correspond to what is called a rolling mill in the present invention.
  • rolling facility 1 is not limited to a facility including seven stands like the one illustrated in FIG. 1 , and can be a facility including at least two stands.
  • FIG. 2 part of the overview of the rolling mill according to the present invention is explained by using FIG. 2 .
  • the seventh stand 70 illustrated in FIG. 1 is explained as an example in FIG. 2
  • the rolling mill according to the present invention can be applied to any stand of the first stand 10, the second stand 20, the third stand 30, the fourth stand 40, the fifth stand 50, and the sixth stand 60 illustrated in FIG. 1 .
  • the seventh stand 70 which is a rolling mill according to the present embodiment, is a rolling mill including six rolls that roll the rolled material 5, and has housings 700, the controller 80, and a hydraulic device (illustration omitted).
  • the housings 700 include: an upper work roll 710 and a lower work roll 711; and an upper intermediate roll 720 and a lower intermediate roll 721 that support the upper work roll 710 and the lower work roll 711 by contacting the upper work roll 710 and the lower work roll 711, respectively. Furthermore, the housings 700 include an upper backup roll 730 and a lower backup roll 731 that support the upper intermediate roll 720 and the lower intermediate roll 721 by contacting the upper intermediate roll 720 and the lower intermediate roll 721, respectively.
  • the upper work roll 710 in the rolls has, at its axial end portions and on both the drive side and the work side, bearings (omitted for the convenience of illustration) that are shifted in the roll-axis direction together with the upper work roll 710, and receive loads from the roll, and these bearings are supported by upper-work-roll bearing housings 712.
  • the lower work roll 711 also has bearings (illustration omitted) at its axial end portions and on both the drive side and the work side, and these bearings are supported by lower-work-roll bearing housings 713.
  • the upper work roll 710 is configured to be shifted in the roll-axis direction by a shift cylinder 715 like the one illustrated in FIG. 3 via a work-side upper-work-roll bearing housing 712.
  • the lower work roll 711 also is configured to be shifted in the roll-axis direction by a shift cylinder 716 like the one illustrated in FIG. 3 via a work-side lower-work-roll bearing housing 713.
  • the upper intermediate roll 720 has bearings 790 (see FIG. 5 ) at its axial end portions and on both the drive side and the work side, and these bearings 790 are supported by upper-intermediate-roll bearing housings 722A and 722, respectively.
  • the lower intermediate roll 721 also has bearings (illustration omitted) at its axial end portions and on both the drive side and the work side, and these bearings are supported by lower-intermediate-roll bearing housings 723A and 723, respectively.
  • the upper intermediate roll 720 is configured to be shifted in the roll-axis direction by a shift cylinder 725 like the one illustrated in FIG. 3 via the drive-side upper-intermediate-roll bearing housing 722A.
  • the lower intermediate roll 721 also is configured to be shifted in the roll-axis direction by a shift cylinder 726 like the one illustrated in FIG. 3 via the drive-side lower-intermediate-roll bearing housing 723A.
  • an entry-side fixation member 702 is fixed to the rolled material 5 entry-side housing 700, and on the rolled material 5 exit side, an exit-side fixation member 703 is fixed to the exit-side housing 700 such that the exit-side fixation member 703 becomes opposite to the entry-side fixation member 702.
  • upper-work-roll bending cylinders 740 provided to a work-roll bending block part 714 of the entry-side fixation member 702, an upper-work-roll bending cylinder 742 provided to an upper-intermediate-roll bending block part 727, and upper-work-roll bending cylinders 741 and 743 provided to the exit-side fixation member 703 support the upper-work-roll bearing housing 712, and, by driving these cylinders as appropriate, it is possible to apply bending force vertically to the bearing of the upper work roll 710 to cause the upper work roll 710 to perform bending.
  • lower-work-roll bending cylinders 744 and 746 provided to the entry-side fixation member 702 and lower-work-roll bending cylinders 745 and 747 provided to the exit-side fixation member 703 support the lower-work-roll bearing housing 713, and, by driving these cylinders as appropriate, it is possible to apply bending force vertically to the bearing of the lower work roll 711 to cause the lower work roll 711 to perform bending.
  • upper-intermediate-roll bending cylinders 750 provided to the upper-intermediate-roll bending block part 727 of the entry-side fixation member 702, and an upper-intermediate-roll bending cylinder 751 provided to the upper-intermediate-roll bending block part 727 of the exit-side fixation member 703 support the upper-intermediate-roll bearing housing 722 or 722A, and, by driving these cylinders as appropriate, it is possible to apply bending force vertically to the bearing 790 to cause the upper intermediate roll 720 to perform bending.
  • the upper-intermediate-roll bending block part 727 is provided with the upper-work-roll bending cylinders 742 and 743 on the entry side and the exit side, and, by driving these cylinders as appropriate, it is possible to cause the upper work roll 710 to perform bending.
  • lower-intermediate-roll bending cylinders 752 provided to a lower-intermediate-roll bending block part 728 of the entry-side fixation member 702, and a lower-intermediate-roll bending cylinder 753 provided to the lower-intermediate-roll bending block part 728 of the exit-side fixation member 703 support the lower-intermediate-roll bearing housing 723 or 723A, and, by driving these cylinders as appropriate, it is possible to apply bending force vertically to the bearing 790 to cause the lower intermediate roll 721 to perform bending.
  • the lower-intermediate-roll bending block part 728 is provided with the lower-work-roll bending cylinders 746 and 747 on the entry side and the exit side, and, by driving these cylinders as appropriate, it is possible to cause the lower work roll 711 to perform bending.
  • the upper-work-roll bending cylinders 740 and 741 (first cylinders) in these cylinders are arranged such that bending force is applied to the bearings of the upper work roll 710, which contacts the rolled material 5, toward the vertical increase side (away from the rolled material), to thereby cause the upper work roll 710 to perform bending.
  • the upper-work-roll bending cylinders 742 and 743 (fifth cylinders) are arranged such that bending force is applied to the bearings toward the vertical decrease side (in the direction toward the rolled material), which is a direction opposite to the bending force applied by the upper-work-roll bending cylinders 740 and 741, to thereby cause the upper work roll 710 to perform bending.
  • the lower-work-roll bending cylinders 744 and 745 are arranged such that bending force is applied to the bearings of the lower work roll 711 that contacts the rolled material 5 toward the vertical increase side, to thereby cause the lower work roll 711 to perform bending.
  • the lower-work-roll bending cylinders 746 and 747 are arranged such that bending force is applied to the bearings toward the decrease side, which is a direction opposite to the bending force applied by the lower-work-roll bending cylinders 744 and 745, to thereby cause the lower work roll 711 to perform bending.
  • the upper-intermediate-roll bending cylinders 750 and 751 are arranged such that bending force is applied to the bearings 790 of the upper intermediate roll 720 toward the vertical increase side, to thereby cause the roll to perform bending.
  • the lower-intermediate-roll bending cylinders 752 and 753 are arranged such that bending force is applied to the bearings 790 of the lower intermediate roll 721 toward the vertical increase side, to thereby cause the roll to perform bending.
  • the entry-side fixation member 702 on the rolled material 5 entry side is provided with upper-work-roll bearing-housing backlash elimination cylinders 760 (second cylinders) such that horizontal force, specifically pressing force in the rolling direction, is applied to the upper work roll 710 via liners (illustration omitted) of the upper-work-roll bearing housings 712.
  • the entry-side fixation member 702 is provided with lower-work-roll bearing-housing backlash elimination cylinders 762 (second cylinders) such that pressing force is applied to the lower work roll 711 in the rolling direction via liners of the lower-work-roll bearing housings 713.
  • desired force can be applied to the work roll or the like in a direction orthogonal to the roll-axis direction.
  • the exit-side fixation member 703 on the rolled material 5 exit side is provided with upper-intermediate-roll bearing-housing backlash elimination cylinders 771 (second cylinders) such that horizontal force, that is, pressing force in a direction opposite to the rolling direction, is applied to the upper intermediate roll 720 via liners of the upper-intermediate-roll bearing housings 722A and 722.
  • the exit-side fixation member 703 is provided with lower-intermediate-roll bearing-housing backlash elimination cylinders 773 (second cylinders) such that pressing force is applied to the lower intermediate roll 721 in a direction opposite to the rolling direction via liners of the lower-intermediate-roll bearing housings 723A and 723.
  • the upper backup roll 730 has bearings (illustration omitted) at its axial end portions and on both the drive side and the work side, and these bearing are supported by upper-backup roll bearing housings 732.
  • the lower backup roll 731 also has bearings (illustration omitted) at its axial end portions and on both the drive side and the work side, and these bearings are supported by lower-backup roll bearing housings 733.
  • the entry-side housing 700 is provided with upper-backup roll bearing-housing backlash elimination cylinders 780 such that horizontal force is applied to the upper backup roll 730 via the upper-backup roll bearing housings 732.
  • the entry-side housing 700 is provided with lower-backup roll bearing-housing backlash elimination cylinders 782 such that horizontal force is applied to the lower backup roll 731 via the lower-backup roll bearing housings 733.
  • the hydraulic device is connected to hydraulic cylinders such as the bending cylinders, backlash elimination cylinders, or shift cylinders that are mentioned above, or rolling cylinders (illustration omitted) that apply rolling force for rolling the rolled material 5 to the upper work roll 710 and the lower work roll 711.
  • This hydraulic device is connected to the controller 80.
  • the controller 80 performs actuation control of the hydraulic device, and supplies and discharges a hydraulic fluid to the bending cylinders and the like mentioned above, to thereby perform drive control of those cylinders.
  • the upper work roll 710, the lower work roll 711, and the lower intermediate roll 721 also can have configurations equivalent to those of the upper intermediate roll 720.
  • Their configurational details are approximately the same as those of the upper intermediate roll 720, and therefore explanations thereof are omitted.
  • the present invention is suitably applied to the upper intermediate roll 720 like the one illustrated in FIG. 5 or the lower intermediate roll 721.
  • two upper-intermediate-roll bending cylinders 750 are provided in the roll-axis direction.
  • one upper-intermediate-roll bending cylinder 751 is provided on the rolled material 5 exit side.
  • the upper-intermediate-roll bending cylinder 751 provided on the rolled material 5 exit side in the cylinders is arranged such that it is positioned between the two upper-intermediate-roll bending cylinders 750 provided on the opposite entry side when viewed in the rolling direction.
  • the axially-outer upper-intermediate-roll bending cylinder 750 in the two upper-intermediate-roll bending cylinders 750 provided on the entry side on each the drive side and the work side is arranged outside an area within which the center of the bearing 790 is shifted when the upper intermediate roll 720 is shifted in the axial direction by the shift cylinder 725 via a shift mechanism 725A.
  • the upper-intermediate-roll bearing-housing backlash elimination cylinders 771 arranged on the rolled material 5 exit side are arranged on both axial sides of the one upper-intermediate-roll bending cylinder 751 provided on the same exit side when viewed in the rolling direction.
  • an acting position of the output force of the three upper-intermediate-roll bending cylinders 750 and 751, and an acting position of the output force of the two upper-intermediate-roll bearing-housing backlash elimination cylinders 771 are arranged such that each of them is kept within L B /4 on the axially-outer side of the axial center of the bearing 790, and within L B /4 on the axially-inner side of the axial center of the bearing 790, that is, within L B /2 from the axial center of the bearing 790, when the axial length of the bearing 790 is defined as L B , or the output force is controlled in such a manner.
  • the intermediate position of the two entry-side upper-intermediate-roll bending cylinders 750, and the intermediate position of the two exit-side upper-intermediate-roll bearing-housing backlash elimination cylinders 771 are the same with each other or proximate to each other desirably.
  • the axial position of the exit-side upper-intermediate-roll bending cylinder 751 is positioned at the intermediate position of the axial positions of the two entry-side upper-intermediate-roll bending cylinders 750, that is, at the intermediate position between the two upper-intermediate-roll bearing-housing backlash elimination cylinders 771.
  • the upper-work-roll bending cylinder 742 arranged on the rolled material 5 entry side is provided at an axial position between the two upper-intermediate-roll bending cylinders 750 that are provided in the axial direction.
  • the upper-work-roll bending cylinder 743 arranged on the rolled material 5 exit side is provided at a position on the axially-inner side of the upper-intermediate-roll bending cylinder 751.
  • the controller 80 is configured to perform control such that when bending of the roll is performed, the difference between the total output force of the two first cylinders, and the output force of the first cylinder provided on the opposite side is within a predetermined range.
  • the resultant force of the roll bending cylinders is caused to act on the roll-axis line.
  • the controller 80 is configured to drive any one of or both of the two upper-intermediate-roll bending cylinders 750 arranged on the entry side, and drive the first cylinder provided on the opposite side, according to the shift position of the upper intermediate roll 720.
  • the shift amount of the upper intermediate roll 720 that is, the shift amount of the axial center of the bearing 790, is defined as L S (the shift amount toward the drive direction is defined as a positive amount).
  • the bearing center exists in any of sections A, B, and C illustrated in FIG. 5 .
  • the bearing center exists in the section C, on the drive side, the axially-inner cylinder in the entry-side upper-intermediate-roll bending cylinders 750 is not driven, but the axially-outer upper-intermediate-roll bending cylinder 750 and the exit-side upper-intermediate-roll bending cylinder 751 are driven.
  • the total output force of the driven cylinders on the entry side and the exit side acts on a position near the intersection of the roll-axis line and a line linking the driven cylinders.
  • the acting position of the total output force of the cylinders is arranged such that it is kept within L B /4 on the axially-outer side of the axial center of the bearing 790, and within L B /4 on the axially-inner side of the axial center of the bearing 790, that is, within L B /2 from the axial center of the bearing 790.
  • the boundary between the section A and the section B exists at a position within L B /4 on the axially-outer side of the intersection of the roll-axis line and a straight line linking the axially-inner entry-side upper-intermediate-roll bending cylinder 750 and the exit-side upper-intermediate-roll bending cylinder 751.
  • the boundary between the section B and the section C exists at a position within L B /4 on the axially-inner side of the intersection of the roll-axis line and a straight line linking the axially-outer entry-side upper-intermediate-roll bending cylinder 750 and the exit-side upper-intermediate-roll bending cylinder 751.
  • the axially-outer cylinder in the entry-side upper-intermediate-roll bending cylinders 750 is not driven, but the axially-inner upper-intermediate-roll bending cylinder 750 and the exit-side upper-intermediate-roll bending cylinder 751 are driven.
  • the axially-inner cylinder in the entry-side upper-intermediate-roll bending cylinders 750 is not driven, but the axially-outer upper-intermediate-roll bending cylinder 750 and the exit-side upper-intermediate-roll bending cylinder 751 are driven.
  • the output force of both of the entry-side upper-intermediate-roll bending cylinders 750 is made 1/2 such that the total becomes the same as the output force of the exit-side upper-intermediate-roll bending cylinder, and the exit-side upper-intermediate-roll bending cylinder 751 is driven similarly to the cases of the sections A and C.
  • both of the two cylinders are driven at output force which is 1/2 of required output force.
  • the output force of the upper-intermediate-roll bending cylinders 750 and 751 and the output force of the upper-intermediate-roll bearing-housing backlash elimination cylinders 771 have three states, which are the ON state, 1/2 ON state and OFF state, in the case explained in the example described above, by separately and more finely adjusting the output force of each upper-intermediate-roll bending cylinder 750 or 751 and the output force of each upper-intermediate-roll bearing-housing backlash elimination cylinder 771, it is possible to cause the bending force to be applied onto the axial center of the bearing 790 more accurately.
  • one example of different output control is explained.
  • the axially-outer upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying total output force of the two upper-intermediate-roll bending cylinders 750 by ⁇ 1, the axially-inner upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying the total output force by ⁇ 2, the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • the two upper-intermediate-roll bending cylinders 750 are driven along with the upper-intermediate-roll bending cylinder 751 in this manner.
  • ⁇ 1 is set to 1
  • ⁇ 2 is set to 0, and the axially-outer upper-intermediate-roll bending cylinder 750 and the upper-intermediate-roll bending cylinder 751 are driven.
  • the axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying required output force by a predetermined coefficient ⁇ 1
  • the axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying the required output force by a predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • only the axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven.
  • the axially-outer upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying total output force of the two upper-intermediate-roll bending cylinders 750 by ⁇ 1, the axially-inner upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying the total output force by ⁇ 2, the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • the two upper-intermediate-roll bending cylinders 750 are driven along with the upper-intermediate-roll bending cylinder 751 in this manner.
  • ⁇ 1 is set to 0
  • ⁇ 2 is set to 1
  • the axially-inner upper-intermediate-roll bending cylinder 750 and the upper-intermediate-roll bending cylinder 751 are driven.
  • the axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying required output force by the predetermined coefficient ⁇ 1
  • the axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying the required output force by the predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • only the axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven.
  • the axially-outer upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying total output force of the two upper-intermediate-roll bending cylinders 750 by ⁇ 1
  • the axially-inner upper-intermediate-roll bending cylinder 750 is driven at output force obtained by multiplying the total output force by ⁇ 2
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • the two upper-intermediate-roll bending cylinders 750 are driven along with the upper-intermediate-roll bending cylinder 751 in this manner.
  • the axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying required output force by the predetermined coefficient ⁇ 1
  • the axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven at output force obtained by multiplying the required output force by the predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • the actuation position can be kept within L B /2 from the axial center of the bearing 790 when the bearing center exists in the section B, but the actuation position cannot be kept within L B /2 from the axial center of the bearing 790 when the bearing center exists in the section C or the section A in some cases.
  • ⁇ 1 and ⁇ 2 it becomes possible to keep the actuation position within L B /2 from the axial center of the bearing 790 in each of the cases of the sections A, B, and C.
  • ⁇ 1 and ⁇ 2 for each area need not be the same values, and can be set to different values as appropriate for each area such that the acting position of the total of the output force of the two upper-intermediate-roll bending cylinders 750 and the output force of the upper-intermediate-roll bending cylinder 751 approximately matches the center position of the bearing 790.
  • the values of ⁇ 1 and ⁇ 2 for each area need not be the same values, and can be set to different values as appropriate for each area such that the acting position of the output force of the two upper-intermediate-roll bearing-housing backlash elimination cylinders 771 approximately matches the center position of the bearing 790.
  • the rolling mill according to the first embodiment of the present invention mentioned above includes: a roll that is shifted in the axial direction; a bearing that is shifted in the roll-axis direction along with the roll, and receives a load from the roll; and three or more first cylinders that apply bending force vertically to the bearing to cause the roll to perform bending, and the bearing and the first cylinders are provided on each the drive side and the work side.
  • Two first cylinders in the first cylinders are provided in the roll-axis direction on the rolled material 5 entry side or exit side, one first cylinder in the first cylinders is provided on a side which is one of the rolled material 5 exit side and entry side, and is opposite to a side provided with the two first cylinders, and the first cylinder on the opposite side is positioned between the two first cylinders when viewed in the rolling direction.
  • first cylinders in the two first cylinders are arranged outside an area within which the center of the bearing is shifted, it is possible to cause the resultant force of the bending force of the first cylinders to act on a position near the lengthwise middle portion of the bearing more accurately and surely, and it is possible to reduce offset loads on the bearing more surely.
  • second cylinders that apply pressing force to the bearing 790 in the rolling direction or in a direction opposite to the rolling direction are further included in one of the entry-side fixation member 702 and the exit-side fixation member 703 that are fixed to the housings 700 at least on either the rolled material 5 entry-side or exit-side, and are provided with the first cylinders.
  • the bearings and the first cylinders are prevented from moved in the rolling direction at the time of biting of the top of the rolled material 5.
  • an advantage of preventing the bending acting position from moved can be attained. That is, it is possible to suppress the movement of the bearings in the rolling direction in a state in which the bending force is acting thereon. Accordingly, a slip does not occur at portions that are pressed by the first cylinders, and it is possible to suppress damages to the first cylinders and wear on the pressed side, and to keep the bending precision high.
  • the second cylinders that apply pressing force to the bearing in a rolling direction or in a direction opposite to the rolling direction are further included on either the entry side or the exit side, and the second cylinders are arranged on both of axial sides of the first cylinder when the rolling mill is viewed in the rolling direction, it becomes easier to cause the pressing force of the second cylinders to act on a position near the lengthwise middle portion of the bearing, and it is possible to make it more difficult for the bearings and the first cylinders to shift in the rolling direction at the time of biting of the rolled material. Accordingly, the bending precision can be kept higher.
  • FIG. 6 illustrates a case where the pressing force of a second cylinder acts on a position near the lengthwise middle portion of the bearing in a case where only the drive-side axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven.
  • the pressing force of the second cylinder is Fg2
  • the outer reaction force and inner reaction force generated to liners of the upper-intermediate-roll bearing housing 722A and the upper-intermediate-roll bending block part 727 are F1 and F2, respectively.
  • Fg2 Fd + F1 + F2. If any of F1 and F2 becomes 0, the liners are out of contact, and this is not preferable.
  • Fg2 is generated near the Fd-acting position, and therefore, Fg2 can be made a relatively small value. That is, the pressing force of the second cylinder can be reduced.
  • FIG. 7 illustrates a case where the pressing force of a second cylinder acts on a position away from a position near the lengthwise middle part of the bearing in a case where only the drive-side axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771 is driven.
  • Fg1 inevitably becomes a large value for the balance of moments. This makes it necessary to use larger second cylinders, and it becomes structurally difficult to house such large cylinders in the upper-intermediate-roll bending block part 727.
  • FIG. 6 by causing the pressing force of the second cylinders to act on a position near the lengthwise middle portion of the bearing, the output force required of the second cylinders can be reduced, and the size of the cylinders can be reduced. Thereby, they can be housed in the upper-intermediate-roll bending block part 727.
  • the controller 80 that drives the first cylinders is further included, and the controller 80 is configured to drive any one first cylinder in the two first cylinders and drive the first cylinder provided on the opposite side when bending of the roll is performed and also the center of the bearing is arranged on the outer side of X, which is defined as an intersection of the roll-axis line and a straight line linking the outer first cylinder and the first cylinder provided on the opposite side, or is arranged on the inner side of Y, which is defined as an intersection of the roll-axis line and a straight line linking the inner first cylinder and the first cylinder provided on the opposite side.
  • controller 80 that drives the first cylinders is further included, and the controller 80 is configured to perform control such that when bending of the roll is performed, the difference between the total output force of the two first cylinders and the output force of the first cylinder provided on the opposite side is within a predetermined range. Thereby, it is possible to cause almost the same bending force to act on the entry side and the exit side of the bearing, and it is possible to keep the roll stably.
  • the upper intermediate roll 720 and the lower intermediate roll 721 typically have large shift amounts.
  • the upper work roll 710 and the lower work roll 711 that contact the rolled material 5, and the upper intermediate roll 720 and the lower intermediate roll 721 that contact the upper work roll 710 and the lower work roll 711 are included, and the roll is used as the upper intermediate roll 720 and the lower intermediate roll 721.
  • the fifth cylinders also to the same members as the first cylinders, and it is possible to attempt to save spaces.
  • FIG. 8 The rolling mill according to a second embodiment of the present invention is explained by using FIG. 8 .
  • the same configurations as the first embodiment are denoted with the same reference characters, and explanations thereof are omitted. The same applies also to the following embodiments.
  • one upper-intermediate-roll bending cylinder 750A (first cylinder) is provided in the roll-axis direction on the rolled material 5 entry side, and two upper-intermediate-roll bending cylinders 751A (first cylinders) are provided on the rolled material 5 exit side.
  • the upper-intermediate-roll bending cylinder 750A provided on the rolled material 5 entry side in the upper-intermediate-roll bending cylinders is arranged such that it is positioned between the two upper-intermediate-roll bending cylinders 751A provided on the opposite exit side when viewed in the rolling direction.
  • an upper-intermediate-roll bearing-housing backlash elimination cylinder 771A arranged on the rolled material 5 exit side is arranged, in the axial direction, between the two upper-intermediate-roll bending cylinder 751A provided on the same exit side when viewed in the rolling direction.
  • the axial positions of the upper-intermediate-roll bending cylinder 750A provided on the entry side and the exit-side upper-intermediate-roll bearing-housing backlash elimination cylinder 771A are desirably the same.
  • the boundary between the section B and the section C exists at a position within L B /4 on the axially-inner side of the intersection of the entry-side upper-intermediate-roll bending cylinder 750A and the axially-outer exit-side upper-intermediate-roll bending cylinder 751A.
  • the bearing center exists in the section C, on the drive side, the entry-side upper-intermediate-roll bending cylinder 750A is driven, and the axially-inner cylinder in the exit-side upper-intermediate-roll bending cylinders 751A is not driven, but the axially-outer cylinder is driven.
  • the entry-side upper-intermediate-roll bending cylinder 750A is driven, and the axially-outer cylinder in the exit-side upper-intermediate-roll bending cylinders 751A is not driven, but the axially-inner cylinder is driven.
  • the boundary between the section A and the section B exists at a position within L B /4 on the axially-outer side of the intersection of the entry-side upper-intermediate-roll bending cylinder 750A and the axially-inner exit-side upper-intermediate-roll bending cylinder 751A.
  • the entry-side upper-intermediate-roll bending cylinder 750A is driven, and the axially-outer cylinder in the exit-side upper-intermediate-roll bending cylinders 751A is not driven, but the axially-inner cylinder is driven.
  • the entry-side upper-intermediate-roll bending cylinder 750A is driven, and the axially-inner cylinder is not driven, but the axially-outer cylinder is driven.
  • the entry-side upper-intermediate-roll bending cylinder 750A is driven similarly to the cases of the sections A and C, and the output force of both of the exit-side upper-intermediate-roll bending cylinders 751A is made 1/2 such that the total thereof becomes the same as the output force of the entry-side upper-intermediate-roll bending cylinder.
  • the upper-intermediate-roll bearing-housing backlash elimination cylinder 771A is driven no matter which of the sections A, B, and C in TABLE 2 the bearing center exists in.
  • the configuration/action is approximately the same as the configuration/action of the rolling mill according to the first embodiment mentioned before, and details thereof are omitted.
  • the bearing center exists in any of sections A, B, and C illustrated in FIG. 8 .
  • the second cylinder is positioned almost at the intermediate position of Ls. Accordingly, it becomes easier to cause the pressing force of the second cylinder to act on a position near the lengthwise middle portion of the shifted bearing, the output force required of the second cylinder can be reduced, and the size of the cylinder can be reduced. Thereby, it can be housed in the upper-intermediate-roll bending block part 727. Thereby, it becomes possible to make it difficult for the bearing and the first cylinders to shift in the rolling direction at the time of biting of the rolled material, and thus the bending precision can be kept higher.
  • the axially-outer upper-intermediate-roll bending cylinder 751A is driven at output force obtained by multiplying total output force of the two upper-intermediate-roll bending cylinders 751A by ⁇ 1
  • the axially-inner upper-intermediate-roll bending cylinder 751A is driven at output force obtained by multiplying the total output force by ⁇ 2
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted such that the acting position of the total output force is almost at the bearing center.
  • the two upper-intermediate-roll bending cylinders 751A can be driven along with the upper-intermediate-roll bending cylinder 750A in this manner also.
  • the rolling mill according to the present embodiment illustrated in FIG. 9 corresponds to the rolling mill according to the first embodiment, but is different in that it includes, between the two rolled material 5 entry-side upper-intermediate-roll bending cylinders 750, an upper-intermediate-roll bending cylinder 750B (third cylinder) that further applies bending force vertically to the bearing 790 to cause the roll to perform bending.
  • the upper-intermediate-roll bending cylinder 750B is arranged so as to apply bending force toward the increase side.
  • the shift amount of the bearing 790 is defined as L s , and L s is divided into sections A, B, C, and D.
  • TABLE 3 illustrates a relation between the bearing-center position and the state of driving of each cylinder.
  • the intersection position of the roll-axis line and a line linking e1 and d1 is the boundary between the section D and the section C.
  • the intersection position of the roll-axis line and a line linking e3 and d1 is the boundary between the section B and the section A.
  • the axially-outer upper-intermediate-roll bending cylinder 750,e1 is driven at output force obtained by multiplying required entry-side bending force Pbe by a predetermined coefficient ⁇ 1
  • an upper-intermediate-roll bending cylinder 750B,e2 is driven at output force obtained by multiplying the required entry-side bending force Pbe by a predetermined coefficient ⁇ 2
  • the upper-intermediate-roll bending cylinder 751,d1 is driven.
  • the upper-intermediate-roll bending cylinder 750B,e2 is driven at output force obtained by multiplying the required entry-side bending force Pbe by the predetermined coefficient ⁇ 2
  • an axially-inner upper-intermediate-roll bending cylinder 750,e3 is driven at output force obtained by multiplying the required entry-side bending force Pbe by a predetermined coefficient ⁇ 3
  • the upper-intermediate-roll bending cylinder 751,d1 is driven.
  • the resultant force of the entry-side bending force Pbe and the exit-side bending force Pbd is adjusted such that it becomes bending force required for the roll, and the resultant force is adjusted such that it acts on a position near the axial center of the roll.
  • an axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771,g1 is driven at output force obtained by multiplying required backlash elimination pressing force Pg by the predetermined coefficient ⁇ 1
  • an axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771,g2 is driven at output force obtained by multiplying the required backlash elimination pressing force Pg by the predetermined coefficient ⁇ 2.
  • the values of ⁇ 1, ⁇ 2, and ⁇ 3 for each area need not be the same values, and can be set to different values as appropriate for each area such that the acting position of the output force of the four upper-intermediate-roll bending cylinders 750, 750B, and 751, and the acting position of the output force of the two upper-intermediate-roll bearing-housing backlash elimination cylinders 771 approximately match the center position of the bearing 790.
  • the configuration/action is approximately the same as the configuration/action of the rolling mill according to the first embodiment mentioned before, and details thereof are omitted.
  • the output force of the upper-intermediate-roll bending cylinders 750, 750B, and 751 is caused to act on an upper-intermediate-roll bearing-housing flange part 822AB in FIG. 9 as roll bending force.
  • the length of the upper-intermediate-roll bearing-housing flange part 822AB is defined as L CB .
  • the axial positions of the second and subsequent upper-intermediate-roll bending cylinders 750B are not particularly limited.
  • One or more second and subsequent upper-intermediate-roll bending cylinders 750B can be arranged on the axially-outer side of the axially-outer upper-intermediate-roll bending cylinder 750, one or more second and subsequent upper-intermediate-roll bending cylinders 750B can be arranged on the axially-inner side of the axially-inner upper-intermediate-roll bending cylinder 750, and so on.
  • the entry side and the exit side in FIG. 9 can be reversed, and the upper-intermediate-roll bending cylinders 750 and the upper-intermediate-roll bending cylinder 750B can be arranged on the exit side.
  • the number of upper-intermediate-roll bending cylinders 750B is not particularly limited, and one or more upper-intermediate-roll bending cylinders 750B can be provided.
  • one or more cylinders with specifications similar to those of the upper-intermediate-roll bending cylinder 750B can be added on the entry side and the exit side.
  • the rolling mill according to the present embodiment illustrated in FIG. 10 corresponds to the rolling mill according to the first embodiment, but is different in that it further includes, on the rolled material 5 exit side, upper-intermediate-roll bending cylinders 751C (fourth cylinders) each of which is, on the drive side, at a position on an axially-outer side of, and is, on the work side, at a position on an axially-inner side of the two rolled material 5 entry-side upper-intermediate-roll bending cylinders 750 when viewed in the rolling direction.
  • the upper-intermediate-roll bending cylinders 751C are arranged to apply bending force toward the increase side.
  • the shift amount of the bearing 790 is defined as L s , and L s is divided into sections A and B.
  • TABLE 4 illustrates a relation between the bearing-center position and the state of driving of each cylinder. The intersection position of the roll-axis line and a line linking e1 and d2 is the boundary between the section B and the section A.
  • the axially-outer upper-intermediate-roll bending cylinder 750,e1 and upper-intermediate-roll bending cylinder 751C,d1 are driven at output force obtained by multiplying the required exit-side bending force Pbd by a predetermined coefficient ⁇ d1
  • the upper-intermediate-roll bending cylinder 751,d2 is driven at output force obtained by multiplying the required exit-side bending force Pbd by a predetermined coefficient ⁇ d2.
  • the axially-outer upper-intermediate-roll bearing-housing backlash elimination cylinder 771,g1 is driven at output force obtained by multiplying the required backlash elimination pressing force Pg by the predetermined coefficient ⁇ 1
  • the axially-inner upper-intermediate-roll bearing-housing backlash elimination cylinder 771,g2 is driven at output force obtained by multiplying the required backlash elimination pressing force Pg by the predetermined coefficient ⁇ 2.
  • the upper-intermediate-roll bending cylinder 750,e1 is driven at output force obtained by multiplying the required entry-side bending force Pbe by a predetermined coefficient ⁇ e1
  • an upper-intermediate-roll bending cylinder 750,e2 is driven at output force obtained by multiplying the required entry-side bending force Pbe by a predetermined coefficient ⁇ e2
  • the upper-intermediate-roll bending cylinder 751,d2 is driven.
  • coefficients ⁇ e1, ⁇ e2, ⁇ d1, and ⁇ d2 for each section need not be the same values, but are set to different values as appropriate for each section such that the acting position of the output force of the four upper-intermediate-roll bending cylinders 750,e1, 750,e2, 751C,d1, and 751,d2 approximately matches the center position of the bearing 790.
  • coefficients ⁇ 1 and ⁇ 2 for each section of the upper-intermediate-roll bearing-housing backlash elimination cylinders 771,g1 and 771,g2 need not be the same values, but are set to different values as appropriates for each section such that the acting position of the output force of the upper-intermediate-roll bearing-housing backlash elimination cylinders 771,g1 and 771,g2 approximately matches the center position of the bearing 790 or becomes as close to the center position of the bearing 790 as possible.
  • the configuration/action is approximately the same as the configuration/action of the rolling mill according to the first embodiment mentioned before, and details thereof are omitted.
  • one or more fourth cylinders that further apply bending force vertically to the bearing 790 to cause the roll to perform bending are further included at positions on an axially-outer side of the one first cylinder provided on the opposite exit side, and one of the two entry-side first cylinders is arranged between the first cylinder and the fourth cylinders that are provided on the opposite side when the rolling mill is viewed in the rolling direction. Also because of this, the area within which the bending force can be caused to act can be widened in the axial direction, and the shift amount can be increased.
  • the axial positions of the second and subsequent upper-intermediate-roll bending cylinders 751C are not particularly limited.
  • One or more upper-intermediate-roll bending cylinders 751C can be arranged between the upper-intermediate-roll bending cylinder 751C and the upper-intermediate-roll bending cylinder 751, one or more upper-intermediate-roll bending cylinders 751C can be arranged on the axially-inner side of the upper-intermediate-roll bending cylinder 751, and so on.
  • the entry side and the exit side in FIG. 10 can be reversed, and the upper-intermediate-roll bending cylinders 750 and the upper-intermediate-roll bending cylinder 751C can be arranged on the entry side.
  • the number of the upper-intermediate-roll bending cylinders 751C is not particularly limited, and one or more upper-intermediate-roll bending cylinders 751C can be provided.
  • the upper-intermediate-roll bending cylinders 751C can be added on the entry side and the exit side.
  • the rolling mill according to a fifth embodiment of the present invention is explained by using FIG. 11 .
  • the rolling mill according to the present embodiment illustrated in FIG. 11 corresponds to the rolling mill according to the first embodiment illustrated in FIG. 5 , but is different in that the upper-work-roll bending cylinders 742 and 743 and the lower-work-roll bending cylinders 746 and 747 that apply pressing force toward the decrease side are omitted.
  • the configuration/action is approximately the same as the configuration/action of the rolling mill according to the first embodiment mentioned before, and details thereof are omitted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (10)

  1. Laminoir comprenant :
    un rouleau (720) qui est décalé dans un sens axial, dans lequel le rouleau (720) est un rouleau (710) de travail qui contacte un matériau laminé ou un rouleau intermédiaire (720) qui contacte le rouleau (710) de travail ;
    un palier (790) qui est décalé dans un sens d'axe de rouleau en même temps que le rouleau (720), et reçoit une charge provenant du rouleau (720) ; et
    trois ou plus premiers cylindres (750, 751) qui appliquent une force de flexion dans le même sens vertical vers le côté vertical d'augmentation au palier pour amener le rouleau (720) à exécuter une flexion, dans lequel
    le palier et les premiers cylindres (750, 751) sont prévus sur chacun d'un côté d'entraînement et d'un côté de travail du rouleau (720), et dans lequel
    les deux premiers cylindres (750) parmi les premiers cylindres (750, 751) sont prévus dans le sens d'axe de rouleau sur le côté de sortie ou le côté d'entrée dans un sens de laminage,
    un premier cylindre (751) parmi les premiers cylindres est prévu sur un côté qui est un du côté d'entrée et du côté de sortie dans le sens de laminage, et qui est opposé à un côté prévu avec les deux premiers cylindres (750), caractérisé en ce que
    le premier cylindre (751) sur le côté opposé est positionné entre les deux premiers cylindres (750) lorsque vus du côté de sortie ou du côté d'entrée dans le sens de laminage.
  2. Laminoir selon la revendication 1, dans lequel
    un ou plus parmi les premiers cylindres dans les deux premiers cylindres (750) sont agencés à l'extérieur d'une zone à l'intérieur de laquelle un centre du palier (790) est décalé.
  3. Laminoir selon la revendication 1 ou 2, comprenant en outre :
    un élément (702, 703) de fixation qui est fixé à un logement (700) du laminoir au moins sur l'un ou l'autre du côté de sortie ou du côté d'entrée dans le sens de laminage, et qui est prévu avec les premiers cylindres (750, 751) ; et
    un deuxième cylindre (760, 762) qui est disposé sur l'un ou l'autre du côté d'entrée ou du côté de sortie de l'élément (702, 703) de fixation, et applique une force de pression au palier (790) dans un sens de laminage ou dans un sens opposé au sens de laminage.
  4. Laminoir selon l'une quelconque des revendications 1 à 3, comprenant en outre :
    sur l'un ou l'autre du côté d'entrée ou du côté de sortie, un deuxième cylindre (760, 762) qui applique une force de pression au palier (790) dans un sens de laminage ou dans un sens opposé au sens de laminage, dans lequel
    le deuxième cylindre (760, 762), lorsque le laminoir est vu du côté de sortie ou du côté d'entrée dans le sens de laminage, est agencé entre les deux premiers cylindres (741, 743) ou est agencé sur les deux côtés axiaux du premier cylindre (751).
  5. Laminoir selon l'une quelconque des revendications 1 à 4, comprenant en outre :
    un contrôleur (80) qui entraîne les premiers cylindres (750, 751), dans lequel
    le contrôleur (80) est configuré pour entraîner un quelconque premier cylindre parmi les deux premiers cylindres et entraîner le premier cylindre prévu sur le côté opposé lorsqu'une flexion du rouleau (720) est exécuté et lorsqu'un centre du palier (790) est agencé sur soit un côté axialement extérieur d'une intersection d'une ligne axiale du rouleau (720) et d'une ligne droite reliant le premier cylindre et un premier cylindre, le premier cylindre étant un premier cylindre parmi les deux premiers cylindres et étant prévu sur un côté axialement extérieur, soit un côté axialement intérieur d'une intersection de la ligne axiale du rouleau (720) et d'une ligne droite reliant le premier cylindre et un premier cylindre, le premier cylindre étant un premier cylindre parmi les deux premiers cylindres et étant prévu sur un côté axialement intérieur.
  6. Laminoir selon l'une quelconque des revendications 1 à 5, comprenant en outre :
    un contrôleur (80) qui entraîne les premiers cylindres, dans lequel
    le contrôleur (80) est configuré pour exécuter une commande telle que, lorsqu'une flexion du rouleau (720) est exécutée, une différence entre une force totale de sortie des deux premiers cylindres et une force de sortie du premier cylindre prévu sur le côté opposé est à l'intérieur d'une plage prédéterminée.
  7. Laminoir selon l'une quelconque des revendications 1 à 6, comprenant en outre :
    entre les deux premiers cylindres (750), un troisième cylindre (750B) qui applique en plus une force de flexion verticalement au palier (790) pour amener le rouleau (720) à exécuter une flexion.
  8. Laminoir selon l'une quelconque des revendications 1 à 6, comprenant en outre :
    à une position sur un côté axialement extérieur du premier cylindre (751) prévu sur le côté opposé, un ou plus quatrièmes cylindres (752, 753) qui appliquent une force de flexion verticalement au palier (790) pour amener le rouleau (720) à exécuter une flexion, dans lequel
    lorsque le laminoir est vu du côté de sortie ou du côté d'entrée dans le sens de laminage, un premier cylindre (751) parmi les deux premiers cylindres (750) est agencé entre le premier cylindre (751) et le quatrième cylindre (752, 753) qui sont prévus sur le côté opposé.
  9. Laminoir selon l'une quelconque des revendications 1 à 8, dans lequel le rouleau est le rouleau intermédiaire (720).
  10. Laminoir selon l'une quelconque des revendications 1 à 9, comprenant en outre :
    un élément (702, 703) de fixation qui est fixé à un logement (700) du laminoir au moins sur l'un ou l'autre du côté d'entrée ou du côté de sortie dans le sens de laminage, et qui est prévu avec les premiers cylindres (750) ; et
    un cinquième cylindre (744, 745) qui applique, à un palier (790) d'un rouleau (710) de travail qui contacte un matériau laminé, une force de flexion dans un sens opposé à la force de flexion appliquée par les premiers cylindres pour amener le rouleau (710) de travail à exécuter une flexion.
EP19949862.7A 2019-10-25 2019-10-25 Laminoir Active EP3981522B1 (fr)

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JPS60206508A (ja) * 1984-03-30 1985-10-18 Hitachi Ltd 作業ロール軸受箱を備えた圧延機

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BR8300010A (pt) * 1982-01-06 1983-08-30 Hitachi Ltd Laminador
JPS59229207A (ja) * 1983-06-13 1984-12-22 Hitachi Ltd 圧延機
FR2611541B1 (fr) * 1987-02-27 1994-04-29 Clecim Sa Dispositif de reglage du profil et de repartition d'usure de cylindres dans un laminoir a cylindres deplacables axialement
JP2693972B2 (ja) * 1988-09-02 1997-12-24 株式会社日立製作所 圧延機のロールシフト装置
US5924319A (en) * 1998-07-07 1999-07-20 Danieli United Roll crossing, offsetting, bending and shifting system for rolling mills
FR2786415B1 (fr) * 1998-11-30 2001-02-09 Kvaerner Metals Clecim Laminoir equipe de moyens de cambrage des cylindres de travail
CN100335189C (zh) * 2000-03-01 2007-09-05 株式会社日立制作所 轧机、轧辊轴承箱的松动消除装置
CN1213817C (zh) * 2000-03-01 2005-08-10 株式会社日立制作所 轧机及轧机改造方法
JP3526554B2 (ja) * 2001-02-13 2004-05-17 株式会社日立製作所 タンデム圧延設備及びその圧延方法
CN200977529Y (zh) * 2006-09-28 2007-11-21 北京京诚之星科技开发有限公司 改进型八辊轧机
KR101300236B1 (ko) * 2010-03-31 2013-08-26 신닛테츠스미킨 카부시키카이샤 금속 판재의 압연기 및 압연 방법

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JPS60206508A (ja) * 1984-03-30 1985-10-18 Hitachi Ltd 作業ロール軸受箱を備えた圧延機

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EP3981522A1 (fr) 2022-04-13
JPWO2021079498A1 (fr) 2021-04-29
EP3981522A4 (fr) 2022-06-29
WO2021079498A1 (fr) 2021-04-29
CN113950383B (zh) 2023-08-29
CN113950383A (zh) 2022-01-18

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