WO2021079498A1 - 圧延機 - Google Patents

圧延機 Download PDF

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Publication number
WO2021079498A1
WO2021079498A1 PCT/JP2019/041943 JP2019041943W WO2021079498A1 WO 2021079498 A1 WO2021079498 A1 WO 2021079498A1 JP 2019041943 W JP2019041943 W JP 2019041943W WO 2021079498 A1 WO2021079498 A1 WO 2021079498A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
roll
cylinders
bearing
rolling mill
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.)
Ceased
Application number
PCT/JP2019/041943
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
堀井　健治
達則 杉本
隆夫 大和田
佐古　彰
浩明 渡辺
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.)
Primetals Technologies Japan Ltd
Original Assignee
Primetals Technologies Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Primetals Technologies Japan Ltd filed Critical Primetals Technologies Japan Ltd
Priority to PCT/JP2019/041943 priority Critical patent/WO2021079498A1/ja
Priority to EP19949862.7A priority patent/EP3981522B1/en
Priority to CN201980097298.3A priority patent/CN113950383B/zh
Priority to JP2021553263A priority patent/JP7100416B2/ja
Publication of WO2021079498A1 publication Critical patent/WO2021079498A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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 provides an example of a rolling mill that can prevent the generation of an extremely unbalanced load on a bearing, prolong the service life of the bearing, increase the roll shift amount, and improve the shape correction ability of the rolled material. Allows adjustment of each pressure of a plurality of bending cylinders arranged along the roll axis direction so that the resultant force of bending forces acting on the bearing of the rolling roll always acts on the center position in the longitudinal direction of the bearing. That is, for example, the hydraulic pressure of the cylinder near the center in the longitudinal direction of the bearing is set to be large, and the hydraulic pressure of the cylinder not close to the longitudinal direction of the bearing is set to be small. However, it is described that the resultant force of the bending force is applied to the center of the bearing in the longitudinal direction.
  • the rolling mill to do has a shift function that moves the rolling roll in the roll axis direction and a bending function that applies a pressing force in the direction perpendicular to the axis to the bearing of the roll, and controls the shape of the rolled material by the action related to the roll movement and the bending force.
  • the rolling mill to do is known.
  • each cylinder pressure can be adjusted so that the resultant force of the bending force acting on the bearing acts on the central portion of the bearing in the roll axis direction.
  • This rolling mill requires a large number of bending cylinders according to the shift of the roll, and further requires a large number of mechanisms for adjusting the pressing force of each cylinder.
  • Patent Document 1 requires eight cylinders and at least four adjusting mechanisms for one bearing. Since such a rolling mill has a large number of parts, 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 capable of reducing an eccentric load on a bearing even if the structure is simpler than that of a conventional rolling mill.
  • the present invention includes a plurality of means for solving the above problems.
  • the bearing and the first cylinder are provided with three or more first cylinders that bend the roll by applying a bending force to the bearing in the vertical direction, and the bearing and the first cylinder are on the driving side and the operating side of the roll. Both are provided, and two first cylinders are provided on the inlet side or the outlet side of the rolled material in the axial direction of the roll, and the first cylinder of the outlet side or the inlet side of the rolled material is provided.
  • One of the first cylinders is provided on the side opposite to the side where the two bearings are provided, and when viewed from the exit side or the entrance side of the rolled material, the opposite side is provided between the two first cylinders.
  • the first cylinder on the side is located.
  • the eccentric load on the bearing can be reduced even with a structure simpler than that of the conventional rolling mill. Issues, configurations and effects other than those mentioned above will be clarified by the description of the following examples.
  • FIG. 1 It is a figure which shows the outline of the rolling equipment which provided the rolling mill of Example 1 of this invention. It is a front view explaining the outline of the rolling mill of Example 1.
  • FIG. It is a figure which shows a part of the cross section of AA' in FIG.
  • FIG. It is a figure which shows a part of the cross section of BB' in FIG.
  • FIG. It is a top view explaining the details of the intermediate roll part in the rolling mill of Example 1.
  • FIG. It is a figure explaining the pressing force of the 2nd cylinder in the rolling mill of Example 1 when only the upper intermediate roll bearing box inner part in the drive side in the axial direction drive only the take-off cylinder.
  • Example 1 of the rolling mill of the present invention will be described with reference to FIGS. 1 to 5.
  • FIG. 1 is a view showing an outline of a rolling equipment provided with the rolling mill of the first embodiment
  • FIG. 2 is a front view explaining an outline of the rolling mill
  • FIG. FIG. 4 is a view showing a part of the cross section taken along the line BB'of FIG. 2
  • FIG. 5 is a plan view for explaining the details of the intermediate roll portion.
  • the rolling equipment 1 is provided with a plurality of rolling mills for hot-rolling the rolled material 5 into strips, and the first stand 10, the second stand 20, and the third stand 3 are provided from the entry side of the rolled material 5. It has 7 stands of a stand 30, a 4th stand 40, a 5th stand 50, a 6th stand 60, and a 7th stand 70, and a control device 80. Of these, the portion of the first stand 10, the second stand 20, the third stand 30, the fourth stand 40, the fifth stand 50, the sixth stand 60, the seventh stand 70, and the control device 80 that controls each stand. Corresponds to the rolling mill in the present invention.
  • the rolling equipment 1 is not limited to the 7 stands as shown in FIG. 1, and may consist of at least 2 stands or more.
  • the rolling mill of the present invention has the first stand 10, the second stand 20, the third stand 30, and the fourth stand 40 shown in FIG. , 5th stand 50 and 6th stand 60 can be applied to any of the stands.
  • the seventh stand 70 which is the rolling mill of the present embodiment, is a six-stage rolling mill that rolls the rolled material 5, and includes a housing 700, a control device 80, and a hydraulic device (not shown). Have.
  • the housing 700 includes an upper work roll 710 and a lower work roll 711, and an upper intermediate roll 720 and a lower intermediate roll 721 that are supported by contacting the upper work roll 710 and the lower work roll 711, respectively. Further, it is provided with an upper reinforcing roll 730 and a lower reinforcing roll 731 that are supported by contacting the upper intermediate roll 720 and the lower intermediate roll 721, respectively.
  • a bearing that shifts in the axial direction of the roll together with the upper work roll 710 and receives the load from the roll is on the drive side. It is provided on both the operation side and the operation side, and these bearings are supported by the upper working roll bearing box 712.
  • the lower work roll 711 is also provided with bearings (not shown) at the axial ends on both the drive side and the operation side, and these bearings are supported by the lower work roll bearing box 713. ..
  • the upper work roll 710 is configured to be shiftable in the roll axial direction by the shift cylinder 715 as shown in FIG. 3 via the upper work roll bearing box 712 on the operation side.
  • the lower work roll 711 is also configured to be shiftable in the roll axis direction by the shift cylinder 716 as shown in FIG. 3 via the lower work roll bearing box 713 on the operation side.
  • the upper intermediate roll 720 is provided with bearings 790 (see FIG. 5) at its axial ends on both the drive side and the operation side, and these bearings 790 are provided by the upper intermediate roll bearing boxes 722A and 722, respectively. I support it.
  • the lower intermediate roll 721 also has bearings (not shown) at the ends in the axial direction on both the drive side and the operation side, and these bearings are supported by the lower intermediate roll bearing boxes 723A and 723, respectively. ..
  • the upper intermediate roll 720 is configured to be shiftable in the roll axial direction by the shift cylinder 725 as shown in FIG. 3 via the upper intermediate roll bearing box 722A on the drive side.
  • the lower intermediate roll 721 is also configured to be shiftable in the roll axial direction by the shift cylinder 726 as shown in FIG. 3 via the lower intermediate roll bearing box 723A on the drive side.
  • the entry-side fixing member 702 is fixed to the entrance-side housing 700 of the rolled material 5, and on the exit side of the rolled material 5, the exit-side housing is opposed to the entry-side fixing member 702.
  • the exit side fixing member 703 is fixed to 700.
  • the upper work roll bending cylinder 740 and the upper work roll bending cylinder 740 provided in the work roll bending block portion 714 of the entry side fixing member 702 are on both the operation side and the drive side.
  • the upper work roll bearing box 712 is supported by the upper work roll bending cylinder 742 provided in the intermediate roll bending block portion 727 and the upper work roll bending cylinders 741 and 743 provided in the output side fixing member 703. By appropriately driving these cylinders, a bending force is applied to the bearing of the upper work roll 710 in the vertical direction to bend the upper work roll 710.
  • both the operation side and the drive side are provided on the lower work roll bending cylinders 744 and 746 provided on the entry side fixing member 702 and on the exit side fixing member 703.
  • the lower work roll bending cylinders 745 and 747 support the lower work roll bearing box 713, and by appropriately driving these cylinders, a bending force is applied to the bearing of the lower work roll 711 in the vertical direction.
  • the lower work roll 711 can be bent.
  • the upper intermediate roll 720 has an upper intermediate roll bending cylinder 750 and an outer intermediate roll bending cylinder 750 provided on the upper intermediate roll bending block portion 727 of the entry side fixing member 702 on both the operation side and the drive side.
  • the upper intermediate roll bearing boxes 722 and 722A are supported by the upper intermediate roll bending cylinder 751 provided in the block portion 727, and by appropriately driving these cylinders, a bending force is applied to the bearing 790 in the vertical direction.
  • the upper middle roll 720 can be bent.
  • the upper intermediate roll bending block portion 727 is provided with upper work roll bending cylinders 742 and 743 on the entry side and the exit side so that the upper work roll 710 can be bent by appropriately driving these cylinders. It has become.
  • the lower intermediate roll 721 also has the lower intermediate roll bending cylinder 752 and the lower intermediate roll bending of the exit side fixing member 703 provided on the lower intermediate roll bending block portion 728 of the entry side fixing member 702 on both the operation side and the drive side.
  • the lower intermediate roll bearing boxes 723 and 723A are supported by the lower intermediate roll bending cylinder 753 provided in the block portion 728, and by appropriately driving these cylinders, a bending force is applied to the bearing 790 in the vertical direction.
  • the lower intermediate roll 721 can be bent.
  • the lower intermediate roll bending block portion 728 is provided with lower work roll bending cylinders 746 and 747 on the entry side and the exit side so that the lower work roll 711 can be bent by appropriately driving these cylinders. It has become.
  • the upper work roll bending cylinders 740 and 741 apply a bending force to the bearing of the upper work roll 710 in contact with the rolled material 5 in the vertical direction to the increase side (anti-roll material side) to apply the bending force to the upper work roll 710.
  • the upper work roll bending cylinders 742 and 743 apply a bending force on the vertical decree side (rolled material side direction) opposite to the upper work roll bending cylinders 740 and 741 to the bearing to bend the upper work roll 710. (Fifth cylinder).
  • the lower work roll bending cylinders 744 and 745 are arranged so as to apply a bending force to the bearing of the lower work roll 711 in contact with the rolled material 5 on the vertical oil lease side to bend the lower work roll 711 (). 1st cylinder). Further, the lower work roll bending cylinders 746 and 747 are arranged so as to apply a bending force on the decrease side in the direction opposite to the lower work roll bending cylinders 744 and 745 to the bearing to bend the lower work roll 711 (fifth). Cylinder).
  • the upper intermediate roll bending cylinders 750 and 751 are arranged so as to apply a bending force to the bearing 790 of the upper intermediate roll 720 on the vertically licensed side to bend the roll (first cylinder).
  • the lower intermediate roll bending cylinders 752 and 753 are arranged so as to apply a bending force to the bearing 790 of the lower intermediate roll 721 on the vertically licensed side to bend the roll (first cylinder).
  • the upper working roll bearing box 712 is placed on the entry side fixing member 702 on the entry side of the rolled material 5 via a liner (not shown).
  • An upper working roll bearing box backing cylinder 760 is provided on the working roll 710 so as to apply a force in the horizontal direction, specifically, a pressing force in the rolling direction (second cylinder).
  • the entry side fixing member 702 is provided with a lower working roll bearing box removing cylinder 762 so as to apply a pressing force to the lower working roll 711 in the rolling direction via the liner of the lower working roll bearing box 713. Yes (second cylinder).
  • a desired force can be applied to the work roll or the like in a direction orthogonal to the roll axis direction.
  • the upper intermediate roll bearing boxes 722A and 722 are placed on the outer side fixing member 703 on the outer side of the rolled material 5 via the liners.
  • An upper intermediate roll bearing box backing cylinder 771 is provided on the intermediate roll 720 so as to apply a force in the horizontal direction, that is, a pressing force on the side opposite to the rolling direction (second cylinder).
  • the lower intermediate roll bearing box is attached to the output side fixing member 703 so as to apply a pressing force to the lower intermediate roll 721 via the liners of the lower intermediate roll bearing boxes 723A and 723 in the direction opposite to the rolling direction.
  • a taking cylinder 773 is provided (second cylinder).
  • bearings are provided at the axial ends of the upper reinforcing roll 730 on both the drive side and the operation side, and these bearings are supported by the upper reinforcing roll bearing box 732.
  • the lower reinforcing roll 731 is also provided with bearings (not shown) at the axial ends on both the driving side and the operating side, and these bearings are supported by the lower reinforcing roll bearing box 733. ..
  • the housing 700 on the entry side is provided with an upper reinforcing roll bearing box removing cylinder 780 so as to apply a horizontal force to the upper reinforcing roll 730 via the upper reinforcing roll bearing box 732.
  • the housing 700 on the entry side is provided with a lower reinforcing roll bearing box take-off cylinder 782 so as to apply a horizontal force to the lower reinforcing roll 731 via the lower reinforcing roll bearing box 733.
  • the hydraulic system includes the above-mentioned bending cylinders, rattling cylinders, shift cylinders, and reduction cylinders (not shown) that apply a reduction force for rolling the rolled material 5 to the upper work roll 710 and the lower work roll 711. It is connected to a hydraulic cylinder, and this hydraulic device is connected to the control device 80.
  • the control device 80 controls the operation of the hydraulic device and drives and controls each of the above-mentioned bending cylinders and the like by supplying and discharging pressure oil.
  • the upper work roll 710, the lower work roll 711, and the lower intermediate roll 721 can also have the same configuration as the upper intermediate roll 720. Since the detailed configuration thereof is substantially the same as that of the upper intermediate roll 720, the description thereof will be omitted.
  • the present invention is preferably applied to the upper intermediate roll 720 or the lower intermediate roll 721 as shown in FIG.
  • two upper intermediate roll bending cylinders 750 are provided in the axial direction of the roll on the entry side of the rolled material 5 on each of the drive side and the operation side of the upper intermediate roll 720.
  • one upper intermediate roll bending cylinder 751 is provided on the outlet side of the rolled material 5.
  • the upper intermediate roll bending cylinder 751 provided on the outlet side of the rolled material 5 is located between the two upper intermediate roll bending cylinders 750 provided on the opposite entrance side when viewed from the rolling direction. Arranged to do.
  • the upper intermediate roll bending cylinder 750 on the outer side in the axial direction on both the drive side and the operation side is provided by the shift cylinder 725 via the shift mechanism 725A.
  • the center of the bearing 790 is arranged outside the shift range when the upper intermediate roll 720 is shifted in the axial direction.
  • one upper intermediate roll bearing box backing cylinder 771 arranged on the outlet side of the rolled material 5 is provided on the same outlet side when viewed from the rolling direction. It is arranged on both sides of the bending cylinder 751 in the axial direction.
  • the working positions of the outputs of the three upper intermediate roll bending cylinders 750 and 751 and the working positions of the outputs of the two upper intermediate roll bearing box take-off cylinders 771 determine the axial length of the bearing 790, respectively.
  • the intermediate position of the two upper intermediate roll bending cylinders 750 on the entry side and the intermediate position of the take-off cylinder 771 of the two upper intermediate roll bearing boxes on the exit side are the same or close to each other. ..
  • the axial position of the upper intermediate roll bending cylinder 751 on the exit side is the middle of the axial positions of the two upper intermediate roll bending cylinders 750 on the entry side, that is, the removal cylinder 771 of the two upper intermediate roll bearing boxes. It is more desirable to be located in the middle.
  • the upper work roll bending cylinder 742 arranged on the entry side of the rolled material 5 has two shafts of the upper intermediate roll bending cylinder 750 provided in the axial direction on both the drive side and the operation side. It is provided at a position between the directions.
  • the upper work roll bending cylinder 743 arranged on the outlet side of the rolled material 5 is provided at a position inside the upper intermediate roll bending cylinder 751 in the axial direction on both the drive side and the operation side. ..
  • the difference between the total output of the two first cylinders and the output of the first cylinder provided on the opposite side is configured to be within a predetermined range.
  • the resultant force of the roll bending cylinder acts on the roll axis.
  • any one or two of the two upper intermediate roll bending cylinders 750 arranged on the entry side and the first cylinder provided on the opposite side are driven. It is configured as follows.
  • the shift amount of the upper intermediate rolls 720 i.e., (the plus shift amount of the drive direction) the shift amount of the axial center L S of the bearing 790 to.
  • the total output of the driven cylinders on the entry side and the exit side acts near the intersection of the line connecting the driven cylinders and the roll axis.
  • the section is located within LB / 4 axially outward from the intersection of the straight line connecting the upper intermediate roll bending cylinder 750 on the inner side in the axial direction and the upper intermediate roll bending cylinder 751 on the exit side and the roll axis. There is a boundary between A and section B.
  • the upper intermediate roll bending cylinder 750 on the entry side On the operation side, of the upper intermediate roll bending cylinder 750 on the entry side, the upper intermediate roll bending cylinder 750 on the inner side in the axial direction and the upper intermediate roll bending cylinder 751 on the exit side are driven without driving the cylinder on the outer side in the axial direction. To do.
  • the upper intermediate roll bending cylinders 750 on the entry side On the operation side, of the upper intermediate roll bending cylinders 750 on the entry side, the upper intermediate roll bending cylinder 750 on the outer side in the axial direction and the upper intermediate roll bending cylinder 751 on the exit side are driven without driving the inner cylinder in the axial direction. To do.
  • the total output of the upper intermediate roll bending cylinder 750 on the inlet side is the same as the output of the upper intermediate roll bending cylinder on the outlet side on either the drive side or the operation side.
  • the upper and middle roll bending cylinders 751 on the exit side are driven in the same manner as in the cases A and C.
  • the output of the upper intermediate roll bending cylinders 750 and 751 and the output of the upper intermediate roll bearing box removal cylinder 771 have been described in three cases of ON, 1 / 2ON, and OFF.
  • the output of the bending cylinders 750 and 751 and the output of each upper and middle roll bearing box take-off cylinder 771 can be adjusted more finely and separately so that the bending force is applied more accurately to the axial center of the bearing 790. it can.
  • an example of different output control will be described.
  • the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by ⁇ 1 is the output outside the axial direction
  • the output obtained by multiplying the total output multiplied by ⁇ 2 is the output inside the axial direction.
  • ⁇ 1 and ⁇ 2 are adjusted so that the total of ⁇ 1 and ⁇ 2 is 1 and the acting position of the total output is substantially at the center of the bearing, and the upper and middle roll bending cylinders 751 are driven.
  • the output required for the upper intermediate roll bearing box removing cylinder 771 on the outer side in the axial direction is multiplied by a predetermined coefficient ⁇ 1, and the removing cylinder 771 for the upper intermediate roll bearing box on the inner side in the axial direction is required. It is driven by an output obtained by multiplying the output to be produced by a predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted so that the acting position of the total output is substantially centered on the bearing.
  • only the upper intermediate roll bearing box on the outer side in the axial direction is driven by the take-off cylinder 771.
  • the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by ⁇ 1 is the output outside the axial direction
  • the output obtained by multiplying the total output multiplied by ⁇ 2 is the output inside the axial direction.
  • ⁇ 1 and ⁇ 2 are adjusted so that the total of ⁇ 1 and ⁇ 2 is 1 and the acting position of the total output is substantially at the center of the bearing, and the upper and middle roll bending cylinders 751 are driven.
  • the output required for the upper intermediate roll bearing box removing cylinder 771 on the outer side in the axial direction is multiplied by a predetermined coefficient ⁇ 1, and the removing cylinder 771 for the upper intermediate roll bearing box on the inner side in the axial direction is required. It is driven by an output obtained by multiplying the output to be produced by a predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted so that the acting position of the total output is substantially centered on the bearing.
  • only the upper intermediate roll bearing box on the inner side in the axial direction is driven by the take-off cylinder 771.
  • the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by ⁇ 1 is the output outside the axial direction
  • the output obtained by multiplying the total output multiplied by ⁇ 2 is the output inside the axial direction.
  • ⁇ 1 and ⁇ 2 are adjusted so that the total of ⁇ 1 and ⁇ 2 is 1 and the acting position of the total output is substantially at the center of the bearing, and the upper and middle roll bending cylinders 751 are driven.
  • the output required for the upper intermediate roll bearing box removing cylinder 771 on the outer side in the axial direction is multiplied by a predetermined coefficient ⁇ 1, and the removing cylinder 771 for the upper intermediate roll bearing box on the inner side in the axial direction is required. It is driven by an output obtained by multiplying the output to be produced by a predetermined coefficient ⁇ 2.
  • the total of ⁇ 1 and ⁇ 2 is 1, and ⁇ 1 and ⁇ 2 are adjusted so that the acting position of the total output is substantially centered on the bearing.
  • ⁇ 1 and ⁇ 2 in each region do not have to be the same, and the total of the outputs of the two upper intermediate roll bending cylinders 750 and the output of the upper intermediate roll bending cylinder 751 acts in each region. However, the values may be appropriately different so as to substantially coincide with the center position of the bearing 790.
  • the values of ⁇ 1 and ⁇ 2 in each region do not have to be the same, and in each region, the action position of the output of the two upper intermediate roll bearing box take-off cylinders 771 is the center position of the bearing 790.
  • the values can be different as appropriate so as to be substantially the same.
  • the rolling mill according to the first embodiment of the present invention described above applies a bending force in the vertical direction to the roll, a bearing that shifts in the axial direction of the roll together with the roll and receives a load from the roll, and a bearing that receives a load from the roll.
  • It comprises three or more first cylinders that give and bend the roll, and includes bearings and first cylinders on both the drive side and the operation side.
  • two first cylinders were provided on the inlet or outlet side of the rolled material 5 in the axial direction of the roll, and two first cylinders were provided on the outlet side or the inlet side of the rolled material 5.
  • One first cylinder is provided on the side opposite to the side, and the first cylinder on the opposite side is located between the two first cylinders when viewed from the rolling direction.
  • the first cylinder to be driven can be appropriately changed according to the shift position of the roll. Even if the structure is simpler than that of a conventional rolling mill, the bending resultant force can be applied to the vicinity of the central portion in the longitudinal direction of the bearing. Therefore, even with a simple structure, the eccentric load on the bearing can be reduced.
  • the resultant force of the bending force of the first cylinder is more accurate in the vicinity of the central portion in the longitudinal direction of the bearing. It can be operated reliably, and the eccentric load on the bearing can be reduced more reliably.
  • the entry-side fixing member 702 and the exit-side fixing member 703 which are fixed to at least one of the entry-side and exit-side of the rolled material 5 of the housing 700 and provided with the first cylinder, the entry-side side.
  • either one of the exit sides is further provided with a second cylinder that applies a pressing force to the bearing 790 in the rolling direction or in the direction opposite to the rolling direction, so that when the tip of the rolled material 5 is bitten. It is possible to prevent the bearing and the first cylinder from shifting in the rolling direction. As a result, the effect that the bending action position does not shift can be obtained.
  • either the inlet side or the outlet side is further provided with a second cylinder that applies a pressing force to the bearing in the rolling direction or in the direction opposite to the rolling direction, and the second cylinder rotates the rolling mill from the rolling direction.
  • a second cylinder that applies a pressing force to the bearing in the rolling direction or in the direction opposite to the rolling direction, and the second cylinder rotates the rolling mill from the rolling direction.
  • FIG. 6 shows a case where only the upper intermediate roll bearing box on the inner side in the drive side in the axial direction drives only the take-off cylinder 771, and the pressing force of the second cylinder acts on the vicinity of the central portion in the longitudinal direction of the bearing.
  • FIG. 7 shows a case where only the upper intermediate roll bearing box on the outer side in the drive side is driven by the take-off cylinder 771, and the pressing force of the second cylinder acts at a position away from the vicinity of the central portion in the longitudinal direction of the bearing. Shows the case.
  • Fg1 becomes a large value due to the balance of moments.
  • This requires a larger second cylinder, which makes it difficult to structurally accommodate the larger cylinder in the upper intermediate roll bending block portion 727.
  • FIG. 6 by applying the pressing force of the second cylinder to the vicinity of the central portion in the longitudinal direction of the bearing, the required output of the second cylinder is suppressed, the size of the cylinder is suppressed, and the upper intermediate roll bending is performed. It can be stored in the block portion 727.
  • a control device 80 for driving the first cylinder is further provided, and the control device 80 has an X at the intersection of the straight line connecting the outer first cylinder and the first cylinder provided on the opposite side and the roll axis, and the inner side. Assuming that the intersection of the straight line connecting the first cylinder and the first cylinder provided on the opposite side of the first cylinder and the roll axis is Y, when the center of the bearing is arranged outside X or inside Y, and When the roll is bent, it is configured to drive one of the two first cylinders and the first cylinder provided on the opposite side, so that the bending resultant force is generated by two first cylinders per bearing. It is possible to act more accurately near the central portion in the longitudinal direction of the bearing, and it is possible to more reliably suppress the application of an eccentric load to the bearing.
  • a control device 80 for driving the first cylinder is further provided, and the control device 80 has a difference between the total output of the two first cylinders and the output of the first cylinder provided on the opposite side at the time of bending the roll.
  • the upper intermediate roll 720 and the lower intermediate roll 721 generally have a large shift amount. Therefore, the upper work roll 710 and the lower work roll 711 that come into contact with the rolled material 5, and the upper intermediate roll 720 and the lower intermediate roll 721 that come into contact with the upper work roll 710 and the lower work roll 711 are provided, and the rolls are on the upper side. With the intermediate roll 720 and the lower intermediate roll 721, even when the shift amount is large in a simple structure, the bending resultant force can be applied to the vicinity of the central portion in the longitudinal direction of the bearing.
  • the rolled material 5 is fixed to at least one of the inlet side and the outlet side of the rolled material 5 of the housing 700, and the inlet side fixing member 702 and the outlet side fixing member 703 provided with the first cylinder and the rolled material 5.
  • a fifth cylinder for bending the upper work roll 710 and the lower work roll 711 by applying a bending force in the direction opposite to that of the first cylinder to the bearings of the upper work roll 710 and the lower work roll 711 in contact with the first cylinder.
  • the fifth cylinder can also be provided on the same member as the first cylinder, and space can be saved.
  • Example 2 The rolling mill of Example 2 of the present invention will be described with reference to FIG.
  • the same reference numerals are shown in the same configurations as in the first embodiment, and the description thereof will be omitted. The same applies to the following examples.
  • the upper intermediate roll bending cylinder 750A (first cylinder) is placed on the entry side of the rolled material 5 in the axial direction of the roll.
  • One is provided, and two upper intermediate roll bending cylinders 751A (first cylinders) are provided on the outlet side of the rolled material 5.
  • the upper intermediate roll bending cylinder 750A provided on the entry side of the rolled material 5 is located between the two upper intermediate roll bending cylinders 751A provided on the opposite exit side when viewed from the rolling direction. Arranged to do.
  • the upper intermediate roll bearing box take-off cylinder 771A arranged on the outlet side of the rolled material 5 is provided with two upper intermediate rolls on the same outlet side when viewed from the rolling direction. It is arranged between the bending cylinders 751A in the axial direction.
  • the upper intermediate roll bending cylinder 750A provided on the inlet side and the upper intermediate roll bearing box take-off cylinder 771A on the outlet side have the same axial position.
  • the upper intermediate roll bending cylinder 750A on the entry side is driven, and of the upper intermediate roll bending cylinder 751A on the exit side, the cylinder on the outer side in the axial direction is not driven, but the cylinder on the inner side in the axial direction is driven.
  • both the drive side and the operation side drive the upper middle roll bending cylinder 750A on the entry side in the same manner as in sections A and C, and the upper middle roll bending cylinder on the exit side.
  • Any output of 751A is halved so that its sum is the same as the output of the upper and middle roll bending cylinders on the entry side.
  • the upper intermediate roll bearing box removal cylinder 771A is driven in any of the sections A, B, and C in Table 2.
  • a second cylinder that applies a pressing force to the bearing 790 in the rolling direction or in the direction opposite to the rolling direction is further provided on either the entry side or the exit side.
  • the second cylinder is arranged between the axial directions of the first cylinder, so that the second cylinder is located approximately in the middle of Ls, thereby pushing the second cylinder. It becomes easier to act near the central part of the bearing that shifts the pressure in the longitudinal direction, the output required for the second cylinder is suppressed, the size of the cylinder is suppressed, and it can be stored in the upper middle roll bending block part 727. can do.
  • the bearing and the first cylinder can be prevented from being displaced in the rolling direction when the rolled material is bitten, so that the bending accuracy can be maintained in a higher state.
  • the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 751A by ⁇ 1 is defined as the output on the outer side in the axial direction
  • the output obtained by multiplying the total output by ⁇ 2 is defined as the output on the inner side in the axial direction. It is also possible to adjust ⁇ 1 and ⁇ 2 so that the total of ⁇ 2 is 1 and the acting position of the total output is substantially at the center of the bearing to drive the upper intermediate roll bending cylinder 750A.
  • the drive side can be in the form shown on the drive side in FIG. 5, and the operation side can be in the form shown on the operation side in FIG.
  • the drive side may be in the form shown on the drive side in FIG. 8
  • the operation side may be in the form shown on the operation side in FIG.
  • Example 3 The rolling mill of Example 3 of the present invention will be described with reference to FIGS. 9 and 3.
  • a bending force is further applied in the vertical direction with respect to the bearing 790 between the two upper intermediate roll bending cylinders 750 on the side where the rolled material 5 is inserted. It is provided with an upper intermediate roll bending cylinder 750B (third cylinder) that is given to bend the roll.
  • the upper intermediate roll bending cylinder 750B is arranged so as to apply a bending force to the increase side, similarly to the upper intermediate roll bending cylinder 750.
  • the shift amount of the bearing 790 and L S divide the L S section A, B, C, and D.
  • Table 3 shows the relationship between the bearing center position and the driving state of each cylinder.
  • the intersection position of the line connecting e1 and d1 and the roll axis is the boundary between section D and section C, and the intersection position of the line connecting e3 and d1 and the roll axis is the boundary between section B and section A.
  • the output is obtained by multiplying the bending force Pbe on the entry side, which requires the output of the upper and middle roll bending cylinders 750, e1 on the outer side in the axial direction, by a predetermined coefficient ⁇ 1.
  • the upper intermediate roll bending cylinders 750B and e2 are driven by the output obtained by multiplying the input side bending force Pbe which requires the output by a predetermined coefficient ⁇ 2, and the upper intermediate roll bending cylinders 751 and d1 are driven.
  • the output obtained by multiplying the bending force Pbe on the input side which requires the output of the upper intermediate roll bending cylinders 750B and e2, by a predetermined coefficient ⁇ 2, and the inner side in the axial direction.
  • the upper intermediate roll bending cylinders 750 and e3 are driven by the output obtained by multiplying the bending force Pbe on the input side, which requires the output, by a predetermined coefficient ⁇ 3, and the upper intermediate roll bending cylinders 751 and d1 are driven.
  • the resultant force of the bending force Pbe on the entry side and the bending force Pbd on the exit side is adjusted to be the bending force required for the roll. Moreover, the resultant force acts near the roll axis.
  • the output of the upper intermediate roll bearing box backing cylinder 771 is required to be the backing pressing force Pg.
  • the output is obtained by multiplying the predetermined coefficient ⁇ 1 and the output of the upper intermediate roll bearing box on the inner side in the axial direction requires the output of the removing cylinder 771 and g2, but the output obtained by multiplying the pressing force Pg by the predetermined coefficient ⁇ 2. Drive.
  • the values of ⁇ 1, ⁇ 2, and ⁇ 3 in each region do not have to be the same as those of ⁇ 1 and ⁇ 2, and the outputs of the four upper and intermediate roll bending cylinders 750, 750B, and 751 in each region.
  • the working position and the working position of the output of the two upper intermediate roll bearing box take-off cylinders 771 are set to different values as appropriate so as to substantially coincide with the center position of the bearing 790.
  • ⁇ 3 can be appropriately determined by setting.
  • the rolling mill of Example 3 of the present invention also has almost the same effect as the rolling mill of Example 1 described above.
  • the range in which the bending force can be applied is in the axial direction. Therefore, the shift amount can be increased, and when the shift amount is small, the load can be applied more accurately to the center position in the longitudinal direction of the bearing.
  • the outputs of the upper intermediate roll bending cylinders 750, 750B and 751 act as a roll bending force on the upper intermediate roll bearing box brim portion 822AB of FIG.
  • the bearing also shifts with the bearing box.
  • the upper intermediate roll bearing box brim 822AB is required at the bending cylinder driven at that shift position, but the bending cylinder to be used is selected according to the shift position. By doing so, even when the shift amount is large, there is an effect that a long LCB is not required and the bearing box is not complicated.
  • a long L CB is required, there arises a problem that the bearing box becomes long in the axial direction and becomes large and has a complicated structure, but this can be avoided.
  • the case where one upper intermediate roll bending cylinder 750B is provided has been described, but two or more can be provided.
  • the positions in the axial direction are not particularly limited after the second one, and one or more of the upper and middle roll bending cylinders 750 on the outer side in the axial direction may be arranged on the outer side in the axial direction, or the upper middle roll bending cylinder 750 on the inner side in the axial direction One or more can be arranged more axially inward.
  • the entry side and the exit side of FIG. 9 are reversed, and the upper intermediate roll bending cylinder 750 and the upper intermediate roll bending cylinder 750B are arranged on the exit side. be able to. Also in this case, the number of upper intermediate roll bending cylinders 750B is not particularly limited, and one or more can be provided.
  • one or more cylinders having the same specifications as the upper intermediate roll bending cylinder 750B can be added to the inlet side and the outlet side.
  • Example 4 The rolling mill of Example 4 of the present invention will be described with reference to FIGS. 10 and 4.
  • an upper intermediate roll bending cylinder 751C (fourth cylinder) is further provided at a position on the outer side in the axial direction on the drive side and on the inner side in the axial direction on the operation side.
  • the upper intermediate roll bending cylinder 751C is arranged so as to apply a bending force to the increase side, similarly to the upper intermediate roll bending cylinder 750.
  • the shift amount of the bearing 790 and L S divide the L S section A, the B.
  • Table 4 shows the relationship between the bearing center position and the driving state of each cylinder. The intersection position of the line connecting e1 and d2 and the roll axis is the boundary between section B and section A.
  • the bending force on the output side that requires the outputs of the upper and middle roll bending cylinders 750 and e1 on the outer side in the axial direction and the upper and middle roll bending cylinders 751C and d1. It is driven by the output obtained by multiplying Pbd by a predetermined coefficient ⁇ d1 and the output obtained by multiplying the bending force Pbd on the output side, which requires the output of the upper intermediate roll bending cylinders 751 and d2, by a predetermined coefficient ⁇ d2.
  • the output of the backlash cylinder 771 and g1 on the outer upper intermediate roll bearing box in the axial direction is required in any section, and the output is obtained by multiplying the backlash pressing force Pg by a predetermined coefficient ⁇ 1.
  • the upper intermediate roll bearing box on the inner side in the axial direction requires the output of the removing cylinder 771 and g2, but is driven by the output obtained by multiplying the removing pressing force Pg by a predetermined coefficient ⁇ 2.
  • the output obtained by multiplying the bending force Pbe on the input side, which requires the output of the upper intermediate roll bending cylinders 750 and e1, by a predetermined coefficient ⁇ e1, and the upper intermediate The output obtained by multiplying the bending force Pbe on the input side, which requires the output of the roll bending cylinders 750 and e2, by a predetermined coefficient ⁇ e2, and the upper intermediate roll bending cylinders 751 and d2 are driven.
  • the coefficients ⁇ e1, ⁇ e2, ⁇ d1, and ⁇ d2 in each section do not have to be the same value, and the four upper and intermediate roll bending cylinders 750, e1,750, e2, 751C, d1, 751 in each section. , D2 have different values so that the action position of the output is substantially the same as the center position of the bearing 790.
  • the coefficients ⁇ 1 and ⁇ 2 in each section of the upper intermediate roll bearing box take-off cylinders 771, g1 and 771, g2 do not have to be the same value, and the upper intermediate roll bearing box is removed in each section.
  • the working positions of the outputs of the take cylinders 771, g1 and 771 and g2 are set to different values as appropriate so as to substantially coincide with the center position of the bearing 790 or to be as close to the center position of the bearing 790 as possible.
  • the rolling mill of Example 4 of the present invention also has almost the same effect as the rolling mill of Example 1 described above.
  • one fourth cylinder is provided at a position on the outer side in the axial direction from one first cylinder provided on the opposite side, and a bending force is further applied in the vertical direction to the bearing 790 to bend the roll. Further prepared above, when the rolling mill is viewed from the rolling direction, one of the two first cylinders on the entry side is arranged between the first cylinder and the fourth cylinder provided on the opposite side. However, the range in which the bending force can be applied can be expanded in the axial direction, and the shift amount can be increased.
  • the case where one upper intermediate roll bending cylinder 751C is provided has been described, but two or more can be provided.
  • the positions in the axial direction from the second onward are not particularly limited, and one or more may be arranged between the upper intermediate roll bending cylinder 751C and the upper intermediate roll bending cylinder 751, or the shaft may be arranged from the upper intermediate roll bending cylinder 751.
  • One or more can be arranged inside the direction.
  • the upper intermediate roll bending cylinder 750 and the upper intermediate roll bending cylinder 751C can be arranged on the entrance side by reversing the entry side and the exit side in FIG. Also in this case, the number of upper intermediate roll bending cylinders 751C is not particularly limited, and one or more can be provided.
  • the upper intermediate roll bending cylinder 751C can be added to the entry side and the exit side.
  • Example 5 The rolling mill of Example 5 of the present invention will be described with reference to FIG.
  • the rolling mill of this embodiment shown in FIG. 11 has an upper working roll bending cylinder 742,743 and a lower working roll bending cylinder 746,747 that apply a pressing force to the decree side from the rolling mill of the first embodiment shown in FIG. It is omitted, and other configurations / operations are substantially the same as those of the rolling mill of the first embodiment described above, and details are omitted.
  • the rolling mill of Example 5 of the present invention also has almost the same effect as the rolling mill of Example 1 described above.
  • the bending cylinder on the decrease side can be omitted as in the present embodiment. Further, in the second embodiment, a bending cylinder on the decree side can be added.
  • the present invention is not limited to the above examples, and includes various modifications.
  • the above-mentioned examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations.
  • the description around the intermediate roll has been described, it can be effectively used around the work roll to be shifted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Rolls And Other Rotary Bodies (AREA)
PCT/JP2019/041943 2019-10-25 2019-10-25 圧延機 Ceased WO2021079498A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2019/041943 WO2021079498A1 (ja) 2019-10-25 2019-10-25 圧延機
EP19949862.7A EP3981522B1 (en) 2019-10-25 2019-10-25 Rolling mill
CN201980097298.3A CN113950383B (zh) 2019-10-25 2019-10-25 轧机
JP2021553263A JP7100416B2 (ja) 2019-10-25 2019-10-25 圧延機

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6355369B2 (https=) 1983-06-13 1988-11-02 Hitachi Ltd
JPH0270311A (ja) * 1988-09-02 1990-03-09 Hitachi Ltd 圧延機のロールシフト装置
JP2000015310A (ja) * 1998-07-07 2000-01-18 Danieli United A Division Of Danieli Corp 圧延機のためのロ―ルの交差、オフセット、曲げ及び移動システム
WO2011122069A1 (ja) * 2010-03-31 2011-10-06 新日本製鐵株式会社 金属板材の圧延機および圧延方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3122128A1 (de) * 1981-06-04 1982-12-23 SMS Schloemann-Siemag AG, 4000 Düsseldorf Walzgeruest
BR8300010A (pt) * 1982-01-06 1983-08-30 Hitachi Ltd Laminador
JPH0753285B2 (ja) * 1984-03-30 1995-06-07 株式会社日立製作所 作業ロール軸受箱を備えた圧延機
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
FR2786415B1 (fr) * 1998-11-30 2001-02-09 Kvaerner Metals Clecim Laminoir equipe de moyens de cambrage des cylindres de travail
DE60023188T2 (de) * 2000-03-01 2006-07-13 Hitachi, Ltd. Walzwerk und tandemwalzwerksanlage zum warmfertigwalzen
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
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6355369B2 (https=) 1983-06-13 1988-11-02 Hitachi Ltd
JPH0270311A (ja) * 1988-09-02 1990-03-09 Hitachi Ltd 圧延機のロールシフト装置
JP2000015310A (ja) * 1998-07-07 2000-01-18 Danieli United A Division Of Danieli Corp 圧延機のためのロ―ルの交差、オフセット、曲げ及び移動システム
WO2011122069A1 (ja) * 2010-03-31 2011-10-06 新日本製鐵株式会社 金属板材の圧延機および圧延方法

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JPWO2021079498A1 (https=) 2021-04-29
EP3981522A1 (en) 2022-04-13
EP3981522A4 (en) 2022-06-29
EP3981522B1 (en) 2024-05-01
CN113950383A (zh) 2022-01-18
JP7100416B2 (ja) 2022-07-13

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