WO2021079498A1 - Rolling mill - Google Patents

Abstract

A rolling mill provided with: a roll which shifts in an axial direction; a bearing which shifts together with the roll in the axial direction of the roll, and which bears load from the roll; and three or more first cylinders for bending the roll by applying a bending force to the bearing in a vertical direction. The bearing and the first cylinders are provided on both a drive side and an operating side of the roll. Two of the first cylinders are provided in the axial direction of the roll on the entry side or exit side of a roll material 5. One of the first cylinders is provided on one of the exit side or entry side of the roll material 5 opposite to the side on which the two first cylinders are provided. When viewed from a rolling direction, the first cylinder on the opposite side is positioned between the two first cylinders.

Description

Rolling machine

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.

Special Publication No. 63-055369

It 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.

In such a rolling mill, if the position of the bearing and the bending cylinder changes depending on the position of the rolling roll to be shifted and an eccentric load is applied to the bearing, the life of the bearing may be shortened, which is particularly remarkable in a roll having a large shift amount. It becomes.

As an example of a technique for suppressing an eccentric load acting on a bearing to prolong the life of the bearing, there is a technique described in Patent Document 1. In Patent Document 1, 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. For example, 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. For example, a roll that shifts in the axial direction and a roll that shifts in the axial direction of the roll together with the roll to apply a load from the roll. 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.

According to the present invention, 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.

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. It is a figure which shows a part of the cross section of BB' in 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. 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 outer side in the drive side in the axial direction drives only the take-off cylinder. It is a top view explaining the details of the intermediate roll part in the rolling mill of Example 2 of this invention. It is a top view explaining the details of the intermediate roll part in the rolling mill of Example 3 of this invention. It is a top view explaining the details of the intermediate roll part in the rolling mill of Example 4 of this invention. It is a top view explaining the details of the intermediate roll part in the rolling mill of Example 5 of this invention.

An embodiment of the rolling mill of the present invention will be described below with reference to the drawings.

<Example 1>
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, and FIG. FIG. 4 is a view showing a part of the cross section taken along the line BB'of FIG. 2, and FIG. 5 is a plan view for explaining the details of the intermediate roll portion.

First, the outline of the rolling equipment equipped with the rolling mill of this embodiment will be described with reference to FIG.

As shown in FIG. 1, 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.

Next, a part of the outline of the rolling mill of the present invention will be described with reference to FIG. Although the seventh stand 70 shown in FIG. 1 will be described as an example in FIG. 2, 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.

In FIG. 2, 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.

Of these rolls, at the axial end of the upper work roll 710, a bearing (omitted for convenience of illustration) 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. Similarly, 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. ..

In this embodiment, 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. Similarly, 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. ..

Further, 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. Similarly, 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.

Returning to FIG. 2, 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.

In the seventh stand 70, as shown in FIGS. 2 and 4, 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.

Similarly, as shown in FIGS. 2 and 4, 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. Further, 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. Further, 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.

Among these cylinders, 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. Is arranged so as to bend (first cylinder). Further, 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).

Similarly, 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).

As shown in FIGS. 2, 3 and 4, for the purpose of removing rattling, 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). Similarly, 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). As a result, a desired force can be applied to the work roll or the like in a direction orthogonal to the roll axis direction.

Further, as shown in FIGS. 2, 3 and 4, for the purpose of removing rattling, 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). Similarly, 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).

Returning to FIG. 2, bearings (not shown) 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. There is. Similarly, 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. ..

Further, as shown in FIG. 2, 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. Has been done. Similarly, 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.

Next, the configuration related to the upper and middle rolls 720 of each roll will be described with reference to FIG. 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.

As shown in FIG. 5, in this embodiment, 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. Has been done. Further, one upper intermediate roll bending cylinder 751 is provided on the outlet side of the rolled material 5. Of these, 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.

Further, of the two upper intermediate roll bending cylinders 750 provided on the entry side, 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.

Further, in the present embodiment, 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.

In particular, 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. when the _{L B,} L _B / 4 within the axial center of the bearing 790 axially outwardly, and the axial center of the bearing 790 _L B / 4 within axially inward, i.e. in the axial center of the bearing 790 it is arranged to fit in L B _{/ 2,} or, and outputs it is desirable to be controlled.

More preferably, 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. .. In this case, 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.

In this embodiment, 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.

On the other hand, 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. ..

Next, the details of the drive control of the upper intermediate roll bending cylinders 750 and 751 and the upper intermediate roll bearing box backing cylinder 771 of this embodiment will be described with reference to FIGS. 5 and 1. These drive controls are executed by the control device 80 that drives and controls the hydraulic device.

First, when the roll is bent, 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. Preferably, the resultant force of the roll bending cylinder acts on the roll axis. Further, depending on the shift position of the upper intermediate roll 720, 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.

Here, 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.

Bearing center section A of FIG. 5 when the intermediate roll shifts between L _S, B, present in the C. When the bearing center is in section C, on the drive side, of the upper intermediate roll bending cylinders 750 on the entry side, the cylinders on the inner side in the axial direction are not driven, and the upper intermediate roll bending cylinders 750 on the outer side in the axial direction and the outlet side. It drives the upper intermediate roll bending cylinder 751.

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. Axes of L _{B /} 4 within axially outward from the direction center, and L _{B /} 4 within the axial center of the bearing 790 axially inwardly, i.e., bearing 790 position the bearing 790 outputs the sum of the cylinder acts It is arranged to fit into L _{B /} 2 in the direction center.

Therefore, 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.

In addition, a section within _LB / 4 axially inward from the intersection of the straight line connecting the upper intermediate roll bending cylinder 750 on the entry side and the upper intermediate roll bending cylinder 751 on the exit side on the outer side in the axial direction and the roll axis. There is a boundary between B and section C.

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.

When the bearing center is in section A, on the drive side, of the upper intermediate roll bending cylinders 750 on the entry side, the cylinders on the outer side in the axial direction are not driven, and the upper intermediate roll bending cylinders 750 on the inner side in the axial direction and the outlet side. It drives the upper intermediate roll bending cylinder 751.

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.

When the bearing center is in section B, 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. As described above, 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.

Regarding the upper intermediate roll bearing box removal cylinder 771, in section C in Table 1, on the drive side, only the cylinder on the outer side in the axial direction is driven without driving the cylinder on the inner side in the axial direction. On the operation side, the cylinder on the inner side in the axial direction is driven without driving the cylinder on the outer side in the axial direction.

Further, in the section A in Table 1, on the drive side, only the cylinder on the inner side in the axial direction is driven without driving the cylinder on the outer side in the axial direction. On the operation side, the cylinder on the inner side in the axial direction is not driven, but the cylinder on the outer side in the axial direction is driven.

In section B in Table 1, both the drive side and the operation side are driven at 1/2 of the output that requires the output of either of the two cylinders.

In the above example, 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. Hereinafter, an example of different output control will be described.

Hereinafter, only the drive side will be described as an example. The operation side can be dealt with by reversing the positional relationship in the axial direction, and the details thereof will be omitted.

When the bearing center is in section C, the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by α1 is the output outside the axial direction, and the output obtained by multiplying the total output multiplied by α2 is the output inside the axial direction. , Α1 and α2 are adjusted so that the total of α1 and α2 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. Alternatively, α1 = 1 and α2 = 0 to drive the upper intermediate roll bending cylinder 750 and the upper intermediate roll bending cylinder 751 on the outer side in the axial direction.

Further, 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 γ1, 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 γ2. Here, the total of γ1 and γ2 is 1, and γ1 and γ2 are adjusted so that the acting position of the total output is substantially centered on the bearing. Alternatively, only the upper intermediate roll bearing box on the outer side in the axial direction is driven by the take-off cylinder 771.

When the bearing center is in section A, the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by α1 is the output outside the axial direction, and the output obtained by multiplying the total output multiplied by α2 is the output inside the axial direction. , Α1 and α2 are adjusted so that the total of α1 and α2 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. Alternatively, α1 = 0 and α2 = 1 to drive the upper intermediate roll bending cylinder 750 and the upper intermediate roll bending cylinder 751 on the inner side in the axial direction.

Further, 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 γ1, 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 γ2. Here, the total of γ1 and γ2 is 1, and γ1 and γ2 are adjusted so that the acting position of the total output is substantially centered on the bearing. Alternatively, only the upper intermediate roll bearing box on the inner side in the axial direction is driven by the take-off cylinder 771.

When the bearing center is in section B, the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 750 by α1 is the output outside the axial direction, and the output obtained by multiplying the total output multiplied by α2 is the output inside the axial direction. , Α1 and α2 are adjusted so that the total of α1 and α2 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.

Further, 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 γ1, 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 γ2. Here, the total of γ1 and γ2 is 1, and γ1 and γ2 are adjusted so that the acting position of the total output is substantially centered on the bearing.

When it operated the intermediate roll chocks play up the cylinder 771 on the two as shown in Table 1, to fit the the acting turned position to L _{B /} 2 in the axial center of the bearing 790 when the bearing center is in the interval B it can be, but in some cases the the acting dynamic position in the section C and the section a exceeds L _{B /} 2 in the axial center of the bearing 790. In contrast, it is possible to fit A, B, and the acting turned position to L _{B /} 2 in the axial center of the bearing 790 at each section of C by adjusting the γ1 and .gamma.2.

The values of α1 and α2 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.

Further, the values of γ1 and γ2 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.

Next, the effect of this embodiment will be described.

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. Of these, 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.

In this way, by arranging a total of three first cylinders on the entry side and the exit side of the rolled material 5 in a staggered arrangement, 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.

Further, since one or more of the two first cylinders are arranged outside the range in which the center of the bearing shifts, 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.

Further, of 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. Alternatively, 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. That is, since it is possible to suppress the bearing from moving in the rolling direction while the bending force is applied, slippage does not occur at the portion pressed by the first cylinder, and the first cylinder is damaged or the pressed side. Wear can be suppressed and the bending accuracy can be maintained high.

Further, 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. When viewed, by arranging them on both sides in the axial direction of the first cylinder, it becomes easier to apply the pressing force of the second cylinder to the vicinity of the central portion in the longitudinal direction of the bearing, and the bearing and the second cylinder can be more easily engaged when the rolled material is bitten. Since one cylinder can be prevented from shifting in the rolling direction, the bending accuracy can be maintained in a higher state.

The effects produced by the pressing force of the second cylinder acting near the center of the bearing in the longitudinal direction are as follows. 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.

As shown in FIG. 6, the force Fd in the rolling direction acting on the bearing from the roll, the pressing force Fg2 of the second cylinder, the outer reaction force F1 generated in the liner of the upper intermediate roll bearing box 722A and the upper intermediate roll bending block portion 727. Assuming that the inner reaction force is F2, the relationship is Fg2 = Fd + F1 + F2. When either F1 or F2 becomes 0, the liner is not hit, which is not preferable. Here, since Fg2 is generated near the Fd action position, Fg2 can be set to a relatively small value. That is, the pressing force of the second cylinder can be reduced.

On the other hand, 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.

Similarly, the pressing force Fg1 of the second cylinder has a relationship of Fg1 = Fd + F1 + F2. In order to prevent F2 from becoming 0, 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. However, as shown in 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.

Further, 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.

Further, 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. By being configured to be within a predetermined range, it is possible to apply a bending force substantially equal to the entry side and the exit side of the bearing, and the roll can be stably held.

Further, 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.

Further, 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. By further providing 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.

As shown in FIG. 8, in the rolling mill of the present embodiment, contrary to the rolling mill of the first embodiment, 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.

Of these, 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.

Further, in the present embodiment, 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.

In this embodiment, it is desirable that 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.

Next, the details of the drive control of the upper intermediate roll bending cylinders 750A and 751A and the upper intermediate roll bearing box backing cylinder 771A of this embodiment will be described with reference to FIGS. 8 and 2.

To L _{B /} 4 within the located axially inwardly from the intersection of the intermediate roll bending cylinders 750A and axially outer outlet side of the intermediate roll bending cylinder 751A on the inlet side, there is the boundary between zone B and zone C .. When the bearing center is in section C, the drive side drives the upper middle roll bending cylinder 750A on the entry side, and the inner cylinder in the axial direction of the upper middle roll bending cylinder 751A on the exit side is not driven. , Drives the outer cylinder in the axial direction. On the operation side, 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.

To L _{B /} 4 within the located axially outward from the intersection of the intermediate roll bending cylinder 750A and the axial inner outlet side of the intermediate roll bending cylinder 751A on the inlet side, there is the boundary between intervals A and B .. When the bearing center is in section A, the drive side drives the upper middle roll bending cylinder 750A on the entry side, and the outer cylinder in the axial direction of the upper middle roll bending cylinder 751A on the exit side is not driven. , Drives the inner cylinder in the axial direction. On the operation side, the upper intermediate roll bending cylinder 750A on the entry side is driven, and the cylinder on the inner side in the axial direction is not driven, but the cylinder on the outer side in the axial direction is driven.

When the bearing center is in section B, 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.

Other configurations and operations are substantially the same as those of the rolling mill of the first embodiment described above, and details are omitted.

As in the second embodiment of the present invention, 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. By arranging the cylinders between the two first cylinders when the rolling mill is viewed from the rolling direction, almost the same effect as that of the rolling mill of the first embodiment can be obtained.

Bearing center section A shown in FIG. 8 when the intermediate rolls are shifted between the L _S, B, present in the C. When the rolling mill is viewed from the rolling direction, 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. As a result, 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.

Similar to the first embodiment, the output obtained by multiplying the total output of the two upper intermediate roll bending cylinders 751A by α1 is defined as the output on the outer side in the axial direction, and the output obtained by multiplying the total output by α2 is defined as the output on the inner side in the axial direction. It is also possible to adjust α1 and α2 so that the total of α2 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.

Note that 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. On the contrary, the drive side may be in the form shown on the drive side in FIG. 8, and 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.

In the rolling mill of the present embodiment shown in FIG. 9, in the rolling mill of the first embodiment, 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.

Next, the details of the drive control of the upper intermediate roll bending cylinders 750, 750B, 751 and the upper intermediate roll bearing box backing cylinder 771 of this embodiment will be described.

Also in this embodiment, 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.

When the axial center of the bearing exists in the section D, the upper intermediate roll bending cylinders 750 and e1 on the outer side in the axial direction and the upper intermediate roll bending cylinders 751 and d1 are driven.

When the axial center of the bearing exists in the section C, 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 α1. , 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 α2, and the upper intermediate roll bending cylinders 751 and d1 are driven.

When the axial center of the bearing exists in the section B, 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 α2, 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 α3, and the upper intermediate roll bending cylinders 751 and d1 are driven.

When the axial center of the bearing exists in the section A, the upper intermediate roll bending cylinders 750 and e3 on the inner side in the axial direction and the upper intermediate roll bending cylinders 751 and d1 are driven.

Regardless of the region where the axial center of the bearing is present, 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.

Regarding the output of the upper intermediate roll bearing box backing cylinder 771, the output of the upper intermediate roll bearing box backing cylinder 771 and g1 on the outer side in the axial direction is required to be the backing pressing force Pg. The output is obtained by multiplying the predetermined coefficient γ1 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 γ2. Drive.

The values of α1, α2, and α3 in each region do not have to be the same as those of γ1 and γ2, 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. Further, in the section D, it is possible to apply a bending force near the center position in the longitudinal direction of the bearing by using e1 and e2 instead of using only e1 on the entry side, and the output distribution is α1 and α2 in each section. , Α3 can be appropriately determined by setting.

Other configurations and 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 3 of the present invention also has almost the same effect as the rolling mill of Example 1 described above.

Further, by providing a third cylinder between the two first cylinders, which further applies a bending force to the bearing 790 in the vertical direction to bend the roll, 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.

Further, 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 upper intermediate roll chocks collar portion length of 822AB and _{L CB.} When the intermediate roll shifts, the bearing also shifts with the bearing box. In order to apply the roll bending force at the position where the bearing is shifted, 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. When 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.

In this embodiment, the case where one upper intermediate roll bending cylinder 750B is provided has been described, but two or more can be provided. At this time, 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.

Further, as in the relationship between the first embodiment and the second embodiment, 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.

Furthermore, 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.

In the rolling mill of the present embodiment shown in FIG. 10, in the rolling mill of the first embodiment, when viewed from the rolling direction, the two upper intermediate roll bending cylinders 750 on the rolling material 5 exit side and the rolled material 5 entry side 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.

Next, the details of the drive control of the upper intermediate roll bending cylinders 750, 751, 751C and the upper intermediate roll bearing box backing cylinder 771 of this embodiment will be described.

Also in this embodiment, 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.

When the axial center of the bearing 790 exists in the section B, 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 αd1 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 αd2.

For the backlash cylinder, 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 γ1. At the same time, 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 γ2.

When the axial center of the bearing 790 exists in the section A, 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 αe1, 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 αe2, and the upper intermediate roll bending cylinders 751 and d2 are driven.

The coefficients αe1, αe2, αd1, and αd2 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.

Further, the coefficients γ1 and γ2 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.

Other configurations and 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 4 of the present invention also has almost the same effect as the rolling mill of Example 1 described above.

Further, 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.

In this embodiment, the case where one upper intermediate roll bending cylinder 751C is provided has been described, but two or more can be provided. At this time, 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.

Further, 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.

Furthermore, 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.

Also in the third and fourth embodiments, 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.

<Others>
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. Although the description around the intermediate roll has been described, it can be effectively used around the work roll to be shifted.

It is also possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

1 ... Rolling equipment 5 ... Rolled material 10 ... 1st stand (rolling machine)
20 ... 2nd stand (rolling machine)
30 ... 3rd stand (rolling machine)
40 ... 4th stand (rolling machine)
50 ... 5th stand (rolling machine)
60 ... 6th stand (rolling machine)
70 ... 7th stand (rolling machine)
80 ... Control device 700 ... Housing 702 ... Enter side fixing member 703 ... Outer side fixing member 710 ... Upper work roll (roll)
711 ... Lower work roll (roll)
712 ... Upper work roll bearing box 713 ... Lower work roll bearing box 714 ... Work roll bending block portion 715, 716,725, 726 ... Shift cylinder 720 ... Upper intermediate roll (roll)
721 ... Lower middle roll (roll)
722,722A ... Upper intermediate roll bearing box 723,723A ... Lower intermediate roll bearing box 725A ... Shift mechanism 727 ... Upper intermediate roll bending block portion 728 ... Lower intermediate roll bending block portion 730 ... Upper reinforcing roll 731 ... Lower reinforcing roll 732 ... Upper reinforcing roll bearing box 733 ... Lower reinforcing roll bearing box 740, 741 ... Upper working roll bending cylinder (first cylinder)
742,743 ... Upper work roll bending cylinder (fifth cylinder)
744,745 ... Lower work roll bending cylinder (first cylinder)
746,747 ... Lower work roll bending cylinder (fifth cylinder)
750, 750A, 751, 751A ... Upper intermediate roll bending cylinder (first cylinder)
750B ... Upper middle roll bending cylinder (third cylinder)
751C ... Upper middle roll bending cylinder (4th cylinder)
752, 753 ... Lower intermediate roll bending cylinder (first cylinder)
760 ... Upper work roll bearing box rattling cylinder (second cylinder)
762 ... Lower work roll bearing box rattling cylinder (second cylinder)
771, 771A ... Upper intermediate roll bearing box rattling cylinder (second cylinder)
773 ... Lower intermediate roll bearing box rattling cylinder (second cylinder)
780 ... Upper reinforcing roll bearing box rattling cylinder 782 ... Lower reinforcing roll bearing box rattling cylinder 790 ... Bearing 822AB ... Upper intermediate roll bearing box brim

Claims (10)

1. A roll that shifts in the axial direction and
   A bearing that shifts in the axial direction of the roll together with the roll and receives a load from the roll.
   The bearing is provided with three or more first cylinders that apply a bending force in the vertical direction to bend the roll.
   The bearing and the first cylinder are provided on both the driving side and the operating side of the roll.
   Two first cylinders are provided on the entry side or the exit side of the rolled material in the axial direction of the roll, and
   One of the first cylinders is provided on the side opposite to the side on which the two first cylinders are provided on the exit side or the entrance side of the rolled material.
   A rolling mill characterized in that the first cylinder on the opposite side is located between the two first cylinders when viewed from the exit side or the entrance side of the rolled material.
2. In the rolling mill according to claim 1,
   A rolling mill characterized in that one or more of the two first cylinders is arranged outside the range in which the center of the bearing shifts.
3. In the rolling mill according to claim 1 or 2.
   A fixing member fixed to at least one of the entry side and the exit side of the rolled material of the housing of the rolling mill and provided with the first cylinder.
   Among the fixing members, either the entry side or the exit 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. A featured rolling mill.
4. In the rolling mill according to any one of claims 1 to 3.
   A second cylinder that applies a pressing force to the bearing 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 located between the two first cylinders or on both sides of the one cylinder in the axial direction when the rolling mill is viewed from the exit side or the entrance side of the rolled material. A rolling mill characterized by being placed.
5. In the rolling mill according to any one of claims 1 to 4.
   A control device for driving the first cylinder is further provided.
   The control device is more than the intersection of the straight line connecting the first cylinder and the one first cylinder provided outside the axial direction of the two first cylinders and the axis of the roll. From the intersection of the straight line connecting the first cylinder and the one first cylinder provided on the outer side in the axial direction or the inner side in the axial direction of the two first cylinders and the axis of the roll. When the center of the bearing is arranged inside the axial direction and when the roll is bent, one of the two first cylinders and the first cylinder provided on the opposite side are driven. A rolling mill characterized by being configured to do so.
6. In the rolling mill according to any one of claims 1 to 5,
   A control device for driving the first cylinder is further provided.
   The control device is configured such that when the roll is bent, the difference between the total output of the two first cylinders and the output of the first cylinder provided on the opposite side is within a predetermined range. A rolling mill characterized by that.
7. In the rolling mill according to any one of claims 1 to 6.
   A rolling mill further provided between the two first cylinders with a third cylinder that further applies a bending force to the bearing in the vertical direction to bend the roll.
8. In the rolling mill according to any one of claims 1 to 6.
   At a position outside the axial direction from one of the first cylinders provided on the opposite side, one or more fourth cylinders for bending the roll by applying a bending force in the vertical direction to the bearing are further provided. ,
   When the rolling mill is viewed from the exit side or the entrance side of the rolled material, one of the two first cylinders is provided between the first cylinder and the fourth cylinder provided on the opposite side. A rolling mill characterized in that one is placed.
9. In the rolling mill according to any one of claims 1 to 8.
   The rolling mill includes a working roll that comes into contact with the rolled material and an intermediate roll that comes into contact with the working roll.
   A rolling mill characterized in that the roll is the intermediate roll.
10. In the rolling mill according to any one of claims 1 to 9.
    A fixing member fixed to at least one of the entry side and the exit side of the rolled material of the housing of the rolling mill and provided with the first cylinder.
    A rolling mill further provided with a fifth cylinder for bending the working roll by applying a bending force in the direction opposite to that of the first cylinder to the bearing of the working roll in contact with the rolled material.

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