JPH11319905A - Tandem rolling mill train - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a wavy pattern of a material to be rolled as well as temp. lowering in rolling by supporting plural rolling units with a lower support base board/an upper support base board and connecting the units. SOLUTION: A frame is formed with a base board 19 (lower support base board) fixed on a floor, a pressure-proof lower board 20 (upper support base board), an inlet side tension pole 21, a middle tension pole 22, an outlet side tension pole 23 and a moving pole 29. Housingless type finishing rolling mills (rolling unit) F1-F7 arranged with a roll chock is integrated in the frame and is engaged/integrated to an outlet side tension pole 23 by a connecting bolt 17 and a stopper nut 18 to increase the rigidity. At the time of maintenance, by adjusting the stopper nut 18, a moving carriage 28 on which the moving pole 29 is mounted and the a moving carriage 12 on which the finish rolling mills (rolling unit) F1-F7 are mounted are pulled in the inlet side direction by a moving cylinder 31, an interval between respective moving carriages 12 is enlarged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a metal strip, a rod,
The present invention relates to a tandem rolling mill train for rolling a profile.

[0002]

2. Description of the Related Art FIG. 8 is a longitudinal sectional view schematically showing a tandem rolling mill row in which conventional general hot finishing mills are arranged. In FIG. 8, seven finishing mills, ie, No. No. 1 finishing mill F101, No. 1 2 Finishing mill F
102, no. No. 3 finishing mill F103, No. 3 No. 4 finishing mill F104, No. 4 No. 5 finishing mill F105, No. 5 6
Finishing mill F106, and No. 1 7 Finishing mill F107
Are arranged in order at a required interval. Each of the finishing mills F101 to F107 has a housing 131 to 137 formed in a gate shape. Inside the gate-shaped housings 131 to 137, upper and lower work rolls 10 are provided.
1 to 107, upper and lower backup rolls 111 to 117
And the press-down devices 121 to 127 are installed therein, and the driving side and the working side are individually fixed on the floor. And the biting vibration of the rolled material 100,
Efforts have been made to reduce vibrations caused by discontinuous sliding of the rolled material 100 during rolling by increasing the weight of the housings 131 to 137 themselves and increasing the rigidity for fixing to the floor surface.

For example, an oxide scale (hereinafter simply referred to as “scale”) on the surface of a rolled material 100 at 1050 ° C.
It is removed by a descaler (not shown) on the upstream side of this equipment, and this tip is no. The finishing roll F101 is engaged with the upper and lower work rolls 101 having a required gap formed therein, and the rolling roll 1 is moved by the rolling-down device 121.
The work roll 101 is rolled to a required thickness while being reduced through the work 11. Hereinafter, this rolled material 100 is referred to as No. 2
Finishing mill F102-No. 7 Finishing mill F107
No. Rolling is performed sequentially in the same manner as in the case of the one finishing mill F101, and finish rolling is performed to a required thickness.

[0004]

However, in the above-mentioned hot tandem finish rolling mill train, the following (1) and (2)
There is a problem shown in (1) Vibration when biting the tip of the rolled material 100,
Vibration due to discontinuous sliding during rolling gives a wavy pattern to the surface of the rolled material 100 or generates uneven thickness. To cope with this problem by improving the weight of the housings 131 to 137 and the rigidity with respect to the floor surface, a remarkably large weight and a large-scale foundation work are required, and the equipment cost is not justified. Recently, a method of absorbing vibration by a damper controlled at a high speed has been considered, but the cost of the control device is high. (2) In the case of rolling a high-temperature rolled material 100 such as hot rolling, the longer the time passed through the above-described hot tandem rolling train, the lower the temperature of the rolled material 100 becomes, which is ideal in terms of its metallographic structure. There is a case that cannot be rolled at a high temperature. In addition, the scale grows on the surface of the rolled material 100 due to the longer rolling time, and the subsequent step of removing the scale includes:
When the cost is extremely high, or when the thickness of the scale exceeds a certain value during rolling, the finished rolled material 100
This scale bites into the surface of the surface, causing the surface to be unevenly scratched, and the quality thereof is significantly reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to improve rigidity and suppress generation of a wavy pattern on a rolled material without a great increase in equipment cost. To provide a series of tandem rolling mills. In addition, an object of the present invention is to provide a tandem rolling mill train capable of further reducing the temperature drop during rolling.

[0006]

In order to achieve the above object, the present invention provides a tandem rolling mill train according to the present invention, wherein a vertical work roll and a vertical backup roll for the vertical work roll are supported by a roll chock. A plurality of rolling mill units, and the plurality of rolling mill units are supported and connected by a lower support platform and an upper support platform.

According to the present invention, the plurality of rolling mill units are supported and connected by the lower support base and the upper support base, so that the horizontal rigidity between the upper and lower work rolls of each rolling mill unit is increased. However, it is possible to reduce the occurrence of a wavy pattern on the surface of the rolled material due to the roll of the housing, which is a problem in the conventional tandem rolling mill train. In the present invention, if adjacent rolling mill units are mechanically engaged with each other, even if a small thrust force is generated on the upper and lower work rolls and the upper and lower backup rolls, the thrust force can be supported, and the rolling accuracy can be improved. Contribute to improvement. Further, in the present invention, it is desirable that the rolling mill unit is configured to be movable in the rolling pass line direction. In other words, when the interval between adjacent rolling mill units is minimized during rolling, the time required for the material to be rolled to pass through the tandem rolling mill row is reduced, and a reduction in rolling temperature can be prevented. On the other hand, when performing maintenance of the rolling mill unit and other auxiliary facilities, the interval between the rolling mill units may be increased.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, although the form described below is a preferable specific example of the present invention, various technically preferable limitations are added thereto. However, the scope of the present invention is not limited to the following description, which particularly limits the present invention. It is not limited to these forms unless otherwise stated.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a side view of a row of tandem rolling mills, FIG. 2 is an enlarged side view of an entrance side and an exit side of FIG. FIG. 3 shows A in FIG.
FIG. 4 is a side view of the tandem rolling mill row shown in FIG. 1 with the finishing mills separated at a predetermined interval.

1 to 4, a base plate 19 as a lower support base fixed on the floor, a pressure-resistant lower plate 20 as an upper support base, an entrance tension pole 21, an intermediate tension pole 22, and an exit side. In the frame formed by the tension pole 23 and the moving pole 29, the rolling mill unit No. No. 1 finishing mill F1, No. 1 2 Finishing mill F
2, No. No. 3 finishing mill F3, No. 3 4 Finishing Mill F
4, No. No. 5 finishing mill F5, No. 5 6 Finishing mill F
6, No. Seven finishing mills of a seven finishing mill F7 are installed. Each of the finishing mills F1 to F7 is provided with an upper work roll 1 and a lower work roll 2, and an upper backup roll 3 and a lower backup roll 4, respectively.

More specifically, both ends of the upper work roll 1 and the lower work roll 2 are mounted on the upper work roll chock 5 and the lower work roll chock 6, respectively. Both ends of the upper backup roll 3 and the lower backup roll 4 are connected to an upper backup roll chock 7a,
7b and the lower backup roll chocks 8a, 8b. The upper backup roll chock 7a, 7b and the lower backup roll chock 8
The upper work roll chock 5 and the lower work roll chock 6 are housed in a and 8b, and are supported by a roll bending cylinder 10 (see FIG. 2) housed in upper and lower backup roll chock 7a, 7b, 8a and 8b. The upper and lower backup rolls 7a and 8a are to the finishing mills F1, F3, F5 and F7, and the upper and lower backup rolls 7b and 8b are to the finishing mills F2, F4 and F6.
Applied to

Lower backup roll chocks 8a, 8b
A balance cylinder 9 (see FIGS. 2 and 3) for supporting the upper backup roll chocks 7a and 7b is provided in the upper part of the housing. On the exit side surface of the movable pole 29 and the entrance side surface of the exit tension pole 23, the projections are formed by the guide grooves 7c, 8c of the upper and lower backup roll chocks 7a, 8a.
The guide plate 24 is engaged with the guide plate 24.

Each lower backup roll chock 8
The lower surfaces of a and 8b are respectively fitted to the respective slide bases 11 so as to slide in the roll axis direction, and the bottom surfaces of the slide bases 11 are provided with height adjusting cylinders 13 mounted on the respective moving bases 12. The rod part is fixed. Note that a screw jack may be used instead of the height adjustment cylinder 13. The bottom surface of the movable table 12 is supported in contact with the upper surface of the platform 19. Hydraulic jacks 14 are mounted at both ends in the roll axis direction, and eye plates 16 are mounted on both side surfaces in the roll axis direction. A wheel 15 that engages with a rail 26 laid on the base 19 is rotatably mounted on a rod portion of the hydraulic jack 14. A guide rail and a guide are provided in place of the rail 26 and the wheel 15, and the hydraulic jack 1 is provided.
4 may be provided with this guide.

A movable pole 29 is erected on a movable carriage 28 which is moved by a movable cylinder 31, and an eye plate 16 is mounted on both sides of the movable pole 29. The eye plate 1 is also provided on both sides of the output side tension pole 23 in the roll axis direction.
6 is mounted. A connecting bolt 17 is inserted into a loose hole of each eye plate 16, and a stopper nut 18 of a double nut type is screwed therein. On the lower surface of the pressure-resistant lower panel 20, a pressing cylinder 25 for pressing down the upper backup roll chocks 7a and 7b is mounted. Note that the movable cart 28 may be a self-propelled type, and the movable cylinder 31 may be omitted.

These upper and lower work rolls 1, 2, upper and lower backup rolls 3, 4, upper and lower work roll chock 5, 6, upper and lower backup roll chock 7a, 7b,
8a, 8b, balance cylinder 9, roll bending cylinder 10, pressing down cylinder 25, height adjusting cylinder 1
No. 3, the slide base 11, the moving base 12, the wheels 15, etc. No. 1 finishing mill F1, No. 1 No. 2 finishing mill F2, No. 2 No. 3 finishing mill F3, No. 3 4 Finishing Mill F
4, No. No. 5 finishing mill F5, No. 5 6 Finishing mill F
6, No. Each of the 7 finishing mills F7 is configured.

The side surfaces of the upper and lower backup roll chocks 7a, 7b, 8a, 8b and the guide plates 24 on the entrance and exit sides are vertically extended by guide grooves 7c, 8c and guide projections 7d, 8d. Slidably engage. In FIG. 1, the moving carriage 2 is moved by the moving cylinder 31.
8 and pressed by a slidable force via the moving pole 29.

A guide rail 27 that engages with a guide 30 mounted on the upper end of a moving pole 29 is mounted on the lower surface on the entry side of the pressure-resistant lower panel 20. A stop cylinder 35 and a stopper 34 are mounted on the pressure-resistant lower panel 20.
A stop cylinder 33 and a stopper 32 are also mounted on the entry side of the base plate 19.

Next, the operation of the first embodiment will be described. First, the upper surface height of each lower work roll 2 whose diameter has become irregular due to roll grinding is determined by the respective height adjusting cylinders 1.
3 are adjusted to align with the pass line of the rolled material 100. At this time, the rolling mills F1 to F7 are connected to each other by the guide grooves 7c, 8c and the guide convex portions 7 as shown in FIG.
d, 8d, and the interval between the upper and lower work rolls 1, 2 is minimized. Next, the respective upper backup roll chocks 7a and 7b supported by the balance cylinder 9 are respectively reduced by the respective lowering cylinders 25 to form a required gap between the respective upper work rolls 1 and the lower work rolls 2, For example, the leading end of the rolled material 100 at 1050 ° C. from which the scale on the surface was removed by a descaler (not shown) The upper work roll 1 is pressed down by the press-down cylinder 25, and bending is applied to the upper and lower work rolls 1 and 2 by the bending cylinder 10 to adjust the plate shape while adjusting the plate shape. And roll it.

Hereinafter, this rolled material 100 is referred to as No. 2 Finishing mill F2-No. No. 7 finishing mill F7. Finish rolling is performed to a required thickness while sequentially adjusting the plate shape as in the case of the one finishing mill F1. At this time, the rolling reaction force is supported by the base plate 19, the pressure-resistant lower plate 20, the entry-side tension pole 21, the intermediate tension pole 22, and the exit-side tension pole 23 fastened to the floor.

FIG. 4 shows a state in which the intervals between the finishing mills F1 to F7 are enlarged for maintenance of a roll cooling device (not shown), a stripper, an online roll grinder and the like. 4 can be changed from the state of FIG. 1 to the state of FIG. First, the cylinder portion of the height adjustment cylinder 13 is lowered, and the lower surface of the slide base 11 is brought into contact with the moving base 12 to directly support the slide base 11.

Next, the distance between the stopper nut 18 and the output side eye plate 16 is adjusted to a required size, and the wheels 15 are pressed down to the rails 26 by the respective hydraulic jacks 14 so that the respective moving tables 12 are moved to the base plate 19. Surface. At the same time, the stoppers 32, 34 are
Is lowered and raised to unlock the movable carriage 28 and the guide 30, and the movable carriage 28 is moved by the movable cylinder 31.
To the entry side. Then, the movable cart 28 and the No.
The heads and the stopper nuts 18 for the respective connection bolts 17 connecting the moving table 12 of one finishing mill F1 abut on the adjacent eye plate 16. Then, first, the moving cart 28 and the moving pole 29 and the No. The distance between the moving stand 12 of the finishing mill F1 and the moving stand 12 is increased to a required size. 2
The moving table 12 of the finishing mill F2 and the No. 3 finishing mill F3
The distance between the vehicle and the movable carriage 12 is increased. In this way,
One after another between the movable tables 12 and the output side tension pole 2
Since the interval between the three is increased, maintenance can be easily performed. It should be noted that a hook may be attached instead of the eye plate 16 and a chain or a wire rope may be used instead of the connecting bolt 17 and the stopper nut 18. However, in the case of the above-mentioned increase in the interval, the chain has only one link unit. It cannot be adjusted and the wire rope needs to change its length.

Each of upper and lower work rolls 1 and 2, upper and lower backup rolls 3 and 4, upper and lower work roll chocks 5 and 6, and upper and lower backup roll chocks 7a and 7 are provided.
When the roll assembly composed of b, 8a, 8b, etc. is to be rearranged, the upper work roll chock 7a, 7b is supported by each balance cylinder 9, the hydraulic pressure is locked, and the slide base 11 is pulled out to the working side W. I just need.

No. 3 shown in FIG. 3 Finishing mill F3 or N
o. When the entry-side tension pole 21 and the intermediate tension pole 22 are in the way as in the case of the five finishing mill F5,
No. No. 1 finishing mill F1, No. 1 No. 2 finishing mill F2 and No. 2 After the roll assembly of the fourth finishing mill F4 was pulled out, the moving cylinder 31 was used. No. 3 finisher rolling mill F3 is pushed and moved to the exit side to pull out. No. 5 finishing mill F5 and No. 5 The connection between the 6-finish rolling mill F6 and the 6-finish rolling mill F6 may be released by removing the stopper nut 18, moved to the entry side, and pulled out.

In the first embodiment, the following (1) to (1)
This has the effect (5). (1) No. 1 to No. By connecting the 7 finishing rolling mills F1 to F7 with the base plate 19 and the pressure lowering plate 20, the horizontal rigidity of each of the upper and lower work rolls 1 and 2 increases with each other. It is possible to eliminate the wavy pattern of the rolled material 100 due to the rolling of the housing. (2) Since each of the finishing mills F1 to F7 is housingless and the distance between the center axes of the upper and lower work rolls 1 and 2 is minimized, the rolled material 10 can be formed in a more ideal temperature range.
0 can be finish-rolled, and its mechanical properties such as strength and elongation can be further improved. Further, since the finish rolling time can be significantly reduced as compared with the conventional tandem rolling mill train, the scale thickness of the rolled material 100 can be reduced. Therefore, the burden on the downstream scale removing step can be reduced, and the surface flaws of the rolled material 100 caused by the scale biting can be reduced. (3) By providing the connecting bolt 17 and the stopper nut 18 whose intervals can be adjusted between the output side tension pole 23, the movable base 12, and the movable base 28, one set of the movable side D and the working side W is provided. It is possible to freely adjust the distance between the output tension pole 23, the upper and lower work rolls 1 and 2 and the moving pole 29 by simply moving the entrance tension pole 23, and it is possible to easily cope with the maintenance, and the entrance tension pole 21. In addition, the roll-up assembly can be pulled out to the working side W for rearrangement while avoiding the intermediate tension pole 22. (4) Each guide plate 24 on the entrance side and the exit side, and the upper and lower backup roll chocks 7a, 7b, 8a,
8b guide grooves 7 which slide on each other in the up-down direction
c, 8c and guide projections 7d, 8d are provided, and these are engaged at the time of rolling.
Even if a small thrust force is generated in the upper and lower backup rolls 3 and 4, this thrust force can be supported. (5) By providing the hydraulic jacks 14 and the wheels 15 as floating means for moving from the base plate 19 to each of the bases 12, the entire bottom surface of the base 12 can be supported by the base 19 during rolling. Become. Therefore, the rolled material 10
0 can withstand high pressure during rolling.

FIGS. 5 to 7 show a second embodiment of the present invention. FIG. 1 is a side view of a tandem rolling mill row, and FIG. 6 is an enlarged side view of a delivery side of the tandem rolling mill row of FIG. FIG. 7
FIG. 7 is a plan view showing a BB cross section of FIG. 6. In FIGS. 5 to 7, the same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 5, a base 19 fixed on the floor
No. 1 having a work roll cross function is provided on the output side in the frame formed by the pressure-resistant lower plate 20, the input side tension pole 21, the intermediate tension pole 22, the output side tension pole 23, and the moving pole 29. 6 finishing mill F16
And No. 1 having a pair roll cross function. A seven finishing mill F17 is arranged. Also, the outgoing tension pole 2
A concave curved plate 73 is mounted on the entry side surface of 3.

In FIG. 6 and FIG. No. 6 finishing mill F16 and No. 6 7 Both ends of the upper work roll 51 and the lower work roll 52 of the finishing mill F17 are axially mounted on the upper work roll chock 55b, 55a and the lower work roll chock 56b, 56a, respectively, and both ends of the upper backup roll 53 and the lower backup roll 54. Are mounted on the upper backup roll chock 57b, 57a and the lower backup roll chock 58b, 58a, respectively. Upper work roll chocks 55b, 5 on the drive side D which is the anti-thrust direction of the upper and lower work rolls 51, 52.
5a and work roll chock 56b, 5 under work side W
6a, a work roll thrust receiving block 8 having a concave curved surface with a thrust receiving radius R centered on the cross point C.
A convex curved surface block 82 which engages with a work roll thrust receiving block 81 is mounted on the lower work roll chock 56b, 56a of the drive side D in the thrust direction and the upper work roll chock 55b, 55a of the work side W, respectively. . The upper and lower work roll thrust forces Sw
1. To reduce the friction coefficient due to the pressing force of Sw2,
A needle bearing may be interposed. The upper work roll chock 55b, 55a and the lower work roll chock 56b, 56a are composed of an upper backup roll chock 57b, 57a and a lower backup roll chock 58.
b, 58a.

No. Upper backup roll chock 57b on the drive side D in the thrust direction of the six finishing mill F16
A convex flat block 84 is provided on the lower backup roll chock 58b of the work side W, and the lower backup roll chock 58b and the work side W of the drive side D which are in the anti-thrust direction.
A backup roll thrust receiving block 83 that supports each convex flat block 84 is mounted on the upper backup roll chock 57b.

No. The N side of the upper and lower backup roll chocks 57b, 58b of the six finishing mill F16 has N
o. The convex guide portions 57d, 58d engaging with the guide grooves 7c, 8c of the upper and lower backup roll chocks 7b, 8a of the fifth finishing mill F5 have concave curved surface portions 57c, 5d on the delivery side.
8c are respectively formed. The upper and lower backup roll chocks 57b and 58b have crossheads 6 respectively.
A cross cylinder 67 that presses the upper and lower work roll chocks 55b and 56b by 8 is provided.

No. No. 7 is attached to the upper and lower backup roll chocks 57a and 58a of the finishing mill F17 by the crosshead 62. The concave curved surface portions 57c of the upper and lower backup roll chocks 57b, 58b of the six finishing mill F16,
A cross cylinder 61 for pressing the upper and lower concave curved plates 73 and 74 of the tension pole 23 and the tension pole 23;
Further, a bending cylinder 10 is provided. An upper roller bearing 75 that engages with the press-down cylinder 25 is mounted on the upper surface of the upper backup roll chock 57a, and a lower roller bearing 76 is interposed between the lower backup roll chock 58a and the height adjustment cylinder 13.

In addition, No. 6 finishing mills F16 and N
o. No. 7 finishing mill F17 may be a work roll cross type or a pair cross type. 1 finish rolling mills F1-No. All of the seven finishing mills F17 may be of a work roll cross type or a pair cross type. Other configurations are the same as those of the first embodiment.

Next, the operation of the second embodiment will be described. First, no. The respective cross cylinders 67 of the six finishing mill F16 are operated, and the upper and lower work roll chocks 55b and 56b are pressed by the cross head 68,
The upper work roll 51 and the lower work roll 52 cross each other at a required cross angle θ1. With this, N
o. 7 by the cross cylinder 61 of the finishing mill F17, the cross head 62 presses the concave curved surface portion 57c and the concave curved plate 73, and the upper work roll 51 and the lower work roll 52 are paired with each other at a required cross angle θ2. The cloth is crossed to prepare for the finish rolling of the rolled material 100.

Next, as in the first embodiment, No. 1
Finishing mills F1-No. The rolled material 100 is sequentially rolled by a finishing mill F5, and the sheet shape and the sheet crown are detected by a sheet shape detector (not shown). No. 6 finishing mill F16 and No. 6 Cross angle θ of 7 finishing mill F17
1 and θ2 are appropriately adjusted, and each upper work roll 1 is pressed down. 7 upper and lower work rolls 51, 5 by the bending cylinder 10 of the finishing mill F17.
Bending is applied to 2 and rolling is performed while eliminating the crown of the plate and controlling the plate shape. At this time, No. The upper and lower roller bearings 75 and 76 of the seven finishing mill F17 smoothly rotate the pressing cylinder 25 and the height adjusting cylinder 13 and the upper and lower backup roll chocks 57a and 58a at a required cross angle θ2.

As shown in FIG. 6 Finishing mill F
16 and No. The strong upper work roll thrust force Sw1 and lower work roll thrust force Sw2 acting between the rolled material 100 and the upper work roll 51 and the lower work roll 52 by the roll cloth of the 7 finishing mill F17 are applied to the convex curved surface block 82. The upper and lower work roll thrust forces Sw1 and Sw2 cancel each other. Also,
No. In the six finishing mill F16, the upper backup roll thrust force Sb1 and the lower backup roll thrust force Sb2 of the upper backup roll 53 and the lower backup roll 54 with respect to the upper and lower work rolls 51 and 52.
Are supported by the backup roll thrust receiving block 83 via the convex plane block 84, and the upper and lower backup roll thrust forces Sb1 and Sb2 cancel each other.

The upper and lower backup roll chocks 57b,
The convex guide portions 57d, 58d on the entry side surface of 58b are N
o. The upper and lower work rolls 51, 52 for the rolled material 100 engage with the guide grooves 7c, 8c on the exit side surfaces of the upper and lower backup roll chocks 7b, 8b of the five finishing mill F5.
No. 3 is generated in the thrust forces Sw1 and Sw2 of Even if a small thrust force is generated in the upper and lower roll assemblies of the six finishing mill F16, the thrust force is supported. Further, the concave curved surfaces 57c, 58c and the concave curved plate 7 on the exit side surfaces of the upper and lower backup roll chocks 57b, 58b.
3 prevents the crosshead 62 from moving in the roll axis direction, and the thrust forces Sw1 and Sw by the pair cloth.
No. 2 which canceled each other up and down. Even if a small thrust force is generated in the upper and lower roll assemblies of the seven finishing mill F17, the thrust force is supported. Other operations are the same as those of the first embodiment.

The second embodiment has the following effects (1) to (3) in addition to the effects of the first embodiment. (1) Upper and lower backup roll chocks 57a, 57
No. b, 58a, 58b were provided with cross cylinders 61, 67 and cross heads 62, 68 as roll cross means. No. 6 finishing mill F16, No. 6 7
The upper and lower work rolls 51 and 52 of the finishing mill F17 can cross each other at required separate roll cross angles θ1 and θ2. Therefore, in the final rolling step of the tandem rolling mill row, it is possible to perform rolling at a single roll cross angle θ1 and θ2, respectively.
0 can be accurately controlled. (2) A convex curved surface block 82 having a convex arc-shaped sliding surface with a thrust receiving radius R centered on the cross point C is mounted on the end surfaces of the upper work roll chocks 55a and 55b and the lower work roll chocks 56a and 56b in the thrust direction, By mounting the work roll thrust receiving block 81 having a concave sliding surface that engages with the curved surface of the convex curved block 82 on the end surface in the anti-thrust direction, the upper and lower work rolls 51 and 5 are mounted.
When the rolls 2 are crossed and rolled, the strong upper and lower work roll thrust forces Sw1 and Sw2 acting in opposite directions can be offset and supported in the upper and lower directions. In addition, the upper and lower backup roll chocks 57b, 58b are provided with a convex flat block 84 on the end face in the thrust direction and a backup roll thrust receiving block 83 engaging with the convex flat block 84 on the end face in the anti-thrust direction. In the case of the work roll cloth of the work rolls 51 and 52, the upper and lower backup roll thrust forces Sb1 and Sb2 acting on the upper and lower backup rolls 53 and 54.
Can be supported by canceling each other up and down. Therefore, a complicated thrust receiving device becomes unnecessary. (3) Upper and lower backup roll chocks 57b, 58b
A concave curved surface portion 57c is formed on the output side tension pole 23.
Is provided with the concave curved surface plate 73, the concave and convex portion 57 c and the concave curved surface portion of the concave curved surface plate 73 use the upper and lower backup roll chocks 57 via the crosshead 62.
No. a, 58a can be prevented from moving in the roll axis direction, and the upper and lower work roll thrust forces Sw1, Sw2 due to pair cloth are mutually offset vertically. Even if a small thrust force is generated in the upper and lower roll assemblies of the seven finishing mill F17, this thrust force can be supported.

[0037]

As described above, according to the present invention, the plurality of rolling mill units are supported and connected by the lower support base plate and the upper support base plate, so that the upper and lower work rolls of each rolling mill unit can be moved in the horizontal direction. Rigidity increases with each other, and it is possible to reduce the occurrence of a wavy pattern on the surface of the rolled material due to the roll of the housing, which is a problem in the conventional tandem rolling mill train.

Further, if adjacent rolling mill units are mechanically engaged with each other, even if a small thrust force is generated on the upper and lower work rolls and the upper and lower backup rolls, the thrust force can be supported, and The accuracy is improved.

Further, if the rolling mill unit is configured to be movable in the direction of the rolling pass line, the material to be rolled passes through the tandem rolling mill row by minimizing the interval between adjacent rolling mill units during rolling. The time can be shortened to prevent the rolling temperature from lowering, and the maintenance of the rolling mill unit and other auxiliary equipment can be performed by increasing the interval between the rolling mill units.

[Brief description of the drawings]

FIG. 1 is a side view of a tandem rolling mill row as a first embodiment of the present invention.

FIG. 2 is an enlarged side view of an entrance side and an exit side of FIG.

FIG. 3 is a front view of a main part taken along a line AA in FIG. 2 with a main part cut away.

FIG. 4 is a side view of the tandem rolling mill row of FIG. 1 in which finishing mills are separated at a required interval.

FIG. 5 is a side view of a tandem rolling mill as a second embodiment of the present invention.

6 is an enlarged side view of a delivery side of the tandem rolling mill row in FIG.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a longitudinal sectional view schematically showing a conventional tandem rolling mill row.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper work roll 2 Lower work roll 3 Upper backup roll 4 Lower backup roll 5 Upper work roll chock 6 Lower work roll chock 7a, 7b Upper backup roll chock 8a, 8b Lower backup roll chock 7c Guide groove 7d Guide protrusion 8c Guide groove 8d Guide protrusion 19 base plate (lower support base plate) 20 pressure-resistant lower plate (upper support base plate) 61,67 cross cylinder 62,68 crosshead 100 rolled material C cross point R thrust receiving radius θ1 cross angle θ2 cross angle F1 to F7, F16 , F17 Finish rolling mill (rolling mill unit)

Claims (3)

[Claims] An upper and lower work roll, and an upper and lower backup roll for the upper and lower work rolls have a plurality of rolling mill units supported by roll chocks, and the plurality of rolling mill units are formed by a lower support base plate and an upper support base plate. A tandem rolling mill train that is supported and connected. 2. The tandem rolling mill train according to claim 1, wherein adjacent rolling mill units are mechanically engaged with each other. 3. The tandem rolling mill train according to claim 1, wherein the rolling mill unit is supported so as to be movable in a rolling pass line direction.