JPH11244917A - Rolling mill array - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling mill array capable of obtaining high-quality rolled material by finely rolling the material to be rolled. SOLUTION: Plural 2-high mills F1-F7 without a housing provided with work roll assemblies whose upper work roll and lower work roll are supported with upper work roll chocks 2a, 2b and lower work roll chocks 3a, 3b are movably installed lining up them in series in the rolling direction and a rolling mill moving means for moving each 2-high mill F1-F7 to the position where it is most accessible to the other along the rolling direction during rolling and for moving to the position where each 2-high mill F1-F7 is eparated from each other along the rolling direction at the time of maintenance is provided. A frame 12 and a beam 14 which is provided above this frame 12 are connected with plural tension poles 17-19 and each 2-high mill F1-F7 is lined up and fixed between the frame 12 and the beam 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill used for finish rolling, for example.

[0002]

2. Description of the Related Art When hot rolling metal strips, bars, molds, and the like, a plurality of finish rolling mills are arranged in series in the rolling direction after coarsely-rolled material is scale-removed by a descaler. Finish rolling is performed by a series of tandem rolling mills.

FIG. 11 shows a schematic configuration of a general tandem type rolling mill row in which conventionally used hot finishing mills are arranged in series. As shown in FIG. 11, a first finishing mill F101, a second finishing mill F102, a third finishing mill F103, a fourth finishing mill F104, a fifth finishing mill F105, a sixth finishing mill F106, and a seventh finishing mill. The rolling mills are provided in series in the rolling direction with a required roll axis interval S2. Each of these finishing mills F102
And 107, a pair of upper and lower work rolls 101 to 107, a pair of upper and lower backup rolls 111 to 117, and a pressure reduction device 121 to 1 inside the housings 131 to 137, respectively.
27, that is, these finishing mills F101 to F107 have a pair of upper and lower work rolls 101 to 107 and a backup roll 111 to 1
17 is held and fixed by a pair of left and right gate-shaped housings 131 to 137 provided on the driving side and the working side, respectively, and the housings 131 to 137 are individually mounted on the floor on the driving side and the working side. It is fixed.

Here, the finishing mills F101 to F10
An example of rolling by No. 7 will be described. The oxide scale (hereinafter, simply referred to as scale) existing on the surface of the material P at 1050 ° C. is removed by a descaler (not shown) on the upstream side of the facility, and the tip of the material P is removed.
The upper and lower work rolls 101 having a required gap formed in the first finishing mill F101 are engaged with the lowering device 1.
The upper work roll 101 is rolled down to a required thickness while the upper work roll 101 is pressed down by the backup roll 111 by 21. Thereafter, the material P to be rolled is referred to as a first finish rolling mill F102-
Rolling is sequentially performed by the seventh finishing mill F107 as described above, and finish rolling is performed to a required thickness.

FIG. 12 is a diagram showing a surface temperature, a sheet thickness center temperature, a sheet average temperature, and a scale thickness of a material to be rolled in each finishing mill. For example, each finishing mill F1 in which each roll axis interval S2 is arranged at 5800 mm and the total length L2 between the work roll axes is 34.8 m.
01 to F107, the thickness of the sheet on the entry side of the hot finish rolling was 40 mm, the thickness at the completion of the finish rolling was 1.2 mm,
The surface temperature, the sheet thickness center temperature, the sheet average temperature, and the scale thickness of the material P to be rolled when the temperature is 1050 ° C. are shown.

According to this diagram, the average temperature of the material P to be rolled is slightly lowered from 1050 ° C. due to descaling, and the running between the finishing mills F101 to F107 and the work rolls 101 to 107 are performed. , And is cooled down to 880 ° C. at the exit side of the seventh finishing mill F107. When the scale thickness exceeds about 5 μm, flaws may be generated on the surface of the material P to be rolled. However, in the first finishing mill F102, about 8 μm,
About 7 μm in the finishing mill F103, the fourth finishing mill F1
04 is about 5.6 μm.

[0007]

However, such a conventional tandem rolling mill has the following problems. In other words, when rolling a high-temperature rolled material P as in hot rolling, the longer the time passed through the above-described hot tandem rolling mill row, the more the rolled material P is cooled, which is ideal in terms of its metallographic structure. In some cases, the rolling cannot be performed at an appropriate temperature, and the scale of the material to be rolled P grows due to the prolonged rolling time, and the subsequent step of removing the scale requires a significant cost. When the thickness of the scale existing in the rolled material becomes a certain value or more, this scale bites into the surface of the finish-rolled material P to form unevenness flaws, thereby significantly lowering the quality of the material P to be rolled.

Further, the biting vibration generated when the leading end of the material to be rolled P is bitten by the upper and lower work rolls 101 and the vibration due to the discontinuous sliding during rolling give a wave-like pattern to the material to be rolled P. Or uneven thickness. In the conventional finishing mills F101 to F107, the housings 131 to 13 are used.
The vibration is reduced by increasing the weight of the housing 7 or increasing the rigidity for fixing the housings 131 to 137 to the floor. However, in order to prevent such vibrations, extremely heavy housings 131 to 137 are required, and a large-scale foundation work is required to install the housings 131 to 137. Will not be worthwhile. Recently, a method of absorbing vibration by a damper controlled at a high speed has been considered, but in this case, the cost of the control device becomes very high and is not practical. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rolling mill train capable of performing good rolling and obtaining a high quality material to be rolled.

[0009]

According to a first aspect of the present invention, there is provided a plurality of two-stage units having no housing provided with a work roll assembly in which an upper work roll and a lower work roll are supported by an upper work roll chock and a lower work roll chock. The rolling mills are arranged in series in the rolling direction so as to be movable, and the two-high rolling mills are moved to the position closest to each other along the rolling direction during the rolling of the material to be rolled, and the two rolling mills are moved during maintenance. A rolling mill moving means for moving the step rolling mill to positions separated from each other along the rolling direction is provided.

According to a second aspect of the present invention, in the rolling mill train according to the first aspect, a work roll chock support member is provided on an exit side in a rolling direction, and the work roll chock support member and the two-stage rolling mill adjacent thereto are provided. The two-high rolling mills adjacent to each other are connected to each other by a connecting means capable of adjusting a distance in a rolling direction.

According to a third aspect of the present invention, in the rolling mill train according to the first aspect, a work roll chock support member is provided on each of the entry side and the exit side in the rolling direction, and the work roll chock support member on the entry side comes into contact with the work roll chock support member. A contact portion between the upper work roll chock and the lower work roll chock of the two-high rolling mill, a contact portion between the upper work roll chock and the lower work roll chock that comes into contact with the output-side work roll chock support member, and In the adjacent two-high rolling mill, engaging portions are provided at the contact portions between the upper work roll chocks and the contact portions between the lower work roll chocks so as to engage with each other in a vertically slidable manner.

According to a fourth aspect of the present invention, in the rolling mill train according to the third aspect, at least a part of the engagement means shares the upper work roll chock and the lower work roll chock of the two-high rolling mill. It is characterized in that it has a function of rotating in the horizontal direction independently of each other about the center line.

According to a fifth aspect of the present invention, in the rolling mill train according to the fourth aspect, each of the upper work roll chock and the lower work roll chock, which are horizontally rotated by the engagement means, has an end face in the roll axis direction. A supporting portion for supporting the upper work roll chock and the lower work roll chock rotatably in the horizontal direction and receiving a thrust force.

According to a sixth aspect of the present invention, there is provided a rolling mill train, wherein a pedestal provided on a floor and a beam provided on the upper side of the pedestal are connected by a plurality of tension poles. In the meantime, a plurality of two-high rolling mills without a housing with a work roll assembly that supports the upper work roll and the lower work roll with the upper work roll chock and the lower work roll chock are movably arranged in series in the rolling direction. And supported by the gantry and the beam.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing an embodiment in which known four-stage finishing mills are arranged side by side on a rolling mill row and an output side thereof in this embodiment, and FIG.
3 is an enlarged side view showing a row of rolling mills in FIG. 3, FIG. 3 is an enlarged view showing a main part of the finishing mill in FIG. 2, FIG. 4 is a sectional view taken along line AA in FIG. 3, and FIG. FIG. 6 is a diagram showing the surface temperature, sheet thickness center temperature, sheet average temperature, and scale thickness of the material to be rolled in each finishing mill provided in the rolling mill row, and FIG. FIG.

As shown in FIG. 1, the base 12, the beam 14, the entrance tension pole 17, and the intermediate tension pole 18
The first to seventh finishing mills F1 to F7 are arranged in series in the rolling direction of the material P to be rolled inside a frame constituted by the tension pole 19 and the moving pole 21. . The interval between the finishing mills F1 to F7 is set to the pitch of the shortest roll axis center interval S of the pair of upper and lower work rolls 1 provided respectively.

That is, the gantry 12 has the drive side D and the work side W arranged and fixed on the floor along the rolling direction, respectively, and the beam 14 is arranged above the gantry 12 along the rolling direction. It is attached to the girder 22. Between the gantry 12 and the beam 14, an upright entry tension pole 17 is provided at the entry side of the material P to be rolled, an upright intermediate tension pole 18 is provided at an intermediate portion, and an upright exit tension is provided at the exit side. A pole 19 is provided, and each of the tension poles 17 to 19 is connected and fixed to the gantry 12 and the beam 14. In addition, each tension pole 17-1
9 is a roll chock support member.

Also, the exit side of the seventh finishing mill F7 has 2
An eighth finishing mill F8 and a eighth finishing mill F8 in which a pair of upper and lower work rolls 41 supported by a pair of upper and lower work roll chocks 43 and a pair of upper and lower backup rolls 42 supported by a pair of upper and lower backup roll chockes 44 are provided inside the housing 40. A 9 finishing mill F9 is installed. A pair of upper and lower work rolls 46 supported by a pair of upper and lower work roll chock 47 and a pair of upper and lower backup rolls 4 supported by a pair of upper and lower backup roll chock 49 are provided on the delivery side with respect to the ninth finishing mill F8.
10 is provided inside the housing 50. The tenth finishing mill F
10 are provided side by side. The work rolls 1 and 41 of the seventh finishing mill F7 to the tenth finishing mill F10,
Reference numerals 46 are arranged at roll axis center intervals Sa, Sb, Sc.

The first to seventh finishing mills F1 to F7 will be described. In the first, third, fifth and seventh finishing mills F1, F3, F5 and F7, the upper work roll chock 2a is arranged on the driving side D and the working side W, respectively, and the second, fourth and sixth finishing mills are provided. In the machines F2, F4 and F6, upper work roll chock 2b is arranged on the driving side D and the working side W, respectively. First, third, fifth and seventh finishing mills F1,
In F3, F5, and F7, the lower work roll chock 3a is disposed on the driving side D and the working side W, respectively, and the second, fourth, and sixth finishing mills F2, F4, and F6 are disposed on the driving side D and the working side W, respectively. The lower work roll chock 3ba is arranged.

The upper work roll 1 provided in each of the first to seventh finishing mills F1 to F7 has a driving side D and a working side W.
Are arranged between the upper work roll chocks 2a and 2b, and both ends of the roll shaft are connected to the respective upper work roll chocks 2a and 2b.
a and 2b. The lower work rolls 1 provided in the first to seventh finishing mills F1 to F7 are upper work roll chocks 3a, 3b on the drive side D and the work side W, respectively.
, And both ends of the roll shaft are held by upper work roll chocks 3a and 3b, respectively.

Receiving grooves 2c are formed on both sides in the conveying direction of each upper work roll chock 2a, and ridges 2d are formed on both sides in the conveying direction of each upper work roll chock 2b. . In the contact portion between each upper work roll chock 2a and each upper work roll chock 2b adjacent to each other, the receiving groove 2c and the ridge 2d are formed.
Are slidably engaged, that is, slidably engaged. Receiving grooves 3c are formed on both sides in the conveying direction of each upper work roll chock 3a, and ridges 3d are formed on both sides in the conveying direction of each upper work roll chock 3b.
Are formed. The receiving groove 3c and the ridge 3d are slidably engaged with the upper work roll chock 3a and the upper work roll chock 3b adjacent to each other, that is, slidably engaged with each other.

Each upper work roll chock 2a, 2b is arranged above each lower work roll chock 3a, 3b,
It is supported by a balance cylinder 4 provided above each of the lower work roll chocks 3a, 3b. A pressure reduction cylinder 5 is provided between each of the upper work roll chocks 2a and 2b and the beam 14. The lower surface of each lower work roll chock 3a, 3b is fitted on a slide base 7 that slides in the roll axis direction, and this slide base 7 is supported on a movable base 8 via a height adjustment cylinder 6.
Note that a screw jack may be used instead of the height adjusting cylinder 6.

The upper and lower work rolls 1, the upper and lower work roll chocks 2a, 2b, 3a, 3b, the pressing cylinder 5, the height adjusting cylinder 6, the slide base 7,
The moving table 8 and the guide 9 are first to seventh finishing mills F1 to F7.
It is provided in. The upper work roll and the lower work roll are supported by the upper work roll chock and the lower work roll chock to form a work roll assembly. Thereby, the first to seventh finishing mills F1 to F7 have a housingless structure without a housing.

Guide rails 11 are respectively laid along the rolling direction on the gantry 12 of the driving side D and the working side W fixed on the floor, and the first to seventh finishing mills F1
Guides 9 respectively attached to the bottom surfaces of the movable bases 8 to F7 are slidably supported.

In each of the first to seventh finishing mills F1 to F7, an eye plate 26 is attached to a side surface of the truck 8 on the drive side D and the work side W, respectively. In the first to seventh finishing rolling mills F1 to F7 adjacent to each other, the connecting bolt 10 is inserted in the eye plate 26 of the bogie 8 along the rolling direction, and a threaded portion of the connecting bolt 10 is a lock nut type stopper. The nuts 27 are screwed respectively. Thereby, the carts 8 in the first to seventh finishing mills F1 to F7 adjacent to each other are connected to each other by the eye plate 2 which is an example of a connecting means.
6, the connecting bolt 10 and the stopper nut 27, and the position of each stopper nut 27 increases the distance between the axial centers S of the upper and lower work rolls 1 in the first to seventh finishing mills F1 to F7. The length is determined. Side surfaces of the output side tension poles 19 on the driving side D and the working side W and the carriage 8 of the seventh finishing mill F7
Similarly, both side surfaces of the drive side D and the work side W are also connected by an eye plate 26, a connection bolt 10, and a stopper nut 27, which are examples of connection means. It is conceivable to attach a hook in place of the eye plate 26 and use a chain or a wire rope in place of the connecting bolt 10 and the stopper nut 27. Only the unit can adjust the roll axis interval S, and the wire rope needs to change its length.

Each of the guide rails 11 laid on the gantry 12 on the drive side D and the work side W is provided with a guide 9 on the lower surface of a bogie 20 on the upstream side in the transport direction with respect to the first finishing mill F1. The carriage 20 is provided with a movable pole 21 upright. Trolley 20
Drive side D and work side W both sides of the first finishing mill F1
Both sides of the carriage 8 are connected by an eye plate 26 which is an example of a connecting means, a connecting bolt 10 and a stopper nut 27 as in the case 8 described above.

A moving cylinder 1 which is an example of a moving means is provided at an entrance end of each of the mounts 12 on the driving side D and the working side W.
3 is provided, and a rod 13a provided in each moving cylinder 13 is pivotally connected to the entry-side end face of the bogie 20 along the transport direction. As a result, the moving cylinders 13 move the rods 13a, thereby connecting the carts 20 connected to each other.
In addition, the first to seventh finishing mills F1 to F7 can move along the rolling direction. Further, when each moving cylinder 13 moves the rod 13a in the transport direction or in the direction of ryk ruins, the first to the first engaged rods adjacent to each other are engaged.
The upper and lower work roll chocks 2a, 2b, 3a, 3b of the seventh finishing mills F1 to F7 are
And it is pressed and fixed between the output side tension poles 19. The upper and lower work roll chock 2 in the first finishing mill F1 is provided on the exit side surface of the moving pole 21 of the bogie 20.
A guide plate 23 which comes into contact with the upper and lower work roll chocks 2a, 3a of the seventh finishing mill F1 is mounted on the entry side surface of the output side tension pole 19, respectively.

A guide rail 25 that engages with a guide 29 mounted on the upper end of the moving pole 21 is mounted on the lower surface on the entry side of the beam 14. Reference numeral 15 denotes a stop cylinder provided on the beam 14, and 16 denotes a stopper provided on the beam 14.

The operation of the rolling mill train configured as described above will be described. First, the upper surface heights of the lower work rolls 1 having different diameters from each other are adjusted by the respective height adjusting cylinders 6 by roll grinding to align them with the pass line of the material P to be rolled. Next, the scales on the upper surface and the lower surface were removed by a descaler (not shown).
The leading end of the material P to be rolled at 50 ° C. is
The work roll 1 is rolled to a required thickness while the work roll 1 is pressed down by the press-down cylinder 5. Thereafter, the material P to be rolled is sequentially rolled by the second finishing mill F2 to the seventh finishing mill F7 as described above, and the material P is further rolled to the eighth finishing mill F8, the ninth finishing mill F9, The tenth finishing mill F10 finish-rolls to a required thickness. The reaction force against this rolling is as follows.
4, the girder 22, the input side tension pole 17, the intermediate tension pole 18, and the output side tension pole 19.

The diagram shown in FIG. 5 shows that, for example, the distance S between the center axes of the upper and lower work rolls 1 in the first to seventh finishing mills F1 to F7 is 1600 mm, and the upper and lower work rolls 1 in the seventh finishing mill F7 are different from each other. The roll center distance Sa between the upper and lower work rolls 41 of the eighth finishing mill F8 is 2600 mm, the roll center distance Sb of the upper and lower work rolls 46 of the eighth finishing mill F8 and the ninth finishing mill F9 is 1600 mm, Each finishing mill F1 to F1 in which the roll axis center distance Sc between the roll 41 and the upper and lower work rolls 46 is 2600 mm, and the total length L between the work roll axes is 17.4 m.
0, the plate thickness on the hot rolling entry side is 40 mm,
The surface temperature, the sheet thickness center temperature, the sheet average temperature, and the scale thickness of the material P to be rolled when the sheet thickness at the time of finish rolling is 0.4 mm and the temperature at the finish rolling entrance side is 1050 ° C. is there.

As shown in the diagram of FIG. 5, compared to a conventional rolling mill having a total length L2 between work rolls of 34.8 m, 10
When the temperature of the material P to be rolled at 50 ° C. is finished by the tenth finish rolling mill F10, the average temperature of the plate is reduced from 880 ° C. to 920 ° C. as compared with the conventional tandem rolling mill row, and the temperature drop is reduced. 2.6μm to 0.5μ thick
m.

The operation of moving each finishing mill will be described with reference to FIG. In order to perform maintenance on a roll cooling device (not shown), a stripper, an online roll grinder, and the like, first to seventh finish rolling mills F1 to F
When expanding the work roll axis center interval S in 7,
The cylinder part of the rolling cylinder 5 in the first to seventh finishing mills F1 to F7 is raised. First to seventh finishing mills F1
F7 to adjust the position of the stopper nut 27 screwed to the connecting bolt 10 for connecting the carts 8 to loosen the connection.
The upper work roll chock 2a, 2b and the lower work roll chock 3a, 3b, which are in contact with each other in the seventh to seventh finishing mills F1 to F7, can be separated. When the piston 13a is moved to the upstream side in the rolling direction by driving the moving cylinder 13, the carriage 20 is moved to the upstream side, and the head of the connection bolt 10 connecting each carriage 8 and the stopper nut 27 contact the adjacent eye plate 26. The carts 8 are moved in the same direction in contact with each other, and the distance between the carts 8 and 20, that is,
Upper work roll chock 2 of seventh finishing mills F1-F7
a, 2b and the interval between the lower work roll chocks 3a, 3b are increased. That is, first, the distance between the bogie 20 and the bogie 8 of the seventh finishing mill F7 increases, and then the seventh finishing mill F
The distance between the bogie 8 of the seventh finishing mill F6 and the bogie 8 of the sixth finishing mill F6 is increased. In this way, the intervals between the trucks 8 one after another and between the truck 8 on the entry side and the tension pole 17 on the entry side are enlarged, so that maintenance can be easily performed.

When the work roll assembly including the pair of upper and lower work rolls 1 and the pair of upper and lower work rolls 2a, 2b, 3a and 3b in the first to seventh finishing mills F1 to F7 is to be rearranged, the first one is used. ~ 7th
While lowering the cylinder part of each height adjusting cylinder 6 in the finishing mills F1 to F7, the slide plate 7 and the work roll assembly in the first to seventh finishing mills F1 to F7 are respectively lowered. Each of the balance cylinders 4 raises the upper work roll chock 2a, 2b in the first to seventh finish rolling mills F1 to F7 to separate a pair of upper and lower work rolls 1 and separates each of the first to seventh finish rolling mills F1 to F7. The connecting bolt 10 for connecting the carriage 8 and the stopper nut 27 are removed, and the slide base 7 is pulled out to the working side W.

When the intermediate tension pole 18 is in the way as in the third finishing mill F3 and the fifth finishing mill F5 shown in FIG. 6, the first finishing mill F1 and the second finishing mill F
After pulling out the second and fourth finishing mills F4, the carriage 8 is pushed and moved by the moving cylinder 13 to the fifth finishing mill F5, and then the third finishing mill F3, the fourth finishing mill F4, and the fifth finishing mill F4 are pulled out. Finishing mill F6 and seventh finishing mill F7
Are connected by the connecting bolt 10 and the stopper nut 27, and are moved to the outlet side and pulled out.

In the first embodiment, the following effects can be obtained. First, first to seventh finishing mills F1 to F7 are arranged side by side in a frame formed by connecting the gantry 12, the beam 14, and the tension poles 17 to 19, and the first to seventh finishing mills F1 to F7 are arranged in this frame. By fixing the finishing mills F1 to F7, the respective work rolls 1 of the first to seventh finishing mills F1 to F7 are connected to the gantry 12 and the beam 14, and
Since the horizontal stiffness of the work rolls 1 of the seventh finishing mills F1 to F7 are mutually increased, the wavy pattern of the material P to be rolled due to the roll of the housing, which is a problem in the conventional tandem rolling mill row, is used. Occurrence can be eliminated.

The first to seventh finishing rolling mills have no housing, and the work roll axis spacing S is minimized, so that the material to be rolled P can be finished in a more ideal temperature range. Rolling becomes possible, and 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 material P to be rolled can be reduced. Therefore, it is possible to reduce the load of the downstream scale removing step, and it is possible to reduce the surface flaws of the material P to be rolled due to the scale biting.

Further, the connecting bolt 10 whose distance can be adjusted between the output side tension pole 19 and the bogies 8 and 20 can be adjusted.
And a stopper nut 27 to connect the first to seventh finishing mills and the output side tension pole 19, so that one set of the moving cylinder 13 for each of the driving side D and the working side W is provided.
Alone, the interval between the pair of upper and lower work rolls 1 and the moving poles 21 in the output tension pole 19, the first to seventh finishing mills can be freely adjusted, and the intermediate tension pole 18 can be avoided. The work roll assembly can be pulled out to the work side W for rearrangement.

Furthermore, the guide plates 23 on the entry side and the exit side and the contact surfaces of the pair of upper and lower work roll chocks 2a, 2b, 3a, 3b in the first to seventh finishing mills slide in the vertical direction. Thrust receiving grooves 2c, 3
By providing c and the thrust receiving projections 2d, 3d, even if a small thrust force is generated in the upper and lower work rolls 1, the thrust force can be supported.

Next, a second embodiment will be described with reference to FIGS. FIG. 7 is a side view showing a form in which known rolling four-stage finishing rolling mills are arranged side by side on the rolling mill row and the exit side in this embodiment, and FIG. 8 is a side view showing the rolling mill row in an enlarged manner. 9 is an enlarged view of a finishing mill provided in the rolling mill row, and FIG. 10 is a cross-sectional view taken along line BB of FIG. 8 to 10, the same parts as those in FIGS. 1 to 4 are denoted by the same reference numerals.

In FIG. 7, the gantry 12, the beam 14, the entry side tension pole 17, the intermediate tension pole 18,
Inside the frame formed by the output side tension pole 19 and the moving pole 21, the fourth to seventh finishing mills F14, F15, F16, on the exit side of the third finishing mill F3,
F17 is provided side by side in the rolling direction.

The exit side of the seventh finishing mill F17 is provided with an eighth finishing mill F, which is a known work roll cloth rolling mill.
The eighteenth and ninth finishing mills F19 are provided side by side.
The eighth finishing mill F18 and the ninth finishing mill F19 are:
A pair of upper and lower work rolls 51 respectively supported by a pair of upper and lower work roll chocks 53 and a pair of upper and lower backup rolls 52 respectively supported by a pair of upper and lower backup roll chocks 54 are provided inside the housing 60, and A pair of upper and lower work rolls 51 can be rotated about a common vertical center line by a cross cylinder 61 and a cross head 62 embedded in the housing 60 so as to be crossed.

A tenth finish rolling mill F20, which is a known pair roll cross rolling mill, is provided downstream of the ninth finishing rolling mill F19 in the rolling direction. This tenth finishing mill F
20, a pair of upper and lower work rolls 71 supported by a pair of upper and lower work roll chock 73, and a pair of upper and lower backup rolls 72 supported by a pair of upper and lower roll chock 74 are provided inside a housing 80; A pair of upper and lower work rolls 71 and a pair of upper and lower backup rolls 72 are rotated by a buried cross cylinder 81 and cross head 82 about a common vertical center line so that they can be crossed in pairs.

As shown in FIG. 8, the fourth finishing mills F14 to F14
In the seventh finishing mill F17, an upper work roll chock 32c in which both ends of the upper work roll 1 engage with each other,
The lower work roll 1 is rotatably supported by lower work rolls 33c, 33a, 33b which are engaged with each other at both ends thereof. Fifth finishing mill F15 to seventh finishing mill F
The upper work roll chock 32a, 32b and the lower work roll chock 33a, 33b in FIG. 17 are provided with a convex curved surface block 37 and a thrust receiving block 38 as described later. Upper work roll chock 3 in fifth finishing mill F15 to seventh finishing mill F17
Roller bearings 39 are provided between the lower work roll chocks 33a, 33b and the height adjusting cylinder 6, respectively, between the lower work rolls 2a, 32b and the lowering cylinder 5.

Fourth finishing mill F14 and sixth finishing mill F
16, concave surface liners 31 are buried on the output side surface of the upper work roll chock 32c and on both side surfaces of the upper work roll chock 32b, respectively. Has a concave curved liner 31 embedded therein. A concave curved plate 34 is mounted on each of the upper and lower sides of the entrance side tension pole 19 on the entrance side.

As shown in FIGS. 9 and 10, on the outer sides of both sides of the upper work roll chock 32a in the fifth finishing mill F15 and the seventh finishing mill F17, the entry side surface of the upper work roll chock 32c and the upper work roll chock 32 are provided.
Cross heads 36 slidingly contacting the concave curved liners 31 provided on both side surfaces of the upper work roll chock 32a are embedded with cross cylinders 35 for moving the cross heads 36 on both sides of each upper work roll chock 32a. In the fifth finish rolling mill F15 and the seventh finishing rolling mill F17, on both sides of the lower work roll chock 33a, the entrance side of the lower work roll chock 33c and the upper work roll chock 33b.
A cross head 36 is disposed in sliding contact with the concave curved liner 31 provided on both sides of the lower work roll chock 3.
A cross cylinder 35 for moving these cross heads 36 is embedded on both sides of 3a.

In the fifth to seventh finishing mills F15 to F17, the end faces of the working side W of the upper work roll chock 32a, 32b and the driving face D of the lower work roll chock 33a, 33b are arranged in the thrust direction. Convex curved blocks 37 each having a convex arc-shaped sliding contact surface on the outside with a thrust receiving radius R centered on a roll cross point C which is a common vertical center line are integrally formed. In addition, the end faces of the drive side D of the upper work roll chock 32a, 32b and the end face of the work side W of the lower work roll chock 33a, 33b, which are in the anti-thrust direction,
Thrust receiving blocks 38 each having a concave arc-shaped sliding contact surface which is in sliding contact with the convex arc-shaped sliding contact surface of the convex curved surface block 37 are integrally formed. The convex work surface block 37 and the thrust receiving block 38 are used for the upper work roll chock 3.
The end faces of the working side W of 2a, 32b and the end face of the driving side D of the lower work roll chock 33a, 33b are combined in a mutually opposite manner, and the thrust force SR acting on the pair of upper and lower work rolls 51, 71 when they cross each other. I have to take it. Note that a needle bearing may be interposed between the convex curved surface block 37 and the thrust receiving block 38 in order to reduce the friction coefficient due to the pressing force of the thrust force SR.

In the fifth finishing mill F15 to the seventh finishing mill F17, each upper work roll chock 32a,
A fan-shaped roller bearing 39 centering on the roll cross point C is provided between the upper end of the roller 32b and the rolling-down cylinder 5. Each lower work roll chock 33a, 33
A roller bearing 39 is also provided between the slide base 7 that supports b and the height adjustment cylinder 6.

In this manner, the upper work roll chock 32a, 32b and the lower work roll chock 33 in the fifth finishing mill F15 to the seventh finishing mill F17 are used.
a and 33b are provided so as to be rotatable in the horizontal direction independently of each other about the roll cross point C. Thus, the pair of upper and lower work rolls 1 in the fifth finishing mill F15 to the seventh finishing mill F17 is located at the roll cross point C.
Are held so as to be rotatable in the horizontal direction independently of each other. The configuration of the other parts is the same as that of the first embodiment.

The operation of this embodiment will be described.
By driving the cross cylinders 35 provided in the fifth finishing mill F15 to the seventh finishing mill F17,
Is moved to press the concave curved surface plates 34 and the concave curved liners 31 on the entrance side and the exit side. Thereby, each upper work roll chock 32 in the fifth finishing mill F15, the sixth finishing mill F16 and the seventh finishing mill F17.
a, 32b and the lower work roll chock 33a, 33b rotate around the roll cross point C, respectively. As a result, the fifth finishing mill F15 to the seventh finishing mill F17
, A pair of upper and lower work rolls 1 are rotated and displaced in the horizontal direction about a roll cross point C to cross each other at required roll cross angles θ1, θ2, θ3, and further, an eighth finishing mill F18, a ninth finishing A pair of upper and lower work rolls 51 of a rolling mill F19 and a tenth finishing rolling mill F20,
71 are rotated in the horizontal direction by the operation of the cross cylinders 61 and 81 and the cross heads 62 and 82 to cross each other in the horizontal direction.

Next, in the same manner as in the first embodiment, the material P to be rolled is sequentially rolled by a first finishing mill F1 to a fourth finishing mill F4. While detecting the crown, the fifth finishing mill F15 to the seventh finishing mill
The roll cross angles θ1, θ2, θ3 of the pair of upper and lower rolls 1 of the finishing mill F17 are appropriately adjusted, and the upper work rolls 1 are respectively adjusted by the rolling cylinders 5 via the roller bearings 39 and the upper work roll chocks 32a, 32b. The material P to be rolled is rolled while removing the crown and controlling the shape of the plate. Further, the roll cross angles of the pair of upper and lower work rolls 51 and 71 in each of the eighteenth finishing mill F18 to the twentieth finishing rolling mill F20 are appropriately adjusted, and the material P having a good plate shape is formed to a required thickness. To finish rolling.

At this time, in each of the fifth finishing mill F15 to the seventh finishing mill F17, each roller bearing 39 provided is connected to the press-down cylinder 5 and each of the upper work roll chocks 32a, 32b by the cross angle θ1. , Θ2, θ3
To rotate smoothly.

In the fifth to seventh finishing mills F15 to F17, the cross operation of the pair of upper and lower work rolls 51 and 71 causes a strong movement between the workpiece P and the pair of upper and lower work rolls 1. A large thrust force SR acts. Therefore, the thrust force SR is applied to the upper work roll chock 32a, 32b and the lower work roll chock 33.
The upper work roll chock 32a, 32b and the lower work roll chock 33a, 33b are supported by thrust receiving blocks 38, respectively, via convex curved surface blocks 37 provided on a, 33b, respectively. This cancels out the upper and lower thrust forces SR. The other operations are the same as in the first embodiment.

This embodiment has the following effects in addition to the effects of the first embodiment. First, a pair of upper and lower work roll chocks 32a, 32b, 33a,
33b, a cross cylinder 35 and a crosshead 36
Is provided, the upper and lower pair of rolls 1 of the fifth finishing mill F15, the sixth finishing mill F16, and the seventh finishing mill F17 are respectively provided with required separate roll cross angles θ1, θ2, θ.
3 makes it possible to cross each other. Therefore, in the second half rolling process of the tandem rolling mill row, the fifth finishing mill F1
In the fifth to seventh finishing mills F17, it is possible to perform rolling at a single roll cross angle θ1, θ2, θ3,
Thereby, the plate shape of the material P to be rolled can be accurately controlled.

Further, the upper work roll chock 32a, 3
2b and the lower work roll chock 33a, a convex block 37 having a convex arcuate sliding surface having a radius R centered on the roll cross point C is mounted on the end face in the thrust direction of the chocks 33a, 33b, and the convex face is formed on the end face in the anti-thrust direction. Block 37
By mounting the thrust receiving block 38 having the concave sliding surface with the sliding surface of the above, a strong thrust force SR acting in the opposite direction when the upper and lower work rolls 1 are crossed and rolled can be mutually attached on the upper and lower sides. Can be offset and supported. Therefore, a complicated thrust receiving device becomes unnecessary.

Further, by providing the pair of upper and lower work roll chocks 32b, 33b, 32c, 33c and the output side tension pole 19 with the concave curved liner 31 and the concave curved plate 34, the concave curved liner 31 and the concave curved plate 34 are provided. The concave curved surface portion prevents the cross head 36 from moving in the roll axis direction, and the fifth finishing rolling mill F15, the sixth finishing rolling mill F16, and the fifth finishing rolling mill F16, in which the thrust force SR due to the roll cloth is offset vertically. Even if a small thrust force is generated in each work roll assembly in the seventh finishing mill F17, these work roll assemblies can be supported. The present invention is not limited to the above-described embodiment, but can be implemented with various modifications.

[0056]

According to the rolling mill row of the present invention, the rolling mills constituting the rolling mill row are configured so as to have no housing and are moved individually, so that the distance between the rolling mills can be minimized. The material to be rolled can be rolled in an appropriate temperature range, and the rolling time can be shortened to suppress the thickness of the generated scale, thereby reducing the load of the scale removing process and reducing the surface flaws due to the scale biting. ADVANTAGE OF THE INVENTION According to this invention, the work of maintenance etc. can be performed easily by adjusting the space | interval of each rolling mill which comprises a rolling mill row | line | column as needed. ADVANTAGE OF THE INVENTION According to this invention, the thrust force generate | occur | produced in a work roll chock can be supported by making the work roll chock in each rolling mill which comprises a rolling mill row contact vertically and movably.

Further, according to the present invention, by rolling a material to be rolled by crossing a pair of work rolls at different cross angles for each rolling mill constituting a rolling mill row, the plate shape of the material to be rolled is obtained. Can be accurately controlled. ADVANTAGE OF THE INVENTION According to this invention, in a rolling mill which comprises a rolling mill row | line, a pair of work rolls can be crossed and the thrust force produced when rolling is performed can be offset and received. According to the rolling mill row of the present invention, the rolling mills constituting the rolling mill row are firmly supported by the frame composed of the gantry, the beam and the tension pole, thereby preventing the generation of the wavy pattern in the material to be rolled. Thus, a high quality material to be rolled can be obtained. Therefore,
The rolling mill train of the present invention can obtain a high quality material to be rolled by rolling the material to be rolled well.

[Brief description of the drawings]

FIG. 1 is a side view showing a rolling mill row according to a first embodiment of the present invention.

FIG. 2 is an enlarged side view showing a rolling mill row in the embodiment.

FIG. 3 is an enlarged view showing a rolling mill provided in the rolling mill row in the embodiment.

FIG. 4 is a sectional view taken along the line AA in FIG. 3;

FIG. 5 is a diagram showing a temperature and a scale thickness of a rolled material in each rolling mill constituting the rolling mill row of the embodiment.

FIG. 6 is a side view showing a state where the rolling mills are separated in the rolling mill row of the embodiment.

FIG. 7 is a side view showing a rolling mill row according to the second embodiment.

FIG. 8 is an enlarged side view showing the rolling mill row in the embodiment.

FIG. 9 is an enlarged view showing a rolling mill provided in the rolling mill row in the embodiment.

FIG. 10 is a sectional view taken along the line BB of FIG. 9;

FIG. 11 is a side view showing a conventional rolling mill row.

FIG. 12 is a diagram showing a temperature and a scale thickness of a rolled material in each rolling mill constituting a rolling mill row of a conventional form.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Work roll, 2a, 2b ... Upper work roll chock, 3a, 3b ... Lower work roll chock, 2c, 3c ... Thrust receiving groove, 2d, 3d ... Thrust receiving convex part, 4 ... Balance cylinder, 8, 20 ... Moving table, DESCRIPTION OF SYMBOLS 10 ... Connecting bolt, 11 ... Guide rail, 12 ... Stand, 13 ... Moving cylinder, 14 ... Beam, 17 ... Incoming tension pole, 18 ... Intermediate tension pole, 19 ... Outgoing tension pole, 21 ... Moving tension pole, 23 … Guide plate, 27… stopper nut, P… rolled material, F1… first finish rolling mill, F2… second finish rolling mill, F3… third finishing rolling mill, F4… fourth finishing rolling mill, F5… second 5 finish rolling mill, F6: sixth finishing rolling mill, F7: seventh finishing rolling mill, S: distance between roll axis centers. 32a, 32b, 32c: Upper work roll chock, 33a, 33b, 33c: Lower work roll chock, 31: Concave curved liner, 34: Concave curved plate, 35: Cross cylinder, 36: Cross head, 37: Convex curved block, 38 ... Thrust receiving block, F14: fourth finishing mill, F15: fifth finishing mill, F16: sixth finishing mill, F17: seventh finishing mill, C: roll cross point, R: thrust receiving radius, SR: Thrust force, θ1, θ2, θ3 ... Roll cross angle.

Claims (6)

[Claims] 1. A plurality of two-high rolling mills without a housing having a work roll assembly having an upper work roll and a lower work roll supported by an upper work roll chock and a lower work roll chock can be arranged in series in the rolling direction and can be moved. And moving the two-stage rolling mills to the position closest to each other along the rolling direction during rolling of the material to be rolled, and separating the two-stage rolling mills from each other along the rolling direction during maintenance. A rolling mill train provided with rolling mill moving means for moving the rolling mill to a desired position. 2. A work roll chock support member is provided on the roll-out side, and the work roll chock support member, the two-high rolling mill adjacent thereto, and the two-high rolling mills adjacent to each other are spaced from each other in the rolling direction. The rolling mill train according to claim 1, wherein the rolling mills are connected by adjustable connecting means. 3. A work roll chock support member is provided on each of the entry side and the exit side in the rolling direction, and contact between the work roll chock support member on the entry side and the upper work roll chock and the lower work roll chock that comes into contact with the work roll chock support member. Part, the contact portion between the upper work roll chock and the lower work roll chock that comes into contact with the work roll chock support member on the outgoing side and the two-stage rolling mill, the contact portion between the upper work roll chock in the two-stage rolling mill adjacent to each other, and 2. The rolling mill train according to claim 1, wherein the contact portions of the lower work roll chocks are provided with engaging means for engaging each other so as to be vertically slidable with each other. 4. A function of at least part of the engagement means for rotating the upper work roll chock and the lower work roll chock of the two-high rolling mill independently of each other about a common center line in a horizontal direction. The rolling mill train according to claim 3, comprising: 5. An upper work roll chock and a lower work roll chock which are horizontally rotated by respective end faces in the roll axis direction of the upper work roll chock and the lower work roll chock which are horizontally rotated by the engagement means. The rolling mill train according to claim 4, further comprising a support portion movably supported to receive a thrust force. 6. A pedestal provided on a floor and a beam provided above the pedestal are connected by a plurality of tension poles, and an upper work roll and a lower work are provided between the pedestal and the beam. A plurality of housingless two-pieces having a work roll assembly in which a roll is supported by an upper work roll chock and a lower work roll chock
A row of rolling mills, wherein step rolling mills are arranged in series in a rolling direction so as to be movable and supported by the gantry and the beam.