JPH10180319A - Roll cross two-stage rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a rolling mill compact by simplifying its structure and also unnecessitating a large-sized housing and to reduce the manufacturing cost and maintaining/controlling cost. SOLUTION: This rolling mill is provided with inner bushes 3, 13 for elevating and lowering rolls or crossing the rolls which are rotated at required angles in the shaft end parts of an upper work roll 1 and lower work roll 2 and outer eccentric bushes 5, 15 for crossing the rolls or elevating and lowering the rolls and the upper work roll 1 and lower work roll 2 are supported to a frame 30 through the inner eccentric bushes 3, 13 and outer eccentric bushes 5, 15. By rotating the inner eccentric bushes 3, 13 and outer eccentric bushes 5, 15 respecrively at the required angles, the adjustment of a roll gap and roll crossing angle is executed, the structure is simplified, also the large-sized housing is unnecessitated and the manufacturing cost and maintaining/controlling cost of the rolling mill are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of rolling a rolled material such as a steel plate by crossing upper and lower work rolls with each other.
It relates to a step rolling mill.

[0002]

2. Description of the Related Art Referring to FIG.
The rolling mill will be described. FIG. 12 shows a conventional roll cloth 2.
The side view of the high-speed rolling mill is shown. In FIG. 12, both shaft ends of an upper work roll 61 and a lower work roll 62 are axially mounted on an upper bearing box 63 and a lower bearing box 64, respectively. The interior is above and below the pass line. The upper work roll 61 mounted on the upper bearing box 63 is suspended from the housing 70 by a balance cylinder 71, and a screw-down cylinder 65 and a screw-down screw 66 are interposed between the upper surface of the upper bearing box 63 and the upper part of the housing 70. Is equipped. A height adjusting cylinder 67 is interposed between the lower surface of the lower bearing box 64 and the lower portion of the housing 70.

A crosshead 68 is formed on the entrance side and the exit side of both housings 70 so that a sliding portion between the upper bearing box 63 and the lower bearing box 64 is formed with a curved surface in the vertical direction in the roll axis direction.
Are slidably mounted, and the crosshead 68 is connected to cross cylinders 69 mounted on the entrance and exit sides of both housings 70, respectively. Both side surfaces of the upper bearing box 63 and the lower bearing box 64 are laterally supported by curved surfaces of the respective crossheads 68. FIG. 12 shows the working side of this two-high rolling mill.
The drive-side ends (not shown) of the upper work roll 61 and the lower work roll 62 are respectively connected to drive units (not shown) via universal joints.

In some cases, a screw jack is used instead of each cross cylinder 69.

As shown in FIG. 12, the lower work roll 62 is moved up and down by both height adjusting cylinders 67 to set the height of the upper surface thereof, and the upper work roll 61 is moved by both the pressing screw 66 and the balance cylinder 71. The roll gap with the lower work roll 62 is set up and down. Next, the upper and lower entry side and exit side of the crosshead 68 is respectively moved in opposite directions up and down by the cross cylinder 69, the mill and the axis L ₂ of the axis L ₁ and the lower work roll 62 of the upper work roll 61 A cross is made at a required cross angle θ from the center axis C. Then, while the upper work roll 61 and the lower work roll 62 are rotated by a driving device (not shown), the conveyed rolled material 60 is engaged between the upper and lower work rolls 61 and 62 and rolled to a required thickness.

If the thickness of the rolled material 60 changes during rolling,
The lower work cylinder 65 is finely operated to make the upper work roll 6
The height (roll gap) of 1 is finely adjusted to keep the thickness of the rolled material 60 constant. When the thickness distribution of the rolled material 60 fluctuates, each cross cylinder 69 is finely operated to finely adjust the cross angle of the upper and lower work rolls 61 and 62, and the crossed angle of the rolled material 60 in the plate width direction is adjusted. Keep the thickness distribution constant.

[0007]

The cross roll two-high rolling mill as described above has the following problems.

(1) A large and heavy housing 70 is required, and the structure is complicated, so that the rolling mill becomes expensive.

(2) The upper work roll 61 is moved up and down by the screw 66 and lowered by the screw cylinder 65, and the lower work roll 62 is supported by the height adjusting cylinder 67. Therefore, the screw 66 and the screw cylinder 65 are rolled during rolling. In addition, the height adjusting cylinder 67 needs to be able to withstand the rolling reaction force. For this reason, the capacity of the screw down screw 66, the screw down cylinder 65, and the height adjusting cylinder 67 is increased, and it becomes expensive. The rolled material 60
During rolling, the lower cylinder 65 is finely operated to directly raise and lower the upper work roll 61 to adjust the thickness of the rolled material 60. Therefore, the operating stroke of the lower cylinder 65 is small, and the accuracy of operation control is required to be improved. You.

(3) Since the upper and lower work rolls 61 and 62 are crossed by the cross cylinder 69 and the crosshead 68, the cross angle of the upper and lower work rolls 61 and 62 tends to increase during the rolling of the rolled material 60, so-called crotch. The cross cylinder 6 whose tearing force is at the upper left and lower right in FIG.
9, the cross cylinder 69 must be able to withstand the crotch force. For this reason, the capacity of the cross cylinder 69 becomes large, and it becomes expensive. Further, during rolling of the rolled material 60, the cross cylinder 69 is finely operated to finely adjust the cross angle of the upper and lower work rolls 61 and 62 directly. Therefore, the operation stroke of the cross cylinder 69 is small, and the accuracy of operation control is required to be improved. You.

(4) Large and heavy housing 7
0, the upper and lower work rolls 61 and 62 are required when a plurality of cross roll two-high rolling mills are arranged in tandem.
And the distance from the work rolls of the other rolling mills cannot be shortened, and the run-out (meandering) when the tail end of the rolled material 60 comes off from the upstream work roll increases, and the rolling line becomes longer. Become. In addition, since the rolling time between rolling mills is long, the temperature of the rolled material 60 is greatly reduced in the case of hot rolling, and the amount of scale generated on the surface increases.

[0012]

According to the present invention, there is provided a roll cloth two-stage rolling method in which a rolled material is passed between an upper work roll and a lower work roll which are crossed with each other. A rolling mill, wherein one shaft end or both shaft ends of the upper work roll is rotatably supported on an upper inner eccentric bush via a bearing, and one shaft end or both shaft ends of the lower work roll. The shaft end is rotatably supported by a lower inner eccentric bush via a bearing, and the upper inner eccentric bush and the lower inner eccentric bush are rotatably supported by an upper outer eccentric bush and a lower outer eccentric bush, respectively. The upper outer eccentric bush and the lower outer eccentric bush are rotatably supported on a frame to adjust a gap between the upper and lower work rolls or a cross adjustment of the upper and lower work rolls. A first bush rotating means for rotating the upper inner eccentric bush and the lower inner eccentric bush, and the upper outer eccentric to adjust the cross between the upper and lower work rolls or the gap between the upper and lower work rolls. A bush and a second bush rotating means for rotating the lower outer eccentric bush are provided.

Then, the upper inner eccentric bush or upper outer eccentric bush and the lower inner eccentric bush or the lower outer eccentric bush for raising and lowering the rolls are rotated in opposite directions by a required angle, respectively, so that the upper work roll and the lower work roll are rotated. To adjust the height and set the gap between the upper and lower work rolls. The upper outer eccentric bush or the upper inner eccentric bush and the lower outer eccentric bush or the lower inner eccentric bush for the roll cloth are rotated at the required angles in opposite directions, respectively, so that the upper work roll and the lower work roll are aligned with the mill center line. Cross at the required cross angle from. While driving and rotating the upper work roll and the lower work roll,
The transported rolled material is bitten into a roll gap and rolled to a required thickness.

If the thickness of the rolled material fluctuates during rolling, the upper inner eccentric bush or upper outer eccentric bush and the lower inner eccentric sleeve or lower outer eccentric sleeve are rotated by a small angle in opposite directions to each other, and The roll gap and the lower work roll are finely moved up and down to finely adjust the roll gap, and the thickness of the rolled material to be rolled is kept constant. Also, if the thickness distribution in the sheet width direction fluctuates during rolling of the rolled material, the upper outer eccentric bush or the upper inner eccentric bush and the lower outer eccentric bush or the lower inner eccentric bush are turned in opposite directions by a small angle. To finely adjust the cross angle between the upper work roll and the lower work roll to maintain a constant thickness distribution in the sheet width direction of the rolled material to be rolled.

The present invention for solving the above-mentioned problem is a roll-cross two-high rolling mill for rolling a rolled material between an upper work roll and a lower work roll which are crossed with each other. The one or both shaft ends of the upper work roll are rotatably mounted on the upper bearing block, and the one or both shaft ends of the lower work roll are connected to the lower bearing block. The upper bearing block is rotatably mounted on the shaft, and the upper bearing block is supported by an ascending and descending cross hole formed in the frame, and the lower bearing block is supported by a lower ascending and descending cross hole formed in the frame. A lifting wedge liner inclined between the upper bearing block and the raising / lowering cross hole and between the lower bearing block and the lower lifting / lowering cross hole. A work roll elevating means for adjusting a gap between the upper and lower work rolls by moving the upper and lower work rolls in the roll axis direction. The upper and lower work rolls are interposed between a cross hole and between the lower bearing block and the lower elevating cross hole, respectively, and the cross wedge liners are vertically moved in opposite directions to each other in the roll axis direction. And a work roll cloth means for performing the cross adjustment.

Then, the lower work roll is raised and lowered by the work roll lifting means via the lower bearing block, the height of the upper surface is set, and the upper work roll is raised and lowered by the work roll lifting means via the upper bearing block. Set the required roll gap between the upper work roll and the lower work roll. The upper work roll and the lower work roll are rotated in opposite directions at a required angle about the roll cross point by the upper and lower work roll cross means via the upper bearing block and the lower bearing block, respectively, about the roll cross point. Cross the roll with the required cross angle. While the upper work roll and the lower work roll are driven and rotated, the conveyed rolled material is caught in the roll gap and rolled to a required thickness.

When the thickness of the rolled material fluctuates during rolling, the upper work roll is finely raised and lowered by the work roll elevating means to finely adjust the roll gap to keep the thickness of the rolled material to be rolled constant. Further, when the thickness distribution of the rolled material in the sheet width direction fluctuates during rolling, the upper work roll and the lower work roll are finely rotated in opposite directions by the work roll crossing means to finely adjust the cross angle, The thickness distribution of the rolled material to be rolled in the sheet width direction is kept constant.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view of a main part on a working side of a roll cross two-high rolling mill according to a first embodiment of the present invention. FIG. 2 is a view taken along a line II-II in FIG. FIG. 3 shows III-II in FIG.
The arrow I is shown.

In FIG. 1 to FIG.
Both shaft ends are rotatably mounted on the upper inner eccentric bush 3 via bearings 4, and the upper inner eccentric bush 3 is rotatably supported by the upper outer eccentric bush 5. The upper outer eccentric bush 5 is rotatably mounted on the upper part of the frame 30 on the working side and the driving side, respectively. That is, the upper inner eccentric bush 3 and the upper outer eccentric bush 5 have a double structure and support the upper work roll 1. The end of the upper outer eccentric bush 5 protrudes from the frame 30, and the upper outer worm wheel 7 is fitted. An end of the upper inner eccentric bush 3 protrudes from the upper outer eccentric bush 5, and an upper inner worm wheel 6 is fitted thereto.

An upper motor 9 as first bush rotating means is connected to the upper worm 8 screwed to the upper inner worm wheel 6, and the upper motor 9 is provided with a rotation angle detector 9a. A swivel 10 is rotatably provided above the working and drive side frames 30, and the upper motor 9 is mounted on the swivel 10. The swivel 10 is rotated and biased in the counterclockwise direction in FIG.
Are pressed so as not to separate from the upper inner worm wheel 6. An upper motor 12 as a second bush rotating means is connected to the worm 8 screwed to the upper outer worm wheel 7, and the upper motor 12 is connected to the rotation angle detector 1.
2a is provided. The upper motor 12 is mounted on the upper part of the working and drive side frames 30, respectively.

Like the upper work roll 1, both shaft ends of the lower work roll 2 are rotatably mounted on lower inner eccentric bushes 13 via bearings 14, respectively, and the lower inner eccentric bushes 13 are lower outer eccentric bushes. 15 rotatably supported. The lower outer eccentric bush 15 is rotatably supported at the lower part of the working and drive side frames 30, respectively. An end of the lower outer eccentric bush 15 protrudes from the frame 30, and a lower outer worm wheel 17 is fitted thereto. An end of the lower inner eccentric bush 13 projects from the lower outer eccentric bush 15, and a lower inner worm wheel 16 is fitted thereto.

A lower motor 19 as first bush rotating means is connected to the lower worm 18 screwed to the lower inner worm wheel 16, and the lower motor 19 is connected to the rotation angle detector 1.
9a is provided. Work side and drive side frame 3
A swivel 20 is rotatably provided at the lower part of the pivot 0, and the lower motor 19 is mounted on the swivel 20. The swivel 20 is rotationally urged clockwise in FIG. 2 by a spring 21 so that the lower worm 18 is pressed so as not to separate from the lower inner worm wheel 16. Further, a lower motor 22 as second bush rotating means is connected to the worm 18 screwed to the lower outer worm wheel 17, and the lower motor 22 is provided with a rotation angle detector 12a. Lower motor 22
Are mounted below the working and drive side frames 30, respectively.

FIG. 3 shows the working side of the above-described cross roll two-high rolling mill. The driving side is also constructed in the same manner as shown in the drawing. Via a drive. The working-side and drive-side frames 30 are respectively erected on the base block 31.

The operation of the above-structured cross roll two-high rolling mill will be described with reference to FIGS. FIG. 4 shows the displacement of the roll gap, and FIG. 5 shows the displacement of the roll cross angle.

While the rotation angles of the upper motor 9 and the lower motor 19 are detected by the rotation angle detectors 9a and 19a, the upper worm 8 and the lower worm 18 are simultaneously rotated by the upper motor 9 and the lower motor 19 at a required rotation angle. 4A, the upper inner eccentric bush 3 and the lower inner eccentric bush 13 are moved through the upper inner worm wheel 6 and the lower inner worm wheel 16 from the state where the roll gap g shown in FIG. The upper work roll 1 and the lower work roll 2 are rotated up and down at an angle to adjust the height, and the roll gap g is set. As shown in FIG. 4C, when the upper inner eccentric bush 3 and the lower inner eccentric bush 13 are rotated by 180 degrees, the roll gap g becomes maximum, and as shown in FIG. Lower inner eccentric bush 13
When rotated, the roll gap g becomes intermediate.

Next, the rotation angle detectors 12a and 22a
To detect the rotation angles of the upper motor 12 and the lower motor 22
While the upper motor 12 and the lower motor 22
Arm 8 and lower worm 18 simultaneously at the required rotation angle.
The worm wheel 7 rotates in the opposite direction
As shown in FIG. 5A via the lower outer worm wheel 17.
When the cross angle θ is minimum, the upper and outer eccentric sleeves 5 and
The outer eccentric bush 15 and the direction opposite to each other at the required angle
, The axis L of the upper work roll 1 ₁And below
Axis L of work roll 2_TwoFrom the mill center line C
Cross at the loss angle θ. As shown in FIG.
The outer eccentric sleeve 5 and the lower outer eccentric bush 15
When rotated 0 degrees, the cross angle θ becomes the maximum, and as shown in FIG.
As shown, the upper outer eccentric sleeve 5 and the lower outer eccentric
When the shoe 15 is turned by 90 degrees, the cross angle θ becomes intermediate.

In this state, while the upper work roll 1 and the lower work roll 2 are rotated by a driving device (not shown), the rolled material 60 is bitten into the roll gap g and rolled to a required thickness.

When the thickness of the rolled material 60 fluctuates during rolling,
While detecting the rotation angles of the upper motor 9 and the lower motor 19 by the rotation angle detectors 9a and 19a, the upper worm 8 and the lower worm 18 are rotated by the upper motor 9 and the lower motor 19 at the required rotation angles in directions opposite to each other. Then, the upper inner eccentric bush 3 and the lower inner eccentric bush 13 are simultaneously rotated in opposite directions by a required minute angle via the upper inner worm wheel 6 and the lower inner worm wheel 16, respectively. The work roll 2 is finely moved up and down to finely adjust the roll gap, and the thickness of the rolled material 60 to be rolled is kept constant.

If the thickness distribution in the sheet width direction changes during rolling of the rolled material 60, the rotation angle detectors 12a and 22a detect the rotation angles of the upper motor 12 and the lower motor 22, respectively. The upper worm 8 and the lower worm 18 are rotated by the lower motor 22 in the directions opposite to each other at a required rotation angle, and the upper and lower eccentric sleeves 5 and the upper and lower eccentric bushes 15 are rotated via the upper and lower worm wheels 7 and 17. Are simultaneously rotated in the opposite directions at a required minute angle, and the cross angle θ of the upper work roll 1 and the lower work roll 2 is finely adjusted, and the thickness distribution of the rolled material 60 to be rolled in the sheet width direction is adjusted. Keep constant.

In the embodiment described above, the upper inner eccentric bush 3 and the lower inner eccentric bush 13 are
And the upper and lower eccentric bushes 5 and 15 are used for the roll cloth of the upper and lower work rolls 1 and 2, but the upper and lower eccentric bushes 3 and 13 Are used for the roll cloth of the upper work roll 1 and the lower work roll 2, and the upper outer eccentric bush 5 and the lower outer eccentric bush 15
May be used for raising and lowering the upper work roll 1 and the lower work roll 2. The present embodiment is applicable to any of a hot rough rolling, a finishing rolling mill, and a cold rolling mill.

A second embodiment of the present invention will be described with reference to FIG. FIG. 6 shows a schematic side view of a roll-cross two-high rolling mill according to a second embodiment of the present invention. FIG.
The same members as those of the roll cross two-high rolling mill of the first embodiment shown in FIG. 3 to FIG. 3 are denoted by the same reference numerals, and redundant description is omitted.

In FIG. 6, a lower outer left-hand worm wheel 17a is fitted to an end of the lower outer eccentric bush 15. A lower left screw worm 18a and an upper worm 8 are screwed into the lower outer left screw worm wheel 17a and the upper outer worm wheel 7, respectively.
a and the upper worm 8 are connected by a connecting shaft 28. Lower left screw worm 1 connected by connecting shaft 28
An upper motor 12 is connected to the upper worm 8 and the upper worm 8, and the upper motor 12 is provided with a rotation angle detector 12a.
Other configurations are the same as those of the first embodiment shown in FIGS.

The operation of the roll cross two-high rolling mill having the above configuration will be described. The upper motor 1 is detected by the rotation angle detector 12a.
The upper worm 8 and the lower left screw worm 18a are rotated by the upper motor 12 at the required rotation angles while detecting the rotation angle of the upper and lower worm wheels 7a and 17a. The eccentric bush 5 and the lower outer eccentric bush 15 are rotated in the directions opposite to each other at a required angle, and the upper work roll 1 is rotated.
The axis L ₁ and the axis L ₂ of the lower work roll 2 from the mill center line C to the cross at the required cross angle theta.

In this state, while the upper work roll 1 and the lower work roll 2 are rotated by a driving device (not shown), the conveyed rolled material 60 is caught in the gap between the upper and lower work rolls 1 and 2 so as to be rolled. Is rolled to the required thickness.

When the thickness distribution in the sheet width direction fluctuates during rolling of the rolled material 60, the rotation angle detector 12a detects the rotation angle of the upper motor 12 while detecting the rotation angle of the upper motor 12.
2, the upper worm 8 and the lower left screw worm 18a are rotated at required rotation angles, respectively, and the upper outer eccentric bush 5 and the upper outer eccentric bush 15 are connected via the upper outer worm wheel 7 and the lower outer left screw worm wheel 17a. At the required minute angle, they are simultaneously rotated in opposite directions to finely adjust the cross angle θ of the upper work roll 1 and the lower work roll 2 so that the thickness distribution in the sheet width direction of the rolled material 60 to be rolled is constant. Hold. Other operations are the same as those of the first embodiment.

A third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a front view of a main part of a work side of a roll cross two-high rolling mill according to a third embodiment of the present invention, FIG. 8 is a view taken along line VIII-VIII in FIG. 7, and FIG. IX
FIG. 10 is a view taken along the line IX, and FIG. 10 is a view taken along the line XX in FIG. Note that the same members as those of the roll cross two-high rolling mill of the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description is omitted.

As shown in FIGS. 7, 9 and 10, both shaft ends of the upper work roll 1 and the lower work roll 2
4 through the upper bearing block 33 and the lower bearing block 43
Each is rotatably mounted on a shaft. An upper taper liner 35 is formed on the upper surface of the upper bearing block 33 so as to be slidable in the rolling direction. The upper taper liner 35 is formed so as to be slidable in the rolling direction. Is provided slidably in the rolling direction. The upper bearing block 33 and the upper taper liner 35 are connected to the working-side and drive-side frames 5.
And a lower cross hole 5a and a lower cross hole 5
0b, and is suspended from the frame 50 by a lifting cylinder 38.
A lowering wedge liner 36 inclined at the same angle as the upper taper liner 35 in the opposite direction to the upper taper liner 35 is interposed slidably in the roll axis direction in the lifting cross hole 50a.

Lower bearing block 33 and lower taper liner 4
5 is inserted into a lower elevating cross hole 50b drilled in the working and drive side frames 50, and the lower taper liner 45 and the lower elevating cross hole 50b are inclined in the opposite direction at the same angle as the lower taper liner 45. The wedge liner 46 for raising and lowering is interposed slidably in the roll axis direction.
The rod portion of the screw-down cylinder 37 having the rod position detector 37a embedded in the upper portion of the frame 50 is fixed to the upwardly projecting portion of the screw-down wedge liner 36. The rod portion of the height adjusting cylinder 47 having the rod position detector 47a embedded in the lower part of the frame 50 is fixed.

As shown in FIGS. 8, 9 and 10, on both side surfaces of the upper bearing block 33 and the lower bearing block 43,
A curved taper liner 55 having a curved surface and an inclination formed in the rolling direction in the roll axis direction is provided so as to slide in the rolling direction, and the curved taper liner 55 and the hole 50a for the ascending / descending cross and the hole 50b for the lower elevating / closing cross are provided. The cross wedge liners 56, which are inclined at the same angle as the curved taper liners 55 in the direction opposite to the roll axis direction, are interposed slidably in the roll axis direction. A rod portion of a cross cylinder 57 having a rod position detector 57a buried in the center of the frame 50 is fixed to a protrusion in the rolling direction of each cross wedge liner 56.

Incidentally, instead of the lifting cylinder 38,
A taper liner, a rising wedge liner and a lifting cylinder similar to the lower surface of the lower bearing block 43 may be provided on the lower surface of the upper bearing block 33.

FIGS. 6, 7 and 8 show the working side of the cross roll two-high rolling mill. The driving side is also constructed in the same manner as shown, and the drive side shaft ends of the upper work roll 1 and the lower work roll 2 are shown. Is connected to a driving device via a universal joint (not shown). The working-side and drive-side frames 50 are respectively erected on the base block 51.

The operation of the above-structured cross roll two-high rolling mill will be described. While detecting the rod stroke of the height adjusting cylinder 47 by the rod position detector 47a, the height adjusting cylinder 47 slides the lifting / lowering wedge liner 46 to move the lower bearing block 43 up and down so that the upper surface of the lower work roll 2 Set the height. Then, while detecting the rod stroke of the screw down cylinder 37 by the rod position detector 37a, the screw down wedge liner 36 is slid by the screw down cylinder 37, and the upper bearing block 33 constantly lifted by the lifting cylinder 38 is moved up and down. A required roll gap between the upper work roll 1 and the lower work roll 2 is set.

Next, while detecting the rod strokes of the upper and lower cross cylinders 57 by the rod position detector 57a, the upper and lower cross wedge liners 56 are moved by the respective cross cylinders 57 in the roll axis direction. , And the upper and lower cross wedge liners 56 are slid toward the shaft end in the roll axis direction, so that the upper bearing block 33, the upper work roll 1, the lower bearing block 43, and the lower. rotates at a predetermined angle and the work roll 2 about the roll cross point, the upper axis L ₁ of the work rolls _1, and under the work required cross angle the axis L ₂ from the center line C of the roll 2 theta Cross. In this state, while the upper work roll 1 and the lower work roll 2 are rotated by a drive device (not shown), the conveyed rolled material 60 is engaged with the roll gap and rolled to a required thickness.

When the thickness of the rolled material 60 fluctuates during rolling, the rod position detector 37a detects the reduction cylinder 37.
While detecting the rod stroke of
Is operated at the required stroke to reduce the wedge liner 3
6 is finely slid, the upper work roll 1 is finely moved up and down through the upper bearing block 33 to finely adjust the roll gap, and the thickness of the rolled material 60 is kept constant.

When the thickness distribution in the sheet width direction fluctuates during rolling of the rolled material 60, each of the cross cylinders 57 is required while detecting the rod stroke of the upper and lower cross cylinders 57 by the rod position detector 57a. , And the upper and lower cross wedge liners 56 are finely slid in opposite directions to each other to move the upper work roll 1 and the upper work roll 1 together. The cross angle θ with the lower work roll 2 is finely adjusted to keep the thickness distribution of the rolled material 60 to be rolled constant in the sheet width direction.

This embodiment can be applied to any of a hot rough rolling, a finishing rolling mill, and a cold rolling mill.

In the above-described embodiment, a cross mechanism such as an eccentric bush or a cross wedge liner is provided at both ends of the upper work roll 1 and the lower work roll 2, and the upper work roll 1 and the lower work roll 2 are connected to the center axis of the mill. Although the crossing mechanism as the center of rotation has been described as an example, the present invention is not limited to the above embodiment. For example, one shaft end of the upper work roll 1 and the lower work roll 2 is supported by an eccentric bush, and the upper work roll 1 and the lower work roll 2 are supported.
The other shaft end of is supported by a cross wedge liner,
It is also possible to adopt such a mechanism. It is also possible to adopt a so-called single-cross mechanism that crosses one of the upper work roll 1 and the lower work roll 2.

For example, as shown in FIG. 11 (a), one or the other of the cross mechanisms in each of the above-described embodiments is arranged so that the center line of the work roll is slightly offset from the center line of the mill toward the sheet exit side. The shaft ends of one (right side) of the lower work roll 2 and the other (left side) of the upper work roll 1 are rotatably supported at the O position in the frame 30 (50). The other (left) shaft end moves horizontally to the plate entry side with the O position of the (right) rotation center as the center of rotation, and one (right) of the other (left) O position of the upper work roll 1 as the rotation center. By moving the shaft end side to the plate entry side in the horizontal direction, the cross point of the upper and lower work rolls 1 and 2 may be positioned on the mill center line as shown in FIG. 11B. Good.

When the center line of the work roll is offset to the sheet entry side, the horizontal movement direction of the upper and lower work rolls 1 and 2 is reversed (plate exit side). Thus, the cross point is always located on the mill center line. In addition, by setting or changing the offset amount to a predetermined value, the cross point always becomes the multi-use cross angle position at the time of operation or always the maximum load point position, which is preferable in design. By using a one-sided cloth, the number of crossing devices is halved, the equipment is simplified and maintenance is reduced, and further, the connection with other devices such as a foundation and a roll changing device is facilitated.

[0050]

According to the roll cross two-high rolling mill of the present invention,
An inner eccentric bush is provided at the shaft end of the upper work roll and the lower work roll, and an inner eccentric bush for a roll elevating or roll cross rotating at a required angle and an outer eccentric bush for a roll cross or a roll elevating. Since the upper work roll and the lower work roll are supported on the frame via the outer eccentric bush and the inner eccentric bush, the roll gap and the roll cross angle can be adjusted by rotating the inner eccentric bush and the outer eccentric bush at required angles. . As a result, the structure can be simplified, and a large-sized housing is not required, so that the structure can be made compact and the manufacturing cost and the maintenance cost of the rolling mill can be reduced.

Also, the bush rotating means is decelerated to rotate the inner eccentric bush and the outer eccentric bush so as to adjust the roll gap and the roll cross angle.
The power of the bush rotating means can be reduced, and the accuracy of the operation control is reduced. Furthermore, when a plurality of two-high rolling mills that do not require the housing of the present invention are arranged in tandem, the distance between the respective work rolls can be minimized. Therefore, when the rolled material passes through the work roll of the preceding rolling mill, the non-tension portion is shortened, so that the meandering of the rolled material in tension controlled rolling can be reduced, and the temperature of the rolled material is prevented from lowering. It is possible to reduce both scale generation and the line length.

In the roll cross two-high rolling mill according to the present invention, the shaft ends of the upper work roll and the lower work roll are supported by the upper and lower bearing blocks via the upper and lower bearing blocks by the upper and lower bearing block elevating cross holes formed in both frames. Since the roll elevating means and the roll cross means are interposed between the upper and lower bearing blocks and the frame, the roll gap and the roll cross angle can be adjusted by operating the roll elevating means and the roll cross means. As a result, the structure can be simplified, and a large-sized housing is not required, so that the structure can be made compact and the manufacturing cost and the maintenance cost of the rolling mill can be reduced.

Further, since the lifting / lowering wedge liner and the cross wedge liner are moved in the roll axis direction with a large stroke, and the speed is reduced to adjust the roll gap and the roll cross angle, the power of the roll lifting means and the roll cross means is reduced. And the accuracy of the operation control is reduced. Further, when a plurality of two-high rolling mills that do not require the housing are arranged in tandem, the distance between the respective work rolls can be minimized. Therefore, when the rolled material passes through the work roll of the preceding rolling mill, the non-tension portion is shortened, so that the meandering of the rolled material in tension controlled rolling can be reduced, and the temperature of the rolled material is prevented from lowering. It is possible to reduce both scale generation and the line length.

[Brief description of the drawings]

FIG. 1 shows a roll cloth 2 according to a first embodiment of the present invention.
The front view showing the principal part of the working side of a tandem rolling mill.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a view taken along the line III-III in FIG. 1;

FIG. 4 is an explanatory view of displacement of a roll gap.

FIG. 5 is an explanatory view of displacement of a cross angle.

FIG. 6 shows a roll cloth 2 according to a second embodiment of the present invention.
FIG. 1 is a schematic side view of a step rolling mill.

FIG. 7 shows a roll cloth 2 according to a third embodiment of the present invention.
The front view showing the principal part of the working side of a tandem rolling mill.

FIG. 8 is a view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a view taken along line IX-IX in FIG. 7;

FIG. 10 is a view taken along line XX in FIG. 7;

FIG. 11 is a plan view illustrating an arrangement state of work rolls.

FIG. 12 is a side view of a conventional roll cross two-high rolling mill.

[Explanation of symbols]

 Reference Signs List 1 upper work roll 2 lower work roll 3 upper inner eccentric bush 5 upper outer eccentric bush 6 upper inner worm wheel 7 upper outer worm wheel 8 upper worm 9, 12 upper motor 13 lower inner eccentric bush 15 lower outer eccentric bush 16 lower inner worm Wheel 17 Lower outer worm wheel 17a Lower outer left screw worm wheel 18 Lower worm 18a Lower left screw worm 19.22 Lower motor 30.50 Frame 33 Upper bearing block 35 Upper taper liner 36 Reduction wedge liner 37 Reduction cylinder 43 Lower bearing block 45 Lower taper liner 46 Elevating wedge liner 47 Height adjusting cylinder 50a Elevating cross hole 50b Lower elevating cross hole 55 Curved taper liner 56 Cross wedge liner 60 Rolled material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaji Yoshikawa 4-2-2 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima In the Hiroshima Research Laboratory of Mitsubishi Heavy Industries, Ltd.

Claims (2)

[Claims] 1. A roll-cross two-high rolling mill for rolling by passing a rolled material between an upper work roll and a lower work roll crossed to each other, wherein one of the shaft ends of the upper work roll or Both shaft ends are rotatably supported on the upper inner eccentric bush via bearings, and one shaft end or both shaft ends of the lower work roll are rotatable on the lower inner eccentric bush via bearings. Supporting, the upper inner eccentric bush and the lower inner eccentric bush are rotatably supported by the upper outer eccentric bush and the lower outer eccentric bush, respectively.
The upper outer eccentric bush and the lower inner eccentric bush are rotatably supported on a frame, and the upper inner eccentric bush and the lower inner are used to adjust a gap between the upper and lower work rolls or a cross adjustment of the upper and lower work rolls. First bush rotating means for rotating the eccentric bush is provided, and the upper outer eccentric bush and the lower outer eccentric bush are rotated to perform cross adjustment of the upper and lower work rolls or gap adjustment between the upper and lower work rolls. A roll cross two-high rolling mill provided with a second bush rotating means for causing the rolling. 2. A roll cross two-high rolling mill for rolling by passing a rolled material between an upper work roll and a lower work roll crossed to each other, wherein one of the shaft ends of the upper work roll or Both ends of the two shafts are rotatably mounted on the upper bearing block, and one shaft end or both ends of the lower work roll are rotatably mounted on the lower bearing block. The lower bearing block is supported by the lower lifting cross hole drilled in the frame and the lifting wedge liner inclined in the vertical direction in the roll axis direction is supported by the lifting bearing cross hole drilled in the upper bearing block. The upper and lower wedge liners are interposed between the raising and lowering cross holes and between the lower bearing block and the lower raising and lowering cross holes, respectively, by moving the raising and lowering wedge liners in the roll axis direction. Work roll elevating means for adjusting the gap between the lower work rolls, the cross wedge liner inclined in the passing direction of the roll axis direction between the upper bearing block and the ascending and descending cross hole and the lower bearing block. Interposed between the lower lifting cross hole, respectively,
A roll cloth two-stage rolling mill, comprising: work roll cloth means for performing cross adjustment of the upper and lower work rolls by moving the cloth wedge liners vertically in the roll axis direction in mutually opposite directions.