JPH0631307A - Horizontal rolling mill - Google Patents

Abstract

(57) [Abstract] [Purpose] A horizontal rolling mill that crosses only the work rolls that can stably support the thrust force generated by the roll cross with a simple mechanism and can realize highly accurate shape control. To provide. [Structure] Only upper and lower work rolls 11 and 12 are crossed, and a support plate 22 is rotatably attached by a pin 23 perpendicular to a roll chock 16 of the work roll 11 where a thrust force is generated by the roll cross, and thrust supports of these support plates 22 are received. Both sides of the portion 24 are sandwiched by wheels 29 of a support block 26 attached to the housing 17 so as to receive a thrust force. Even if the work rolls 11 and 12 are crossed, the support plate 22 is always parallel to the plate traveling direction L, and the thrust force is supported in a stable state by a simple mechanism. Then, since the thrust forces generated by the roll cloth are approximately equal in magnitude and opposite in direction, the roll chocks that can cancel the thrust force are mechanically connected. This offsets most of the generated thrust force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal rolling mill that crosses only upper and lower work rolls, and is capable of stably receiving the thrust force generated by the work roll cross with a simple mechanism.

[0002]

2. Description of the Related Art One of the methods for controlling the cross-sectional shape of a rolled product with high accuracy is to change the clearance distribution between rolls by slightly crossing the upper and lower work rolls in the horizontal plane with respect to the direction perpendicular to the plate traveling. It has been put to practical use as a so-called cross mill.

In this cross mill, the rotating shafts of the upper and lower work rolls are slightly crossed with each other in the horizontal direction in the horizontal plane.

When such a cross mill is constructed as, for example, a four-high rolling mill, when only the upper and lower work rolls are crossed and the upper and lower work rolls supporting the work rolls are rolled without being crossed, Thrust force due to the roll cloth is generated between the work roll and the rolled material and between the work roll and the backing roll, and the thrust force generated between the work roll and the rolled material sandwiches the rolled material. Although it is almost offset between the upper and lower work rolls and the value itself becomes small, a large thrust force remains between the work roll and the backing roll.

Therefore, in the conventional cross mills, in order to eliminate the generation of the thrust force between the upper and lower work rolls and the upper and lower holding rolls supporting the upper and lower work rolls, these upper and lower holding rolls are made parallel to the rotation axis of the work rolls. It has been put to practical use as a pair cross mill that allows the same angle to cross, and the thrust receiving mechanism is provided only on the upper and lower work rolls. (Japanese Patent Laid-Open No. 45583/1985, Japanese Patent Publication 58/1985)
No. 23161, Japanese Patent Publication No. 19361/1987) As a thrust receiving mechanism for receiving the thrust force generated by this work roll, for example, one of the work rolls 1 is shown as shown in FIG. Before and after the roll advancing direction L of the roll chock 2, the plate advancing direction L
A wheel 3 having a rotating shaft parallel to the roller 3 is mounted via a rolling bearing 4, and a side surface of the housing 5 and a chock clamp plate 7 that is movable by a chock clamp cylinder 6.
The thrust force is supported by rolling the wheels 3 between and, and the work roll 1 is moved up and down via the wheels 3 to enable smooth plate thickness control (AGC). In the figure, 8 is a cross mechanism.

[0006]

However, in order to realize a cross mill, if a pair cross mill that crosses the upper and lower work rolls as well as the upper and lower work rolls is crossed, a cross mechanism for crossing the work rolls is required, and compared with the work rolls. There is a problem that the mechanism becomes large because it is large.

Therefore, if a work roll cross mill that crosses only the upper and lower work rolls is used, the cross mechanism can be simplified, and the shape control of the rolled product can be performed with higher accuracy as compared with the pair cross mill. The thrust force as described above is also generated in the auxiliary roll, and a thrust receiving mechanism for receiving this is required.

Further, in the thrust receiving mechanism used in the conventional paired cross mill, the thrust force can be supported by the wheel and the housing or the chock clamp plate. However, there is also a problem that it is not in line contact with the housing or the chock clamp plate, and only a part thereof comes into point contact, so that it is not possible to stably support the thrust force.

The present invention has been made in view of the above problems of the prior art, and it is possible to stably support the thrust force generated by the roll cloth with a simple mechanism.
An object of the present invention is to provide a horizontal rolling mill capable of crossing only work rolls capable of achieving highly accurate shape control.

[0010]

In order to solve the problems of the above-mentioned prior art, a horizontal rolling mill of the present invention is provided with at least four rolls, and only upper and lower work rolls cross in the horizontal direction in the horizontal direction of the plate. In the horizontal rolling mill, a wheel supporting the above work roll and a roll chock of one of the rolls in contact with the work roll is provided with a thrust support plate rotatable about a vertical axis, and a wheel rolling along both sides of the support plate to receive a thrust force. The support block provided with is provided slidably along the outer surface of the housing.

Further, the horizontal rolling mill of the present invention is a horizontal rolling mill having at least four rolls, in which only the upper and lower work rolls cross in the horizontal plane with respect to the direction perpendicular to the plate traveling direction, and the work rolls and the rolls in contact therewith. Mechanically connecting one roll chock of which the thrust forces in the opposite directions are generated with substantially the same size, and at least one of the connected roll chock is provided with a thrust support plate rotatable about a vertical axis, A support block provided with wheels that roll along both sides of the support plate and receive thrust force is provided slidably along the outer surface of the housing.

Further, the horizontal rolling mill of the present invention is a horizontal rolling mill having at least four rolls, in which only the upper and lower work rolls are crossed in the horizontal plane with respect to the direction perpendicular to the plate traveling direction. Is characterized in that one roll chock is mechanically connected to the other roll chocks that generate thrust forces in opposite directions with substantially the same magnitude.

[0013]

According to this horizontal rolling mill, a work roll cross mill that crosses only the upper and lower work rolls is used, and the support plate is rotated by a pin or the like perpendicular to the roll chock of one of the work roll and the backing roll that generates thrust force by the roll cross. These support plates are movably mounted and both sides of these support plates are sandwiched by the wheels of the support block mounted on the housing to receive the thrust force, so that the support plates are always parallel to the plate traveling direction even if the work rolls are crossed. The simple mechanism allows the thrust force to be supported in a stable state.

Further, according to this horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is used, and the thrust force generated by the roll cross is substantially equal in size between the upper and lower work rolls and the upper and lower work rolls. Since it is in the opposite direction, as a roll chok that can offset the thrust force, the upper work roll and the upper holding roll and the lower work roll and the lower holding roll, or the upper and lower work rolls and the upper and lower holding rolls are mechanically connected, At least one of the two connected roll chocks is provided with the thrust receiving mechanism having the same structure as in the first aspect of the invention, so that most of the generated thrust force is canceled out, and even if there is a slight remaining thrust force, these can be simplified. It is designed so that it can be supported in a stable state by various mechanisms.

Further, according to this horizontal rolling mill, a work roll cross mill is provided in which only the upper and lower work rolls are crossed, and the thrust force generated by the roll cross is substantially equal in size between the upper and lower work rolls and the upper and lower holding rolls. Since it is in the opposite direction, the upper work roll and the upper backing roll, the lower work roll and the lower backing roll, or the upper and lower work rolls and the upper and lower backing rolls should be mechanically connected as roll chocks that can offset the thrust force. The generated thrust force is completely offset so that the thrust force can be supported by a simple mechanism.

[0016]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic horizontal sectional view showing only an upper work roll portion according to an embodiment of a horizontal rolling mill of the present invention.

The horizontal rolling mill 10 is composed of a four-high rolling mill as shown in FIG.
1, 12 and upper and lower holding rolls 13 and 14, and only the upper and lower work rolls 11 and 12 in contact with the rolled plate W are configured as a work roll cross mill capable of roll crossing.

These upper and lower work rolls 11 and 12 are
The same cross mechanism is provided for each, but here, the cross mechanism 15 of the upper work roll 11 shown in FIG. 1 will be described as an example.

In the cross mechanism 15, the plate advancing direction L is provided on the side surface of the work roll chock 16 which supports both ends of the upper work roll 11 and faces the housing 17.
A cross cylinder 18 is formed by opening in the front and rear of the housing, and the tips of the rods 19 connected to the pistons are brought into contact with the inside surface of the window of the housing 17, respectively. The amount of extrusion by the rod 19 is adjusted by supplying and discharging the above so that the rotation axis of the upper work roll 11 can be slightly crossed with the direction perpendicular to the plate traveling direction L.

By providing the cross cylinder 18 which is built in the roll chock 16 side and constitutes the cross mechanism 15, it is not necessary to process the housing 17 and the cross mechanism 15 can be easily manufactured. In addition, even when the existing rolling mill is modified into a cross mill, it can be easily dealt with by modifying only the roll chock 16.

Next, the thrust receiving mechanism of the horizontal rolling mill 10 will be described. The upper and lower work rolls 11 and 12
Since the upper and lower holding rolls 13 and 14 have the same structure, the case of the upper work roll shown in FIG. 1 will be described.

The thrust receiving mechanism 2 of this horizontal rolling mill 10
0 is one of the upper work roll chocks 16 provided to support both ends of the upper work roll 11 (the left work roll chock in FIG. 1) 1
Equipped to 6.

The plate traveling direction L of the work roll chock 16
Brackets 21 are attached by bolts or the like at two upper and lower positions in the plate advancing direction L on the outside in the direction perpendicular to and the center of a support plate 22 that receives a thrust force between these two brackets 21 is attached by a vertical pin 23. It is designed to rotate about a vertical axis. Both ends of the support plate 22 protrude forward and backward in the plate traveling direction L, and a plate-shaped thrust receiving portion 24 is formed.
Are formed.

On the other hand, in order to support the thrust force by sandwiching both sides of these two thrust receiving portions 24, a guide groove 25 extending horizontally along the plate advancing direction L is formed outside the housing 17 and the support block 26 slides. The support cylinder 27 is mounted so that it can be reciprocally operated.

Wheels 28 are mounted in the support block 26 at intervals slightly wider than the thickness of the thrust receiving portion 24, on both sides of which the rotary shafts are arranged parallel to the plate traveling direction L.

Therefore, by advancing the support block 26 by the support cylinder 27 and arranging the wheels 28 so as to sandwich both sides of the thrust receiving portion 24,
The thrust force generated by the roll cloth is applied to the support plate 22.
It can be supported by the wheel 28 via the thrust receiving portion 24.

Even when the cross angle of the work roll 11 is changed, since the support plate 22 is rotatably mounted by the vertical pin 23, the thrust receiving portion 24 is always in parallel with the plate advancing direction L. Can keep and completely wheel 2
8 can be brought into contact with each other to receive a thrust force in a stable state.

Therefore, such a thrust receiving mechanism 2
0 for the upper and lower work rolls 11 and 12 and the upper and lower work rolls 1
Horizontal rolling mill 1 provided on one of the roll chocks 3 and 14
At 0, the thrust force generated by the work roll cloth can be completely supported, and a simple work roll cross mill of the thrust receiving mechanism 20 can be realized.

Next, another embodiment of the present invention will be described in detail with reference to FIG. 2. The same parts as those of the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this horizontal rolling mill 30, the thrust receiving mechanism for the upper and lower work rolls 11 and 12 and the upper and lower work rolls 13 and 14 associated with the work roll cloth is further simplified.

As shown in FIG. 4, the thrust force generated in the work roll cloth four-high rolling mill is equal in size between the upper and lower work rolls 11 and 12 that sandwich the rolled material W, and the directions Fw and Fw are opposite to each other. And the sizes are equal between the work roll and the backup roll, and Fb and Fb are in the opposite directions.

Therefore, it is the horizontal rolling mill 30 that utilizes thrust forces of the same magnitude and opposite directions to act on each other to cancel each other, thereby reducing the thrust force.

In this horizontal rolling mill 30, above and below one outer side of the work roll chock 16 of the upper and lower work rolls 11 and 12, like the thrust receiving mechanism 20, a bracket 31 is provided.
And the brackets 33 are provided above and below the roll chock 32 of the upper and lower holding rolls 13 and 14, respectively. And the bracket 3 integrated with the roll chocks 16 and 32 of the upper work roll 11 and the upper holding roll 13.
1, 33 comrades are mechanically connected by a connecting pin 34,
Similarly, brackets 31 and 33 that are integral with the roll chocks 16 and 32 of the lower work roll 12 and the lower backing roll 14 are mechanically connected by a connecting pin 35.

Therefore, the thrust forces Fb, Fb acting between the upper work roll 11 and the upper holding roll 13 are offset, and the thrust force F acting on the upper work roll 11 is cancelled.
Only w remains. Similarly, the thrust forces Fb, Fb acting between the lower work roll 12 and the lower holding roll 14 are also canceled out, and the thrust force Fw acting on the lower work roll 12 is cancelled.
Remains. The thrust forces Fw and Fw applied to the upper and lower work rolls 11 and 12 are opposite to each other and have the same magnitude.
Moreover, since they are in contact with each other via the rolled material W, they act so as to cancel each other, and these values themselves are considerably small.

As the thrust receiving mechanism for supporting the small thrust forces Fw, Fw, the roll chock 16 of the upper work roll 11 or the roll chock 32 of the upper holding roll 13 to which the thrust receiving mechanism 20 described above is connected.
Of the lower work roll 12 or the roll chock 32 of the lower backing roll 14 which is also connected to the lower side, and the connecting pins 34, 35 of the thrust receiving mechanism 20. It is also used as 23.

According to such a horizontal rolling mill 30, the thrust force generated by the work roll cloth can be offset between the work rolls 11 and 12 and the backing rolls 13 and 14, and the thrust force is applied to each roll. The thrust force can be completely supported by the two thrust receiving mechanisms 20 for the four rolls without providing the receiving mechanism 20.

As a result, the thrust force can be received with a simple structure, and a work roll cross mill can be realized.

Next, still another embodiment of the horizontal rolling mill of the present invention will be described with reference to FIG. 3. The same parts as those of the previous embodiments are designated by the same reference numerals and the description thereof will be omitted.

In this horizontal rolling mill 40, as shown in FIG. 3, the roll chock to be connected when the thrust force generated by the roll cloth is canceled by the connection of the roll chock is different from that in FIG.

In this horizontal rolling mill 40, the upper and lower work roll chocks 16 are provided with short brackets 41, the brackets 41 are connected by connecting pins 42, and the upper and lower holding roll chocks 32 are provided with long brackets 43. These long brackets 43 are connected by a connecting pin 44.

The upper and lower work roll chocks 16
One of them is provided with the same one as the thrust receiving mechanism 20 described in FIG. 1, and the connecting pin 42 is also used as the pin 23. Further, one of the roll chocks 32 of the upper and lower holding rolls 13 and 14 is provided with the same one as the thrust receiving mechanism 20 described in FIG. 1 by using the bracket 43. In this case, the pin 23 is different. ing.

According to such a horizontal rolling mill 40, among the thrust forces generated by the work roll cloth, the space between the upper and lower work rolls 11 and 12 and the upper and lower work rolls 13,
It is possible to cancel each other among the four rolls 14, and it is possible to completely support the thrust force by the two thrust receiving mechanisms 20 for four rolls without providing the thrust receiving mechanism 20 for each roll.

As a result, the thrust force can be received with a simple structure, and a work roll cross mill can be realized.

In the above horizontal rolling mills 30 and 40, 4
Two of the two rolls are connected with a connecting pin to cancel the thrust force, and at least one of the two connected roll chocks is equipped with a thrust receiving mechanism, but the thrust force can be completely canceled. In this case, the thrust receiving mechanism may be omitted, and a work roll cross mill having a simpler structure can be realized.

In each of the above embodiments, the horizontal rolling mill has four
Although it has been described that it is configured by a multi-high rolling mill, it may be configured by a six-high rolling mill or the like.

Further, the present invention is not limited to the above-mentioned embodiment, and each constituent element may be modified within a range not changing the gist of the invention.

[0047]

As described above in detail with the embodiments, according to the horizontal rolling mill of the present invention, a work roll cross mill that crosses only the upper and lower work rolls, and the work rolls that generate thrust force by the roll cross, The support plate is rotatably attached to one roll chock of the backup roll with a vertical pin, etc., and both sides of these support plates are sandwiched by the wheels of the support block attached to the housing to receive the thrust force. Even if they cross, the supporting plate is always parallel to the plate advancing direction, and the thrust force can be supported in a stable state by a simple mechanism.

Further, according to this horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is used, and the thrust force generated by the roll cross is substantially equal in size between the upper and lower work rolls and the upper and lower holding rolls. Since it is in the opposite direction, as a roll chok that can offset the thrust force, the upper work roll and the upper holding roll and the lower work roll and the lower holding roll, or the upper and lower work rolls and the upper and lower holding rolls are mechanically connected, Since at least one of the two connected roll chocks is provided with the thrust receiving mechanism having the same structure as in the first aspect of the invention, most of the generated thrust force is offset, and even if there is a slight remaining thrust force, these can be simplified. It can be supported in a stable state by various mechanisms.

Further, according to this horizontal rolling mill, a work roll cross mill is provided for crossing only the upper and lower work rolls, and the thrust force generated by the roll cross is substantially equal in size between the upper and lower work rolls and the upper and lower work rolls. Since it is in the opposite direction, the upper work roll and the upper backing roll, the lower work roll and the lower backing roll, or the upper and lower work rolls and the upper and lower backing rolls should be mechanically connected as roll chocks that can offset the thrust force. Since the generated thrust force is completely offset, the thrust force can be supported by a simple mechanism.

As a result, it is possible to realize a work roll cross mill having a higher plate crown control capability than the conventional pair cross mill.

[Brief description of drawings]

FIG. 1 is a schematic horizontal sectional view showing only an upper work roll portion according to an embodiment of a horizontal rolling mill of the present invention.

FIG. 2 is a partial front view of a roll end portion according to an embodiment of the horizontal rolling mill of the present invention.

FIG. 3 is a schematic horizontal sectional view showing only an upper work roll portion and a partial front view of a roll end portion according to another embodiment of the horizontal rolling mill of the present invention.

FIG. 4 is a schematic perspective view of a roll arrangement of an example of a horizontal rolling mill to which the present invention is applied.

FIG. 5 is a plan view of a conventional roll cloth mechanism and thrust receiving mechanism.

[Explanation of symbols]

 10, 30, 40 Horizontal rolling mill 11, 12 Upper and lower work rolls 13, 14 Upper and lower holding rolls 15 Cross mechanism 16 Work roll chock 17 Housing 18 Cross cylinder 19 Rod 20 Thrust receiving mechanism 21 Bracket 22 Support plate 23 Pin (vertical axis) 24 Thrust receiving portion 25 Guide groove 26 Support block 27 Support cylinder 28 Wheel 31 Bracket 32 Preserving roll chock 33 Bracket 34 Connecting pin 35 Connecting pin 41 Bracket 42 Connecting pin 43 Bracket 44 Connecting pin L Plate advancing direction W Rolling plate Fw, Fw, Fb, Fb thrust force

Claims (3)

[Claims] 1. A horizontal rolling mill having at least four rolls, in which only upper and lower work rolls are crossed in a horizontal plane with respect to a direction perpendicular to the plate traveling direction, in the work roll and one roll chock of the roll in contact with the work roll having a vertical axis. A rotatable thrust support plate is provided on the support plate, and a support block provided with wheels that roll along both sides of the support plate to receive the thrust force is provided slidably along the outer surface of the housing. Horizontal rolling machine. 2. A horizontal rolling mill having at least four rolls, in which only upper and lower work rolls are crossed in a horizontal plane with respect to a direction perpendicular to the plate traveling direction, and the work rolls and rolls in contact with the work rolls have substantially the same size and are reversed. One roll chock that generates thrust force in the direction is mechanically connected, and at least one of the connected roll chock is provided with a thrust support plate that is rotatable around a vertical axis, and along both sides of this support plate. A horizontal rolling mill characterized in that a support block provided with wheels that roll and receive thrust force is provided slidably along the outer surface of the housing. 3. A horizontal rolling mill having at least four rolls, in which only upper and lower work rolls are crossed in a horizontal plane with respect to a direction perpendicular to the plate traveling direction, and the work rolls and the rolls in contact with the work rolls have substantially the same size and are reversed. Horizontal rolling mill characterized by mechanically connecting two roll chocks that generate thrust force in one direction.