JP3067401B2 - Horizontal rolling mill - Google Patents

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 a thrust force generated by a 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 distribution of the clearance between the rolls by slightly crossing the upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to the plate advancing. Practical as a so-called cross mill.

In this cross mill, the rotation axes of the upper and lower work rolls are slightly crossed in a horizontal plane with respect to a direction perpendicular to the plate advance.

When such a cross mill is configured as, for example, a four-high rolling mill, when only the upper and lower work rolls are crossed, and the upper and lower holding rolls supporting the work rolls are not crossed and rolled as they are, A thrust force due to the roll cross is generated between the work roll and the rolled material and between the work roll and the holding roll, and the thrust force generated between the work roll and the rolled material sandwiches the rolled material. The upper and lower work rolls substantially cancel each other, and the value itself becomes small, but a large thrust force remains between the work roll and the standby roll.

Therefore, in the conventional cross mill, in order to eliminate the generation of thrust force between the upper and lower work rolls and the upper and lower holding rolls supporting the same, the upper and lower holding rolls are set so as to be parallel to the rotation axis of the work roll. It has been put into practical use as a pair cross mill that crosses at the same angle, and a thrust receiving mechanism is provided only on the upper and lower work rolls. (Japanese Unexamined Patent Publication No. 55558/55, Japanese Patent Publication No. 58
No. 23161, Japanese Patent Publication No. 19361/1987) As a thrust receiving mechanism for receiving a thrust force generated by this work roll, for example, one of the work rolls 1 shown in FIG. Of the roll chock 2 before and after the plate traveling direction L
A wheel 3 having a rotating shaft parallel to the shaft 3 is mounted via a rolling bearing 4, and a side surface of a housing 5 and a chock clamp plate 7 movable by a chock clamp cylinder 6.
Rolling the wheel 3 between the two supports the thrust force and moves the work roll 1 up and down via the wheel 3 so that the thickness control (AGC) can be smoothly performed. In the drawing, reference numeral 8 denotes a cross mechanism.

[0006]

However, if a pair cross mill for crossing the upper and lower work rolls in addition to the upper and lower work rolls in order to realize the cross mill is required, a cross mechanism for crossing the remaining rolls is required. There is a problem that it is a large-scale mechanism because of its large size.

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 precision as compared with the pair cross mill. The above-mentioned thrust force is also generated in the copy roll, and a thrust receiving mechanism for receiving the thrust force is required.

In the thrust receiving mechanism used in the conventional pair cross mill, the thrust force can be supported by the wheel and the housing or the choke clamp plate. Is not in line contact with the housing or the choke clamp plate, but only in a part thereof in point contact, so that there is a problem that the thrust force cannot be stably supported.

The present invention has been made in view of the problems of the prior art, and can stably support a thrust force generated by a roll cloth with a simple mechanism.
It is an object of the present invention to provide a horizontal rolling mill that crosses only work rolls capable of realizing highly accurate shape control.

[0010]

In order to solve the problems of the prior art, a horizontal rolling mill according to the present invention is provided with at least four rolls, and only crosses upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to the plate advance. In the horizontal rolling mill, a thrust support plate rotatable around a vertical axis is provided on the work roll and one of the roll chocks in contact with the work roll, and a wheel that receives a thrust force by rolling along both surfaces of the support plate The support block provided with is provided so as to be slidable along the outer surface of the housing.

A horizontal rolling mill according to the present invention is a horizontal rolling mill which has at least four rolls and crosses only upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to the plate advance. Mechanically connecting one roll chock that generates a thrust force in the opposite direction with substantially the same size, and providing a thrust support plate rotatable around a vertical axis to at least one of the connected roll chocks, A support block provided with wheels that receive thrust force by rolling along both surfaces of the support plate is slidably provided along the outer surface of the housing.

Further, a horizontal rolling mill according to the present invention is a horizontal rolling mill having at least four rolls, in which only upper and lower work rolls cross in a horizontal plane in a direction perpendicular to the plate advance. The other roll chocks are mechanically connected to each other in which the thrust force in the opposite direction is generated at 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 that is perpendicular to one of the roll chocks of the work roll and the holding roll, in which a thrust force is generated by the roll cross. The support plate is movably mounted so that both sides of the support plate are held between the wheels of the support block mounted on the housing to receive the thrust force. Even if the work rolls are crossed, the support plate is always parallel to the plate traveling direction. The thrust force can be stably supported by a simple mechanism.

According to this horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is provided, and the thrust force generated by the roll cross is substantially equal between the upper and lower work rolls and the upper and lower rolls. Since they are in the opposite direction, the upper work roll and the upper work roll and the lower work roll and the lower work roll, or between the upper and lower work rolls and between the upper and lower work rolls are mechanically connected as roll chalks that can offset the thrust force, At least one of the two connected roll chocks is provided with a thrust receiving mechanism having the same configuration as that of the first invention, so that most of the generated thrust force is offset, and even if there is a slight remaining thrust force, these can be easily reduced. It can be supported in a stable state by a simple mechanism.

Further, according to the horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is provided, and the thrust force generated by the roll cross is substantially equal between the upper and lower work rolls and the upper and lower rolls. Are opposite, so that the upper work roll and the upper work roll and the lower work roll and the lower work roll, or between the upper and lower work rolls and between the upper and lower work rolls are mechanically connected as roll chocks that can cancel the thrust force. Thus, the generated thrust force is completely canceled so that the thrust force can be supported by a simple mechanism.

[0016]

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

As shown in FIG. 4, the horizontal rolling mill 10 comprises a four-high rolling mill.
1 and 12 and upper and lower rolls 13 and 14 are configured as a work roll cross mill in which only upper and lower work rolls 11 and 12 in contact with the rolled plate W can roll cross.

The upper and lower work rolls 11 and 12 include:
The same cross mechanism is provided for each of them. Here, the cross mechanism 15 of the upper work roll 11 shown in FIG. 1 will be described as an example.

In this cross mechanism 15, both ends of the upper work roll 11 are supported on the side opposite to the housing 17 of the work roll chock 16 in the plate traveling direction L.
And a front end of a rod 19 connected to the piston is in contact with the inner surface of the window of the housing 17, and a working fluid from a working fluid supply device (not shown) is provided. The rotation of the upper work roll 11 can be slightly crossed with respect to the direction perpendicular to the plate moving direction L by adjusting the amount of extrusion by the rod 19 by the supply and discharge of.

By providing the cross cylinder 18 that is built into the roll chock 16 and constitutes the cross mechanism 15, there is no need to perform any processing on the housing 17, and the manufacture of the cross mechanism 15 is facilitated. In addition, when the existing rolling mill is converted into a cross mill, it can be easily coped with by modifying only the roll chock 16.

Next, the thrust receiving mechanism of the horizontal rolling mill 10 will be described.
Since both the upper and lower 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 the horizontal rolling mill 10
Reference numeral 0 denotes one of the upper work roll chock 16 (the left roll chock in FIG. 1) 1 of the upper work roll chock 16 provided to support both ends of the upper work roll 11.
6 is equipped.

The plate traveling direction L of the work roll chock 16
Brackets 21 are attached by bolts and the like at upper and lower positions in the direction of board movement L at right angles to the outer surface of the support plate 22, and the center of the support plate 22 receiving thrust force between these two brackets 21 is attached by a vertical pin 23. And can be rotated 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 so as to sandwich both surfaces of the two thrust receiving portions 24, a guide groove 25 is formed horizontally outside the housing 17 along the plate advancing direction L, and the support block 26 slides. It is mounted so as to be capable of being reciprocated by a support cylinder 27 attached to the housing 17.

In the support block 26, wheels 28 are mounted on both sides at intervals slightly wider than the thickness of the thrust receiving portion 24, with rotating shafts arranged in parallel with the plate traveling direction L.

Therefore, the support block 26 is advanced by the support cylinder 27, and the wheels 28 are arranged 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.
Can be supported by wheels 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 with the vertical pin 23, the thrust receiving portion 24 is always kept parallel to the plate traveling direction L. Can keep and completely wheels 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 is upper and lower work rolls 11 and 12 and upper and lower rolls 1
Horizontal rolling mill 1 provided on one of the three roll chocks
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 in the above embodiment are denoted by the same reference numerals and the description thereof will be omitted.

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

As shown in FIG. 4, the upper and lower work rolls 11 and 12 sandwiching the rolled material W have the same thrust force in the four-high rolling mill of the work roll cloth. And Fb, Fb having the same size and opposite directions between the work roll and the waiting roll.

Therefore, the horizontal rolling mill 30 utilizes the fact that thrust forces having the same size and opposite directions act on each other to cancel each other, thereby reducing the thrust force.

In the horizontal rolling mill 30, similarly to the thrust receiving mechanism 20, brackets 31 are provided above and below one outer side of the work roll chock 16 of the upper and lower work rolls 11 and 12.
Are provided, and brackets 33 are provided above and below the roll chocks 32 of the upper and lower rolls 13, 14, respectively. Then, 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, the lower work roll 12 and the roll chocks 16 and 32 of the lower holding roll 14 and the brackets 31 and 33 integral with each other are mechanically connected by connecting pins 35.

Accordingly, the thrust forces Fb, Fb acting between the upper work roll 11 and the upper roll 13 are canceled out, 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 canceled.
Remains. The thrust forces Fw, Fw applied to the upper and lower work rolls 11, 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 to cancel each other out, and these values themselves are considerably small.

As the thrust receiving mechanism for supporting the small thrust forces Fw, Fw, a roll chock 16 of the upper work roll 11 or a roll chock 32 of the upper holding roll 13 to which the above-described thrust receiving mechanism 20 is connected.
Of the lower work roll 12 and the roll chock 32 of the lower holding roll 14, which are also connected on the lower side, and connect the connecting pins 34 and 35 to the pins of the thrust receiving mechanism 20. 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, 12 and the hold-down rolls 13, 14, and each of the thrust forces is applied to each roll. The thrust force can be completely supported by the two thrust receiving mechanisms 20 for four rolls without providing the receiving mechanism 20.

Thus, a 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 according to the present invention will be described with reference to FIG. 3. The same reference numerals are given to the same parts as those in the previous embodiments, and the description is omitted.

In the horizontal rolling mill 40, as shown in FIG. 3, the connected roll chocks when the thrust force generated by the roll cross is offset by the connection of the roll chocks are different from those in FIG.

In the horizontal rolling mill 40, short brackets 41 are provided on the upper and lower work roll chock 16, these brackets 41 are connected by connecting pins 42, and a long bracket 43 is provided on the upper and lower roll chock 32. These long brackets 43 are connected by connecting pins 44.

The upper and lower work roll chock 16
The same one as the thrust receiving mechanism 20 described with reference to FIG. Also, one of the roll chocks 32 of the upper and lower 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 provided separately. ing.

According to such a horizontal rolling mill 40, of the thrust force generated by the work roll cloth, between the upper and lower work rolls 11 and 12 and the upper and lower rolls 13 and
Thus, the thrust force can be completely supported by the two thrust receiving mechanisms 20 for four rolls without providing the thrust receiving mechanism 20 for each roll.

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

In the horizontal rolling mills 30, 40, 4
Two of the rolls are connected by a connecting pin to cancel the thrust force, and at least one of the two connected roll chocks is provided 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 with a simpler structure can be realized.

In each of the above embodiments, the horizontal rolling mill is
Although the description has been given of the case where the rolling mill is constituted by a high rolling mill, it may be constituted by a 6-high rolling mill or the like.

Further, the present invention is not limited to the above-described embodiment, and each component may be changed without departing from the scope of the present invention.

[0047]

As described above in detail with the embodiment, according to the horizontal rolling mill of the present invention, a work roll cross mill in which only the upper and lower work rolls are crossed is provided. The support plate was rotatably attached to one roll chock of the standby roll with a pin or the like, and both sides of these support plates were sandwiched between the wheels of the support block attached to the housing to receive the thrust force. Even if the support plate is crossed, the support plate is always parallel to the plate traveling direction, and the thrust force can be stably supported by a simple mechanism.

According to this horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is provided, and the thrust force generated by the roll cross is substantially equal between the upper and lower work rolls and the upper and lower rolls. Since they are in the opposite direction, the upper work roll and the upper work roll and the lower work roll and the lower work roll, or between the upper and lower work rolls and between the upper and lower work rolls are mechanically connected as roll chalks that can offset the thrust force, At least one of the two connected roll chocks is provided with a thrust receiving mechanism having the same configuration as that of the first invention, so that most of the generated thrust force is canceled, and even if there is a slight remaining thrust force, the thrust force can be easily reduced. It can be supported in a stable state by a simple mechanism.

Further, according to the horizontal rolling mill, a work roll cross mill for crossing only the upper and lower work rolls is provided, and the thrust force generated by the roll cross is substantially equal between the upper and lower work rolls and the upper and lower rolls. Are opposite, so that the upper work roll and the upper work roll and the lower work roll and the lower work roll, or between the upper and lower work rolls and between the upper and lower work rolls are mechanically connected as roll chocks that can cancel the thrust force. Therefore, the generated thrust force can be completely canceled to support the thrust force with a simple mechanism.

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

[Brief description of the drawings]

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

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 a thrust receiving mechanism.

[Explanation of symbols]

 10, 30, 40 Horizontal rolling mill 11, 12 Upper and lower work rolls 13, 14 Up and down 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 part 25 Guide groove 26 Support block 27 Support cylinder 28 Wheel 31 Bracket 32 Preservation roll chock 33 Bracket 34 Connection pin 35 Connection pin 41 Bracket 42 Connection pin 43 Bracket 44 Connection pin L Plate traveling direction W Rolling plate Fw, Fw, Fb, Fb thrust force

Continuation of front page (56) References JP-A-62-34612 (JP, A) JP-A-5-337524 (JP, A) JP-A-5-317933 (JP, A) JP-A-6-15320 (JP) JP-A-5-293518 (JP, A) JP-A-5-277529 (JP, A) JP-A-4-162904 (JP, A) JP-A-4-91807 (JP, A) 58-38601 (JP, A) JP-A-52-88564 (JP, A) JP-A-61-279305 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 13/14 B21B 29/00 B21B 31/02 B21B 1/22

Claims (3)

(57) [Claims] 1. A horizontal rolling mill having at least four rolls and crossing only upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to a plate advance, wherein a vertical axis is formed around one of the work rolls and one of the rolls in contact with the work rolls. A support block provided with a rotatable thrust support plate, and a support block provided with wheels that receive a thrust force by rolling along both surfaces of the support plate is slidably provided along the outer surface of the housing. Horizontal rolling mill. 2. A horizontal rolling mill comprising at least four rolls and crossing only upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to the plate advance, wherein the work rolls and the rolls contacting the work rolls are reversed with substantially the same size. One of the roll chocks that generates a thrust force in the direction is mechanically connected to each other, and at least one of the connected roll chocks is provided with a thrust support plate rotatable around a vertical axis, and along both surfaces of the support plate. A horizontal rolling mill comprising a support block provided with wheels that receive rolling and thrust force, and are slidable along the outer surface of the housing. 3. A horizontal rolling mill provided with at least four rolls and crossing only upper and lower work rolls in a horizontal plane with respect to a direction perpendicular to the plate advance, wherein the work rolls and the rolls in contact with the work rolls are reversed with substantially the same size. A horizontal rolling mill characterized in that one of the roll chocks that generates a thrust force in the direction is mechanically connected.