JPS6358052B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling mill equipped with roll bending means, and particularly to a rolling mill in which a work roll and an intermediate roll are equipped with roll bending means.

Recently, in rolling mills equipped with work rolls, intermediate rolls, and reinforcing rolls, the ability to control the shape of rolled materials has been significantly improved by combining the axial movement adjustment of the intermediate rolls with the bending action of the intermediate rolls. A rolling mill has been proposed.

In order to further enhance the shape control ability of such a rolling mill, it is desirable that the work rolls also have a bending function.

However, in conventional rolling mills, the window of the roll housing is narrow and subject to various restrictions from the surroundings, making it difficult to arrange a large number of bending means.

An object of the present invention is to provide a rolling mill in which intermediate roll bending means and work roll bending means can be provided simultaneously while suppressing the expansion of the window portion of the rolling mill housing. .

In the present invention, the intermediate roll bending means is arranged as close to the center of the rolling mill as possible, and the work roll bending means is arranged outward from the center of the rolling mill than the intermediate roll bending means, so that there is no interference between the two bending means. This prevents the window portion of the rolling mill housing from expanding.

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show one embodiment of the present invention. In FIG. 1, a pair of left and right project blocks 7 and 8 are removably provided at approximately the center in the vertical direction of the window of the roll housing 6, and each of the blocks 7 and 8 has a protrusion 9 that faces the other. , 10 are formed. A pair of upper and lower chock 4 and 5 are supported on the protrusions 9 and 10 so as to be able to move up and down respectively inside, and both chock 4 and 5 are connected to a pair of upper and lower work rolls 1 and 5 for rolling the rolled material 3. 2 are rotatably supported. Moreover, hydraulic rams 11 and 12 for increase bending of both work rolls 1 and 2 are built into the protrusions 9 and 10, respectively.

A pair of upper and lower intermediate rolls 13 and 14 are disposed above and below the work rolls 1 and 2 so as to circumscribe them, and the ends of both intermediate rolls 13 and 14 are connected to the chock 1.
5 and 16, respectively. A pair of upper and lower project blocks 17 and 18 are provided above and below the project blocks 7 and 8, respectively, and movable blocks 19 and 20 are movably mounted on these blocks 17 and 18, respectively. The moving blocks 19 and 20 are provided with the chock 15 and 16 so as to be able to move up and down inside thereof, and the moving blocks 1
9 and 20 are hydraulic rams 2 for applying increase bending to the intermediate rolls 13 and 14;
1 and 22 and hydraulic rams 23 and 24 for effecting day crease bending. Furthermore, the project blocks 17 and 18 are provided with hydraulic rams 25 and 26 for effecting daily crease bending of the work rolls and hydraulic rams 27 and 2 for balancing with the reinforcing rolls.
8 each built-in. Said moving block 1
9 and 20 are held and supported by project blocks 17 and 18, and moving block 1
The holding ends of the chock 13, 14 of the work rolls 1, 2 are located closer to the center than the supporting ends of the chock 4, 5 of the work rolls 1, 2 in the project blocks 7, 8. Therefore, the moving blocks 19, 20 make the vertical movement of the intermediate roll chock 15, 16 smooth, and also stabilize the axial movement of the moving blocks 19, 20 themselves.

A pair of upper and lower reinforcing rolls 29, 30 with high rigidity are disposed circumscribed above and below the intermediate rolls 13, 14, respectively, and both reinforcing rolls 29, 30 have their ends supported by jocks 31, 32, respectively.
The chocks 31 and 32 are provided in the window portion of the housing 6 so as to be movable up and down.

FIG. 2 is a plan sectional view taken along the line - in FIG. is connected to. Moving block 1 supported by the other project block 17
A chock 15 is connected to 9 via a keeper plate 34. Therefore, the intermediate roll 13
During the axial movement of the intermediate roll chock 15 and the moving block 19 are moved by the cylinder 35 via the keeper plate 34. At this time, the intermediate roll bending hydraulic rams 21 and 23 are built into the moving block 19 and move at the same time as the chock 15, so no matter what position the intermediate roll 13 is in, it applies force to the center of the chock 15. I will let you do it. Note that the same applies to the lower intermediate roll 14.

Next, the action will be explained.

When the bending action on the work rolls 1, 2 is increased, hydraulic rams 11, 12 built in the central project blocks 7, 8 are operated to project. On the other hand, when reducing the bending effect on the work rolls 1 and 2, the project blocks 17 and 18 supporting the intermediate rolls are used.
The hydraulic rams 25 and 26 disposed in the rams 25 and 26 are moved to protrude.

Furthermore, when increasing the bending action in the intermediate rolls 13 and 14, the moving block 1 in the project blocks 17 and 18 is
Reference numerals 9 and 20 cause built-in hydraulic rams 21 and 22 to project. On the other hand, when the bending action on the intermediate rolls 13, 14 is to be reduced, the other hydraulic rams 23, 24 built in the moving blocks 19, 20 are moved to protrude. in this case,
Moving blocks 19, 2 by actuation of cylinder 35
It is preferable to appropriately select the positions of the intermediate rolls 13, 14 relative to the work rolls 1, 2 by adjusting the positions of the rams 21, 22, 23, 24.
applies a bending force to the center of the jocks 15 and 16.

In this way, bending action can be added to both the work roll and the intermediate roll, so that the ability to control the shape of the rolled material can be significantly improved.

In addition, each hydraulic ram that performs the bending action of the intermediate rolls is arranged in the inner space of the moving block so as to be located as close to the center of the rolling mill as possible, and each hydraulic ram that performs the bending action of the work rolls is located through the window of the housing. A project block for the work rolls which is directly arranged on the inner wall surface of the section, and a project block for the intermediate rolls supporting the moving block are respectively arranged, and each hydraulic ram as a bending means for the intermediate rolls is provided. are also located outside of the center of the rolling mill,
While improving the shape control ability of the rolling mill as described above, the increase in the window portion of the housing is suppressed.

In the above embodiments, the case where a hydraulic ram is used as the bending means has been described, but the present invention is not limited to this, and other configurations may be used. In addition, although the case where the bending means for the intermediate rolls is provided on a moving block provided on the project block so as to be movable in the roll axis direction has been described, this bending means is provided directly on the project block near the center of the rolling mill. It's okay.

As described above, according to the present invention, it is possible to significantly improve the shape control ability of the rolling mill while suppressing the increase in the window portion of the housing.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, in which Figure 1 is a front sectional view of the whole, Figure 2 is a plane sectional view taken along the line - in Figure 1, and Figure 3 is a main part. FIG. 2 is an enlarged partial front cross-sectional view. 1, 2... Work roll, 3... Rolled material, 4, 5
...Chock for work roll, 6...Housing,
7, 8...Project block, 11, 12...
... Hydraulic ram, 13, 14 ... Intermediate roll, 15,
16... Chick for intermediate roll, 17, 18...
Project block, 19, 20...Moving block, 21, 22...Hydraulic ram, 23, 24...
Hydraulic ram, 25, 26...Hydraulic ram, 27, 28
...Hydraulic ram, 29,30...Reinforcement roll, 3
3, 34...Keeper plate, 35...Cylinder.

Claims (1)

[Claims] 1. A pair of work rolls for rolling a rolled material, a pair of intermediate rolls disposed so as to circumscribe each of both work rolls, a pair of reinforcing rolls each circumscribed and supported by both intermediate rolls, and both said intermediate rolls. and intermediate roll bending means that applies a force perpendicular to the roll axis direction to each chock of both intermediate rolls to impart a bending action to the intermediate rolls. A work roll bending means is provided for applying a bending action to the work roll by applying a force perpendicular to the roll axis direction to each chock of both the work rolls. A rolling mill characterized in that a bending means is arranged at a central position in the axial direction of the roll.