JPH05228518A - Rolling device - Google Patents

Abstract

PURPOSE:To easily bend work rolls and to improve controlability for crown by bearing each work roll with double chocks and providing independently benders in the vertical direction and horizontal direction to each chock respectively. CONSTITUTION:When the distribution of thickness of a high crowned plate material 3 is corrected, bending force is operated by vertical benders 6 in the direction separating the axial end parts 1a of upper and lower work rolls 1 in the parts of outer chocks 4 and bending force is operated by horizontal benders 7 in the direction moving the axial end parts 1a to the downstream side of a rolling line, on the other hand, bending force opposite to that in the parts of the outer chocks 4 is operated by vertical and horizontal benders 8, 9 in the parts of inner chocks 5. In this way, when the bending force is operated to the axial end parts 1a of the work rolls 1, the resultant moment of each bending force can be applied in oblique direction to the work rolls 1 and the work rolls can be bent in the oblique direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling apparatus capable of controlling the thickness distribution of rolled sheet material in the sheet width direction.

[0002]

2. Description of the Related Art In recent years, the requirements for the thickness accuracy of rolled products in the plate width direction have become more and more strict, but in general, rolled coils do not have a constant plate thickness in the plate width direction. Since the thickness distribution is likely to occur, it is necessary to correct the thickness distribution to cancel it in order to meet the above demand. A crown control method by work roll bending is known as one of methods for correcting the plate thickness distribution such as middle height.

A conventional rolling apparatus having a work roll bending function has a structure having upper and lower work rolls 1 and upper and lower backup rolls 2 as shown in FIG. , The bending force P _{B in} the upward and downward directions is applied by a roll bender such as a hydraulic cylinder, and the plate material 3 is flattened when the thickness distribution of the plate material 3 is corrected.
The bending force P _B is adjusted in accordance with the middle and high conditions occurring in the upper and lower work rolls 1 as shown by the axis O.

[0004]

However, in the above-described conventional rolling apparatus, even if the bending force P _B is applied to the shaft end portion 1a of the work roll 1, the displacement of the body end portion 1b of the work roll 1 becomes X. Since the work roll 1 was constrained by the backup roll 2 at some parts, the work roll 1 could not be freely bent. Therefore, the crown control effect by the work roll bending cannot be said to be sufficient.

Therefore, the present invention is intended to allow the work roll to be freely bent and to improve the crown control capability.

[0006]

In order to solve the above problems, according to the present invention, an outer chock and an inner chock are attached to both shaft ends of a work roll, and each chock has a vertical bender and a horizontal bend. The configuration is such that each vendor is provided.

Further, the work roll may be arranged offset with respect to the rolling line in the rolling line direction.

[0008]

In the double chock bending, bending forces are applied independently in two directions, vertical and horizontal, so that the resultant moment acts in an oblique direction. Therefore, the work roll can be easily bent, and thereby the crown control ability can be improved.

If the work roll is offset in the rolling line direction, the work roll can be bent more easily.

[0010]

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

FIGS. 1 to 3 show an embodiment of the present invention, which has upper and lower work rolls 1 and upper and lower backup rolls 2 similarly to the one shown in FIG. In a configuration in which the plate material 3 is rolled between the outer chock 4 and the inner work chock 5 on both shaft ends 1a of the upper and lower work rolls 1 to form a double chock, each outer chock 4 has , A vertical bender 6 is provided so that the bending force P _V1 can be applied vertically to the rolling line L, and a horizontal bender 7 is provided so that the bending force P _H1 can be applied toward the rolling line L direction. Further, the bending force P _V2 also applies to each of the above inner chocks 5 on the rolling line L.
A vertical bender 8 is provided so that the bending force P _H2 can be applied vertically to the rolling line L.
A horizontal bender 9 is provided so that the work roll 1 can be hung in any direction, and the work moment 1 of each bending force is applied in an oblique direction so that the work roll 1 can be bent in an oblique direction.

When the thickness distribution of the medium-high plate material 3 is to be corrected, a so-called double chock bending is applied to the outer chock 4 and the inner chock 5 mounted on the shaft ends 1a of the upper and lower work rolls 1, so-called. , Perform incremental bending. That is, in the outer chock 4 portion, as shown in FIG. 3A, a bending force P _V1 is applied in a direction in which the vertical bender 6 separates the shaft ends 1a of the upper and lower work rolls 1 from each other, and the horizontal bender 6 A bending force P _H1 is applied in the direction of moving the shaft end 1a to the downstream side of the rolling line L by 7. On the other hand, in the inner chock 5 portion, as shown in FIG. 3B, the bending force P _V2 and P _H2 are applied in the opposite directions to the outer chock 4 portion by the vertical bender 8 and the horizontal bender 9, respectively. When the bending force is applied to the shaft end portion 1a of the work roll 1 in this manner, the resultant moment M of the bending forces can be applied to the work roll 1 in an oblique direction, as shown in FIG. Therefore, in this case, the work roll 1 as a whole is set in a state in which the intermediate roll portion is located near the regular rolling position and the roll barrel end portion 1b is located downstream of the rolling line L as shown by the chain double-dashed line. It can be bent in an oblique direction.

In the above, when the work roll 1 is bent in an oblique direction, the trunk end portion 1b is not directly restrained by the backup roll 2, so that the work roll 1 is easily bent, and as a result, the crown control ability can be improved.

Next, FIG. 4 shows another embodiment of the present invention. In the same construction as that of the embodiment of FIGS. 1 to 3, the upper and lower work rolls 1 and the shafts of the upper and lower backup rolls 2 are arranged. A straight line (rolling line) l connecting the centers is appropriately offset in the direction of the rolling line L.

In the case of the embodiment of FIG. 4, the work roll 1
Since the work roll 1 is offset in the rolling line L direction, when the work roll 1 is bent in an oblique direction, the restraining force of the roll body end portion 1b by the backup roll 2 is further reduced, and the work roll 1 is more easily bent. And the crown control capability can be further increased.

The present invention is not limited to the above-mentioned embodiments, and is not limited to the four-roll structure, but can be similarly applied to a rolling device having a five-roll or six-roll structure. It goes without saying that various changes can be made without departing from the scope of the invention.

[0017]

As described above, according to the rolling apparatus of the present invention, the work rolls are supported by the double chocks, and the vertical and horizontal benders are independently provided for each chock. By bending the work roll, the resultant moment can be applied in an oblique direction, which allows the work roll to be easily bent and the crown control capability to be improved. The offset arrangement in the direction exhibits an excellent effect that the crown control capability can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a rolling device of the present invention.

FIG. 2 is a left side view of FIG.

3A and 3B show directions of a bending force acting on each chock, FIG. 3A being an enlarged arrow view of IIIA in FIG. 1, and FIG. 3B being an enlarged arrow view of IIIB in FIG.

FIG. 4 is a schematic side view showing another embodiment of the present invention.

FIG. 5 is a schematic view showing an example of a conventional rolling apparatus.

[Explanation of symbols]

 1 Work roll 1a Shaft end 4 Outer chock 5 Inner chock 6 Vertical bender 7 Horizontal bender 8 Vertical bender 9 Horizontal bender L Rolling line l Straight line (roll down line)

Claims (2)

[Claims] 1. A rolling apparatus comprising an outer chock and an inner chock attached to both shaft ends of a work roll, and a vertical bender and a horizontal bender provided in each of the chocks. . 2. The rolling apparatus according to claim 1, wherein the work roll is offset from the rolling line in the rolling line direction.