JPH10166005A - Rolling equipment provided with x-type mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling equipment in which X type mills having high draft is provided in the rolling line and the length of equipment is shortened without impairing a conventional function. SOLUTION: This equipment is the rolling equipment in which at least two X type mills 2 are arranged in tandem and this X type mill 2 consists of upper and lower work rolls 4, 5 which are pivotally supported so as to be able to cross on a horizontal plane and back-up rolls 6, 7, 8, 9 are provided two by two ach of these upper and lower work rolls 4, 5. Each back-up roll 6, 7, 8, 9 is turnably pivotally supported taking the middle point of roll width on the axial center of the roll asa fixed point and, by turning each back-up roll 6, 7, 8, 9 in a prescribed direction, the upper and lower work rolls 4, 5 are horizontally crossed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling facility provided with an X-type mill for performing cross rolling, supported by two backup rolls on each of upper and lower rolls.

[0002]

2. Description of the Related Art Conventionally, rolling equipment has been a tandem rolling equipment in which a number of rolling stands are arranged in series in accordance with the total rolling reduction. The length of the equipment is shortened by using a mill and other types.

[0003]

In recent years, there has been a strong need for compact equipment and hard material rolling, and the ratio between the material thickness of the material to be rolled and the finished thickness, that is, the total rolling reduction, and the rolling force have further increased. Although there is a tendency, the conventional multiple rolling mill has a limit in reducing the diameter of a work roll to cope with a thinner material than the rolling torque and the horizontal reaction force of rolling, and there is a problem in obtaining a high pressure reduction. On the other hand, in the cluster mill, the number of holding rolls is large in order to prevent roll deflection of a small-diameter work roll, and there is a problem in maintenance. On the other hand, the present applicant discloses in Japanese Patent Application Laid-Open No. 6-509 a cross mill having a higher rolling reduction compared with a conventional multiple rolling mill.

The present invention has been made in view of the above-mentioned problems, and provides a rolling facility in which an X-type mill having a high rolling reduction is provided in a rolling line, and the facility length is shortened without impairing the conventional functions. The purpose is to:

[0005]

In order to achieve the above object, according to the invention of claim 1, there is provided a rolling facility in which at least two X-type mills are arranged in tandem, wherein the X-type mills are arranged in a horizontal plane. It consists of upper and lower work rolls pivotally supported so that they can be crossed, and two backup rolls provided for each of the upper and lower work rolls. Each backup roll can be tilted with the roll width center point on the roll shaft center as a fixed point. The upper and lower work rolls can be horizontally crossed by tilting each backup roll in a predetermined direction.

The upper and lower work rolls of the cross mill are supported from both sides by two backup rolls, respectively.
As a result, the work roll can be supported not only in the vertical direction but also in the horizontal direction, so that the diameter of the work roll can be reduced. The shape can be controlled by cross rolling. By providing two or more such X-type mills in a rolling facility in tandem, the length of the facility can be reduced as compared with a conventional rolling facility.

According to the second aspect of the present invention, the X-type mill includes:
An X-type mill set crosswise in a direction opposite to the horizontal cross direction of another X-type mill is included.

When the material to be rolled continuously passes through an X-type mill crossed in the same direction, the material is meandered, but the meandering is canceled by passing through a rolling mill having the cross direction reversed.

In the invention according to claim 3, the X-type mill is capable of reverse rolling.

By rolling the material to be rolled a plurality of times by the same mill by reverse rolling, the number of rolling mills can be reduced and the length of the rolling equipment can be shortened.

In the invention according to claim 4, the X-type mill is divided into an upstream side and a downstream side in the flow direction of the rolled material, the upstream X-type mill is set as a cross, and the downstream X-type mill is not crossed. Is set to

The effect of controlling the shape of the material to be rolled when the thickness is large is more effective. Therefore, the thickness shape is controlled by cross rolling on the upstream side where the sheet thickness is large, and rolling is performed without crossing the upper and lower work rolls on the downstream side where the sheet thickness is reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a rolling facility according to an embodiment of the present invention. The rolling equipment is, for example,
This is a rolling facility for rolling a 2-3 mm steel plate or an aluminum plate in a cold state to a thickness of 0.1 to 0.2 mm.
The material to be rolled 1 is rolled by a cross mill called an X-type mill and wound up by a winding and rewinding machine 3. Two X-type mills 2 are provided in tandem, are capable of reverse rolling, are provided with winding and rewinding machines 3 at both ends, and alternately wind up on one side and rewind on the other side.

The X-type mill 2 comprises an upper work roll 4, a lower work roll 5, an upper left backup roll 6, an upper right backup roll 7, a lower left backup roll 8, and a lower right backup roll 9. In the figure, each roll is 3
The circles at both ends indicate both end faces of the roll, and the center circle represented by a thick line indicates the center of the roll width of the roll. The arrow of each roll indicates that the roll is tilted in the direction of the arrow about the center of the roll width indicated by a bold line and a point on the axis (this point is the tilt center). When the upper left backup roll 6 and the upper right backup roll 7 are tilted vertically and in opposite directions as indicated by arrows, the upper work roll 4 is tilted horizontally as indicated by arrows. When the lower left backup roll 8 and the lower right backup roll 9 are tilted vertically and in opposite directions as indicated by arrows, the lower work roll 5 is tilted horizontally as indicated by arrows. Thus, the upper and lower work rolls 4 and 5 can be set to an arbitrary cross angle. The upper work roll 4 can be tilted horizontally even when the upper left backup roll 6 and the upper right backup roll 7 are tilted horizontally in the same direction. This is the same for the lower work roll 5. Further, even if the backup rolls 6 to 9 are tilted in an oblique direction, the upper and lower work rolls 4 and 5 can cross horizontally.

By arranging two such X-type mills 2 in tandem and performing cold reverse rolling, for example,
3mm steel plate or aluminum plate in cold state.
It can be rolled to a thickness of 1 to 0.2 mm. If a conventional rolling mill is used, it is necessary to arrange five rolling mills in tandem. The reason why the X-type mill 2 is capable of performing such high-pressure rolling is that the use of two backup rolls 6 to 9 for the work rolls 4 and 5 can suppress vertical and horizontal displacements. This is because the diameter of the work rolls 4 and 5 can be reduced. By performing the cross rolling, a high crown and a high shape control can be performed.

FIG. 2 shows a state where the cross directions of the two X-type mills 2 are opposite to each other. When the cross directions of the two X-type mills are the same, the material to be rolled 1 may meander. If the directions of the crosses of the two X-type mills are opposite to each other, the meandering is canceled.

FIG. 3 is a view showing an X-type mill and an X-type mill in a case where a normal rolling state is performed with the cross angle set to zero. When the thickness of the material to be rolled 1 is large, it is rolled by a crossed X-type mill, and the thinned material to be rolled 1 is rolled by an X-type mill in a normal rolling state without crossing. In addition, it can also roll by the normal rolling method which does not cross with both X type mills.

FIG. 4 shows a case where a normal rolling mill 10 is added to the rolling equipment shown in FIG. 1 to increase the rolling capacity. In this case, the normal rolling mill 10 is also a reverse rolling mill.

In the above embodiment, the number of X-type mills is two and the rolling is performed to a desired thickness as the reverse rolling, but the number may be increased without performing the reverse rolling.

[0020]

As is apparent from the above description, according to the present invention, by arranging two or more X-type mills in tandem, it is possible to obtain a rolling facility excellent in shape control at a high pressure reduction rate. As a result, it is possible to obtain a rolling facility having a shorter facility length than the conventional facility.

[Brief description of the drawings]

FIG. 1 is a diagram showing a rolling facility according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which cross directions of two X-type mills are reversed.

FIG. 3 is a view showing a state where a cross angle of one X-type mill is set to zero.

FIG. 4 shows equipment obtained by adding a normal rolling mill to the equipment shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rolled material 2 X-type mill 3 winding and rewinding machine 4 upper work roll 5 lower work roll 6 upper left backup roll 7 upper right backup roll 8 lower left backup roll 9 lower right backup roll 10 Normal rolling mill

Claims (4)

[Claims] 1. A rolling facility in which at least two X-type mills are arranged in tandem, said X-type mill comprising upper and lower work rolls pivotally supported in a horizontal plane so as to be crossable, and each of said upper and lower work rolls. The backup rolls are provided two by two, and each backup roll is pivotally supported so as to be tiltable with the roll width center point on the roll axis as a fixed point, and each backup roll is tilted in a predetermined direction. A rolling facility equipped with an X-type mill, wherein the upper and lower work rolls can be crossed horizontally by means of a roll. 2. The X-type mill according to claim 1, wherein the X-type mill includes an X-type mill cross-set in a direction opposite to a horizontal cross direction of another X-type mill. Rolling equipment equipped with 3. The rolling equipment according to claim 1, wherein said X-type mill is capable of reverse rolling. 4. The X-type mill is divided into an upstream side and a downstream side in a rolled material flow direction, the upstream X-type mill is set to cross, and the downstream X-type mill is set not to cross. A rolling facility comprising the X-type mill according to claim 1.