JPH11244918A - Device for controlling/sliding a plurality of rolls in axial direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for controlling/sliding a plurality of rolls in the axial direction which are arranged so as to be coaxially successively situated in the chocks of the rolls of a roll stand and pivotally supported in their thrust bearings and radial bearings. SOLUTION: This device is provided with a ring piston RK which can be pressurized by a pressurizing medium. This ring piston RK is arranged around a carrier which is connected to the thrust bearing 5. In such a case, the outer periphery of a part of a bearing housing 6 with which the thrust bearing 5 is surrounded is formed as the ring piston RK. This ring piston RK is slidably arranged in a cylinder bush 8 which is arranged in a chock 9 and hermetically sealed with a plurality of packings facing to this cylinder bush 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ring piston arranged around a carrier connected to a housing of a thrust bearing and pressurizable with a pressurized medium, coaxially in a choke of a roll stand. The present invention relates to an apparatus that adjusts and slides a plurality of rolls that are arranged so as to be positioned one behind the other and that are axially supported in a thrust bearing and a radial bearing in the axial direction.

[0002]

2. Description of the Related Art In the case of rolling an asymmetrical shaped material, in consideration of the axial force generated in the roll caliber,
Adjusting and holding a plurality of interlocking rolls at a predetermined axial position is important for the rolling accuracy and the linear motion of the rolled material. This is also true for the multiple rolls of the universal roll stand. Because the possible relative axial sliding between these lateral rolls is
The reason is that the tolerance of the thickness of the rolled material of the parallel rolled material can be adversely affected. Even when a sheet pile is rolled in a double roll stand, it is necessary to appropriately maintain the tolerance of the rolled sheet. Moreover, when the roll stand has a plurality of caliber cassettes slidable in the transverse direction with respect to the rolling line, it is necessary to adjust and hold the relative axial positions of the interlocking rolls. . These caliber cassettes are provided with two or more so-called selective calipers that can be selectively moved within a rolling portion.

[0003] It is known from EP-A-257383 that the use of a hydraulic unit which presses on both sides causes axial sliding of a plurality of rolls. The hydraulic unit comprises a single piston rod having a ring piston and arranged concentrically with its roll. In this case, this piston rod is connected to the bearing housing of the thrust bearing.

[0004] The disadvantages of this embodiment are that the construction of the device is extremely long and exceeds the dimensions of the chocks along the axial direction, and that the construction costs are also large.
In addition, the hydraulic unit has to be removed or re-assembled first when replacing the bearings, each time loosening the connection between the hydraulic unit and its bearing housing. is there.

[0005]

SUMMARY OF THE INVENTION The object of the invention is to eliminate the disadvantages of the long structural dimensions mentioned above under a structurally simplified construction, and to eliminate the expense in mounting and dismounting the bearing. Therefore, it is an object of the present invention to improve these devices for adjusting and sliding a plurality of rolls in the axial direction.

[0006]

This object is achieved by the fact that the outer circumference of a part of the bearing housing surrounding the bearing is formed as a ring piston.

[0007] In addition to the improvements already described, the construction of the invention provides that the sliding force is mainly in the outside of the known device, like the outside of the chock, in front of the chock, as well as a plurality of intermediate members and the connection of these intermediate members. Instead of being produced on the roll neck through the element or on the bearing of this roll neck,
It also offers the advantage that this sliding force is generated inside the chock in the area close to the thrust bearing and in the direction of the chock.

As the present invention further shows, a portion of the ring piston shape of the bearing housing may be slidably disposed within a cylinder bush located within the chock, and a plurality of the bearing bushing facing the cylinder bush. It can be sealed with ring packing. In this case, the cylinder bush may be formed so as to be divided in the radial direction to simplify installation and removal of the bearing housing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

As can be seen from FIG. 1, a radial bearing 2 is mounted on a roll neck 1 and includes a thrust bearing including both inner bearing rings 5a, a plurality of bearing rollers 5b, and both outer bearing rings 5c. 5 is fixedly installed by the intermediate bush 3 and the fastening bush 4. These outer bearing rings 5c are surrounded by their bearing housing 6. Here, the bearing housing 6 is composed of three housings 6a, 6b, 6c which are connected and held by bolt connecting portions 7. The surrounding part of the bearing housing 6 surrounding the thrust bearing 5 is in the form of a single ring piston RK. This ring piston RK is surrounded by a ring-cylindrical recess 8 a of the cylinder bush 8. This cylinder bush 8 is installed in a chock indicated by 9. The radial side surfaces of the ring-cylindrical concave portion 8a and the ring piston R facing these side surfaces
The annular path formed between the ring surface of K and the pressurized medium control unit (not shown) is connected via a pressurized medium supply conduit 10 shown by a broken line. This ring piston R
K and the roll neck 1 connected to the ring piston RK via the bearing housing 6 and the thrust bearing 5 can be positioned as desired through the pressurized medium control unit and one linear displacement meter. . Here, the cylinder bush 8 is divided and formed, and
The ring piston RK faces the cylinder bush 8 and is sealed with a plurality of ring packings.

[Brief description of the drawings]

FIG. 1 is a sectional view showing each component of an apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll neck 2 Radial bearing 3 Intermediate bush 4 Tightening bush 5 Thrust bearing 5a Bearing ring 5b Bearing roller 5c Bearing ring 6 Bearing housing 6a Housing 6b Housing 6c Housing 7 Bolt connection part 8 Cylinder bush 8a Depression 9 Chock 10 Pressurized medium supply Conduit RK Ring piston

Claims (3)

[Claims] 1. A ring piston which is arranged around a carrier which is connected to the housing of the thrust bearing and which can be pressurized with a pressurized medium, coaxially one after the other in the chocks of the rolls of the roll stand. A device for adjusting and sliding a plurality of rolls, which are arranged so as to be positioned and are axially supported in the thrust bearing and the radial bearing, in the axial direction, the bearing housing (5) surrounding the thrust bearing (5). The device according to (6), wherein a part of the outer periphery is formed as a ring piston (RK). 2. A ring piston part (RK) of a bearing housing (6) is slidably arranged in a cylinder bush (8) installed in a chock (9), and this cylinder bush (RK) Device according to claim 1, characterized in that it is sealed with a plurality of ring packings facing (8). 3. The device according to claim 1, wherein the cylinder bush (8) is formed radially divided.