JPH0215284B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rolling stand that can be converted from a four-layer type to a multi-stage type, and from a multi-stage type to a four-layer type.

[Prior art and its problems] Large-diameter work rolls, such as the four-layer rolling mill shown in Figure 2, are used for rolling thick materials and require a large rolling reduction, so indirect drive systems may cause slip between the rolls. There is no choice but to drive the work roll. On the other hand, the multi-stage rolling mill shown in Fig.
With the small-diameter work roll disclosed in Japanese Patent No. 6176, it is not only impossible to connect a spindle thereto, but also the torque that can be transmitted is insufficient for rolling operations due to the small diameter. For this reason, the former uses the work roll and the latter uses the auxiliary roll as the driven roll, and it is also necessary to replace the spindle. In addition, in order to ensure the required rolling torque for both, it was necessary to set the drive speed reducer to two speeds.

In addition, when changing the structure, for the reasons mentioned above, in a 4-layer rolling mill, a 4-layer roll set is also changed.
In a multi-high rolling mill, the entire multi-high roll set had to be replaced. In other words, the four-layer type operation is no longer necessary, and in the multi-stage type, the support device for the upper and lower work rolls is attached to the bearing box for the lower reinforcing roll, so when changing the structure, the rolling mill housing It is necessary to take out the complete roll set from the machine and change each component.
The roll set had to be replaced, and for this reason it was necessary to prepare a large number of spare rolls, bearing boxes, etc.

The present invention has been made in view of the above circumstances, and solves the problems of the prior art by simple and rational means. To provide a rolling stand which can be driven by a shaft, can omit the process of replacing the spindle, can quickly change its structure by simply loading and unloading a cassette, and can eliminate restrictions on rolling work.

[Means to solve the problem]

The rolling stand of the present invention, which solves the problems of the prior art, has two work rolls arranged in a vertical relationship, and a reinforcing roll whose axis is on a vertical axis plane passing through the axes of the upper and lower work rolls. In the rolling mill installed above and below the work rolls,
An upper reinforcing roll and a work roll, and a lower reinforcing roll and a working roll are supported separately on a support body as a set, and the support body of each of the upper and lower roll sets is configured to be movable up and down with respect to the housing, On the other hand, the supports that support the pair of upper and lower small-diameter work rolls, the horizontal intermediate rolls, and the group of divided support rollers that make up the multi-high rolling mill are collectively constructed into a cassette structure, and the supports are arranged in the upper and lower sections. The reinforcing roll of the roll set and the supporting body of the work roll are removably fitted into the space formed by raising and lowering the support, and the work roll of the rolling mill is used as an intermediate roll. .

〔Example〕

The details of an embodiment of the present invention will be explained with reference to FIG.

FIG. 1 is a partially cutaway front view of the multi-high rolling mill state.

Reference numerals 1 and 2 denote a pair of upper and lower work rolls, and reinforcing rolls 3 and 4 are disposed above and below the work rolls 1 and 2, and the axes of the work rolls 1 and 2 and the reinforcing rolls 3 and 4 are , lies on the vertical axis plane passing through the axes of both rolls. The upper work roll 1 and the reinforcing roll 3 and the lower work roll 2 and the reinforcing roll 4 form a set, respectively, and a support 6 is attached to the rolling stand housing 5 so that they can be raised and lowered individually. It is pivoted on 7.

8 in the figure is a cassette, and this cassette 8
The upper support 6 supporting the upper work roll 1 and reinforcing roll 3 as a set is connected to the balance device 3.
0, and by raising the required stroke by the lowering device 34, lowering the lower support 7 by a pass line adjustment device (not shown), and adjusting the vertical movement of both the supports 6 and 7. It is loaded and installed in the space between the work rolls 1 and 2 from the axial direction of the rolls.

This cassette 8 incorporates a pair of upper and lower small diameter work rolls 9, 10, horizontal intermediate rolls 11, 12, and divided support rollers 13, 14. The divided support rollers 13, 14 are supported by axle boxes 17, 18 having keyed sliding shafts 15, 16 at one end, and each sliding shaft 15, 16 provided inside each axle box 17, 18. A support bridge 1 provided on the rolling stand housing 5 is provided on the outer end surface of the rolling stand housing 5.
Divided support rollers 13 and 14 built into 9 and 20
The surface is brought into contact with cylinders 21 and 22 for extrusion. That is, one side of the cassette 8 and the sliding shaft 1
The outer surfaces of 5 and 16 match, and the cassette 8
One side surface is in sliding contact with the inner surface of the support bridges 19, 20, and as described above, the outer surface of each sliding shaft 15, 16 is in contact with the cylinder 21, 22.
It is designed to be used face-to-face.

23, 24 are reinforcing roll yoke, 25, 26
2 is a work roll chock, and the above-mentioned upper and lower supports 6, 7 are constituted by a combined structure of both roll jocks 23, 24 and 25, 26. Further, 27 and 28 are hydraulic pistons for work roll balance. In addition, the above work rolls 1 and 2
This is when the rolling mill is used as a four-layer rolling mill, and when a six-layer rolling mill is used as shown in the figure, the work rolls 1 and 2 serve as intermediate rolls. In this embodiment, work rolls 1 and 2 are
The rollers act as driven rolls, and are designed so that changing the spindle can be omitted when changing the structure to a six-layer type. In the figure, 45 and 46 are arms that support the bearing boxes (not shown) of the small-diameter work rolls 9 and 10 and the horizontal intermediate rolls 11 and 12.

〔Effect of the invention〕

According to the configuration of the present invention as described above, the following effects can be obtained.

(a) Hot and cold steel plate rolling mills can be converted into a four-layer rolling mill with large-diameter work rolls and a multi-high rolling mill with small-diameter work rolls, and can be easily changed according to the rolling operation. There are features that can be selected and replaced.

(b) In addition, structural changes can be made quickly by simply loading and unloading the cassette without having to pull out the entire roll set from the rolling mill housing, so it has excellent features such as eliminating restrictions on rolling operations.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view, and FIGS. 2 and 3 are partially cutaway front views of a conventional example. 1, 2...Work roll, 3, 4...Reinforcement roll, 5
...Rolling stand housing, 6, 7...Support, 8
...Cassette, 9, 10...Small diameter work roll, 11,
12...Horizontal intermediate roll, 13, 14...Divided support roller, 15, 16...Sliding shaft with key, 17, 18...
Axle box, 19, 20...Support bridge, 21, 22...
Cylinder, 23, 24... Reinforcement roll choke, 2
5, 26...Work roll check.

Claims (1)

[Claims] 1. Two work rolls in a vertical relationship, and a reinforcing roll whose axis is on a vertical axis plane passing through the axes of the upper and lower work rolls, above the upper and lower work rolls, and , in a rolling mill arranged on the lower side, the upper reinforcing roll and work roll, and the lower reinforcing roll and work roll are each supported as a set on a support body, and the support body of each set of upper and lower rolls is supported separately. has a structure that can be raised and lowered relative to the housing, while the supporting body that supports the pair of upper and lower small diameter work rolls, the horizontal intermediate roll, and the group of divided support rollers that make up the multi-stage rolling mill has a cassette structure. The support body is removably fitted into the space formed by raising and lowering the reinforcing rolls of the upper and lower roll sets and the support bodies of the work rolls, and the work rolls of the rolling mill are fitted in a removable manner. A rolling stand characterized by having an intermediate roll.