JP2001062506A - Method and equipment to support work roll for 4-stage rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a thin and wide sheet material with a 4-stage rolling mill of a low price and to realize high rolling accuracy. SOLUTION: With a 4-stage rolling mill, a holder 3 is fixed to a bearing box 4 of a backup roll 2. The rotating shaft of a work roll 1 arranged at the offset position against the backup roll 2 is held in a turnable way by the holder 3. The holder 3 forms a ring shape to surround the end periphery of the backup roll 2 and is fixed to the bearing box 4 by means of a connecting shaft 8 to connect the right and left holders 3 and a fixing shaft 9 to fix the holder 3 to the bearing box 4. The holding roller 9 is installed in a turnable way on the connecting shaft 8 and the holding roller 9 is brought into contact with the backup roll 2 to maintain the clearance between the holder 3 and backup rolls 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and apparatus for supporting a work roll for a four-high rolling mill capable of supporting a work roll without using a chock.

[0002]

2. Description of the Related Art Generally, four-high rolling mills are widely used as rolling mills for rolling and manufacturing wide and relatively thin plates. In this four-high rolling mill, a pair of small-diameter work rolls is disposed between a pair of upper and lower backup rolls that receive a rolling load, and a metal plate is inserted between the work rolls to perform rolling. Both of the backup roll and the work roll are supported at both ends of each roll by a support member called a chock. This chock is composed of bearings such as bearings, oil seals, bearing boxes, and other members.To perform precise rolling, the accuracy of the chock itself and the accuracy of the mounting position of the chock are extremely important. Has become.

[0003]

When a plate material is rolled thinly, the work roll can be rolled thinner as the diameter of the work roll becomes smaller. Further, in order to roll a wide plate, it is necessary to increase the roll width of the work roll. Therefore, when rolling a thin and wide plate, the roll width of the work roll having a reduced diameter is increased.However, as the diameter of the work roll becomes smaller, or as the roll width becomes larger, the work roll becomes longer in the longitudinal center portion. And there was a problem that rolling accuracy was lowered. Particularly in the case of a backup drive, the deflection of the work roll tends to increase.

[0004] In addition, as the diameter of the work roll is reduced, higher precision of the chocks is required, but the production and mounting of the high precision chocks require a great deal of cost. Further, when the diameter of the work roll is further reduced, there may be a case where there is no space for mounting the chocks of the work roll. In this case, conventionally, means for supporting a work roll from each direction of the work roll using a large number of backup rolls, such as a six-high rolling mill, a twelve-high rolling mill, and a twenty-high rolling mill, is employed. However, the more backup rolls are used, the more expensive the production cost of the rolling mill becomes. Therefore, at present, when rolling is manufactured using a rolling mill employing a large number of backup rolls, the manufacturing cost must be extremely high.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it has become possible to manufacture a thin and wide plate material with a low-cost four-high rolling mill, and to realize high rolling precision. It is an object of the present invention to provide a method and a device for supporting a work roll for a four-high rolling mill.

[0006]

In order to achieve the above object, a first means of the present invention is to provide a four-high rolling mill in which a roll load of a work roll 1 is supported at an offset position of a backup roll 2 and a backup roll is supported. The rotating shaft 1 of the work roll 1 is held by holders 3 arranged near both ends of the roll 2.
A is a method of holding A rotatably.

A second means is that in a four-high rolling mill, a holder 3 is fixed to a bearing box 4 of a backup roll 2, and a rotary shaft 1 A of a work roll 1 arranged at an offset position with respect to the backup roll 2. Is rotatably held by the holder 3 and the roll load of the work roll 1 is supported at the offset position of the backup roll 2.

Further, the holder 3 of the third means has a ring shape surrounding the end of the backup roll 2, and a connecting shaft 8 for connecting the left and right holders 3 to each other, and the holder 3 is a bearing box. 4 and fixed to a fixed shaft 9. A holding roller 9 is rotatably mounted on the connecting shaft 8 and the holding roller 9 is brought into contact with the backup roll 2 to maintain an interval between the holder 3 and the backup roll 2. The provision of the position adjustment is a means for solving the problem.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The support device of the present invention is mounted on a four-high rolling mill.

Work roll 1 is backup roll 2
And one-way rolling. The rotating shaft 1A of the work roll 1 is rotatably held by a holder 3 via a bearing 5, and the holder 3 is fixed to a bearing box 4 of a backup roll 2 to be described later. And the backup roll 2 is maintained at a constant position (see FIG. 1).

The backup roll 2 is supported by chocks 7 mounted on the upper and lower frames, respectively. The chocks 7 support the roll load of the work roll 1 together with the backup roll 2. Further, the upper backup roll 2 is provided together with the chocks 7 so as to be adjustable in position by a height adjusting device (not shown) provided above.

The holder 3 is a rotary shaft 1A of the work roll 1.
Is rotatably held, and is fixed to the bearing box 4 of the backup roll 2. The illustrated holder 3 is formed in a ring shape surrounding the end of the backup roll 2. The left and right holders 3 are connected to a connection shaft 8, and the holder 3 is fixed to a bearing box 4 by a fixed shaft 9. It is fixed to. Furthermore,
A holding roller 10 is rotatably mounted on the connecting shaft 8, and the holding roller 10 is brought into contact with the backup roll 2 to maintain a constant distance between the holder 3 and the backup roll 2 (see FIG. 2). .

On the other hand, a holding recess 3A for inserting the rotating shaft 1A is provided in a part of the holder 3, and the rotating shaft 1A in the holding recess 3A is provided.
Is held via a bearing 5 (see FIG. 1). Since the load at the time of rolling the work roll 1 is supported by the backup roll 2 on the entire roll surface, the load applied to the holding recess 3A mainly supports the load applied in the thrust direction. Although the bearing 5 is omitted in FIG. 3, the bearing 5 to be used is suitable for ball bearing.

The supporting method of the present invention is performed as follows using the above-described supporting device. That is, the roll load of the work roll 1 is supported at the offset position of the backup roll 2, and the rotating shaft 1A of the work roll 1 is rotatably held by holders 3 disposed near both ends of the backup roll 2. is there. In this supporting method, the change of the offset position, the shape of the holder 3, and the change of the mounting position of the holder 3 can be arbitrarily changed within a range where the support method of the present invention can be realized.

[0015]

According to the present invention, the above-mentioned configuration achieves the original object.

That is, by the supporting method according to the first aspect and the supporting apparatus according to the second aspect, a thin and wide plate material is formed.
It was successfully manufactured on a low-cost four-high rolling mill. Thereby, the bending of the work roll at the time of rolling, such as when a conventional thin and long work roll is used, is eliminated. As a result, the diameter of the work roll 1 becomes 10
It is possible to use from 0mm to 10mm, and the diameter ratio between the backup roll 2 and the work roll 1 is conventionally 3:
Although about 1 was the limit, it became possible to use up to 6: 1 according to the present invention.

Moreover, since no chocks are used for the work roll 1, the work roll 1 can be provided at a lower price than conventional four-high rolling mills. It is extremely inexpensive compared to a rolling mill using a large number of backup rolls, such as a step rolling mill.

Further, high rolling accuracy is realized. For example,
Rolling up to 20 μm with stainless steel and 5 μm with copper material is possible.
/ 3 can be rolled thinly.

According to the third aspect, the relative position between the work roll 1 and the backup roll 2 is always kept constant, and the position of the work roll can be easily adjusted.

As described above, according to the present invention, it is possible to manufacture a thin and wide plate material with a low-cost four-high rolling mill, and to realize various industrially useful effects such as realizing high rolling accuracy. Is played.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the support device of the present invention.

FIG. 2 is a side view of the support device of the present invention.

FIG. 3 is a perspective view showing a main part of the support device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work roll 1A Rotary shaft 2 Backup roll 3 Holder 3A Holding recess 4 Bearing box 5 Bearing 6 Bearing 7 Chock 8 Connecting shaft 9 Fixed shaft 10 Holding roller

Claims (3)

[Claims] 1. In a four-high rolling mill, a roll load of a work roll is supported at an offset position of a backup roll, and a rotating shaft of the work roll is rotatably held by holding members arranged near both ends of the backup roll. A method for supporting a work roll for a four-high rolling mill. 2. In a four-high rolling mill, a holder is fixed to a bearing box of a backup roll, and a rotation axis of a work roll disposed at an offset position with respect to the backup roll is rotatably held by the holder, and the work roll is rotated. A work roll supporting device for a four-high rolling mill, wherein the roll load is supported at an offset position of a backup roll. 3. The holding tool has a ring shape surrounding the end of the backup roll, and is fixed by a connecting shaft that connects the left and right holding tools to each other and a fixed shaft that fixes the holding tool to the bearing box. , The holding roller is rotatably mounted on the connecting shaft,
3. The support device for a work roll for a four-high rolling mill according to claim 2, wherein the holding roller is brought into contact with the backup roll to maintain an interval between the holding tool and the backup roll, and the holding tool is provided so as to be adjustable in position together with the backup roll. .