JP2592176B2 - Roll support structure of multi-high rolling mill - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll supporting structure for a multi-high rolling mill that can prevent bearing damage with a simple structure.

<Conventional technology> Conventionally, when rolling a metal material such as steel, a multi-stage process in which a rolled material is passed between a plurality of rolls installed in parallel in a vertical direction and rolling is performed by pressing force from these rolls. Rolling mills were known.

For example, a multi-high rolling mill as shown in FIG. 3 is one example.

As shown in FIG. 3, an upper work roll 1 having a small diameter is disposed on the upper surface side of a threaded surface of a rolled material 10 as a steel strip, and the upper work roll 1 is disposed via a pair of intermediate rolls 2. And the upper divided reinforcing roll 3 divided into 5 in the roll axis direction
It is supported in contact with a and 3b.

And the intermediate roll 2 of these rolls 1, 2, 3a, 3b
Are supported at both ends by an intermediate roll chock 103a, which is a bearing box fitted to the intermediate roll outer chock 102 so as to be vertically movable, and the upper split reinforcing rolls 3a and 3b are vertically movable to the upper part of the housing 9. It is supported by the fitted frame 6.

On the other hand, at a position facing the upper work roll 1 with the rolled material 10 interposed therebetween, the lower work roll 4 is supported at both ends by a lower work roll chock 107 which can move up and down. A reinforcing roll 5 is supported by a lower reinforcing roll chock 8 that can move up and down.

That is, the multi-high rolling mill in rolling the rolled material 10 is:
The upper work roll 1 and the lower work roll 4 are pressed and supported by the upper split reinforcing rolls 3a and 3b, the intermediate roll 2 and the lower reinforcing roll 5 so that the upper and lower work rolls 1 and 4 form a predetermined crown shape. The structure is such that the work roll 4 is driven and rotated to pass the rolled material 10.

In addition, a pair of intermediate roll chocks on the non-driven side
Brackets are fixed to 103a, respectively, and these brackets 104 are respectively connected to oscillation devices (not shown).

As shown in FIGS. 3 and 4, an upper work roll chock 101 serving as a bearing box for the upper work roll 1 is provided.
Is supported by a lower work roll chock 107 via a work roll balance 201 provided below the work roll chock 101.

<Problems to be Solved by the Invention> In the above-described rolling mill, there is a possibility that the upper work roll 1 may be unevenly worn due to friction between the upper work roll 1 and the rolled material 10 during rolling.

Therefore, it is necessary to move the installation position of the upper work roll 1 in the roll radial direction in order to prevent uneven wear of the upper work roll 1 and uniformly disperse the wear in the entire roll axial direction. , Work roll balance 20
In order to prevent the work roll 1 from coming off the lower work roll chock 107, the position of the work roll balance 201 does not match the work roll bearing center position 203.

Therefore, an unbalanced moment, which is a couple, acts on the work roll bearing that does not accompany the movement of the work roll 1, and the work roll bearing may be damaged.

The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a roll supporting structure for a multi-high rolling mill in which a work roll balance position and a work roll bearing center position are aligned on the same line. Aim.

<Means for Solving the Problems> A roll supporting structure for a multi-high rolling mill according to the present invention includes a work roll having a shaft end rotatably supported by a work roll chock and rolling in contact with a rolled material, and an intermediate roll outer chock. In a multi-high rolling mill in which a reinforcing roll that presses and supports the outer peripheral surface of the work roll via an intermediate roll that is rotatably supported at the shaft end is disposed on at least one of the rolled material passing surfaces, the work roll chock includes: The installation position of the work roll balance is supported by the intermediate roll outer chock via a work roll balance, and the axial center position of a work roll bearing that supports the shaft end of the work roll in the work roll chock is matched. It is characterized by the following.

<Operation> The reinforcing roll presses the work roll via the intermediate roll to roll the rolled material.

Further, the work roll chock supporting the work roll is supported by the intermediate roll outer chock via the work roll balance, and when the work roll shaft end moves in the roll radial direction, the work roll chock moves while being supported by the intermediate roll outer chock.

Since the installation position of the work roll balance substantially coincides with the center position of the work roll bearing, a bias moment, which is a couple, does not act on the work roll bearing during this movement.

<Embodiment> Figs. 1 and 2 show one embodiment of a roll supporting structure of a multi-high rolling mill according to the present invention, and the present embodiment will be described based on these drawings.

Note that the same members as those described in the related art are denoted by the same reference numerals, and redundant description will be omitted.

Similar to the intermediate roll outer chock 102 located on the upper surface side of the rolled material 10 in FIG. 3 showing the prior art, the intermediate roll outer chock 12 installed in the multi-stage cluster rolling mill is shown in an enlarged scale in FIG. I have.

As shown in this figure, a lower end of a work roll chock 11 rotatably supporting an upper work roll 1 is supported by a lever 14 extending from an intermediate roll outer chock 12 so as to be vertically movable via a work roll balance 13. And
The upper side of the upper work roll 1 has an intermediate roll chock 16
And a pair of intermediate rolls 2 rotatably supported by the intermediate roll outer chock 12 through the intermediate roll 2.

Accordingly, as shown in FIG. 2, the upper work roll 1 and the lower work roll 4 have completely independent structures, and rotatably support the upper work roll 1 in the work roll chock 11. The setting position of the work roll balance 13 can be set to coincide with the axial center position 15 of the bearing.

Therefore, when the one end of the upper work roll 1 is moved in the roll radial direction, the position can be shifted irrespective of the position of the lower work roll chock 107. In this movement, the center position 15 of the bearing is required. , It is possible to prevent the bias moment from acting on the bearing.

In the present embodiment, the work roll chock 11 on the upper work roll 1 side is configured to be supported by the intermediate roll outer chock 12, but the lower work roll side may have the same structure as the present embodiment. Either side of the upper and lower work rolls may have the same structure as in this embodiment.

<Effect of the Invention> According to the roll supporting structure of the multi-high rolling mill of the present invention, the work roll chock is supported by the intermediate roll chock, and the work roll balance position and the work roll bearing center position coincide with each other. The axial position of the roll can be moved irrespective of the other work roll installed opposite to the rolled material,
Further, it is possible to prevent the bias moment from acting on the work roll bearing, and it is possible to eliminate the possibility of bearing damage.

[Brief description of the drawings]

FIG. 1 is an enlarged side view of a main part of an embodiment of a roll supporting structure of a multi-high rolling mill according to the present invention, FIG. 2 is an enlarged front view of the same main part, and FIG. FIG. 4 is an enlarged front view of a main part of a roll supporting structure of a conventional multi-high rolling mill. In the drawing, 1 is an upper work roll, 2 is an intermediate roll, 3a and 3b are upper split reinforcing rolls, 11 and 101 are upper work roll chocks,
102 is an intermediate roll outer chock, 13,201 is a work roll balance, and 15,203 is a center position of a bearing.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shoji Shibata 1 Kimitsu, Kimitsu City, Chiba Prefecture Inside Nippon Steel Corporation Kimitsu Works (72) Inventor Shoichi Kikuchi 1 Kimitsu, Kimitsu City, Chiba Prefecture Nippon Steel Corporation Inside Kimitsu Works, Ltd.

Claims (1)

(57) [Claims] 1. A work roll having a shaft end rotatably supported by a work roll chock and rolling in contact with a rolled material, and an intermediate roll having a shaft end rotatably supported by an intermediate roll outer chock. In a multi-high rolling mill in which a reinforcing roll that presses and supports the outer peripheral surface of the roll is disposed on at least one of the rolled material passing surfaces, the work roll chock is supported by the intermediate roll outer chock via a work roll balance, and A roll support structure for a multi-high rolling mill, wherein an installation position of the work roll balance and an axial center position of a work roll bearing for supporting a shaft end of the work roll in the work roll chock are matched.