JP2596958B2 - Roll oscillation equipment for rolling mill - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a roll oscillation device of a rolling mill for preventing roll marks on a material to be rolled.

<Prior Art> FIG. 4 shows an example of a roll group arrangement of a multi-stage cluster rolling mill. As shown in FIG. 4, in this rolling mill, work rolls are provided above and below the threading surface of the band W, respectively.
11 and a pair of intermediate rolls supporting this work roll 11
12 and divided reinforcing rolls 13 and 14 that support the intermediate roll 12 and are divided in the roll axis direction. In a rolling mill having such split reinforcing rolls 13 and 14, a linear or band-shaped roll mark is generated on the roll peripheral surface of the intermediate roll 12 during rolling due to the support of the split reinforcing rolls 13 and 14. There is a problem that the roll mark is transferred to the belt W via the work roll 11. Therefore, in this type of rolling mill, a roll oscillation device is provided to reciprocate (roll oscillation) the intermediate roll 12 in the roll axis direction during rolling to prevent the occurrence of roll marks.

FIG. 5 and FIG. 6 show this conventional roll oscillation device. FIG. 5 is a partially cutaway side view, and FIG. 6 is a sectional view taken along line VI-VI of FIG. As shown in FIGS. 5 and 6, a pair of upper and lower outer chock 16 is vertically movably fitted in the housing 15 on the working side.
An inner chock 18 for pivotally supporting the intermediate roll 12 is inserted into a square hole 17 formed to penetrate in the roll axis direction so as to reciprocate in the roll axis direction. Further, a work roll chock 19 which supports the work roll 11 is fitted inside each outer chock 16 so as to be vertically movable. The outer chock 16 is detachably fixed in the roll axis direction by a chock clamp 21 mounted on the housing 15 so as to be movable in the horizontal direction by an actuator (not shown).

An oscillation block 22 is fixed to the inner chock 18 that supports each intermediate roll 12. One end of this oscillation block 22 is a square hole of the outer chock 16
At the end, a rectangular holding hole 23 is formed in the vertical direction. On the other hand, a reinforcing roll frame 24 that supports the divided reinforcing rolls 13 and 14 is vertically movably fitted to the housing 15 on the rolling mill working side and the housing on the same driving side (not shown). This reinforcement roll frame
A reversing pin 25 for maintenance work protrudes from the working and drive side end surfaces of the working side 24 and the reversing pin 25 on the working side.
A box-shaped oscillation frame 26 is detachably fixed to the end face of the reinforcing roll frame 24 so as to cover the frame. A saddle 27 protrudes from a lower surface of the oscillation frame 26, and a pair of L-shaped levers 29 are pivotally supported on a shaft 28 fixed to the saddle 27, respectively. Rollers 30 are supported at one end of these levers 29, respectively.
Are loosely fitted in the holding holes 23 of the oscillation block 22, respectively. A pair of hydraulic actuators 31 are supported on side surfaces of the oscillation frame 26, and the rod forks 32 are each pivotally connected to the other end of the lever 29.

In the drawing, only the roll oscillation device above the threaded surface of the belt W is shown, but the roll oscillation device below is configured similarly.

In such a configuration, when rolling the belt W,
The upper and lower work rolls 11 are lowered to a predetermined interval, and the intermediate roll 12 is driven and rotated to rotate the work roll 11 and the divided reinforcing rolls 13 and 14. Then, the two hydraulic actuators 31 are operated in opposite directions to rotate the lever 29 in opposite directions, and the two intermediate rolls 12 are relatively oscillated via the oscillation block 22. still,
This relative oscillation cancels each other's thrust forces, thereby preventing the unilateral thrust force from acting on the work roll 11.

Next, when changing the work roll 11 and the intermediate roll 12, the upper and lower reinforcing roll frames 24 are respectively raised and lowered, and the divided reinforcing rolls 13 and 14 are separated from the intermediate roll 12, and at the same time, the roller 30 of the lever 29 is moved. Pull out from the holding hole 23 of the oscillation block 22. Subsequently, the two chock clamps 21 are moved outward in the horizontal direction to release the fixing of the outer chock 16, and the intermediate roll 12 is pulled out of the housing 15 together with the outer chock 16 by a roll changing device (not shown).

When changing the split reinforcing rolls 13 and 14, use a choke clamp (not shown) to
The fixing of the 24 to the housing 15 in the roll axis direction is released, and the divided reinforcing rolls 13 and 14 are pulled out of the housing 15 together with the reinforcing roll frame 24.

<Problems to be Solved by the Invention> However, in the above-described conventional roll oscillation device, the hydraulic actuator 31 for performing the roll oscillation of the intermediate roll 12 is mounted on the oscillation frame 26 fixed to the reinforcing roll frame 24. Because
When reassembling the split reinforcing rolls 13, 14, it is necessary to attach / detach a hydraulic hose for the hydraulic actuator 31, a pipe or an electrical wiring connector for an oscillation sensor, etc. Has become an obstacle to speeding up.

In addition, the reversing pin 25 is used when reversing the upper reinforcing roll frame 24 removed by the roll rearrangement on the reversing table for its maintenance, but conventionally the reversing pin 25 is covered by the oscillation frame 26. Therefore, prior to its use, it was necessary to remove the oscillation frame 26 from the reinforcing roll frame 24.

The present invention has been made to solve the problems of the conventional roll oscillation device as described above, and has as its object to provide a roll oscillation device of a rolling mill that facilitates maintenance such as roll changing work. I have.

<Means for Solving the Problems> A roll oscillation device for a rolling mill according to the present invention that solves the above-described problems includes a work roll, an intermediate roll supporting the work roll, and supporting the intermediate roll. In a rolling mill, a roll group consisting of a plurality of divided reinforcing rolls and a plurality of divided reinforcing rolls arranged in the roll axis direction is vertically arranged with a rolled material passing surface interposed therebetween, and the outer chocks of the upper and lower intermediate rolls are clamped to a housing. An oscillation actuator is mounted on the choke clamp, and the actuator is detachably connected to the upper and lower divided reinforcing roll frames via a drive lever.

<Operation> By operating the oscillation actuator, the upper and lower intermediate rolls reciprocate in the roll axis direction via the mechanical connecting means. On the other hand, since the oscillation actuator is mounted on the choke clamp, the reinforcing roll frame that supports the divided reinforcing roll can be isolated from the piping and wiring of the oscillation actuator, thereby eliminating the work of attaching and detaching the piping and wiring. The reinforcement roll frame can be attached and detached.

Embodiment An embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a partially cutaway side view of one embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a sectional view taken along line III-III of FIG. In FIGS. 1 to 3, the same members as those of the related art described above are denoted by the same reference numerals, and redundant description will be omitted.

As shown in FIGS. 1 to 3, a pair of chock clamps 41 for clamping the outer chock 16 supporting the work roll 11 and the intermediate roll 12 to the housing 15 are provided with a belt W.
1 are movably arranged in the horizontal direction indicated by arrows in FIG. These chock clamps 41 are driven by a hydraulic actuator (not shown) .The upper and lower outer chock 16 are clamped by moving outward so as to be separated from each other, while moving closer to each other inward. By moving, the chock clamp 41 abuts against the side surfaces of the upper and lower outer chock 16 to clamp it. Hydraulic cylinders 42 are formed integrally with these choke clamps 41, respectively. A piston 43 is slidably mounted in the hydraulic cylinder 42 along the roll axis direction to form an oscillation actuator. I have. The outer shape of the hydraulic cylinder 42 has a prismatic shape, and a fork 46 having a bifurcated portion 44 at the top and bottom and a square hole 45 formed at the center is slidably fitted therein. Is connected to a rod end 48 of the piston 43 via a fork end 47 fixed to a fork 46, and is driven by the operation of the piston 43.

On the other hand, bearings are provided on the side end surfaces of the upper reinforcing roll frame 49 and the lower reinforcing roll frame 50 via brackets 51, respectively.
The upper and lower reinforcing roll frames 49 and 50 are coaxially mounted on the bearings 52 and 53 on the input side and the output side, respectively. 56 and 57 are supported. A driving lever 58 is provided on each of the rotating shafts 54 to 57.
And an operating lever 59 are fixed at the same angular position, and rollers 60 and 61 are pivotally attached to their distal ends. Of the rotating shafts 54 to 57 attached to the upper reinforcing roll frame 49 and the lower reinforcing roll frame 50, the roller 60 of the drive lever 58 of the pair of upper and lower rotating shafts 54, 56 located on the entrance side of the obi W is ,
As shown in FIG. 2, the upper and lower forked portions 44 of the entry side fork 46
As shown in FIG. 3, the rollers 61 of the operating lever 59 are loosely fitted into the holding holes 23 of the oscillation block 22 of the upper and lower intermediate rolls 12, respectively. Similarly, a pair of upper and lower rotating shafts located on the exit side of the belt W
The roller 60 of the drive lever 58 of 55,57
The roller 61 of the operating lever 59 is connected to the intermediate roll 12 on the exit side.
Is loosely fitted to the oscillation block 22.

In addition, reversing pins 62 are protrudingly provided on the working-side and drive-side side end surfaces of the upper reinforcing roll frame 49, respectively.

In such a configuration, when rolling the belt W, when the inlet and outlet oscillation actuators including the cylinder 42 and the piston 43 are operated in opposite directions,
The rotating shafts 54, 56 and 55, 57 on the entrance side and the exit side via the drive lever 58
Are rotated in opposite directions, and this rotation causes the operating lever 59 to rotate.
, The input and output oscillation blocks 22 are driven. As a result, the upper and lower intermediate rolls 12 are roll-oscillated at the same speed in the opposite directions on the entrance side and the exit side.

Further, when the work roll 11 and the intermediate roll 12 are rearranged, when the outer and inner chock clamps 41 are moved outward so as to separate from each other and the outer chock 16 is released, , The roller 60 of the drive lever 58 is released. Next, the upper and lower reinforcing roll frames 49 and 50 are moved up and down, respectively, and a spacer (not shown) is inserted between them.
61 is pulled out from the holding hole 23 of the oscillation block 22,
Then, the upper and lower reinforcing roll frames 49, 50 are detached from the housing 15. In this case, the upper and lower reinforcing roll frames 49, 50
By simply pulling out the rollers 60 and 61 from the fork 46 and the oscillation block 22, respectively, they can be easily separated from the others, and the work of attaching and detaching the hydraulic piping and the like of the oscillation actuator as in the related art is unnecessary. Further, since the inversion pin 62 is also provided separately from the oscillation device, the inversion pin 62 can be used immediately.

<Effects of the Invention> As described above in detail with reference to one embodiment, according to the present invention, the oscillatory actuator that oscillates the intermediate roll is mounted on the choke clamp that clamps the outer chock on the housing, and the actuator is vertically moved. The drive lever is detachably connected to the roll frame of the split reinforcing roll, so no hydraulic piping for the oxylation actuator, wiring for the stroke sensor, etc. are required on the reinforcing roll frame. It can be greatly simplified. In addition, since the oscillation actuator is not mounted on the reinforcing roll frame, there is ample space for disposing the reversing pin on the side end surface of the reinforcing roll frame, and the reversing pin can be always used so that maintenance can be performed. In this case, it is possible to quickly reverse the reinforcing roll frame. In addition, since the upper and lower intermediate rolls are driven by one oscillation actuator, the structure of the entire apparatus can be simplified.

[Brief description of the drawings]

1 is a partially cutaway side view of one embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, and FIG. Layout drawing of the roll group of the cluster rolling mill,
FIG. 5 is a partially cutaway side view of a conventional roll oscillation device, and FIG. 6 is a sectional view taken along line VI-VI of FIG. In the drawing, 11 is a work roll, 12 is an intermediate roll, 13, 14 is a split reinforcing roll, 15 is a housing, 16 is an outer chock, 22 is an oscillation block, 41 is a chock clamp, 42 is a hydraulic cylinder, 43 is a piston, 46 Is a fork, 49 and 50 are reinforcing roll frames, 54 to 57 are rotating shafts, 58 is a driving lever, and 59 is an operating lever.

Continuation of the front page (72) Inventor Kazutoyo Arita 4-6-22 Kanon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Yoshinori Mito 4-6-kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima 22 Hiroshima Works, Mitsubishi Heavy Industries, Ltd. (72) Inventor Akihiko Fukuhara 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works, Ltd. (72) Inventor Tomio Komatsu 1-Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel (72) Inventor Yasuhiro Yamada 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd.Chiba Works

Claims (1)

(57) [Claims] A roll group consisting of a work roll, an intermediate roll supporting the work roll, and a split reinforcing roll supporting the intermediate roll and divided into a plurality of rolls in a roll axis direction is formed by a rolling material passing surface. An oscillation actuator is mounted on a choke clamp for clamping an outer chock of the upper and lower intermediate rolls to a housing, and the actuator is a roll of the upper and lower split reinforcing rolls. A roll oscillation device for a rolling mill, which is detachably connected to a frame via a drive lever.