JPH01181908A - Roll oscillating apparatus for rolling mill - Google Patents

Abstract

PURPOSE:To simplify an attaching and detaching work for rearranging a split type reinforcing roll by connecting an actuator to oscillate an intermediate roll to upper and lower intermediate rolls freely attachably and detachably by a mechanical connecting means. CONSTITUTION:In the stage of rearranging the work roll 11 and intermediate roll 12, inlet and outlet sides chock clamps 41 are moved outward to separate each other, then the clamp of the outer chock 16 is released. At the same time, a roller 60 of a driving lever 58 is left from a branch part of a fork 46. Then, the upper and lower reinforcing roll frames 49, 50 are moved up and down respectively and a spacer is inserted therebetween, a roller 61 of an operating lever 59 is taken out from retaining holes 23 of oscillating blocks 22 and the upper and lower reinforcing roll frames 49, 50 are extracted from a housing 15. In this case, the upper and lower reinforcing roll frames 49, 50 only extract the rollers 60, 61 from the fork 46 and oscillating brocks 22 respectively, and are easily separated from others.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a roll oscillation device for a rolling mill that prevents roll marks on a rolled material.

<Prior Art> FIG. 4 shows an example of the arrangement of roll groups in a multi-stage cluster rolling mill. As shown in FIG. 4, in this rolling mill, work rolls 1 are placed above and below the threading surface of the strip W, respectively.
1, a pair of intermediate rolls 12 that support this work roll 11, and divided reinforcing rolls 13 and 14 that support this intermediate roll 12 and are divided in the roll axis direction are arranged. In a rolling mill having such split reinforcing rolls 13 and 14, linear or band-like roll marks are generated on the roll 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 mark is transferred to the steel strip W via the work roll 11.

Therefore, in this type of rolling mill, a roll oscillation device is provided to move the intermediate roll 12 back and forth in the roll axis direction during rolling (0-route oscillation) to prevent the occurrence of roll marks.

This conventional roll oscillation device is shown in FIGS. 5 and 6. Figure 5 is a partially cutaway side view, Figure 6 is the 5th
It is a VI-M sectional view of a figure. As shown in FIGS. 5 and 6, a pair of upper and lower outer chocks 16 are fitted into the housing 15 on the working side so as to be movable up and down, and a square hole 17 is formed through the outer chocks 16 in the roll axis direction. An inner chock 18 that pivotally supports the intermediate roll 12 is inserted therein so as to be able to reciprocate in the roll axis direction. moreover,
Inside each outer chock 16 is the work roll 11.
Work roll chocks 19 that pivotally support the work rolls are respectively fitted so as to be movable up and down.

The outer chock 16 is removably fixed in the roll axis direction by a chock clamp 21 which is 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 each inner chock 18 that pivotally supports each intermediate lever 12. One end of this oscillation block 22 is connected to the outer chock 1.
It protrudes to the outside from the square hole 17 of No. 6, and a square holding hole 23 is vertically bored at the end thereof. on the other hand,
A reinforcing roll frame 24 that pivotally supports the split reinforcing rolls 13 and 14 is fitted in a housing 15 on the working side of the rolling mill and a housing on the driving side (not shown) so as to be vertically movable.

A reversing pin 25 for maintenance work is provided protruding from the side end surfaces of the working side and the driving side of the reinforcing roll frame 24, and a box-shaped oscillation frame 26 is provided to cover the reversing pin 25 on the working side. It is removably fixed to the end face of the frame 24. A saddle 27 is protruded from the lower surface of the oscillation thin frame 26.
A pair of L-shaped levers 29 are each pivotally supported on a shaft 28 fixed to the lever 7 . A roller portion 30 is pivotally supported at one end of each of these levers 29, and these rollers 30 are loosely fitted into the holding holes 23 of the oscillation block 22, respectively. Further, a pair of hydraulic actuators 31 are supported on the side surfaces of the oscillation frame 26, and each rod fork portion 32 is pivotally attached to the other end of the lever 29.

Although only the four-roll oscillation device above the threading surface of the strip W is shown in the drawing, the roll oscillation device below is also constructed in the same manner.

In such a configuration, when rolling the steel strip W, the upper and lower work rolls 11 are rolled down to a predetermined interval, and the intermediate roll 12 is driven and rotated to roll the work roll 11 and the divided reinforcing four rolls 13 and 14. Rotate. Then, both hydraulic actuators 31 are operated in mutually opposite directions to rotate the levers 29 in mutually opposite directions, thereby relatively oscillating both intermediate quantity levers 12 via the oscillation block 22.

Note that this relative oscillation cancels out the thrust forces with each other and prevents a unilateral thrust force from acting on the work roll 11.

Next, when rearranging the workpiece roll 11 and the intermediate roll 12, the upper and lower reinforcing roll frames 24 are raised and lowered, respectively, and each divided reinforcement roll 13, 14 is pulled away from the intermediate roll 12, and at the same time the lever 29 The roller 30 is pulled out from the holding hole 23 of the oscillation block 22.

Subsequently, both chock clamps 21 are moved outward in the horizontal direction to release the fixation of the outer chock 16, and the intermediate chock 12 is removed by a four-wheel rearrangement device (not shown).
from the housing 15 together with the yoke 16.

In addition, when rearranging the split reinforcing rolls 13 and 14,
The fixation of the reinforcing roll frame 24 to the housing 15 in the roll axis direction is released by a chock clamp (not shown), and the divided M strong rolls 13 and 14 are pulled out from the housing 15 together with the reinforcing roll frame 24.

<Problems to be Solved by the Invention> However, in the conventional glue oscillation control device described above, the hydraulic actuator 31 for roll oscillating the intermediate roll 12 is attached to the oscillation frame 26 fixed to the reinforcing roll frame 24. Therefore, when reassembling the split reinforcing rolls 13 and 14, it is necessary to attach and detach the hydraulic hose for the hydraulic actuator 31, the piping, the electrical wiring connector for the oscillation sensor, etc. This is an obstacle to speeding up replacement work.

In addition, the reversing pin 25 is used when reversing the upper reinforcing roll frame 24, which has been removed due to roll recombination, on an inverting table for maintenance.
5 is covered by the oscillation frame 26, it is necessary to remove the oscillation frame 26 from the reinforcing roll frame 24 before using the oscillation frame 26.

The present invention solves the problems in conventional roll oscillation devices as described above, and aims to provide a roll oscillation device for a rolling mill that facilitates maintenance such as roll rearrangement work. There is.

A four-wheel oscillation device for a rolling mill according to the present invention that solves the above-mentioned problems includes a work roll, an intermediate roll that supports the work roll, and an intermediate roll that supports the intermediate roll. In a rolling mill in which four groups of reinforcing rolls each consisting of supporting rolls and split reinforcing rolls divided into a plurality of rolls in the axial direction of the rolls are disposed above and below the rolling surface of the material to be rolled, an outer chock of the upper and lower intermediate rolls is used. An oscillation true actuator is mounted on a chock clamp for clamping the housing to the housing, and the actuator is detachably connected to the upper and lower intermediate rolls via mechanical connection means.

Function> By operating the oscillation actuator, the upper and lower intermediate rolls reciprocate in the roll axis direction via mechanical coupling means. On the other hand, since the oscillation actuator is mounted on a chock clamp, the reinforcing roll frame that pivotally supports the split reinforcing roll can be isolated from the piping and wiring of the oscillation actuator, thereby eliminating the need to attach or remove the piping and wiring. The reinforcing roll frame can be attached and detached.

Embodiment Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a partially cutaway side view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line -■ in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line II in FIG. In addition, in FIGS. 1 to 3, the same members as those in the prior art described above are given the same reference numerals, and redundant explanation will be omitted.

As shown in FIGS. 1 to 3, a pair of chock clamps 41 are used to clamp the outer chock 16 that supports the work roll 11 and the intermediate roll 12 to the housing 15.
are disposed on the inlet and outlet sides of the steel strip W so as to be movable in the horizontal direction indicated by arrows in FIG. 1, respectively.

These chock clamps 41 are driven by a hydraulic actuator (not shown), and by moving them outwardly away from each other, the clamps of the upper and lower outer chocks 16 are released, while they are moved inwardly toward each other. By moving the chock clamp 41
come into contact with the sides of the upper and lower outer clicks 16 and clamp them. These chock clamps41. A hydraulic cylinder 42 is integrally formed in each of the rollers, and a piston 43 is inserted into the hydraulic cylinder 42 so as to be slidable along the roll axis direction, thereby forming an oscillation actuator. The hydraulic cylinder 42 has a prismatic outer shape, and a fork 46 having upper and lower bifurcated portions 44 and a square hole 45 in the center is slidably fitted therein. is connected to a rod end 48 of a 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 52 and 53 are fixed to the side end surfaces of the upper reinforcing roll frame 49 and the lower reinforcing roll frame 50 via brackets 51, respectively. frame 5
0, a total of four rotation shafts 54, 55, 56, and 57 are coaxially supported, two on the entry side and two on the exit side. Each rotation shaft 54 to 57 has a drive lever 58 and an actuation lever 5.
9 are fixed at the same angular position, and rollers 60 and 61 are respectively pivotally attached to their tip ends. Among the rotating shafts 54 to 57 attached to the lower reinforcing roll frame 49 and the lower reinforcing roll frame 50, the roller 60 of the driving lever 58 of the pair of upper and lower rotating shafts 54 and 56 located on the entrance side of the steel strip W is , as shown in FIG. 2, are loosely fitted into the upper and lower forks 44 of the fork 46 on the entry side, and the rollers 61 of the actuating lever 59 are respectively fitted on the upper and lower forks 44 on the entry side, as shown in FIG. Oscillation block 2 of upper and lower intermediate four-wheels 12
It is loosely fitted into the holding hole 23 of No. 2. Similarly, the appearance of the strip W -
The roller 60 of the drive lever 58 of the pair of upper and lower rotating shafts 55 and 57 located on the side is loosely fitted into the output side nofolk 46, and the sailor 61 of the operating lever 59 is loosely fitted into the oscillation block 22 of the intermediate roll 12 on the output side. has been done.

Reversing bins 62 are provided protruding from the side end surfaces of the working side and the driving side of the upper reinforcing roll frame 49, respectively.

In this configuration, when rolling the steel strip W, when the oscillation actuators on the entry side and the exit side, which are composed of the cylinder 42 and the piston 43, are operated in opposite directions, the oscillation actuators on the entry side and the exit side are operated via the drive lever 58. Exit side rotation axis 54°5
6, 55, and 57 rotate in opposite directions, and this rotation drives the inlet and outlet oscillation blocks 22 via the operating lever 59. As a result, the upper and lower intermediate rolls 12 oscillate at the same speed in opposite directions on the entry side and the exit side.

In addition, when rearranging the work roll 11 and the intermediate roll 12, the chock clamps 41 on the entry side and the exit side are moved to the outside so as to separate from each other, and the outer chock 16
When the clamp is released, the roller 60 of the drive lever 58 is simultaneously removed from the bifurcated portion 44 of the fork 46. Next, move the upper and lower reinforcing roll frames 49 and 50 up and down, insert a spacer (not shown) between them, and pull out the operating lever 59 (7) and the roller 61G from the holding hole 23 of the oscillation block D 22, and then Then, the upper and lower reinforcing roll frames 49 and 50 are removed from the housing 15. In this case, the upper and lower reinforcing roll frames 49 and 50 are
0 and 61 can be easily separated from the others by simply pulling them out from the fork 46 and oscillation block 22, respectively.
There is no need to attach or detach the oscillation actuator's hydraulic piping, etc., as in the past. Further, since the reversing bin 62 is also provided separately from the oscillation device, the reversing bin 62 can be used immediately.

<Effects of the Invention> As described above in detail with reference to one embodiment, according to the present invention, an oscillating actuator for oscillating an intermediate roll is mounted on a tilt clamp that clamps an outer shaft to a housing, and the actuator Since it is removably connected to the upper and lower intermediate rolls by a mechanical connection means, there is no need for hydraulic piping for the oscillation actuator, wiring for the stroke sensor, etc. on the reinforcing roll frame, making it possible to reduce the burden of these additional tasks when rearranging split reinforcing rolls. It can be greatly simplified.

In addition, since the oscillation actuator is not attached to the reinforcing roll frame, there is sufficient space for arranging the reversing pin on the side end surface of the reinforcing roll frame, and the reversing pin can always be used. It becomes possible to quickly reverse the reinforcing roll frame during maintenance. Furthermore, since the upper and lower intermediate rolls are driven by one oscillation actuator, the structure of the entire apparatus can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of an embodiment of the present invention, Fig. 2 is a sectional view taken along If-It in Fig. 1, Fig. 3 is a sectional view taken along I-I in Fig. 1, and Fig. 4 is a multi-stage sectional view. FIG. 5 is a partially cutaway m-sectional view of a roll oscillation device according to a conventional example, and FIG. 6 is a cross-sectional view taken along the line -M in FIG. 5. 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 sill, 43 is a piston, 46 is a fork, 49.50 is a reinforced roll frame, 54 to 57 are rotating shafts, 58 is a drive lever, and 59 is an operating lever.

Claims (1)

[Claims] A roll group consisting of a work roll, an intermediate roll that supports the work roll, and a divided reinforcing roll that supports the intermediate roll and is divided into a plurality of parts in the roll axis direction is vertically sandwiched between the rolling material passing surface. In the installed rolling mill,
An oscillation actuator is mounted on a chock clamp that clamps the outer chocks of the upper and lower intermediate rolls to the housing, and the actuator is detachably connected to the upper and lower intermediate rolls via a mechanical connection means. A roll oscillation device for a rolling mill featuring: