JP2528081Y2 - Roll oscillation equipment for rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention prevents uneven wear of a horizontal intermediate roll by a split support roll in a rolling mill having a horizontal intermediate roll and a split support roll connected to a work roll, BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll oscillation device for a rolling mill, which can improve the surface properties (gloss) of a material to be rolled (also referred to as a strip).

(Prior art)

When rolling a material that is difficult to process, various devices have been developed to reduce the rolling load by reducing the diameter of the work roll, and to control the shape of the strip by controlling the shape of the work roll. As one means for achieving this, a method has been used in which the work roll is pressed by a split roll via a horizontal intermediate roll to control the shape of the strip. In that case,
If the split support roll always contacts the horizontal intermediate roll at a fixed position, the horizontal intermediate roll wears unevenly and is transferred from the horizontal intermediate roll to the work roll as it is, and further transferred to the strip to significantly improve the surface properties (gloss). It will make you worse. Therefore, in order to eliminate these adverse effects,
A method of preventing uneven wear of the horizontal intermediate roll by moving the horizontal intermediate roll in the axial direction has been proposed. For example, JP-A-60-240313 (hereinafter referred to as Prior Art I) and JP-A-60-240314 (hereinafter referred to as Prior Art II)
) Proposes a countermeasure for uneven wear of the horizontal intermediate roll in the same mill type to which the present invention is applied, but does not disclose specific means for moving the horizontal intermediate roll in the axial direction. .

JP-A-60-27403 (hereinafter referred to as prior art III)
7, as shown in FIG. 7, a work roll 31 (corresponding to the work roll of the present invention), a pair of intermediate rolls 32 for supporting the work roll 31, a support for the intermediate roll 32, and a split in the body direction. This discloses a configuration in which an intermediate roll is moved by a pinion-rack mechanism in a multi-stage cluster rolling mill in which a plurality of reinforcing rolls 33 are arranged symmetrically with respect to a strip. Japanese Patent Application Laid-Open No. 60-238009 (hereinafter referred to as "prior art IV") also teaches countermeasures against uneven wear of intermediate rolls in a multi-stage cluster rolling mill having the same roll arrangement as in prior art III. A configuration is disclosed in which the intermediate roll is moved in the axial direction integrally with the bearing housing by swinging the ration arm with a reciprocating hydraulic cylinder.

Further, Japanese Unexamined Patent Publication No. Sho 62-214809 (hereinafter referred to as "prior art V") discloses that a work roll 42 offset from a reinforcing roll 41 as shown in FIG. ) Is supported by the split rolls 44 (corresponding to the split support rolls of the present invention), and the uneven roll wear of the horizontal intermediate roll is the same as that of the rolling mill type to which the present invention is applied. It is to be disclosed, the shaft portion of the horizontal intermediate roll is slidably and rotatably inserted into the cylinder cylindrical bearing mounted on the movable frame,
The horizontal intermediate roll is configured to be movable in the axial direction by pressure oil or the like supplied to the cylinder head.

[Problems to be solved by the invention]

As described above, the prior arts I and II do not disclose specific axial moving means of the horizontal intermediate roll.

Further, the prior arts III and IV propose measures against uneven wear of the intermediate roll in the multi-stage cluster rolling mill, which is different from the rolling mill type to which the present invention is applied, and means for moving the intermediate roll in the axial direction. Is disclosed, but means for moving in a direction perpendicular to the axis is not described. Further, the prior art V has the same mill type as that of the present invention, but also discloses an axial moving means of the horizontal intermediate roll in this case, and describes means for moving in the direction perpendicular to the axis. Not.

Generally, the working roll, the intermediate roll, or the horizontal intermediate roll wears as the rolling amount increases, and is polished due to flaws and the like, and the diameter gradually decreases. However, according to the means disclosed in the prior arts III, IV and V, when the diameter of the working roll or the intermediate roll or the horizontal intermediate roll is reduced due to wear or abrasion due to use, the intermediate roll or the horizontal intermediate roll is moved from the split roll to the intermediate roll or the horizontal intermediate roll. Therefore, the pressing force cannot be applied to the work roll in an appropriate state.

In view of the above, an object of the present invention is to provide a roll oscillation device of a rolling mill that can sufficiently cope with a change in roll diameter due to use and prevent uneven wear of a horizontal intermediate roll.

[Means for solving the problem]

To achieve the above object, the roll oscillation device of the rolling mill according to the present invention is a type of rolling mill in which a work roll offset from a reinforcing roll is supported by a split support roll via a horizontal intermediate roll or In a roll oscillation device of a rolling mill attached to a rolling mill of a type in which an intermediate roll is further interposed between a work roll and a reinforcing roll of the rolling mill, the split support roll can be moved in a horizontal direction by pressing means. A hydraulic cylinder for moving the horizontal intermediate roll in the axial direction is provided inside the protrusion of the centering lever which holds the axes of the work roll, the horizontal intermediate roll and the split support roll in the same plane, and is connected to the hydraulic cylinder. The shift block is held by the outer surface of the protrusion and is interposed between the shift block and the horizontal intermediate roll chock. The horizontal intermediate rolls characterized in that it is configured to be moved by the pressing means in the direction connecting the working along the guide surface of the shift block roll, the axis of the horizontal intermediate rolls and split support roll.

[Action]

During the rolling operation, if the horizontal intermediate roll is always reciprocated in the axial direction by the hydraulic cylinder, the contact surface between the split support roll and the horizontal intermediate roll is evenly distributed on the surface of the horizontal intermediate roll, and the surface of the horizontal intermediate roll is worn. Becomes substantially uniform.

When the split support roll is pressed by the pressing means, the split support roll slightly moves in the horizontal direction and comes into contact with the horizontal intermediate roll. The horizontal intermediate roll can be moved in the direction connecting the axis of the split support roll, the horizontal intermediate roll and the work roll. Therefore, even if the work roll or the horizontal intermediate roll is reduced in diameter due to wear or polishing, the split intermediate roll and the horizontal intermediate roll can be moved. Since the contact between the rolls and the contact between the horizontal intermediate roll and the work roll are properly maintained, the shape control of the strip is performed without any problem.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 and FIG. 2 are views showing the roll arrangement of a rolling mill to which the present invention can be applied. FIG.
FIG. 2 shows the case of a so-called 6Hi rolling mill.

In FIG. 1, reference numeral 1 denotes a work roll, which is offset from upper and lower reinforcement rolls 4 and supported by a split support roll 3 divided in a trunk direction via a horizontal intermediate roll 2. The intermediate roll 5 shown in FIG. 2 is added to the upper and lower reinforcing rolls 4 with respect to FIG. 1 and is coaxial with the reinforcing rolls 4 and is in contact with both the reinforcing rolls 4 and the work roll 1. .

FIG. 3 is a sectional view taken along the line AA of FIGS. 1 and 2 and shows a partial cross section. FIG. 4 is a sectional view taken along the line BB of FIG. 3,
FIG. 5 is a sectional view taken along the line CC of FIG. 3, and FIG. 6 is a sectional view taken along the line DD of FIG.

In FIG. 3, each divided support roll 3 and a roll bearing 7 are mounted on a common shaft 6, and the divided support roll 3 is held by a roll bearing 7 and incorporated in a cartridge 8 so as to be movable in a horizontal direction. . An arm 9 is attached to the roll bearing 7 of each split support roll.
Are supported by a supporting bridge 11 via a wedge device 10.

Numeral 12 denotes a centering lever for holding the work roll 1, the horizontal intermediate roll 2 and the divided support roll 3 in the same plane, and a semicircular tip metal fitting 13 of the centering lever 12 engages with the work roll chock 14 so as to be horizontal. The chock 15 of the intermediate roll is connected to a centering lever 12 via a shift block 16, and the centering lever 12 is mounted on the common shaft 6 of the split support roll. A hydraulic cylinder (not shown) is built in the centering lever 12 and is extendable in a direction connecting the axes of the work roll 1, the horizontal intermediate roll 2 and the divided support roll 3. The centering lever 12 is held by a lever bearing 17 mounted on the common shaft 6 and incorporated in the cartridge 8. An arm 9 'is also mounted on the lever bearing 17, and this arm 9' is supported on the supporting bridge 11 via a wedge device 10 '. The wedge device 10 'of the centering lever is connected to the hydraulic cylinder 18' as shown in FIG. 4, and each of the wedge devices 10 of each arm 9 of the roll bearing 7 is also as shown in FIG. Are connected to individual hydraulic cylinders 18.

In FIG. 6, a horizontal intermediate roll chock 15 for rotatably holding a horizontal intermediate roll is provided on a shift block 16 along a guide surface 19 of the shift block 16, a work roll 1, a horizontal intermediate roll 2, and a split support. The roll 3 is fitted so as to be movable in a direction connecting the shaft cores. The shift block 16 is held on the outer surface of the projecting portion 20 of the centering lever 12, and the centering lever 12 has a hydraulic cylinder 21 in the projecting portion 20, and a small-diameter end of a piston rod 22 of the hydraulic cylinder 21. The portion 23 has a threaded portion and is screwed with the shift block with a nut 24. When pressure of high-pressure oil is applied to the hydraulic cylinder 21, the shift block 16 is integrated with the piston rod 22 and the projecting portion is formed. The horizontal intermediate roll 2 is configured to move in the axial direction by moving along the outer surface 20 and pressing the horizontal intermediate roll chock 15.

When the pressure of the high-pressure oil is applied to the hydraulic cylinder 18, a rightward force is applied to the arm 9 in FIG. 5 by the wedge action of the wedge device 10, so that the force transmitted through the roll bearing The divided support roll 3 moves rightward and presses the horizontal intermediate roll 2. Then, the horizontal intermediate roll 2 moves along the guide surface 19 in the direction connecting the work rolls 1, the horizontal intermediate rolls 2 and the split support rolls 3 to the work roll 1, the horizontal intermediate rolls 2
In addition, an appropriate contact state of the divided support rolls 3 is ensured. At this time, the pressure of the high pressure oil is also applied to the hydraulic cylinder 18 ', and a rightward force is applied to the arm 9' in FIG. 4 by the wedge action of the wedge device 10 '. This force applied to the arm 9 'acts on the centering lever 12 via the lever bearing 17, and the work roll 1,
It is shortened in the direction connecting the axis of the horizontal intermediate roll 2 and the divided support roll 3.

The hydraulic cylinder 21 always operates slowly during the rolling operation, and the horizontal intermediate roll is rolling while swinging in the axial direction. If the swing distance of the horizontal intermediate roll is equal to or greater than the gap (shown by d in FIG. 3) between the divided support rolls, uneven wear of the horizontal intermediate roll does not occur.

Further, in the present embodiment, the axis on which the divided support rolls are mounted is a common axis, but by using this as the divided axis, each divided support roll can be individually operated.

[Effect of the invention]

The present invention configured as described above has the following effects.

1) Since the horizontal intermediate roll is always oscillated in the axial direction by the hydraulic cylinder in the centering lever during the rolling operation, uneven wear of the horizontal intermediate roll due to the split support roll does not occur, and the surface properties of the strip (gloss) )
Can be improved.

2) Even when the diameter of the work roll or the horizontal intermediate roll is reduced, the split support roll is moved in the horizontal direction by the pressing means, and the horizontal intermediate roll is connected to the work roll, the horizontal intermediate roll, and the split support roll. By moving the strip in the direction, it is possible to control the shape of the strip while always keeping the contact state between the divided support roll, the horizontal intermediate roll and the work roll in an optimum state.

3) A hydraulic cylinder for moving the horizontal intermediate roll in the axial direction is provided inside the protrusion of the centering lever, and a shift block connected to the hydraulic cylinder is held on the outer surface of the protrusion and interposed between the horizontal intermediate roll chock. Due to the skillful arrangement, the limited movement of the limited space of the rolling mill can be efficiently used to move the "axial movement of the horizontal intermediate roll" and the "axis connecting the work roll, the horizontal intermediate roll and the split support roll." Of the horizontal intermediate roll. "

[Brief description of the drawings]

FIG. 1 is a view showing the roll arrangement of a 4Hi rolling mill to which the present invention is applied, FIG. 2 is a view showing the roll arrangement of a 6Hi rolling mill to which the present invention is applied, and FIG. 3 is a view of FIGS. FIG. 4 is a sectional view taken along line AA, showing a partial cross section, FIG. 4 is a sectional view taken along line BB of FIG. 3, FIG. 5 is a sectional view taken along line CC of FIG. 3, and FIG. 3 is a sectional view taken along the line D-D in FIG. 3, FIG. 7 is a view showing a conventional roll arrangement, and FIG. 8 is a view showing another conventional roll arrangement. 1 work roll, 2 horizontal intermediate roll, 3 split support roll, 4 reinforcing roll, 5 intermediate roll, 6
... common shaft, 7 ... roll bearing, 8 ... cartridge,
9 ... arm, 9 '... arm, 10 ... wedge device,
10 ': Wedge device, 11: Supporting bridge, 12: Centering lever, 13: Tip bracket, 14 ...
… Work roll chock, 15… Horizontal middle roll chock, 16… Shift block, 17… Lever bearing, 18 ……
Hydraulic cylinder, 18 ': Hydraulic cylinder, 19: Guide surface, 20: Projection, 21: Hydraulic cylinder, 22: Piston rod, 23: Tip, 24: Nut, 31: Work roll , 32 ... Intermediate roll, 33 ... Reinforcement roll, 41 ...
... Reinforcing roll, 42 ... Work roll, 43 ... Intermediate roll,
44 …… Split roll

Claims (1)

(57) [Scope of request for utility model registration] 1. A rolling mill of a type in which a work roll offset with respect to a reinforcing roll is supported by a split support roll via a horizontal intermediate roll, or a further intermediate between a work roll and a reinforcing roll of the rolling mill. In a roll oscillation device of a rolling mill attached to a rolling mill of a type in which a roll is interposed, the split support roll is configured to be movable in a horizontal direction by pressing means, and the work roll, a horizontal intermediate roll, and a split support roll are provided. A hydraulic cylinder for moving the horizontal intermediate roll in the axial direction is housed in the protrusion of the centering lever that holds the axis in the same plane, and the shift block connected to the hydraulic cylinder is held by the outer surface of the protrusion and the horizontal intermediate The horizontal intermediate roll is interposed between the roll block and the work chock along the guide surface of the shift block. A roll oscillation device for a rolling mill, wherein said roll oscillation device is configured to be movable by said pressing means in a direction connecting the axes of said rollers, horizontal intermediate rolls and split support rolls.