JPH01154803A - Multiroll mill - Google Patents

Abstract

PURPOSE:To rapidly perform changing work in a rolling mill and to improve the productivity by integrally changing a roll assembly as a cartridge consisting of small work rolls and intermediate rolls for work rolls in the multiroll mill. CONSTITUTION:A four-high rolling mill is constructed by inserting roll chock parts 5, 6 of work rolls 1, 2 supported by vertical bending devices 12, 13 installed on a block 11 and roll chocks 9, 10 of backup rolls 7, 8 into a window part 4 of a housing 3 to be freely movable in the vertical direction. If the mill is changed to be a five-high mill, the work roll 1 is pulled out together with the roll chock 5 in the work side. Then, a roll assembly 16 as a cartridge structure consisting of an intermediate roll 18, its roll chock 17 and a small roll 27, its roll chock 28 is inserted. Further, a horizontal bending device consisting of a support roll 19 segmented into the required number of pieces and an intermediate support roll 25 is assembled. Changing to a four-high, five-high, or six-high mill is performed in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-high rolling mill in which rolls can be rearranged into four, five or six stages.

[Prior Art] It is known that reducing the diameter of work rolls reduces the rolling load and rolling torque, making it possible to easily roll materials that were conventionally considered difficult, such as difficult-to-process materials and ultra-thin materials. For this reason,
In recent years, 4-high and 5-high rolling mills have been used as 4-high rolling mills when rolling ordinary mild steel plates, and as 5-high rolling mills when rolling difficult-to-process materials, ultra-thin materials, etc. Various multi-high rolling mills that can be rearranged have been considered.

[Problems to be Solved by the Invention] However, in the above-mentioned multi-high rolling mill, when the rolling mill is of a type that imparts horizontal bending to small-diameter work rolls as a 5-high rolling mill, the intermediate roll supporting the rolling load is Support rolls and intermediate support rolls are required to give horizontal bending to work rolls with different diameters, and if these rolls are reassembled one by one, the problem is that it takes a long time to reassemble the rolls and the line stop time increases. be.

The present invention has been made in view of the above-mentioned circumstances, and has an object of making it possible to perform the rearrangement work quickly when rearranging a rolling mill into four or five stages.

[Means for Solving the Problems] The present invention provides a four-high rolling mill equipped with a pair of upper and lower work rolls and a pair of upper and lower backup rolls for backing up the work rolls, or at least one of the pair of upper and lower work rolls. Either a 5-high or 6-high rolling mill equipped with a horizontal bending device that makes the work roll a small-diameter work roll and interposes an intermediate roll between the small-diameter work roll and a backup roll to horizontally bend the small-diameter work roll. In a multi-high rolling mill that can be rearranged, a roll assembly including a small-diameter work roll and an intermediate roll is configured as a cartridge that can be integrally rearranged.

[Function] When changing the number of roll stages, the roll assembly including the small-diameter work roll and the intermediate roll is integrally changed as a cartridge, so that the roll change is quickly performed.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention.

FIG. 1 shows an example in which the multi-high rolling mill of the present invention is a four-high rolling mill, in which a pair of upper and lower work rolls 1.2 are rotatably fitted into work roll chocks 5.6, and the work roll chocks 5, 6 are It is fitted into the window portion 4 of the rolling mill housing 3 so as to be movable up and down.

The upper and lower pair of backup rolls 7.8 that back up the work rolls 1 and 2 are connected to a backup roll chock 9.8. The backup roll chock 9. is rotatably fitted to the IO. The lO is fitted into the window portion 4 so as to be able to move up and down.

Vertical bending devices 12.13 are attached to the upper and lower parts of the block 11 fixed to the inside of the window portion 4, so that vertical bending can be applied to the work roll 1.2 via the work roll chock 5.6. Further, at the upper and lower portions of the rolling mill housing 3, a rolling screw 14 and a pulling device (not shown) for raising and lowering the backup roll 7.8 via backup roll chocks 9 and 10 are provided.
and a reduction cylinder 15 are provided.

2 to 4 show examples in which the multi-high rolling mill of the present invention is a five-high rolling mill, and numeral 16 in FIG. 2 is a cartridge-structured roll assembly disposed above the work roll 2.

The details of the roll assembly 1B will be explained with reference to FIGS. 3 and 4. An intermediate roll 18 is rotatably fitted into an intermediate roll chock 17 that is fitted into the window part 4 so as to be able to rise and fall freely, and the intermediate roll chock 17 is a vertical bending device. 12.

A plurality of split support rolls 19 are arranged at predetermined intervals in the roll axis direction in front or behind the intermediate roll 18 in the rolling material progress direction, and the split support rolls 19 are rotatably attached to a bracket 20.

Support member 2 connected to left and right intermediate roll chocks 17
1, a horizontal bending cylinder 22 is attached corresponding to each split support roll 19, and the horizontal bending cylinder 22 moves the split support roll 19 through the bracket 20 in a direction parallel to the rolling material traveling direction when viewed from above. It is designed so that it can be pushed and pulled.

A guide member 23 is fixed to the tips of the brackets 20 at both ends on the intermediate roll chock 17 side, and an intermediate support roll 25 is pushed by the split support roll 19 into a groove 24 extending diagonally downward in the guide member 23. It is inlaid to obtain.

Intermediate roll L8 lower 11 of intermediate roll chock 17:
A recess 2B is provided, and a small-diameter work roll chock 28, into which a small-diameter work roll 27 is rotatably fitted, is fitted into the recess 26 so as to be able to rise and fall and move in a direction parallel to the rolling material progress direction. There is. Each roll 19.2
The center of 5.27 is approximately on a straight line, and the small diameter work roll 27 is in contact with the intermediate roll 18 and also with the intermediate support roll 25, and the horizontal bending cylinder 2
2 gives horizontal bending.

Horizontal bending cylinder 2 of intermediate roll chock 17
A through hole 29 extending in the direction of the roll axis is bored in the part where the second part is not provided, and a bearing 30 fitted in the through hole 29 has one end extending in the direction of the roll axis and having one end connected to the work side 31 of the rolling mill. A power transmission shaft 32 protruding from the shaft is rotatably fitted, and a drive device 34 is connected to the end of the power transmission shaft 32 on the work side 31 side via a universal joint 33. The drive device 34 is attached to a frame 35 that projects outward from the intermediate roll chock 17.

A recess 3 is provided below the through hole 29 of the intermediate roll chock 17.
7 is provided, and a worm wheel 39 whose axis extends in the rolling line direction is rotatably fitted into the bearing 38 fitted into the recess 37, and the worm wheel 39 is connected to the worm wheel 36 provided on the power transmission shaft 32. They mesh together.

A screw shaft 40 extending in a direction perpendicular to the small-diameter work roll 27 is screwed into the female thread provided in the hollow part of the worm wheel 39, and the movement of the screw shaft 40 back and forth causes the small-diameter work roll to be inserted through the small-diameter work roll chock 28. 27 can be offset in a direction parallel to the rolling material traveling direction.

In the figure, 41 is a keeper plate, and 42 is a stopper.

When used as a four-high rolling mill, the arrangement of each roll is as shown in Fig. 1, and the work rolls 1 and 2 are given vertical bending by vertical bending devices 12 and 13 for rolling. It will be done.

When changing from a 4-high rolling mill to a 5-high rolling mill, first remove the keeper plate, etc., and raise the backup roll 7 via the backup roll chock 9 using a lifting device, and use the rolling cylinder 15 to lift the backup roll 7 via the backup roll chock 10. and backup roll 8,
Also, the work roll 2 is passed through the work roll chock 6,
Work roll 1 and backup roll 7 are lowered respectively.
and between the work rolls 1 and 2, insert a known roll changing device such as a porter bar into the rolling line from the work side 31 direction, and use the roll changing device to change the work roll 1 to the workpiece. roll chock 5
and pull it out to the work side 31 side.

Next, the roll assembly 16 having a cartridge structure prepared in advance is inserted into the rolling line from the work side 31 using a roll changing device, and the keeper plate 41 is inserted into the rolling line from the work side 31.
When attached to the rolling mill housing 3, a five-high rolling mill is immediately constructed. The drive device 34 may be incorporated together with the roll accessory 211, or may be attached to the frame 35 and connected to the universal joint 33 after the roll assembly 16 has been inserted into the rolling line.

When used as a 5-high rolling mill, first, drive device 3
4 to rotate the power transmission shaft 32, and the worm 36
The worm wheel 39 is rotated through the worm wheel 39. Therefore, the screw shaft 40 moves back and forth in a direction parallel to the rolling material progressing direction, and the small diameter work roll 27 is offset by a predetermined amount via the small diameter work roll chock 28. Further, the small-diameter work roll 27 is given horizontal bending by the horizontal bending cylinder 22 via the split support roll 19 and intermediate support roll 25, and vertical bending is given by the vertical bending device 12.13, and rolling is performed in this state. It will be done.

By using the small-diameter work rolls 27, the rolling load can be reduced for the same rolling reduction rate, and a large rolling reduction can be achieved for the same rolling force.Also, by combining horizontal bending and vertical bending, the edge drop of the rolled material can be reduced and any plate can be formed. Crown control can be performed.

When changing from a 5-high rolling mill to a 4-high rolling mill, the roll assembly 16 is completely pulled out of the rolling line, and the work roll 1 and the work roll chock 5 are inserted into the rolling line.

In addition, in the embodiment of the present invention, the case where the rolls are rearranged into 4 and 5 stages has been described, but it is also applicable to the case where the rolls are rearranged into 4 stages and 6 stages, and between 5 stages and 6 stages. Of course, various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] According to the multi-high rolling mill of the present invention, roll rearrangement can be performed quickly, so that various excellent effects can be achieved, such as shortening line stop time and improving productivity.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of an embodiment of the multi-high rolling mill of the present invention, FIG. 1 is an explanatory diagram of a four-high rolling mill, and FIG.
An explanatory diagram for a high-high rolling mill, Fig. 3 is a detailed view of the roll assembly for a 5-high rolling mill, and Fig. 4 is the IV of Fig. 3.
-IV direction arrow view. In the figure, 1.2 is a work roll, 7.8 is a backup roll, 12.13 is a vertical bending device, 16 is a roll assembly, 18 is an intermediate roll, 19 is a split support roll, 22 is a horizontal bending cylinder, and 25 is an intermediate support 27 is a small diameter work roll, 32 is a power transmission shaft, 36 is a worm, 39 is a worm wheel, 4
0 indicates the screw axis.

Claims (1)

[Claims] 1) A four-high rolling mill equipped with a pair of upper and lower work rolls and a pair of upper and lower backup rolls that back up the work rolls, or a rolling mill in which at least one of the pair of upper and lower work rolls is a small-diameter work roll and a small-diameter workpiece A multi-high rolling mill that can be reassembled into either a 5-high or 6-high rolling mill equipped with a horizontal bending device that provides horizontal bending to small-diameter work rolls by interposing an intermediate roll between a roll and a backup roll. A multi-high rolling mill characterized in that a roll assembly including a work roll and an intermediate roll is formed into a cartridge that can be integrally rearranged.