JPH0679307A - Rolling mill - Google Patents

Abstract

PURPOSE:To execute heavy load rolling without using back-up rolls by arranging so that a pair of upper and lower rolling rolls which is supported with hydraulic supporting devices is crossed by inclining them in the direction of line based on the width direction of rolled stock. CONSTITUTION:Such the hydraulic supporting devices 22 that the outer peripheries of barrel parts of rolling rolls 13 are supportable with pressured fluid 20 are provided. At the same time, a pair of upper and lower rolling rolls 13 which is supported with the hydraulic supporting devices 22 is disposed so as to be mutually crossed by inclining in the direction 27 of line based on the width direction 10 of a rolled stock 9. Such the hydraulic supporting devices that the rolling rolls 13 are supported with the pressured fluid 20 are constituted by forming pressured fluid supplying holes with which pressured fluid chambers are communicated with the outside in the main bodies 11 of the hydraulic supporting devices, connecting the pressured fluid supplying passages 21 which are made so that the pressured fluid 20 in a tank 19 is supplied with a pump 18 to the holes. In this way, by crossing the rolling rolls 13 together with the hydraulic supporting devices, the shape control of the rolled stock is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill.

[0002]

2. Description of the Related Art In a conventional rolling mill, as shown in FIG. 7, upper and lower rolling rolls 1 are supported by backup rolls 2 and shaft boxes 3, 4 for supporting both ends of the rolling rolls 1 and backup rolls 2 are provided. Are housed in a housing 5 so that they can be moved up and down, and the housing 5 is provided with a screw down screw 6 and a screw down cylinder 7 for supporting the axle boxes 3 and 4 from above and below.

In the figure, 8 is a rolled material.

Then, the amount of reduction is set by adjusting the positions of the axle boxes 3 and 4 using the reduction screw 6, and the rolling load applied to the axle boxes 3 and 4 is set using the reduction cylinder 7. When the rolled material 8 is passed between the upper and lower rolling rolls 1, the rolled material 8 is rolled by the rolling roll 1.

At this time, by receiving the reaction force of the rolling load applied to the rolling roll 1 by the backup roll 2,
It is designed so that rolling with a large load can be performed.

[0006]

However, in the above-described conventional rolling mill, the backup roll 2 supports the body of the rolling roll 1 in order to carry out rolling under a large load. However, there is a problem in that the equipment becomes large and heavy due to the provision of the above, and thus the cost of the apparatus is increased.

Further, since the backup roll 2 needs frequent maintenance due to wear or the like, there is a problem that the maintenance is troublesome.

In view of the above situation, it is an object of the present invention to provide a rolling mill capable of rolling a large load without using a backup roll.

[0009]

The present invention provides a pressure liquid support device capable of supporting the outer periphery of the body of a rolling roll by a pressure liquid, and a pair of upper and lower rolling rolls supported by the pressure liquid support device, The rolling mill is characterized in that it is arranged so as to tilt in the line direction with respect to the width direction of the rolled material and intersect with each other.

[0010]

The operation of the present invention is as follows.

By supporting the outer circumference of the body of the roll by using the pressure liquid with the pressure liquid support device, it is possible to carry out rolling with a large load without using the backup roll.

Further, the shape of the rolled material can be controlled by intersecting the pair of upper and lower rolling rolls together with the pressure liquid supporting device.

[0013]

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

1 to 4 show a first embodiment of the present invention.

A body 11 of a pressure liquid support device extending in the width direction 10 of the rolled material 9 is provided, and a body portion 14 of a rolling roll 13 is fitted in a recess 12 formed in the body 11 of the pressure liquid support and extending in the width direction 10. At the same time, the tip of the concave portion 12 contacts the body portion 14 of the rolling roll 13 without any gaps to the peripheral edge portion of the concave portion 12.
A lip seal 16 that forms a hydraulic chamber 15 is attached between the body 14 and the body 14, and the hydraulic chamber 1 is attached to the main body 11 of the hydraulic support device.
5 is formed with a pressure liquid supply hole 17 communicating with the outside,
A pressure liquid support passage 22 capable of supporting the rolling roll 13 by the pressure liquid 20 is connected to the pressure liquid supply hole 17 by connecting a pressure liquid supply passage 21 for supplying the pressure liquid 20 in the tank 19 by the pump 18. Constitute.

Then, a shaft box 23 at both ends of the pair of upper and lower rolling rolls 13 and a supporting portion 24 corresponding to each rolling roll 13 and protruding from both ends of the main body 11 of the liquid pressure support device are adjusted in space therebetween. A cross cylinder 28, which is housed movably in the line direction 27 and is movable up and down in a housing 26 with a cylinder 25 for interposition, is provided between the housing 26 and the shaft box 23 and extendable in the line direction 27. By interposing, the upper and lower rolling rolls 13 and the corresponding pressure liquid support device main body 11 are tilted to the opposite side in the line direction 27 with respect to the width direction 10 of the rolled material 9 so that they can intersect with each other.

Reference numeral 29 is a reduction screw interposed between the upper portion of the housing 26 and the upper support portion 24, and 30 is a reduction screw interposed between the lower portion of the housing 26 and the lower support portion 24. A cylinder, 31 is an overhang portion formed in the center of the housing 26, and 32 is an overhang portion 31 of the housing 26.
And a balance cylinder that is provided between each support 24 and extends in the vertical direction.

Next, the operation will be described.

First, prior to rolling, the reduction screw 2
9 is used to adjust the positions of the axle box 23 and the support portion 24 to set the reduction amount, and the reduction cylinder 30 is used to set the rolling load applied to the axle box 23 and the support portion 24. To drive the pressure liquid 2 in the tank 19
0 is supplied to the hydraulic chamber 15 of the main body 11 of the pressure supporting device via the pressure supplying passage 21 and the pressure supplying hole 17.

Then, when the rolled material 9 is passed between the upper and lower rolling rolls 13, the rolled material 9 is rolled by the rolling roll 13.

At this time, in the hydraulic chamber 15, the lip seal 1
Since the leakage of the pressure fluid 20 from the fluid pressure chamber 15 is minimized by 6, the pressure fluid 20 in the fluid pressure chamber 15 is maintained at a desired pressure, and the pressure of the pressure fluid 20 causes the cylinder of the rolling roll 13 to move. The part 14 is supported.

As a result, the reaction force of the rolling load acting on the rolling roll 13 can be received by the pressure liquid 20 and rolling with a large load can be performed.

In this way, by providing the pressure liquid support device 22,
Since the rolling roll 13 is supported by the pressure liquid 20, the size and weight can be reduced as compared with the case where the backup roll is used, and the cost of the device can be reduced.

Further, since the pressure liquid support device 22 uses the pressure liquid 20, it does not wear like a backup roll, so that the maintenance labor can be greatly reduced.

Here, in order to control the shape of the rolled material 9 by the rolling mill using the above-mentioned pressure liquid 20, the cross cylinder 2 is used.
4, the upper and lower rolling rolls 13 are tilted to the opposite side in the line direction 27 with respect to the width direction 10 of the rolled material 9 together with the corresponding pressure liquid support device main body 11 and intersect each other as shown in FIG. Let

When the rolling rolls 13 are crossed in this way, the roll gap between the rolling rolls 13 is not uniform in the width direction 10 of the rolled material 9, so that the rolling acting on the rolled material 9 according to the roll gap. The load is also changed in the width direction 10. By utilizing this, the rolling load can be distributed in the width direction 10 to control the shape of the rolled material 9.

FIG. 5 shows a second embodiment of the present invention, which has the same structure as that of the above embodiment except that the elastic seal roll 33 is used instead of the lip seal 16, and the same operation and The effect can be obtained.

In this case, a slight gap 34 is formed between the main body 11 of the liquid pressure support device and the portion of the elastic seal roll 33 on the side opposite to the rolling roll 13 so that the gap 34 communicates with the rolling supply port 17. The elastic seal roll 33 is brought into pressure contact with the rolling roll 13 and rotated by the pressure liquid 20 flowing into the gap 34 to ensure the sealing property.

FIG. 6 shows a third embodiment of the present invention, except that the elastic seal rolls 33 are provided in multiple stages (two stages in this case) so that the load pressure can be further increased. It has the same configuration as the above and can obtain the same operation and effect.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0031]

As described above, according to the rolling mill of the present invention, it is possible to achieve an excellent effect that rolling with a large load can be performed without using a backup roll.

[Brief description of drawings]

FIG. 1 is a schematic side view of a first embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a schematic side cross-sectional view of a pressure liquid support device portion.

FIG. 4 is a schematic perspective view of the first embodiment of the present invention.

FIG. 5 is a schematic side sectional view of a portion of the pressurized liquid support device according to the second embodiment of the present invention.

FIG. 6 is a schematic side sectional view of a portion of a liquid pressure support device according to a third embodiment of the present invention.

FIG. 7 is a schematic side view of a conventional example.

[Explanation of symbols]

 9 Rolled material 10 Width direction 13 Rolling roll 14 Body 20 Pressure liquid 22 Pressure liquid support device 27 Line direction

Claims (1)

[Claims] 1. A pressure liquid support device capable of supporting the outer periphery of the body of a rolling roll with a pressure liquid is provided, and a pair of upper and lower rolling rolls supported by the pressure liquid support device are provided with reference to the width direction of the rolled material. A rolling mill, wherein the rolling mills are arranged so as to tilt in the line direction and intersect each other.