JPH0422642B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rolling mill in which rolls can be easily rearranged.

[Prior art and its problems]

2. Description of the Related Art Conventionally, a rolling mill is known in which a work roll can be bent by a bending cylinder as necessary in order to optimally control the thickness shape of a rolled material in the width direction. Figures 1 and 2
Each figure shows an example of this type of rolling mill.
Figure 1 shows the bending cylinders 1a, 1b being connected to the upper and lower work rolls 2a, 2b by chocks 3a, 3b.
Also, as shown in FIG. 2, blocks 4a and 4b fixed to the housing are arranged along the axial direction of the upper and lower work rolls 2a and 2b, and bending cylinders 1a and 1 are attached to the blocks 4a and 4b, respectively. 1b
It incorporates.

By the way, in a rolling mill, upper and lower work rolls 2a, 2b and upper and lower back rolls 5a,
It is necessary to frequently rearrange the rolling mills 5b, but this is not easy in the former rolling mill, while the latter is relatively easy to rearrange, but there are problems with the equipment. That is, when rearranging the lower back up roll 5b in the former rolling mill, first, the upper and lower work rolls 2a, 2b are removed and pulled out, and then the lower back up roll 5b is moved upward as shown in FIG. Lift it up and pull it out to the work side. However, bending cylinders 1 are installed in the chock 3a, 3b of each of the upper and lower work rolls 2a, 2b.
Since the rollers a and 1b are incorporated, the hydraulic piping and the like must be removed each time the rolls are reassembled, which lengthens the reassembly time and raises the risk of oil leakage. On the other hand, the latter type of rolling mill does not require the removal of hydraulic piping and does not have the same problem as the former type, but since the blocks 4a and 4b are fixed to the housing, it is difficult to lift the lower back up roll 5b upward. As shown in FIG. 4, the lower back-up roll 5b was pulled out to the working side at the same height, so the foundation on the working side had to be dug deeper than in the former case. Also,
The turntable 6 for reassembling the work rolls 2a, 2b installed on the work side is made movable, and must be moved aside when reassembling the lower back up roll 5b.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rolling mill in which the rolls can be easily rearranged, and there is no need to lower the foundation on the work side or make the turntable movable. With the goal.

[Structure and operation of the invention]

In order to achieve the above object, the present invention has a beam in which a bending cylinder is incorporated so as to be movable in the vertical direction along the radial direction of the work roll to a position where the lower back up roll can be rearranged. When rearranging the upper rolls, the beam is moved upward to a position where it does not get in the way, and the lower back rolls can be lifted upward and pulled out for rearrangement.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 5 to 7. In the figures, 10 and 11 are a pair of upper and lower work rolls, and 12 and 13 are also a pair of upper and lower back up rolls. Chocks 14, 15 and 16, 17 are provided.

A pair of beams 1 are provided between both side edges of the chock 14 of the upper work roll 10 and the housing 18.
9 and 20 are disposed along the axial direction of the upper work roll 10, and a pair of beams 21 and 22 are similarly arranged between the housing 18 and both side edges of the chock 15 of the lower work roll 11. 1
1 along the axial direction. These beams 19, 20 and 21, 22 have built-in bending cylinders 23, 24 that bend the upper and lower work rolls 10, 11 to control the thickness shape of the rolled material in the width direction.

Further, the housing 18 has the beam 1
An elevating mechanism 25 is attached to move the parts 9, . . . up and down. That is, at predetermined positions on the drive side and the work side on the side surface of the housing 18, rail guides 26 and 27, which have rail surfaces 26a and 27a and engaging portions 26b and 27b on one side and extend in the vertical direction, drive the one side. A back-up roll yoke and a clamping member 28 for the beam are provided toward the side and the working side. In addition, the above lower work roll 1
Below the chock 15 of 1, the beams 21, 22
Rails 29 and 30 are disposed below the work rolls 10 and 11 along the axial direction, respectively, and at both ends of the rails 29 and 30 are movable members 31 and 31 equipped with a plurality of rollers 31a and 32a, respectively. 32 and the engaging members 33, 34 are connected to the rollers 31a, 32a.
The rail surface 26a of the rail guides 26, 27,
27a, and the distal ends of the engaging members 33, 34 are brought into contact with the rule guides 26, 27a.
The lower ends of the movable members 31 and 32 are provided with cylinder parts 35a and 3.
6a is a telescopic cylinder device 35 fixed to the lower ends of the rail guides 26, 27;
The tips of 36 piston rods 35b, 36b are connected. And the cylinder device 35,
36, rails 29, 30, movable members 31, 32, etc. constitute the above-mentioned elevating mechanism 25, and by operating the cylinder devices 35, 36 to move the movable members 31, 32 and the rails 29, 30 up and down. The beams 19, . . . can be raised and lowered.

Note that the rails 29 and 30 are the work roll 1.
This is commonly used for rearranging numbers 0 and 11.
That is, the chock 1 of the lower work roll 11 is
A roller 37 that can be rolled on the rails 29, 30 is attached to the lower part of the roller 5, so that the work rolls 10, 11 can be moved along with the jocks 14, 15 on the rails 29, 30. ing.

When rearranging the lower back-up roll 13 in the rolling mill configured as described above, after removing the work rolls 10, 11, etc., the cylinder device 3
5, 36 to move the beams 19, . . . upward. That is, the work rolls 10, 11, etc. are removed from the state shown in FIG. 8, and the cylinder devices 35, 36 are removed.
When actuated, the rails 29, 30 are moved upward with their upper edges supporting the beams 21, 22 from below, thereby causing the beams 19, .
is stored in a predetermined position above as shown in FIG. After this, the lower back-up roll 13 is once moved slightly to the working side using the C hook 38, and then lifted upward and pulled out to the working side when it reaches a predetermined height.

In this way, the lower back up roll 13 is not pulled out to the work side as it is, but is lifted upwards and then pulled out to the work side, so there is no need to dig deeply into the foundation on the work side, and the turntable 39 is also removed. A fixed type is fine. Furthermore, since the bending cylinders 23, 24 are incorporated into the beams 19, . . ., there is no need to take the trouble to remove the hydraulic piping etc. when changing the rolls.

By the way, in the above, the rails 29, 30
The beams 19, . . . are moved up and down by cylinder devices 35, 36 to raise and lower the beams, but the cylinder devices 35, 36 are connected to the lower beams 21, 22 to directly raise and lower the beams 19, . You can also do that.

〔Effect of the invention〕

As is clear from the above description, the present invention has the following effects.

(a) Since the bending cylinder is built into the beam, there is no need to take the trouble to remove the hydraulic piping etc. when changing the work rolls, thus improving work efficiency in changing the rolls.

(b) The beam incorporating the bending cylinder is arranged so that it can be moved vertically to a position where the lower back-up roll can be rearranged.
When rearranging the lower back up roll, the beam can be moved upward to a position where it does not get in the way by the lifting mechanism, so the lower back up roll can be lifted upward and pulled out to the work side. Therefore, there is no need to dig deep into the foundation on the work side or to make the turntable movable, and equipment costs can be reduced.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic side views showing conventional examples of a rolling mill, and FIGS. 3 and 4 are schematic front views showing working conditions of roll rearranging in each of the conventional examples. 5 to 9 show an embodiment of the present invention, in which FIG. 5 is a side view, FIG. 6 is a view taken along the - arrow in FIG. 5, and FIG. FIG. 8 is a schematic front view, and FIG. 9 is a schematic front view showing the working state of recombining the rolls. 10... Upper work roll, 11... Lower work roll, 12... Upper back up roll, 13...
Lower backup roll, 18...Housing, 1
9...Beam, 20...Beam, 21...Beam, 22...Beam, 23...Bending cylinder, 24...Bending cylinder, 25...
Lifting mechanism, 35... cylinder device, 36... cylinder device.

Claims (1)

[Claims] 1. A rolling mill characterized in that a beam incorporating a bending cylinder is disposed so as to be movable in the vertical direction along the radial direction of the work roll to a position where the lower back up roll can be rearranged.