JPH066202B2 - In-machine positioning and holding device for different length work rolls of multi-high rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a multi-stage rolling mill used for cold rolling of steel strips, when incorporating work rolls having different roll lengths (different lengths). The present invention relates to a device for incorporating a long work roll in a predetermined position in a machine with good workability, efficiently and safely, and for holding the work roll once assembled in a predetermined position in the machine.

[Conventional technology]

In the conventional multi-high rolling mill, the work rolls are all rearranged manually. One of the reasons is
This is because the multi-high rolling mill itself was small, and the work rolls were also relatively small in size and light in weight, and could be transported and handled manually. The second reason is that the shape of the work roll does not have a chock, that is, the body part in contact with the steel strip that is the material to be rolled and the end part have the same diameter, so that other rolling mills such as This is because it was not possible to use a roll changing jig such as a porter bar or a hook unlike the heavy rolling mill or the quadruple rolling mill.

However, as the multi-stage rolling mill gradually increases in size as the width of the steel strip to be rolled increases, the size and weight of the work roll also naturally increase, and handling by input becomes extremely difficult as before, Further, even if it can be handled, there are problems that workability and efficiency are significantly impaired, and there is danger.

In order to solve such a problem, for example, Japanese Patent Publication No. 48-
The use of a work roll exchange carriage as shown in 24630 and Jikho 61-4401 has come to be used. In other words, the work rolls in the multi-high rolling mill have been changed using a highly efficient work roll changing device that can be easily changed by mechanical force.

However, the work rolls that can be reassembled using such an exchange trolley are usually ones of a roll length corresponding to the maximum width steel strip that can be rolled by the multi-stage rolling mill. With this one type of longest work roll, everything was cold-rolled into narrow steel strips.

[Problems to be solved by the invention]

However, recently, as described above, instead of incorporating one type of longest work roll into a multi-stage rolling mill and cold rolling to a narrow steel strip, a narrow steel strip has a roll length commensurate with that. Cold work was started by incorporating a short work roll. This is because the unit cost of the work rolls is cut down and the maintenance cost such as roll polishing is reduced. However, in this way, one type of multi-stage rolling mill has several different roll lengths, that is, different lengths. Have work rolls,
Since these work rolls are installed in a predetermined position in the machine and cold-rolled while being held, there are problems as described below.

(1) Even when using the exchanging carriage type reassembling device as described above, even when trying to reassemble work rolls of different lengths, it is easy to handle, work efficiently and efficiently at a predetermined position in a narrow machine.
Moreover, the rolls and steel strips cannot be positioned without damaging them, and at most they can be temporarily placed in the machine, and the rolls once assembled in a predetermined position cannot be securely held in that position. It was

(2) In order to set the work rolls of different lengths temporarily placed in the machine by the rearrangement device to the predetermined positions, it was necessary to perform unsafe manual adjustment work.

The present invention has been made for the purpose of solving these problems.

[Means for solving problems]

The present invention is a device for achieving the above object, and as a first invention, a device for positioning and holding a work roll of different length incorporated in a multi-stage rolling mill at a predetermined position in the machine, which comprises: The thrust pressing member having a distribution length that should be compensated for according to the length is fixed to the inside of the access door and the driving side door provided on the operation side door of the multi-stage rolling mill. It is a feature.

As a second invention which is a further improvement of the first specified invention, there is provided a device for positioning and holding a work roll of different length incorporated in a multi-high rolling mill at a predetermined position in the machine, the length of the work roll being incorporated. The thrust pressing member having a constant distribution length to be compensated for on the driving side door, while the thrust pressing member connected to the cylinder capable of varying the distribution length of the compensation length on the operating side. It is characterized by being fixed to the access doors provided on the doors, respectively, toward the inside of the aircraft.

〔Example〕

1 to 5 show an embodiment of the present invention,
Based on these drawings, the configuration and operation of the in-machine positioning and holding device for the different length work rolls of the multi-stage rolling mill according to the present invention will be described in more detail.

(A) and (b) of FIG. 1 are front views of essential parts showing a state in which a work roll is incorporated in a predetermined position in a multi-high rolling mill,
Figure (a) shows the case where the longest work roll L is incorporated, and (b) shows
It is a figure which shows the case where the work roll L'shorter than the longest work roll L shown in (a) figure is incorporated.

2 (a) to 2 (d), the thrust pressing member is fixed to the access door provided on the operation side door in a state where the work rolls L and L'are incorporated in predetermined positions as shown in FIG. It is a principal part expanded explanatory view which shows the state which was done. Out of Figure 2
Figures (a) and (b) show the case where the longest work roll L is incorporated, in which (a) is a plan view and (b) is a front view. 2 (c) and FIG. 2 (d) show the case where a short work roll L'is incorporated, FIG. 2 (c) is a plan view, and FIG. 2 (d) is a front view.

3 (a) to 3 (d), as shown in FIG. 1, the work rolls L and L'are mounted at predetermined positions in the machine, and the thrust pressing member is fixed to the drive side door. It is a principal part expansion explanatory drawing which shows a state. Figures 3 (a) and 3 (b) show the case where the longest work roll L is incorporated,
(a) is a plan view and (b) is a front view. Also in FIG.
Figures (c) and (d) show the case where a short work roll L'is incorporated, (c) shows a plan view, and (d) shows a front view.

FIGS. 4 (a) and 4 (b) show that when the longest work roll L is installed at a predetermined position in the multi-stage rolling mill, the thrust pressing member having the cylinder connected to the access door provided on the operation side door is fixed. 6A and 6B are enlarged explanatory views of a main part showing a state where FIG. 6A is a plan view and FIG. Further, FIG. 4 (c) is a sectional view taken along line AA of FIG. 4 (a).

FIGS. 5 (a) and 5 (b) show a thrust pressing member having a fixed length R fixed to the drive side door of the multi-stage rolling mill, and a cylinder to which the access door provided in the operation side door is fixed. FIG. 7 is an enlarged front view of a main part showing a state in which a work roll is incorporated at a predetermined position in the machine by the action of the attached thrust pressing member.

In FIG. 5 (a), when the longest work roll L is incorporated, on the other hand, in FIG. 5 (b), when the work roll L'shorter than the longest work roll L is incorporated, the difference between the roll lengths is calculated as a cylinder. The state where compensation is performed by the stroke S is shown.

Generally, a multi-high rolling mill cold-rolls a steel strip as a material to be rolled, as shown in FIG. 6 and a schematic explanatory view of an embodiment thereof.

In FIG. 6, this shows a 20-high Sendia Mill of the multi-high rolling mill, where 1 is the multi-high rolling mill body,
2 is a steel strip, 3u and 3d are upper and lower work rolls, 4 is a first intermediate roll, 5 is a second intermediate roll, and 6 is a backup roll. Further, 7 and 8 are opening / closing doors, which are on the operating side and the driving side. An access door 9 is provided on the operation side door 7. Then, the steel strip 2 is given an appropriate tension, and is cold-rolled by the upper and lower work rolls 3u and 3d while levering right and left on the paper.

In the multi-high rolling mill that cold-rolls the steel strip as described above,
The part relating to the above-mentioned first invention will be described below with reference to FIGS.

In the figure, 10 is a thrust pressing member fixed to the inside of the machine by bolts 13 to the access door 9 provided on the operation side door 7, while 11 is a thrust fixed to the inside of the machine by bolts 13 to the drive side door 8. It is a holding member. Reference numeral 12 denotes a bearing which is provided at the tip end portions of the thrust pressing members 10 and 11 on the operating side and the driving side, and rotates by contacting the end faces of the upper and lower work rolls 3u and 3d. Reference numeral 14 denotes a lock mechanism of the access door 9 provided on the operation side door 7 and opened / closed.

When the longest work rolls 3u and 3d having a roll length L are incorporated in the multi-high rolling mill body 1 as described above,
Figure (a), Figure 2 (a), (b) and Figure 3 (a),
(b) As shown in the figure, thrust pressing members 10 and 11 having a length of X on the operating side and a length of Y on the driving side are fixed to each door to position the longest work roll L at a predetermined position in the machine. Along with that, it is held so that it does not move in the horizontal thrust direction.

In this case, the compensation length (X + Y) necessary for positioning the longest work roll L at a predetermined position in the machine and its distribution lengths X and Y may be calculated and calculated from the model and structural dimensions of the multi-high rolling mill. .

On the other hand, when the work roll L'shorter than the longest work roll L is incorporated, the work roll L'of FIGS.
As shown in FIGS. 3 (c) and 3 (d) and FIGS. 3 (c) and 3 (d), thrust pressing members 10 and 11 having lengths X'on the operating side and Y'on the driving side are provided. The short work roll L'is fixed to each door and positioned and held at a predetermined position in the machine.

In this case, since the work roll L'is shorter than the longest work roll L, the length (X '+ Y') to be compensated and its distribution lengths X ', Y' are calculated from (X + Y) and X, Y. The thrust pressing members 10 and 11 are calculated and manufactured in advance so that the dimension becomes long.

Next, the portion related to the above-mentioned second invention will be described below with reference to FIGS. 4 and 5.

In the second invention, as shown in these drawings, only the operating side is structurally different from the first invention. As shown in FIGS. 4 (a) and 4 (b), the cylinder 15 is supported by the access door 9 on the operating side.
The thrust pressing member 10 is fixed to the shaft 16.

4 (a), (b) and FIG. 5 (a) show a state in which the longest work roll L is positioned and held at a predetermined position, but FIG. In the case of b), the work roll L'shorter than the longest work roll L is positioned and held at a predetermined position.

In any case, a thrust pressing member 11 having a constant distribution length R of a length to be compensated is fixed to the drive side door 8 so that the work rolls L and L'are positioned and held at predetermined positions. To be done. However, the access door 9 on the operating side
The thrust pressing member 10 is fixed to the cylinder 10 by which the distribution length Z'of the length (R + Z ') to be compensated for due to the shorter work roll can be varied by the cylinder stroke S.

That is, Z, R, and S are calculated and determined so that these work rolls 3u and 3d are positioned and held at predetermined positions in the machine according to the lengths L and L'of the work rolls to be incorporated. The thrust pressing members 10 and 11 and the cylinder 15 corresponding to the dimensional length are manufactured in advance and fixed to each door.

It is preferable to use a hydraulic cylinder as the cylinder 15, and a hydraulic device and a push button for driving the cylinder 15 may be installed outside the multi-stage rolling mill main body 1, although they are not shown.

[Action]

The device according to the invention is constructed as described above,
A method of positioning and holding the different length work roll at a predetermined position in the machine using this apparatus will be described below.

In the first aspect of the invention, first, the operation side door 7 is opened, and the work rolls 3u, 3d of the upper and lower stages are temporarily placed in the multi-stage rolling mill from the operation side by using the above-described exchanging carriage type rearrangement device. . At this stage, these work rolls are not yet positioned at predetermined positions, but the drive side door 8,
When the operation side door 7 and the access door 9 provided on the door 7 are completely closed and the lock mechanism 14 is locked, these work rolls are automatically positioned at predetermined positions.

When the steel strip is passed through the machine to prepare for rolling or is actually cold-rolled, the bearings 12 attached to the tips of the thrust pressing members 10 and 11 fixed toward the machine are installed in the work rolls 3u. , 3d are brought into contact with the end faces to rotate, so that each work roll is held without moving in the horizontal thrust direction.

However, in the device according to the first aspect of the present invention, the thrust pressing members 10 and 11 having different lengths according to the length of the work roll to be incorporated must be held in the multi-stage rolling mill, and moreover, it is cold. There is an inconvenience and inefficiency that the thrust pressing members having different lengths must be replaced each time the work roll length is changed as the width of the steel strip to be rolled is changed.

The second invention solves this problem and improves it. However, as shown in FIG. 5 (a), when the longest work roll L is incorporated, it is positioned and held in the first invention. The method may be exactly the same. However, when a work roll L'shorter than the longest work roll L is incorporated as shown in FIG. 7B, all the doors 7, 8 and 9 are closed and the lock mechanism 14 is locked, and then the multi-stage rolling mill main body When a push button provided outside 1 is operated to operate the cylinder 15 in the pusher, the upper and lower work rolls L ′ move horizontally and are automatically positioned at a predetermined position and held at that position.

[Effects] As described above, the device according to the present invention has a simple configuration and action, but unlike the conventional case where unsafe manual adjustment work is performed, effective.

a) It is possible to accurately position and hold the different-length work rolls temporarily placed in the multi-stage rolling mill at the predetermined position inside the mill by simply closing each door of the rolling mill or by pressing the push button after closing. Became.

b) Therefore, the workability of changing the work rolls has been greatly improved, and what was conventionally performed by two people can now be done by one person.

c) And, conventionally, this reassembling work took a long time, but in the first invention, it can be shortened to about 20 minutes, and in the second invention, it can be shortened to 10 minutes or less. The working efficiency of the machine has been greatly improved.

d) Especially when the device according to the second invention is used, since there is no need to replace the thrust pressing member, the safety is sufficiently improved.

e) The cost of manufacturing the device according to the invention is low.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a front view of a main part showing a state in which a work roll of different length is incorporated in a predetermined position in a multi-high rolling mill, and FIG. FIG. 4 is an enlarged explanatory view of an essential part showing a state in which a thrust pressing member is fixed to an access door provided on a side door, and FIG. 3 is an enlarged explanatory view of an essential part showing a state in which a thrust pressing member is fixed to a drive side door.
The figure is an enlarged explanatory view of the essential parts showing a state in which a thrust pressing member having a cylinder connected to the operating side access door is fixed. And, FIG. 5 shows a predetermined position in the multi-stage rolling mill by the action of the thrust pressing member fixed to the drive side door and having a constant length R and the thrust pressing member with the cylinder fixed to the operation side access door. It is a principal part enlarged front view which shows the state which incorporated the work roll in. FIG. 6 is a schematic explanatory view showing an embodiment of a multi-stage rolling mill for cold rolling a steel strip. 1: multi-stage rolling mill main body 2: steel strip 3u: upper work roll 3d: lower work roll 4: first intermediate roll 5: second intermediate roll 6: backup roll 7: operation side door 8: driving side door 9: operating side Access door provided on the door 10: Thrust pressing member (operating side) 11: Thrust pressing member (driving side) 12: Bearing 13: Bolt 14: Access door lock mechanism 15: Cylinder 16: Cylinder head

Claims (7)

[Claims] 1. A device for positioning and holding different-length work rolls incorporated in a multi-high rolling mill at a predetermined position in the mill, the distribution length having a length to be compensated according to the length of the work rolls incorporated. A thrust pressing member having a height is fixed to an access door and a drive side door provided on an operation side door of the multi-stage rolling mill toward the inside of the multi-roll rolling mill. Positioning and holding device. 2. An in-machine positioning and holding device for different length work rolls of a multi-high rolling mill according to claim 1, wherein the multi-high rolling mill is a Sendzimir mill. 3. The bearing according to claim 1 or 2, wherein the thrust pressing member is provided with a bearing at the tip end portion thereof so as to rotate in contact with the end faces of both upper and lower work rolls incorporated therein. In-machine positioning and holding device for work rolls of different lengths of the described multi-stage rolling mill. 4. A device for positioning and holding different-length work rolls incorporated in a multi-high rolling mill at a predetermined position in the mill, and a constant distribution of lengths to be compensated according to the length of the work rolls incorporated. A thrust pressing member having a length is provided on the drive side door, and a thrust pressing member connected to a cylinder capable of varying the distribution length of the length to be compensated is provided on the access door provided on the operation side door. An in-machine positioning and holding device for work rolls of different lengths in a multi-stage rolling mill, characterized in that they are fixed toward each other. 5. An in-machine positioning and holding device for different length work rolls of a multi-high rolling mill according to claim 4, wherein the multi-high rolling mill is a Sendzimir mill. 6. The bearing according to claim 4 or 5, characterized in that a bearing is provided at the tip end portion of the thrust pressing member to rotate by contacting the end faces of both upper and lower work rolls incorporated therein. In-machine positioning and holding device for work rolls of different lengths of the described multi-stage rolling mill. 7. The in-machine positioning and holding device for different length work rolls of a multi-stage rolling mill according to claim 4, wherein the cylinder is a hydraulic cylinder.