JPH01306006A - Device for changing backup roll - Google Patents

Abstract

PURPOSE:To improve the changing efficiency and to reduce the equipment and maintenance costs by installing a roll changing carriage and a stool for upper backup roll changing and separately or concurrently changing backup rolls. CONSTITUTION:A self-propellable roll changing carriage 5 on a rail 11 is installed in a side of a mill housing 2 and a stool 3 travelling on a mill inside rail 1 fixed to the housing 2 for upper backup roll changing is also installed. The carriage 5 is located in a waiting position 12; the stool 3 is put on the rail 1 and the carriage 5 and is set by a hook 6a. The stool 3 is pushed into a rolling mill and a backup roll 7 is downed and pulled out the mill. The rolls 3, 4 are separately or concurrently changed, so that the roll changing efficiency is improved. The equipment and maintenance costs are reduced because a driving device for the carriage 5 is commonly used.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a backup roll changing device and a changing method for a rolling mill, and particularly to a backup roll suitable for efficiently replacing old and new upper and lower backup rolls. The present invention relates to a recombination device and a recombination method.

[Conventional technology]

A conventional backup roll changing device for a rolling mill, as described in Japanese Patent Publication No. 58-3201, inserts a stool between the lower backup roll and the upper backup roll and mounts it on the lower backup roll when replacing the backup roll. The stool was moved in and out by pushing and pulling the lower backup roll, and the upper and lower backup rolls were replaced.

[Problem to be solved by the invention]

However, the above conventional device uses a stool that is mounted on the lower backup roll and is moved in and out by pushing and pulling the lower backup roll, so even if you want to change only the upper backup roll, you can change the lower back roll once. There was a problem in that the upper backup roll could not be replaced unless the lower backup roll, which does not necessarily require roll replacement, was operated because it required an operation to pull it out from inside the rolling mill.

An object of the present invention is to provide an efficient backup roll reshuffling device and reshuffling method that does not require the operation of the lower backup roll when reshuffling the upper backup roll alone.

[Means to solve the problem]

According to the first aspect of the present invention, the above object is to provide a roll reshuffling cart that replaces old and new work rolls or work rolls and intermediate rolls, and an upper back roll reshuffler that replaces old and new upper backup rolls. This is achieved by a backup roll changing device, characterized in that the stool has means at one end for supporting the stool in an engaged state that allows the stool to be pushed and pulled by the roll changing cart. Preferably, the backup roll changing device further includes an inner mill rail for upper pack roll changing that is attached to the mill housing below the upper backup roll and extends in the roll axis direction from inside the mill housing window frame; The stool has means at its other end for movably supporting the stool on the intra-mill rails.

However, the stool may have an overhang type in which only the one end is supported by the roll changing truck by the support means.

Preferably, the backup roll changing device further includes a work roll or an in-mill rail for changing work rolls and intermediate rolls attached to the mill housing, and the stool is attached to the other end of the mill rail. It has means for movably supporting it on the rails within the mill.

According to the second aspect of the present invention, the above object is achieved by providing a roll changing cart for replacing old and new work rolls or work rolls and intermediate rolls; an in-mill rail for upper backup roll reassembly extending in the roll axis direction from inside the housing window frame; and an upper back-up roll assembly mounted on the roll recombination truck and supporting in a stationary state capable of pushing and pulling one end of the upper backup roll assembly. The method is characterized by comprising a tip support frame for rearranging backup rolls, and means provided on the upper backup roll assembly and having means for movably supporting the other end of the upper backup roll assembly on the rail in the mill. This is achieved by a backup roll reshuffling device.

According to the third aspect of the present invention, the above-mentioned object includes a roll changing cart for replacing old and new work rolls or work rolls and intermediate rolls, and a mill housing window that is attached to the mill housing below the upper backup roll. an inner mill rail for upper backup roll rearrangement extending in the roll axis direction from inside the frame; an outer mill rail for upper backup roll rearrangement that is attached to the roll rearrangement cart and aligned with the inner mill rail; and an upper backup roll. This is achieved by a backup roll changing device characterized in that it has means provided at both ends of the assembly for movably supporting the E-back roll assembly on the inner mill rail or the outer mill rail.

According to the present invention, the above-mentioned object is further achieved by using a roll changing cart for replacing old and new work rolls or work rolls and intermediate rolls, and a drive device for the roll changing cart, so that the upper and lower backup rolls can be rolled independently. This is achieved by a backup roll reshuffling method characterized by performing reshuffling or simultaneous roll reshuffling.

[Effect]

In the first aspect of the invention, the upper buffer .
- The stool for recombining the rolls is inserted between the lower back-up roll and the upper back-up roll in the rolling mill by the running of the roll reshuffling cart, and the upper buffer roll is mounted on top of it, and the stool is rolled again. As the recombination cart runs, the upper roll is pulled out of the rolling mill by the pull-out element. Therefore, it is possible to perform a single L7-roll reshuffling of only the -1 Nibazukuazubro without requiring the operation of the Downbazukuazubu roll.

If an internal mill rail for rearranging the upper backup roll is further installed, and a means is provided at the other end of the stool for movably supporting the stool on the internal mill rail, the stool is supported at both ends. , it is possible to stably support the stool.

Only one end of the stool! When supported on a 7-ru recombination platform, even if the above-mentioned mill rail cannot be installed inside the rolling mill due to dimensional space or other reasons, single roll recombination of the two series of upper backup rolls becomes possible.

If a means for movably supporting the other end of the stool is provided on the work roll or the rail in the mill for changing work rolls and intermediate rolls, rolling (inside the above-mentioned Even if it is not possible to install a rail inside the mill for rearranging the upper backup roll, the stool can be stably supported.

In the second aspect of the present invention, the tip support frame for changing the upper backup roll is inserted between the lower backup roll and the upper backup roll in the rolling mill as the roll changing cart runs, and is connected to the rail in the mill. The upper backup roll is mounted on the tip support frame.Then, by pulling out the tip support frame by running the roll changing cart, the upper backup roll runs on the rail inside the mill via the support means, The upper backup roll is pulled out of the rolling mill, so it is possible to change the upper backup roll alone without requiring the operation of the lower backup roll.゛In the third aspect of the present invention,
The rail outside the mill for rearranging the upper backup roll is connected to the rail inside the mill by the running of the roll rearrangement cart.Next, the upper backup roll is mounted on the rail inside the mill and pulled out, and the upper backup roll becomes a support means. It travels on the rails outside the mill through the rails and is pulled out of the rolling mill. Therefore, independent roll rearrangement of only the upper backup roll can be performed without requiring operation of the lower backup roll.

In the present invention, the lower backup rolls can be rearranged using a conventional roll rearrangement cart. Therefore, it is possible to perform individual roll reshuffling or simultaneous roll reshuffling of the upper and lower backup rolls using the roll reshuffling cart and the drive device for the roll reshuffling cart, thereby providing a simple and compact roll reshuffling device. I can do it.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 1 is a diagram showing the entire backup roll reshuffling device of this embodiment, in which an upper backup roll reshuffling mill rail 1 is fixed to a mill housing 2, and is attached to the tip overhanging on the roll reshuffling side. An unattached running wheel 4 rides on the tip of one side of the stool 3 for changing the upper backup roll.

The other end 3a of the stool 3 is connected to the work roll 1
5 or the work roll 15 and the intermediate roll 14 are mounted on the tip of the roll changing traveling trolley 5, and are connected by a hook 6a.

The stool 3 for recombining the upper backup roll has a mounting part 3b and a positioning part 3C for the upper backup roll 7, in addition to the above-mentioned wheels 4, the tip part 3a for connection with the roll recombination cart 5, and the hook 6a. The corresponding mounting part and positioning part on the backup roll 7 side mesh with each other, so that operation and positioning can be performed reliably when changing the upper backup roll.

The lower backup roll 8 is equipped with running wheels 8a and hooks 8b for roll rearrangement, and a rail 9 in the mill for rearrangement of the lower backup rolls provided on the roll rearrangement side from inside the rolling mill and a rearrangement continuous with the lower backup roll rearrangement rail 9. It is designed to be able to run on rails 10.

A connecting hook 6b of the lower backup roll hook 8b is attached to the lower end of the roll changing cart 5, facing the connecting hook 6b of the leading end 3a of the upper backup roll changing stool. On the other hand, roll recombination trolley 5
can freely run on the bogie running rail 11 by a drive device (not shown).

Next, the operation of the above configuration of this embodiment will be explained.

The individual rearrangement of the upper backup roll 7 will be explained with reference to FIG. 2.

(1) In the case of the old backup roll drawer, the roll changing cart 5 is in a standby position f at a distance of 12M from the mill housing 2.
r, (hereinafter referred to as the standby position 12), the upper backup roll changing stool 3 is mounted on the mill rail 1 and the roll changing trolley 5, and the roll changing trolley side hook 6a is attached. Roll rearrangement trolley 5 after setting
is advanced toward the rolling mill, and the stool 3 is pushed into the rolling mill to a specified position and stopped. In this state, the stool 3 is lowered by lowering the upper backup roll 7 that had been pushed upward by a balance device (not shown) in the rolling mill.
The upper backup roll 7 and the stool 3 are positioned at the same time as the user gets on the top. The roll changing cart 5 is moved backward from this state and stopped at the standby position 12, thereby completing the withdrawal of the old backup roll 7 from the rolling mill.

FIG. 2 shows this state.

Next, the upper backup roll 7 and the stool 3 are carried out by a crane to complete the extraction work of the upper backup roll 7. 6 (2) Pushing of the new backup roll The new upper backup roll 7 is pushed into the rolling mill using the old backup roll. The procedure is the reverse of the roll pull-out operation.

Next, regarding the individual rearrangement of lower backup roll 8, the third
This will be explained using figures.

(1) In the case of pulling out the old backup roll The roll reassignment cart 5 moves forward toward the rolling mill from the standby position 12, and is used to reassemble the lower backup roll 8 that is already waiting at the roll reassignment position in the rolling mill. The hook 8b and the roll change side hook 6a are connected and stopped. Next, the roll changing cart 5 is moved backward and stopped at the standby position 12, and the withdrawal of the heavy lower backup roll 8 from the rolling mill is completed.

Figure 3 shows this state. The lower hook 6b of the 0-order and 1-coil rearrangement trolley is pulled up, the connection with the lower backup roll hook 8b is cut, and the lower pack adzbro roll 8 is carried out with a crane. By lower buffer tuberol 8
Complete the withdrawal process.

(2) Pushing of the new backup roll Pushing of the new lower backup roll 8 into the rolling mill is a reverse procedure to the procedure for pulling out the old backup roll.

The simultaneous rearrangement of the upper and lower backup rolls 7 and 8 will be explained with reference to FIG.

The procedure for simultaneous rearrangement of the upper and lower backup rolls 7.8, including pulling out the old roll and pushing in the new roll, is described above.
This is possible by combining (adding) the independent movements of the two lower backup rolls.

According to this embodiment, the following effects can be obtained.

(1) Single reclassification of only the rolls that require roll reclassification can be efficiently performed without operating rolls that do not require roll reclassification.

(2) Unlike conventional stools, there is no need to operate the lower backup roll 8 for the operation of simply inserting and unloading the stool, making it possible to efficiently change the backup rolls in a short time, reducing rolling errors. This is advantageous when a single roll needs to be rearranged due to damage caused by the roll.

(3) Simultaneous rearrangement of the upper and lower backup rolls 7.8 is possible without using any special operating procedures or equipment, simply by repeating the operations for individual rearrangement of each of the upper and lower backup rolls 7.8. .

(4) Even if the upper and lower work rolls 15 and the upper and lower intermediate rolls 14 are loaded on the roll recombination truck 5, as shown by two-dot chain lines in FIGS. 2 to 4, the main backup rolls 7.8 Since this has no effect on the rearrangement of the upper and lower backup rolls 7.8, the roll rearrangement work of the upper and lower backup rolls 7.8 is carried out as a continuous operation immediately after the roll rearrangement of either the work roll 15, the intermediate roll 14, or both. It is possible.

(5) The pull-out and push-in operation of the upper and lower backup rolls 7.8 can be carried out either individually or simultaneously by using the drive device (not shown) of the roll changing cart 5 (work roll or work roll and intermediate roll). This eliminates the need for a conventionally used drive device exclusively for back-up roll recombination, resulting in a simple and compact roll recombination device. (The large-diameter long hydraulic cylinder used in the past is no longer necessary) (6) The stool 3 for changing the upper backup roll is completely unaffected by the lower back roll 8 and the rolled material 13, so it is light in weight. can be made at low cost.

FIG. 5 shows another embodiment of the present invention, in which the same parts as in FIGS. 1 to 4 are designated by the same reference numerals.

The differences in this embodiment from the embodiment shown in FIG.
The point is that the letter "a" was omitted and the shape of the stool 3A was changed to a 15-figure shape.

In this embodiment, there may be cases where it is not possible to install the intra-mill rail 1 (see FIGS. 1 to 4) inside the rolling mill due to dimensional space or other reasons.

Therefore, in this embodiment, the role of the stool 3A is changed ff!
! By making the stool a complete overhang type that attaches to the roll changing trolley 5 only on one side of the I end, there is no need for rails in the mill.According to the second embodiment, the same effect as that of the previous embodiment can be obtained. Furthermore, there is an effect that it can be used even when the intra-mill rail for rearranging the intra-mill L backup roll cannot be left in the rolling mill.

FIG. 6 shows a further musical embodiment of the present invention, so the first
The difference from the diagram is that the rail 1 inside the mill and the hook 6a on the roll change side are omitted, the shape of the stool 3B is made into a U-shape, and the running wheels 4 are attached to the lower side of the tip of the stool 3B. In this example, due to the dimensional space inside the rolling mill, its curve, etc., the mill rail 1 (Fig. 1~
4), the running vehicle fa4 of the stool 3B is made to run on the work roll and the rail 16 for changing work rolls or intermediate rolls.

According to this embodiment, it is possible to have the same effect as the above-mentioned embodiment and also to increase the running safety of the stool 3 and the roll changing cart 5, so that the roll changing operation of the upper backup roll 7 can be carried out more safely. effective.

Still another embodiment of the present invention will be described with reference to FIG.

In the figure, the same members as those shown in FIG. 1 are given the same reference numerals. The differences between this embodiment and the embodiment shown in FIG. 1 are as follows:
The stool 3 for recombining the upper back roll is discontinued, and a tip support frame 20 for recombining the upper backup roll is provided at the tip of the roll recombining cart 5 as a part of the roll changing cart 5. A running wheel 7 supports one end of the roll assembly in a stationary state that can be pushed and pulled, and supports the other end of the assembly of the upper backup roll 7 so as to be movable on the rail 1 in the mill.
This is the point where a is provided.

In this embodiment, when recombining the upper backup roll 7 alone, the tip support frame 20 is inserted between the rails 1 in the mill between the upper and lower backup rolls 7 and 8 in the rolling mill by running the roll recombination cart 5. Then, the upper backup roll 7 is mounted on the mill inner rail 1 and the tip support frame 20.

Next, the tip support frame 20 is retreated from the inside of the rolling mill by running the roll changing cart 5 in the opposite direction.
The upper backup roll 7 can be rearranged in the same way when the upper and lower backup rolls 7.8 are simultaneously rearranged by running the upper backup roll 7 on the rail inside the mill with the running wheels 7a and pulling it out of the rolling mill.4 This implementation According to this example, it is possible to obtain the same effects as in the above-mentioned embodiment, and since the stool as a separate member of the roll changing cart 5 is not required, there is an effect that the configuration is simplified.

FIG. 8 shows still another embodiment that does not use a stool, in which an upper back-up roll outside mill rail for aligning with the mill inside rail is provided as a part of the roll changing truck 5 at the tip of the roll changing truck 5. 21, and a rail 22 which is an extension of the mill outer rail 21 is also installed on the roll changing cart 5, and the assembled product is attached to the mill inner rail 1 or the mill outer rail at both ends of the upper back roll 7 assembly. 21, 22 are provided with movably supported running wheels 7a, 7b. The assembly of the upper back roll 7 is also provided with an upper back roll hook 7c.

In this embodiment, when the upper backup roll 7 is individually reassembled, the upper backup roll 7 is placed on the rail 1 in the mill.
The outside mill rail 21 is connected to the inside mill rail 1 by running the roll recombination trolley 5, and the connecting hook of a pull-out device (not shown) running inside the roll recombination trolley 5 is connected to the upper backup roll hook 7c. Then, by retracting the drawing device, the upper backup roll 7 is caused to travel from the mill inner rail 1 to the mill outer rail 20, 21 by the running wheels 7a and 7b, and is drawn out of the rolling mill. In this embodiment, since the rail 1 and the rail 21 are separated when the roll changing cart 5 is replaced, the upper and lower backup rolls 71.8 cannot be changed at the same time.

According to this embodiment, almost the same effect as the above embodiment can be obtained, except that the upper and lower backup rolls cannot be rearranged simultaneously, and furthermore, the upper backup roll can be pulled out onto the roll rearrangement cart 5. This has the effect of making handling easier.

〔Effect of the invention〕

According to the present invention, the roll rearranging work of the upper and lower backup rolls can be performed individually or simultaneously for each roll as necessary, and there is no unnecessary wasteful operation of the lower backup roll. It is possible to perform backup role reshuffling efficiently and in a short time. In addition, the power source for this roll recombination operation uses the work roll or the drive device for the work roll and intermediate roll recombination cart, resulting in a single and compact roll recombination device with fewer equipment and maintenance parts. It has the effect of reducing equipment costs and maintenance costs.

If only one end of the stool is supported on the roll changing cart, single roll changing of the upper backup roll is possible even if there is a dimensional space restriction.

If a means for movably supporting the stool on a rail in the mill for changing backup rolls or for changing work rolls or work rolls and intermediate rolls is provided, the stool can be stably supported.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the overall configuration of a backup roll recombination device according to an embodiment of the present invention, and FIGS. 2, 3, and 4 respectively show upper backup by the backup roll recombination device. FIG. 5 is a state diagram showing single recombination of rolls, single recombination of lower backup rolls, and simultaneous recombination of upper and lower backup rolls, and FIG. 5 shows the overall configuration of a backup roll recombination device according to another embodiment of the present invention. FIG. 6 is a side view showing the overall configuration of a backup roll recombination device according to still another embodiment of the present invention, and FIG. FIG. 2 is a side view showing the overall configuration of the switching device;
FIG. 8 is a side view showing the overall configuration of a backup roll changing device according to a further embodiment of the present invention. Explanation of symbols 1...Rail inside the mill 2...Mill housing 3
．． 31.3B...Stool 3a...Connecting tip (supporting means) 4...Traveling wheels 5...Roll recombination trolley 7
... Upper backup rolls 7a, 7b... Traveling wheels (supporting means) 8... Lower backup roll 20... Tip support frame 21.22... Mill outer rail

Claims (7)

[Claims] (1) In a backup roll changing device that replaces the old and new upper and lower backup rolls in a rolling mill, there is a roll changing cart that replaces the old and new work rolls or work rolls and intermediate rolls, and the old and new upper backup rolls. and a stool for changing the upper back roll, the stool having means at one end for supporting the stool in an engaged state in which it can be pushed and pulled by the roll changing cart. Recombination device. (2) It further includes an inner mill rail for rearranging the upper back roll that is attached to the mill housing below the upper backup roll and extends in the roll axis direction from inside the mill housing window frame, and the stool is attached to the other end of the mill housing. 2. The backup roll changing device according to claim 1, further comprising means for movably supporting said stool on a rail within the mill. (3) The backup roll changing device according to claim 1, wherein the stool has an overhang type in which only one end of the stool is supported by the roll changing truck by the supporting means. (4) The mill housing further includes a work roll or an in-mill rail for changing work rolls and intermediate rolls, and the stool is movable on the other end of the mill on the in-mill rail. 2. The backup roll changing device according to claim 1, further comprising means for supporting the rolls. (5) In a backup roll changing device that replaces the upper and lower backup rolls in a rolling mill, there is a roll changing cart that replaces the old and new work rolls or work rolls and intermediate rolls, and a roll changer below the upper backup roll. an inner mill rail for upper backup roll reassembly attached to the mill housing and extending in the roll axis direction from inside the mill housing window frame; and a rail for pushing and pulling one end of the upper backup roll assembly attached to the roll reassembly truck. and a means provided on the upper backup roll assembly for movably supporting the other end of the upper backup roll assembly on the rail in the mill. A backup roll recombination device characterized by: (6) In a backup roll changing device that replaces the old and new upper and lower backup rolls in a rolling mill, there is a roll changing cart that replaces the old and new work rolls or work rolls and intermediate rolls, and a roll changer below the upper backup roll. an inner mill rail for upper backup roll rearrangement that is attached to the mill housing and extends in the roll axis direction from inside the mill housing window frame; and an upper backup roll rearrangement rail that is attached to the roll rearrangement cart and aligned with the inner mill rail. A backup roll changing device comprising an outside mill rail and means provided at both ends of the upper back roll assembly to movably support the upper back roll assembly on the inside mill rail or the outside mill rail. . (7) In a backup roll changing method for replacing the upper and lower backup rolls in a rolling mill, a roll changing cart for replacing the old and new work rolls or work rolls and intermediate rolls, and a drive for the roll changing cart. A method for changing backup rolls, which comprises using a device to change the upper and lower backup rolls individually or simultaneously.