阅读说明：本技术 多辊轧机及多辊轧机中的分割式支承轴承组装轴的更换方法 (Multi-roll mill and method for replacing split support bearing assembly shaft in multi-roll mill ) 是由 乘鞍隆 玉川正 于 2020-04-01 设计创作，主要内容包括：分割式支承轴承组装轴在机架内利用滑动机构在构成机架的机架孔上表面(8a)、喷雾器架上表面(9)、更换台车(12)的轨道(13、19、20)中的某一方上移动,在机架外利用滑动机构在更换台车(12)的轨道(13、19、20)上移动,由此从机架内拔出或向机架内插入。由此提供与以往相比容易进行轧机中的分割式支承轴承组装轴的更换的轧机及轧机中的分割式支承轴承组装轴的更换方法。(The split support bearing assembly shaft is moved by a slide mechanism inside the frame on one of the upper surface (8a) of a frame hole constituting the frame, the upper surface (9) of the sprayer frame, and rails (13, 19, 20) of the replacement carriage (12), and is moved by a slide mechanism outside the frame on the rails (13, 19, 20) of the replacement carriage (12), thereby being extracted from or inserted into the frame. Thus, a rolling mill and a method for replacing a split support bearing assembly shaft in a rolling mill are provided, in which replacement of the split support bearing assembly shaft in the rolling mill is easier than in the conventional art.)

1. A multi-roll mill of a multi-roll type, comprising:

a pair of working rolls for rolling the metal strip;

an intermediate set of rolls supporting the work rolls;

a plurality of divided support bearing assembly shafts each composed of a divided support bearing, a shaft, and a saddle for supporting the intermediate roller group;

a frame supporting the saddle;

a sliding device provided on at least a drive side of the divided support bearing assembly shaft; and

a replacement trolley provided on the operation side of the frame and having a rail on which the divided support bearing assembly shaft can be mounted,

the divided support bearing assembly shaft is moved by the slide mechanism within the frame on one of an upper surface of a frame hole constituting the frame, an upper surface of a sprayer frame, and a rail of the replacement carriage, and is moved by the slide mechanism outside the frame on the rail of the replacement carriage, thereby being pulled out of the frame or inserted into the frame.

2. The multi-roll mill according to claim 1,

the intermediate roller group is composed of a 1 st intermediate roller supporting the upper and lower pairs of the working rollers and a 2 nd intermediate roller supporting the upper and lower three pairs of the 1 st intermediate roller,

the divided support bearing assembly shaft supports the 2 nd intermediate roller in four upper and lower pairs,

the stand is a rolling mill stand.

3. The multi-roll mill according to claim 1,

the middle roller group is composed of 1 st middle roller which supports the upper and lower pairs of the working rollers,

the divided support bearing assembly shaft supports the 1 st intermediate roller in three pairs of upper and lower,

the stand is composed of upper and lower roll stands supporting the saddle and a connecting device for the upper and lower roll stands.

4. The multi-roll mill according to claim 1,

the sliding device is one of a wheel rolling on the rail and a slide plate moving by sliding on the rail.

5. The multi-roll mill according to claim 1,

the upper surface of the replacement trolley provided with the rail is the same as the upper surface of the rack hole or the upper surface of the sprayer frame in shape and size.

6. The multi-roll mill according to claim 1,

the sliding apparatus is provided on the drive side and the operating side of the split support bearing assembly shaft.

7. The multi-roll mill according to claim 2,

the mill stand is a single, unitary stand.

8. The multi-roll mill according to claim 2,

the rolling stand consists of an upper rolling stand and a lower rolling stand,

the upper and lower roll stands are connected to each other by a tension rod and at least one of a prestressing cylinder, a lifting cylinder, and a worm screw so that the upper roll stand can be lifted and lowered.

9. The multi-roll mill according to claim 2,

the rolling mill frame is composed of an upper rolling mill inner frame, a rolling line adjusting device for supporting the upper rolling mill inner frame, a lower rolling mill inner frame, a main cylinder for supporting the lower rolling mill inner frame, and a rolling mill outer frame for supporting the rolling line adjusting device and the main cylinder.

10. A method of replacing a split support bearing assembly shaft in a multi-roll mill for rolling a metal strip, characterized in that,

the multi-roll mill comprises: a pair of work rolls for rolling the metal strip; an intermediate set of rolls supporting the work rolls; a plurality of divided support bearing assembly shafts each composed of a divided support bearing, a shaft, and a saddle for supporting the intermediate roller group; a frame supporting the saddle; a sliding device provided on at least a drive side of the divided support bearing assembly shaft; and a replacement carriage provided on the operation side of the frame and having a rail on which the split support bearing assembly shaft can be placed,

the split support bearing assembly shaft is moved by the slide mechanism in the frame on one of an upper surface of a frame hole constituting the frame, an upper surface of a sprayer frame, and a rail of the replacement carriage, and is moved by the slide mechanism outside the frame on the rail of the replacement carriage, whereby the split support bearing assembly shaft is pulled out of the frame and inserted into the frame.

Technical Field

The present invention relates to a cluster mill and a method of replacing a split bearing (backing) assembly shaft in the cluster mill.

Background

As an example of a method of replacing a split support bearing assembly shaft in a multi-roll type rolling mill, non-patent document 1 describes replacement using a roll changing sleeve with a counterweight suspended by an overhead crane.

Documents of the prior art

Non-patent document

Non-patent document 1: "わ (typewriter) コールドストリップ (the closest possible people of における from japan's iron and steel association and a preferable manufacturing technique (the latest advancement in our country of cold-rolled strip manufacturing facility and manufacturing technique)", and japanese iron and steel association, 1977, 8 months, p.68-69

Disclosure of Invention

As shown in fig. 1 and 2, a conventional 20-high rolling mill rolls a strip 1 as a material to be rolled by a pair of upper and lower work rolls 2.

The upper and lower pair of work rolls 2 are supported in contact with the upper and lower pair of 1 st intermediate rolls 3, respectively. The upper and lower pairs of 1 st intermediate rollers 3 are supported in contact with the upper and lower pairs of 2 nd intermediate rollers 4, respectively.

Then, the upper and lower third pairs of 2 nd intermediate rollers 4 are respectively supported in contact with upper and lower four pairs of split support bearing assembly shafts constituted by split support bearings 105, shafts 106, and saddles 107.

In addition, the four upper and lower pairs of split support bearing assembly shafts are supported by the single frame 108 by the saddles 107, and are fixed to the single frame 108 by the clamping operation of the saddle clamps 123.

In such a conventional multi-roll mill such as a 20-roll mill or a 12-roll mill, it is necessary to periodically replace the work rolls, the intermediate rolls, and the split support bearing assembly shafts.

Here, in the conventional multi-roll type 20-high rolling mill shown in fig. 3 and 4, the upper divided support bearing assembly shaft A, B, C, D is replaced by inserting and extracting the same into and from the rolling mill using the weighted roll changing sleeve 43 lifted by the overhead traveling crane as described in non-patent document 1.

The lower divided support bearing assembly shaft E, F, G, H is also replaced by being pulled out and inserted by using the weighted replacement sleeve 43 lifted by the overhead traveling crane, as shown in fig. 5 and 6.

However, since the roll changing sleeve 43 with a counterweight suspended by a bridge crane is used, skill is required for stable operation, and workability is problematic.

In addition, since the bridge crane cannot be used for other operations during this period, it becomes a bottleneck in various processes before restarting the operation, and therefore an apparatus and a method for solving these problems are desired.

The present invention has been made in view of the above-described problems, and an object thereof is to provide a cluster mill and a method of replacing a split support bearing assembly shaft in a cluster mill, in which replacement of the split support bearing assembly shaft is easier than before.

The present invention includes a plurality of solutions to the above problems, and is a multi-roll type multi-roll rolling mill including, as an example, the following: a pair of working rolls for rolling the metal strip; an intermediate roller group for supporting the working rollers; a plurality of divided support bearing assembly shafts composed of divided support bearings, shafts and saddles for supporting the intermediate roller sets; a frame for supporting the saddle; a sliding device provided on at least a drive side of the divided support bearing assembly shaft; and a replacement carriage provided on an operation side of the frame and having a rail on which the divided support bearing assembly shaft can be mounted, wherein the divided support bearing assembly shaft is moved by the slide mechanism in the frame in one of an upper surface of a frame hole constituting the frame, an upper surface of the sprayer frame, and a rail of the replacement carriage, and is moved by the slide mechanism outside the frame in the rail of the replacement carriage, thereby being extracted from or inserted into the frame.

Effects of the invention

According to the present invention, the replacement of the split support bearing assembly shaft in the cluster mill is easier than in the related art. Problems, structures, and effects other than those described above will be apparent from the following description of the embodiments.

Drawings

Fig. 1 is a front view of a conventional 20-high rolling mill.

Fig. 2 is a sectional view a-a' of fig. 1.

Fig. 3 is a diagram illustrating a state in which a conventional roll change sleeve is used to pull out an upper split bearing assembly shaft.

Fig. 4 is a diagram illustrating a state after the upper split bearing assembly shaft is pulled out by the conventional roll change sleeve.

Fig. 5 is a diagram illustrating a state in which a conventional roll change sleeve is used to pull out a lower split bearing assembly shaft.

Fig. 6 is a diagram illustrating a state after the pull-out of the lower split bearing assembly shaft by the roll change sleeve in the related art.

Fig. 7 is a front view of a 20-high rolling mill according to embodiment 1 of the present invention.

Fig. 8 is a sectional view B-B' of fig. 7.

Fig. 9 is a cross-sectional view showing a part of the structure of the replacement cart in embodiment 1.

Fig. 10 is a cross-sectional view showing a part of the structure of the exchange cart in embodiment 1.

Fig. 11 is a diagram for explaining a state in which the lower split bearing assembly shaft is pulled out in embodiment 1.

Fig. 12 is a diagram for explaining a state after the lower split bearing assembly shaft is pulled out in embodiment 1.

Fig. 13 is a diagram for explaining a state when the upper-split bearing assembly shaft in embodiment 1 is pulled out.

Fig. 14 is a diagram for explaining a state after the upper split bearing assembly shaft in embodiment 1 is pulled out.

Fig. 15 is a diagram for explaining the state of embodiment 1, and is a diagram for explaining the state when the lower split bearing assembly shaft is pulled out.

Fig. 16 is a diagram illustrating the state of embodiment 1, and is a diagram illustrating the state after the upper split bearing assembly shaft is pulled out.

Fig. 17 is a front view of a 20-high rolling mill according to embodiment 2 of the invention.

Fig. 18 is a front view of a 20-high rolling mill according to embodiment 3 of the present invention.

Fig. 19 is a front view of a 12-high rolling mill according to embodiment 4 of the present invention.

Detailed Description

Embodiments of a rolling mill and a method of replacing a split support bearing assembly shaft in the rolling mill according to the present invention will be described below with reference to the accompanying drawings.

< embodiment 1 >

A rolling mill and a method of replacing a split support bearing assembly shaft in a rolling mill according to embodiment 1 of the present invention will be described with reference to fig. 7 to 16.

Fig. 7 is a front view of the 20-high rolling mill of the present embodiment, fig. 8 is a sectional view taken along line B-B 'of fig. 7, fig. 9 is a view showing a section of a portion of the replacement carriage corresponding to a section C-C of fig. 12 described later, and fig. 10 is a view showing a section of a portion of the replacement carriage corresponding to a section D-D' of fig. 14 described later. Fig. 11 and 12 are views for explaining a state in which the lower split bearing assembly shaft is pulled out, and fig. 13 and 14 are views for explaining a state in which the upper split bearing assembly shaft is pulled out. Fig. 15 and 16 are views for explaining a state in which the split bearing assembly shaft is pulled out in another example.

As shown in fig. 7, the multi-roll mill 100 of the present embodiment is a multi-roll (cluster) type 20-roll mill for rolling a strip 1, and is particularly suitable for rolling a hard material such as a stainless steel sheet, an electromagnetic steel sheet, or a copper alloy.

In fig. 7, the multi-roll mill 100 includes, as rolls, a pair of upper and lower work rolls 2, a pair of upper and lower 1 st intermediate rolls 3, a pair of upper and lower 2 nd intermediate rolls 4, and four pairs of upper and lower upper divided support bearing assembly shafts A, B, C, D and lower divided support bearing assembly shafts E, F, G, H each including a divided support bearing 5, a shaft 6, and a saddle (saddle) 7.

As shown in fig. 7 and 8, a pair of upper and lower work rolls 2 roll a strip 1 as a material to be rolled.

The upper and lower pair of work rolls 2 are supported in contact with the upper and lower pair of 1 st intermediate rolls 3, respectively. The upper and lower pairs of 1 st intermediate rollers 3 are supported in contact with the upper and lower pairs of 2 nd intermediate rollers 4, respectively.

In the present embodiment, the 1 st intermediate roll 3 and the 2 nd intermediate roll 4 constitute an intermediate roll group that supports the work rolls 2.

In the cluster mill 100 of the present embodiment, the upper and lower third pairs of 2 nd intermediate rolls 4 are supported in contact with the upper split support bearing assembly shaft A, B, C, D and the lower split support bearing assembly shaft E, F, G, H, respectively.

The eight divided support bearing assembly shafts are supported by the single unit frame 8 by the saddles 7 thereof, and are fixed to the single unit frame 8 by the clamping operation of the saddle clamps 23.

In the eight split support bearing assembly shafts in the cluster mill 100 of the present embodiment, two arms 11 are provided on the drive side of each shaft 6, the single wheels 10 are provided at the distal end portions of the two arms 11, two arms 11 are also provided on the operation side of the shaft 6, the single wheels 10 are provided at the distal end portions of the two arms 11, and four arms 11 in total are provided.

The wheel 10 corresponds to a sliding device, and specifically rolls on rails 13, 19, and 20 described later.

The arm 11 and the wheel 10 may be provided only on at least the driving side of the split support bearing assembly shaft, but are desirably provided on both the driving side and the operating side from the viewpoint of workability.

Further, the case where two arms 11 and two wheels 10 are provided at one end portion of one split support bearing assembly shaft has been described, but one arm and three or more wheels may be provided.

That is, at least one arm 11 and one wheel 10 need only be provided for one split support bearing assembly shaft, but it is desirable to provide two or more of each on at least both end sides of the shaft 6 in order to achieve stable replacement work.

Here, as shown in fig. 8, for the wheel 10 on the lower 1 st, 2 nd, 3 rd, and 4 th lower divided support bearing assembly shafts among the eight divided support bearing assembly shafts, notch grooves 8c and 8b are provided on the operation side and the driving side end portions of the frame hole (housing bore) upper surface 8a of the single frame 8, respectively, in order to avoid a large load from being applied to the wheel 10 during rolling.

Similarly, for the wheels 10 of the upper 1 st and 4 th upper divided support bearing assembly shafts a and D, notch grooves (omitted for convenience of illustration) are provided on the operation side and the driving side end portions of the sprayer housing upper surface 9 attached to the single housing 8 so as to avoid a large load from being applied to the wheels during rolling.

Further, in the cluster mill 100 of the present embodiment, as shown in fig. 9 to 12, a replacement carriage 12 is provided on the operation side of the single stand 8.

As shown in fig. 9, a split support bearing assembly shaft replacement rail 13 having the same shape and the same size as the frame hole upper surface 8a of the single frame 8 is attached to the upper surface side of the replacement carriage 12, and the 1 st, 2 nd, 3 rd, and 4 th split support bearing assembly shafts E, F, G, and H can be horizontally moved without moving in the vertical direction.

As shown in fig. 10, the metal fitting 18 having the split support bearing assembly shaft replacement rails 19 and 20 formed thereon can be detached and attached to the replacement carriage 12.

The upper surface of the divided support bearing assembly shaft replacement rail 19 is formed so as to be able to horizontally move the 2 nd upper divided support bearing assembly shaft B and the 3 rd upper divided support bearing assembly shaft C without moving in the vertical direction.

The upper surface of the divided support bearing assembly shaft replacement rail 20 is formed in the same shape and the same size as the upper surface 9 of the sprayer housing so that the 1 st upper divided support bearing assembly shaft a and the 4 th upper divided support bearing assembly shaft D can be horizontally moved without moving in the vertical direction.

As shown in fig. 9 and 10, a plurality of saddle guide rollers 24 are provided in the portions of the divided support bearing assembly shaft replacement rails 13, 19, and 20 of the replacement truck 12, so that the eight divided support bearing assembly shafts can be rolled more smoothly without rotating.

The replacement cart 12 is provided with a plurality of wheels 14 at a lower portion thereof, and can travel along a rail 15 formed on a floor of a facility or the like where the multi-roll mill 100 is installed so as to approach or separate from the multi-roll mill 100.

In fig. 7 and the like, the description has been given of the case where the wheel 10 provided at the tip end of the arm 11 is used as the slide device provided on the eight split support bearing assembly shafts, but the slide device is not limited to the wheel 10.

For example, the following configuration may be adopted: instead of the wheel 10, a slide plate is provided on the tip end side of the arm 11, and the eight split support bearing assembly shafts are moved by sliding the slide plate on the frame hole upper surface 8a, the sprayer frame upper surface 9, or the rails 13, 19, and 20.

In this case, it is desirable to provide a slide liner instead of the saddle guide rollers 24.

Next, a method of replacing the split support bearing assembly shaft in the cluster mill 100 of the present embodiment will be described with reference to fig. 11 to 16.

The work rolls 2, the 1 st intermediate roll 3, and the 2 nd intermediate roll 4 can be pulled out by various known means such as manual operation.

First, a method of replacing the 1 st lower divided support bearing assembly shaft E, the 2 nd lower divided support bearing assembly shaft F, the 3 rd lower divided support bearing assembly shaft G, and the 4 th lower divided support bearing assembly shaft H among the eight divided support bearing assembly shafts will be described.

First, the clamping operation of the saddle clamp 23 is released.

Then, as shown in fig. 11 and 12, the 1 st lower divided support bearing assembly shaft E, the 2 nd lower divided support bearing assembly shaft F, the 3 rd lower divided support bearing assembly shaft G, and the 4 th lower divided support bearing assembly shaft H are manually rolled on the frame hole upper surface 8a by the wheel 10 in the single frame 8.

As shown in fig. 12, the single-unit frame 8 can be removed from the single-unit frame 8 by manually rolling the wheel 10 on the split support bearing assembly shaft replacement rail 13 of the replacement carriage 12.

Then, the 1 st lower divided support bearing assembly shaft E, the 2 nd lower divided support bearing assembly shaft F, the 3 rd lower divided support bearing assembly shaft G, and the 4 th lower divided support bearing assembly shaft H are respectively lifted and moved by an overhead crane or the like.

Further, the new 1 st lower split support bearing assembly shaft E, the 2 nd lower split support bearing assembly shaft F, the 3 rd lower split support bearing assembly shaft G, and the 4 th lower split support bearing assembly shaft H are placed on the split support bearing assembly shaft replacement rail 13 of the replacement carriage 12, respectively.

Then, the wheel 10 is manually operated outside the single frame 8 to roll on the split support bearing assembly shaft replacement rail 13; in the single unit frame 8, it is manually rolled on the frame hole upper surface 8a by the wheel 10, thereby being inserted into the single unit frame 8.

After the insertion, the saddle clamp 23 is clamped, and the replacement operation is ended.

Next, a method of replacing the 1 st upper split type support bearing assembly shaft a, the 2 nd upper split type support bearing assembly shaft B, the 3 rd upper split type support bearing assembly shaft C, and the 4 th upper split type support bearing assembly shaft D will be described.

First, the clamping operation of the saddle clamp 23 is released.

Then, as shown in fig. 10, a fitting 18 is attached to the upper portion of the replacement cart 12, and a split support bearing assembly shaft replacement rail 19 and a split support bearing assembly shaft replacement rail 20 are attached to the fitting 18.

Then, as shown in fig. 13 and 14, the 1 st upper divided support bearing assembly shaft a and the 4 th upper divided support bearing assembly shaft D are manually moved on the upper surface 9 of the sprayer frame by rolling with the wheels 10 in the single body frame 8.

Further, the wheel 10 is manually moved by rolling on the split support bearing assembly shaft replacement rail 20 of the attachment 18 on the replacement carriage 12 outside the single frame 8, and thereby can be pulled out from the single frame 8.

Further, the 2 nd upper split support bearing assembling shaft B and the 3 rd upper split support bearing assembling shaft C can be pulled out from the single frame 8 by manually rolling them on the split support bearing assembling shaft replacement rail 19 of the fitting 18 on the replacement cart 12 by the wheels 10 inside and outside the single frame 8 as shown in fig. 14.

Then, the 1 st upper divided support bearing assembly shaft a, the 2 nd upper divided support bearing assembly shaft B, the 3 rd upper divided support bearing assembly shaft C, and the 4 th upper divided support bearing assembly shaft D are respectively lifted and moved by an overhead traveling crane or the like.

Further, new 1 st upper split type support bearing assembling shaft a, 2 nd upper split type support bearing assembling shaft B, 3 rd upper split type support bearing assembling shaft C, and 4 th upper split type support bearing assembling shaft D are respectively placed on the split type support bearing assembling shaft replacement rails 19, 20 of the replacement cart 12, and can be inserted into the single body frame 8 in a reverse action at the time of extraction.

The operation of inserting and removing the lower split support bearing assembly shaft E, F, G, H can be performed by a hydraulic cylinder or a motor cylinder 16 attached to the replacement cart 12 via a clamp device 17, as shown in fig. 15.

The operation of inserting and extracting the upper split support bearing assembly shaft A, B, C, D can be performed by a hydraulic cylinder or a motor cylinder 21 attached to the attachment 18 on the exchange cart 12 via the clamp device 22, as shown in fig. 16.

Next, the effects of the present embodiment will be explained.

The multi-roll type multi-roll mill 100 according to embodiment 1 of the present invention includes: a pair of work rolls 2 for rolling the strip plate 1; an intermediate roll group supporting the work rolls 2; a plurality of divided support bearing assembly shafts composed of a divided support bearing 5, a shaft 6 and a saddle 7 for supporting the intermediate roller set; a frame supporting the saddle 7; a sliding device provided on at least a drive side of the divided support bearing assembly shaft; and a replacing trolley 12 which is arranged at the operation side of the frame and is provided with rails 13, 19 and 20 capable of loading the split type supporting bearing assembling shaft, wherein the split type supporting bearing assembling shaft moves on one of the upper surface 8a of the frame hole, the upper surface 9 of the sprayer frame and the rails 13, 19 and 20 of the replacing trolley 12 in the frame by a sliding mechanism, and moves on the rails 13, 19 and 20 of the replacing trolley 12 outside the frame by the sliding mechanism, thereby being pulled out from the frame or inserted into the frame.

In this way, in the multi-roll type multi-roll mill particularly suitable for hard materials such as stainless steel plates, electromagnetic steel plates, copper alloys, etc., the split support bearing assembling shaft can be replaced without using a roll changing sleeve lifted by an overhead crane by providing a slide device for the split support bearing assembling shaft and providing a replacement carriage having good operability capable of moving the split support bearing assembling shaft in the horizontal direction, and thus workability can be greatly improved.

Further, since the slide device is one of the wheel 10 rolling on the rails 13, 19, 20 and the slide plate moving by sliding on the rails 13, 19, 20, the split support bearing assembly shaft can be moved horizontally with a simple structure and without applying a large force, and the replacement work can be performed more easily.

Further, the upper surface of the replacement carriage 12 on which the rails 13, 19, 20 are disposed has the same shape and the same size as the frame hole upper surface 8a or the sprayer frame upper surface 9, so that the split support bearing assembly shaft can be moved horizontally more stably, and the replacement work can be performed more easily.

Further, the slide device is provided on the drive side and the operation side of the split support bearing assembly shaft, whereby the split support bearing assembly shaft can be moved horizontally more accurately and reliably, and the replacement work can be performed more easily.

< embodiment 2 >

A rolling mill and a method of replacing a split support bearing assembly shaft in the rolling mill according to embodiment 2 of the present invention will be described with reference to fig. 17. Fig. 17 is a front view of the 20-high rolling mill of the present embodiment.

In this embodiment, the same structures as those of embodiment 1 are denoted by the same reference numerals and description thereof is omitted. The same applies to the following embodiments.

As shown in fig. 17, the multi-roll mill 100A of the present embodiment replaces the single stand 8 of the multi-roll mill 100 of embodiment 1, which is composed of an upper roll stand 25 and a lower roll stand 26.

The upper and lower stands 25 and 26 are connected to each other in a prestressed state by four prestressing cylinders 28 and tie rods (tie rod) 27.

The other configurations and operations are substantially the same as those of the rolling mill and the method of replacing the split support bearing assembly shaft in the rolling mill according to embodiment 1 described above, and the details are omitted.

The rolling mill and the method of replacing the split back-up bearing assembly shaft in the rolling mill according to embodiment 2 of the present invention also provide substantially the same effects as those of embodiment 1 described above.

In addition, in the multi-roll mill 100A of the present embodiment, since the prestress load is generated by the prestress cylinder 28 and the tension rod 27 during the rolling process, an effect is obtained that high rolling rigidity can be secured and a high quality plate with high plate thickness accuracy can be rolled. In addition, the prestressing cylinder 28 is opened and the upper roll stand 25 is opened to a greater extent during the threading and the roll change, so that an easier threading and roll change is achieved.

Further, although an example in which the upper mill stand 25 is coupled to the lower mill stand 26 so as to be movable up and down by the tie rod 27 and the prestressing cylinder 28 has been described, the coupling method is not limited to this, and the upper mill stand 25 may be coupled to the lower mill stand 26 so as to be movable up and down by the tie rod and the lifting cylinder or by the tie rod and a worm screw (work screw) as in embodiment 4 described later.

< embodiment 3 >

A rolling mill and a method of replacing a split support bearing assembly shaft in the rolling mill according to embodiment 3 of the present invention will be described with reference to fig. 18. Fig. 18 is a front view of the 20-high rolling mill of the present embodiment.

As shown in fig. 18, the 100B of the present embodiment replaces the single stand 8 of the cluster mill 100 of embodiment 1, which is constituted by the upper and lower inner stands 29 and 30.

Further, a pass line adjusting device 31 is disposed on the operating side and the driving side of the upper portion of the upper inner stand 29, and a main jack 32 is disposed on the operating side and the driving side of the lower portion of the lower inner stand 30.

The pass line adjusting device 31 and the main jack 32 are supported by the outer stand 33 on the operation side and the drive side.

The other configurations and operations are substantially the same as those of the rolling mill and the method of replacing the split support bearing assembly shaft in the rolling mill according to embodiment 1 described above, and the details are omitted.

The rolling mill and the method of replacing the split back-up bearing assembly shaft in the rolling mill according to embodiment 3 of the present invention also provide substantially the same effects as those of embodiment 1 described above.

In addition, in the multi-roll mill 100B of the present embodiment, the effect of rolling a high-quality plate with high plate thickness accuracy can be obtained by utilizing the highly responsive reduction of the main jack 32 during the rolling process. Further, at the time of passing and roll replacement, the main jack 32 is opened to open the lower inner stand 30 largely, so that the effect of facilitating the passing and roll replacement is obtained.

< example 4 >

A rolling mill and a method of replacing a split support bearing assembly shaft in the rolling mill according to embodiment 4 of the present invention will be described with reference to fig. 19. Fig. 19 is a front view of the 12-high rolling mill of the present embodiment.

As shown in fig. 19, the multi-rolling mill 100C of the present embodiment is a 12-roll mill of a multi-roll type for rolling the strip plate 1.

As shown in fig. 19, the cluster mill 100C includes a pair of upper and lower work rolls 2, a pair of upper and lower 1 st intermediate rolls 3, and three pairs of upper and lower upper divided support bearing assembly shafts I, J, K and lower divided support bearing assembly shafts L, M, N each including a divided support bearing 34, a shaft 35, and a saddle 36.

The upper and lower pair of work rolls 2 are supported in contact with the upper and lower pair of 1 st intermediate rolls 3, respectively. In the present embodiment, the 1 st intermediate roll 3 constitutes an intermediate roll group that supports the work rolls 2.

In the cluster mill 100C of the present embodiment, the upper and lower pairs of 1 st intermediate rolls 3 are supported in contact with the upper split support bearing assembly shaft I, J, K and the lower split support bearing assembly shaft L, M, N, respectively.

Of the six split support bearing assembly shafts, the 1 st, 2 nd and 3 rd split support bearing assembly shafts I, J and K are supported by the upper mill stand 39 by respective saddles 36.

Similarly, the 1 st, 2 nd and 3 rd lower split support bearing assembly shafts L, M and N are supported by the lower mill housing 40 by the respective saddles 36.

The upper roll stand 39 and the lower roll stand 40 are coupled by four tie rods 42 and worm screws 41, and the upper roll stand 39 can be raised and lowered relative to the lower roll stand 40 by the operation of the worm screws 41.

In the six split support bearing assembly shafts in the cluster mill 100C of the present embodiment, two arms 37 are provided on the drive side of each shaft 35, a single wheel 38 is provided at the tip end portions of the two arms 37, two arms 37 are also provided on the operation side of the shaft 35, a single wheel 38 is provided at the tip end portions of the two arms 37, and four arms 37 in total are provided.

Further, as in embodiment 1, at least one arm 37 and one wheel 38 may be provided for one divided support bearing assembly shaft, and a slide plate may be provided on the tip end side of the arm 37 instead of the wheel 38.

The method of replacing the split support bearing assembly shaft in the cluster mill 100C of the present embodiment is the same as that of embodiment 1, and the details thereof are omitted.

The other configurations and operations are substantially the same as those of the rolling mill and the method of replacing the split support bearing assembly shaft in the rolling mill according to embodiment 1 described above, and the details are omitted.

As in embodiment 4 of the present invention, the intermediate roll group is constituted by the 1 st intermediate roll 3 supporting the two upper and lower pairs of the work rolls 2, the divided support bearing assembly shafts are three upper and lower pairs and support the 1 st intermediate roll 3, and the stands are constituted by the upper and lower roll stands 39 and 40 supporting the saddles 7, the tie rods 42, and the worm screws 41, and the similar effects to those of the above-described embodiment 1 are also obtained in the multi-roll mill 100C and the method of replacing the divided support bearing assembly shafts.

Further, the cluster mill 100C of the present embodiment has an advantage of a small number of rolls.

< Others >

The present invention is not limited to the above-described embodiments, and includes various modifications. The above-described embodiments are described in detail for easy understanding of the present invention, and are not limited to the embodiments having all the structures described.

Further, a part of the structure of one embodiment may be replaced with the structure of another embodiment, and the structure of another embodiment may be added to the structure of one embodiment. In addition, a part of the configuration of each embodiment can be added, deleted, or replaced with another configuration.

For example, the method of replacing the split support bearing assembly shaft of the present invention can be applied by performing an additional work of replacing the carriage 12 and equipment accompanying the replacement of the carriage on a conventional multi-roll type multi-roll rolling mill, and modifying the frame hole upper surface 8a of the single type frame 8 and/or the spray frame upper surface 9, the saddle 7, the saddle clamp 23, and the like in the frame. With this, even in the conventional multi-roll type multi-roll mill, the same effects as those of the above-described embodiment 1 and the like can be obtained.

Description of the reference numerals

1: belt plate (Metal belt plate)

2: working roll

3: 1 st intermediate roll

4: 2 nd intermediate roll

5. 34: split type support bearing

6. 35: shaft

7. 36: saddle seat

8: single frame

8 a: upper surface of the frame hole

8 b: trough

8 c: trough

9: upper surface of sprayer frame

10. 38: wheel of vehicle

11. 37: arm(s)

12: change platform truck

13: track for replacing split type supporting bearing assembly shaft

14: wheel of vehicle

15: track

16: motor cylinder

17: clamping device

18: accessory

19: track for replacing split type supporting bearing assembly shaft

20: track for replacing split type supporting bearing assembly shaft

21: motor cylinder

22: clamping device

23: saddle clamp

24: saddle guide roller

25. 39: upper rolling mill frame

26. 40: lower mill frame

27: pull rod

28: prestressed cylinder

29: upper rolling mill inner frame

30: lower mill inner frame

31: rolling line adjusting device

32: main jack (Master cylinder)

33: outer frame of rolling mill

41: worm screw (Upper and lower rolling mill frame connecting device)

42: pull rod (Upper and lower rolling mill frame connecting device)

100. 100A, 100B, 100C: multi-roller rolling mill

A: 1 st upper divided type supporting bearing assembling shaft

B: 2 nd upper divided type supporting bearing assembling shaft

C: no. 3 upper divided type supporting bearing assembling shaft

D: 4 th upper divided type supporting bearing assembling shaft

E: 1 st lower divided support bearing assembly shaft F: the lower divided type supporting bearing assembling shaft G: and (3) a lower divided bearing assembling shaft H: and (4) a lower divided bearing assembly shaft I: 1 st upper divided support bearing assembly shaft J: the 2 nd upper divided type supporting bearing assembling shaft K: 3, upper divided support bearing assembly shaft L: 1 st lower divided support bearing assembly shaft M: the lower divided type supporting bearing assembling shaft N: and 3, supporting the bearing assembly shaft in a lower split mode.