JPH0796121B2 - Rolling mill capable of switching between 4 and 5 stages - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rolling mill that can switch between a four-high roll and a five-high roll, and particularly facilitates roll recomposition to improve operability in the five-high rolling. 4 stages 5 with improved spindle support device
The present invention relates to a rolling mill capable of switching between stages, a spindle support device for the rolling mill, a roll assembly including the spindle support device, and a method of operating a rolling mill capable of switching between four and five stages.

[Conventional technology]

A conventional four-high rolling mill has a structure in which two work rolls are driven via a spindle coupling as described in, for example, Japanese Patent Laid-Open No. 60-37205.

Further, in the 5-high rolling mill, as described in Japanese Patent Publication No. 60-48242, one large-diameter work roll is driven through a spindle coupling, and the small-diameter work roll passes through a rolled material rather than the large-diameter work roll. It has a structure to be rotated subordinately.

Further, in the case of driving one work roll in such a five-high rolling mill, in order to improve the biting property of the rolled material, the non-driving side back roll which drives the non-driving side roll by driving the non-driving side roll Roll help drive method and work that kisses the upper and lower work rolls to help drive the non-driving side rolls to a predetermined roll opening just before biting, and bites the rolled material while the non-driving side rolls are rotating by inertia Measures such as a help drive method using a roll kiss are taken.

[Problems to be Solved by the Invention]

In the above-mentioned prior art, when switching from a four-stage roll to a five-stage roll or from a five-stage roll to a four-stage roll, the spindle corresponding to the non-driving side roll which is unnecessary in the five-stage roll is removed or Since it has to be mounted, it takes a lot of time and labor to change the rolls, which hinders its use as a switchable rolling mill.

Further, in order to improve the biting property of the rolled material when driving one work roll in a five-high rolling mill, the conventional technique is adopted.
For example, in the non-drive side back roll help drive method mentioned above, there is a problem that equipment for back roll drive needs to be newly installed, and there is a problem that the equipment cost is required, and in the help drive method using the work roll kiss, if a control error occurs, etc. There is a risk of collision between rolled material and rolls.

An object of the present invention is to switch from four-high rolls to five-high rolls or from five-high rolls to four-high rolls without substantially changing the equipment of the existing four-high rolling mill and changing the combinations between the four high rolls. The purpose of the present invention is to provide a 4-high and 5-high switchable rolling mill that can be realized with the same degree of ease as.

Another object of the present invention is to provide a 4-high and 5-high switchable rolling mill capable of performing work roll drive at the time of biting for improving the biting property of the rolled material without substantially changing the conventional equipment. .

[Means for Solving the Problems]

The purpose is to connect two work rolls to each of two spindles, drive the two work rolls to perform rolling, and one work roll to the two rolls.
Is connected to one of the two spindles and drives that one work roll, while the other one work roll is not connected to the other one of the two spindles and is supported by an intermediate roll. In a rolling mill that can be switched to a 5-high roll for rolling, a spindle support device that rotatably supports another spindle that does not drive the work roll when rolling with the 5-high roll, The spindle support device includes a spindle support main body having a connecting portion that can be inserted into the other one spindle, and a bearing device that rotatably connects the spindle support main body to a shaft end of the intermediate roll. It is achieved by

Preferably, the bearing device of the spindle support device is provided between the inner circumference of the spindle support body and the outer circumference of the shaft end of the intermediate roll, and the shaft end of the intermediate roll is rotatable with respect to the spindle support body. Includes a bearing to connect to.

Further, preferably, the bearing device of the spindle support device is provided between the inner circumference of the bearing box of the intermediate roll and the outer circumference of the spindle support body, and the spindle support body is rotatably connected to the bearing box. And a bearing for rotating the spindle support main body and the intermediate roll.

Further, the above object is achieved by the spindle support device further including a power transmission mechanism with a clutch that selectively transmits the power of the spindle to the shaft end of the intermediate roll.

Further, the above object is achieved by a roll assembly including the intermediate roll and the spindle support device provided at the shaft end of the intermediate roll.

Further, the above-mentioned object is to connect two work rolls to each of two spindles and drive the two work rolls for rolling to obtain a four-stage roll and one work roll for the two work rolls. It is connected to one of the spindles and drives that one work roll, while the other one work roll is not connected to the other one of the two spindles and is supported by an intermediate roll. In a rolling mill capable of switching to a 5-high roll for rolling, a spindle support device for rotatably supporting another spindle that does not drive the work roll during rolling with the 5-high roll is provided. The spindle support device is rotatably attached to the frame positioned adjacent to the two work rolls, and is driven to rotate when the other one spindle is mounted. It is accomplished by being constituted by a rolling member rotatably supporting.

Further, the above-mentioned object is to connect two work rolls to each of two spindles, and drive the two work rolls to perform rolling, and a four-stage roll, and one work roll of the two work rolls. The one work roll is connected to one of the spindles, and the other work roll is not connected to the other one of the two spindles but is supported by the intermediate roll. In a method of operating a rolling mill capable of switching to a 5-roll roll for rolling, the other one spindle that does not drive the work roll is rotatable around the shaft end of the intermediate roll when rolling with the 5-roll. And a power transmission mechanism with a clutch for selectively transmitting the power of the other spindle to the shaft end of the intermediate roll. When rolling, another spindle that does not drive the work roll is rotatably supported on the shaft end of the intermediate roll by a spindle support device, and when the rolling material is engaged, the clutch is connected to This is achieved by driving with two rolls, one work roll and the intermediate roll, and after engagement, releasing the connection of the clutch and driving with the one work roll.

[Action]

In the four-stage and five-stage switchable rolling mill of the present invention configured as described above, the spindle support device is rotatably attached to the shaft end of the intermediate roll when the roll is changed from the fourth stage to the fifth stage, and the spindle support is provided. The device is connected to another spindle that does not drive the work rolls, the non-drive side spindle. As a result, the non-driving side spindle is rotatably supported by the roll shaft end, and power is not transmitted from the spindle to the roll. Therefore, it is not necessary to attach and detach the spindle when changing the rolls from the fourth stage to the fifth stage.

Also, by supporting the non-driving side spindle by shifting it from the axial center of the intermediate roll, the non-driving side spindle can be made to coincide with or come close to the spindle axial center position in the case of four stages, and the existing spindle Since the drive side spindle does not have an excessive tilt angle, the spindle can be supported without difficulty in terms of strength.

Further, by providing a power transmission mechanism with a clutch that selectively transmits the power of the non-drive side spindle to the shaft end of the intermediate roll, the intermediate roll can be selectively driven,
Work roll drive can be performed when biting rolled material with existing equipment, and biting property of rolled material can be improved.

〔Example〕

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

In the rolling mill capable of switching between the four-high and five-high rolls of this embodiment, the work rolls 1 and 2 are connected to the drive unit 3 through the spindles 4 and 5 as shown in FIG. However, the drive device 3 drives the spindles 4 and 5. FIG. 4 shows a state in which this is switched to a 5-stage roll. In the 5-stage roll, one work roll is driven, and the work roll 6 on the drive side is driven by the drive unit 8 via the spindle coupling 7 as in the 4-stage roll operating state.
The work roll 9 having a small diameter and a different diameter is driven by the work roll 6 having a large diameter through the rolled material. Further, an intermediate roll 10 is provided as a non-driving side roll, and the intermediate roll 10 is subordinately rotated by a work roll 9 having a different diameter.
The non-drive side spindle 12 that does not drive the work roll is a spindle support device 11 attached to the shaft end of the intermediate roll 10.
It is connected and supported by.

The structure of the spindle support device 11 is shown in FIGS. 1 and 2. The spindle support device 11 has a cap-shaped outer shell 13 that constitutes the spindle support main body, bearings 14 and 15 are installed on the inner circumference 13a of the outer shell 13, and the outer shell 13 passes through these bearings 14 and 15. Intermediate roll or non-driving side roll 1
It is rotatably attached to the 0 axis end. In addition, a collar 1 is placed between the bearings 14 and 15 and at the outer ends of the bearings 14 and 15.
6, 17 and end plates 18, 19 are installed to restrain movement of the outer shell 13 in the axial direction with respect to the axial end of the non-driving side roll 10. On the other hand, a connecting portion 13b that can be inserted into the non-driving side spindle 12 is provided at the shaft end on the side opposite to the roll of the outer shell 13, and the connecting portion 13a has an oval outer surface shape as shown in cross section in FIG. The two are connected by fitting with the corresponding recess 12a of the spindle 12.

In this embodiment having such a configuration, the intermediate roll 10 is prepared in advance as a roll assembly in which the spindle support device 11 is attached to the shaft end of the intermediate roll 10 prior to the switching of the rolling mill from the 4th stage to the 5th stage. Has been done. When changing the rolls from the 4th stage to the 5th stage, the intermediate roll 10 is mounted in the form of the roll assembly, and the outer shell 13 is connected in the same manner as when the shaft end of the drive side work roll 6 is connected to the spindle 7. Connection part 13
The spindle support device 11 is connected to the non-driving side spindle 12 by inserting b into the coupling recess 12a of the non-driving side spindle 12. At this time, the outer shell 13 has collars 16, 17,
The end plates 18 and 19 and the bearings 14 and 15 constrain the movement of the non-driving side roll 10 in the axial direction with respect to the shaft end, so that the outer shell 13 rolls when the connecting portion 13a is inserted into the spindle recess 12a. There is no risk of slipping out from the shaft end of 10.

After the spindle support device 11 and the non-driving side spindle 12 are connected, the state shown in FIGS. 1 and 4 is obtained, and the outer shell 13 is rotatable by the bearings 14 and 15 with respect to the shaft end of the non-driving side roll 10. Become involved. Therefore, the spindle 12 is supported and rotated by the spindle support device 11 without transmitting power to the non-driving side roll 10, and the non-driving side roll can also freely rotate without receiving power transmission from the spindle 12. .

When switching the rolling mill from the 5th stage to the 4th stage, the shaft end of the drive side work roll 6 is moved to the spindle 7 by the procedure reverse to the above.
The spindle support device 11 attached to the shaft end of the intermediate roll 10 can be detached from the spindle 12 in the same manner as the detachment from the spindle 12. Also at this time, the outer shell 13 has the collars 16,1
7, by the end plates 18,19 and bearings 14,15,
The movement of the non-driving side roll 10 in the axial direction with respect to the shaft end is restricted, and the outer shell 13 does not fall off the shaft end of the roll 10.

As described above, according to this embodiment, when the rolls are changed from the 4th stage to the 5th stage or from the 5th stage to the 4th stage, the rolls can be changed without attaching and detaching the non-driving side spindle 12. It becomes possible to carry out the roll change as easily as the roll change in the above.

Another embodiment of the present invention will be described with reference to FIGS. The spindle support device 1 of the first embodiment is configured to support the spindle 12 so that the shaft center of the non-driving roll 10 is aligned with that of the non-drive roll 10. As a result, the shaft center of the intermediate roll 10 on the non-driving side is deviated from the shaft center of the spindle 5 at the time of four-stage roll shown in FIG. 4, so that the spindle 12 supported by the spindle support device 11 is It is supported with an inclination as shown in the figure. It is a problem that this inclination is too large due to the strength of the spindle. This embodiment solves this problem. As shown in FIG. 5, the spindle support device 20 supports the spindle 21 so that the spindle 21 is displaced from the shaft center of the non-drive side roll 22. It is constructed integrally with the bearing box 23 of 22.

The structures of the spindle support device 20 and the bearing box 23 are shown in FIG. The bearing box 23 is configured to rotatably support the shaft end of the non-driving side roll 22 by means of a bearing 24, similarly to a normal roll shaft box. Spindle support device 20
Has a spindle support main body 25 having a connecting portion 25a which can be inserted into the non-driving side spindle 21 (Fig. 5) at one end, and the other end of the spindle support main body 25 is attached to the housing 27 of the bearing housing 23 by the bearing 26. It is rotatably supported. Therefore, the spindle support body 25 and the non-driving side roll 22 can rotate independently of each other. Also bearing 26
The shaft center of the spindle support device 20 is displaced from the shaft center of the bearing 24 as shown in the drawing.
As shown in the figure, it is arranged in the vicinity of the support position of the spindle during four-stage roll.

According to the present embodiment, the inclination of the spindle does not become large, so that the existing spindle can be supported comfortably in terms of strength.

Still another embodiment of the present invention will be described with reference to FIG. In this embodiment, in the spindle support device of the bearing box integrated type, which is arranged offset from the shaft center of the non-drive side intermediate roll and the shaft center of the spindle support device, the spindle support body and the intermediate roll are connected by a gear via a clutch. By doing so, it is possible to realize a work roll drive when the rolled material is caught. That is, the spindle support device 30 is formed integrally with the bearing box 31, and the bearing box 31 rotatably supports the intermediate roll 33 of the five-stage roll by the bearing 32. The spindle support device 30 has a spindle support main body 36 that is attached to a housing 34 of a bearing box 31 with its axis displaced from the intermediate roll 31, and is rotatably supported by a bearing 35. Is provided with a connecting portion 36a for the non-driving side spindle. The shaft end of the intermediate roll 33 and the spindle support body 36 are provided with gears 37 and 38 that mesh with each other,
The gear 37 on the shaft end of the intermediate roll 33 is rotatably supported on the shaft end of the intermediate roll 33, and the gear 37 is selectively attached to the shaft end of the intermediate roll 33 via a clutch mechanism including clutch plates 39, 40. Be connected. A hydraulic cylinder 41 that operates a clutch mechanism is provided at an end of the gear 37 opposite to the clutch.

In the present embodiment configured as described above, the spindle support body 36 rotates at the same speed as the non-driving side spindle (not shown), and the rotational force is transmitted to the clutch mechanisms 39, 40 via the gears 37, 38. . In this clutch mechanism, normally, the spindle-side clutch plate 40 is not in contact with the intermediate roll-side clutch plate 39, and power is not transmitted between the spindle and the intermediate roll 33. When biting the rolled material and driving the work roll, the clutch plates 39 and 40 are connected by the hydraulic cylinder 41. As a result, the power from the spindle is transmitted to the intermediate roll 33, and is normally transmitted to the non-driven small-diameter work roll 42.

The rotation direction of the small-diameter work roll 42 becomes the same as the rotation direction of the non-driving side spindle (not shown) by adopting the structure of FIG. 7, and the rotation of the spindle at the time of four-stage roll despite the intermediate roll drive. The rotation direction can be adjusted to the large diameter work roll without changing the direction.

After the engagement, the clutch mechanisms 39, 40 are released from the connection, and the single work of the large diameter work roll is performed.

According to the present embodiment, it is possible to drive the non-driving side small-diameter roll when the rolled material is caught while using the existing equipment and keeping the roll opening at an arbitrary position.

Still another embodiment of the present invention will be described with reference to FIGS. 8 and 9. In this embodiment, the non-drive side spindle is separated from the non-drive side roll and supported. That is, in the state where the roll is switched to the five-stage roll, the non-driving side intermediate roll 50 is rotatably supported by a bearing box 51 as usual, and is rotated via a lower work roll and a rolling material roll 52 not shown. The non-driving side spindle 53 is rotatably supported by a spindle support device 54 which is separate from the bearing box 51. The spindle support device 54 is rotatably attached to a frame 55 provided near the work roll 52 and the frame 55,
A pair of rollers that form a rolling member that is driven to rotate when the non-driving side spindle 53 is placed and that rotatably supports this.
It consists of 56.

In the present embodiment as well, similar to the above-described embodiment, switching from the 4-high roll to the 5-high roll is as easy as changing the 4-high rolling without substantially changing the equipment of the existing 4-high rolling mill. It can be realized by

〔The invention's effect〕

According to the present invention, when changing the roll from the 4-high roll to the 5-high roll, it is not necessary to remove the spindle on the non-driving side, and the roll can be changed with the same time and labor as the roll change in the normal 4-high rolling mill. It can be rearranged and the efficiency can be greatly improved, and it is possible to increase the productivity of multiple products on the same rolling mill.

Further, according to the present invention, since the spindle support axial center position can be brought close to the axial center position at the time of work roll drive in the four-stage roll, by making the roll diameter of any combination possible, the burden on the spindle can be reduced. Since the spindle can be supported without increasing the number, it is not necessary to increase the strength of the spindle, and it is possible to realize a rolling mill that can safely switch between 4 and 5 stages with existing equipment.

Further, according to the present invention, the work roll drive at the time of biting the rolled material can be realized with the existing equipment, and the roll gap can be arbitrarily set. Therefore, the work roll drive can be easily performed with excellent economical efficiency and controllability. realizable.

[Brief description of drawings]

1 is a sectional view of a spindle support device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a four-step view of the present embodiment. FIG. 4 is a schematic diagram showing a connection state with a spindle in a roll, and FIG. 4 is a schematic diagram showing a connection state with a spindle in a five-stage roll in the present embodiment using the spindle support device shown in FIG. 1. FIG. 5 is a schematic view showing a connection state with a spindle in a 5-stage roll when a spindle support device according to another embodiment of the present invention is used, and FIG. 6 is a spindle support device of the same embodiment. FIG. 7 is an enlarged sectional view of FIG.
FIG. 8 is a sectional view of a spindle support device according to another embodiment of the present invention, and FIG. 8 is a view showing a spindle support device according to still another embodiment of the present invention and a relationship between the device and a roll end portion. 9 is a sectional view taken along the line IX-IX in FIG. Explanation of symbols 10; 22; 33; 50 ... Intermediate roll (non-driving side roll) 11; 20; 30; 54 ... Spindle support device 12; 21 ... Non-driving side spindle 13 ... Outer shell (spindle support body) 13b; 25a ; 36a ... Connecting part 14,15; 26; 35 ... Bearing 25; 36 ... Spindle support body 37,28 ... Gear 39,40 ... Clutch plate 56 ... Roller (spindle support body)

Claims (7)

[Claims] 1. A four-stage roll for connecting two work rolls to each of two spindles and driving the two work rolls for rolling, and one work roll for the two rolls.
One of the two spindles is connected to drive one work roll, and the other one work roll is not connected to the other one of the two spindles. A rolling mill capable of switching to a 5-high roll for supporting and rolling, and having a spindle support device for rotatably supporting another spindle that does not drive the work roll when rolling with a 5-high roll. , The spindle support device,
And a bearing device that rotatably connects the spindle support body to the shaft end of the intermediate roll. A rolling mill that can switch between 4 and 5 stages. 2. The bearing device of the spindle support device is provided between an inner circumference of the spindle support body and an outer circumference of a shaft end of the intermediate roll, and the shaft end of the intermediate roll is attached to the spindle support body. The bearing according to claim 1, further comprising a bearing rotatably connected to the bearing.
Rolling mill that can switch between 5 steps. 3. The bearing device of the spindle support device is provided between an inner circumference of a bearing box of the intermediate roll and an outer circumference of the spindle support body, and the spindle support body is rotatably connected to the bearing box. The four-stage and five-stage switchable rolling mill according to claim 1, wherein the spindle support main body and the intermediate roll are arranged with their axes displaced from each other. 4. The four-stage according to claim 1, wherein the spindle support device further comprises a power transmission mechanism with a clutch for selectively transmitting the power of the spindle to the shaft end of the intermediate roll. A rolling mill that can switch between 5 stages. 5. A roll assembly comprising an intermediate roll according to claim 1 and a spindle support device according to claim 1 provided at an axial end of the intermediate roll. 6. A four-stage roll for connecting two work rolls to each of two spindles and driving the two work rolls for rolling, and one work roll for the two rolls.
One of the two spindles is connected to drive one work roll, and the other one work roll is not connected to the other one of the two spindles. A rolling mill capable of switching to a 5-high roll for supporting and rolling, and having a spindle support device for rotatably supporting another spindle that does not drive the work roll when rolling with a 5-high roll. , The spindle support device,
A frame positioned adjacent to the two work rolls, and a rolling member rotatably attached to the frame and rotatably driven when the other one spindle is placed to rotatably support the same. A rolling mill capable of switching between 4 and 5 stages. 7. A four-stage roll for connecting two work rolls to each of two spindles, and driving the two work rolls for rolling, and one work roll for the two rolls.
One of the two spindles is connected to drive one work roll, and the other one work roll is not connected to the other one of the two spindles. In a method of operating a rolling mill capable of switching to a 5-high roll for supporting and rolling, when rolling with a 5-high roll, another spindle that does not drive the work roll is rotated to the shaft end of the intermediate roll. A spindle support device that freely supports is provided, and a power transmission mechanism with a clutch that selectively transmits the power of the other spindle to the shaft end of the intermediate roll is provided in the spindle support device, and rolling is performed with five-stage rolls. At the same time, the other one spindle that does not drive the work roll is rotatably supported by the spindle support device on the shaft end of the intermediate roll, and the rolled material is caught. At the time, the clutch is connected and driven by the two rolls of the one work roll and the intermediate roll. After the biting, the clutch is disengaged and driven by the one work roll. A method of operating a rolling mill capable of switching between four and five stages, which is characterized in that