JPH06292911A - Thrust ring device for roll of rolling mill and chock attaching/detaching device provided with attaching/ detaching device therefor - Google Patents

Abstract

PURPOSE:To prolong the since life of a bearing by connecting a wedge to a operating mechanism and enabling to striking the end face of a thrust block against the side wall in the radial direction of a roll neck groove when a ring is pressurized. CONSTITUTION:A thrust ring device 5 is composed of the ring 5a which is provided around a roll 1 and plural thrust blocks 5b which are made to be movable in the radial direction to the roll 1 in the ring 5a and are possible to drop into a roll neck groove 1a which is provided on the roll 1. The wedge 6 with which the ring 5a is pushed in the direction that the ring is separated from a carrier ring 4 by wedge engagement is provided between the carrier ring 4 and the ring 5a so as to be movable toward the radial direction of the roll 1. The wedge 6 is connected to the operating mechanism which is operable from the outside and the end face in the axial direction of the thrust block 5b is enabled striking against the side wall in the radial direction of the roll neck groove 1a when the ring 5a is pressurized. In this way, this device is optimally assembled with various kinds of rolls.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust ring device for receiving an axial load on a roller bearing of a rolling mill and a device for attaching and detaching the thrust ring device and a chock.

[0002]

2. Description of the Related Art A rolling support structure for a roll of a rolling mill supports a roll by means of a roll shaft box having a bearing and an annular carrier ring, as described in Japanese Utility Model Publication No. 60-25284. Generally, a thrust ring for restraining the axial direction of the carrier ring 4 and integrating the roll shaft box with the roll is provided.

Thrust rings are indispensable for incorporating a high-speed rotating rolling roll into a mill, but the frequency of roll replacement is high because of the cutting correction of the surface of the rolling roll. Therefore, as described in the above publication, a plurality of thrust blocks are provided so as to be movable in the radial direction of the roll along the thrust ring, and these thrust blocks are recessed in the circumferential surface of the roll by lever operation. It is used by dropping it into the neck groove so that it can be integrated with the roll and easily attaching and detaching the thrust ring.

Further, utilizing the fact that the thrust ring can be attached and detached by operating the lever as described above, there is also a facility that allows not only the attachment and detachment of the thrust ring but also the roll chock to be replaced, as disclosed in Japanese Examined Patent Publication No. 60-63523. It is described in the official gazette. This equipment is provided with a thrust ring attachment / detachment device that can externally operate a lever for attaching / detaching a thrust ring, and a chock attachment / detachment device that can carry in and carry out a chock in conjunction with this.

[0005]

However, in any of the thrust rings described in the above publications, there is an axial gap between the thrust block and the neck groove of the roll. This is intended to eliminate interference between the thrust block and the neck groove in preparation for automatic attachment / detachment of the thrust ring.

Such a gap in the axial direction allows the roll to move in the thrust direction, though slightly. Therefore, the load fluctuation in the thrust direction of the drive system and the bearing also becomes large, and the life of the drive system and the bearing is inevitably shortened. And, especially on the drive side of the roll for hot rolling or the roll for shaped steel with high load,
It is not preferable to apply such thrust ring having play in the axial direction.

Although a device for attaching and detaching the roll chock at the same time as the thrust ring is used, it is impossible to incorporate the thrust ring without the play in the axial direction as described above. For this reason, in a rolling roll that has no play in the axial direction of the thrust ring or requires a correct gap, an additional work is required to eliminate this play. For example, a lock nut for restraining the axial position of the thrust ring is provided, and work such as manually tightening the lock nut is performed.

As described above, although the thrust ring can be easily attached and detached by applying the thrust block, since the thrust block has a gap in the axial direction with respect to the roll, it has a bad influence on the drive system or does not completely operate. There is a problem that it is not possible to achieve high automation.

The problem to be solved in the present invention is to provide a device which can hold the thrust ring without play in the axial direction to improve the life thereof and can automate all operations including the roll chock.

[0010]

According to the present invention, there is provided a carrier ring having one end face abutting against a bearing in a chock and arranged around a roll, and a thrust ring device arranged so as to abut against the other end face of the carrier ring. A ring provided with the thrust ring device around the roll, and a plurality of thrust blocks movable in the ring in the radial direction with respect to the roll and capable of being dropped into a roll neck groove provided in the roll. And a wedge that pushes the ring away from the carrier ring by wedge engagement is provided between the opposing surfaces of the carrier ring and the ring so as to be movable in the radial direction of the roll. When the wedge is connected to an operating mechanism that can be operated from the outside and the ring is pressed, the axial direction of the thrust block Characterized by comprising an end face as possible abutted against the radial direction of the side wall of the roll neck groove.

For a roll of a rolling mill equipped with such a thrust ring device, a chock attaching / detaching device is a roll cradle for supporting the body of the roll, and a chock attaching / detaching truck for attaching / detaching the chock to / from the roll. And a thrust ring attachment / detachment device for attaching / detaching the thrust ring device to / from the roll, the thrust ring attachment / detachment device comprising:
It is provided with a traveling carriage that is movable from the end of the roll in the axial direction thereof, and a detachable head that is provided on the traveling carriage and that simultaneously moves the thrust block and the wedge in opposite directions with respect to the roll. be able to.

[0012]

[Function] When the wedge is moved by an external operation,
The wedge engagement pushes the ring axially. Therefore, the thrust block included in the ring can be abutted against the wall of the axial end surface of the roll neck groove, and assembling with an appropriate gap provided between the thrust ring and the roll becomes possible. .

Further, if the wedge and the thrust block are moved in opposite directions with respect to the roll,
The pressing of the thrust block against the wedge and the pulling out from the roll neck groove can be linked with each other, and automation by the attaching / detaching device becomes possible.

[0014]

1 is a longitudinal sectional view of an essential part of a thrust ring device of the present invention, and FIG. 2 is an axial view showing the arrangement of thrust blocks.

In the figure, a chock 2 that supports a roll 1 and is connected to a rolling system of a mill is provided with a bearing 3 as in the conventional case.
Is incorporated, and the chock cover 2a that wraps around the end of the roll 1 is integrated.

Around the roll 1, there is arranged a carrier ring 4 that abuts against the outer end surface of the bearing 3, and thrust rings 5 that hold the bearing 3 by restricting the axial position of the carrier ring 4 are incorporated. Be done.

The thrust ring device 5 has an annular ring 5a having an inner diameter slightly larger than the outer diameters of both ends of the roll 1 and a roll connected to the ring 5a, as described in the section of the prior art. And a plurality of thrust blocks 5b movable in the radial direction.

The thrust block 5b is slidable in the ring 5a in the radial direction and is connected to the tip of an operating lever 5c pivotally attached to the ring 5a. Also,
The ring 5a is provided with a spring 5d that biases the thrust block 5b toward the peripheral surface of the roll 1. The lever 5c is biased by the spring 5d as shown in FIG. 1, whereby the thrust block 5b falls into the roll neck groove 1a provided at the end of the roll 1, and the thrust block 5b is stably held by the biasing force of the spring 5d. To be done.

The carrier ring 4 is arranged so that its two end faces abut on the bearing 3 and the ring 5a, respectively. Further, in the conventional example, while there is play in the axial direction between the roll neck groove 1a and the thrust block 5b dropped therein, the wedge 6 for incorporating this gap is incorporated into the carrier ring 4.

The wedge 6 is integrally provided with a rod 6a penetrating the carrier ring 4 in the radial direction.
A vertically swingable handle 6b is connected to the tip of the. The rod 6a is biased by a spring 6c incorporated in the carrier ring 4 in a direction away from the peripheral surface of the roll 1. With such a configuration, it is possible to overcome the centrifugal force and stably lock even during operation of the mill.

The surface of the wedge 6 facing the ring 5a is provided with a tapered surface 6e which is inclined toward the bearing 3 from the lower end toward the upper end. The end surface of the ring 5a has the tapered surface 6e.
The pressure receiving surface 5e has the same inclination angle as the above, and these taper surface 6e and the pressure receiving surface 5e can be taper-engaged with each other.

Here, in the state shown in FIG. 1, the wedge 6 is in the position farthest from the peripheral surface of the roll 1 and abuts on the inner wall of the carrier ring 4. At this time, the tapered surface 6
The taper engagement between e and the pressure receiving surface 5e causes the ring 5a to be pushed to the right in the figure. Therefore, the thrust block 5b can be abutted against the end side wall of the roll 1 in the roll neck groove 1a.

FIG. 3 is a diagram when the thrust is released.

In this releasing operation, first, the handle 6b is pushed down to move the wedge 6 to the peripheral surface side of the roll 1, and the engagement between the tapered surface 6e and the pressure receiving surface 5e is released. This allows
The action force that pushes the ring 5a to the right is loosened, and the thrust block 5b can be removed from the roll neck groove 1a.

Next, when the lever 5c is pushed down in FIG. 1, the thrust block 5b moves in a direction away from the roll 1. Then, as shown in FIG. 3, when the end surface of the thrust block 5b is located away from the outer peripheral surface of the roll 1, there is no interference between the thrust block 5b and the roll 1, and the roll 1 and the thrust block 5b together with the ring. 5a can be removed.

When the thrust ring device 5 is mounted, contrary to the above operation, the thrust block 6 is released by the spring 5d by loosening the pressing of the lever 5c.
b is dropped into the roll neck groove 1a, and then the handle 6b is loosened to pull up the wedge 6 by the spring 6c. As a result, the thrust block 5b hits the side wall in the roll neck groove 1a,
An axially play-free assembled structure is obtained.

FIG. 4 is a vertical cross-sectional view of the main part showing another embodiment, which is an example in which the thrust block 5a can be attached and detached by a single lever operation. The same members as those in the previous example are designated by common reference numerals, and detailed description thereof will be omitted.

In the figure, a lever 7 for operating the thrust block 5b is pivotally attached to the ring 5a so as to be vertically swingable, and its tip is connected to the thrust block 5b. The lever 7 has a rod 7 extending over the thrust block 5b and extending toward the carrier ring 4 side.
One end of a is connected, and a pressing block 7b whose surface facing the roll 1 is tapered is provided at the tip of the rod 7a.

A wedge block 8b having a tapered surface is provided at the tip of the rod 8a of the wedge 8 incorporated in the carrier ring 4, and the wedge block 8b is urged by the spring 8c in the direction away from the roll 1. The taper surfaces of the wedge block 8b and the pressing block 7b of the rod 7a are at positions facing each other, and the wedge 8 can be pushed to the roll 1 side by the movement of the rod 7a.

In the illustrated state, the thrust block 5b falls into the roll neck groove 1a, at which time the rod 7
a has moved to the carrier ring 4 side by the maximum amount. At this time, due to the engagement between the wedge block 8b and the pressing block 7b, the wedge 8 is moved by the spring 8c in a direction away from the roll 1 side, and the tapered surface 8d abuts on the pressure receiving surface 5e of the ring 5a, thereby drawing the ring 5a. Press to the right at. Therefore, the end surface of the thrust block 5b hits the side wall of the roll neck groove 1a, and an assembled structure having no play in the axial direction is obtained.

When the lever 7 is pushed down from the state shown in the figure, the rod 7a moves to the right side, and the wedge 8 is formed by the tapered surface engagement between the pressing block 7b and the wedge block 8b.
Is pushed to the roll 1 side. Therefore, the tapered surface 9b comes to separate from the pressure receiving surface 5e, and the thrust block 5
Release the load on b. At the same time, the thrust block 5b comes out of the roll neck groove 1a by the rotation of the lever 7, and the thrust block 5b can be moved to the outside of the peripheral surface of the roll 1 as in the previous example. The ring device 5 can be set to be pulled out from the roll 1.

As described above, by independently operating the lever 7, the thrust block 5b can be attached to and detached from the roll neck groove 1a, and the operation is simplified as compared with the previous example.

FIG. 5 is a vertical cross-sectional view of a main part showing still another embodiment, which is an example in which the operation of the wedge is operated by a hydraulic cylinder.

The thrust block 5b is connected to the lever 9 as in the previous example, and the vertical movement of the lever 9 enables the thrust block 5b to be attached to and detached from the roll neck groove 1a.

On the other hand, an auxiliary block 10 is incorporated between the carrier ring 4 and the ring 5a, and a wedge 11 is provided on the auxiliary block 10. This wedge 11 has its tapered surface 11a capable of abutting against the pressure receiving surface 5e of the ring 5a, as in the previous example.

The auxiliary block 10 has a cylinder bore 10a.
Is provided, and the wedge 11 is connected to the piston rod 10b that operates by supplying and discharging hydraulic oil. Then, by moving the piston rod 10b to the side toward the roll 1 and the side away from the roll 1 according to the supply direction of the hydraulic oil, the wedge 1
The positional relationship between the first tapered surface 11a and the pressure receiving surface 5e of the ring 5a can be changed. Therefore, if the supply and discharge of hydraulic oil is appropriately controlled so as to be linked to the operation of the lever 9,
The operation of attaching and detaching the thrust ring device 5 can be performed by a light operation.

FIG. 6 is a front view of an example including a device for attaching and detaching the thrust ring 5, and FIG. 7 is a right side view of FIG.

In the figure, a roll cradle 12 for receiving the assembly of the roll 1 removed from the rolling mill
, And a chock attachment / detachment vehicle 13 on which the chock 2 can be mounted is arranged on the left and right.

The roll receiving base 12 includes two receiving rollers 12a for supporting the body of the roll 1 on the cylinder 12b.
It is provided so that it can be moved up and down.

The chock attachment / detachment truck 13 is capable of traveling in a posture parallel to the axis of the roll 1, and has a chock receiver 13a and a chock cover receiver 13b on the upper surface thereof which can be lifted and lowered by a cylinder device. The chock cover receiver 13b is also provided with a thrust ring receiver 13c for supporting the thrust ring device 5 so as to be vertically movable.

Further, a thrust ring attaching / detaching device 14 for attaching / detaching the thrust ring device 5 to / from the roll 1 is provided. The thrust ring attachment / detachment device 14 has a gate-shaped frame 14a mounted on a traveling carriage 14b as shown in FIG. 6, and can travel independently of the chock attachment / detachment carriage 13. The thrust link attachment / detachment device 14 may be mounted on the chock attachment / detachment vehicle 13 or may be independently installed on the work side and the drive side.

The frame 14a has a movable frame 14e which is vertically moved by an electric motor 14c and a chain 14d.
To provide. The movable frame 14e is provided with an annular base 14f rotatable by a drive device (not shown), and the base 14 is provided with a detachable head 15 for attaching and detaching the thrust ring device 5.

The attaching / detaching head 15 has a function of simultaneously pushing the lever 5c and the handle 6b to the roller 1 side in contrast to the structure of the thrust ring device 5 of the type described with reference to FIG.

FIG. 8 is a schematic view of the essential parts showing the relationship between the detachable head 15 and the thrust ring device 5.

The attaching / detaching head 15 is provided with a cylinder 15a having a stroke in the axial direction of the roll 1, and a push block 15c is provided at the tip of a rod 15b thereof. The push block 15c is the thrust block 5b.
At the same time as pushing down the lever 5c, the handle 6b of the wedge 6 can be pressed down by the pusher 15e provided with the spring 15d at one end, and these can be gripped.

Further, FIG. 9 is a schematic view showing the operation of the chock attachment / detachment vehicle 13 and the thrust ring attachment / detachment device 14.

The chock receiver 13a can be lifted and lowered by the cylinder 13-1, and the chock receiver 13a is raised after stopping the chock attachment / detachment carriage 13 at a predetermined position.
It can receive the bottom of the chock 2 and support it.

Further, in the thrust ring attaching / detaching device 14, the traveling carriage 14b equipped with the annular base 14f is the roll 1.
Is movable in the axial direction, and the detachable head 15 can be set so as to be located around the thrust ring device 5.

FIG. 10 is a schematic view showing the operation of the chock cover receiver 13b.

The chock cover receiver 13b is a shift cylinder 13b-1 for moving the roll 1 in the axial direction.
And is supported by a lifter cylinder 13b-2 for moving up and down. The chock cover receiver 13b is the thrust ring attaching / detaching device 1
It operates independently of 4, and the work of attaching and detaching the chock 2a can be performed.

In the above structure, the thrust ring device 5 and the chock 2 are removed from the roll 1 by the following steps.

First, the chock attachment / detachment vehicle 13 and the thrust ring attachment / detachment device 14 are made to stand by with respect to the roll cradle 12 at a position where they do not interfere with the roll 1, and the body of the roll 1 is placed on the roll cradle as shown in FIG. Place on top of 12. Then, as shown in the figure, the chock attachment / detachment truck 13 is stopped at a predetermined position.

After that, the chock receiver 13a and the chock cover receiver 13b are raised to mount only the chock cover 2a on the chock cover receiver 13b. Chock 2
Since the chock cover 2a and the chock cover 2a are integrated by a clamp device as in the conventional case, the clamp device is released to release the connection between the two.

Then, the chock cover receiver 13b is pulled out to the outside, and the chock cover 2a is pulled out from the roll 1 and separated. Then, the thrust ring attachment / detachment device 14 at the standby position is moved by the traveling carriage 14b, and the base 14f is lowered to align with the core of the roll 1. After this centering, the base 14f is advanced to a position where the end of the roll 1 is inserted, and the detachable head 15 and the lever 7 are inserted.
Align the position of. In addition, this alignment is based on the base 14
The rotation of f and the movement amount of the traveling carriage 14b are adjusted.

After the thrust ring attachment / detachment device 14 is aligned, the thrust block 5b is rolled as described with reference to FIG. 4 by holding the thrust ring device 5 which simultaneously tilts each lever 7 toward the roll 1 by the attachment / detachment head 15. It can be pulled out from the neck groove 1a.

After removing the thrust block 5b, the thrust ring attachment / detachment device 14 is returned to the outside standby position, and the chock 2 supported by the chock receiver 13a is carried out by the chock attachment / detachment truck 13. In the process of carrying out the chock 2, the thrust ring attaching / detaching device 1
The movable frame 14e is lifted by the operation of the movable frame 14e to avoid interference with the chock 2, and is pulled out from the roll 1 in parallel with the chock 2 by the traveling carriage 14b.

Also, the chock 2 and the thrust ring device 5
The work of mounting the roll 1 on the roll 1 may be performed in the reverse order of the above removal.

Thus, the chock 2 and the thrust ring device 5 can all be mechanically pulled out from the roll 1, and the work efficiency and safety can be improved.

The chock 2 and the thrust ring device 5 can be attached and detached without separating the chock cover 2a from the chock 2, an example of which is shown in FIG.

In this example, as in the case shown in FIG. 6 and FIG.
a and a chock cover receiver 13b, and one detachable head 16 is provided on the end surface of the chock cover receiver 13b. The detachable head 16 is similar to the previous example.
It has the function of shifting the lever 7 up and down.

On the other hand, an opening 2b is opened in the peripheral surface of the chock cover 2a, and the detachable head 1 is passed through this opening 2b.
6 can be engaged with the lever 7.

The work in this example is similar to the case of FIG.
The roll 1 is supported by the roll receiving base 12, the chock attachment / detachment carriage 13 is set under the roll 1, and the chock 2 and the chock cover 2a are supported by the chock receiver 13a and the chock cover receiver 13b, respectively.

Next, the roll 1 is rotated by using the roll cradle 12 so that the lever 7 of each thrust block 5b is set to the corresponding position of the detachable head 16.
When the work of pushing down the lever 7 of one thrust block is completed, the work of releasing the attaching / detaching head 16 from the opening 2b to the outside and rotating the roll 1 corresponding to the next lever 7 is proceeded.

When the release of the six thrust blocks 5b is completed, the chock 2 and the chock cover 2a can be removed from the roll 1 by running the chock attachment / detachment truck 13 while the thrust ring device 5 is housed.

The chock 2, the chock cover 2a, and the thrust ring device 5 may be mounted on the roll 1 in the reverse order of the above removal.

[0066]

According to the present invention, since an axial gap can be set appropriately between the thrust block and the roll to provide an assembled structure, there is no axial load fluctuation on the drive system and the bearing, and The life of the bearing is improved. For this reason, it can be optimally incorporated into various rolls including a roll for hot rolling and a roll for shaped steel with a high load.

Further, since the gap between the thrust block and the thrust block can be adjusted, the thrust block can be easily pulled out by loosening this gap at the time of attachment / detachment work, and automatic work by the attachment / detachment device can be achieved, resulting in work efficiency. Also improves.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a detachable structure of a thrust ring device.

FIG. 2 is a partial view showing the arrangement of thrust blocks, and is an external view of FIG. 1 viewed from the right side.

FIG. 3 is a longitudinal sectional view showing a main part when the thrust block of FIG. 1 is taken out of a roll.

FIG. 4 is a vertical cross-sectional view of a main part showing an example in which a thrust block can be attached and detached with one lever.

FIG. 5 is a vertical cross-sectional view of a main part showing an example in which a wedge can be operated by hydraulic pressure.

FIG. 6 is a front view showing equipment for attaching / detaching a chock and attaching / detaching a thrust ring device.

FIG. 7 is a right side view of FIG.

FIG. 8 is a diagram showing a main part of a mounting / demounting head, a thrust block, and a wedge of the thrust ring mounting / demounting device.

FIG. 9 is a schematic view showing the operation of the chock attachment / detachment truck and the thrust ring attachment / detachment device.

FIG. 10 is a schematic view showing the operation of a chock cover receiver provided in the chock attachment / detachment cart.

FIG. 11 is a view showing an attaching / detaching device for attaching / detaching a thrust ring with a chock cover attached.

[Explanation of symbols]

1 Roll 6 Wedge 1a Roll Neck Groove 6e Tapered Surface 2 Chock 7 Lever 2a Chock Cover 8 Wedge 3 Bearing 8d Tapered Surface 4 Carrier Ring 9 Lever 5 Thrust Ring Device 10 Auxiliary Block 5a Ring 11 Wedge 5b Thrust Block 12 Roll Cradle 5c Lever 13 Chock attachment / detachment truck 5d Spring 14 Thrust ring attachment / detachment device 5e Pressure receiving surface 15 Attachment / detachment head 16 Attachment / detachment head

Claims (2)

[Claims] 1. A thrust ring device comprising: a carrier ring having one end face abutting against a bearing in a chock and arranged around the roll; and a thrust ring device arranged so as to abut the other end face of the carrier ring. A ring provided around the roll, and a plurality of thrust blocks that can be moved in the ring in a radial direction with respect to the roll and can be dropped into a roll neck groove provided in the roll, and further the carrier ring A wedge that pushes the ring in a direction away from the carrier ring by a wedge engagement is provided between the facing surfaces of the ring and the ring so as to be movable in the radial direction of the roll, and the wedge can be operated from the outside. When the ring is pressed while being connected to the mechanism, the axial end surface of the thrust block is attached to the roll neck groove. Thrust ring device in a rolling mill that can be abutted against the radial side wall of the rolling mill. 2. A roll cradle for supporting a body of a roll, a chock attachment / detachment truck for attaching / detaching a chock to / from the roll, and a thrust ring attachment / detachment device for attaching / detaching a thrust ring device to / from the roll, Further claim 1
In a facility provided with a thrust ring device according to claim 1, the thrust ring attachment / detachment device includes a traveling carriage that is movable in the axial direction from an end of the roll, and a thrust block and a wedge provided on the traveling carriage. At the same time, a chock attaching / detaching device provided with an attaching / detaching facility of a thrust ring device provided with an attaching / detaching head for moving the rolls in mutually opposite directions.