JP2966230B2 - Roll thrust ring and its mounting structure in rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, about the thrust ring and its mounting structure receiving the load in the axial direction of the roll bearing in the rolling machine.

[0002]

2. Description of the Related Art FIG. 14 is a longitudinal sectional view showing a conventional example of a thrust ring mounting structure.

[0003] In Figure, the axial direction of the carrier ring 53 with a bearing 52 interposed, is abutted the carrier ring 53 to the bearing 52 located at the end between the chocks 51 for holding around the end of the roll 50 Is fitted in a roll neck groove 50a provided by recessing the roll 50. And lock nut 5
5 locks the carrier ring 53, and the lock nut 55 is prevented from loosening by a lock nut fixing bolt 56. At this time, the lock nut 55 is tightened once operated on so that loosening to provide the proper spacing after this.

[0004] Instead of such a structure, as a structure for supporting the rotation of a roll of a rolling mill, for example, Japanese Utility Model Publication No. 60-25 / 1985.
As described in Japanese Patent Publication No. 284, the roll is supported by a roll axle box containing a bearing and an annular carrier ring, and the roll ring box is integrated with the roll by restraining the axial direction of the carrier ring 53. Is generally provided.

[0005] Thrust rings are indispensable for assembling rolling mills rotating at a high speed into a mill, but the frequency of replacing the rolls is high due to cutting correction of the surface of the rolling rolls. For this reason, 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 depressed on the peripheral surface of the roll by lever operation. The thrust ring is dropped into the roll neck groove so as to be integrated with the roll, and the thrust ring is easily attached and detached.

[0006]

However, conventional thrust ring devices, including those described in the above-mentioned publications, generally have a structure in which an axial gap is provided between the thrust block and the neck groove of the roll. Has been adopted. this is,
An object is to eliminate interference between a thrust block and a neck groove in preparation for automatic attachment and detachment of a thrust ring.

[0007] Thus there is a gap in the axial direction, in the rolling mill drive side with a particularly high load, the load fluctuation of the drive unit and bearings applied, reduction in life is not unavoidable. In addition, on the driven side, it is necessary to provide an appropriate gap for mounting.

Most of the conventional equipment, as described with reference to FIG.
5, once tightened the carrier ring 53 and the thrust ring 54, then loosen the lock nut 55 to provide an appropriate clearance, and then lock the nut 56
The work of fastening is done manually.

Although the thrust block can be easily attached and detached by applying the thrust block, the thrust block has play in the axial direction with respect to the roll, so that the life is shortened and complete automation cannot be achieved. There is.

The problem to be solved in the present invention is to make it easy to set an appropriate play of the thrust ring in the axial direction and to reduce the burden of the work of attaching and detaching the thrust ring.

[0011]

SUMMARY OF THE INVENTION The present invention is directed to a thrust provided with a thrust block capable of applying a restraining force in an axial direction to a bearing in a chock for supporting a roll to be depressed in a roll neck groove cut in the roll. In the ring, a main body of the thrust ring is provided with a fluid cylinder device that performs a stroke operation toward a center side, and the thrust block is connected to the fluid cylinder device.

The thrust ring mounting structure includes a carrier ring disposed around the roll by abutting one end against a bearing in a chock, and a thrust ring for applying and transmitting an axial restraining force to the carrier ring. Body and
In a thrust ring including a plurality of thrust blocks movable in a radial direction with respect to the roll in the main body and capable of being dropped into a roll neck groove provided in the roll, an opposing surface between the carrier ring and the main body is provided. A wedge that pushes the main body away from the carrier ring by wedge engagement is provided so as to be movable in the radial direction of the roll, and the thrust block and the wedge are built in the main body and the carrier ring, respectively. The thrust block is connected to a fluid cylinder, and when the main body is pressed, an axial end face of the thrust block can be abutted against a radial side wall of the roll neck groove.

Further, the mounting structure includes a carrier ring arranged around the roll with one end face abutting against a bearing in the chock, and a thrust ring main body arranged around the roll connected to the carrier ring in the axial direction. A thrust ring comprising: a plurality of thrust blocks movable in a radial direction with respect to the roll in the main body and capable of being dropped into a roll neck groove provided in the roll;
The thrust block is connected to a fluid cylinder built in the main body, and an end face of the carrier ring and an end face of the thrust block can be brought into contact with each other by wedge engagement, and the thrust block can be brought into contact with the roll neck groove by the fluid cylinder. When the thrust block is advanced inward, the axial end face of the thrust block may be allowed to abut against a radial side wall of the roll neck groove by the wedge engagement.

The supply / discharge system of the hydraulic oil to / from the fluid cylinder can be configured to be detachable from the outside of the roll assembly.

[0015]

[0016]

By connecting a thrust block incorporated in the thrust ring to a fluid cylinder and connecting a supply / discharge system of hydraulic oil to the fluid cylinder, the thrust ring can be mounted on a roll and separated without manual operation. Work can be processed mechanically.

Further, when a fluid cylinder for driving the wedge is provided, the wedge can be wedge-engaged with the main body of the thrust ring by an external operation. For this reason, the thrust block included in the main body can be abutted against the wall of the axial end face of the roll neck groove, and assembling with an appropriate play between the thrust ring and the roll can be performed. .

Furthermore, if the thrust block and the carrier ring are directly wedge-engaged, only a fluid cylinder is required for operating the thrust block, and the apparatus can be simplified and downsized. .

Also, by mechanically connecting the thrust ring and the chock by the engagement mechanism, the chock, the chock cover and the thrust ring can be integrally attached to and detached from the roll without removing the thrust ring in the chock cover. It is also possible to do.

Further, by connecting a supply / drainage system for hydraulic oil to / from the thrust ring to the chock attaching / detaching device so that automatic connection is possible at the time of chock attaching / detaching, fully automatic chock attaching / detaching can be achieved, and labor can be saved.

[0021]

FIG. 1 is a longitudinal sectional view showing a main part of a structure for attaching a thrust ring to a roll, and FIG. 2 is an axial view showing an arrangement of a thrust block.

In the figure, a chock 2 supporting a roll 1 and connected to a rolling system of a mill is provided with a bearing 3 as in the prior art.
Are integrated, and a chock cover 2a that wraps around the end of the roll 1 is integrated.

Around the roll 1, a carrier ring 4 abutting on the outer end face of the bearing 3 is arranged, and a thrust ring 5 for holding the bearing 3 by restraining the position of the carrier ring 4 in the axial direction is incorporated. It is.

The thrust ring 5 has an annular main body 5a externally attached to the end of the roll 1 and a radially connected to the main body 5a with respect to the roll 1 in the same manner as described in the section of the prior art. It is provided with a plurality of thrust blocks 5b which are movable and enter the roll neck groove 1a.

The thrust block 5b is slidable in the radial direction in the main body 5a and is connected to a piston rod 5d of a hydraulic cylinder 5c. A spring 5e for urging the piston rod 5d toward the center of the main body 5a is built in the cylinder 5c, and a port (not shown) is opened on the peripheral wall of the cylinder 5c on the rod side of the piston rod 5d to supply hydraulic oil. Enables drainage.

Further, an engagement mechanism for attaching and detaching the thrust ring 5 to and from the roll 1 is provided between the thrust ring 5 and the chock 2 together with the chock 2 and the chock cover 2a integrated therewith. As shown in FIG. 3, the engagement mechanism includes a rod 5g that penetrates a chamber 5f provided on the peripheral surface of the thrust ring 5, and includes a spring 5h that urges the rod 5g toward the roll 1. is there. The rod 5g has a thrust ring 5 at one end.
And has a length such that the other end protrudes toward the thrust block 5b. An engagement hole 2c for receiving the rod 5g is provided on the inner periphery of the chock 2. When the thrust block 5b is moved outward, the thrust block 5b strikes the rod 5g and is pushed out.
So that it can fit into

When the thrust ring 5 is detached from the roll 1 by such an engagement mechanism, the thrust ring 5 is connected to the chock 2 and can be removed from the roll 1 integrally therewith. Also, at the time of attachment to the roll 1, the thrust ring 5 and the chock 2 can be handled integrally as well.

When the thrust ring 5 is mounted on the roll 1 for operation, the thrust block 5b is dropped into the roll neck groove 1a as shown in the figure. In this case, if operation is performed such that oil is supplied from the head side and hydraulic oil is removed from the bore on the rod side, the thrust block 5b moves to the roll 1 side by the restoring force of the spring 5e, and the roll neck groove 1
a. The spring 5e is capable of retaining the thrust block 5b in the roll neck groove 1a by overcoming the rotational centrifugal force of the roll 1 in operation, and has a spring force enough to support the wedge tilt reaction force due to the thrust load. Shall have.

As shown in FIG. 1, a cylinder 20 may be provided on the thrust ring 5 and a spring 21 and a stopper 22 may be incorporated therein. This stopper 2
Reference numeral 2 indicates that when the thrust block 5b is dropped into the roll neck groove 1a, it can be locked more reliably.

When the thrust ring 5 is to be removed from the roll 1, if the piston rod 5d is moved upward in FIG. 1 by injecting hydraulic oil from the port, the thrust block 5b is pulled out from the roll neck groove 1a. Can be.

The carrier ring 4 is disposed with its both end faces abutting against the end faces of the main body 5a of the bearing 3 and the thrust ring 5, respectively. In the conventional example, while there is an axial play between the roll neck groove 1a and the thrust block 5b dropped therein, a wedge 6 for eliminating the play is incorporated into the carrier ring 4.

In order to move the wedge 6 in the radial direction with respect to the roll 1, the carrier ring 4 has a cylinder bore 4.
a, and a piston rod 6a integrated with the wedge 6
Is connected to the cylinder bore 4a. Cylinder bore 4a
A spring 4b for urging the piston portion upward in FIG. 1 is housed therein, and a port (not shown) for supplying and discharging hydraulic oil is provided at the upper end side of the cylinder bore 4a.

The wedge 6 is the main body 5a of the thrust ring 5.
A surface facing the end surface of the second member has a tapered surface 6b inclined toward the bearing 3 from the lower end toward the upper end. The end face of the main body 5a has a pressure receiving surface 5i having the same inclination angle as the tapered surface 6b.
The tapered surface 6b and the pressure receiving surface 5i can be taperedly engaged with each other.

Here, in the state of FIG.
Hydraulic oil in a is removed, the piston rod 6a moves upward by the urging force of the spring 4b, and the wedge 6 is at the position farthest from the peripheral surface of the roll 1. At this time, the main body 5a of the thrust ring 5 is pushed rightward in the drawing due to the taper engagement between the tapered surface 6b and the pressure receiving surface 5i. Therefore, the thrust block 5b
Can be abutted against the side wall 1a-1 on the end side of the roll 1 in the roll neck groove 1a, and an appropriate gap can be set.

In the above configuration, the operation of removing the thrust ring 5 mounted on the roll 1 is as follows.

First, the assembly of the roll 1 is removed from the mill, and a supply oil supply hose (not shown) is connected to the respective ports of the cylinder 5c and the cylinder bore 4a of the thrust ring 5 and the carrier ring 4.

When hydraulic oil is first supplied to the cylinder bore 4a, the piston rod 6a moves in the direction of the arrow in the drawing, and the wedge 6 approaches the peripheral surface of the roll 1. Therefore, the taper engagement between the tapered surface 6b and the pressure receiving surface 5i is released, and the acting force for pushing the thrust block 5b rightward is relaxed.

Next, when hydraulic oil is supplied to the cylinder 5c, the piston rod 5d moves upward in the figure, and the thrust block 5b comes out of the roll neck groove 1a.
Finally, as shown by the dashed line in the figure, the thrust block 5b is moved to a position away from the outer peripheral surface of the roll 1, thereby eliminating the interference between the thrust block 5b and the roll 1. At this time, the rod 5g of the engagement mechanism is pushed outward by the thrust block 5b and fits into the engagement hole 2c of the chock 2.

As described above, when the chock 2 is removed from the roll 1, the thrust ring 5 is also removed integrally therewith, and the disassembling operation of the bearing 3 is also performed thereafter.

The procedure for mounting the chock 2 and the thrust ring 5 on the roll 1 may be performed in a manner reverse to that described above.
That is, the wedge 6 is brought close to the roll 1 side, and the thrust ring 5 is attached to the end face of the carrier ring 4.
Of the body 5a. Then, when hydraulic oil is injected into the cylinder 5c, the thrust block 5b moves from the position indicated by the dashed line in FIG. 1 until it enters the roll neck groove 1a.

Next, if the hydraulic oil escapes from the cylinder bore 4b and the hydraulic oil escapes from the spring 4b, the piston rod 6a moves away from the roll 1. As a result, the tapered surface 6b of the wedge 6 gradually engages with the pressure receiving surface 5i of the main body 5a, and applies an action force for pushing the thrust block 5b to the right.

As described above, not only can the thrust block 5b fit into the roll neck groove 1a, but also the wedge 6 can be incorporated as a connection structure with no gap between the roll 1 and the appropriate gap can be set. . Therefore, there is no displacement of the roll 1 in the axial direction, and it is possible to suppress a change in load on the bearing 3.

The springs 4b and 5c have a function of stably holding the locks of the bearing 3 and the thrust block 5b by overcoming the centrifugal force during the operation of the mill.

FIG. 4 is a longitudinal sectional view of a main part showing another embodiment.
FIG. 5 is an enlarged vertical sectional view of a main part, and FIG. 6 is a diagram showing a supply system of hydraulic oil, as viewed in the axial direction of the roll. In addition,
The same members as those in the previous example are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, the main body 5a of the thrust ring 5 is shown.
Is provided with a notch 5j on the surface facing the carrier ring 4,
The carrier ring 5 is arranged so as to protrude from the notch 5j into the main body 5a. Then, a tapered surface 4c is formed on the end face where the carrier ring 4 enters the main body 5a, similarly to the wedge 6 in the above example.

On the other hand, a thrust block 5b connected to a body 5a by a cylinder 5c and a piston rod 5d.
Is provided with a pressure receiving surface 5b-1 having the same inclination angle as the tapered surface 4c of the carrier ring 5. Further, as in the previous example, as an engagement mechanism between the thrust ring 5 and the chock 2,
The thrust ring 5 is provided with a rod 5g which moves in a direction protruding to the outside by the operation of the thrust block 5b, and the chock 2 is provided with an engagement hole 2c into which the rod 5g is fitted.

The supply and discharge of hydraulic oil to and from the cylinder 5c provided for each thrust block 5b is performed by the main body 5a as shown in FIG.
The connection is made by connecting a hose from an external hydraulic device (not shown) to a common supply / discharge port 7 provided on the peripheral surface of the device. From the supply / discharge port 7, a branch path 7a surrounding each cylinder 5c is formed on the entire circumference of the main body 5a, and it is possible to supply and discharge hydraulic oil to and from each cylinder 5c at the same time.

When the thrust ring 5 is mounted on the roll 1, hydraulic oil is injected from the supply / discharge port 7, and the thrust block 5b is fitted into the roll neck groove 1a. At this time,
As shown in FIG. 5, the pressure receiving surface 5b of the thrust block 5b
-1 comes into contact with the tapered surface 4c of the carrier ring 4 and moves to the position indicated by the dashed line. Therefore, the thrust block 5b is pushed to the right in the drawing by the taper engagement between the pressure receiving surface 5b-1 and the tapered surface 4c, and the thrust block 5b is placed on the end wall of the roll neck groove 1a.
Is hit. For this reason, the thrust ring 5 can be mounted without forming a gap in the axial direction between the thrust ring 5 and the roll 1.

When hydraulic oil is supplied from the supply / discharge port 7, the thrust block 5b comes out of the roll neck groove 1a together with the piston rod 5d, and the load on the thrust block 5b is released. Then, the thrust ring 5 integrated with the chock 2 can be pulled out from the roll 1 by the rod 5g and the engagement hole 2c.

FIG. 7 shows an example in which the wedge 6 is driven by a wedge mechanism.

In the figure, an auxiliary ring 8 is incorporated between a carrier ring 4 and a thrust ring 5, and a wedge 6 is disposed therein. The wedge 6 has a rod 6c integrated therewith and a receiving block 6d provided at its tip. The receiving block 6d is slidable in the auxiliary ring 8 and a spring for urging the wedge 6 toward the roll 1 is provided. 8a.

On the other hand, the carrier ring 4 is provided with a cylinder bore 4e parallel to the axis of the roll 1 and a piston rod 4f. The cylinder bore 4e is connected to the hydraulic oil supply / discharge system as in the previous example, and incorporates a spring 4g for urging the piston rod 4f toward the auxiliary ring 8 side. A drive block 4h which abuts against a receiving block 6d of the auxiliary ring 8 is provided at the tip of the piston rod 4f.
Is provided.

The receiving block 6d and the driving block 4h have their surfaces in contact with each other inclined to enable wedge engagement. As shown in the figure, when the driving block 4h moves to the right, the receiving block 6d rises and moves to the left. Then, the receiving block 6d is pushed down by the spring 8a.

In the illustrated state, hydraulic oil is injected into the cylinder bore 4e, and the piston rod 4f is moved rightward by the spring 4g. At this time, drive block 4
The h causes the receiving block 6d to rise, whereby the wedge 6 also moves upward and pushes the main body 5a to the right by the taper engagement between the tapered surface 6b and the pressure receiving surface 5f of the main body 5a. Therefore, the thrust block 5b can be abutted against the end wall of the roll neck groove 1a, and assembling without an axial gap between the thrust ring 5 and the roll 1 becomes possible.

When hydraulic oil is supplied to the cylinder bore 4e, the piston rod 4f moves to the left in the drawing, and the drive block 4h moves at the same time. Therefore, the level of the contact point with the drive block 4h gradually decreases, and the receiving block 6d moves toward the roll 1 by the spring 8a. Therefore, the engagement between the tapered surface 6b and the pressure receiving surface 5f is released, and the acting force for pushing the thrust ring 5 is reduced.

Thereafter, hydraulic oil is supplied to the cylinder 5c of the thrust ring 5 to pull out the thrust block 5b from the roll neck groove 1a as in the previous example. This allows
The thrust ring 5 can be withdrawn from the roll 1.

FIG. 8 shows an example in which the wedge is operated by a cylinder and a link mechanism.

In the figure, an auxiliary block 10 is incorporated between the carrier ring 4 and the thrust ring 5, and the wedge 6 is arranged in the auxiliary block 10. A link rod 10a is connected to the tip of the rod 6e of the wedge 6, and an intermediate portion thereof is pivotally connected to the auxiliary block 10 by a pin.

On the other hand, the carrier ring 4 is provided with a cylinder bore 4e similarly to FIG.
And a slider 4i that slides in the auxiliary block 10 is provided at the tip. The slider 4i is connected to the ring rod 10a, and transmits the stroke operation of the piston rod 4f to the wedge 6 via the ring rod 10a.

In the illustrated example, the thrust block 5b fits into the roll neck groove 1a,
Are integrated with the roll 1. When hydraulic oil is supplied to the cylinder bore 4e, the piston rod 4f moves to the left in the drawing, and the link rod 10a rotates clockwise around its pivot. Therefore, the rod 6e connected to the link rod 10a moves toward the roll 1, and the wedge 6 also moves in conjunction with the taper surface 6b of the main body 5a to move away from the pressure receiving surface 5f. Therefore, the load on the thrust block 5b is eliminated, and when the hydraulic oil is supplied to the cylinder 5c, the thrust block 5b can be pulled out from the roll neck groove 1a.

When the thrust ring 5 is mounted, hydraulic oil is injected into the cylinder bore 4e, and the piston rod 4f moves rightward by the spring 4g, thereby rotating the link rod 10a counterclockwise. Accordingly, the rod 6e moves outward, and the wedge 6 is taperedly engaged with the pressure receiving surface 5f of the main body 5a, so that an axial load can be applied to the thrust block 5b.

FIG. 9 is a longitudinal sectional view of a main part showing another example of the configuration of driving the wedge by the cylinder and the link mechanism.

As shown in FIG. 8, the carrier ring 4 is provided with a cylinder bore 4e, into which a piston rod 4f is incorporated, and biasing the piston rod 4f toward the thrust ring 5 by a spring 4g.

The wedge 6 is provided with an engagement block 6g inclined obliquely upward toward the cylinder bore 4e. A pressing block 4j for pressing the engagement block 6g toward the roll 1 is provided at the tip of the piston rod 4f.

The hydraulic oil is supplied from the state shown in the cylinder bore 4e.
, The piston rod 4f moves to the left, and in conjunction with this, the pressing block 4j also moves to the left on the engaging block 6g. Then, since the engagement block 6g is inclined upward and to the left, the wedge 6 is gradually pushed toward the roll 1 with the movement of the pressing block 4j. Therefore, the engagement between the tapered surface 6b and the pressure receiving surface 5f is released, and the axial load on the thrust block 6b is released.

When hydraulic oil is injected into the cylinder bore 4e, the piston rod 4f moves to the left. For this reason,
The engagement block 6g moves toward the bearing 3 due to the inclination of the engagement block 6g, returns to the original position in FIG. 11, locks the wedge 6 against the main body 5a, and is formed by the taper engagement between the tapered surface 6b and the pressure receiving surface 5i. 5b can be loaded in the axial direction.

FIG. 10 is a longitudinal sectional view of a main part showing an example in which the operation of the wedge 6 is performed by a cylinder and a rack and pinion mechanism.

6 and 9, a cylinder bore 4e is provided in the carrier link 4, and a piston rod 4f is incorporated in the cylinder bore 4e, and a spring 4g for urging the piston rod 4f toward the bearing 3 is provided. ing.

A driven rack 6 f is integrally provided on the wedge 6 in a direction away from the roll 1,
Incorporate manually into the. Then, a pinion 11 that meshes with the driven rack 6a is incorporated, and a drive rack 11a that meshes with the pinion 11 is provided at the tip of the piston rod 4a.

When hydraulic oil is supplied to the cylinder bore 4e from the state shown in the figure, the piston rod 4f moves to the right, and the driving rack 11a moves accordingly. Therefore, the pinion 11 rotates clockwise, and the driven rack 6f meshing with the pinion 11 moves toward the roll 1. Therefore, the wedge 6 is separated from the pressure receiving surface 5f of the main body 5a to be released from the taper engagement, and the roll neck groove 1a of the thrust block 5b is released.
Can be extracted.

When the operating oil is removed from the cylinder bore 4e, the spring 4g moves the piston rod 4f to the left together with the drive rack 11a. Therefore, the pinion 11 rotates counterclockwise, and the drive rack 6f moves for planting. Therefore, the tapered surface 6b of the wedge 6 comes into engagement with the pressure receiving surface 5f, and the thrust block 6b
In the axial direction.

FIG. 11 is a front view of an example provided with an attachment / detachment device for the thrust ring 5, and FIG. 12 is a right side view of FIG.

In the figure, a roll receiving stand 12 receives the roll 1 assembly removed from the rolling mill.
And a chock detachable cart 13 on which chocks 2 can be mounted is disposed on the left and right sides.

The roll receiving base 12 is provided with two receiving rollers 12a for supporting the body of the roll 1 on the cylinder 12b.
It is provided to be able to move up and down.

The chock detachable cart 13 can run in a posture parallel to the axis of the roll 1 and has a choc receiver 1 on which the chocks 2 and the chock cover 2a can be mounted.
3a and a thrust ring receiver 13b are provided so as to be vertically movable by a cylinder device (not shown).

Further, in order to attach and detach the thrust ring device 5 to and from the roll 1, a joint device 14 for supplying and discharging hydraulic oil is provided. This joint device 14 has a configuration in which a flow path can be automatically connected to the port 7 of the hydraulic oil described with reference to FIG. 5, and the outline thereof is shown in FIG.

The joint device 14 is provided on the chock detachable carriage 13 and has a connector 14b to which a hose 14a from a hydraulic oil supply source is connected. The connector 14b can be connected to the supply / discharge port 7 of the thrust ring 5. Things. In order to enable the connector 14b to be connected to the supply / discharge port 7, a guide 14c is provided.
The connector 14b is connected via a cylinder 14e to a base 14d that can travel on the base c, and the base 14d can be driven by a positioning cylinder 14f. Also, connector 1
A sensor 14g of a photoelectric type or the like for alignment with the supply / discharge port 7 is provided on the tip end surface of 4b.

The operation of attaching and detaching the thrust ring 5 using such a joint 14 is as follows.

First, the chock attaching / detaching cart 13 is made to stand by at a position not interfering with the roll 1 with respect to the roll receiving stand 12, and the body of the roll 1 is placed on the roll receiving stand 12, and the chock receiver 13 a is moved. To raise.

Thereafter, the connector 14b of the joint device 14 is connected to the supply / discharge port 7 through the opening 2b opened in the chock cover 2a. Then, when hydraulic oil is injected from the supply / discharge port 7, the thrust block 5b
Moves in a direction to get out of the roll neck groove 1a and is set at a position where it does not interfere with the outer periphery of the roll 1.

Next, the chock 2 is moved away from the roll 1 while the flow path with the joint device 14 is connected.
a and the thrust ring 5 are withdrawn from the roll 1.

When the thrust ring 5 is mounted on the roll 1, hydraulic oil is supplied in a state where the joint device 14 is connected to the port 7, so that the thrust block 5b does not interfere with the outer peripheral surface of the roll 1. To be kept. Then, the roll 1 is moved by the chock attaching / detaching device 13.
The thrust ring 5 is set at a fixed position together with the chock 2 and the chock cover 2a.

After the position is set, when hydraulic oil is injected by the joint device 14, the thrust block 5b is fitted into the roll neck groove 1a by the urging force of the spring 5e, and a gap is formed in the axial direction as shown in FIG. Assembling of the thrust ring 5 and the roll 1 can be performed.

Also, as shown in the examples of FIGS. 1 and 6 to 10, even if each of the thrust block 5b and the wedge 6 uses a separate cylinder device, these cylinder devices are independent of each other. By providing two systems of supply passages for the working oil and joining the joints 14 to these two systems, the supply and discharge of the working oil can be performed independently.

[0085]

According to the present invention, since there can be provided an assembly structure in which there is no axial gap between the thrust block and the roll, there is no fluctuation in the axial load on the bearing, and the life of the bearing is improved. For this reason, it can be optimally incorporated in various rolls including a roll for hot rolling and a roll for shaped steel with a high load.

Further, the thrust block can be taken in and out of the roll neck groove only by connecting the hydraulic oil supply / discharge system from the outside to the thrust ring flow path system, thereby simplifying the work and improving safety. . In particular, if the joint of the hydraulic oil is connected by using the opening of the chock cover, it is possible to extract from the roll without removing the chock cover, and the working time is shortened.

[Brief description of the drawings]

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

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

FIG. 3 is a schematic view showing a main part of an engagement mechanism provided between a thrust block and a chock.

FIG. 4 is a longitudinal sectional view showing a main part of an example in which a carrier ring is directly abutted on a thrust block.

FIG. 5 is an enlarged vertical sectional view showing engagement between a pressure receiving surface of a thrust block and a tapered surface of a carrier ring.

FIG. 6 is a partial front view showing a flow path system for hydraulic oil in the example of FIG. 3;

FIG. 7 is a longitudinal sectional view of a main part showing an example in which an operation of a wedge is performed by a block that is taperedly engaged with a cylinder device.

FIG. 8 is a longitudinal sectional view of a main part showing an example in which an operation of a wedge is performed by a cylinder device and a link mechanism.

FIG. 9 is a longitudinal sectional view of a main part showing an example in which the operation of the wedge is performed by a cylinder device and a pressing mechanism.

FIG. 10 is a longitudinal sectional view of a main part showing an example in which an operation of a wedge is performed by a cylinder device and a rack and pinion mechanism.

FIG. 11 is a front view showing the entire attachment / detachment device for the thrust ring, the chock, and the chock cover.

FIG. 12 is a right side view of FIG. 11, showing an arrangement of joints.

FIG. 13 is a schematic view of a joint device for supplying and discharging hydraulic oil to and from the thrust ring.

FIG. 14 is a sectional view showing a conventional example of a mounting structure of a thrust ring.

[Explanation of symbols]

1 roll 10
Auxiliary block 1a Roll neck groove 10a
Link rod 2 Chock 11
Pinion 2a Chock cover 11a
Drive rack 3 Bearing 12
Roll cradle 4 Carrier ring 13
Chock detachable trolley 5 thrust ring 14
Joint device 5a Body 5b Thrust block 5c Cylinder 5d Piston rod 5e Spring 5f Pressure receiving surface 6 Wedge 6a Piston rod 6b Tapered surface 7 Supply / discharge port 8 Auxiliary ring 9 Link rod

──────────────────────────────────────────────────の Continued on the front page (72) Inventor: Rihiro Nakagawa 46-59, Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Machinery & Plant Business Department (72) Inventor: Hidehiro Ito Tobata, Kitakyushu-shi, Fukuoka Within Nippon Steel Plant Design Co., Ltd. at 46 Ohara Nakahara-ku (72) Inventor Minoru Kanamori Within Nippon Steel Plant Design Co., Ltd. at 46 Oaza Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture Nippon Steel Corporation Yawata Works, 1-1, Tobata-ku, Ichihata (72) Inventor Seiji Yamaguchi 1-1, Hibata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation, Yawata Works (72 Inventor Hirosuke Nakamura 1-1, Hibata-cho, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Yawata Works (72) Inventor Mamoru Nishida Kitakyu, Fukuoka Prefecture 46-59 Nakahara, Tobata-ku, Oita-shi Nippon Steel Corporation Machinery & Plant Division (56) References Japanese Utility Model Sho 62-6906 (JP, U) Japanese Utility Model Sho 60-25284 (JP, Y2) (58) ) Surveyed field (Int.Cl. ⁶ , DB name) B21B 31/07 B21B 31/02 B21B 31/10

Claims (6)

(57) [Claims] 1. A thrust ring provided with a thrust block capable of being depressed in a roll neck groove cut in the roll by applying a restraining force in an axial direction to a bearing in a chock for supporting the roll. A thrust ring of a roll in a rolling mill, comprising: a fluid cylinder device that performs a stroke operation toward the center side; and the thrust block is connected to the fluid cylinder device. 2. A carrier ring disposed around a roll with one end face abutting against a bearing in a chock; a thrust ring body for acting and transmitting an axial restraining force to the carrier ring; In a thrust ring including a plurality of thrust blocks that can be moved in the radial direction with respect to the roll and can be dropped into a roll neck groove provided in the roll, between the carrier ring and the opposing surfaces of the main body, A wedge that pushes the main body away from the carrier ring by wedge engagement is provided so as to be movable in the radial direction of the roll, and the thrust block and the wedge are connected to a fluid cylinder built in the main body and the carrier ring, respectively. Then, when the main body is pressed, the axial end face of the thrust block is brought into contact with the roll neat. Mounting structure for a thrust ring of a roll in a rolling mill capable of abutting against a radial side wall of a groove. 3. A carrier ring arranged around the roll with one end face abutting against a bearing in the chock; a thrust ring body axially connected to the carrier ring and arranged around the roll; A plurality of thrust blocks that are movable in the radial direction with respect to the roll and that can be dropped into a roll neck groove provided in the roll, wherein the thrust block is connected to a fluid cylinder built in the main body. Then, the end face of the carrier ring and the end face of the thrust block can be brought into contact with each other by wedge engagement, and when the thrust block is advanced into the roll neck groove by the fluid cylinder, the wedge engagement causes Abut the axial end surface of the thrust block against the radial side wall of the roll neck groove The mounting structure of the thrust ring of the roll in the rolling mill becomes possible. 4. The mounting structure for a thrust ring of a roll in a rolling mill according to claim 1, wherein a supply / discharge system of hydraulic oil to / from the fluid cylinder is detachable from outside the roll assembly. 5. An engagement mechanism between the thrust ring and the chock, wherein the engagement mechanism engages the thrust ring and the chock with each other in conjunction with movement of the thrust ring to the outside of the main body. 4. A mounting structure for a thrust ring of a roll in the rolling mill according to any one of claims 1 to 3. 6. The mounting structure for a thrust ring of a roll in a rolling mill according to claim 1, further comprising a stopper that is actuated by hydraulic pressure in a roll axis direction for urging the thrust block.