Apparatus for mounting and dismounting bearing unit of backup roll

FIELD: rolled stock production, namely apparatuses for mounting -dismounting bearing unit of backup roll of rolling stand.

SUBSTANCE: apparatus includes chock in which bearing assembly for roll journal is arranged. Apparatus that may be temporarily joined with bearing unit and may be axially moved in direction of backup roll and from it includes lever type inner and outer cams. Inner cams are introduced to end part of backup roll journal; outer cams are introduced to bearing unit. Inner and outer cams are mounted with possibility of rotation and locking by means of bayonet type lock in end part of journal and in bearing unit. End part of journal and intermediate ring screwed-on to bearing unit at its outer side are in the form of clover leaf having through grooves for inner and outer cams. Said cams after their rotation to clamp position may engage with respective locking protrusions of journal end part and of intermediate ring. In front of outer cams, pressure ring arranged before bearing assembly of journal is mounted.

EFFECT: lowered costs of changing bearing assemblies, increased useful life period and enlarged using range of apparatus.

5 cl, 3 dwg

 

The invention relates to a device for installing and removing the reference node to a reference roll rolling stands, consisting of a pillow placed in her bearing cervical roll.

From the document US 4813113, 21.03.1989 a device for installing and removing the reference node of the reference roll rolling stands, consisting of a pillow placed in her bearing for cervical roll and devices for replacement made with the possibility of a temporary connection with the control node and providing axial movement in the direction of the support roll and from him. This device has a hydraulic pulling tool for removing bearings with cervical roll or the installation of built-in reference junction. This leads to the complexity of the design reference node. In addition, there is at least the same great need for additional space for replacement, and, in addition, a substantial share of spare parts, because we are talking about expensive special structural elements having a long delivery time. Hydraulic inimately also susceptible to external influences on the bearing, such as contaminated oil, damage and nodules, which reduce the service life and/or have the effect of repair.

The basis of the invention lies in the task of creating a device with which could have been avoided OPI the data deficiencies bearings for backup rolls, reducing, in particular, the costs of replacing the bearings and used a generic.

This problem is solved according to the invention by a device for replacement made with the possibility of a temporary connection with the control node and to create axial movement in the direction of the support roll and from him. Since, therefore, there is, on the one hand, individual, i.e. independent from the reference node device for replacement, which, on the other hand, is equally universal purpose to install and to remove the reference node, the replacement unit is sufficient for Assembly and disassembly of the reference nodes; however, in the case when both the reference node of the reference roll should be replaced at the same time, you want a second unit for a replacement. In any case, you no longer need to equip each supporting roll rolling stands built, as before, a hydraulic pulling tool. Not to mention the fact that the device for replacement is no longer affected by the rolling mills, the bearings also have a simple and easy design. The device for replacement may preferably be used in a workshop on the supports and the rolls, and requires only a connection with the dismantling or re-installed base site in order through, if necessary, one device for which ameny to install all the bearings on the respective backup rolls or remove them.

According to another form of execution of the invention, the device for replacement lever contains inner and outer Cams, of which the inner Cams are at the end of the neck support roll, and the outer Cams - reference node. The Cams are in this case, the means of attaching and serve at the same time to enter the axial movement, so that either set the reference node on the neck of the roll, or shoot it with her. Instead of connecting the lobes of the device for replacement you can also attach to a reference node, for example, by threaded connections.

According to a preferred implementation of the invention the inner and outer Cams are made to rotate and locking type bayonet shutter at the end of the neck and the reference node. After the supply or installation of the replacement unit is only required to rotate the inner and outer Cams at an angle of about 45° each, in order to ensure the lock.

According to another preferred implementation of the invention, the end of the neck and screwed from the outside to the control node of the intermediate ring is made in the form of a clover leaf with continuous grooves for the inner and outer Cams, and the Cams in place, after rotating them into position capture interact with the locking tabs of the end of the neck and the intermediate ring, p is item opposite outer Cams, in addition, is located in front of the bearing neck roll control ring. Thus, axial movement entered into a firmly fixed in the base felling Cams, when removing deviates in the opposite direction of motion or force, when the external Cams adjacent to the locking projections of the intermediate ring and, therefore, remove all reference node with cervical roll. In contrast, Cams, arising when the reversing unit is introduced into the inner Cams axial movement of the pressure control ring, resulting in the entire support Assembly is mounted on the neck of the roll.

Although the axial displacement can be implemented mechanically or through the actuator, for example by the worm wheel and the rack, it is preferable arrangement of Cams on the piston embedded in the device for a replacement cylinder. As the cylinder you can use a regular standard cylinders, and by dividing, according to the invention, the pulling tool and the reference node cannot be a mixing of lubricating oil required for the thrust bearing and bearing cervical roll with hydraulic oil.

If mainly drawn from the inner Cam, the free end of the piston of the hydraulic cylinder is equipped with a handwheel, Bayon the percentage locking is achieved in a simple way on the outside, and this one for the whole replacement unit. This suggests that through the slots to the inner and outer Cams as the Cams are located on the same line.

Other details and advantages of the invention described in the claims and in the following description using the example of execution shown in the drawings, where figure 1 shows the end of the cervical support roll rolling stands with shows a longitudinal section of the support site when installing using the replacement unit; figure 2 is a section along the line II-II in figure 1; figure 3 - the object 1 in the removal process.

Of the support roll 1 of figures 1 and 3 shows only the neck 2. On the neck 2 of the roll according to Fig 1 put the anchor node 3, which includes the cushion 4 with bearing for cervical roll or thrust bearing 5. To the front end of the reference node 3 is screwed intermediate ring 6 made in the form of a clover leaf and having alternately through the slots 7 and the locking protrusions 8 (figure 2).

On the neck 2 of the roll or at the end of 9 cervical roll on the locking ring 10 is resting in the thrust bearing 5 control ring 11 and is screwed an annular nut 12. The locking ring 10 also has locking protrusions 13, interacting on the outer periphery of the end 9 of the neck roll with through grooves 14 shown in figure 2 by the dashed lines.

For installation of supports is on node 3 shown in figure 1 the working position of the reference node 3 Orient and position the exact center of the support roll 1; the same applies to the locking ring 10, the locking protrusions 13 which must be aligned with through-slots 14 of the end 9 of the neck roll. Then the anchor node 3 carefully mounted on the neck 2 of the roll and the rotation of the locking ring 10 shown in figure 2 the position of the block on the support roll 1 or the neck 2 of the roll. Inserted following this, the retaining segment 15 (figures 1 and 2) prevents unwanted turning of the locking ring 10. To ensure the final installation of the reference node 3 ring nut 12 tighten until it stops.

After these preparations install the device 16 for replacement, which contains four placed at equal distances from each other, the outer Cam 17 and four also placed at equal distances from each other, the inner Cam 18. Internal Cams 18 interact with more detail shown in figure 2 through the slots 19 on the front end 9 of the neck roll. When installing the unit 16 for replacement of external Cams 17 pass through the slots 9 of the intermediate ring 6 and the inner Cams 18 to pass through the slots 19, and after turning 45° they are depicted in figures 1 and 2 the position of engagement, in which the external Cams 17 is locked at the intermediate ring 6 or the locking protrusions 8 and the inner Cams 19 on the support roll 1 or the end 9 of the neck roll. Internal Cams 18 in the exemplary embodiment are located on the piston 20 attached to the device 16 replacement cylinder 21 and the free end 22 of the piston is equipped with a handwheel 23. While manipulating device 16 for replacement can swivel faucet (not shown), the handwheel 23 allows a simple way to implement locking the rotation of the Cams.

When applying pressure to the cylinder 21 by bold arrow device 16 to replace the held internal Cams 18 on the support roll 1, presses their external Cams 17 control ring 11 to the bearing neck roll or thrust bearing 5. Due to this reference node 3 his sleeve 24 is increasingly coming to the taper of the neck 2 of the roll, until you take the final position of figure 1. For fixing this mounting of the landing ring nut 12 tighten until it stops. The Cams 17, 18 have then aligned with the corresponding through slots 7 and 19, so that the device 16 for replacement may be removed. If you then screw the retaining segment of the ring nut 12, the latter will be protected from unscrewing. As soon as still open cover 25 is rotated to a position closing the neck 2 of the roll (figure 1 are shown by dot-dash), you can start the process rolling.

Shown in figure 3, the removal process in reverse order, in other respects, the however, coinciding with the above-described setting device 16 for replacement, which, however, is preceded by a branch of the restraint segment 15 from the ring nut 12. When loading of the piston 20 of the hydraulic cylinder 21 by bold arrow to the pressure ring 11 is applied pressure, and is discharged annular nut 12, which can then be unscrewed with the possibility of removal of retaining segment (figure 1) (figure 3 not shown). Due to rotation of the locking ring 10 to 45° anchor node 3 is released. After repeated application of hydraulic pressure device 16 to replace the held internal Cams 18 on the support roll 1 through the external Cam 17, which is now adjacent to the locking projections 8 of the intermediate ring 6, off intermediate ring 6 and, thereby, the entire anchor node 3 with the sleeve 24 with the cone of the neck 2 of the roll, as shown in figure 3. As soon as the sleeve 24 is free, you can disable the hydraulic pressure and remove the device 16 for replacement, as described above in connection with the installation process in figure 1. The reference node 3 with the cushion 4 and the thrust bearing 5 is then free for careful removal from the support roll 1.

1. Device for installing and removing the reference node of the reference roll rolling stands, consisting of a pillow placed in her bearing for the neck roll and the replacement unit made the CSOs with the possibility of temporary connection with the control node and providing axial movement in the direction of the support roll and characterized in that the device for replacement lever contains inner and outer Cams, of which the inner Cams are at the end of the neck support roll, and the outer Cams in the reference node.

2. The device according to claim 1, characterized in that the inner and outer Cams are made to rotate and locking type bayonet shutter at the end of the neck and the reference node.

3. The device according to claim 2, characterized in that the end of the neck and screwed from the outside to the control node of the intermediate ring is made in the form of a clover leaf with continuous grooves for the inner and outer Cams, Cams after their turn in the position of the grip have the opportunity to interact with the corresponding locking protrusions of the end of cervical and intermediate rings and across the outer lugs, in addition, is located in front of the bearing neck roll control ring.

4. Device according to any one of claims 1 to 3, characterized in that the internal Cams are located on the piston embedded in the device for a replacement cylinder.

5. The device according to claim 4, characterized in that the facing internal Cam free end of the piston is provided with a handwheel.



 

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