JPS6021005B2 - Roll chock changing device for rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll chock changing device for a rolling mill that can easily change roll chocks that rotatably support rolls of various rolling mechanisms from old rolls to new rolls.

Generally, in various rolling mills such as strip mills, the roll neck is rotatably held by a roll chock with built-in rolling bearings, etc., and the roll chock holding the roll is attached to the rolling mill housing (or stand). is supported by

In a roller bearing-type roll chock using roller bearings, the roller bearings are assembled with an appropriate amount of play, and the roller bearings are constructed so that they can be handled as one unit. Iron-bonded using the clamping method.

When replacing this kind of roller bearing type roll chock when changing rolls, manually loosen the adjusting ring, release the crimping of the two-part thrust clamp, and remove the thrust clamp from the roll neck. While hoisting the chock with a crane, it was removed from the old roll, and then reassembled by attaching it to the new roll.

As mentioned above, conventional roll chock reassembly work is done mostly manually, other than using a crane, which is inefficient.In addition, roll chocks are heavy, slippery due to oil, etc., and difficult to handle. It was dangerous. In particular, tandem rolling mills with 6 stands, 7 stands, etc. are currently in operation, and it is necessary to replace these rolls at once, which requires a great deal of time and labor, and is a major obstacle to improving productivity. Ta. Therefore, the applicant of the present application has proposed a roll chock for a rolling mill and a roll chock changing device that can automate the silk changing of the roll chock.

In the above proposal, the roll chock uses a thrust clamp divided into two parts and a thrust band that integrates them, so the roll chock recombination device includes a thrust clamp that moves the divided thrust clamp outward and separates it. The device is complicated because it particularly requires a separating device, a pressing device for removing the thrust band from the thrust clamp, and a thrust band device for mounting the thrust band on the thrust clamp. Rolling is also used in high speed rotation. In a roll, a large centrifugal force is applied to the thrust band in the direction in which the thrust clamp tries to divide it, so there is a possibility that the thrust band will be destroyed, and there is a great danger associated with this. There was a problem. The present invention has been made in view of these drawbacks, and it is an object of the present invention to provide a roll chock recombination equipment for a rolling mill that uses an improved roll chock, has a simple structure, and is capable of quickly changing a large number of roll chocks. It is something.

Next, the present invention will be explained according to the drawings which are one embodiment. FIG. 1 shows an example of the arrangement of a recombinant bag pupil A of a roll chock for a rolling mill according to the present invention, in which a roll chock B transported by a crane from a roll stand (not shown) is attached to a roll pedestal 21 described below. The old roll Ra and the new roll Rb for replacement are arranged alternately in parallel and in two stages in a row, and the roll chock silk replacement Hishitaka A is placed on the rail 17 laid along both sides of the roll row. It is arranged so that it can be run.

Now, an example of the roll chock B applied to the present invention will be explained with reference to FIGS. 2 and 3.

A roll chock body 3 having a built-in roller bearing 4 is attached to the neck portion 2 of the roll 1 by a release presser 5 and an inner race presser 6.

The release presser foot 5 is fixed to the roll chock main body 3 through a bolt 10', and the inner race presser 6 has a key 8 therein which is fitted into a key groove 7 provided in the neck portion 2. and the neck portion 2, and has a screw 9 on the outer periphery of its front end. Thrust ring 11
'Well, an annular body 31 having a plurality of thrust piece attachment holes 20 consisting of two bottomed holes 13 and one through hole 19 provided between them and forming a step inside;
A compression coil spring 32 provided in the bottomed hole 13 and a compression coil spring 32 provided in the through hole 19 constantly apply an outward force to prevent the inner step of the through hole 19 from slipping out. It consists of a thrust piece 33 that can be attached. Furthermore, the thrust piece 33 is connected to the ring body 31
It has a tapered surface that receives external force on the weave that protrudes on the outer periphery,
When pushed down by an external force, the other end protrudes inward of the ring body 31 and enters the ring body groove 12 of the neck portion 2. An annular stepped portion 39 with a raised circumferential portion is formed on the outward facing end surface of the ring body 31, so that inner sleeves 64 and 65 described below can be carried inside the stepped portion 39. ing. Then, when the thrust piece 33 is pushed down by an external force and carried into the annular guide 12, the inner race presser 6
The nut 14 is moved to the right in FIG. 2 by meshing the gear 54 or 62 described below with the gear 16 provided on the outer periphery of the nut 14, which has a screw 15 that engages with the screw 9 of the nut 14. That is, the thrust piece 33 is pressed against the side wall of the annular groove 12 via the inner race retainer 6 and the nut 14 to prevent the roller bearing 4 from coming off.
A roll chock B is attached to a roll neck portion 2.

Note that the inner race presser 6 and the nut 14 constitute an adjusting ring C.

Therefore, by removing the thrust piece 33 from the annular groove 12, the roll chock B can be removed from the roll neck portion 2.

Further, as shown in FIGS. 4 to 7, the roll pedestal 21 has a circular arc-shaped first support supporting the neck portions 2 at both ends of the lower roll lb.
Two shafts 26 are provided which are supported by the support member 23 and the pedestal main body 22 and have a fan-shaped gear 25 that meshes with each other at the center. The second arm 26 has both end arms 27 separated from each other and supports the neck part 2 of the upper roll la at both ends with its upper arcuate part 28.
A support member 24 is provided.

Next is the roll chock recombination device A, which is
Roughly, as shown in FIG. 7, a traveling carriage 40 runs on a rail 17 laid parallel to the row of roll pedestals.
, motor-driven gears 54 and 62 for tightening and loosening the nuts 14 constituting the roll chock crimp fitting 42 and the adjusting ring C, and the thrust piece 3 of the thrust ring 11.
The chock carrier 41 is equipped with a tapered sleep device 34 for raising and lowering the roll chock 3, and a chock receiving carriage 41 that travels on the traveling carriage 40 and advances and retreats on the rail 18 with respect to the roll chock changing roll.

A main frame 35 containing the mounting device therein is assembled on the chock carrier 41.

In addition, the installed rhombuses are of the same construction in two levels, upper and lower, and the upper level is attached to a sub-frame 37 suspended by a screw-type lifting device 36 provided on the ceiling of the main frame 35. and the lower one is chock carrier 41
installed on top. The roll holder 21 of the first gate-shaped frame 37 is on the roll holder 21 side of the sub-frame 37.
A first gate-shaped frame 43 is provided on the side, and support claws are provided on both sides of the frame 43 to support the protruding portion 3a of the roll chock body 3 of the roll la to be damaged from below on the upper part of the roll pedestal 21. 45, and a pressing cylinder 46 which presses and fixes the roll chock main body 3 with the support claw 45 is provided at the upper center.

On the other hand, the chock carrier 41 is located below the frame 43 and below the roll carrier 21 . A pressing cylinder 47 that presses the overhanging portion 3a of the roll chock body 3 of the roll lb from above, and a lifting operation that presses and fixes the roll chock body 3 with the pressing cylinder 47 by pulling up the support claw 48 that supports the roll chock body 3 from below. cylinder 49
The cylinders 44, 46, 47, 49 and the support claws 45, 48 form a roll chock crimping layer 42.
Configure. At the rear of the first gate-shaped frame 43, a second gate-shaped frame 50 is provided, in which an upper frame 51 can be opened and closed about a shaft 53 by a cylinder 52, and in the center of the upper frame 51, the upper roll Nut 14 of Asia string C in roll choke B of la
A gear 54 that meshes with the gear 16 is provided.

This gear 54 is fixed to the tip of a rotating shaft 58 via a ball joint 57 to an oil motor 56 mounted on a rear frame 55.
It is possible to engage and release the gear 16 of No. 4. Also,
A mechanism similar to the above is also provided on the chock carrier 41. That is, the oil motor 59 is provided with a gear 62 by a ball joint 60 and a rotating shaft 61, and is moved up and down by a cylinder 63, and can be disengaged from the nut 14 of the lower roll lb. Further, a third frame 38 is provided at the center of the subframe 37, and the third frame 38 has a cylindrical shape, and has an inner diameter that is approximately equal to that of the thrust ring 11, and an outer diameter that is substantially the same as that of the thrust ring 11. An inner sleeve 64 having an inner diameter approximately equal to the inner diameter of section 39 is attached.

The inner sleeve 64 includes an outer sleeve 66 which has a cylindrical shape, has an inner diameter larger than the outer diameter of the thrust ring 11, and has a tapered inner surface at the end on the roll pedestal 21 side. It is slidably attached to a guide provided on the side. That is, the inner sleeve 64 is attached to the chock carrier 4.
When the roll chock 3 is replaced, the thrust ring 11 is supported by inserting iron into the stepped portion 39 of the thrust ring 11. Further, a cylinder 68 is connected to the outer sleeve 66, and the operation of the cylinder 68 causes the outer sleeve 66 to move forward and backward in the left and right directions in FIG. 7, thereby raising and lowering the thrust piece 33. Furthermore, 73
, 74 are the inner sleeves, and the outer sleeves 64, 66 are the thrust ring 1.
This is a shock absorber for absorbing the impact when it comes into contact with 1. On the other hand, the similar machine on the chock carrier 41 consists of an inner sleeve 65, an outer sleeve 67, a cylinder 69, and shock absorbers 75 and 76.
65, outer sleeves 66, 67, cylinders 68, 69, and shock absorbers 73, 74, 75, 76 constitute a tapered sleeve device 34. The screw type lifting device 36 is connected to a motor 72 via rotating shafts 70 and 71, and depending on the height of the upper roll la,
The height of the sub frame 37 is adjusted by driving the motor 72.

Next, how to use the recombined roll chock Hishitaka having the above configuration will be explained.

As shown in FIG. 1, it is assumed that the old roll Ra on which the new roll Rb and the roll chock B are attached to the roll pedestal row has been repaired in advance.

In addition, the roll chock crimping mounting straight 4 of the chock carrier 41
2 cylinders 44, 49 are extended, and cylinders 46,
47 is contracted, the upper frame 51 of the second gate-shaped frame 50 is opened, and the gear 54 is retracted upward.

Note that the gear 62 is also retracted downward. Further, the cylinders 68 and 69 of the tapered sleep device 34 are contracted, the outer sleeves 66 and 67 are retracted, and the subframe 37 is retracted.
It is assumed that the height of is adjusted by the motor 72 to match the height of the upper roll la. To remove the roll chock B from the old roll Ra, move the running carts 40 on both sides.
are respectively positioned to the sides of predetermined old rolls Ra, and each chock carrier 41 is advanced to the position shown by the two-dot chain line in FIG.
65 end faces are iron-fitted into the stepped portions 39 of the end faces of the thrust rings 11 of the upper and lower rolls. At this time, the outer sleeves 66 and 67 are
The end tapered surface and the outer circumferential tapered surface of the thrust piece 33 are stopped just before contacting each other, and the roll chock B of the upper and lower rolls la and lb is located at the shoulder attachment point 42 of the chock carrier 41. , gears 54, 62
are located above and below the nuts 14, 14 of the adjusting ring C, respectively. Then, the cylinders 44, 46, 47, and 49 of the crimp layer 42 are actuated to crimp the protruding portion 3a of the roll chock body 3 and fix the roll chock B to the crimp layer 42.

Next, the cylinder 52 of the upper frame 51 of the second gate-shaped frame 50 is operated to move the gear 54, and the gear 62 is moved up and down, respectively. When the gears 16 of each nut 14 of the tool chock B are engaged and the motors 56 and 59 are driven to move the nuts 14 to the left in FIG. The thrust piece 33 is pushed outward by the coil spring 32, releasing the thrust piece 33 from the annular groove 12. In this state, when the chock carrier 41 is moved backward, the roll chock B remains on the chock carrier 41 (because it is crimped and fixed with the roll chock crimping straight 42), that is, it is removed from the neck portion 2 of the rolls la and lb. When it is done, it becomes.

In addition, at this time, the thrust ring 11 is connected to the inner sleeve 64,
65 and is held in its normal position. When the roll chock B is removed from the rolls la and lb in this manner, the traveling carriage 40 is moved to be located on the side of the adjacent new roll Rb, and the operation opposite to the above-mentioned roll chock removal is performed.

That is, the chock carrier 41 is advanced and the new roll Rb
At the same time, the cylinders 68 and 69 are operated to remove the outer sleeve 66,
67 is advanced and the tapered surfaces of the ends of the outer sleeves 66 and 67 push down the tapered surfaces of the thrust pieces 33 of the upper and lower rolls, thereby causing the thrust pieces 33 to protrude toward the inner surface of the thrust ring 11 and to be carried into the annular groove 12. let Next, the gears 54, 62 are rotated by motors 56, 59 to move the nut 14, the inner race retainer 6 is attached to the roller bearing 4, the thrust piece 33 is attached to the outer wall of the annular groove 12, and the roll chock B is attached to the neck portion. Attach it to 2.

After that, each cylinder 44, 46, 4 constituting the gears 54, 62, the tapered sleeve mounting 34, and the crimping mounting 42
7, 49 are returned to their original states and the chock carrier 41 is moved backward, thereby completing the changeover of the roll chock B to the new roll Rb. It goes without saying that the above operation is performed simultaneously for the two roll chock paper changers A, A. Thereafter, the above operations are repeated in order to attach the roll chocks B to all new rolls Rb, and then the roll stands are attached using a crane.

In the above embodiment, a case was described in which the roll chocks stacked in two layers (upper and lower) were assembled one after another by running a traveling truck equipped with a chock receiving truck.
If the roll chocks are stacked in one level, only one stage of roll chock changing device is required, and if there is only one roll holder, no traveling cart is required.

As is clear from the above explanation, according to the present invention, roll chocks can be easily rearranged simply by moving the chock carrier and operating the motor and cylinder, thereby improving productivity and saving labor. , and can improve safety.

Furthermore, since the thrust ring is integrated, the structure of the chock carrier is simplified, and the safety of the thrust ring is also improved. Brief explanation of the drawings: Figure 1 is a layout diagram of a roll chock changing device for a rolling mill, Figure 2 is a sectional view of a roll chock applied to the present invention, Figure 3 is a partially sectional front view of Figure 2; Fig. 4 is a front view of the roll pedestal, Fig. 5 is a front view showing the operating state of the roll pedestal,
Fig. 6 is a plan view of Fig. 1, Fig. 7 is a sectional view, including a partial side view, showing the relationship between the rolls and the roll chock changing device, and Fig. 8 is a sectional view taken along line 1-1 in Fig. 7. 9 is a sectional view taken along the Rolo line in FIG. 8, and FIG. 10 is a sectional view taken along the line mm in FIG. 9.

A...Roll chock changing device for rolling mill, B.
...Roll chock, C...Asian ring, R...old roll, Rb...new roll, 1...o-ru, 2...
...Neck part, 3...Roll chock body, 11...Thrust ring, 14...Nut, 34...Boober sleeve installation, 42...Roll chock crimping and reinstallation, 54... Gya, 56, 59. ...Oil motor, 62...gear.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. In a roll chock for a rolling mill in which an annular thrust ring having a protruding mechanism on the inner surface is attached to a roll neck by tightening a nut member of an adjuster ring, a chock support car that moves forward and backward with respect to the end of the roll, and a chock support car on which the roll chock is attached. a crimping device for crimping and fixing the gear, a gear driven by a motor for tightening and loosening the adjuster string that meshes with a gear provided on the outer periphery of the nut member of the adjuster string, and a tapered sleeve device that operates the protruding mechanism provided in the thrust ring. Features: Roll chock changing device for rolling mills.