JP3503554B2 - Rolling mill spindle replacement method and backup roll shift device used therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of replacing a spindle of a rolling mill and a backup roll shift device used for the method.

[0002]

2. Description of the Related Art Conventionally, when replacing a spindle of a rolling mill, each of the backup rolls is operated from the inside of the mill housing on the operating side (generally, in rolling mills and rolling mill groups,
The side on which the drive system is provided is called the drive side, and the side on the opposite side to the side operated by the operator is referred to as the operation side). There is a stool described in Japanese Patent Publication No. 61-132212. This is for pulling out from the inside of the mill housing in a state where the upper and lower backup rolls and the spindle are fixed. After inserting the work roll into the space, the backup roll and the spindle are fixed and used.

[0003]

However, in the conventional rolling mill spindle replacement method, the large and heavy upper and lower backup rolls must be completely pulled out from the mill housing, which is time-consuming and troublesome. Further, moving a heavy backup roll is dangerous, and there is also a problem that qualifications and experience of handling heavy objects are also required.

The present invention was developed to solve the above-mentioned problems, and it is possible to greatly reduce the time and labor required for replacing the spindle of a rolling mill, reduce the danger at the same time, and simply replace the spindle. It is an object of the present invention to provide a rolling mill spindle replacement method and a backup roll shift device used therefor.

[0005]

In order to solve the above problems, the method for replacing a rolling mill spindle according to claim 1 of the present invention is a method for replacing a spindle disposed on the drive side of a rolling mill. After removing the work rolls from the rolling mill, install a table with a slidable mount in the housing of the rolling mill, place the upper backup roll on the mount, and place the mount from the drive side. It is characterized in that it slides to the operating side, shifts the upper backup roll, and pulls out the spindle upward.

According to a second aspect of the present invention, the spindle replacing method according to the first aspect is characterized in that the table is placed on a bending block of a housing of a rolling mill. . The backup roll shift device according to claim 3 of the present invention is the backup roll shift device used in the rolling mill spindle replacement method according to claim 1 or 2, wherein the table can be installed in the mill housing, and an upper part. A gantry slide device for shifting a gantry on which a backup roll is mounted from a driving side to an operating side is provided.

The backup roll shift device according to claim 4 of the present invention is the backup roll shift device used in the method for replacing a rolling mill spindle according to claim 1 or 2, and can be installed in a mill housing. It consists of a table and the table inside which the table is mounted.
The table is provided with a gantry slide device that shifts the gantry on which the upper backup roll is placed from the drive side to the operation side, and the pedestal is provided with an elevating device for installing the table in the mill housing. It is a feature.

According to a fifth aspect of the present invention, in the backup roll shift device according to the fourth aspect of the invention, the table is installed in the mill housing after the table is installed in the mill housing. It is characterized in that it can be carried out from the store. Also,
A backup roll shift device according to a sixth aspect of the present invention is characterized in that, in the fifth aspect of the invention, the carriage is driven by a work roll transport ram latch.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is an overall configuration diagram of a backup roll shift device used in the rolling mill spindle replacement method of the present embodiment, FIG. 2 is a configuration diagram of a trolley, and FIG. 3 is a configuration diagram of a table. FIG. 1 shows a backup roll shift device 1 according to the present embodiment, which includes upper and lower backup rolls UB and L.
It is shown that the backup roll shift device 1 is inserted between the upper and lower backup rolls with the table 3 placed on the trolley 2 as is clear from the figure. You can do it. Further, in this backup roll shift device 1, after the table 3 is installed in the mill housing MH as described later, only the carriage 2 can be carried out from the mill housing MH. In addition, the symbol R in the figure is
A ram latch that draws a work roll (not shown) interposed between the two backup rolls UB and LB into the mill housing and can reciprocate from the chain double-dashed line a to the chain double-dashed line b in FIG. As shown in, the claw portion T can be opened and closed. Further, hereinafter, in the front view, the right side in the drawing is the driving side and the left side in the drawing is the operating side.

As shown in FIG. 2, the trolley 2 cannot be so-called self-propelled only by attaching four wheels 22 to a rectangular frame 21, but the ram latch R allows traveling of the frame 21. On the front side, a claw portion 23 with which the ram latch R is engaged is projected. By doing so, it is not necessary to provide a self-propelled device on the trolley 2 side, and accordingly, the configuration can be simplified and the cost can be reduced. A lifting guide device 24 is provided at the front and rear of the frame 21, and the table 3 is mounted on the guide device 24.
A frame 25 for mounting is attached. A rack-and-pinion type rotation-reciprocating motion conversion mechanism 26 is provided at the lower center of each guide device 24. The two are connected by a propeller shaft 27 and further connected to a motor 28 provided at the rear end of the frame 21. ing. Then, the vertical rack shaft 29 of the rotation-reciprocating motion converting mechanism 26.
The upper end portion of is attached to the frame body 25. Therefore,
When the motor 28 is rotated, a pinion (not shown) in the rotation-reciprocating motion converting mechanism 26 rotates, and the rack shaft 29 meshing with the pinion reciprocates in the vertical direction.
Thereby, the frame body 25 guided by the lifting guide device 24
Moves up and down. This is the lifting device 4 for lifting the table 3.
Is. The wheels 22 are for running on rails (which are originally rails for putting work rolls in and out of the mill housing MH) 11 laid on the floor. Further, on both sides of the elevating guide device 24 in front of and behind the frame 21, connecting plates 19 having pin insertion holes 18 are formed so as to project upward, and the pins inserted in the pin insertion holes of the table 3 described later By inserting the pin 2 into the pin insertion hole 18 of the carriage 2, both, that is, the carriage 2 and the table 3 can be fixed integrally.

FIG. 3a shows a state in which the gantry 5 is placed in the upper half of the figure and a state in which the gantry 5 is removed in the lower half of the figure, but the entire table 3 can be placed on the bending block BB of the mill housing MH. As shown in FIG. 3, it is made of a flat plate with an opening in the center, and two reinforcing beams 31 are attached in the front-rear direction near the center of the lower surface of the plate. Is provided with ribs assembled in a grid pattern. Further, a stopper 32, which abuts on a bending block BB of the mill housing MH, is provided at the rear end of the lower surface of the table 3 so as to project downward. Further, on the lower surface of the table 3, when the table 3 is placed on the frame body 25 of the dolly 2, at a position facing the connecting plate 19,
Similarly, a connecting plate 49 having a pin insertion hole 48 formed therein
Is projected. Reference numeral 50 in the drawing is a screw hole for screwing and attaching an eyebolt for hanging the crane.

On the other hand, the two plate-like mounts 5 placed on the front side and the rear side of the table 3 are connected by two connecting arms (only one is shown in FIG. 3a) 33. Needle bearings 34 are attached to both ends of each gantry 5 in the width direction, and are rotated on rails 35 attached to the upper surface of the table 3. A cam follower 36 is provided at the center of the lower surface of each pedestal 5 so as to project along the inner side surface of a rail 37 provided on the table 3. Further, a ball screw nut 38 is attached to the lower surface of the gantry 5 on the rear side.
Ball screw 39 screwed to 8 and having its axis oriented in the front-rear direction
Are connected to a motor 40 provided at the rear end of the table 3. Therefore, when the motor 40 is rotated, the nut 38 that is screwed into the ball screw 39 tends to move in the axial direction of the ball screw 39 by the thrust of the screw. Front-back direction, that is, from the drive side to the operating side,
Or slide in the opposite direction. At this time, the moving direction of the gantry 5 is such that the cam follower 3 that rotates along the rail 37.
6, the weight of the mount 5 and the upper backup roll UB mounted on the mount 5 is received by the needle bearing 34 that rotates along the rail 35. This constitutes the slide device 6 of the gantry 5. A stopper block 41 with which the gantry 5 abuts is provided at the rearward moving end of the gantry 5.

Next, a method of replacing a rolling mill spindle using the backup roll shift device 1 will be described with reference to FIG. First, the elevating device 4 of the trolley 2 is lowered, the table 3 is placed on the frame 25 at the lower end, and the connecting plate 49 on the table 3 side and the trolley 2 side connecting plate are placed. Pin insertion holes 4 on both sides of 19
Pins (not shown) are inserted into 8, 8 and both are integrated, and in that state, an eyebolt is screwed into the screw hole 50, a rope is hung on the screw and the crane is hung by a crane, and the spindle S is replaced. Move to the rear of the machine, that is, the operating side. Then, the trolley 2 integrated with the table 3 is lowered to a predetermined position of the rail 11 laid on the operating side of the rolling mill. As shown in FIG. 4a, this predetermined position is the operating side moving end of the ram latch R, and in this state, the pin that integrates the carriage 2 and the table 3 is pulled out. The two mounts 5 on the table 3 are located at the front end in the sliding direction.

Next, as shown in FIG. 4b, the table 3 is lifted by the lifting device 4 of the carriage 2. This is trolley 2
Table 3 carried into the mill housing MH together with
This is to prevent interference with, for example, the bending block BB of the mill housing MH. For example, as shown in FIG. 5, when the table 3 is raised, there is no interference with the mill housing MH. Note that, in FIG. 5, the right half diagram and the left half diagram are illustrated assuming different rolling mills. Further, as shown in the figure, the stopper 32 protrudingly provided on the lower surface of the trolley 2 comes into contact with a part of the bending block BB.

Next, the claw portion T of the ram latch R is opened and closed to engage with the claw portion 23 of the trolley 2. In this state, the ram latch R is pulled to the driving side, and the table 3 is placed in a raised state. The trolley 2 is carried into the mill housing MH. Then, the stopper 32 protruding from the lower surface of the table 3 is provided.
Hits the bending block BB of the mill housing MH, so the carriage 2 is stopped at that position.

Next, as shown in FIG. 4d, when the lifting / lowering device 4 of the carriage 2 is lowered, the lower surface of the table 3 is, as shown in FIG. 6, the bending block BB of the mill housing MH.
At this point, the table 3 is placed on the bending block BB, only the lifting device 4 is lowered, and the table 3 and the carriage 2 are separated. Note that, in FIG. 6 as well, the right half diagram and the left half diagram are illustrated assuming different rolling mills. Alternatively, the table 3 may be directly placed on the bending block by a crane using a wire rope or a hanging tool for backup roll handling.

Next, as shown in FIG. 4e, when the lifting device 4 reaches the lower end, the ram latch R is moved to the operating side, and only the carriage 2 is carried out from the mill housing MH. Next, as shown in FIG. 4f, the claws T of the ram latch R are opened and closed to release the engagement with the claws 23 of the carriage 2, and then the ram latch R is released.
Only pull it to the drive side. Then, as shown in FIG.
An upper backup roll U is mounted on the mount 5 of the table 3.
B is lowered and placed, and the slide roll 6 slides the backup roll UB together with the gantry 5 from the drive side to the operation side, and shifts by a necessary amount such that the upper side of the spindle S is vacant. Then, the spindle S is separated from the drive system, pulled up and taken out, and a new spindle S is lowered from above, assembled and replaced.
In this state, as shown in FIG. 6, since a human path is formed below the table 3, an operator can enter there to perform maintenance and inspection of, for example, the inside of the mill housing MH and the spindle drive system. .

When all the work is completed, the upper backup roll UB is returned to the original position as shown in FIG.
Is carried into the mill housing MH in the same manner as in FIG. 4a,
After the table 3 is lifted by the lifting device 4, the carriage 2 may be carried out from the mill housing MH together with the table 3.
In the above-described embodiment, the table 3 is placed on the bending block BB of the mill housing MH by the elevating device mounted on the dolly. However, instead of the dolly, a stand that is self-supporting in the mill housing MH may be used. At this time, the backup roll shift device including the mounting table may be carried in by a crane and a wire rope. Further, the traveling of the carriage 2 is performed by the ram latch R, but a self-propelled device may be attached if necessary. Further, each drive system is generally based on an electric or hydraulic system, but it is desirable to allow manual operation together so as to avoid a trouble in the power supply system.

[0019]

As described above, according to the rolling mill spindle replacement method of the first aspect of the present invention and the backup roll shift device of the third aspect of the present invention, the rolling is performed after the work rolls are removed from the rolling mill. Inside the machine housing,
Install a table with a slidable mount, place the upper backup roll on the mount, slide the mount from the driving side to the operating side, shift the upper backup roll, and pull out the spindle upward. Since it was decided to take it out, it is not necessary to pull out the backup roll completely from the mill housing as in the past, and it is possible to reduce the time and labor by that amount, and it is not necessary to handle a heavy backup roll, which is dangerous. Anyone can easily replace the spindle.

According to the second aspect of the present invention, there is no need for the table to be self-supporting by placing the table on the bending block of the housing of the rolling mill. Accordingly, the spindle can be easily replaced, and the structure of the device used can be simplified. According to the backup roll shift device of the fourth aspect of the present invention,
Feed the table on which the table is placed into the mill housing, install the table in the mill housing using the lifting device, place the upper backup roll on the table, and slide the frame from the drive side to the operation side with the slide device. Since the upper backup roll is shifted by doing so, the upper part of the spindle can be emptied and the spindle can be pulled out upward. Since it is not necessary to handle a heavy-duty backup roll, the risk can be reduced and anyone can easily replace the spindle.

According to the backup roll shift device of the fifth aspect of the present invention, after the table is installed in the mill housing, the carriage constituting the mounting table can be carried out from the mill housing. After being carried out, for example, there is a human path through which an operator can enter, from which maintenance and inspection of the inside of the mill housing and the spindle drive system can be performed.

According to the sixth aspect of the present invention, the backup roll shifting device has a structure in which the trolley for transporting the work rolls travels the trolley, so that it is not necessary to provide a new traveling device on the trolley. Therefore, the structure is simplified, the cost is reduced, and it is easy to put into practical use.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a backup roll shift device used in a rolling mill spindle replacement method of the present invention, in which (a) is a plan view and (b) is a front view.

2A and 2B are configuration diagrams of a truck of the backup roll shift device shown in FIG. 1, in which FIG. 2A is a plan view and FIG.
(C) is a side view.

3A and 3B are configuration diagrams of a table of the backup roll shift device of FIG. 1, where FIG. 3A is a plan view and FIG. 3B is a front view.
(C) is a side view.

FIG. 4 is an explanatory view of a rolling mill spindle replacement method using the backup roll shift device of FIG. 1.

FIG. 5 is an explanatory view of the connection between the backup roll shift device and the mill housing in the rolling mill spindle replacement method of FIG.

FIG. 6 is an explanatory view of the connection between the backup roll shift device and the mill housing in the rolling mill spindle replacement method of FIG.

[Explanation of symbols]

1 is a backup roll shift device 2 is a dolly 3 is a table 4 is a lifting device 5 is a stand 6 is a slide device 11 is a rail 23 is a claw 32 is a stopper UB is the upper backup roll MH is a mill housing S is the spindle R is a ram latch

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidenori Sakaguchi 1-chome, Mizushima Kawasaki-dori, Kurashiki-shi, Okayama Prefecture (no address) Kawasaki Steel Co., Ltd. Mizushima Steel Works (72) Inventor, Hirofumi Iwasaki 1 Mizushima-kawasaki-dori, Kurashiki-shi, Okayama Prefecture (No.) Kawasaki Steel Co., Ltd. Mizushima Steel Works (56) Reference JP 61-132212 (JP, A) JP 7-284823 (JP, A) JP 60-115314 (JP, A) ) Japanese Patent Laid-Open No. 7-256317 (JP, A) Actual Development No. 6-54401 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 31/08 B21B 35/14

Claims (6)

(57) [Claims] 1. A method for replacing a spindle disposed on a driving side of a rolling mill, comprising removing a work roll from the rolling mill and then providing a table having a slidable mount in a housing of the rolling mill. The rolling mill spindle, which is characterized in that the upper backup roll is installed on the pedestal, the pedestal is slid from the driving side to the operating side to shift the upper backup roll, and the spindle is pulled out and taken out. method of exchange. 2. The rolling mill spindle replacement method according to claim 1, wherein the table is mounted on a bending block of a housing of the rolling mill. 3. A backup roll shift device used in the method for replacing a rolling mill spindle according to claim 1 or 2, wherein a table mountable in the mill housing and a pedestal on which an upper backup roll is mounted are operated from the drive side. A backup roll shift device comprising: a gantry slide device that shifts to the side. 4. A backup roll shift device used in the method for replacing a rolling mill spindle according to claim 1, comprising a table that can be installed in a mill housing, and a mounting table on which the table is mounted. Is equipped with a gantry slide device that shifts the gantry on which the upper backup roll is placed from the driving side to the operating side, and the pedestal is equipped with an elevating device for installing the table in the mill housing. Backup roll shift device. 5. A trolley as the mounting table, wherein the table can be carried out from the mill housing after being installed in the mill housing.
Backup roll shift device described in. 6. The backup roll shift device according to claim 5, wherein the carriage is driven by a ram latch for transporting work rolls.