JPH0683850B2 - Roll changing device in rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a case where each roll of a multi-stage cluster rolling mill is incorporated into a conventional four-stage type mill housing, and work rolls, intermediate rolls, etc. are four-stage type. The present invention relates to a roll reassembling device having a versatile structure so that it can be reassembled like the above rolling mill.

<Prior Art> FIGS. 5 (a) and 5 (b) show an example of a work roll changing device of a conventional four-high rolling mill. In the figure, the two cylinders of the drive side mill housing 01 and the operation side mill housing 02 are respectively attached to the drive side cylinders.
Block 03a that can be moved up and down by 04a and operating cylinder 04b
(Drive side) 03b (Operating side) is installed. And
Between the driving side and operating side blocks 03a, 03b, one rail on the left and one rail on the left and right on the above housing 01, 02.
Are arranged. That is, rails 05 and 06 are cylinder 0
The work rolls are supported by 4a and 04b, and are arranged below the wheels of roll chocks 07 and 08 with wheels of work rolls.

When rearranging the work rolls 091 and 092 arranged above and below, first, as shown in FIG. 5B, an upper backup roll chock 01 that supports the upper backup roll 0152.
2 and the upper work roll chock 011 that rotatably supports the upper work roll 092 are lifted by the respective cylinders 014, 013 by a predetermined dimension, and then the cylinder 04a relating to the lower wheel chock 07, 08 supporting the lower work roll 091. , 0
4b is activated and the left and right rails 0 are passed through blocks 03a and 03b.
Lift 5,06 and apply rails 05,06 to the wheels of roll chock 07,08 with wheels, and then lift rails 05,06 together with roll chock 07,08 with wheels to lower backup roll 015.
The surface of the lower work roll 091 that is in contact with the surface of 1 is released, and the lifting of the rails 05 and 06 is stopped at the roll changing position. Thereafter, the upper work roll chock 011 is loaded on the lower work roll chock 07, 08 with the spacer S interposed therebetween. As a result, the rail 05 lifted by the cylinders 03a, 03b,
06 Roll chock with wheels 07,08 on top, work roll 0 on bottom
91, upper work roll chock 011 and upper work roll 092 will be placed.

Then, the rearrangement carriage 016 provided on the operation side and waiting is moved forward to the rolling mill side by the operation of the cylinder or the like (not shown),
The front end 016a of the rail provided on the carriage 016 is stopped and locked by abutting the end of the lifted rails 05 and 06. Therefore, the joint 010a on the tip of the piston of the cylinder 010 provided on the drive side is lifted to the joint 0 provided on the wheeled roll chock 07 on the rails 05 and 06.
Combined with 7a, actuating cylinder 010 to roll chock 0
7,08, lower work roll 091, upper work roll chock 01
1. The upper work rolls 092 are collectively moved to the operation side, and pushed out from the E position shown in FIG. 5 (a) to the F position shown by the chain line (on the rearrangement carriage 016) to move the upper and lower work rolls 092.
1,092 can be eliminated from the housing.

After the new work roll is reassembled, it is assembled into the housing by the procedure reverse to the above. That is, the roll chock 07,08 with a car theory is pulled into a predetermined position in the housing 01,02 by the operation of the cylinder 010, the spacer S is removed, and the cylinders 04a, 04b are operated to move the left and right rails 05,06 to the predetermined positions. Lower rail 05,06 and roll chock 07,08
The wheels are separated from each other, and the four rolls are brought into contact with each other in a rolled state to complete the rolling preparation.

<Problems to be Solved by the Invention> When a multi-stage cluster rolling mill is installed in the same mill housing as the above-described four-high rolling mill, a conventional four-high rolling mill provided in the mill housing as a rail for replacement. For rails 0
In 5,06, it cannot be installed smoothly because it interferes with intermediate rolls, reinforcing rolls, etc. and chocks of these rolls, and when changing the work rolls, intermediate rolls, etc. of the multi-stage cluster rolling machine, etc. There is a problem that it takes a lot of manpower and time.

Therefore, in view of the above-mentioned drawbacks, the present invention has an object to easily rearrange a multi-stage cluster rolling mill in the same housing as a four-high rolling mill.

<Means for Solving the Problems> The present invention that achieves the above-mentioned object is to provide a rail in a drive-side mill housing of a rolling mill that hits a wheel passing position by vertical movement of a roll chock with wheels that supports rolls. A notch is provided, and a movable rail that pivots around the pin as a fulcrum to open and close the notch by the operation of the cylinder is provided, and an auxiliary roll that supports the roll continuously to the movable rail is provided. It is characterized in that a fixed rail is arranged on the upper part of the roll chock, and a rail which is connected to the operation-side reassembling carriage in the same plane as the fixed rail is connected.

<Operation> The above configuration can be applied not only to the four-high rolling mill but also to the multi-high rolling mill, and a recombining device having the same structure can be provided.

<Example> An example of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIG. 3, a pair of upper and lower work rolls R sandwiching the rolled material P are roll chocks Ra and R, respectively.
Two upper and lower intermediate rolls 1 rotatably supported by b and supporting the pair of upper and lower work rolls R.
Are rotatably supported by the lower roll chock 3a and the upper roll chock 3b with wheels 4a, 4b. Further, a plurality of split-type reinforcing rolls 2 which are vertically symmetrically arranged so as to press the work roll R via the intermediate roll 1 are rotatably supported by roll chocks 11a and 11b, and are provided on the drive side housing 5 and the operation side housing. 6 are arranged so as to be vertically movable.

When laying the rails for pushing out the rolls outside the machine, first, fixed rails 7 whose upper surfaces are flush with the upper surfaces of the rails on the reassembling carriage 10 are provided inside the drive-side housing 5. The fixed rail 7 is partially notched at a position where the wheel 4a of the lower roll chock 3a with wheels passes when moving up and down in the housing 5, and the notched portion 7a can be freely opened and closed with a pin 8a as a fulcrum by a cylinder 8b or the like. It has a movable opening / closing rail 8. Further, rails 9 are provided on both sides of the upper portion of the lower reinforcing roll chock 11a in contact with the fixed rail 7, and the ends of the rail 9 do not hinder the wheel 4a of the roll chock 3a with wheels from moving up and down in the operation side housing 6. It is the length to the position. In the figure, 12 is a cylinder for moving the lower roll chock 3a up and down, 13 and 16 are spacers, 1
Reference numeral 4 is a cylinder for moving up and down the upper roll chock 3b, and 15 is a cylinder for moving up and down the upper roll chock 11b.

Here, the order of the reassembling work from the rolling shown in FIG. 3A to the roll reassembling shown in FIG. 3B using the rails 7 and 9 will be described.

A spacer 13 is inserted between the upper and lower work roll chocks Ra and Rb.

The upper reinforcing roll chock 11b is lifted by the cylinder 15 and the upper intermediate roll chock 3b is lifted by the cylinder 14 from the housings 5, 6 by a predetermined distance.
And the upper intermediate roll 1 abutting against this are separated. When the upper intermediate roll chock 3b is recombined, the spacer 16 is inserted onto the lower intermediate roll chock 3a after the work roll is drawn out, and the upper intermediate roll chock 3b is inserted thereon.
Is lowered by the cylinder 14.

The lower intermediate roll chock 3a with wheels is lifted by the cylinder 12 from the lower reinforced roll chock 11a to a predetermined rearrangement position.

The open / close rail 8 is rotated from the dotted line position to the chain line position by the cylinder 8b with the pin 8a serving as a fulcrum on the fixed rail 7 to close the cutout portion 7a of the fixed rail 7 so that the rail upper surface is flush with the fixed rail 7. To do.

On the operating side of the rolling mill, the reassembling carriage 10 on standby is moved and fixed to a predetermined position where it abuts against the end of the rail 9 by a cylinder (not shown) or the like. At this time, the tip end portion of the conventional reassembling trolley shown in FIG. 5 is extended to a position where it abuts on the rail 9 as shown in FIG. There is a need to.

The lower intermediate roll chock 3a with wheels is lowered by the cylinder 12 to lower the wheels 4a onto the rails 7, 9, 10.

As in the conventional example shown in FIG. 5, the lower intermediate roll chock 3a with wheels is operated from the inside of the housings 5 and 6 by using the fixed rail 7, the rail 9, and the rail on the reassembling carriage 10 by the operation of the cylinder provided on the drive side. It is moved and positioned at a predetermined position on the reassembling carriage 10 on the operating side. Thus, the lower intermediate roll chock 3a with wheels is moved and fixed to a predetermined position on the reassembling cart 10.
The upper and lower work rolls R or the intermediate rolls 1, which are supported and loaded on the upper and lower sides, are replaced by old and new. After the reassembling, the roll chocks with wheels 3b and 3a are drawn into predetermined positions in the housings 5 and 6 by the operation of a cylinder (not shown) in the reverse order of the above, and the rolling chocks shown in FIG. Put the rolls into contact with each other, and assemble them.
The opening / closing rail 8 is rotated from the dotted line position to the chain line position with the pin 8a as a fulcrum by the operation of 8b, and the notch portion 7a is opened so that the wheel 4a of the intermediate roll chock 3b can pass through a part of the fixed rail 7. In this way, the rolls are set to be exchanged and rearranged.

Next, to explain the reassembling of the four-high rolling mill, as shown in FIG. 4, the upper and lower work rolls 1 are the main ones, and the difference from the multi-high cluster type is that the upper part of the lower reinforcing roll chock 11a is different. The rail 9a is provided, and this rail 9a is also used as the separator of the lower reinforcing roll chock 11a.

The rearrangement procedure will be described.

As shown in Fig. 4 (b), the upper reinforcing roll chock 11
b by cylinder 15 or upper work roll chock 3c
Cylinder 14 lifts the protrusions of housings 5 and 6 by a predetermined distance, and further lower roll chock 3a with wheels is lifted by cylinder 12 from lower reinforcing roll chock 11a to a predetermined rearrangement position, and upper and lower work roll chocks 3a, 3c.
A spacer S is inserted between them to separate the upper and lower work rolls 1 and the reinforcing roll 2 which are in contact with each other during rolling shown in FIG. 4 (b).

Similar to the multi-stage cluster system, the opening / closing rail 8 rotatably incorporated into the fixed rail 7 mounted on the housing 5 by the cylinder 8b is rotated to close the notch 7a so that the upper surface of the rail is flush with the fixed rail 7. . Subsequently, the rearrangement carriage 10 is moved and fixed by a cylinder or the like to a predetermined position where it comes into contact with the end of the rail 9a shown in FIG. 4 (c).

Next, the cylinder 12 is operated to lower the work roll chock 3a with wheels, on which the upper work roll chock 3c is loaded via the spacer S, and lower the wheels 4 onto a continuous fixed rail.

In this way, the work roll 1 on the reassembling carriage 10 extruded to the predetermined position on the operating side is exchanged and changed in the same procedure as the multi-stage cluster type, and after the change, the work rolls 1 are pulled to the predetermined positions in the housings 5 and 6 in the reverse procedure. Insert and turn the open / close rail 8 to rotate the fixed rail 7
The notch 7a is opened, and each roll is brought into contact with the state during rolling shown in FIG. 4 (a) so that the replacement work of the upper and lower work rolls is completed.

<Effects of the Invention> As described above, according to the present invention, when the work rolls or intermediate rolls of a multi-stage cluster rolling mill including a mill housing similar to the mill housing of the conventional four-high rolling mill are recombined, The 4-stage type work roll changeover and the multistage cluster type work roll changeover or intermediate roll changeover can be easily combined in the same changeover apparatus, and the working time is greatly shortened, so that the operating rate is improved. Further, it can be used as a combination in which the four-stage type and the multi-stage cluster type are combined by using the same mill housing, and a great effect that a work roll diameter and a mill type suitable for a rolling mill can be selected can be obtained. .

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a plan view, FIG. 2 (a) is a view taken along the line AA of FIG. 1, and FIG. 2 (a) BB line arrow view, FIG. 3 (a)
Is a roll position state diagram during rolling, FIG. 3 (b) is a roll position state diagram during reassembling, FIG. 4 is a four-high rolling mill, and FIG. 4 (a) is a roll position state diagram during rolling, FIG. 4 (b) is a roll position state diagram at the time of rearrangement, and FIG. 4 (c) is FIG. 4 (b).
5 is a plan view and FIG. 5 (b) is a side view. FIG. 5 (a) is a plan view and FIG. 5 (b) is a side view. In the figure, R is a work roll, 1 is an intermediate roll, 2 is a reinforcing roll, 4,4a, 4b are wheels, 5,6 are housings, 7 is a rail, 7a is a notch, 8 is a movable rail, and 8b is a cylinder. , 9 is a fixed rail, and 10 is a rearrangement truck.

Front page continued (72) Inventor Harumasa Muramoto 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works (56) References JP, Y2)

Claims (1)

[Claims] 1. A notch is provided in a rail which is located in a drive side mill housing of a rolling mill and which comes into contact with a wheel through a vertical movement of a roll chock with wheels for supporting rolls, and a cylinder is operated by using a pin as a fulcrum. A movable rail that rotates so as to open and close the notch is provided, and a fixed rail is arranged above the roll chock of the auxiliary roll that supports the roll continuously to the movable rail. A roll reassembling device for a rolling mill, wherein rails that are connected to each other on the same plane as the fixed rails are arranged on a reassembling carriage.