JPS5927927Y2 - Backup roll reconfiguration jig - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a backup roll changing jig for a quadruple rolling mill.

Conventionally, backup rolls have been reassembled using a reassembly jig such as a C-hook, or by a so-called thread method using a cylinder operation.

In the case of the thread method, roll reshuffling is generally performed by inserting a reshuffling jig between the upper and lower backup roll chocks and installing it to maintain the roll spacing. The following methods are used to remove the material from the rolling mill.

For example, there is a method in which a recombination jig is placed on a lower back-up roll chock and inserted and removed using a roll recombination cylinder.

However, in this case, there is a drawback that the heavy object must be moved frequently.

Another method uses a recombination jig shown in FIGS. 1 and 2.

This recombination jig has a jig main body 1 equipped with wheels 3 that roll on rails 2, an adjustment liner 4, and a keeper plate 5 for positioning the roll in the axial direction. After inserting into the rolling mill using the rearrangement rail and bushings, lower the rail using the rail lift cylinder,
Place the recombination jig on the lower backup roll chock,
After this, the work rolls are removed using rails and pushers for rearranging the work rolls.

However, in this case, it is necessary to replace the adjustment liner 4 and keeper plate 5 as appropriate due to the relationship between the stroke limit of the rail lift cylinder and the roll diameter, which has the disadvantage that the replacement work is troublesome and takes a long time. .

Moreover, it cannot be used if the rail is fixed or if there are problems with connecting it to other equipment during remodeling.

The present invention was developed in view of the above circumstances, and its purpose is to provide a backup roll changing jig that can easily and quickly change the backup rolls regardless of the roll diameter of the rolling mill. be.

That is, the present invention provides a backup roll reassignment system in which a jig main body is provided with wheels for transferring work roll reshuffling rails, a wheel bearing that is guided by the main body so as to be movable up and down, and an elevating drive device that drives the bearing. It is a jig.

Embodiments of the present invention will be described below with reference to the drawings.

3 to 5 show the backup roll changing jig inserted into the rolling mill, in which 11 is the housing of the rolling mill, 12 is the lower back up roll, 13 is the lower back up roll chock, and 14 is the upper back up roll. Up roll, 15
1 is an upper backup roll chock, and 16 is a rail for changing work rolls.

Further, 17 is a pusher for loading and unloading work rolls (not shown) and recombination jigs.

The above-mentioned recombination jig is provided with a roll mounting section 19 on the upper part of the jig main body 18, and wheels 20 on the lower part.
... are provided, and these wheels 20 roll on the work roll changing rails 16.

Furthermore, the bearing 22 of the wheel 20 is provided so as to be movable up and down along a lifting guide 23 attached to the jig main body 18, and this bearing 22 is connected to a jack 24.

This jack 24 is connected to a connecting rod 26 which is supported by a bearing 22.
The jack 24 moves up and down by the rotation of the connecting rod 26.

This connecting rod 26 is connected to a sprocket 27 as shown in FIG.
and is connected to a drive shaft of an electric motor 29 via a chain 28.

Further, a slip clutch 30 is interposed on this drive shaft.

Furthermore, a guide 31 is attached to the side surface of the jig body 18, and this guide 31 is inserted between the housing liner 32 and the work roll chock clamp 33, and guides the jig body 18 when going up and down. .

In FIG. 3, 34 is a stopper for preventing overload of the jack 24, and 35 is a scale plate for detecting the amount of elevation of the jig main body 18.

Next, a method of using the recombination jig having the above structure will be explained.

First, a work roll changing trolley (not shown) waits on the work side of the rolling mill with work rolls (not shown) in the pusher 17.
By pushing upward and then pulling the recombination jig according to the present invention placed on the work roll recombination truck into the rolling mill using the pushers 17, the wheels 20 move on the work roll recombination rails 16. The recombination jig is inserted into a predetermined position of the rolling mill.

When the electric motor 29 is driven, the jack 24 is actuated via the chain 28, sprocket 27, and connecting rod 26, and the wheel bearing 22 connected to the jack 24 rises along the lifting guide 23.

In this case, since the jig main body 18 is supported by the wheels 20, the jig main body 18 is relatively lowered by a desired amount due to the rise of the wheel bearings 22, and as shown by the two-dot chain line in FIG. It rests on roll chock 13.

Further, in the jig main body 18, the guide 31 is connected to the housing liner 3.
2 and the work roll chock clamp 33, it can be fitted with the upper and lower backup roll chocks 15 and 13 without shifting during elevation.

Furthermore, this recombination jig is provided with a stopper 34 and is structured to be disconnected from the electric motor 29 by a slip clutch 30, so that no overload is applied to the jack 24 at the upper and lower limits.

Further, since the scale plate 35 is provided, even if the amount of elevation of the jig main body 18 differs depending on the roll diameter, the position can be known.

When the jig main body 18 is placed on the lower back up roll chock 13 and the wheels 20 are separated from the work roll rearrangement rail 16, the electric motor 29 is stopped, and then the back up roll balance cylinder (not shown) is opened to move up the upper back up. When the up roll 12 is lowered, the upper backup roll chock 15 is placed on the roll mounting portion 19 of the jig main body 18.

In this state, use a reassembly cylinder (not shown) or the like to pull it out of the rolling mill.

When new upper and lower backup rolls are to be installed, they are installed in the rolling mill by performing an operation that is completely opposite to the above-described pulling operation.

As explained above, according to the present invention, an elevating drive device such as an electric motor or jack is provided so that the recombination jig itself can be moved up and down by a desired amount by itself, so even if the roll diameter etc. The backup rolls can be rearranged simply, quickly and safely by adjusting as appropriate, and the structure is extremely simple, resulting in remarkable effects.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional backup roll changing jig.
Fig. 2 is a side view of the same jig, Fig. 3 is a side view of a backup roll recombination jig showing one embodiment of the present invention, Fig. 4 is a front view of the same jig, and Fig. 5 is the same as Fig. 4. It is a cross-sectional view along the line ■-■. 12... lower back up roll, 13...
・・Lower Backpack Prowl Chock, 14・・・・・・
Upper backup roll, 15... Upper backup roll chock, 16... Work roll rearrangement rail, 17... Button, 18...
・Jig body, 20...Wheel, 22...
Wheel bearing, 23... Lifting guide, 24...
... Jacket, 26 ... Connecting rod, 27 ...
...Sprocket, 28...Chain, 29.
·····Electric motor.

Claims (1)

[Scope of utility model registration request] A backup roll reassignment jig comprising a jig main body, a work roll reshuffling rail transfer wheel, a wheel bearing that is guided by the main body so as to be movable up and down, and an elevating drive device that drives the bearing.