JPS6120614A - Rearranging method of feed roller unit in thick plate rolling mill - Google Patents

Abstract

PURPOSE:To execute easily, safely abd efficiencly a rearrangement of a feed roller unit by utilizing a backup roll rearranging truck. CONSTITUTION:A receiving rack base 7 having a feed roller receiving rail 7a is installed in advance onto a backup roll rearranging truck 6. A lifting rail 4b is made to ascend, and the upper face level is made to coincide with a level of the rail 7a. A feed roller unit 3 is shifted and placed on the rail 7a from a lifting rail 4b, fixed by hooking a chain block 10 from a suspension piece of a header guide 8, and also a chain block 12 for a swing stop is hooked. The header guide 8 is made to ascend, the unit 3 is lifted, the truck is drawn out temporarily to the outside of a housing 2, drawn out onto the receiving rack base 7, a receiving base is set, and the truck 6 is charged into the housing 2. Subsequently, the header guide 8 is made to descend, the unit 3 is drawn out and placed onto the receiving base, and the truck 6 is drawn out to the outside of the housing 2.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for rearranging feed roller units in a plate rolling mill.

``New Technology'' As shown in Fig. 1, a support stand 2a is provided on the inner surface of the housing 2 on the entrance and exit sides of the plate rolling mill 10.
On the top, a feed roller unit 3 having, for example, three feed rollers 3a is fitted in its chock. The feed roller 3a is mounted on a hydraulic jack 4a at the upper end of the elevating rail frame 4.
It is supported on an elevating rail 4b which is provided so as to be movable up and down.

Conventionally, when the feed roller unit 3 is taken out of the rolling mill housing 2 for reassembly, a work roll and a backup roll (not shown) are first pulled out from inside the rolling mill housing 2.

Next, after removing the hood 5 provided on the rolling mill 1, the wire W is wound around the feed roller 3a, the wire W is hung on the crane hook F, and the hydraulic jack 4
a to lift the lifting rail 4b, thereby unfitting the feed roller unit 3 from the support base 2a in the housing 2, and then lifting the crane hook F.
is rolled up and the feed roller unit 3 is hung diagonally upward like a chain line.

The diagonally hanging feed roller unit 3 is leveled outside the rolling mill housing 2 and transported to the rolling yard.

In addition, when assembling into the repaired feed roller unit If rolling mill housing, it is performed in the reverse order of the above-mentioned removal operation.

[Problems to be Solved by the Invention] In the conventional recombination work of the feed roller unit described above, the crane hook cannot be positioned at the center of the feed roller unit, so the feed roller unit is suspended diagonally. , the work was unbalanced, difficult to handle with a crane, and dangerous 0 In addition, the feed roller unit is a heavy object weighing 50 tons, so the work must be done carefully when hanging the wire. Because it involved a lot of work, it required a large number of workers.

Furthermore, even the time taken to remove the hood 5 of the rolling mill is ``
It takes 4 to 8 hours, and the time required to reassemble one feed roller unit is as long as 60 hours, and there are problems such as extremely poor roll reassembly efficiency.

1. Means for Solving Problems 1 The present invention has been made to solve the various problems of the conventional rearranging work of feed roller units in such thick plate rolling mills, and an example of its implementation will be described below. Figures 2 to 5
This will be explained below based on figures A, B, C, and D.

In FIGS. 2 to 4, l is a plate rolling mill,
A feed roller unit 3 having, for example, three feed rollers 3a is fitted into its chock on a support stand 2a provided on the inner surface of the housing 2 on the entrance and exit sides of the rolling mill 1. ing.

The feed roller 3a in the feed roller unit 3 is provided with a hydraulic jack 4 at the upper end of the elevating rail frame 4.
It is supported on an elevating rail 4b which is provided so as to be movable up and down via a.

Reference numeral 6 denotes a back-up roll reassembly trolley after the work rolls and hack-up rolls have already been pulled out from the rolling mill housing 2 to the offline area. A receiving frame 7 having a feed roller receiving rail 7a is removably installed.

The upper surface level of this feed roller receiving rail 7a is
It is higher than the upper surface level of the elevating rail 4b of the elevating rail mount 4, and the elevating rail 4b is connected to the hydraulic jack 4.
When raised to the upper limit by a, that is, the support stand 2a in the housing 2 of the feed roller unit 3
When the feed roller receiving rail 7 is uncoupled from the
It is set so that the upper surface level of the lifting rail 4b can be made to match the upper surface level of the lifting rail 4b.

Hydraulic jacks 7b that operate in synchronization with the hydraulic jack 4a to raise and lower the elevating rail 4b are provided on the receiving pedestal 7 located at the lower part outside both ends of the feed roller receiving rail 7a. The hydraulic jack 7b on the side 7 may be provided on the side of the lifting rail frame 4. 8 is a header guide that is moved up and down by a balance cylinder (not shown) of the rolling Ill. A chain block 10 is suspended via a hanging piece 9.

As shown in FIG. 4, a feed roller unit drawer holder 11 is removably placed on the receiving pedestal 7 so as to straddle the feed roller receiving rail 7a.

``Operation'' When the feed roller unit 3 incorporated in the rolling mill housing 2 is to be reassembled, the method of taking out the feed roller unit 3 to be repaired from the rolling mill housing 2 is shown in FIG. 5A.

It is assumed that the work roll and the backup roll have already been pulled out offline from inside the rolling mill housing 2.As shown in FIG. 5A, A receiving pedestal 7 having a feed roller receiving rail 7a at the upper end is installed in advance off-line on the back-up roll reassembling cart 6, and the back-up roll recombining cart 6 on which this receiving pedestal 7 is installed is attached to the rolling mill housing. Assume that it is charged in 2.

Further, as shown in FIG. 5A, it is assumed that the feed roller unit 3 is fitted onto the support base 2a of the housing 2.

In the state shown in FIG. 5A, the hydraulic jack 4a on the lifting rail mount 4 side and the hydraulic jack 7b of the receiving pedestal 711411 are operated synchronously to raise the lifting rail 41) to the upper load limit, and as shown in FIG. 5B. As shown in FIG.
Match the upper surface level l of a.

Then, using the feed roller 38 of the feed roller unit 3 as a wheel, the feed roller unit 3
, from the lifting rail 4b to the feed roller receiving rail 7
Transfer to a (see Figure 5 C) 0 Figure 5 CV? : As shown, rolling and transferring the feed roller unit 3 from the lifting rail 4b to the feed roller receiving rail 7a means pulling out the feed roller unit 3 into the space inside the housing 2.

Then, the suspension piece 9 of the header guide 8 is attached to the feed roller unit 3 on the feed roller receiving rail 7a.
A chain block 10 suspended from the feed roller unit 3 is hung and fixed, and a chain block 12 for steadying is hung on the feed roller unit 3.

Next, the balance cylinder (not shown) of the rolling mill 1 is operated to raise the header guide 8, and as the header guide 8 is raised, the feed roller unit is moved through the chain block 10 as shown by the chain line in FIG. 5C. 3
is lifted, and at a height position where the inner width of the housing 2 becomes larger than the width of the feed roller unit 3, the lifting of the filter roller unit 3 is stopped 1~, and this state is maintained.

Then, the backup roll reassembly trolley 6 is once pulled out of the housing 2, and the feed roller unit drawer holder 11 is set on the receiving pedestal 7 using a crane so as to straddle the feed roller receiving rail 7a. , as shown, the backup roll recombination trolley 6 is inserted into the housing 2, and a balance cylinder (not shown) is operated to lower the header guide 8, thereby lowering the feed roller unit 3 and feeding o-9. - Place the feed roller unit 3 on the feed roller unit drawer holder 11.
0 from the feed roller unit 3 and the backup roll recombination trolley 6 is pulled out of the housing 2, the feed roller unit 3 can be pulled out of the housing 2.

In addition, when assembling the repaired feed roller unit 3 into the housing 2, it is sufficient to perform the above-mentioned pulling out operation in the reverse order.

"Effects of the Invention" As described above, according to the present invention, the feedflow to be repaired in a plate rolling mill, 4. Taking out the maggot puffer fish,
In order to assemble the repaired feed roller unit into the housing, a backup roll reassembly trolley can be used to easily, efficiently and safely do away with the conventional dangerous and inefficient wire hanging work and crane handling. The recombination time was shortened to 36 hours.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional method for rearranging feed roller units, FIG. 2 is a front view showing an embodiment of the rearrangement method of the present invention for feed roller units, FIG. 3 is a side view of a lifting rail mount, and FIG. The figure is a side view of the feed roller unit drawer pedestal, and FIGS. 5A, B, C, and I) are explanatory diagrams of the recombination method of the present invention for the feed roller unit. l...Thick plate rolling mill, 2...Housing, 3...Feed roller unit, 4...Elevating rail frame, 4
a... Hydraulic jack, 4b... Lifting rail, 6...
・Backup roll rearrangement trolley, 7... Receiving frame, 7a... Feed roller receiving rail, 7b...
Hydraulic jack, 8...Header guide, IO...Chain block, 11...Feed roller unit drawer cradle, 12°°゛Teen block No. 5 <C> CD)

Claims (1)

[Claims] After pulling the work rolls and backup rolls out of the plate rolling mill housing, a process of loading a backup roll reassembly trolley on which a receiving frame having a feed roller receiving rail at the upper end is mounted into the housing, and a supporting stand in the housing. Raising the feed roller unit fitted and installed above via the lifting rail on the lifting rail mount and unfitting it with the support base,
A step of aligning the top surface level of the lifting rail with the top surface level of the feed roller receiving rail, a step of rolling and transferring the feed roller unit from the lifting rail to the feed roller receiving rail, and a step of adjusting the height at which the feed roller unit can be pulled out from inside the housing. Samade chain block,
A step of lifting the carriage by a rolling mill balance cylinder via a header guide, and a step of once pulling out the cart out of the housing and placing a feed roller unit drawer pedestal, which is higher than the height of the feed roller receiving rail, on the pedestal pedestal. a step of reinserting the cart on which the feed roller unit drawer holder is placed into the housing; a step of placing the feed roller unit on the feed roller unit drawer holder; and a step of placing the feed roller unit on the feed roller unit drawer holder. A method for rearranging a feed roller unit in a plate rolling mill, comprising a series of drawing steps including a step of pulling out the mounted feed roller unit out of the housing together with a cart, and a series of assembling steps in which the series of drawing steps is reversed.