JPS6353887B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vertical roll stand (hereinafter referred to as a vertical stand) supported by a trolley on a rolling line.
and horizontal roll stands (hereinafter referred to as horizontal stands) are placed alternately along the rolling line direction, and the vertical roll stand and the horizontal roll stand are provided so as to be able to be pulled out from the cart. Regarding.

Conventionally, roll replacement in the above-mentioned continuous rolling mill is carried out by moving the continuous rolling mill 1 to a standby position 2 after the rolling of the continuous rolling mill 1 on the rolling line is completed, as shown in FIG. A first preliminary rolling mill 3 is installed in a rolling line, and the continuous rolling mill that is on standby at the standby position 2 is moved to the standby position of the first preliminary rolling mill 3', and the rolls are rearranged. To rearrange the rolls, the vertical stand 1V is pulled out from the carriage of the rolling mill main body to the vertical stand guide attachment/removal position 4 by the pull-out device 11, and then the guides are removed using an overhead crane. Thereafter, the vertical stand 1V is further pulled out to the level of the vertical roll rearrangement work frame 7, and then one vertical roll is lifted up using an overhead crane and placed on the tipping machine 9. The overhead crane suspends the replacement roll temporarily placed on the vertical roll temporary storage frame 8 and inserts the roll into the extracted vertical stand 1V. The rolls on the overturning machine 9 are transported to a roll storage area by another overhead crane. By repeating the work starting from unloading the remaining vertical rolls once, the roll replacement for one vertical stand is completed. The operation of returning the vertical stand 1V to the stand setup truck 3 can be carried out in the reverse order.

Regarding the horizontal stand, the horizontal stand is pulled out by the stand pull-out device 12, and the guides are removed at the horizontal stand guide attachment/removal position 5. In this case, an overhead crane will also be used. Thereafter, the horizontal roll is pulled out by the roll pull-out device 12-1, and this roll is replaced with the roll in the spare roll storage area by the overhead crane. The horizontal stand 1H can be set up in the reverse order.

However, when using the conventional method as described above, that is, the method of changing rolls using an overhead crane, all operations are performed in series.

On the other hand, the rolls of a rolling mill must be changed quickly in order to roll the slabs continuously sent from the continuous casting machine into various sizes required by customers.

However, in order to quickly perform frequent roll change operations, the number of overhead cranes must be increased, the roll change area must be expanded, and in some cases, a new 3' pre-rolling mill must be installed as shown in Figure 1. There was a problem in that the number of preliminary rolling mills had to be increased, and the number of workers had to be increased to carry out parallel work.

The present invention has been made in view of the above, and an object of the present invention is to provide a roll changing method for a continuous rolling mill that solves the above problems.

The present invention will be explained below with reference to Examples.

FIGS. 2 and 3 are a plan view and a side view of a roll changing shop of a rolling mill for explaining an embodiment to which the method of the present invention is applied.

1 is a continuous rolling mill installed on a rolling line, and the continuous rolling mill 1 has a vertical stand 1V equipped with wheels for transportation at the bottom and a horizontal stand 1H equipped with wheels for transportation at the bottom alternately. The rolling operation is carried out with the entire body placed on the trolley 22 for stand replacement, and the guide body is assembled to the guide frames of the vertical stand 1V and horizontal stand 1H, and the guide frames are replaced. It is made into a cassette so that the guide can be replaced by using the cassette. Note that 38 is a motor for a rolling mill.

The standby stand group 2 is placed on standby outside the rolling line in a position that does not interfere with the route for pulling out the rolled rolling mill 1 from the rolling line.
After being pulled out along the rails 30, it is moved to a predetermined position in the rolling line by the rails 31, changed direction by the rolling mill 33, and installed in the rolling line instead of the rolling mill 1.

On the other hand, when rolling of a predetermined size is completed and the rolls are replaced, the rolling mill 1 is pulled out from the rolling line while mounted on the carriage 22 along the rails 30 in a direction perpendicular to the rolling line. The rolled mill 1 is moved from the rolling yard A to a position 13-1 in the roll shop B. The rolling mill 1 that has been moved to the position 13-1 is located at the guide attachment/removal location 1 of the vertical stand 10 at the position 13-1.
4-1 using a pushing device 19-1 such as a self-propelled towing vehicle located underground. In this case, position 1
The rail 34 that guides the wheels of the vertical stand 1V of the rolling mill 1 in 3-1 corresponds to the rail 35 for the vertical stand 1V on the cart 12, and the rail 34 guides the wheels of the vertical stand 1V of the rolling mill 1.
It is provided up to the turning machine 15 of the V, and is moved on this rail 34 to the guide attachment/removal location 14-1. Also, at position 13-1 is a rolling yard A.
A transfer machine similar to that installed in (not shown)
is provided, and the rolling mill 1 from which the vertical stand 1V has been removed is moved together with the carriage 12 parallel to the rolling line to a position 13-2. Position 13-
2 and the rail 3 that guides the wheels of the horizontal stand 1H to the position of the horizontal roll exchange cart 16-2.
6 is the rail 37 for the horizontal stand 1H on the trolley 12
It has been set up correspondingly. The horizontal stand 1H from the rolling mill 1, which has been moved to the position 13-2, is pushed along the rail 36 to the guide attachment/removal location 14-2 by a pushing device 19-2 such as a self-propelled tractor located underground. It's crowded. Here, the pulled-out state of the vertical stand 1V and the horizontal stand 1H by the pull-out devices 19-1 and 19-2 is, for example, the horizontal stand 1H.
An example of this is shown in FIG.

Here, vertical stand 1V group and horizontal stand 1H
Guide installation/removal location separate from group 14-1, 1
The reason for the rolling mill 1 is that the distance P between the vertical stand 1V and the horizontal stand 1H is significantly shortened compared to the conventional continuous rolling mill, as shown in Fig. 5, due to the high density of the rolling mill 1. and roll shop B
In order to secure work space within the interior, as shown in Fig. 6, every other stand is spaced 2P apart, so that the vertical stand 1V can be installed at the guide attachment/removal location 14-1 of the vertical stand 1V. At the interval 2P, also at the guide attachment/removal position 14-2 of the horizontal stand 1H, the horizontal stand 1
H are positioned at an interval of 2P, and work space for installing and removing guides, etc. can be secured. Also, by collecting stands of the same type, such as vertical stand 1V group and horizontal stand 1H group,
This is because roll replacement work and roll replacement equipment can be consolidated.

Therefore, guide installation and removal locations 14-1, 14-
In order to replace the cassetted guides described above in Section 2, a guide replacement device such as a lift-only machine such as a sheave crane 20 or a portal crane may be placed before and after each stand, and the guide installation and removal work can be carried out. FIG. 2 and FIG. 6 show examples in which the shive grains 20 are arranged.

Next, replacement of the rolls in the horizontal stand 1H and the rolls in the vertical stand 1V from which the guides have been removed will be explained.

First of all, regarding the roll in horizontal stand 1H,
A pull-out device 18-2 for loading and unloading rolls in the horizontal stand 1H is placed between the roll traversing carts 16-2 on which the replacement rolls 17-2 are placed,
The drawer device 1 is placed so as to face the inner roll.
After the used rolls in the horizontal stand 1H are pulled out by 8-2, the roll core of the replacement roll 7-2 placed on the roll traversing trolley 16-2 is aligned with the roll core in the horizontal stand 1H. the exchange roll 17-2 to the pull-out device 1.
8-2 to insert and assemble.

Next, regarding the roll in the vertical stand 1V, the vertical stand 1V from which the guides have been removed at the guide installation/removal location 14-1 is moved to the position of the turning machine 15 and turned 90 degrees as shown in Fig. 3. Then, position the roll in the vertical stand 1V horizontally. The turning machine 15 may be a conventional turning machine. Rotated vertical stand 1V
Replacing the rolls inside is the same as replacing the rolls inside the horizontal stand 1H. That is, the pull-out device 18-1 for loading and unloading the rolls is arranged so as to face the rolls in the vertical stand 1V across the roll-traversing trolley 16-1 on which the replacement rolls 17-1 are mounted,
After the used rolls in the vertical stand 1V are pulled out by the pull-out device 18-1, the roll traversing cart 16-
1 placed thereon so that the roll core of the replacement roll 17-1 is aligned with the roll core in the vertical stand 1V, and the replacement roll 17-1 is inserted and assembled using the pull-out device 18-1. good. In this case, each time the roll in the vertical stand 1V is replaced, the turning machine 15 is moved to a position opposite to another adjacent vertical stand 1V, and the vertical stand 1V is turned to replace the rolls one after another. Only one unit is required.

Furthermore, if a turning machine 15 is provided corresponding to each vertical stand 1V as shown in FIG. 7, there is no need to move the turning machine 15 in the direction of the rolling line.
5 needs to be installed in equal numbers to the number of vertical stands 1V.

In addition, stand groups 1H and 1 incorporating replacement rolls
The steps described above can be performed in reverse until V is set up.

When the method of the present invention is applied as explained above,
It is not necessary to use an overhead crane to change rolls, and rolls can be changed. The overhead crane is only used for transporting replacement rolls, used rolls, and guides, and the method of the present invention minimizes the number of spare stands, the number of overhead cranes, and the work space.

Comparing the effect obtained by the method of the present invention with the conventional method in terms of the time required to complete setting of replacement rolls, the roll replacement time according to the method of the present invention in the case of a vertical stand of 1V and a horizontal stand of 1H and 6 stands is shown in Figure 8. As shown in Figure 2, the present invention takes about 1/2 the time compared to when using a conventional overhead crane. In FIG. 8, the upper half shows an example in which rolls are exchanged using an overhead crane stand as shown in FIG. 1, and the lower half shows an example in which the method of the present invention is applied.

This means that the rolling size cycle can be carried out in smaller increments, meaning that the continuously cast slab can be subdivided into smaller lots on the rolling side.

If this is carried out using the conventional method, as mentioned above, it will take twice as long to set up the rolls as when the method of the present invention is applied, and the rolling size cycle will be more restricted.

Therefore, when trying to make the roll set-up time according to the conventional example equivalent to the roll set-up time according to the method of the present invention, it is necessary to have two reserve stand groups 3 and 3' as shown in FIG.
It is necessary to work at two locations in parallel, which increases the complexity of the work, increases the number of cranes to handle, increases the number of overhead cranes, increases the number of spare stands, and increases the need for roll shop space.

[Brief explanation of the drawing]

FIG. 1 is a roll shop layout diagram for explaining roll exchange using an overhead crane. FIGS. 2 and 3 are a plan view and a side view of a roll shop for explaining one embodiment to which the method of the present invention is applied.
FIG. 4 is an explanatory diagram of how the horizontal stand is pulled out by the pull-out device shown in FIG. 2. FIG. 5 is a layout diagram of a horizontal stand group and a vertical stand group on the rolling line. FIG. 6 is a layout diagram of the horizontal stand and the vertical stand at the guide installation/removal location. FIG. 7 is a plan view of a roll shop for explaining another embodiment to which the method of the present invention is applied. FIG. 8 is a comparison diagram of the setup time of a conventional stand and the setup time of a stand to which the method of the present invention is applied. 1...Rolling mill, 1V...Vertical stand, 1V...
...Horizontal stand, 13-1 and 13-2... Vertical stand pull-out position and horizontal stand pull-out position, 14-1 and 14-2... Vertical stand guide and horizontal stand guide installation/removal position, 15... Turning machine , 16-1 and 16-
2... Roll transverse trolley, 17-1 and 17-2
...exchange roll, 18-1 and 18-2...drawer device, 19-1 and 19-2...drawer device,
20...Sibgrain, 22...Dolly.

Claims (1)

[Claims] 1. A horizontal rolling mill in which vertical roll stands with wheels for movement at the bottom and horizontal roll stands with wheels for movement at the bottom are arranged alternately, and the entire stand is placed on a trolley for stand replacement. When exchanging rolls and vertical rolls, the cart is pulled out in a direction perpendicular to the rolling line direction to pull out the vertical roll stand, and then the cart with the vertical roll stand pulled out is moved in the rolling line direction to replace the horizontal roll stand with the vertical roll stand. Remove the accessories, including the roll guide, from the vertical roll stand and horizontal roll stand using a specialized lifting machine.
After turning the vertical roll stand approximately 90 degrees using the vertical stand turning machine placed on the opposite side of the cart across the roll guide removal position of the vertical roll stand and positioning the roll of the vertical roll stand almost horizontally, the vertical roll is removed. A method for replacing rolls in a continuous rolling mill, characterized by replacing rolls on a stand and replacing rolls on a horizontal roll stand at a roll guide removal position.