JPS5927703A - Continuous hot rolling device of steel strip - Google Patents

Abstract

PURPOSE:To provide a continuous hot rolling device for steel strips which provides a higher yield, less unit of roll, higher operating efficiency, etc. by providing small-sized accmulators between a rolling device and a pretreatment device as well as a post treatment device respectively and decreasing the rolling speed of the rolling device while the above-mentioned two treatment devices are in operation. CONSTITUTION:The rolling speed of a rolling device 27 during the preparation for coiling and the preparation for removing in a coiler 29 and during the removing of the coil with a coil car 30 in decreased and a small-sized accumulator 31b is disposed behind the device 27, whereby the operation of the shearing device 24 of a post treatment device is made easly. A pair of the coiler 29 and the coil car 30 can be further provided and the continuous operation of the device 27 is made possible. The rolling speed in the stage of welding, in the stage of the passage of the welded part through the rolling device, in the stage of preparation for the coiling with the coiler is decreased to <=100m/sec so that the welder of a small installation area and simple construction and the small- sized accumulator are installed.

Description

Detailed Description of the Invention The present invention provides a continuous steel strip that continuously rolls copper strips by installing a pre-processing device such as a copper strip connecting device and a post-processing device such as a cutting device before and after a rolling device. This relates to rolling equipment.

An example of a conventional continuous steel strip rolling machine is shown in FIG. (4) is a steel strip shape straightening device that corrects the shape of the copper strip that is being rewound. The shear device (5) is a welding device for connecting the rear end of the preceding coil to the tip of the succeeding coil, such as a flash knot welder flash trimmer, etc. A processing device is configured. (6)
is an accumulator device for rolling the copper strip continuously without stopping, and is composed of a multi-stage loop car, a tension bridle, etc. for applying the tension necessary for threading and rolling the copper strip to the copper strip. , (7) is a copper strip cold rolling device that rolls the copper strip to a predetermined thickness;
Further, on the exit side, a shearing device (8), that is, a post-processing device, is installed to cut the copper strip rolled by the rolling device (7) into a predetermined length, and finally the copper strip is rolled to a predetermined thickness. a winder (9) that winds the winder, and a coil car 0 that takes out the winder (9).
0).

In addition, the other side of the conventional cold rolling apparatus for continuously rolling a single copper strip coil is shown in FIG.
) is a pre-processing device consisting of a threading preparation device 021 consisting of a coil opener, a tip straightening roll, a strip carrier, etc., a pinch roll (131), and a coil car (IIIK loaded unwinding machine (14)). The coil end is sent in by rotating the coil in the coil unwinding direction by the cradle roll (α), and is opened by the coil opener (121).
Vinci roll a with a mechanism that allows the upper roll to rise and fall
3 holds said trailing coil end 9, and in another coil car (11') K is loaded onto another unwinder (14') and rolled through pinch rolls (131). When the copper strip rolling of the preceding coil is completed, the succeeding coil end is dropped by a pinch reel (13), placed on the rolling line, and sent out. 70 The mechanism that interferes with the feeding is moved back to the drive side to continuously supply the subsequent copper strip to the rolling device (17), and further, the copper strip that is continuously fed is After being rolled to a predetermined thickness in a rolling machine 0η, it is wound around a winding root via a deflector roll (1 group) and taken out by a coil car (2 (1)).

The continuous steel strip rolling equipment vXc shown in FIG.
It has been proposed and put into practical use in Japanese Patent Publication No. 47-41667, and has been put into practical use. 1) Increase in production volume; 2)

This contributes to improved yields, 38 reductions in roll consumption, 4) and improved operating rates, etc., but the rolling equipment is also used to weld copper strips and connect them to subsequent steel strips. The principle is that the mechanism rolls at a constant speed without being decelerated.
Therefore, an extremely large-scale copper band accumulator of about 400 to 50,071 mm is required.

Large space required. (If the welding time is 1 minute, the speed of the belt at the entrance of the rolling mill is 300 m/min, and the allowance for work troubles is 100 to 200 m, the required accumulation amount of copper strip is = 1 minute x 3QQm/min + c10
0 to 2007i) = 400 to 500 m. )Also,
The welded parts are also required to be strong enough to withstand considerable rolling conditions.

As mentioned above 1. For reasons such as c, the rolling equipment shown in Figure 1 requires advanced functionality and a large amount of cost. It has the disadvantage that it is not suitable for modifying continuous steel strip rolling equipment using a single steel strip coil.

The present invention was developed in order to eliminate the above-mentioned drawbacks of conventional continuous steel strip rolling equipment, and is equipped with a trap pre-treatment device and a post-treatment device before and after the rolling device to continuously improve the value. In a continuous steel strip rolling machine that rolls strips,
A small accumulator is disposed between the pre-processing device and the rolling device and between the rolling device and the post-processing device, and when the pre-processing device and the post-processing device are operated, i.
The object of the present invention is to provide a configuration for reducing the rolling speed of the rolling device.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 shows an embodiment of the present invention, in which Qυ is a coil car, (21') is another coil car,
(2 dark coil car CI! Rewinding machine on IJ side, (22')
(B) is another unwinding machine, and (B) is a pre-processing device, which includes a threading preparation device (23) consisting of a coil opener, a tip straightening roll, a strip carrier, etc., and a shearing device (23) for fP4 band.
20, the welded part of the copper strip ai (2s etc.), and the vinyl roll (2s).
6α), and the sheet threading preparation device (231 is a coil end that is rotated in the unwinding direction by a crate 9 roll (α) from the steel sheet coil loaded onto the unwinding Me (231) by the coil car Qυ. is opened with a coil opener, straightened with a tip straightening roll, and held with a strip carrier, and the shearing device (24) feeds the subsequent coil end (tip side) from the unwinding machine (22') side. □The coil end (rear end side) of the preceding coil that has been inserted and rolled is trimmed by cutting off the off-gauge parts and the parts with poor shape so that the next welding connection can be made well, and then the welding equipment (2 fields, Migwelda (engineering nn)
grt Crag 5hield, Mgtal fi
-rcWalding) and soft plasma to flatten the raised part after welding.For example, the unwinding machine G! The rear end of the coil on the opposite side is connected by welding.

Furthermore, a small accumulator (3
A pinch roll (2gl) is installed between the rolling device (2gl
6h) and a small accumulator (31) with a simple structure are installed, and the shear device is equipped with a winding machine QJ and a coil car 〇 (η) connected in a 1m order.

In a continuous steel strip rolling machine equipped with various types of 1@ machine arrangement according to the above-described embodiments, the copper strip that has undergone the necessary pretreatment in the input side equipment is sent to the rolling machine (271) and rolled to a predetermined thickness. However, it is rolled to the same thickness.

In this case, due to the installation area, the welding part is Migwell instead of the original flash knot. - Since simple wells such as The influencing factors are the speed and load when the welded part passes through the rolling device, and among them, the speed has a large influence.

Therefore, in the present invention, by lowering the rolling speed during welding and when passing through the welded portion, it is possible to employ a well with a simple structure and a small accumulator with a small sugar area. A specific example will be explained below.

Generally, when passing through a welded part, it is advantageous to operate the rolling machine (271) without reducing the speed unless the copper strip breaks, but if there is a possibility of breakage, the rolling speed should be reduced. This can be dealt with by lowering it.

In addition, when it is not possible to deal with breakage by reducing the speed alone, such as when rolling a thin steel strip, it is possible to cope with the breakage by further opening the rolls of the rolling mill and reducing the rolling load. For this reason, the passing speed when passing through the welded part is set at 100 per minute.
When it is less than m, breakage of the welded portion can be prevented and a well with a simple structure can be used. Furthermore, by lowering the rolling speed during welding, the capacity of the copper strip accumulator can be reduced, and a small accumulator with a simple structure can be obtained. Now let's assume that the rolling speed during welding is 3 per minute.
0m and the required welding time is 1 minute, it is sufficient to secure an accumulator meter with a length of about 50m, allowing for a margin, and a small accumulator that does not require a large installation area (3
1C31h) can be adopted.

In addition, in order to operate the rolling mill (271) continuously without interrupting the operation of the rolling mill (271), the conventional continuous type FF as shown in Fig. 1 is used for the rolling mill on the exit side.
A pair of coil take-out devices is required, which is also a factor that makes it difficult to modify the rolling mill into a continuous steel strip rolling mill using a single steel strip coil as shown in FIG.

In order to solve this problem, the present invention reduces the rolling speed during winding preparation and unloading preparation in the winder (29) and during coil unloading in the coil car 00), and also provides a compact The provision of the accumulator (31h) facilitates the operation of the shear device of the post-processing device (C), and also makes it possible to provide a pair of winding machine c219 and coil car pO), and also makes it possible to provide a pair of winding machine c219 and coil car pO). can be operated continuously.

To explain further, first, when winding of a predetermined length of the copper strip is completed by the winding machine (2F11K), the speed of the copper strip is reduced, and the winding machine divided by cutting with the shear (The (rlill band coil on 29) is taken out by coil car 00, and the tip of the divided rolling side copper strip is pinched by pinch roll C26h), and the copper strip is decelerated and fed from the rolling machine (271). is accumulated by a small accumulator (31A), and when the copper strip coil is taken out and preparation for winding is completed, ゛C
1. By feeding the accumulated copper strip into the ready winder (29), a pair of winders (2!1 and coil car 43 (1+) can be used to carry out the take-out operation, and the rolling The device (271) can be operated continuously.

For example, winding tN (2!+1 and coil car (3o)
The time required to take out the copper strip coil and prepare for winding is 40 minutes.
The rolling speed of the copper strip at this time is som per minute.
If the speed is reduced to a certain extent, even if there is sufficient margin, an accumulation amount of 50 m or less will be sufficient.

Note that the copper strip can be easily cut by stopping or further decelerating the copper strip with the pinch rolls (26b) and operating the shear device (28).

As described above, according to this embodiment, during welding.

The rolling speed when the welded part passes through the rolling device, when the winding machine prepares for winding, when the coil is taken out by the coil car, etc. is approximately 10%.
By reducing the speed to 0rn/min or less, it is possible to create a welder and a small accumulator with a simple structure that requires less installation space, and by providing a small accumulator at the rear of the rolling device, the operation of the post-processing device is easy and the structure is simple. This facilitates modification to a continuous steel strip rolling machine using a single steel strip coil. As a result, although the increase in production volume is not as good as the original equipment shown in Figure 1, the results are 1) improved yield, 2) reduced roll consumption, and 3) improved operating rate. , 4), it has the advantage of automating operation, etc., and makes a great contribution to the effective use of existing equipment.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments (the present invention may be modified in various ways without departing from the spirit of the present invention). It is.

[Brief explanation of drawings]

Fig. 1 is a mechanical diagram of a conventional continuous steel strip rolling device, Fig. 2 is a mechanical diagram of a conventional continuous steel strip rolling device using a single steel strip coil, and Fig. 6 is a mechanism showing an embodiment of the present invention. It is a diagram. 21. 21', 60: Coil car 22. 22' Unwinding machine 25: Threading preparation device 24: Shear device 25: Welding part R26a, 26A: Heinfo, Fl/27:
Rolling equipment 28: Shearing equipment 29: Winding machine B: Pre-processing equipment C: Post-processing equipment Sub-agents: 2 patent attorneys and non-Kaimoto important cultural institutions

Claims (1)

[Claims] In a continuous copper strip rolling machine that continuously rolls a copper strip by installing a pre-processing device and a post-processing device before and after the rolling device, there is a space between the pre-processing device and the rolling device and between the rolling device and the post-processing device. A continuous copper strip rolling apparatus, characterized in that a small accumulator is provided, and the rolling speed of the rolling apparatus is reduced when the pre-processing device and the post-processing device are activated.