JPS5856643B2 - Renzo Clay Can Atsuen Sochi - Google Patents

Description

[Detailed description of the invention] The present invention relates to continuous cold rolling equipment.

In recent years, continuous cold rolling equipment has replaced the batch-type tandem mill that rolls coils one by one. Various continuous rolling methods have been proposed in which the coil is connected to the tip of the succeeding coil, and rolling is performed continuously to wind the coil.
Some of them have already been put into practical use.

In both of the above continuous rolling methods, a well-known pit-type or tower-type looper is installed on the input side of the mill to ensure the time required to connect the coils on the input side, and rolling is performed continuously. be.

The method described above is performed in a conventional batch method.
Threading the tip of the coil, removing ash from the rear end of the coil at the end of rolling, and roll marks that occur during these operations.
This is an attempt to eliminate disadvantages such as off-gauge.

In the above-mentioned conventional continuous rolling method, when the product coil is wound to a predetermined length on the coil winding device on the exit side, the IJ tube is cut using a high-speed shearing device, and then the strip is The coil is wound with another coil winding device, but the shearing capacity of the high-speed shearing machine is much lower than the rolling speed (Maximum 300
Before the product coil reaches the desired length, the rolling speed starts to be reduced, and when the coil reaches the desired length, the rolling speed is set so that the shearing speed is exactly at the maximum shearing speed of the high-speed shearing machine (1st (see figure) must be operated.

The strip is then sheared into products of desired length, and the strip is subsequently wound up using another winding device.

As explained above, since it is necessary to significantly reduce the rolling speed when switching the winding device, not only is the major advantage of continuous rolling, which is improved production efficiency, not fully utilized, but the major drawback is that the product becomes off-gauge. was there.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional drawbacks, an object of the present invention is to provide a continuous cold rolling apparatus that can shear a strip without reducing the rolling speed by providing a looper on the exit side of the mill. The structure of a certain present invention will be explained in detail based on a first embodiment shown in FIG. 2. A strip rewinding device 1 is shown.

1b is installed in parallel, and pinch rolls 2a and 2 are placed in front of it.
b are arranged in parallel, and in front of the pinch roll 2a, a strip 3
, 3' at right angles, and a shearing machine 5 for shearing the edges of the strips 3, 3'.

A welding machine 6 is installed in front of the shearing machine 5 to weld and connect the rear end of the IJ tube 3 and the tip of the rear strip 3'.

A priddle roll 7 and a priddle roll 8 located above are provided in front of this welding machine 6, and then a strip 3
.

Similarly, the entry side looper 9 is installed in the loop housing part 10 of the tower set, and the rolls 11 and 11' located below are respectively attached to the looper carriage 12 so that they can be moved inside the loop housing part 10. .

A plurality of guide rolls 13. are mounted on the mill housing on the exit side of the entry looper 9. . . ., a welding point detector 14 is installed at an appropriate position, and based on the detection signal (described later)
A deceleration start command is sent to the IJ Schiffing devices 15a and 15b.

Upper and lower priddle rolls 16 and 17 are provided in front of the guide roll 13, and the strips 3 and 3' are passed through the upper part of the mill housing and placed on the first stand 181.

In addition, a pinch roll 19 is provided on the exit side of the final stand 186 of each parallel stand, and then
An exit side looper 20' is provided inside.

This exit side looper 20 has a plurality of rolls 21. . . . are mounted on the looper carriage 22 and can be moved within the loop accommodation section 10, and the pass line of the exit side looper 20 is located at the same horizontal level as the mill pass line of the continuous rolling mill. Configure it to do so.

Pinch rolls 23 and 24 are provided at intervals on the exit side of the exit side looper 20, and a high-speed shearing machine 25 is provided between both pinch rolls, so that the IJ knob 3° 3' can be sheared; In front of the high-speed shearing machine 25, the above
Schiff removal devices 15a and 15b are installed in parallel.

The embodiment of the present invention is constructed as described above.
The strip 3 rewound by one of the IJ Schiff unwinding devices 1a and 1b is fed by a pinch roll 2a, forms a loop with an inlet looper 9, and is guided by guide rolls 13° to the □le housing. Pass through the top, upper and lower priddle roll 16
, 17 and sent to the first stand 181, and after being rolled by the respective rolls of the stands 18□, . 15a.

As the rolling progresses, before the rear end of the leading strip 3 passes through the shearing machine 5, the rear end is cut off, and the next rear strip 3' is sent from the strip unwinding device 1b by the pinch rolls 2b. The tip portion is also cut with a shearer 5, the two cut surfaces are brought together and welded with a welder 6, and the bead at the connection portion is removed with a trimmer (not shown) to enable continuous rolling.

The rolled IJ tube is cut into a predetermined length using a high-speed shearing machine 25.
will be cut off.

Further, the operation will be explained in detail with reference to FIGS. 2 and 3.
As the rolling progresses and the remaining amount of strip in the strip unwinding device 1a or 1b decreases, (i) the IJ Schiff unwinding device starts to decelerate and is brought to a stop [see Fig. 3 (a)].

[See mouth] As soon as the operation starts, the looper carriage 12 of the entrance side looper 9 starts to rise.

(See A) Then, while the looper carriage 12 is rising, the leading strip 3 and the trailing strip 3' are welded on the entry side.

When the welding is completed, accelerate the strip rewinding device 1b of the IJ tube 3' (rear S) and move the strip to the first stand 18 (see C).
, the same speed as the input side of .

(See 2) At this time, the looper carriage 12 of the entrance side looper 9 is stopped at the raised position.

(See B) Next, when the welding location is detected by the welding location detector 14, the welding location is detected by the welding location detector 14.
(see E) The speed is reduced to 1, which is the maximum shearing speed of the high-speed shearing machine 25.

(See above) As the strip winding device 15 & or 15b decelerates, the looper carriage 22 of the exit looper 20 starts to rise.

(See C) Then, when the high speed shearing machine 25 is decelerated to the maximum shearing speed 1, the strip is sheared and the strip winding device is switched.

After switching, (c) Accelerate the IJ schiff removal device and lower the looper carriage 22 of the exit side looper 20 until it becomes parallel to the pass line of the mill.

Furthermore, the strip rewinding device is accelerated so that the looper carriage 12 of the inlet side looper 9 also descends at the same descending speed as the looper carriage 22.

(See G and D) And the looper carriages 12 and 22
Both are stopped in the lowered position.

(See E) By performing the above operations, the input speed of the rolled material can be kept constant and continuous high-speed rolling can be performed.

Next, the second embodiment will be described based on FIG. 4. Similar to the first embodiment, pinch row #2a is installed in parallel with the IJ Schiff return devices 1a and 1b.

2b are installed in parallel, and a presser guide 4, a shearing machine 5, and a welding machine 6 are installed in front of the pinch roll 2a.

In front of the welding machine 6, priddle rolls 7.8 are provided at horizontal intervals, and below between the two rolls a deflector roll 7' is provided to allow the strips 3, 3' to pass through.

The strips 3, 3' are then wrapped around an entry loop car 12' provided in a pit-type looper housing 10' to form an entry looper 9, and passed through rolls 26, 27, 28 to the first loop car 12'. As in the example, pass it over the mill housing,
Each stand 18. . . 186, the strip is rolled by the strip winding device 15a, and the strip is rolled by the strip winding device 15a.
, 15b.

Note that the same reference numerals in the figures indicate the same parts and perform the same operations.

Each function of the second embodiment is similar to that of the first embodiment, and since the loop housing section 10 of the first embodiment is a complete set of towers, continuous rooms,
If installation is not possible due to factory equipment, etc., it is effective to adopt a pit type as in this embodiment.

The present invention has the structure and operation as in the above embodiment, and since the exit looper 20 is provided, it is possible to always roll at the maximum speed, and at the maximum speed, the pass line of the strip is horizontal. Therefore, continuous rolling can be performed to fully utilize the capacity of the rolling mill, and the strip does not meander.

Since the inlet looper 9 and the outlet looper 20 are provided in the same loop accommodating section 10, both can be operated with good timing, and the equipment cost can be reduced.

Although two strip winding devices have been described, it is also possible to use one strip winding device by appropriately selecting the storage capacity of the outlet looper 20.

[Brief explanation of the drawing]

The figures show respective embodiments of the continuous cold rolling equipment according to the present invention. Fig. 1 is an explanatory diagram showing the operating state of the continuous rolling equipment of the first embodiment, and Fig. 2 is a schematic diagram showing the overall arrangement. 3 are explanatory diagrams showing the relationship between the rolling speed and the looper, and FIG. 4 is a schematic diagram showing the overall arrangement of the second embodiment. In the figure, 1 is a strip unwinding device, 5 is a shearing machine, 6 is a welding machine, 9 is an entry side looper, 10 and 10' are loop storage parts, 14 is a welding point detector, 15 is a strip winding device, 20 is an outlet looper, and 25 is a high-speed shearing machine.

Claims (1)

[Claims] 1) IJ Schiff return device 1, shearing machine 5, welding machine 6,
It consists of an entry looper 9, a welding point detector 14, a continuous rolling mill, an exit looper 20, a high-speed shearing machine 25, and a strip winding device 15, and a loop housing section is provided between the strip unwinding device 1 and the continuous rolling mill. 10 was installed to house the inlet looper 9 on one side and the outlet looper 20 on the other side, and the pass line of the outlet looper 20 was positioned at the same horizontal level as the □ pass line of the continuous rolling mill. Features of continuous cold rolling equipment.