JPH01210159A - Method and device for manufacturing hot-rolled band material from windable continuous casting material - Google Patents

Abstract

PURPOSE: To facilitate the treatment of a coil and to obtain a strip in comparatively short length of the whole apparatus by uncoiling at the same place as a place coiling up a continuously cast material without replacing the coil. CONSTITUTION: The continuously cast material 10 drawn out from a continuous caster 1 at a prescribed thickness is carried through an interval furnace 3 for uniformizing the temp. or adjusting in some case. Then, this continuously cast material 10 is coiled up into a coil 12 after forming the first coiled material in a coiling-up and uncoiling device 5. At the time of completing the coiling-up process, the end part of the coiled continuously cast material 10 is supplied to a rolling-mill 6 as the tip part, and this continuously cast material 10 is rolled to the finished strip 9 and coiled up with the coiler 7. Since the rolling speed during this period is quicker by about 10th power than the casting speed, the device 5 becomes empty condition before the following continuously cast material 10 reaches the device, and therefore, the preparation or the setting for coiling up the new coil 12 can be executed.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention comprises a method defined in the general concept of claim 1;
and an apparatus for this method as defined in the preamble of claim 3. In this case, the device parts for continuous casting can have vertical or horizontal exit openings or can be equipped with so-called band casters.

Unless the continuous cast material cannot be rolled up again due to its thickness, it is necessary to place a reduction mill behind the continuous caster. The rolling mill downstream of the winding device can be designed, for example, as a tandem mill or as a starboard mill.

In hot rolling, the lowest technically practicable rolling speed is approximately 10 times higher than the continuous casting speed of a continuous casting machine. For this purpose, lengths corresponding to a predetermined coil weight are cut from the continuous cast material each time, and after being stored in a heat-insulating chamber, they are each fed to one rolling mill or one rolling line.

[Prior Art] In the method and apparatus known from DH-O 3 3 2 4 1 7 45, the continuous cast material is wound into a coil in a first coiler (winding device) and as a coil in a second coiler (winding device).
It is supplied to an unwinding device) from which it is unwound and supplied to a rolling mill. Replacing the coils requires lifting and transporting equipment which requires considerable investment. Additionally, this coil replacement requires time for the hot coil to lose heat. DE- mentioned earlier
According to the embodiment disclosed in OS 3241745, the hot coil that has been wound up is placed in a section furnace and from there is further conveyed to an unwinding device, which requires another replacement of the hot coil. and requires further expenditure for conveying equipment inside the furnace.

In order to maintain the casting heat as much as possible, the DE-O33
No. 241,745 further proposes arranging the winding and unwinding devices in a common oven. However, in that case the coil must be replaced inside the furnace, which requires high technical outlays due to the hot furnace air.

The device known from DE-O 3 3 2 4 1 745 accelerates and winds up the still unrolled part of the continuous cast material after cutting off, reducing the time required to transport the finished coil to the winding device and thus the subsequent casting speed. In order to make room for the incoming continuous cast material, a hoisting device is arranged at a predetermined distance from the transverse shear.

In this case, the section between the transverse shear and the winder is not surrounded by a furnace, so that there are various possibilities for cooling the rolled continuous cast material. Furthermore, it is known to guide the cast continuous cast material straight through the furnace chamber, in which case the continuous cast material is separated from the following continuous cast material before or as soon as it reaches the rolling mill. . However, if the coil dimensions are large and the cast material is thin, the straight condition eliminates the need for a prohibitively expensive and extremely long furnace chamber.

[Problem to be Solved by the Invention] An object of the present invention is to simplify the processing of a coil wound from continuous cast material. Furthermore, in the present invention, it is desired that the temperature of the continuously cast material becomes uniform immediately after passing through the transverse shear, and can be adjusted as the case may be.

Means for Solving the Problem The problem underlying the invention is solved by unwinding the continuous cast material at the same place where it was wound, without replacing the coil.

Expensive replacement of coils wound in this way is no longer necessary.

[Effects of the invention 1] The effects of the present invention are that there is no need to replace the wound coil, the coil is easier to handle, the length of the entire device is relatively short, and a lifting and transporting device to replace the coil is no longer required. It is what happens.

[Embodiment] In order to make the temperature of the continuous cast material uniform, the continuous cast material is guided into a furnace chamber serving as a heat insulating chamber at the latest during winding up. Insofar as only one hoisting device is provided, it is proposed in accordance with claim 3 to provide a section furnace chamber as a heat-insulating section. This eliminates the need for continuous cast material following the casting speed to be cut into ingots and returned to the casting device. In this case, the length of the section furnace is not determined by the coil weight, as in the known section furnaces for receiving unwound continuous cast material, but only by the high speed rolling time.

In terms of equipment, the object of the invention is solved on the one hand in that only one winding and unwinding device is provided between the cross-cutting shear and the rolling mill. This winding and unwinding device can be upstream of a section oven. According to claim 7, the hoisting device can also be arranged in the furnace chamber, which furnace chamber can form a unit with the furnace section.

According to claim 8, the object of the invention is achieved in that the coiler consists of two winding and unwinding devices which are arranged in the furnace chamber at a height offset from each other. While the coil is being wound on one of the winding and unwinding devices at a slow casting speed, the coil on the other winding and unwinding device can be unwound at a high rolling speed. Therefore, after winding one coil, the other winding and unwinding device is always on standby for winding the next coil. A buffer section is therefore not required in this solution, so that the overall length of the device is relatively short.

Claim 9 describes an advantageous embodiment of the cross-cutting shear, in which the new tip of the continuous cast material produced by the cutting can be guided in a simple manner to the respective winding and unwinding device. It will be destroyed.

[Example] The apparatus according to FIGS. 1 and 2 is arranged in one phase one behind the other, and has a series casting device l, a transverse shear 2, a section furnace 3, and a separate furnace chamber 4.
A winding/unwinding device 5, a rolling line or a rolling mill 6, and a rolled strip 9 connected behind the winding/unwinding device 5.
It has a winder 7 for forming a coil from the coil. A winding and unwinding device is described, for example, in the West German periodical Steel and Iron J 103 (1983), page 7.296.

The continuous casting material 10 comes out of the continuous casting Ifll with a thickness of, for example, 50 mm. If the continuously cast material is thicker, it is possible to place a reduction mill 11 (indicated by a dashed line) in front of the transverse shear 2. The continuous cast material 10 is conveyed through a section furnace 3 in order to equalize or, if necessary, regulate its temperature, and after forming the first strip in a winding and unwinding device 5 it is wound into a coil 12. It will be done.

When the portion of the continuous casting material 10 that has passed through the cross-cutting shear 2 corresponds to the weight of the finished coil 8, the cross-cutting shear 2 is operated, and the rotation speed of the drive roller of the winding/unwinding device 5 is accelerated to continuously cast the coil 12. The material IO is accelerated and rolled up, and the remainder is drawn out from the section furnace 3 at a corresponding speed. In the meantime, the beginning of the subsequent cast material lO moves at casting speed (low speed) through the section furnace 3 in the direction of the winding and unwinding device 5 (see FIG. 2).

When the winding process of the coil 12 is completed, the end of the rolled up continuous cast material IO is supplied as a tip to a rolling machine, and this continuous cast material IO is rolled into a completed strip material 9, and then passed through a winding machine. 7 to be wound into a coil 8.

Since the rolling speed is approximately 10 times faster than the casting speed,
The winding and unwinding device 5 is in an empty or released state and is prepared or set for winding a new coil 12 before the following continuous casting material 10 reaches this winding and unwinding device 5. Can be done.

In the illustrated embodiment, the rolling line 6 is constructed as a tandem rolling mill with a number of quadruple rolling mills 13 arranged one behind the other. However, rolling lines such as DE-O
It may also be constructed as a Stellakel rolling mill as disclosed in No. 3,324,745.

In the embodiment shown in FIG. 3, the continuous cast material 10 also comes from the continuous caster 1 and this continuous cast material IO is led through a transverse shear 20. This shear has a vertically movable cutter pair 21.22 which cooperates with a fixed counterpart cutter 23. A guide or support member 24 is arranged downstream of the fixed counterpart cutter 23, which supports the continuous cast material 10 by means of an upper winding and unwinding device 26, 27 and a lower winding and unwinding device. 26° and 27° alternately. The upper and lower winding and unwinding devices 26, 27 are located in the oven chambers 28, 29, if necessary also offset horizontally. Both winding and unwinding devices 26
．． 27, the rolling line 6 is arranged as already described in connection with FIG.

In the operating state illustrated in FIG. The coil 12 in the unwinding device 27 is drawn out via the rolling line 6.

In contrast to the embodiments described above, in the case of smaller installations, instead of the section furnace 3 and the furnace chamber 4.28.29, a single insulation chamber can also be installed.

[Brief explanation of the drawing]

FIG. 1 shows the front part, seen in the feed direction, of a device with a single winding and unwinding device and a section furnace upstream of it during winding up continuous cast material as a coil. 2 shows the rear part of the device according to FIG. 1 during unwinding of the coil, and FIG. 3 shows the device with two winding and unwinding devices.

Claims (1)

[Claims] 1. A method for producing a hot-rolled strip from a continuous cast material that can be rolled up, the method comprising forming the continuous casting material into a coil at a casting speed after the continuous casting material has completely solidified. After winding up and reaching the allowable coil weight or desired coil weight, the continuous cast material is separated from the continuously cast material, accelerated and wound up, and then, after being completely rolled up, the continuous cast material is unwound and fed to the rolling mill. Continuously cast materials (1
0) is unwound from the same place where it was rolled up without changing the location of the coil (12, 12', 12''). 2. At the latest when rolling up the continuous casting material (10), place it in the insulation chamber (4).
, 28, 29). 3. Before being rolled up, the continuous cast material (10) is placed in the insulation section (3
).) The method of claim 2. 4. The method according to claim 2 or 3, characterized in that heat is applied to the continuous casting material (10) in the insulation chamber (28, 29) or the insulation section (3). 5. It consists of a continuous casting machine, a transverse shear, a winding device, and a rolling mill, and the only hoisting and unwinding device (5) is provided between the transverse shear (2) and the rolling mill (6). Apparatus for carrying out the manufacturing method according to any one of claims 1 to 4, characterized in that: 6. Device according to claim 5, characterized in that the winding and unwinding device (5) is preceded by a thermal insulation section (3). 7. Device according to claim 5, characterized in that the winding and unwinding device (5) is located in the insulation chamber (4). 8. Two winding and unwinding devices (26, 27) arranged at staggered heights, consisting of a continuous casting machine, a cross-cutting shear, a winding device, and a rolling mill. ). Apparatus for carrying out the manufacturing method according to any one of claims 1 to 4. 9. The cross-cutting shear (20) is equipped with one cutter pair (21, 22) that is movable up and down, and a corresponding cutter (23) that is immovable and placed after this when viewed in the feeding direction. 9. The guide member (24, 25) for directing the continuous casting material to the winding and unwinding device (26, 27) is also arranged behind the corresponding cutter (23) in the feeding direction. Device. 10. Device according to one of claims 6 to 9, characterized in that the insulation chamber or insulation section (4, 28, 29) is provided with heating means.