JPH10128415A - Method for controlling extraction order from heating furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency by preventing the process of the coiling with a coiler or the like that is executed after rolling from becoming the rate controlling of the work. SOLUTION: After successively extracting materials to be heated according to a predetermined order from four heating furnaces 1-4 and rolling them, coiling process is executed to the materials after rolling with the coiler, suitable to the material, which is selected from plural coilers 11-15 which are arranged on the downstream side of the rolling mills 5-10. At this time, in case that the coiler to be applied after rolling to the material scheduled the next extraction from among candidate materials 16-19 which are housed in the respective heating furnaces 1-4 for the next extraction is same as that of the last extracted material which is already determined, the material to be extracted next time is changed to the material whose processing device is different from the last extracted material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a heating furnace extraction sequence, and more particularly to a method for appropriately controlling the extraction sequence when extracting a material to be heated from a heating furnace before rolling in a continuous rolling facility. And a method for controlling the order of extraction of heating furnaces.

[0002]

2. Description of the Related Art When successively rolling a plurality of types of materials in a continuous rolling facility, the materials are stored in a plurality of heating furnaces installed on the upstream side of the rolling mill, and the materials are stored in a predetermined order from the heating furnace. The material was extracted and rolled in sequence. The order of extraction from the heating furnace at that time is determined by the computer that performs the process scheduling at the time of charging the material into the heating furnace, by the constraint conditions of the material at the time of rolling, that is, the preceding material already determined as the previous extraction material. Was determined in consideration of the connection conditions such as the plate thickness and the plate width.

[0003] In a continuous rolling mill, predetermined processing is performed on the material after rolling. For example, in hot rolling, for example, a coiler (winding device) is installed as a processing device behind a finishing mill, and a rolled material that is sequentially conveyed is wound by the coiler. .

[0004] As the above-mentioned coiler, a plurality of coils having proper performance are installed in accordance with the bending moment at the time of winding which varies depending on the type of steel of the material to be rolled, and the like. The most suitable coiler is selected and used according to the conditions.

[0005]

However, the material (subsequent material) to be extracted next time in the predetermined order is the same as the preceding material which has already been determined as the previously extracted material and the same coiler applied after rolling. In this case, after the preceding material winding operation is completed, the winding of the succeeding material will be started, so the rate-limiting step of continuous rolling will be the winding operation,
There was a problem that the rolling efficiency was reduced.

The present invention has been made to solve the above-mentioned conventional problems, and improves the rolling efficiency by preventing a predetermined process such as winding by a coiler performed after rolling from limiting the work. It is an object to provide a heating furnace extraction sequence control method capable of performing the above steps.

[0007]

SUMMARY OF THE INVENTION According to the present invention, after a material after heating is sequentially extracted and rolled from a plurality of heating furnaces according to a predetermined order, a plurality of processing apparatuses arranged downstream of a rolling mill are used. In the heating furnace extraction sequence control method applied when performing a predetermined process on the material after rolling by a processing device suitable for the selected material, the material to be extracted next time is the previously extracted material that has already been determined. If the material and the processing equipment to be applied after rolling are the same, by changing the next extraction material to a different material from the previous extraction material and the processing equipment,
This has solved the above-mentioned problem.

That is, in the present invention, after a material extracted sequentially from a plurality of heating furnaces is rolled in accordance with a pre-planned extraction order, when a predetermined process such as winding is performed by a plurality of devices, the material is extracted from the heating furnace. At the stage of extracting the material, an appropriate material according to the use condition of the processing device applied to the preceding material is extracted from the heating furnace for the next rolling, so that one processing device is continuously connected. Since it is possible to avoid using the same processing apparatus continuously, it is possible to prevent the work from being rate-determined, and as a result, it is possible to improve the rolling efficiency.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 schematically shows a hot rolling facility applied to a heating furnace extraction sequence control method according to an embodiment of the present invention, and FIG. 2 shows a heating furnace constructed in the hot rolling facility. 1 shows a schematic configuration of an extraction control device (system).

The above-mentioned hot rolling equipment comprises four heating furnaces 1-4.
And rough rolling mills (R1 to R5) 5 arranged downstream thereof
9, a finishing mill 10 (in the figure, only the first stand F1 is omitted, but is actually composed of a plurality of stands), and adjacent mills arranged downstream of the finishing mill 10 in order. Coils 11 and 12 and remote coils 13 to 15 are provided.

In the heating furnaces 1 to 4, the leading materials are accommodated as candidate extraction materials 16 to 19 for the next time, respectively, and are already extracted from the heating furnace and rolled on the line near the rough rolling mill. There are certain rolled materials 20-22.

[0013] In the hot rolling equipment, the plurality of coils 11 to 15 are different from each other in the material that can be wound by the bending moment of the material. Therefore, materials having the same or similar material properties such as bending moments are wound up by the same coiler in principle.

However, when two materials are continuously wound by the same coiler, it takes about 30 seconds from the completion of the coiler winding operation of the preceding material to the start of the winding of the next material. On the other hand, when the properties of two consecutive materials are different, it is possible to wind the preceding material and the following material with different coilers, and thus, the material is wound first. In the case of winding with a different coiler facility, winding of the succeeding material can be started in about 10 seconds after completion of winding of the preceding material. In other words, this means that if the material to be wound by the same coiler is not continuously rolled, the rolling time can be reduced by about 20 seconds and the rolling efficiency can be improved.

Therefore, in this embodiment, in order to prevent continuous rolling of a material that requires the use of the same coiler in the hot rolling equipment, the information transmission path shown in FIG. Is appropriately controlled in the order in which the materials are extracted from the heating furnace.

The control device includes a next extraction candidate material determining unit 31 for determining the material located at the head of each of the heating furnaces 1 to 4 as next extraction candidate materials 16 to 19 as shown in FIG. A current extraction order determining unit 32 that determines the extraction order of each of the candidate materials 16 to 19 based on a predetermined extraction order determined in advance by connection conditions between the preceding material and the succeeding material, Material take-up coiler detection unit 3 for detecting a coiler applied to take up the selected preceding material
3, a next extraction candidate material take-up coiler determination unit 34 that determines a coiler to be applied to take up each of the candidate materials 16 to 19 determined above, and information from these units 32-34. If it is determined that the next extraction scheduled material that follows the predetermined order uses the same coiler as the preceding material, the next extraction material is changed to one that uses a different coiler from the preceding material, and the next extraction material is determined. And a unit 35. The function of each of these units is constructed in advance by software.

In the present embodiment, the leading material of each heating furnace is set as a candidate material for the next extraction, and the winding equipment used for winding the material is changed to a material component or the material at each installation position on the rolling line. From the predicted temperature and the like. Then, a material to which equipment different from the winding equipment applied to the previously extracted material is applied is temporarily determined as the next extracted material. Thereafter, if the constraints on the rolling conditions (connection conditions based on the relationship between the sheet width and the sheet thickness between the preceding material and the succeeding material) are satisfied, the tentatively determined material is used as the next extracted material.

That is, when the candidate 16 to 19 to be detected next time is determined by the next extraction candidate material determination unit 31 by the control device, the current extraction order determination unit 3 based on the information.
In 2, the order of each candidate material is determined in accordance with a predetermined extraction order, the preceding material take-up coiler detecting unit 33 detects a coiler applied to the preceding material, and the next extraction candidate material take-up coiler determining unit 34 performs the extraction. Similarly, a coiler to be applied to each candidate is determined, and based on the determination (detection) information, the next extraction material determination unit 35 automatically determines a material that does not overlap the preceding material with the coiler as the next extraction material. .

This will be described in more detail with reference to the specific example shown in FIG. 3. The current default extraction order for the next extraction candidate materials 16 to 19 in each of the heating furnaces 1 to 4 is 3, 1,. Let it be the second and fourth. Moreover, the coilers applied to the winding of each material are 13, 15, 15,
It is assumed that the winding coiler of the material 20 corresponding to the preceding material of the previous extraction on the rolling line is 15.

Under these conditions, when the next extraction material is determined, materials 16 and 19 to which a different coiler is applied from the preceding material 20 on the rolling line are selected. The next extraction material is determined to be one of these candidate materials 16, 19,
One of them is finally selected in consideration of the original extraction order and the heating condition.

As described in detail above, according to the present embodiment,
When determining the order of extracting the materials to be heated from a plurality of heating furnaces, the use state of the coiling equipment for winding applied to each material is considered, so the same coiler is used continuously. The continuous rolling can be performed without being restricted by the mechanical capacity of the coiler equipment, which is a problem at this time. Therefore, the operation can be performed such that the rolling by the finishing mill becomes the rate-determining operation, and the improvement of the rolling efficiency can be realized.

Although the present invention has been specifically described above, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist thereof.

For example, in the above-described embodiment, the case where the present invention is applied to a hot rolling facility has been described. However, the present invention is not limited to this, and a plurality of air cooling lines installed downstream of a finishing mill in a plate mill. The present invention can also be applied to a case where one of the air cooling lines is selected and used in (processing apparatus) according to a target material.

[0024]

As described above, according to the present invention,
Predetermined processing such as winding by a coiler performed after rolling can be prevented from limiting the work, and the rolling efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a hot rolling facility applied to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a control device applied to the embodiment.

FIG. 3 is an explanatory diagram showing a specific example for explaining the operation of the embodiment.

[Explanation of symbols]

 1-4 ... heating furnace 5-9 ... rough rolling mill 10 ... finishing rolling mill 11-12 ... proximity coiler 13-15 ... distant coiler 16-19 ... next extraction candidate material 20-22 ... rolled material 31 ... next extraction candidate material Determination unit 32: Current extraction order determination unit 33: Leading material winding coiler detection unit 34: Next extraction candidate material winding coiler determination unit 35: Next extraction material determination unit

Claims (2)

[Claims] 1. A method according to claim 1, wherein the heating furnace comprises:
After sequentially extracting and rolling the heated material, a predetermined processing is performed on the material after rolling by a processing device suitable for the material selected from a plurality of processing devices arranged downstream of the rolling mill. If the material to be extracted next time is the same as the previously extracted material that has already been determined and the processing equipment to be applied after rolling, the next time the extracted material is extracted A heating furnace extraction sequence control method, wherein a material and a processing device are changed to different materials. 2. The heating furnace according to claim 1, wherein the plurality of processing devices disposed downstream of a rolling mill are winding devices disposed downstream of a finishing mill of a continuous rolling facility. Extraction order control method.