JP3345274B2 - Method for controlling the order of extraction of materials to be heated - Google Patents

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 the order of extraction of a material to be heated heated by a plurality of heating furnaces, and more particularly, to the number of passes when the material to be heated is reverse-rolled in the next step. In view of the above, the present invention relates to a technique for controlling the order of extraction so as to improve the rolling efficiency.

[0002]

2. Description of the Related Art Conventionally, when extracting a material to be heated heated in a plurality of heating furnaces, constraints (sheet thickness, sheet width, etc.) at the time of rolling in a subsequent rolling step are taken into consideration. The control computer has sequentially extracted the materials to be heated according to the determined extraction order.

[0003] Even if the subsequent process of the heating process is a reversible rolling process, the order of extracting the material to be heated from the heating furnace is not determined in consideration of the number of passes during the reverse rolling. . Therefore, after the one-pass rolled material, three-pass rolled material is extracted, and one-pass rolled material is frequently extracted.

[0004] This will be described with reference to FIG. In FIG. 1A, reference symbol A denotes an A material that is three passes (a pass returning to the input side once), a B material that is one pass, and 3
A state in which a material C as a pass and a material D as a pass are extracted in order from the heating furnace, and are passed through a rough reverse mill capable of reverse rolling (only R2 is described) and a finishing line (only F1 is described) ( Reference symbol B) is shown, where the horizontal axis indicates the equipment position, and the vertical axis indicates time and elapsed time. In this case, it takes "about 355 seconds" until all the rolling processes are completed. The mark “○” indicates a location where the preceding material and the following material are closest.

[0005]

However, the order in which the control computer performs the extraction operation is determined in advance before the material to be heated is introduced into the heating furnace, and is used in the next step of reverse rolling. This does not take the number of processing passes into consideration, but has a problem.

That is, in order to reduce the rolling processing time of the material to be heated (rolled material), the material to be heated having the same number of passes as the previously rolled material is preferentially heated. It is desirable to extract from the furnace, and conversely, unless you do not extract the material to be heated that does not have the same number of passes with the previously rolled material, the number of passes will not be uniform, shortening the rolling processing time Could not be planned.

For this reason, if the control computer simply performs the operation of extracting the material to be heated in accordance with the fixed extraction order, the number of passes between the preceding material and the extracted material will not be uniform, and the rolling processing time will increase. It has been desired that a means for changing and controlling the extraction order in consideration of the number of passes of the reverse rolling process be produced.

Therefore, the present invention has been made in view of the above-mentioned unsolved problems, and an object of the present invention is to extract a material to be heated in consideration of the number of passes of a reverse rolling process in the next step. The point is to provide a means for changing the order of extraction so that it is performed.

[0009]

According to the first aspect of the present invention, there is provided a method for controlling an order of extracting a material to be heated which is heated by a plurality of heating furnaces. Extraction order (basic extraction order) for each material to be heated
And the number of passes in the reverse rolling, a step of preliminarily determining, and the step of setting the material to be heated in a standby state for extraction in each heating furnace as a candidate material for the next extraction. There is provided a method for controlling a heated material extraction order including a step of selecting the same material as a preceding rolled material and a step of extracting a selected next extraction candidate material in accordance with the basic extraction order.

According to the second aspect of the present invention, in the first aspect, the selected next extraction candidate material is
When extracting according to the basic extraction order, if the extraction order of the next extraction candidate material to be extracted is earlier than the basic extraction order for the next extraction candidate material by a predetermined order or more, the extraction of the next extraction candidate material is not performed. There is provided a method for controlling a heating material extraction order including a step.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a configuration diagram showing an outline of the configuration of the system of the present invention. This system has four heating furnaces a (1), heating furnaces b (2), heating furnaces c (3), and heating furnaces d.
(4) an extractor 2 which is an extraction device provided for each heating furnace in order to extract a material to be heated from each heating furnace.
2 and in order to extract the material to be heated by performing a predetermined process,
A control computer 100 for providing an operation control signal to the extractor 22. Then, the next extraction candidate material (rolled material in the furnace) which is the material to be extracted next and exists at the extraction start position of each heating furnace is 11, 12, 1
3, 14 are shown. Moreover, the in-furnace rolled material 11,
Upper part of each of 12, 13, and 14 (second from top)
, There are rolled materials 15, 16, 17, 18 in the furnace.

The rough rolling mills 5 (R1), 6 (R2),
A finishing mill including 7 (R3), 8 (R4), 9 (R5) and capable of performing reverse rolling, and a finishing line including a finishing mill 10 (only one stand F1 is shown in the drawing); And a coiler (not shown) for winding the rolled steel strip, the pre-rolled material 19 extracted from the heating furnace and put on the line, the rough rolling mill 5 (R1),
Rolled material 21 that has been rolled by 6 (R2) and rolled material 23 that has been rolled by rough rolling mills 7 (R3), 8 (R4), and 9 (R5) are placed on a rough mill line. Existing. In the drawings, the rolling direction is indicated by an arrow pointing to the right, and the fixing device and the like of each rolling mill are not shown because they are not relevant to the essence of the invention. Furthermore, in this system, the rough rolling mill 6 (R2) is configured to be capable of reverse rolling, and the number of passes of one pass or three passes is controlled for each rolled material in the furnace in consideration of the material size, steel type, and the like. It is registered in the computer 100 in advance.

With such a system configuration, one of the next extraction candidate materials 11, 12, 13, and 14 is extracted from the heating furnace, and is sequentially rolled by a rough rolling mill and a finishing rolling mill. Steel strip coils will be produced.

Next, a detailed configuration of the control computer 100 that performs main processing such as extraction processing will be described with reference to FIG. The control computer 100 includes an interface unit 20 for outputting an operation control signal to each of the extra crawlers 22 and an extraction control signal with reference to a predetermined extraction order (basic extraction order) and the number of passes for each material to be heated. , An input unit 60 for inputting necessary information such as the basic extraction order and the number of passes, and necessary information such as the basic extraction order and the number of passes are provided via the input unit 60. Display unit 50 for displaying according to instructions
And a storage unit 40 for storing information such as the basic extraction order and the number of passes given via the input unit 60. The processing unit 30 further includes Number-of-passes checker 32 that determines the identity of the number of passes with the material
An extraction order control unit 34 for controlling the change of the basic extraction order based on the processing result of the pass number check unit 32 and the basic extraction order, and for extracting the material to be heated in accordance with the change-controlled extraction order. And an extractor control unit 36 for generating a control signal for controlling the operation of the extractor.

As described above, the basic extraction order is
An extraction order determined in advance for each material to be heated,
It is assumed that the information is previously registered in a specific area in the storage unit 40 via the input unit 60. Similarly, the number of passes for each material to be heated is also registered in a specific area in the storage unit 40 via the input unit 60 in advance.

As can be seen with reference to FIG. 1, the interface unit 20 is an electronic device such as an input / output IC, and the storage unit 40 is a hard disk driver (HDD).
The display unit 50 is a display device such as a CRT or a liquid crystal display, the input unit 60 is an input device such as a keyboard and a mouse, and the processing unit 30 is a ROM having a built-in operation program and an operation program. Operating as a work area, RA operating as a work area, etc.
Since the control computer 100 can be realized by an electronic device such as an M, the control computer 100 can be realized by one information processing apparatus such as a personal computer and a workstation.

Now, the operation of the present system will be described focusing on the operation of the control computer 100. First, the case shown in FIG. 4 will be described with reference to the flowchart in FIG. The case shown in FIG.
As shown in FIG. 5, No. 8 to No. 8 (extraction order)
1 (heating furnace a (1)), rolled material 12 (heating furnace b
(2)), rolled material 15 (heating furnace a (1)), rolled material 13
(Heating furnace c (3)), rolled material 16 (heating furnace b (2)),
Rolled material 14 (heating furnace d (4)), rolled material 17 (heating furnace c
(3)), and the rolled material 18 (heating furnace d (4)). "Rolled material 11, rolled material 1
2, rolled material 15, rolled material 13, rolled material 16, rolled material 1
The number of passes of “4, rolled material 17, rolled material 18” is “3 passes, 1 pass, 3 passes, 1 pass, 1 pass” as shown in FIG.
Pass, three passes, three passes, three passes ".

First, the extraction order control unit 34 determines in step S
In 100 (FIG. 3), the next extraction candidate material determination processing is performed with reference to the basic extraction order registered in the specific area of the storage unit 40 in advance. Thereby, the extraction order control unit 34
Are “rolled material 11, rolled material 12” which is the material to be heated which is present at the lowest position of the heating furnace and corresponds to the basic extraction order “No. 1, 2, 4, 6” , Rolled material 13, and rolled material 14 ”are grasped as candidate materials to be extracted next time (in FIG. 4, indicated by“ に ”in a candidate material selection column). in this way,
Actually, in the storage unit 40, the basic extraction numbers are registered by being grouped into the materials to be heated stored for each heating furnace,
The number is registered so that the extraction order control unit 34 can grasp the basic extraction order of the material to be heated existing at the lowest position for each heating furnace.

Next, in step S150 of FIG.
The number-of-passes check unit 32 obtains the number of passes of the next extraction candidate material, and performs a coarse reverse mill pass number check process of selecting the same number of passes as the preceding rolled material. To this end, the pass count checking unit 32 compares the pass count of the preceding rolled material stored in a specific area in the storage unit 40 with the pass count of the next extraction candidate material and finds a match. obtain. Now, assuming that the number of passes of the preceding rolled material 19 is “1”, the “rolled material 12, rolled material 13” is the same as the number of passes of the preceding rolled material 19 as shown in FIG. 4. In the "pass count check" column, "o" is displayed).

Next, in step S200,
The extraction order control unit 34 performs a next extraction material determination process of determining, as the next extraction material after the pass number check, a material having the highest basic extraction order as the next extraction material. Specifically, the extraction order control unit 34 selects the candidate material 12 having the highest rank “2” among the “rolled materials 12 and rolled materials 13” which are the next candidate materials after the pass number check. Is determined as the next extraction material. Then, the extractor control unit 36 gives a control signal to the extractor 22 of the heating furnace b (2) corresponding to the basic extraction number “No. 2” registered in the storage unit 40, and
2 is performed. Then, the extracted next extracted material 12 is put into a rough mill line capable of reverse rolling, subjected to rolling processing, and further flows on the line to a finishing step. In the heating furnace 2, the candidate material 12 (rolled material 1
Since 2) is extracted, the rolled material 16 is the next candidate material.

As described above, according to the present embodiment, the extraction order (basic extraction order) and the number of passes in the reverse rolling are determined in advance for each material to be heated, and the extraction standby in each heating furnace is performed. The material to be heated in the state is the next extraction candidate material (candidate material)), and among the next extraction candidate materials, those having the same number of passes as the preceding rolled material are selected.
Since the selected next extraction candidate material is extracted in accordance with the basic extraction order, the reverse rolling processing time is reduced and the rolling processing efficiency can be improved.

This situation will be described with reference to FIG. FIG. 6 shows that “A material (3 passes), C
FIG. 4 is an explanatory diagram showing a relationship between a rolled material position (equipment position) and time (symbol D) in a case where materials (3 passes), B materials (1 pass), and D materials (1 pass) are extracted in this order. , A, and the material C having the same number of passes is extracted after the material B, and the material D having the same number of passes is extracted after the material B, so that FIG. As compared with the case of the above, the rolling processing time was shortened by 22 (seconds), and the rolling processing time was "333 (seconds)", and the rolling processing efficiency was greatly improved.

Next, an example of processing to which the present invention is applied in another case will be described. In this case, as shown in FIG. 5, the basic extraction order No. 1 to No. 8 (extraction order)
Rolled material 11 (heating furnace a (1)) of three passes, rolled material 12 of three passes (heating furnace b (2)), rolled material 15 of three passes (heating furnace a (1)), rolled material 13 of three passes (Heating furnace c (3)),
1-pass rolled material 16 (heating furnace b (2)), 1-pass rolled material 14 (heating furnace d (4)), 3-pass rolled material 17 (heating furnace c (3)), 3-pass rolled material 18 (heating furnace d
(4))).

First, the extraction order control unit 34 determines in step S
100 (FIG. 3), a specific area of the storage unit 40
The next extraction candidate material determination processing is performed with reference to the basic extraction order registered in advance. Thereby, the extraction order control unit 3
No. 4 is a material to be heated which is present at the lowest position of the heating furnace and corresponds to the basic extraction order “No. 1, No. 2, No. 4, No. 6” as a candidate material for the next extraction. 12, rolling material 13 and rolling material 14 "are grasped as candidate materials for the next extraction (indicated by" O "in the column of candidate material selection in FIG. 5). As described above, in actuality, the basic extraction numbers are grouped and registered in the storage unit 40 for the materials to be heated accommodated for each heating furnace, and the extraction order control unit 34 determines the maximum number for each heating furnace. The numbers are registered so that the basic extraction order of the material to be heated existing at the lower position can be grasped.

Next, in step S150 of FIG.
The pass number check temperature calculation unit 32 performs
A coarse reverse mill pass number check process for selecting a candidate material having the same pass number as the pass number of the preceding rolled material 19 is performed. As shown in FIG. 5, only “rolled material 14” is grasped as the one selected after the number of passes check (in FIG. 5, indicated by “○” in the column of the number of passes check).

Next, in step S200,
The extraction order control unit 34 performs a next extraction material determination process of determining, as the next extraction material after the pass number check, a material having the highest basic extraction order as the next extraction material. When the extraction order of the next extraction candidate material is earlier than the basic extraction order for the next extraction candidate material by a predetermined order or more (for example, 3 or more), the next extraction candidate material is not extracted. . Specifically, the extraction order control unit 34 uses the rolled material 14 as the extracted material because the basic extraction order of the “rolled material 14”, which is the next candidate material after the pass number check, is advanced by 5th. Without doing anything, extraction according to the basic extraction order, that is,
A process is performed in which the rolled material 11 is used as the next extracted material in accordance with the basic extraction order.

The extractor control unit 36
The control signal is given to the extractor 22 of the heating furnace a (1) corresponding to the basic extraction number “No. 1” registered in the storage unit 40 to perform the operation of extracting the rolled material 12 as the next extracted material. Then, the extracted rolled material 12 is put into a rough mill line, subjected to a rolling process, and further flows on the line to a finishing process. Since the rolled material 11 has been extracted in the heating furnace a (1), the rolled material 15 is a candidate material for the next extraction.

As described above, when the selected next extraction candidate material is extracted in accordance with the basic extraction order, the extraction order of the extracted next extraction candidate material is changed to the basic extraction order for the next extraction candidate material. If it is earlier than the predetermined rank, the candidate material for the next extraction is not extracted,
Extreme jumping of the extraction order is prevented, large fluctuations in the extraction order are prevented, and the stability of the extraction order control can be maintained.

[0029]

As described above, according to the first aspect of the present invention, the extraction order (basic extraction order) and the number of passes in reverse rolling are determined in advance for each material to be heated. The material to be heated in the extraction standby state in each heating furnace is set as the next extraction candidate material, and among the next extraction candidate materials,
Since the number of passes is the same as that of the preceding rolled material, and the selected next extraction candidate material is extracted in accordance with the basic extraction order, the reverse rolling processing time is reduced and the rolling processing efficiency is improved. This has the effect.

In particular, according to the second aspect of the present invention, when the selected next extraction candidate material is extracted in accordance with the basic extraction order, the extraction order of the next extraction candidate material to be extracted is changed to the next extraction candidate material. In the case where it is earlier than the basic extraction order for the material by a predetermined order or more, the extraction of the candidate material for the next extraction is not performed, so that in addition to the effect of claim 1, extreme jumping of the extraction order is prevented, There is an effect that the stability of extraction order control can be maintained.

As described above, according to the present embodiment, the order of extracting the material to be heated from the heating furnace is the same as the number of passes of the rough reverse mill of the preceding rolled material and the number of passes of the next extracted material. The extraction order is controlled to be changed so that the processing efficiency of the rolling process can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control computer.

FIG. 2 is a configuration diagram showing a configuration outline of a system according to the present invention.

FIG. 3 is a flowchart showing processing contents of an embodiment according to the present invention.

FIG. 4 is an explanatory diagram for explaining processing contents of an embodiment according to the present invention.

FIG. 5 is an explanatory diagram for explaining the processing content of the embodiment according to the present invention.

FIG. 6 is an explanatory diagram comparing a conventional technique and the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Heating furnace 3 Heating furnace 4 Heating furnace 5 Rough rolling mill 6 Rough rolling mill 7 Rough rolling mill 8 Rough rolling mill 9 Rough rolling mill 10 Finish rolling mill 11 Rolled material in furnace 12 Rolled material in furnace 13 Rolled in furnace 13 Material 14 Furnace rolled material 15 Furnace rolled material 16 Furnace rolled material 17 Furnace rolled material 18 Furnace rolled material 19 Pre-rolled material 20 Interface unit 22 Extractor 32 Pass number check unit 34 Extraction order control unit 36 Extractor control Unit 40 storage unit 50 display unit 60 input unit 100 control computer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-25513 (JP, A) JP-A-8-174221 (JP, A) JP-A-7-188785 (JP, A) JP-A-63-1988 53217 (JP, A) JP-A-63-53215 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C21D 1/00 112 C21D 9/00 101 C21D 11/00 105 B21B 37 / 00

Claims (2)

(57) [Claims] 1. A method for controlling the order of extraction of a material to be heated which is heated by a plurality of heating furnaces, wherein the order of extraction (basic extraction order) and the number of passes in reverse rolling are determined for each material to be heated. And the step of setting the material to be heated in the standby state for extraction in each heating furnace as the candidate material for the next extraction. Among the candidate materials for the next extraction, those having the same number of passes as the preceding rolled material And a step of extracting the selected next extraction candidate material in accordance with the basic extraction order. 2. The method according to claim 1, further comprising: when extracting the selected next extraction candidate material in accordance with the basic extraction order, the extraction order of the next extraction candidate material to be extracted is the same as that of the next extraction candidate material. A method for controlling a heating material extraction order including a step of not extracting the next extraction candidate material when the extraction order is earlier than a predetermined order by a predetermined order.