JPH1046231A - Method for controlling extruding order of material to be heated - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for controlling the extruding order of heated materials existing in plural heating furnaces and batch furnaces so as to be possible to efficiently use the batch furnace. SOLUTION: This method controls the extruding order of the heated materials existing in plural heated furnaces and batch furnaces. In such a case, the extruding order from the heating furnace is pre-decided to each heated material. When the extruding order from the batch furnace to the heated material (a first heated material: A material) charged into the batch furnace extruded from the heating furnace and further, extruded from the batch furnace is later than the extruding order from the heating furnace to the heated material (a second heated material: N material) successively, extended from the heating furnace and further, charged to the batch furnace, the extruding order from the heating furnace to each heated material is changed so as to be the extruding order from the heating furnace to the second heated material at later than the extruding order from the batch furnace to the first heated 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 the order of extracting materials to be heated existing in a plurality of heating furnaces and batch furnaces.

[0002]

2. Description of the Related Art Conventionally, when extracting a material to be heated which has been heated by a plurality of heating furnaces, consideration is given to constraints (sheet thickness, sheet width, etc.) at the time of rolling in the next rolling step. A specific extraction order has been determined, and the control computer has sequentially extracted the material to be heated according to the determined extraction number. In a line where a batch furnace for heating and keeping the temperature of the material is provided between the heating furnace equipment and the rolling equipment, a specific material to be heated existing in the heating furnace is extracted from the heating furnace. Then, it is put into a batch furnace, further extracted from the batch furnace, and flows on a line to a rolling process. In this way, the order in which the materials to be heated are extracted from the heating furnace and the batch furnace is fixedly predetermined.

[0003]

However, many batch furnaces can only accommodate a predetermined number of materials to be heated due to equipment limitations, and these equipment limitations have led to a reduction in rolling efficiency. For example, if the batch furnace can accommodate only one material to be heated, the material to be charged next into the batch furnace is heated after the material to be heated present in the batch furnace is extracted from the batch furnace. Unless the material is extracted from the furnace and charged into the batch furnace, the material to be heated cannot be charged into the batch furnace due to the capacity of the batch furnace. Therefore, when the batch furnace can store only one material to be heated, for example, the material to be heated in the batch furnace is charged into the batch furnace and the batch furnace is charged. If the extraction from the heating furnace is not completed, the material to be heated next in the batch furnace cannot be charged into the batch furnace. This has resulted in an increase in the interval and a decrease in the efficiency of the rolling process, which is the next process.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to make it possible to efficiently use a batch furnace by determining the order of extraction of materials to be heated existing in a plurality of heating furnaces and a batch furnace. Thus, there is provided a means for controlling the change.

[0005]

According to the first aspect of the present invention, there is provided a method for controlling the order of extracting materials to be heated present in a plurality of heating furnaces and batch furnaces. A step of preliminarily determining the order of extraction from the heating furnace (including the batch furnace) for each material to be heated; and a step of extracting the heating material extracted from the heating furnace into the batch furnace and further extracted from the batch furnace. Material (first material to be heated: material A)
The order of extraction from the batch furnace is determined by the order of the material to be heated (the second material to be heated: N
), The order of extraction of the second material to be heated from the heating furnace is later than the order of extraction of the first material to be heated from the batch furnace. And a step of changing the order in which the materials to be heated are extracted from the heating furnace.

According to a second aspect of the present invention, in the first aspect, the changing of the extraction order in the step of changing the extraction order is performed for calculating the extraction order for each material to be heated. Weighting, and moving the extraction order of the second material to be heated from the heating furnace immediately after the extraction order of the first material to be heated from the batch furnace. Obtaining the value obtained by multiplying the weight of each of the materials to be heated present in the heating furnace in which the second material to be heated is multiplied by the amount of movement as the amount of change in the order of extraction of each material to be heated; For each heated material present in the heating furnace in which the heated material is present, a predetermined extraction order, the extraction order obtained by adding the corresponding extraction order change amount as a new extraction order, Control method of heating material extraction order, characterized by including It proposed.

[0007] Here, the weighting to be performed on each of the materials to be heated is to be extracted after the second material to be heated among the materials to be heated existing in the heating furnace in which the second material to be heated exists. The value of each material to be heated and the value of the second material to be heated are the same and the maximum value.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, the principle of the present invention will be described with reference to FIG. 5 to facilitate understanding of the contents of the present invention. FIG. 5A shows an extraction order (extraction order before changing the extraction order) of each material to be heated from a heating furnace (and a batch furnace), and FIG. (The extraction order after the extraction order is changed). FIG.
In (a), the extraction order “1, 2, 3, 4,
, N, N-1,..., X,..., And the material to be extracted "A material, B material, C material, D material, ..., M material, N material,.
A material,... ". And A
The material (material to be charged into the batch furnace) is a material to be heated (first material to be heated) extracted from the heating furnace, charged into the batch furnace, and further extracted from the batch furnace. The material to be charged) is the material to be heated (the second material to be heated) extracted from the heating furnace after the material A and charged into the batch furnace. And the extraction order (X) of the material A from the batch furnace is
The case where the order of extraction of the N material from the heating furnace (N) is later is shown. In such a case, the extraction order is determined so that the operation of charging the N material into the batch furnace is performed before the extraction of the A material from the batch furnace. Since the input / extraction operation is not performed normally, it is necessary to change the extraction order.

Therefore, it is necessary to change the order of extraction as shown in FIG. In FIG. 5B, the extraction order “1, 2, 3, 4,..., Y, Y + 1,.
And the material to be extracted “A material, B material, C material, D
, A material, N material, ... ". The changed extraction order is as follows: the extraction order (Y + 1) of N (second heated material) from the heating furnace is changed to A (first heated material).
The order in which the materials to be heated are extracted from the heating furnace is changed so as to be later than the order of extraction (Y) from the batch furnace. As a result, the operation of charging and extracting the materials A and N into the batch furnace is performed normally. Thus, first,
For each material to be heated, the order of extraction from the heating furnace (including the batch furnace) is determined in advance, and the material to be heated is extracted from the heating furnace, introduced into the batch furnace, and further extracted from the batch furnace. The order of extraction of the material (first material to be heated: material A) from the batch furnace is determined by the order of the material to be heated (second material to be heated: N material) extracted from the heating furnace and then charged into the batch furnace. When the order of extraction from the heating furnace is later than the order of extraction from the heating furnace, the order of extraction of the second material to be heated from the heating furnace is later than the order of extraction of the first material to be heated from the batch furnace. The order in which the materials to be heated are extracted from the heating furnace is changed so that the charging and extracting operations to the batch furnace are performed normally. The above is the outline of the principle of the present invention. Hereinafter, it will be described that the present invention can be implemented by a specific system configuration and operation.

FIG. 2 shows an outline of the configuration of a system according to an embodiment of the present invention. This system includes four heating furnaces a (1), heating furnaces b (2), heating furnaces c (3), heating furnaces d (4), a batch furnace 5, each heating furnace and a batch furnace 5.
Extractors 30 and 31 which are extraction devices provided for extracting the material to be heated from the extractors 30 and 31 for extracting the material to be heated by performing a predetermined process.
1 for providing an operation control signal to the control computer 1. The batch furnace 5 can store only one material to be heated, and is provided for heating the stored material to be heated and keeping the temperature. In addition, the heating furnace a (1) includes:
From the order close to the extractor 30,
2, 16, 20, 24 ”are placed in the heating furnace b (2) in the order from the closest to the extractor 30 in the order of“ the materials to be heated 9, 13, 1 ”.
7, 21, 25 ”are placed in the heating furnace c (3) in the order from the closest to the extractor 30 in the order of“ the materials to be heated 10, 14, 18,
22 and 26 ”, and further, in the heating furnace d (4),“ the materials to be heated 11, 15, 1
9, 23, 27 ", and the batch furnace 5
It is assumed that the material to be heated 7 (material to be extracted in a batch furnace) is stored. The material to be heated 17 in the heating furnace b is a material to be charged into the batch furnace 5 to be charged into the batch furnace 5 next.

A rough mill line provided with a rough rolling mill 6 and the like (only R1 is shown in the figure), a finishing mill (not shown), and a coiler (not shown) are arranged in this order. In the figure, the rolling direction is indicated by an arrow indicating the right direction,
The fixing device and the like of the rough rolling mill are not shown because they are not related to the essence of the invention. With such a system configuration, the material to be heated extracted from the heating furnace or the batch furnace is sequentially rolled by a rough rolling mill and a finishing rolling mill, and finally a steel strip coil is manufactured by a coiler. .

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 extractors 30 and 31, and an extraction order and a batch furnace extraction scheduled material / batch furnace extraction scheduled material which are predetermined for each material to be heated. An extraction order control unit 34 for controlling the change of the extraction order with reference to the extraction number and the like; and a control signal for operation-controlling each of the extra crushers 30 and 31 in order to extract the material to be heated in accordance with the change-controlled extraction order. Extractor control unit 36 for generating the material, information for preliminarily determining the order of extraction from the heating furnace (including the batch furnace) for each material to be heated, materials to be extracted from the batch furnace, and materials to be extracted from the batch furnace Input unit 60 used to provide information such as the extraction number of the storage unit, storage unit 40 storing information given through input unit 60, and input unit 60 provided through input unit 60. Configured as I was instructed, it has a display unit 50 for displaying information or the like stored in the storage unit 40, a. Therefore, the extraction order control unit 34 controls the change of the extraction order with reference to the contents stored in the storage unit 40. 1, the interface unit 20 is an electronic device such as an input / output IC, the storage unit 40 is a storage device such as a hard disk driver (HDD), and the display unit 50 is a CRT or a liquid crystal display. A display device such as a keyboard, a mouse, etc., an input device such as a keyboard, a mouse, and the like. Further, an extraction order control unit 34 and an extractor control unit 36 include a ROM having a built-in operation program, a CPU performing an operation according to the operation program, Since the control computer 100 can be realized by an electronic device such as a RAM that operates as a work area or the like, the control computer 100 can be realized by a single information processing device such as a personal computer or a workstation.

Now, the operation of the present system will be described focusing on the operation of the control computer 100. First, the case where the extraction order is predetermined as shown in FIG. 4 in the storage state of the material to be heated as shown in FIG. 2 will be described with reference to the flowchart of FIG. Note that FIG. 4 shows a state in which the extraction order “1, 2, 3,..., 21” and the extraction target “material 8, material 9, material 10,. It is assumed that such information is stored in the storage unit 40 in advance via the input unit 60. Further, in the heating furnace b (2) in which the material 7 is the material to be extracted in the batch furnace and the material 17 is the material to be charged in the next batch furnace, and the material 17 which is the material to be charged in the next batch furnace is stored, after the material 17 The heated material to be extracted is
Material 21 and material 25 are used. In addition, as shown in FIG. 4, the extraction order of the batch furnace extraction planned material is later than the extraction order of the next batch furnace input planned material.
It is assumed that the charging and extracting operations to the batch furnace 5 cannot be performed normally.

Now, in step S100 of FIG.
The extraction order control unit 34 refers to the storage unit 40 and refers to the information on the extraction order shown in FIG. 4 stored in advance, and obtains the extraction order of the batch furnace extraction scheduled material. The extraction order fetch process is performed. That is, the extraction order control unit 34 sets the extraction order of the batch furnace extraction scheduled material as
The extraction order “No. 15” is acquired.

Next, in step S150 of FIG.
The extraction order control unit 34 refers to the storage unit 40 and refers to the pre-stored extraction order information shown in FIG. The input material extraction order taking-in process is performed. That is, the extraction order control unit 34 acquires the extraction order “No. 10” as the extraction order of the material to be charged in the next batch furnace. Further, in step S200, the extraction order control unit 34
Compares the extraction order obtained in step S100 and step S150. At this time, when the order of extracting the materials to be charged in the next batch furnace is later than the order of extracting the materials to be extracted in the batch furnace, it is determined as “OK”, otherwise, it is determined as “NG”. Specifically, the extraction order “No. 10” of the material to be charged in the next batch furnace is not later than the extraction order “No. 15” of the material to be extracted in the batch furnace, and thus is determined to be “NG”. When it is determined that the extraction order is “OK” in step S200, the process ends without changing and controlling the extraction order. On the other hand, when it is determined that the extraction order is “NG” in step S200, the extraction order is changed. In order to perform the change control, the process proceeds to step S250, and the extraction order control unit 34 performs an extraction order change process. Then, although not shown, after the end, the extractor control unit 36 sends an operation control signal to each extractor in accordance with the determined extraction order (in the case of “OK” in step S200, the first extraction order). Then, the operation of extracting the material to be heated is performed.

Now, the mode of the extraction order changing process performed in step S250 will be described in detail. First, the first mode will be described with reference to FIGS.

The symbol A in FIG. 7 indicates the extraction order of the initially determined materials. Then, the extraction order “No. 10” of the material to be charged in the next batch furnace is not later than the extraction order “No. 15” of the material to be extracted in the batch furnace, so it is determined to be “NG” and the extraction order change processing is performed. Become. First, the extraction order control unit 34 controls the material to be charged in the next batch furnace (material 1).
The order of extraction is changed so that the extraction order of 7) becomes the next extraction order of materials to be extracted in the batch furnace (material 7). As a result,
The extraction order of the material 7 and the material 17 is “No. 14”,
"No. 15". By the way, at this time, as shown by the symbol E, the order of extraction of the materials in the same heating furnace cannot be overtaken, so that the material 17 in the heating furnace b (2)
The relationship of the extraction order with the materials 21 and 25 must be considered. First, as shown by the symbol F, the extraction order of the material 21 must be after the material 17, and
At the time of the extraction change of 1, a similar adverse effect may occur (reference G). Therefore, as shown by the symbol H, the heating furnace b
It is conceivable that the extraction order of the materials 17 and after (2) is changed uniformly by the extraction change amount of the material 17. Here, the extraction change amount of the material 17 is changed from “No. 10” to “15”.
Since the amount of change to “No. 5” is “No. 5”, the extraction order of the material 21 is changed from “13” to “18”, and
May be changed from “19” to “24”. Note that the number 24 is a value exceeding the final number, and therefore the number 21 is the extraction order of the material 25 although not shown. As described above, the extraction operation of the batch furnace and the heating furnace is performed normally, and the batch furnace can be used efficiently.

Further, as shown in FIG. 7, the order may be changed in consideration of the rolling efficiency. 6 is the same as that shown by reference C in FIG. 6, and as can be seen from this, as shown by reference I, the initial extraction order of the batch furnace extraction material (material 7). “No. 15” becomes “No. 13” by the processing described with reference to FIG. 6, and the scheduled extraction time is advanced. Therefore, if the material 7 is extracted at the scheduled extraction time, the rolling efficiency will be reduced.
For example, two materials corresponding to the time difference between the first extraction order and the new extraction order extracted after the material 17 are detected (reference numeral J) and stored in a furnace other than the heating furnace b (2). The extraction order of the extracted materials, specifically, the extraction order of the two materials, the material 22 and the material 23, is changed to the material 7
It is also conceivable that the extraction order comes before the extraction order. By performing such processing, the extraction operation of the batch furnace and the heating furnace is performed normally without lowering the rolling processing efficiency, and the batch furnace can be used efficiently. Note that an operation program is determined in advance so that the extraction order control unit 34 performs the extraction order change processing of the first mode as described above.

Next, a second mode of the extraction order changing process performed in step S250 will be described with reference to FIGS. 8, 9, and 10. FIG. The symbol L in FIG. 9 indicates the extraction order of the initially determined materials. Then, the extraction order “No. 10” of the material to be charged in the next batch furnace is not later than the extraction order “No. 15” of the material to be extracted in the batch furnace.
G ", and the extraction order changing process is performed.
First, in the present embodiment, weights are assigned to the materials in the heating furnace via the input unit 60, and the weights are stored in the storage unit 40. First, the weighting is performed as shown by the symbol Q in FIG.
In each heating furnace, the value of the weight is set so as to increase as going from the material extraction side to the charging side (sign). Also, the same weight value may be set for a plurality of materials, and the width (upper limit, lower limit) of the weight value may be set to any value from 0 to 1. Therefore, the lower limit “0” and the upper limit “1” of the weight shown in Q in FIG. 8 are merely examples.

However, as shown by the symbol R in FIG. 8, the weight of the material to be charged in the next batch furnace is assumed to be “1.0”, and the weight of the material in the same heating furnace and subsequent materials to be charged in the next batch furnace is also “1”. .0 ”(reference T). Therefore, the weight of the material 17 which is the material to be charged in the next batch furnace is “1.
0 ", and the weight of the materials 21 and 25 after the material to be charged in the next batch furnace in the same heating furnace b (2) is also" 1.0 ".
And keep it. Other materials may be set so that the weight value increases in each heating furnace from the material extraction side to the input side. Incidentally, as shown by the symbol M in FIG. 9, the materials 8 to 15 are "0.1",
Materials 16, 18, and 19 are "0.2", and materials 20, 22, and 22
24, 26, and 27 are given a weight of “0.3” in advance. As described above, the materials 17, 21, 25
Is pre-assigned a weight of “1.0”.

In the present embodiment, as shown by L in FIG. 8, the extraction order of the batch furnace extraction material (material 7) is fixed (“15”). First, the extraction order of the material to be charged into the next batch furnace (material 17) is set so that the extraction order of the material to be charged in the next batch furnace (material 17) is immediately after the material to be extracted in the batch furnace (No. 16). 10th to 16
The number of movements when moving to the “No.” (“No. 16−No. 10 = 6”) is obtained (reference O). The value obtained by multiplying the weight by the moving amount is obtained as the extraction order change amount for each of the materials stored in. If the multiplied value is a small number, round the value to the first decimal place,
The extraction order change amount is used. By the way, materials 9, 13, 17, 2
The extraction order change amounts of 1, 25 are “1”, “1”,
"6", "6", and "6". Then, the amount of change in the extraction order is added to the current value of the extraction order to obtain a new extraction order, and the extraction order of the materials stored in the other heating furnaces, that is, the heating furnaces 1, 3, and 4 is sequentially changed. Bring it down. The above is described in detail with reference to FIG. FIG.
As shown in (1), since the material 7 is a material to be extracted in a batch furnace, the extraction order is fixed ("No. 15") (1). Next, with regard to the material 9, the extraction order change amount "1" is added to the current extraction order "No. 2" to obtain an extraction order "No. 3" (2). Similarly, the current extraction order of materials 13, 17, 21, and 25 is “No. 6,” “No. 10,” “No. 14,” and “1.
No. 9 ”, the extraction order change amounts“ 1 ”,“ 6 ”,
"6" and "6" are added, and a new extraction order "7",
"No. 16", "No. 20" and "No. 25" are obtained ((3),
(4), (5), (6)). And heating furnaces 1, 3, 4
Sequentially lower the extraction order of the stored materials (7). Note that the extraction order control unit 34 performs the extraction order changing process of the second mode as described above,
An operation program is determined in advance. The extraction order obtained by such a process is as shown by reference numeral N in FIG. 10, and since the extraction order of the next batch furnace input scheduled material is later than the batch furnace extraction scheduled material extraction order, the heating furnace,
The charging and extracting operations to the batch furnace are performed normally, and the batch furnace can be used efficiently. Moreover, in the heating furnace in which the materials to be charged in the next batch furnace are stored, the order of the extracted materials after the materials to be charged in the next batch furnace is also determined so that the normal extraction operation is performed.

As described above, by performing the above-described extraction order changing process, the charging into the heating furnace and the batch furnace can be performed.
The extraction operation is performed normally, and the increase in the material extraction time interval due to the batch furnace restriction condition (size, etc.) is prevented, and the use efficiency of the batch furnace is improved.

[0023]

As described above, according to the first aspect of the present invention, the order of extraction from the heating furnace is determined in advance for each material to be heated, and the material is extracted from the heating furnace and put into the batch furnace. Then, the order of extraction of the material to be heated (first material to be heated: material A) extracted from the batch furnace from the batch furnace is determined by the order in which the material to be heated is extracted from the heating furnace and then put into the batch furnace. When the material (second material to be heated: N material) is later than the extraction order from the heating furnace, the extraction order of the second material to be heated from the heating furnace is changed to the batch of the first material to be heated. The order of extraction of each material to be heated from the heating furnace is changed so that it is later than the order of extraction from the furnace. Use of a batch furnace to prevent the material extraction time interval from increasing due to conditions (size, etc.) The rate is also improved.

According to the second aspect of the present invention, in the first aspect, in the step of changing the extraction order, the change of the extraction order is performed by weighting each material to be heated, The amount of movement of the heating material is obtained, and the value obtained by multiplying the weight of each material to be heated present in the heating furnace in which the second material to be heated is multiplied by the amount of movement is the amount of change in the extraction order of each material to be heated. In addition to the effect of claim 1, there is an effect that the order control in the same heating furnace can be appropriately performed.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram showing a schematic configuration 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 for explaining the processing content of the embodiment according to the present invention.

FIG. 7 is an explanatory diagram for explaining the processing content of the embodiment according to the present invention.

FIG. 8 is an explanatory diagram for explaining the processing content of the embodiment according to the present invention.

FIG. 9 is an explanatory diagram for explaining the processing content of the embodiment according to the present invention.

FIG. 10 is an explanatory diagram for describing the processing content of the embodiment according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 heating furnace a 2 heating furnace b 3 heating furnace c 4 heating furnace d 5 batch furnace 6 rough rolling mill 20 interface unit 30 extractor 31 extractor 34 extraction order control unit 36 extractor control unit 40 storage unit 50 display unit 60 input Part 100 control computer

Claims (2)

[Claims] 1. A method for controlling the order of extraction of materials to be heated present in a plurality of heating furnaces and batch furnaces, wherein the order of extraction from a heating furnace (including a batch furnace) is determined for each material to be heated. A step of preliminarily determining: a material to be heated (a first material to be heated: A) which is extracted from the heating furnace, introduced into the batch furnace, and further extracted from the batch furnace;
The order of extraction of materials from the batch furnace is later than the order of extraction of the material to be heated (the second material to be heated: N material) extracted from the heating furnace and put into the batch furnace from the heating furnace. At this time, each material to be heated is extracted from the heating furnace such that the order of extraction of the second material to be heated from the heating furnace is later than the order of extraction of the first material to be heated from the batch furnace. Changing the order, the method for controlling the order in which the materials to be heated are extracted. 2. The method according to claim 1, wherein in the step of changing the extraction order, the change of the extraction order is performed by weighting each of the materials to be heated in order to calculate the extraction order. Obtaining a moving amount of the extraction order when the order of extraction of the material to be heated from the heating furnace is immediately after the order of extraction of the material to be heated from the batch furnace; A value obtained by multiplying the weight of each of the materials to be heated present in the heating furnace by the amount of movement to an amount of change in the extraction order of each of the materials to be heated; and Setting a new extraction order by adding a corresponding extraction order change amount to a predetermined extraction order for each existing heating target material. How to control the order of extraction.