JP3391261B2 - Production planning method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a production planning method and apparatus for knitting a cast in continuous casting of metal such as steel.

[0002]

2. Description of the Related Art FIG. 13 is a side view showing a structure of a main part of a general continuous casting machine. Steelmaking processing (refining) from converter 101
Molten steel 103 stored in a container called ladle 102 through
After pouring in a kind of sauce called tundish 104 in 1 charge unit, mold 105 of a predetermined size and shape
The slab 106 is passed through the slab, hardened while gradually descending, cut into a predetermined length, and finished into a slab 106.

Molten steel 103 is a slab made by continuously pouring the next charge each time one charge is completed.
106 is made, but this charge is usually cast continuously for 2 to 10 charges. Such a continuous series of charges is called casting.

However, due to the characteristics of continuous casting, the internal structure is different at the front end (also called the bottom), the rear end (also called the top), and the middle of the cast, and each part has a predetermined finish quality, , Generally, the quality rank of joints of charges is low. It is important to determine a combination of charges (hereinafter referred to as cast knitting) in consideration of finishing quality according to the cast portion. For example, if the cast knitting is performed only by the weight of the charge without considering the portion with low finish quality such as the above-mentioned seam, the order outage occurs for the order request of the quality rank higher than this quality rank. Will result.

In response to such a need, a production planner has conventionally cast-knitted manually. However, because such cast formation requires considerable skill, not only was it possible for only a limited number of people to be involved in cast formation, but even a skilled planner would take a great deal of time to make that decision. There was a problem.

In order to solve this problem, JP-A-6-2475
In No. 16, gazettes in which material conditions such as steel grade are common are grouped, aligned according to the width dimension of these grouped slabs, and these slabs are divided into predetermined lengths and divided. The bottom, top, seams, etc. of the cast slab are ranked according to a predetermined quality standard, orders are assigned to these ranked parts according to the customer's quality requirements, and casting is performed according to the allocation result. A cast knitting method for correcting the length of a piece to a predetermined length based on its weight is disclosed.

Further, in Japanese Patent Laid-Open Publication No. 7-88605, the know-how of a person skilled in cast knitting as described above is applied to a slab by changing the mold width during casting by an expert system using IF-THEN type conditional statements. A cast knitting method is disclosed in which a cast knitting is provisionally determined according to a change in width dimension and the cast knitting that is provisionally determined based on a change in an operating state is corrected.

[0008]

However, the above two methods can be applied only to a slab that is cast-knitted based on the width dimension, such as a slab slab,
There is a problem that it cannot be applied to rods and pipes such as round billets and square billets.

The present invention has been made in view of the above circumstances, and prioritizes and rearranges sequentially according to the material (metal type, refining method), facility capacity, based on the information on the given charge. It is an object of the present invention to provide a production planning method and an apparatus thereof which can not only achieve automation of cast knitting by repeating it, but also can be applied to rods or pipes such as round billets and square billets. To do.

[0010]

A production planning method according to a first aspect of the present invention comprises a first step of grouping a plurality of charges in continuous casting into a group having the same metal species and refining method; 1st sorting condition, said refining method as 2nd sorting condition, 2nd step which sorts the grouping result of said 1st step by said group unit, and said group which follows before and after by the sorting result of said 2nd step A third step of determining whether or not it is possible, a fourth step of dividing the preceding and following groups into two groups when casting cannot be performed successively based on the determination result of the third step, and the refining method. As a sort condition,
A fifth step of sorting the grouping result of the sorting result of the second step or the division result of the fourth step, and whether or not the preceding and following groups can be successively cast by the sorting result of the fifth step. And a seventh step of adjusting the casting order of one or more charges in the corresponding group when continuous casting is not possible based on the determination result of the sixth step, and the seventh step. An eighth step of dividing / combining the group based on the equipment capacity in continuous casting based on the adjustment result of the step.

A production planning method according to a second aspect of the present invention is the production planning method according to the first aspect of the invention, in which the division / division in the eighth step is performed.
The method further comprises a ninth step of sorting the charges in each group of the combination result based on the quality condition.

A production planning method according to a third aspect of the present invention is the production planning method of the second aspect, wherein in the ninth step, each charge in each group of the division / combination results of the eighth step is within the group. The tenth step of calculating the weight in the charge that can be assigned to the portion with the lowest casting result quality, and for each charge, during the charge that can be assigned to the portion with the next lowest casting result quality in the group. Eleventh step of calculating the weight of
For each charge, the twelfth step of calculating the weight in charge associated with the order, and the tenth and eleventh steps.
And the multiple sort is performed on the calculation result of the 12th step.
The method is characterized by comprising 13 steps and a 14th step of allocating each of the charges to a portion corresponding to the quality of the casting result based on the multiplex sorting result of the 13th step.

A production planning apparatus according to a fourth aspect of the present invention is a grouping means for grouping a plurality of charges in continuous casting into a group having the same metal species and refining method, and the metal species as a first sort condition. Primary refining means for sorting the grouping results of the grouping means in units of the group using the refining method as the second sorting condition, and whether or not the preceding and succeeding groups can be successively cast by the sorting results of the primary sorting means. Primary determining means for determining, and a dividing means for dividing the preceding and following groups into two groups when continuous casting is not possible based on the determination result of the primary determining means, and the primary sorting using the refining method as a sorting condition. A secondary sorting means for sorting the sorting result of the means, or the division result of the primary dividing means in the unit of the group, and the secondary sorting means. In over preparative result, a secondary determining means for determining whether or not the group to which the front and rear can be cast communication people,
When continuous casting is not possible according to the determination result of the secondary determination means, adjusting means for adjusting the casting order of one or a plurality of charges in the corresponding group, and the adjustment result of the adjusting means for equipment in continuous casting Dividing / combining means for dividing / combining the groups based on capability.

A production planning system according to a fifth aspect of the present invention is the production planning system according to the fourth aspect of the invention, wherein the dividing / combining means is divided / combined.
It is characterized by further comprising a tertiary sort means for sorting the charges in each group of the combined result based on the quality condition.

A production planning apparatus according to a sixth aspect of the present invention is the production planning apparatus according to the fifth aspect of the present invention, wherein the tertiary sort means is provided in the group for each charge in each group of the division / joining results of the dividing / joining means. In the first calculation means for calculating the weight in the charge which can be assigned to the portion having the lowest quality of the casting result,
Second calculating means for calculating a weight in charge that can be assigned to a portion having the next lowest quality of casting result in the group, and third calculating means for calculating a weight in charge associated with an order for each charge. Computing means and the first,
Multiple sort means for performing multiple sorts on the calculation results of the second and third calculation means, and assigning means for assigning each of the charges to a portion according to the quality of the casting result based on the multiple sort result of the multiple sort means It is characterized by including.

According to the production planning method and the apparatus therefor of the first and fourth inventions, after a plurality of charges in continuous casting are grouped into a group in which the same charge having the same metal species and the same refining method is grouped, The groups are rearranged using the seed and refining method as the first and second conditions, respectively, and it is determined whether or not the preceding and succeeding groups can be continuously cast in terms of material.
Divide these groups when continuous casting is not possible,
Next, sort the groups based on the refining method only,
To determine whether or not continuous casting is possible again, and if continuous casting is not possible, in order to enable continuous casting of these groups,
Adjust the casting order of the charges in the group and
Since the number of groups should be reduced as much as possible without exceeding the facility capacity, for example, the structure is divided or combined based on the facility capacity of the continuous casting machine and its preceding and subsequent processes to form the cast knitting. Not only can it achieve automation, but it can also be applied to rods or pipes such as round billets and square billets.

According to the production planning method and the device thereof according to the second and fifth inventions, one or a plurality of members in the group (cast) finally organized in the production planning method and the device of the first and fourth inventions. Since the charges of (1) are rearranged based on the quality condition and cast knitting is performed, the cast knitting with higher production efficiency can be realized.

According to the production planning method and the device thereof according to the third and sixth inventions, the rearrangement in the production planning method and the device thereof according to the second and fifth inventions is performed for each charge in the above-mentioned group by the group. For example, the weight during charge that can be assigned to the part with the lowest casting result quality (finish quality), such as a seam, and similarly, during the charge that can be assigned to the next lowest casting result quality part. Since the weight and the weight in the charge associated with the order are calculated respectively, the calculation results are multi-sorted, and each charge is assigned to the part according to the finishing quality according to the multi-sort result, Not only quality conditions
It is possible to improve the efficiency of cast formation according to the order quantity.

The basic principle of the production planning method and apparatus according to the present invention will be described below. 2 to 8 are charts showing the data table 60. In addition, here, for the sake of simplification of the description, only two kinds of information of the steel type and the refining method (steel making processing method) are shown as the information for each charge.

The data table 60 shown in FIG. 2 is input with one charge as one record, and has a cast number, steel type, refining method, and charge number in record units. The cast No is a reference number, and the numbers are assigned in the input order here, and are 1, 2, ... From the upper end of the data table 60. The steel grade is indicated by a code that is a combination of numerical values, alphabets, etc. indicating the absolute value of the component value and the corresponding tolerance (relative value). This code is determined in advance with a certain regularity, and is determined so that adjacent codes in the order are the components of the steel type that most closely resembles, corresponding to the sorting function of a computer or the like, but in the present invention, It is not limited to this. In addition, in this embodiment, in order to simplify the description, it is shown by A, B, ... Further, similar codes are assigned to the refining method, and two types of RH and LH are shown, but it goes without saying that the present invention is not limited to this. Further, the charge number indicates the number of charges corresponding to each record, but here it is "1" indicating a single charge.

FIG. 9 and FIG. 10 are flow charts showing the cast scheduling procedure by the production planning method and apparatus according to the present invention. First, based on the steel type of the database 6 and the material information of the refining method, the above-mentioned data table 60 is grouped into records in which these are common as a material group (step 1).

As shown in FIG. 3, in the result of the grouping by step 1, for example, a plurality of records (cast No. 4, 8, ...) Of steel type “A” and refining method “RH” are integrated and integrated records. The total number of charges of "18" is the total number of charges, and it is a new record of cast No4.

Next, the material groups grouped in step 1 are rearranged based on the steel type and refining method (step 2). At this time, multiple sorts are performed with the steel type as the first sorting condition and the refining method as the second sorting condition. As a result, the records can be collected in the order in which the materials are closer.

In the result of the primary sorting in step 2, as shown in FIG. 4, the steel types are rearranged in the order of A, B, C, D, and the refining method is rearranged in the order of RH, LT, and the cast No. as a whole. Are rearranged to be 4, 3, 1, 6, 5, 2.

Next, based on the result of the primary sorting in step 2, it is determined whether or not continuous records of different steel types can be continuously cast (hereinafter referred to as continuous casting) (step 3). In other words, when two consecutive records are of different steel types, the boundary portion (seam) of these records causes the components to be mixed, so that this record can be used only for orders with a wide tolerance of component values. Since casting slabs that can be used cannot be assigned, casting cannot be performed one after another. However, in the case where the tolerances overlap between the two records, even if these records are cast continuously, the unusable charge can be reduced as much as possible, so that it is possible to cast continuously. Therefore, in step 3, for example, when the component values of two consecutive different steel type records and the ranges of their tolerances do not overlap,
It is determined that continuous casting is impossible, and when overlapping, it is determined that continuous casting is possible.

If continuous casting is impossible in step 3, the two records are divided (step 4). If continuous casting is possible, these records are not divided and the process proceeds to step 5 described later. The series of records organized in this way is hereinafter referred to as a "primary cast".

In the result of the primary cast organization in step 4, as shown in FIG. 5, the records surrounded by the thick frame constitute the primary cast as one block. Note that, here, the composition values of the steel types “C” and “D” are significantly different, and the records are divided between these records (between cast Nos. 5 and 2).

Next, rearrangement (secondary sorting) is performed in the primary cast formed in step 4 with only the refining method as the rearrangement condition (step 5). This allows
The same charge can be concentrated as much as possible in the refining method in the converter, which is the previous process of the continuous casting machine, and thus the manufacturing cost can be suppressed.

In the result of the secondary sorting in step 5, as shown in FIG. 6, the sorting is performed ignoring the steel type, and the cast Nos are sorted into 4, 6, 3, 1, 5. .

Next, it is determined in the same manner as in step 3 whether or not consecutive records of different steel types in the sorting result of step 5 can be cast successively (step 6).

If continuous casting is not possible in step 6, the primary cast is divided between these two records (step 7), and two new primary casts are knitted. However, as the number of casts increases, the number of interruptions in continuous casting also increases accordingly. In order to avoid this, subsequently, the combination of the order of the records in the primary cast is changed (step 8), and the processing from step 6 is repeated. Next, the combination capable of continuous casting and the corresponding primary cast number are stored in the storage device (step 9).

If continuous casting is possible in step 6, or after step 9, it is judged whether or not steps 6 to 9 have been completed for all primary casts (step 10), and for all primary casts. If not completed, return to step 6. If all the primary casts have been completed, then, of the combinations capable of continuous casting stored in the storage device described above, the combination with the smallest number of primary casts is selected (step 11). ).
The combination selected in step 11 is hereinafter referred to as a secondary cast.

In the result of the secondary cast knitting in step 9, as shown in FIG. 7, it is assumed that the two records of cast Nos. 3 and 5 are interchanged so that continuous casting is possible, and the number of casts is Not increasing.

Next, the knitted secondary cast is checked based on the preset continuous casting machine and the constraint conditions such as the facility capacity of the preceding and following processes (step 12). The number of durable charges of the mold in the continuous casting machine is determined as a constraint condition of the cast knitting. When casting exceeds the number of charges, the inner surface of the mold is worn by the casting, and the mold must be replaced. The degree of wear varies depending on the refining method, and in the present embodiment, the refining method is “R
"H" has 10 charges, and "LT" has 14 charges.

When the constraint condition is not satisfied in step 12, records exceeding this are divided to satisfy the constraint condition, and when the number of casts is increased as described above, continuous casting is performed accordingly. The records of the same refining method are combined to increase the number of interruptions in (step 13).

If the constraint condition is satisfied in step 12, or after step 13, it is checked whether or not steps 12 and 13 have been completed for all records (step 14). In this case, step 12 to step 14 are repeated. If it is completed, the data table 60 at this point is treated as a tertiary cast, and the process proceeds to step 15 described later.

In the result of the knitted tertiary cast knitting, as shown in FIG. 8, first, the upper refining method “RH” record is processed. The record of cast No4 has 18 charges, so the first 10 charges (cast
No41) and the remaining 8 charges (cast No42) are divided, and 10 charges of cast No41 are used as the first tertiary cast. Next, cast No42 was charged 8 times, so there is room for the remaining 2 charges, so the following cast No6 is split into the first 2 charges (cast No61) and the remaining 1 charge (cast No62). The first two charges are combined with the eight charges of the above-mentioned cast No. 42 to make a total of 10 charges as the second third cast. On the other hand, this time it is processed from the record of the refining method "LT" on the lower side. Cast No3 record has 10 charges
So, combining with the 4 charges of cast No 1,
It is as the third tertiary cast. Also, since there is no record of another refining method "LT" that is combined with the 2nd charge of cast No5, this 2nd charge is combined with the 1st charge of cast No62 described above to form the fourth tertiary cast. Even when two records with different refining methods are combined, it is confirmed whether or not the corresponding number of durable charges is exceeded, and if they are exceeded, these records are not combined.

Subsequently, the optimum charge order within each tertiary cast is determined (step 15), and the data table 60, which has been allocated as described above, is used as a quaternary cast (final cast), and this quaternary cast is organized. The result is output to the display device and stored in the storage device.

FIG. 11 is a flowchart showing details of step 15. Further, FIG. 12 is a schematic diagram showing the configuration of the tertiary cast, and shows the second tertiary cast described above.

At the top and bottom of the tertiary cast, as described above, the finish quality (finish quality) in continuous casting is inferior to the other portions (hatched portion in FIG. 12). In particular, when there are multiple cast Nos. In the tertiary cast, as in the second, third, and fourth tertiary casts shown in FIG. 8, a top that corresponds to two charges before and after continuous casting of different materials (seam) Or, the bottom will be further inferior in finishing quality (the cross hatched portion in FIG. 12). Therefore, the finish quality is usually set in the order of seam, top, and bottom.

Further, since materials of different quality grades are mixed in each actual charge, it is possible to assign the seam in each charge so as to first select the charge that can be assigned to the seam in each tertiary cast. Calculate the weight (ton) of quality grade material (step 15)
1). This can be achieved, for example, by preliminarily providing information about the quality grade of the order request in the data table 60 in parallel with each item such as the steel type and the refining method.

Then, similarly to step 152, the weight (ton) of the quality grade material that can be assigned to the top in each charge is calculated in order to select the charge that can be assigned to the top in each tertiary cast. Yes (step 152).

Furthermore, in each actual charge, there is a material with an order and a material with no order (also called a surplus material).
Therefore, in order to select the charge associated with the order in each tertiary cast, the weight (ton) of the material associated with the order within the charge is calculated (step 153).

Then, multiple sorts are performed in descending order with respect to the weight of each charge calculated in step 151, in ascending order with respect to the weight of each charge calculated in step 152, and in ascending order with respect to the weight of each charge calculated in step 153. (Step
154). As a result of this multiple sort, the first charge will be assigned to the bottom that is expected to have the poorest finish quality in the tertiary cast, and then the charge of the next rank will be the second worst finish quality. Allocate to the expected top, and assign the remaining charges between the top and bottom by performing ordering in consideration of the delivery date, the schedule of the front and rear processes of the continuous casting machine (step 155).

[0045]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. FIG. 1 is a functional block diagram showing the configuration of the production planning apparatus according to the present invention.

In FIG. 1, reference numeral 1 is an MPU, and the MPU 1 includes a keyboard 2, a ROM 3, a RAM 4, and a display device (CRT).
5 and the database 6 are connected.

The ROM 3 stores various programs used in the processing of the MPU 1, and the RAM 4 stores temporary data generated in the processing of the MPU 1. The CRT 5 also displays the processing status of the MPU 1.

From the keyboard 2, in addition to the information about the constraint conditions such as the equipment capacity of the continuous casting machine and the processes before and after it, the delivery time, the quality grade of the order request, the material information such as the steel type, the refining method (steel making processing method), etc. It has been input and is stored in the database 6 via the MPU 1. The database 6 stores these input information per charge in a data table having one record. This data table has a cast number as a reference number, a steel type, a refining method, and a charge number for each record.

The production planning apparatus according to the present invention has the above-described structure. First, the data table is stored in the database 6
Based on the steel type and the material information of the refining method in the imported data table, records common to these are grouped as a material group, and the grouped material groups are sorted according to the steel type and refining method ( Primary sort).

Next, based on the result of the primary sorting, it is determined whether or not continuous records of different steel types can be continuously cast (hereinafter referred to as continuous casting). If continuous casting is impossible, it is determined. If these two records can be divided and continuous casting is possible, these records are not divided, and are each "primary cast".

Next, in the knitted primary cast, sorting is performed using only the refining method as a sorting condition (secondary sorting), and whether or not consecutive records of different steel types in the secondary sorting result can be cast successively. If it is impossible to continuously cast, the primary cast is divided between these two records, two new primary casts are organized, and the primary cast is avoided in order to avoid an increase in the number of casts. After changing the combination of the order of each record in the above and repeating this for all the primary casts, the combination having the smallest number of primary casts is selected, and this combination will be referred to as a secondary cast hereinafter.

Then, the organized secondary cast is checked based on the constraint conditions such as the facility capacity, and if the constraint conditions are not satisfied, the constraint conditions are satisfied.
Records exceeding the number of records are divided, and when the number of casts increases as described above, the number of interruptions in continuous casting also increases, so that records of the same refining method are combined. Also, if the constraint conditions are satisfied,
The data table at this point is third-cast.

Next, the optimum charge order within each tertiary cast is determined, and the data table that has been allocated as described above is used as a quaternary cast (final cast), and the result of knitting of this quaternary cast is transferred to CRT 5. While outputting
Store in database 6.

[0054]

As described in detail above, in the production planning method and the apparatus therefor according to the present invention, after a plurality of charges in continuous casting are grouped into a group in which the same charge having the same metal species and refining method is grouped into a group. , The metal type and the refining method are respectively set as the first and second conditions, and the groups are rearranged, and it is determined whether or not the preceding and succeeding groups can be continuously cast due to the material. , And then rearrange the groups based only on the refining method, determine again whether or not continuous casting is possible, and if continuous casting is not possible, to enable continuous casting of these groups, Adjust the casting order of the charge inside,
The adjustment result, without exceeding the facility capacity, and so as to reduce the number of groups as much as possible, for example, by splitting or joining based on the facility capacity of the continuous casting machine and its preceding and subsequent processes, and cast-casting, Not only can automation of cast knitting be achieved, but it can also be applied to rods or pipes such as round billets and square billets.

Further, by further rearranging one or a plurality of charges in the group (cast) finally organized in the above-mentioned manner based on the quality condition and performing the cast formation, the cast formation with higher production efficiency is realized. can do.

Further, for each charge in the above-mentioned group, the weight in the charge that can be assigned to a portion having the lowest quality (finishing quality) of the casting result, such as a seam, in the group, and the casting in the same manner. The weight in charge that can be assigned to the next lowest quality of the result and the weight in charge associated with the order are calculated respectively, and the calculation results are multi-sorted, and each is sorted according to the multi-sort result. By allocating the charge to the portion corresponding to the finishing quality, the present invention has an excellent effect such that not only the quality condition but also the high efficiency of the cast knitting according to the order quantity can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a production planning apparatus according to the present invention.

FIG. 2 is a chart showing a data table.

FIG. 3 is a chart showing a data table.

FIG. 4 is a chart showing a data table.

FIG. 5 is a chart showing a data table.

FIG. 6 is a chart showing a data table.

FIG. 7 is a chart showing a data table.

FIG. 8 is a chart showing a data table.

FIG. 9 is a flowchart showing a processing procedure by the MPU involved in cast formation.

FIG. 10 is a flowchart showing a processing procedure by the MPU involved in cast formation.

FIG. 11 is a flowchart showing details of step 15.

FIG. 12 is a schematic diagram showing the structure of a tertiary cast.

FIG. 13 is a side view showing a configuration of a main part of a general continuous casting machine.

[Explanation of symbols]

1 MPU 2 keyboard 3 ROM 4 RAM 5 Display (CRT) 6 database

Continuation of the front page (56) Reference JP-A-7-88605 (JP, A) JP-A-7-204815 (JP, A) JP-A-6-328212 (JP, A) JP-A-9-235610 (JP , A) JP-A-6-247516 (JP, A) JP-A-5-19808 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B22D 11/16 B22D 11/10 B23Q 41/08 G06F 17/60

Claims (6)

(57) [Claims] 1. A first step of grouping a plurality of charges in continuous casting into a group having the same metal species and refining method, the metal species as a first sort condition, and the refining method as a second sort condition. A second step of sorting the grouping result of the first step in units of the group, and a third step of determining whether or not the preceding and subsequent groups can be successively cast by the sorting result of the second step, When continuous casting is not possible according to the determination result of the third step, a fourth step of dividing the preceding and following groups into two groups, and a sorting result of the second step using the refining method as a sorting condition, or A fifth step of sorting the division results of the fourth step in the group unit
A sixth step of determining whether or not the preceding and succeeding groups can be continuously cast based on the step and the sorting result of the fifth step.
Step, and if the result of the determination of the sixth step is that continuous casting is not possible, the seventh step of adjusting the casting order of one or more charges in the corresponding group, and the adjustment result of the seventh step Eighth step of dividing / combining the groups based on facility capacity in continuous casting. 2. The production planning method according to claim 1, further comprising a ninth step of sorting the charges in each group of the division / combination results of the eighth step based on quality conditions. 3. In the ninth step, for each charge in each group of the division / combination result of the eighth step, a weight during the charge that can be assigned to a portion having the lowest quality of the casting result in the group. 10th to calculate
An eleventh step of calculating a weight during a charge that can be assigned to a portion having the next lowest casting result quality in the group for each charge; and, for each charge, during a charge associated with an order. 12th step of calculating the weight of, the 13th step of performing multiple sorts on the calculation results of the 10th, 11th and 12th steps, and the respective charges based on the multiple sort result of the 13th step The production planning method according to claim 2, further comprising a fourteenth step of allocating to a portion according to a quality of a casting result. 4. A grouping means for grouping a plurality of charges in continuous casting into a group having the same metal species and refining method; and the metal species as a first sort condition,
Primary refining means that sorts the grouping results of the grouping means in units of the groups using the refining method as a second sort condition, and whether or not the preceding and succeeding groups can be successively cast by the sorting results of the primary sorting means. Primary determining means for determining whether or not, if the casting result cannot be continuously cast based on the determination result of the primary determining means, the dividing means for dividing the preceding and following groups into two groups, and the refining method as sorting conditions, the primary Whether or not the preceding and following groups can be successively cast by the sorting result of the sorting means or the secondary sorting means for sorting the division result of the primary dividing means in the unit of the group, and the sorting result of the secondary sorting means And a secondary determination means for determining, and one or more chars in the corresponding group when continuous casting is not possible with the determination result of the secondary determination means. And adjusting means for adjusting the casting order of,
A production planning apparatus, comprising: a division / coupling means for dividing / coupling the group based on an adjustment result of the adjustment means based on facility capacity in continuous casting. 5. The production planning apparatus according to claim 4, further comprising a tertiary sorting unit that sorts the charges in each group of the division / combining results of the dividing / combining unit based on a quality condition. 6. The tertiary sorting means, for each charge in each group of the division / coupling results of the division / coupling means, among the charges that can be assigned to a portion having the lowest quality of the casting result in the group. For each charge, a first calculation means for calculating a weight, a second calculation means for calculating a weight during charging that can be assigned to a portion having the next lowest casting result quality in each group for each charge, and each charge A third calculation means for calculating the weight in charge associated with the order, a multiple sort means for performing multiple sorts on the calculation results of the first, second and third calculation means, and multiplex of the multiple sort means The production planning apparatus according to claim 5, further comprising an assigning unit that assigns each of the charges to a portion corresponding to a quality of the casting result based on a sorting result.