JP7328164B2 - SIMULATION APPARATUS, SIMULATION METHOD AND SIMULATION PROGRAM - Google Patents

Description

The present invention relates to technology for simulating the number of secondary materials.

There is a technique for simulating the number of sub-materials used during and between processes in the process of processing work-in-progress through multiple processes to produce products. For example, Patent Literature 1 discloses a technique for calculating the number of secondary materials used within a predetermined period from the processing start time and processing end time of a job in the current process and the process immediately preceding the current process. ing.

JP 2019-219837 A

The number of secondary materials used calculated by the technique of Patent Document 1 is the "total" number of uses in a predetermined period. Since secondary materials are maintained and reused during the production process, the required number of secondary materials in the production process differs from the "total" usage of the secondary materials.

Since the types of secondary materials used differ for each production facility or product, the required number of secondary materials should be obtained for each type of secondary material, but the technique of Patent Document 1 does not take this into consideration. .

Secondary materials are maintained and reused in the production process of products, but secondary materials cannot be used during maintenance of secondary materials. Therefore, maintenance time for secondary materials should be taken into consideration, but the technique of Patent Document 1 does not take this into consideration.

The multiple processes may include a process (for example, a heat treatment process) in which secondary materials are not attached or detached from the work-in-progress. In this case, the use time of secondary materials continues from the next process onwards, so it should be possible to deal with processes in which secondary materials are not removed from work-in-progress. The technique of Patent Document 1 calculates the number of secondary materials used based on two processes, the previous process and the current process, so it cannot handle the case where a process in which secondary materials are not attached or detached from a work-in-process product is included.

SUMMARY OF THE INVENTION An object of the present invention is to provide a simulation apparatus, a simulation method, and a simulation program capable of calculating the required number of secondary materials for each type of secondary material while considering the maintenance time of the secondary materials.

A simulation device according to a first aspect of the present invention includes:
A device for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. an acquisition unit,
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The device further comprises:
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. A second data group creation unit that creates a group based on the first data group,
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The device further comprises:
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. With respect to data, a third data group creation unit for creating a third data group in which a plurality of the third data are arranged in chronological order according to the event time based on the second data group,
The third data group is created for each of the plurality of types of secondary materials,
The device further comprises:
Determination unit for determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. Prepare.

The first data group is, for example, the data group shown in FIG. The first data are rows that constitute this data group, and for example, "B, start of use" in the first row is one first data.

The acquisition unit may acquire the first data group by creating the first data group, or by reading the first data group stored in advance in the storage unit, A first data group may be obtained.

The second data group is, for example, the number increase/decrease table shown in FIG. The second data are rows that constitute the number increase/decrease table, and for example, "B, 1, blank" in the first row is one second data. The first status is the contents of the "in use" column of the number increase/decrease table. The second status is the contents of the "preparing" column of the number increase/decrease table.

The third data group is, for example, the data group shown in FIG. The third data are rows forming this data group, and for example, "1, 0, 1" in the first row is one third data. The first status cumulative sum is the contents of the "cumulative in use" column of this data group. The cumulative sum of the second status is the contents of the "preparing for accumulation" column of this data group. The sum of the cumulative total of the first status and the cumulative total of the second status is the content of the "cumulative total" column of this data group.

A third data group is created for each of a plurality of types of secondary materials. For example, the data group 216A shown in FIG. 16, the data group 216B shown in FIG. 17, and the data group 216C shown in FIG.

The present inventor paid attention to the fact that the sum of the cumulative total of the first status and the cumulative total of the second status (FIGS. 16, 17, and 18) changes according to the event time, and the maximum total It has been found that the value can be regarded as the required number of secondary materials. A simulation device according to the first aspect of the present invention is a device capable of calculating (determining) the required number.

Since the simulation apparatus according to the first aspect of the present invention includes the types of secondary materials in the parameters, it is possible to calculate the necessary number of secondary materials for each type of secondary materials.

In the simulation apparatus according to the first aspect of the present invention, parameters include completion of preparation (that the secondary material is maintained and made available again after the use of the secondary material is finished). It is possible to calculate the required number of secondary materials in consideration of time.

In the above configuration,
The secondary material is used over two or more consecutive steps included in the plurality of steps,
The event time of the start of use is the time when the first step among the two or more steps starts,
The event time of the end of use is the time when the last step among the two or more steps ends,
The event time of completion of preparation is a time obtained by adding a predetermined first time required for completion of preparation to the event time of end of use.

In this configuration, when secondary materials are used over two or more consecutive processes included in multiple processes, the event time for the start of use of secondary materials, the event time for the end of use of secondary materials, and the event time for the completion of preparation of secondary materials are set. Define how decisions are made.

The end-of-use event time of secondary materials is set to the end of the last process among two or more continuous processes. Therefore, when two or more continuous processes are two processes (when a process in which secondary materials are not attached or detached from a work-in-progress product is not included), for example, as shown in FIG. 8, the end-of-use event time is determined. When two or more consecutive processes are three or more processes (including a process in which secondary materials are not attached or detached from work-in-progress), for example, as shown in FIG. 10, the end-of-use event time is determined. Therefore, according to this configuration, it is possible to cope with a process in which secondary materials are not attached or detached from work-in-process products.

In the above configuration,
A plurality of the secondary materials are used in the first step,
After the first step, the plurality of secondary materials are used in separate steps,
In the plurality of secondary materials, the event time of the start of use is the time when the first process starts,
The event time of the end of use is determined for each of the plurality of secondary materials, and is the time at which the last process in each of the plurality of secondary materials ends,
The event time of completion of preparation is determined for each of the plurality of secondary materials, and is a time obtained by adding the first time to the event time of end of use of each of the plurality of secondary materials.

In this configuration, when a plurality of secondary materials are used in the first step of two or more consecutive steps (when the number of items is plural), for example, as shown in FIG. 9, for each of the plurality of secondary materials, An end-of-use event time and a ready-to-use event time are determined. Therefore, according to this configuration, it is possible to deal with a case where the number of items is plural.

In the above configuration,
The event time of the start of use is a time obtained by subtracting a second time from the time when the first step starts,
The second time is a predetermined time required for setting the secondary material to the equipment for processing the work-in-progress prior to the start of use of the secondary material.

If it is necessary to set the secondary material to the equipment that processes the work-in-progress before the secondary material is put into use, the secondary material cannot be used for another work-in-progress during the time required for setting. According to this configuration, the time required for setting is regarded as the time during which the secondary material is used, and the event time for starting the use of the secondary material is advanced by this amount of time. Therefore, it is possible to increase the accuracy of the required number of secondary materials.

A simulation method according to a second aspect of the present invention includes:
A method for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. comprising an acquisition step,
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The method further comprises:
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. A second data group creating step of creating a group based on the first data group,
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The method further comprises:
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. With respect to data, a third data group creating step of creating a third data group in which a plurality of the third data are arranged in chronological order according to the event time based on the second data group,
The third data group is created for each of the plurality of types of secondary materials,
The method further comprises:
Determination step of determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. Prepare.

The simulation method according to the second aspect of the present invention defines the simulation apparatus according to the first aspect of the present invention from the viewpoint of the method, and has the same effects as the simulation apparatus according to the first aspect of the present invention.

A simulation program according to a third aspect of the present invention includes:
A program for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. causing the computer to perform the acquisition step;
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The program further
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. causing the computer to execute a second data group creating step of creating a group based on the first data group;
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The program further
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. a third data group creating step of creating, based on the second data group, a third data group in which a plurality of the third data are arranged in chronological order according to the event time; and run
The third data group is created for each of the plurality of types of secondary materials,
The program further
Determination step of determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. is executed by the computer.

A simulation program according to the third aspect of the present invention defines the simulation apparatus according to the first aspect of the present invention from the viewpoint of the program, and has effects similar to those of the simulation apparatus according to the first aspect of the present invention.

According to the present invention, it is possible to calculate the required number of secondary materials for each type of secondary material while considering the maintenance time of the secondary materials.

1 is a block diagram showing the configuration of a simulation device according to an embodiment; FIG. In the embodiment, it is a flow diagram showing an example of a plurality of processes for which the required number of spools is calculated. It is a figure which shows an example of the scheduling result of these multiple processes in a tabular form. FIG. 4 is a diagram showing an example of a spool master in tabular form; It is a figure which shows an example of a preparation lead-time master in tabular form. FIG. 10 is a diagram showing, in tabular form, an example of a data group in which a spool type is set in a schedule result; FIG. 10 is a diagram showing, in tabular form, an example of a data group in which a spool event is set; FIG. 8 is a diagram in which the first to sixth rows are extracted from the data group shown in FIG. 7; FIG. 8 is a diagram in which the 1st to 6th, 7th, and 13th rows are extracted from the data group shown in FIG. 7 ; FIG. 8 is a diagram in which the 7th to 12th rows are extracted from the data group shown in FIG. 7; FIG. 10 is a diagram showing, in tabular form, an example of a data group in which data are rearranged for each spool event; FIG. 10 is a diagram showing, in tabular form, an example of a data group in which data are rearranged in descending order of event time; It is a figure which shows an example of a number increase/decrease table. FIG. 10 is an explanatory diagram for explaining how to create a number increase/decrease table; FIG. 10 is a diagram showing, in tabular form, an example of a data group in which the cumulative number of spools is set; FIG. 10 is a diagram showing, in tabular form, an example of a data group in which the cumulative number of spools of spool type A is set; FIG. 9 is a diagram showing an example of a data group in which the cumulative number of spools of spool type B is set, in tabular form; FIG. 9 is a diagram showing an example of a data group in which the cumulative number of spools of spool type C is set, in tabular form; FIG. 4 is a diagram showing the required number of spools for each spool type in tabular form. 4 is a flowchart for explaining the operation of the simulation device according to the embodiment; It is a flow chart of processing S3. It is a flow chart of processing S5. It is a figure which shows an example of the preparation lead-time master used by the modification of embodiment in a tabular form. FIG. 4 is a schematic diagram of a rolled coil mounted on a spool; FIG. 5 is an explanatory diagram for explaining the start of use of the spool, the end of use of the spool, and the completion of spool preparation;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In each figure, the configurations denoted by the same reference numerals indicate the same configurations, and the description of the contents of the configurations that have already been described will be omitted.

The simulation device, method, and program according to the present embodiment calculate in advance the required number of secondary materials used when processing work-in-progress through multiple processes. A coil obtained by rolling a thin steel plate or a non-ferrous thin plate (hereinafter referred to as a rolled coil) is taken as an example of a work-in-process product, and a spool is taken as an example of an auxiliary material.

FIG. 24 is a schematic diagram of a rolling coil mounted on a spool. A spool is a cylindrical auxiliary material used as the core of a rolled coil, and is necessary to prevent the rolled coil from slipping and to securely fix it to production equipment.

FIG. 25 is an explanatory diagram illustrating the start of use of the spool, the end of use of the spool, and the completion of spool preparation. This figure shows, as multiple steps, step N (rolling step), step N+1 (heat treatment step), step N+2 (cleaning step) and step N+3 (surface treatment step). The spool is attached to the rolling coil from the start of the current process to the end of the next process, after which it can be reused after performing necessary maintenance. There is also a process such as process N+1 in which the spool is not detached from the rolling coil. The type of spool that can be used is determined by the production equipment and product type. Suppose that there are a spool type A and a spool type B as types of spools.

Spools of spool type A are used in process N, process N+1 and process N+2. The start of use of the spool of spool type A is the start time of process N. The end of use of the spool of spool type A is the end time of process N+2. The completion of preparation for the spool of spool type A (end of maintenance) is when a predetermined time has passed since the end of use of the spool of spool type A.

A spool of spool type B is used in steps N+2 and N+3. The start of use of the spool of spool type B is the start time of process N+2. The end of use of the spool of spool type B is the end time of process N+3. The completion of preparation (end of maintenance) for the spool of spool type B is when a predetermined time has passed since the end of use of the spool of spool type B.

In an embodiment, given a production schedule or simulation results, we quantify how much of each type of spool is needed to execute it. As a result, it is possible to prepare the required number of spools in advance, thereby avoiding stoppage of product production due to shortage of spools.

FIG. 1 is a block diagram showing the configuration of a simulation device 100 according to an embodiment. The simulation device 100 includes an arithmetic processing unit 1 , a storage unit 2 , a data input/output unit 3 , an input unit 4 and an output unit 5 .

Arithmetic processing unit 1 is a hardware processor that performs various computations and various types of processing necessary for calculating the required number of spools. An order creating unit 13 , a number increase/decrease table creating unit 14 , a spool number accumulating unit 15 , and a required spool number determining unit 16 are provided. The arithmetic processing unit 1 includes hardware such as a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory) and HDD (Hard Disk Drive), programs for executing the functions of the above functional blocks, and Realized by data and the like.

The input unit 4 is a device for the user of the simulation device 100 to input various information, data, commands, and the like. The input unit 4 is implemented by a keyboard, mouse, touch panel, or the like.

The output unit 5 outputs simulation results and the like. The output unit 5 is implemented by a printer, a display device, or the like. The display device is, for example, a liquid crystal display or an organic EL display (Organic Light Emitting Diode display).

The data input/output unit 3 inputs the scheduling result 21 , the spool master 22 and the preparation lead time master 23 stored in the storage unit 2 to the arithmetic processing unit 1 . The scheduling result 21, spool master 22 and preparation lead time master 23 are created in advance by the user. When the user operates the input unit 4 to input these to the simulation device 100 , the data input/output unit 3 outputs them to the storage unit 2 . The storage unit 2 stores these output. The data input/output unit 3 is implemented by an input/output interface (input/output interface circuit).

The storage unit 2 has a function of pre-storing a scheduling result 21 , a spool master 22 and a preparation lead time master 23 . The storage unit 2 is realized by hardware such as flash memory and HDD.

The scheduling result 21 will be explained. FIG. 2 is a flow diagram showing an example of multiple processes for which the required number of spools is calculated in the embodiment. FIG. 3 is a diagram showing an example of the scheduling results 21 of these multiple processes in tabular form. With reference to FIGS. 2 and 3, a plurality of processes using facilities with facility CDs (equipment codes) M1 to M12 produce product numbers. is the work-in-progress of the product whose number is P1, the product No. is the work-in-progress of the product whose No. is P2; of the product whose No. is P1-1, and the product No. P1-1. is P1-2, the work-in-progress is processed. Product no. The work-in-progress of the product of P1 is split into two by a facility (for example, a slitter) of which the facility CD is M6. is P-1 and the product No. A work-in-progress of a product whose is P-2 is created.

The scheduling result 21 is the product number. column, column of process serial number, column of equipment CD, column of quantity, column of start time, and column of end time. How to view the scheduling result 21 will be described. With reference to the first line of the scheduling result 21, the product No. The work-in-progress of the product whose is P1 is processed by the equipment whose equipment CD is M1 in the step with the additional number 1. The number of members of this process is 1, the start time is April 1st at 10:00, and the end time is April 1st at 11:00. With reference to line 6, product no. is P1, the work-in-progress of the product whose equipment CD is M6 in the process with the additional number 6 is the product No. is P-1 and the product No. is divided into the work-in-progress of the product P-2, so the quantity is set to 2.

The spool master 22 will be explained. FIG. 4 is a diagram showing an example of the spool master 22 in tabular form. The spool master 22 has a product number. , a column of front equipment CD, a column of rear equipment CD, and a column of spool type. Product no. column is the product number of the scheduling result 21 . Shows the same content as the column of The previous equipment CD column shows the equipment CD of the equipment used in the current process in the current process and the next process (two continuous processes), and the post equipment CD shows the equipment CD of the equipment used in the next process. show. The spool type column indicates the types of spools used in the current process and the next process.

A view of the spool master 22 will be explained. Referring to the second line of the spool master 22, the product No. The work-in-progress of the product with P1 is processed in the current process using the equipment with the equipment CD of M2 and the next process using the equipment with the equipment CD of M3. A spool of spool type A is used in these steps. Therefore, the column for the front equipment CD is M2, the column for the rear equipment CD is M3, and the spool type column is A.

In the spool master 22, "*" indicates that the facility is not limited (any of the facilities whose facility CD is M1 to M12, or not necessarily these facilities). "↓" indicates that the spool is not attached or detached in the next process. Such installations are, for example, heat treatment furnaces, some reverse rolling mills. (U) indicates a spool used for shipping product. This spool is not included in the required number of spools.

The preparation lead time master 23 will be explained. FIG. 5 is a diagram showing an example of the preparation lead time master 23 in tabular form. After the spool is used, it is maintained and reused. The preparation lead time is a predetermined time (first time) required from the end of use of the spool until it becomes usable again, and is determined for each spool type.

Referring to FIG. 1, arithmetic processing unit 1 includes spool type setting unit 11, spool event creating unit 12, spool event order creating unit 13, number increase/decrease table creating unit 14, spool number accumulating unit 15, and a required spool number determination unit 16 .

The spool type setting unit 11 uses the data input/output unit 3 to read the scheduling result 21 and the spool master 22 from the storage unit 2, and refers to the spool master 22 to obtain data with the spool type set in the scheduling result 21. Group 211 is created. FIG. 6 is a diagram showing an example of the data group 211 in tabular form. The data group 211 has a spool type column added to the scheduling result 21 shown in FIG.

The spool event creation unit 12 uses the data input/output unit 3 to read the preparation lead time master 23 from the storage unit 2, and uses the preparation lead time master 23 (FIG. 5) and the data group 211 (FIG. 6) to , create a spool event, and create a data group 212 in which the spool event is set. FIG. 7 is a diagram showing an example of the data group 212 in tabular form. A data group 212 is obtained by adding a spool event column to the data group 211 shown in FIG. Spool events include start of use of spool, end of use of spool, and completion of spool preparation. The use start time is the time when use of the spool is started. The end-of-use time is the end-of-use time of the spool. The ready time is the time when the spool is ready.

Describes how to create a spool event. FIG. 8 is a diagram of the first to sixth rows extracted from the data group 212 shown in FIG. The usage start time is the processing start time of the current process. The use end time is the processing end time of the next process. However, if the next process is a process in which the spool is not attached or detached, it is the processing end time of the next process. This will be explained later. The preparation completion time of a spool event is the time obtained by adding the preparation lead time to the use end time.

A specific description will be given by taking the first line as an example. The usage start time is the start time in the first row. The usage end time is the end time on the second line. The preparation completion time is the time obtained by adding the preparation lead time (FIG. 5) for the spool type B to the use end time.

The usage start time, usage end time, and preparation completion time when the number of items is 2 will be described. FIG. 9 is a diagram of the first to sixth, seventh, and thirteenth lines extracted from the data group 212 shown in FIG. Product no. The work-in-progress of the product with P1 is the process with the serial number of 6, and the product No. is P1-1 and the work-in-progress and product No. is divided into the work-in-progress of the product P1-2, the number of pieces is set to 2. In this case, two spool events are set.

The usage start time is common to the two spool events and is the start time on the 6th line. The end time of use is the end time on the 7th line for the first spool event, and the end time on the 13th line for the second spool event. In the case of the first spool event, the preparation completion time is the time obtained by adding the preparation lead time of the spool type B on the sixth line to the use end time of the first spool event, and the second spool event In the case of , it is the time obtained by adding the preparation lead time for the spool type B on the 6th line to the use end time of the second spool event.

The end time of use in the next process, in which the spool is not attached or detached, will be described. FIG. 10 is a diagram of the 7th to 12th rows extracted from the data group 212 shown in FIG. In line 8, the spool type is set to "↓". This indicates that the spool is not attached or detached. Therefore, the end time of use on the seventh line is the end time on the ninth line. The spool event on line 8 is not set.

Based on the data group 212 shown in FIG. 7, the spool event order creating unit 13 creates a data group 213 in which the data are rearranged for each spool event. FIG. 11 is a diagram showing an example of the data group 213 in tabular form. A data group 213 is obtained by omitting the start time and end time columns from the data group 212 and rearranging the data collectively by spool event (start of use, end of use, completion of preparation).

Data group 213 includes product numbers. column, column of process number, column of equipment CD, column of quantity, column of spool type, column of time (event time), and column of event. The time (event time) is the time when the event occurs. The time (event time) column indicates the start time of use when the event is start of use, the end time of use when the event is end of use, and the completion time of preparation when the event is ready.

Based on the data group 213 shown in FIG. 11, the spool event order creating unit 13 creates a data group 214 (an example of a first data group) by rearranging data in order of earliest event time. FIG. 12 is a diagram showing an example of the data group 214 in tabular form. Referring to FIG. 12, the first data group includes an event, which is one of start of use, end of use, and completion of preparation of a secondary material (spool) that occurs during the execution of a plurality of processes, and a plurality of types of secondary events. First data (each row constituting the table in FIG. row "B, use start" is one first data), a data group in which a plurality of first data are arranged in time series according to the event time, which is the time at which an event occurs.

The spool type setting unit 11, the spool event creation unit 12, and the spool event order creation unit 13 constitute an acquisition unit 17 that acquires the first data group. In the embodiment, the acquisition unit 17 acquires the first data group by creating the first data group. The first data group may be obtained by reading.

The number increase/decrease table creation unit 14 creates a number increase/decrease table 215 (second data group) based on the data group 214 (first data group) shown in FIG. FIG. 13 is a diagram showing an example of the number increase/decrease table 215. As shown in FIG. The number increase/decrease table 215 is a group of data showing the increase/decrease in the number of spools by status (in use, in preparation).

With reference to FIG. 13, the second data group includes secondary material types (spool types A, B, and C), a first status (in use), and a second status (in preparation). With respect to the attached second data (each row constituting the table shown in FIG. 13; for example, the first row "B, 1, blank" is one second data), a plurality of second data according to the event time are arranged in chronological order.

For the first status (in use) and the second status (in preparation), if the event is in use, the first status (in use) is incremented by +1 at the same event time as the event. If the event is out of use, the first status (in use) is -1 and the second status (preparing) is +1 at the same event time as the event time of the event, and the event is In the case of preparation completion, the second status (preparing) is set to -1 at the same event time as the event time of the event.

FIG. 14 is an explanatory diagram for explaining how to create the number increase/decrease table 215. As shown in FIG. The number increase/decrease table 215 includes a time (event time) column, a spool type column, an in-use (first status) column, and a preparing (second status) column. is. The time column and the spool type column have the same contents as those columns of the data group 214 .

When the event column of the data group 214 indicates start of use, the in-use column is incremented by 1 at the same time (event time) as the event time (event time). The column in preparation is left blank, i.e. zeroed. When the event column of the data group 214 is "end of use", the "in use" column is set to -1 and the "in preparation" column is set to +1 at the same time (event time) as the event time (event time). When the event column of the data group 214 is ready, the preparing column is set to -1 at the same time (event time) as the event time (event time). The fields that are in use are left blank, or zeroed.

The spool number accumulator 15 uses the number increase/decrease table 215 shown in FIG. 13 to create a spool number accumulation, and creates a data group 216 in which the spool number accumulation is set. FIG. 15 is a diagram showing an example of the data group 216 in tabular form. The data group 216 is obtained by adding a column for cumulative number of spools to the number increase/decrease table 215 .

The cumulative column is composed of an in-use (first status) cumulative column, an in-preparation (second status) cumulative column, and a total cumulative column. The in-use cumulative column shows the in-use (first status) cumulative sum of the number increase/decrease table 215 . The cumulative total in preparation column indicates the cumulative total in preparation (second status) of the number increase/decrease table 215 . The Cumulative Total column shows the sum of the Active Cumulative Total and the Ready Cumulative Total.

The output unit 5 outputs the data group 216 . By viewing the data group 216, the user can know the number of spools in use and the number of spools in preparation at each time (event time).

The spool number accumulating unit 15 extracts the data of the spool type A from the number increase/decrease table 215 (second data group) shown in FIG. A data group 216A (third data group) in which the accumulation of is set is created. FIG. 16 is a diagram showing an example of the data group 216A in tabular form. A data group 216A is the data group 216 (FIG. 15) relating to the spool type A.

The spool number accumulating unit 15 extracts the data of the spool type B from the number increase/decrease table 215 (second data group) shown in FIG. A data group 216B (third data group) in which the accumulation of is set is created. FIG. 17 is a diagram showing an example of the data group 216B in tabular form. A data group 216B is the data group 216 relating to the spool type B.

The spool number accumulating unit 15 extracts the data of the spool type C from the number increase/decrease table 215 (second data group) shown in FIG. A data group 216C (third data group) in which the accumulation of is set is created. FIG. 18 is a diagram showing an example of the data group 216C in tabular form. A data group 216C is the data group 216 relating to the spool type C.

The third data group will be explained with reference to FIG. The third data group includes the first status cumulative total (cumulative in-use column), the second status cumulative total (cumulative ready column), the first status cumulative total and the second The third data linked with the cumulative total of the status (cumulative total column) (each row constituting the table shown in FIG. 16; for example, the first row “1, 0, 1” is the same 3rd data), a data group in which a plurality of 3rd data are arranged in time series according to event time.

The required number of spools determining unit 16 extracts the maximum value (here, 4) in the cumulative total column from the data group 216A (third data group), determines this as the required number of spools of the spool type A, and determines the data The maximum value in the cumulative total column is extracted from group 216B (third data group) (here 4), determined as the required number of spools for spool type B, and data group 216C (third data group) , the maximum value in the accumulated total column is extracted (here, 2), and this is determined as the required number of spools for spool type C.

The required number of spools determination unit 16 generates a table showing the determined required number, and the output unit 5 outputs this table. This table is shown in FIG. FIG. 19 is a table showing the required number of spools for each spool type. In the embodiment, to execute the scheduling result 21, a minimum of 4 spools of spool type A, a minimum of 4 spools of spool type B, a minimum of 2 spools of spool type C, It can be seen that a total of 10 are required.

The arithmetic processing unit 1 includes a spool type setting unit 11, a spool event creating unit 12, a spool event order creating unit 13, a number increase/decrease table creating unit 14, a spool number accumulating unit 15, and a required spool number determining unit 16. A program is stored for realizing each block. These are expressed as a spool type setting program, a spool event creation program, a spool event order creation program, a spool count increase/decrease table creation program, a spool count accumulation program, and a required spool count determination program.

Flowcharts of these programs executed by the CPU of the arithmetic processing unit 1 are shown in FIGS. 20, 21 and 22. FIG. These programs are expressed using definitions of function blocks. The spool type setting unit 11 and the spool type setting program will be described as an example. As described above, the spool type setting unit 11 reads the scheduling result 21 and the spool master 22 from the storage unit 2, refers to the spool master 22, and creates the data group 211 in which the spool type is set to the scheduling result 21. do. The spool type setting program is a program that reads the scheduling result 21 and the spool master 22 from the storage unit 2, refers to the spool master 22, and creates a data group 211 in which the spool type is set in the scheduling result 21. FIG.

The operation of the simulation device 100 according to the embodiment will be described. FIG. 20 is a flow chart explaining this operation. 1 and 20, the user operates input unit 4 to input scheduling result 21, spool master 22 and preparation lead time to simulation apparatus 100 (S1), and store them in storage unit 2. FIG.

The user operates the input unit 4 to input a simulation execution command to the simulation device 100 . As a result, the spool type setting unit 11 reads the scheduling result 21 and the spool master 22 from the storage unit 2, and creates a data group 211 (FIG. 6) in which the spool type is set (S2).

The spool event creation unit 12 reads the preparation lead time master 23 from the storage unit 2, creates a spool event using the preparation lead time master 23 (FIG. 5) and the data group 211 (FIG. 6), and creates the spool event. is set (S3).

FIG. 21 is a flowchart of processing S3. Referring to FIGS. 7 and 21, the spool event creating unit 12 selects all product numbers. product, the flow of FIG. 21 is executed. The spool event creating unit 12 first selects the product number. 21 is executed for one product.

The spool event creation unit 12 sets the process serial number N to 1 (S31). The spool event creation unit 12 determines whether the spool with the process serial number N (here, 1) is a spool that is not attached or detached or a spool for shipment (S32). That is, the spool event creation unit 12 determines whether the spool type column is "↓" or blank. The spool event creation unit 12 determines that the spool type of the process serial number 1 is "B" in the column of the spool type of the process serial number 1, so that the spool of the process serial number 1 does not correspond to either the spool that is not attached or detached or the spool for shipping (S32). No), and the process proceeds to step S34.

The spool event creation unit 12 determines the time to start using the spool with the process number N (here, 1) as the process start time for the process number N (here, 1) (S34). The spool event creating unit 12 sets the variable m to 1 (S35). The spool event creation unit 12 determines whether or not the spool with the process serial number N+m (here, the process serial number 2 (=1+1)) is a spool that is not detachable (S36). This is determined by whether or not a flag (“↓” in the embodiment) indicating a spool that is not detachable is set in the spool type column of the data group 212 .

Since the spool type column of process serial number 2 is "A", the spool event creation unit 12 determines that the spool of process serial number 2 is the spool to be detached (No in step S36), and proceeds to step S38. The spool event creation unit 12 determines the spool usage end time of process number N (here, 1) as the process end time of process number N+m (here, process number 2 (=1+1)) (S38). , the preparation completion time of the spool with the process number N (here, 1) is determined as the time obtained by adding the preparation lead time (FIG. 5) to the use end time of the spool with the process number N (here, 1) (S39 ).

The spool event creation unit 12 determines whether or not the process serial number N (here, 1) is the final process (S40). Since the process serial number 1 is not the final process (No in S40), the spool event creation unit 12 sets the process serial number to N=N+1 (here, N=2) (S41), and returns to the process S32.

When the spool event creation unit 12 determines that the process serial number N is the final process (Yes in S40), the next product number is generated. product, the flow shown in FIG. 21 is executed.

When the spool event creation unit 12 determines that the spool with the process serial number N is not detachable or the spool for shipping (Yes in S32), the spool event with the process serial number N is not set (S33). Then, the spool event creation unit 12 executes processing S40.

When the spool event creating unit 12 determines that the spool with the process serial number N+m is to be attached or detached (Yes in S36), it sets the variable m to m+1 (step S37) and returns to step S36. This corresponds to FIG.

Although not shown in the flow of FIG. 21, when the number of items is 2, the spool event creating unit 12 sets two spool events as described with reference to FIG.

Returning to the description of FIG. 1 and 20, spool event order creating unit 13 sorts the spool events (S4). This means creating a data group 213 (FIG. 11) based on the data group 212 (FIG. 7), and creating a data group 214 (FIG. 12) based on the data group 213. FIG.

The number increase/decrease table creation unit 14 creates the number increase/decrease table 215 (FIG. 13) based on the data group 214 (FIG. 12) (S5). FIG. 22 is a flowchart of processing S5. 14 and 22, number increase/decrease table creating unit 14 sets event k to 1 (S51). Event k is the event content shown in order from the first row in the data group 214 . For example, event 1 is the event content (start of use) on the first line, event 2 is the event content (start of use) on the second line, and event 3 is the event content (start of use) on the third line. , and event 4 is the event content (end of use) on the fourth line.

The number increase/decrease table creation unit 14 acquires the event content of the event k from the data group 214, and sets this as EV(k) (S52). Here, since it is event 1, EV(1) starts to be used.

The number increase/decrease table creation unit 14 sets the event time of EV(k) in the event time column of the number increase/decrease table 215, and sets the spool type of EV(k) in the spool type column of the number increase/decrease table 215 ( S53). Here, since it is EV(1), the event time of EV(1) is April 1, 10:00, and the spool type B of EV(1) is set in the first row of the number increase/decrease table 215 .

The number increase/decrease table creation unit 14 determines whether or not EV(k) has started to be used (S54). Here, since EV(1) has started to be used (Yes in S54), the number increase/decrease table creation unit 14 sets +1 in the in-use column of the first row of the number increase/decrease table 215 (S57).

When the number increase/decrease table creating unit 14 determines that EV(k) has not started to be used (No in S54), it determines whether or not EV(k) has finished being used (S55). When the number increase/decrease table creation unit 14 determines that EV(k) has finished being used (Yes in S55), it sets -1 in the in-use column of the number increase/decrease table 215 and adds +1 to the in preparation column. Set (S58). For example, in the case of event 4, -1 is set in the in-use column of the fourth row of the number increase/decrease table 215, and +1 is set in the in-preparation column.

When the number increase/decrease table creation unit 14 determines that EV(k) has not been used (No in S55), it determines whether EV(k) is ready (S56). When it is determined that EV(k) is ready (Yes in S56), the number increase/decrease table creating unit 14 sets -1 in the "in preparation" column of the number increase/decrease table 215 (S59). For example, in the case of event 7, -1 is set in the 7th row column of the number increase/decrease table 215 .

When the number increase/decrease table creation unit 14 determines that EV(k) is not ready (No in S56), or when one of the processes S57, S58, and S59 is executed, all spool events in the data group 214 is determined whether or not the setting in the number increase/decrease table 215 has been completed (S60). That is, it is determined whether or not the event in the last row of the data group 214 has been set in the number increase/decrease table 215 .

When the number increase/decrease table creation unit 14 determines that the setting of all the spool events in the data group 214 in the number increase/decrease table 215 has not been completed (No in S60), it sets k+1 to the event k (S61). . Then, the process returns to step S52. When the thread count increase/decrease table creating unit 14 determines that all the spool events in the data group 214 have been set in the thread count increase/decrease table 215 (Yes in S60), the process S5 ends.

1 and 20, the spool number accumulating unit 15 uses the number increase/decrease table 215 (FIG. 13) to create an accumulated number of spools for each spool type. The set data groups 216A, 216B, 216C (FIGS. 16, 17, 18) are created (S6).

Based on the data groups 216A, 216B, and 216C, the required spool number determination unit 16 calculates the required number of spools for each spool type (S7), and creates a table (FIG. 19) showing the results. The output unit 5 outputs this table (S9).

Main effects of the embodiment will be described. The inventors have found that the sum of the value in the cumulative in-use column (cumulative total) and the value in the cumulative in-progress column (cumulative total) (FIGS. 16, 17, and 18) changes according to the event time. , and found that the maximum total value can be regarded as the required number of spools. The simulation device 100 according to the embodiment is a device capable of calculating (determining) the required number.

Since the simulation apparatus 100 according to the embodiment includes the spool type as a parameter, it is possible to calculate the required number of spools for each spool type.

Since the simulation apparatus 100 according to the embodiment includes parameters for ready (that the spool will be maintained and made available again after the end of use of the spool), the need for the spool considering the maintenance time for the spool A number can be calculated.

A modification of the embodiment will be described. FIG. 23 is a table showing an example of the preparation lead time master 23 used in the modification. Preparation lead time includes pre-preparation lead time and post-preparation lead time. The post-preparation lead time is the preparation lead time shown in FIG. 5, and is the predetermined first time required from the end of use of the spool until it becomes ready for use again (time required for spool maintenance). .

The make-ready lead time is the second time required to set the spool in the equipment for processing work-in-progress (eg, the rolling mill shown in FIG. 25) before the spool is put into service.

In the case of the embodiment, when the spool event creation unit 12 (FIG. 1) creates the spool event (FIG. 7), the use start time is the start time of the current process (FIG. 8). On the other hand, in the case of the modified example, the use start time is the time obtained by subtracting the preparatory lead time from the start time of the current process. Referring to FIG. 8, for example, the use start time of process serial number 1 is from the start time of this process (current process) (10:00 on April 1) to the pre-preparation lead time of spool type B (1 hour ) is subtracted.

100 simulation device 214 data group (first data group)
215 number increase/decrease table (second data group)
216A data group (third data group)
216B data group (third data group)
216C data group (third data group)

Claims (6)

A device for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. an acquisition unit,
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The device further comprises:
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. A second data group creation unit that creates a group based on the first data group,
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The device further comprises:
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. With respect to data, a third data group creation unit for creating a third data group in which a plurality of the third data are arranged in chronological order according to the event time based on the second data group,
The third data group is created for each of the plurality of types of secondary materials,
The device further comprises:
Determination unit for determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. A simulation device. The secondary material is used over two or more consecutive steps included in the plurality of steps,
The event time of the start of use is the time when the first step among the two or more steps starts,
The event time of the end of use is the time when the last step among the two or more steps ends,
2. The simulation apparatus according to claim 1, wherein the event time of completion of preparation is a time obtained by adding a predetermined first time required for completion of preparation to the event time of end of use. A plurality of the secondary materials are used in the first step,
After the first step, the plurality of secondary materials are used in separate steps,
In the plurality of secondary materials, the event time of the start of use is the time when the first process starts,
The event time of the end of use is determined for each of the plurality of secondary materials, and is the time at which the last process in each of the plurality of secondary materials ends,
The event time of completion of preparation is determined for each of the plurality of secondary materials, and is a time obtained by adding the first time to the event time of end of use of each of the plurality of secondary materials. The simulation device according to claim 2. The event time of the start of use is a time obtained by subtracting a second time from the time when the first step starts,
4. The method according to claim 2 or 3, wherein the second time is a predetermined time required for setting the secondary material to the equipment for processing the work-in-progress before the start of use of the secondary material. simulation equipment. A method for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. comprising an acquisition step,
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The method further comprises:
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. A second data group creating step of creating a group based on the first data group,
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The method further comprises:
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. With respect to data, a third data group creating step of creating a third data group in which a plurality of the third data are arranged in chronological order according to the event time based on the second data group,
The third data group is created for each of the plurality of types of secondary materials,
The method further comprises:
Determination step of determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. A simulation method comprising: A program for simulating the required number of secondary materials used when processing work-in-progress through multiple processes,
An event occurring during the period in which the multiple processes are executed, which is either the start of use, the end of use, or the completion of preparation, and the type of the secondary material used in the event among the multiple types of secondary materials Acquiring a first data group in which a plurality of the first data are arranged in chronological order according to an event time, which is the time when the event occurs, with respect to the first data linked with a certain secondary material type. causing the computer to perform the acquisition step;
The completion of preparation means that the secondary material is maintained and made usable again after the end of use,
The program further
Second data obtained by arranging a plurality of the second data in chronological order according to the event time with respect to the second data in which the secondary material type, the first status, and the second status are linked. causing the computer to execute a second data group creating step of creating a group based on the first data group;
In the first status and the second status, when the event is the start of use, the first status is set to +1 at the event time that is the same as the event time of the event, and the event is the end of use, the first status is -1 and the second status is +1 at the event time that is the same as the event time of the event, and the event is the ready, the second status is set to -1 at the event time that is the same as the event time of the event;
The program further
The cumulative total of the first status, the cumulative total of the second status, and the total of the cumulative total of the first status and the cumulative total of the second status are linked. a third data group creating step of creating, based on the second data group, a third data group in which a plurality of the third data are arranged in chronological order according to the event time; and run
The third data group is created for each of the plurality of types of secondary materials,
The program further
Determination step of determining the maximum value of the sum in the third data group as the required number of the secondary materials for the third data group created for each of the plurality of types of secondary materials. is executed by the computer.

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