JP3458158B2 - Casting plan making method and casting plan making 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 casting plan making method and a casting plan making apparatus. More specifically, the present invention relates to a casting plan preparation method and a casting plan preparation device which can cope well with, for example, preparation of a melting furnace operation plan in precision casting.

[0002]

2. Description of the Related Art Recently, in various manufacturing industries, work plans and
Scheduling support software (hereinafter referred to as a scheduler) is widely used to support the creation of a process plan. Also, in the casting industry, the operation plan of the melting furnace when melting and casting the raw material metal (hereinafter also referred to as the melting plan) while automating the production line and reviewing the work procedure to improve production efficiency ) Has been required to be automated by using such a scheduler to save labor.

However, a melting plan, particularly a melting plan in precision casting, has a unique constraint in terms of continuous solubility and melting furnace life, unlike the process plan in general machining. That is, in precision casting that requires a high degree of component management of the material metal, for example, immediately after melting the material metal with a high carbon content, the same furnace is used to melt the high-purity material with a low carbon content as it is. There is a constraint that you cannot do it. In other words, in such a case, it is necessary to carry out a procedure in which a so-called dummy charge is connected and the material metal previously melted is washed off from the furnace, which causes a problem that work efficiency deteriorates.

FIG. 7 shows an example of a conventional casting operation plan formulation method (Japanese Patent Laid-Open No. 2000-126862). This operation plan formulation method creates an initial solution in which the tapping dates are provisionally arranged according to the casting request date for the given several days of casting work (step S101), and the order of each casting work of this initial solution. Are randomly replaced to create a temporary placement schedule (step S102), and the tapping time in each casting operation is calculated based on the constraints of the mold and the trolley with respect to the initial solution and each created temporary placement schedule (step S103), The evaluation value of each temporary placement schedule is calculated from the difference between the calculated tapping time and the desired casting date, and the evaluation value that is smaller than the predetermined value is searched for (step S
104) In this way, the process plan is to be established.

However, this conventional operation planning method is premised on that the casting request date of each casting operation has already been set, and the setting of the casting request date itself determines the outline of the schedule. Therefore, there is a problem that it is not meaningful as a scheduler that saves labor in planning. In addition, the order of each casting operation is randomly replaced without creating a significant guideline, and a temporary placement schedule is created, so it is easy to fall into a local solution, and the nature of the plan as the final answer is There is also the drawback that it is unknown.

Further, since the material of the material metal is not considered at all, and therefore the continuous solubility described above is not considered at all, there is a problem that it is difficult to deal with process planning especially in precision casting.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and can be applied to the production of a process plan in casting, particularly precision casting, and the plan production can be saved. An object is to provide a casting plan preparation method and a casting plan preparation device.

[0008]

Means for Solving the Problems The first aspect of the first aspect of the present invention
The aspect is a method for creating a casting plan in a casting facility having a required number of melting furnaces, and for each operable melting furnace, a casting plan that gives priority to delivery date is formulated for each divided time zone, and the obtained casting plan is created. casting planning method characterized by selected as a charge number of small not turn required number candidates tie.

A second aspect of the first aspect of the present invention is a casting plan creation method in a casting facility having a required number of melting furnaces, in which material priority is given to each operable melting furnace for each divided time zone. Create a casting plan and connect the obtained casting plans
Casting planning method characterized by electing as little has turn required number candidates charge number.

According to the first aspect of the present invention, an undertaking is possible.
Products are grouped according to material group and
Select the product with the shortest delivery time in the product group
From the start candidate list, the classification time for the melting furnace
From the start list of the products selected to be cast into the belt
It may be selected products to so that to match the number of charges in the charge number of soluble. However, the first
In the second aspect of the first aspect, the product that can be launched is made of a material.
Grouped according to
Of candidate products with the smallest delivery time
From the strike, cast into the relevant time zone in the melting furnace.
Select the product to
Select products to match the number of resolvable charges
If this is not possible, the product with the smallest number of charges or the product with the largest number of charges may be selected.

According to the first aspect of the present invention, an undertaking is possible.
Products are grouped according to material group and
Select the product with the shortest delivery time in the product group
From the start candidate list
Select products to be cast in the relevant time zone at the demolition furnace
And embarked list used comprising Te, each time the product contained in the embarked candidate list is selected on the undertaken lists, product of identical material group from among said deposition <br/> hand possible products
Therefore , it is preferable to extract the product with the smallest delivery deadline into the same move candidate list.

In the first embodiment of the present invention, the connection
If the charge number of tricks is the same number, a small sum of the delivery room
It is shall be adopted towards.

A first aspect of the second aspect of the present invention is a casting plan creating apparatus in a casting facility having a required number of melting furnaces, wherein delivery time is prioritized for each divided time zone for each operable melting furnace. Create a casting plan and connect the obtained casting plans
Casting planning apparatus characterized by comprising configured to elect as little has turn required number candidates charge number.

A second aspect of the second aspect of the present invention is a casting plan creation apparatus in a casting facility having a required number of melting furnaces, in which material priority is given to each operable melting furnace for each divided time zone. Create a casting plan and connect the obtained casting plans
Casting planning apparatus characterized by comprising configured to elect as little has turn required number candidates charge number.

According to the second aspect of the present invention, an undertaking is possible.
Products are grouped according to material group and
Select the product with the shortest delivery time in the product group
From the start candidate list, the classification time for the melting furnace
From the start list of the products selected to be cast into the belt
In so that to match the number of charges in the charge number of soluble it may be configured to select a product. However, the present invention
In the second aspect of the second aspect,
Grouped according to groups, each product group
Of the products with the smallest delivery deadlines among all
From the supplementary list, cast into the relevant time zone in the melting furnace.
The number of charges in the start list that is obtained by selecting the product to be processed
The product to match the number of charges that can be dissolved
If it is not possible to, it may be configured to smallest product charge quantity or charge selects the largest product.

According to the second aspect of the present invention, an undertaking is possible.
Products are grouped according to material group and
Select the product with the shortest delivery time in the product group
And the start candidate list for the melting furnace
Select the product that will be cast in the relevant time zone
Comprising a undertake list, each time the product contained in the embarked candidate list is elected the embarked list, product der the same as that of the material group from among the embarked possible product
Therefore, it is preferable that the product having the smallest delivery deadline is extracted in the same move candidate list.

In the second aspect of the present invention, the connection
If the charge number of tricks is the same number, a small sum of the delivery room
It is shall be adopted towards.

A first aspect of the third aspect of the present invention is a casting plan creation program in which each step of creating a casting plan in a casting facility having a required number of melting furnaces can be executed by a computer. procedures and embarked possible products the material group of the melting furnace with the <br/> each segment each time period to calculate the information on the furnace dissolvable number charge of each segment each time period
Follow the procedure for grouping according to
The most delivery time margin in each product group in each division time zone Te is less product and procedure to elect for each group, each
Among the products selected for each time zone for the melting furnace
The most affordable delivery time
And procedures to elect those few, is elected for each division time zone
A step of charging the number of connecting the product to set the dissolution order as most less that, ward by the dissolution order
Minutes Procedure for creating casting plan for each time zone
Formulate a casting plan for the day by combining casting plans for each zone
And the number of charges connecting the casting plan on the day
The present invention relates to a casting plan creation program, including a procedure for selecting a required number in ascending order .

A second aspect of the third aspect of the present invention is a casting plan creation program in which each procedure for creating a casting plan in a casting facility having a required number of melting furnaces can be executed by a computer. procedures and embarked possible products the material group of the melting furnace with the <br/> each segment each time period to calculate the information on the furnace dissolvable number charge of each segment each time period
According to each melting furnace, the procedure for grouping the melting furnace and the procedure for selecting the product with the smallest delivery deadline in each product group for each melting time zone, and the melting furnace for each time zone The connected char as a product to be cast during the relevant time zone from the products selected above .
The procedure of selecting the one having the smallest number of charges, the procedure of setting the melting order such that the number of charges connecting the products selected in each divided time zone is the smallest, and the melting order.
The procedure to create a casting plan for each time zone by
Casting on the day by combining casting plans for each time zone
The procedure for establishing the plan and the casting plan for the day are linked.
The present invention relates to a casting plan creation program, including a procedure for selecting a required number in ascending order of the number of charges .

[0020] In a third embodiment of the present invention, and a procedure for deleting a step of calculating a charge number greater than the number of soluble charged for each melting furnace, a charge number greater than the dissolvable number charge for each melting furnace It is preferably added.

Further, in the third embodiment of the present invention, those
Product with the same material group as the product selected for casting in the classification time zone, with the smallest delivery time margin
Preferably, a procedure for selecting a product is added.

[0022]

Furthermore, in the second aspect of the third embodiment of the present invention preferably comprises it contains steps of selecting a product so that to match the number of charges on the dissolvable number charge.

[0024] However, in the second aspect of the third embodiment of the present invention, if it is not possible to select a product to <br/> so that to match the number of charges on the dissolvable number charge, the smallest product charge number , Or the procedure of selecting the product with the highest number of charges.

A fourth aspect of the present invention relates to a computer-readable recording medium, characterized in that the casting plan creating program according to any one of the above is stored.

Here, the casting equipment is, for example, a precision casting equipment.

[0027]

Since the present invention is configured as described above, particularly in precision casting, even when an operation mode is adopted in which various material metals of different materials are melted and cast in the same melting furnace,
A reasonable and efficient melting furnace operation plan can be automatically created.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on the embodiments with reference to the accompanying drawings, but the present invention is not limited to such embodiments.

FIG. 1 shows a scheduling apparatus (hereinafter, referred to as a scheduling apparatus to which a casting plan creating method according to an embodiment of the present invention is applied.
(Scheduler) is shown.

The scheduler J is a casting plan preparation device for preparing a melting furnace operation plan (hereinafter also referred to as a melting plan) for melting and casting a material metal in casting.
Especially in precision casting, even if the operation mode is such that various material metals with different components are melted in the same melting furnace, the operation plan of the melting furnace is automatically created in order to carry out the work reasonably and efficiently. It is configured to be able to. The scheduler J is composed of a computer as hardware and peripheral devices connected to the computer, and a program that defines each processing procedure described below executed by the computer as software.

Specifically, the scheduler J has a data editing unit 10, a database unit 20, a master data extraction unit 30, a melting furnace operation data input unit 40, and a plan creation processing unit 50 as main components. Be prepared. In addition, the scheduler J is a CRT (Cathode-Ray
A display unit 60 including a display device such as a tube (cathode ray tube) or a liquid crystal display device, and an operation unit 70 including an operation input device such as a mouse and a keyboard are connected.

The data editing section 10 includes a database section 20.
Data input processing for inputting various information described later and data editing processing for editing various information input to the database unit 20 are performed. More specifically,
The data editing unit 10 is configured to perform a data input process and a data editing process by displaying a tabular interface corresponding to the data structure of each of the databases constituting the database unit 20 on the display unit 60. It

As shown in FIG. 2, the database unit 20 has a product master data 21 in which information about each product to be manufactured is made into a database, a melting furnace master data 22 in which information about each melting furnace is made into a database, and each product. Material master data 23 that is a database of information about the material and product data 24 for each mold that is a database of information about products that are cast in each mold for a mold that can be cast on a planning target day (hereinafter referred to as the current day) Including and

The product master data 21 stores information on each item such as product name, number, tree number, material name, presence / absence of in-furnace analysis, melting weight, casting weight, and melting furnace name for each product. . Here, the tree is a tree-shaped structure in which small molds are connected to each other.
If the number of trees is 3 and the number of trees is 3, 10 can be set for one tree.
Individual products will hang and can be cast with 3 charges. Further, the in-furnace analysis refers to the composition analysis work of molten metal, and the molten weight refers to the weight of the entire product,
The casting weight means the weight of the product for one mold.

The melting furnace master data 22 stores information on each item such as the melting furnace name, the minimum melting weight, and the charging time for each melting furnace. Here, the charge time means a series of steps from the start of the material metal melting furnace to the melting of the material metal and the completion of the injection of the melted metal into the mold (hereinafter referred to as this A series of steps is called "charging".

The material master data 23 stores information on each item such as a material name and a material group name for each product. Here, the material group name refers to the name given to each group of similar materials. For example, the heat-resistant cast steel is given the name SC group.

The mold-specific product data 24 stores information on each item such as a product name, a casting deadline, a starting priority, a meltable section time zone, and a special item for each product manufactured by each mold. Here, the priority of starting means a parameter set for each product according to the casting deadline.
For example, if the current day is the casting deadline, the priority of the launch is set to the value "1", and the other values are set to the value "0". In addition, as special notes, "cover after casting", "1000
Special information associated with the processing such as "preheat for 5 hours at 0 ° C" is stored.

Each data forming the database section 20 is stored and saved in an external storage device (also called an auxiliary storage device, eg, hard disk) of the computer.

Next, the master data extraction unit 30 will be described. The master data extraction unit 30 extracts, from the database unit 20, each data required when executing the plan creation processing described below, as necessary. The extracted data is
The program is read into a main memory (also called a main storage device or an internal storage device, eg, RAM) of a computer and processed by the plan creation processing unit 50.

The melting furnace operation data input section 40 is used for information on the operability / operation status of each melting furnace (hereinafter, referred to as melting furnace operation data, eg; material group name of the last charge material on the previous day, operation on the morning of the day) Perform the data input process to input the time and the available operation time in the afternoon of the day. More specifically, the melting furnace operation data input unit 40 is
A fill-in-sheet type interface is displayed on the display unit 60 to serve as an editor for inputting melting furnace operation data. The input data is read into the main memory described above and processed by the plan creation processing unit 50.

The plan preparation processing section 50 carries out a plan preparation process. The planning process will be described below.

FIG. 3 shows an outline of the planning process. This planning process includes the procedures of the following steps.

Step S1: Create a list of operable melting furnaces. That is, based on the melting furnace operation data of all melting furnaces input by the melting furnace operation data input unit 40, all the melting furnaces whose operable time on the day is larger than the value “0” are extracted to operate. Create a list of possible melting furnaces.

Step S2: Each melting furnace is sequentially selected from the operable melting furnace list. Here, each melting furnace included in the operable melting furnace list is selected in all permutations. Further, for each melting furnace selected in this step S2, each procedure of steps S3 to S6 described below is performed.

Step S3: A section time zone is selected for each melting furnace selected in step S2. That is, a divided time zone that divides the work time zone of one day is set in advance (for example, morning and afternoon), and this divided time zone is sequentially selected. Then,
The procedures of steps S4 and S5 described below are performed for each of the selected divided time zones.

Step S4: A segment delivery date priority plan preparation process (see FIG. 4) for preparing an operation plan for each smelting furnace with priority given to the delivery schedule for each segment time zone. This divisional delivery date priority plan creation processing will be described later.

Step S5: A segmented material priority plan preparation process (see FIG. 6) for preparing an operation plan for each melting furnace in which the material is preferentially taken into consideration is executed for each segmented time zone. This classification material priority plan creation processing will be described later.

Step S6: For the melting furnace selected in Step S2, Step S
It is determined whether or not each procedure of 4 and step S5 has been performed. When the procedures of step S4 and step S5 have been carried out for all the divided time zones, the process proceeds to step S7, and when not performed, the process returns to step S3.

Step S7: It is determined whether or not the procedure of steps S3 to S6 has been carried out for each melting furnace in all the permutations of step S2. If the steps S3 to S6 have been performed for all melting furnaces, the process proceeds to step S8. If not, step S8 is performed.
Return to 2.

Step S8: Combining the plans for each division time zone, which is the processing result of the divisional delivery priority plan preparation processing of the above-mentioned Step S4, to formulate the plan of the day, and select from the prepared plans. A predetermined number (for example, a predetermined number (for example, a product) that includes a plan that does not include a product with a high priority of launch (eg, a product with a priority of “1” for launch) A delivery priority plan is created by selecting five (5) plans and displayed on the display unit 60.

As a concrete example, when 5 kinds of plans are obtained in the morning of the day and 5 kinds of plans are obtained in the afternoon of the day, there are 25 (5 squared) kinds of plans obtained as a combination thereof. For example, five highly evaluated plans are selected in that order, and each selected plan is output as a delivery priority plan on the day.

Step S9: Combining the plans for each classification time zone, which is the processing result of the classification material priority plan creation process of the above-mentioned step S5, to formulate the plan of the day, and select from the prepared plans. A predetermined number (for example, a predetermined number (for example, a product) that includes a plan that does not include a product with a high priority to start (eg, a product with a priority of “1” to start) The material priority plan is created by selecting (5) plans, and displayed on the display unit 60.

As a concrete example, when 5 kinds of plans are obtained in the morning of the day and 5 kinds of plans are obtained in the afternoon of the day, 25 (5 squared) kinds of plans obtained as a combination thereof are obtained. For example, five highly evaluated plans are selected in that order, and each selected plan is output as a material priority plan on the day.

Next, the divisional delivery date priority plan preparation process of step S4 will be described.

FIG. 4 shows an outline of the segment delivery date priority plan preparation processing. The segment delivery date priority plan creation process includes each procedure of the following steps.

Step S11: For each melting furnace i selected in the above-mentioned step S2, the number N _Ai of _meltable charges in each divided time zone selected in step S3 is calculated by the following formula (1).

N _Ai = Int [T _Mi ÷ T _Ci ] (1)

Here, Int indicates an integer value, T _Mi indicates the operable time of the melting furnace in the relevant time zone, and T _Ci indicates the time required for one charge (hereinafter,
Charge time).

Step S12: All products that can be melted in the melting time in the melting furnace, that is, products that are to be manufactured, molds are already available, and melting plan is undecided. (Hereinafter, referred to as products that can be started) are extracted, the extracted products that can be started are divided into groups according to the material group, and the product with the smallest delivery deadline is selected from each product group, and the start candidate list is selected. create.

Step S13: Select one product having the smallest delivery deadline among the products included in the start candidate list,
Add to the move list. Here, the start list refers to a list of products selected to be cast in the smelting furnace in the relevant time zone.

Step S14: The melting order is set so that the dummy charge is minimized when melting each product in the start list in the melting furnace i. Here, the dummy charge is to wash the previous material metal from the melting furnace so that the material metal that is melted later does not mix with the material metal that is melted later when the metals of different materials are melted continuously. It is a connection charge made for the purpose of.

As a concrete example, each product has A, B, C, D,
Fig. 5 is classified into product groups (hereinafter simply referred to as "groups") corresponding to each material group of E and between each group.
Consider the case where there is a relationship shown in. That is, group A
When dissolving either the product of group B or group C after dissolving the product of No. 1, no dummy charge is required, and when dissolving the product of group C or group D after dissolving the product of group B Does not require a dummy charge, and does not require a dummy charge when melting one of the products of group B and group D after melting the product of group C, the product of group E after melting the product of group D Does not require a dummy charge when melting, and does not require a dummy charge when melting a group E product after melting a group E product,
In all other cases, it is necessary to carry out a dummy charge.
It is assumed that there is a relationship.

In this case, products belonging to groups A, B, C, D, and E are arranged in this order, assuming that, for example, the products of each group of A to E are present in the start list one by one. However, it is regarded as one of the melting orders having the smallest number of dummy charges with the number of dummy charges being “0”. In this step S14, such a dissolution order that the number of dummy charges is the smallest is searched for, and this procedure is ended when one is determined. In this case, if there is no dummy charge number having a value of “0”, search for a dummy charge number having a value of “1”, and if there is no dummy charge number having a value of “1”, dummy charge The search is performed in such a manner that a search is performed for a number whose value is "2".

Step S15: The unprocessable charge number N _F1i is calculated by the following equation (2).

N _F1i = N _L1i −N _Ai (2)

Here, N _L1i is the number of charges (including the number of dummy charges) required to dissolve all the products included in the start list.

Step S16: Number of unprocessable charges N _Fi
It is determined whether the value is “0” or more. When the number N _F1i is smaller than the value “0”, it is determined that the product can be further added to the start list, and the process returns to step S12.
If the number N _F1i is greater than or _equal to the value “0”, it is determined that the product cannot be added to the move list any more, and the process proceeds to step S17.

Step S17: Number of unprocessable charges N
_{When F1i} is larger than the value “0”, the number of charges corresponding to the number N _F1i added to the start list immediately before is deleted. That is, the excess is deleted. As a specific example, immediately before, the number N _F1i has the value “3”, the number of charges of the product added to the _move list at this time is “5”, and the dummy charge by adding this product to the move list is used. If there is no increase in the number, 2 (= 5-3) charges of the product are deleted.

Step S18: Evaluate the plan draft (hereinafter referred to as the delivery priority plan draft) obtained for each permutation of step S2 by executing the procedure of steps S11 to S17 by the evaluation function of the following formula (3). Then, a predetermined number (for example, 5) is sequentially selected in descending order of evaluation.

Min (N _D ) (3)

Here, N _D is the number of dummy charges included in the delivery date priority plan.

That is, in step S18, the high-efficiency delivery date priority plan with a small number of dummy charges is sequentially selected.

Next, the classification material priority plan preparation process will be described.

FIG. 6 shows an outline of the classification material priority plan preparation process. The classification material priority plan preparation process includes each procedure of the following steps.

Step S21: For each melting furnace i selected in step S2, the number of _meltable charges N _Ai in each divided time zone selected in step S3 is calculated in the same manner as in step 11.

Step S22: All the products that can be melted in the melting time period in the melting furnace i, that is, the products that can be started are extracted, and the extracted products that can be started are grouped according to the material group. The start candidate list is created by selecting the product with the smallest deadline in each product group.

Step S23: The product is set to 1 so that the number of dummy charges is the smallest among the products in the start candidate list.
Select one and add it to the move list. That is, one product is selected in order to search for a combination that can minimize the number of dummy charges by repeating the procedure of this step S23 and steps S24 to S26 described below. At this time, the following policies (a) and (b) will be followed.

(A) A product having an unprocessable charge number N _F2i of "0" in step S27 described later is selected. This is to eliminate as much work as possible.

(B) If there is no product according to the policy of (a) above, the product with the smallest number of charges or the product with the largest number of charges is selected. This is to complete the small quantity product first or to start the large quantity product first.

Step S24: The melting order is set so that the dummy charge is minimized when melting the products in the starting list in the melting furnace. Similar to step S14, this procedure is terminated when one dissolution order that minimizes the number of dummy charges is determined.

Step S25: The unprocessable charge number N _F2i is calculated by the following equation (4).

N _F2i = N _L2i −N _Ai (4)

Here, N _L2i is the number of charges (including the number of dummy charges) required to dissolve all the products included in the start list.

Step S26: Number of unprocessable charges N
It is determined whether _F2i is greater than or _equal to the value "0". When the number N _F2i is smaller than the value “0”, it is determined that the product can be added to the move list, and the process returns to step S22. If the number N _F2i is greater than or _equal to the value “0”, it is determined that the product cannot be added to the move list, and the process proceeds to step S27.

Step S27: Number of unprocessable charges N
_{When F2i} is larger than the value “0”, the product charges added to the _move list immediately before are deleted by the number N _F2i .

Step S28: An evaluation function represented by the following equation (5) is a plan (hereinafter referred to as a material priority plan) for each permutation of step S2 obtained by executing the procedure of steps S21 to S27. And evaluate a predetermined number (for example, 5) of material priority plans. However, although the evaluation function has the same number of dummy charges, it is used to determine the superiority or inferiority. If there is a small number of dummy charges, it will be preferentially selected.

Min (T _D ) (5)

Here, T _D is the sum of delivery deadlines of the products included in the start list in each material priority plan.

As described above, the scheduler J of this embodiment gives priority to materials for all plans (delivery priority plan) which satisfy the predetermined standard set by giving priority to the delivery allowance. All plans that perform evaluation based on the criteria and select a plan based on this result to create a delivery date priority plan, and that clear the specified standards set by giving priority to the material ( Material priority plan) is evaluated based on the priority of delivery date, and the material priority plan is created and presented by selecting the plan based on this result, so precision casting field where advanced material management is required It is possible to automatically create a rational and efficient process plan in.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the embodiments and various modifications can be made. For example, although the result is displayed on the display unit in the embodiment, it may be printed out.

[0091]

As described in detail above, according to the present invention,
Especially in precision casting, even when the operation mode is such that various material metals with different materials are melted and cast in the same melting furnace, a rational and efficient melting furnace operation plan is automatically created. The excellent effect of being able to be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a scheduler to which a casting plan creating method according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram showing a configuration of a database unit of the scheduler.

FIG. 3 is a flowchart showing an outline of casting plan creation processing.

FIG. 4 is a flowchart showing each procedure of a segment delivery date priority plan creation process.

FIG. 5 is a schematic diagram showing a specific example of necessity / unnecessity of dummy charge.

FIG. 6 is a flowchart showing each procedure of a classification material priority plan creation process.

FIG. 7 is a flowchart showing each processing procedure of a conventional casting plan creation method.

[Explanation of symbols]

10 Data editor 20 Database Department 21 Product master data 22 Melting furnace master data 23 Material furnace master data 24 Product data by mold 30 Master data extraction unit 40 Melting furnace operation data input section 50 Planning process unit

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junaki Matsumoto 1-1 Kawasaki-cho, Akashi-shi Kawasaki Heavy Industries Ltd. Akashi Factory (72) Inventor Yoichi Nagao 1-1 Kawasaki-cho Akashi-shi Kawasaki Heavy Industries Ltd. Akashi In-house (72) Inventor Hideaki Ota 1-1 Kawasaki-cho, Akashi City Kawasaki Heavy Industries Ltd. Akashi Factory (72) Inventor Koichi Fukumoto 1-1 Kawasaki-cho Akashi-shi Kawasaki Heavy Industries Ltd. Akashi Factory (72) Invention Mitsuru Mizuno 1780 Kamikono, Yachiyo-shi, Chiba Kawasaki Heavy Industries, Ltd. Yachiyo Factory (56) References JP 2001-34672 (JP, A) JP 2000-315109 (JP, A) JP 6-315762 (JP, A) JP 4-143859 (JP, A) JP 2002-69521 (JP, A) JP 2001-321928 (JP, A) JP 2001-287024 (JP, A) JP 2000 -237865 (JP, A) JP 2000-126862 (JP, A) JP 9-38766 (JP, A) JP 8-164476 (JP, A) JP 5-277713 (JP, A) JP 62-164811 (JP, A) JP 2002-333911 (JP, A) JP 2001-9677 (JP, A) JP 11-314146 (JP, A) JP 6-35920 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B22D 46/00 G06F 17/60

Claims (21)

(57) [Claims] 1. A method for creating a casting plan in a casting facility having a required number of melting furnaces, wherein a casting plan with priority for delivery date is formulated for each operable melting furnace and the obtained casting is obtained. Charge to connect plans
Casting planning method characterized by electing as little has turn required number candidate number. 2. A method for creating a casting plan in a casting facility having a required number of melting furnaces, wherein a casting plan in which material is prioritized is established for each operable melting furnace for each time zone Charge to connect plans
Casting planning method characterized by electing as little has turn required number candidate number. 3. According to the material group of the products that can be launched
According to each product group, the most affordable delivery time
From the list of candidates
Select the products to be cast in the melting furnace in the relevant time zone.
Char that can dissolve the number of charges on the embarked list
Casting planning method according to claim 1, wherein selecting a product so that to match the di number. 4. According to the material group of the products that can be launched.
According to each product group, the most affordable delivery time
From the list of candidates
Select the products to be cast in the melting furnace in the relevant time zone.
Char that can dissolve the number of charges on the embarked list
3. The casting planning method according to claim 2 , wherein when the product cannot be selected so as to match the number of charges, the product having the smallest number of charges or the product having the largest number of charges is selected. 5.According to the material group
According to each product group, the most affordable delivery time
List of candidates to start with a selection of products with few From the start candidate list in the melting furnace in the relevant time zone
Use the start list to select the products to be cast
I The above The products included in the start candidate listThe aboveTo the start list
Every time I was selectedPrevious RecordIt is the same as the product that can be launched.
Products in one material groupAnd the smallest delivery deadline
ProductsTosameCharacterized by extracting to the start candidate list
The casting plan creation method according to claim 1. 6. If the charge number of the connecting of a tie, delivery extra
Claim 2 casting planning method, wherein that you adopt towards sum of Hiroshi small. 7. The method of claim 2, 3, 4, 5 or 6 casting planning method according to, characterized in that the casting facility is formed by a precision casting equipment. 8. A casting plan creation device for a casting facility having a required number of melting furnaces, wherein a casting plan with priority delivery date is formulated for each operable melting furnace and the obtained casting is obtained. Charge to connect plans
Casting planning apparatus characterized by comprising configured to elect as little has turn required number candidate number. 9. A casting plan creation device in a casting facility having a required number of melting furnaces, wherein a casting plan that prioritizes materials for each time zone is established for each operable melting furnace, and the obtained castings are obtained. Charge to connect plans
Casting planning apparatus characterized by comprising configured to elect as little has turn required number candidate number. 10. A material group is adopted as a startable product.
It is divided into groups, and the delivery deadline is the highest in each product group.
From the start candidate list that selects products with a small margin,
Products to be cast in the melting furnace during the relevant time zone
A char that can dissolve the number of charges in the selected start list.
Casting planning apparatus according to claim 8 or 9, wherein the composed configured to select a product to so that to match the over-di number. 11. A material group is adopted as a startable product,
It is divided into groups, and the delivery deadline is the highest in each product group.
From the start candidate list that selects products with a small margin,
Products to be cast in the melting furnace during the relevant time zone
A char that can dissolve the number of charges in the selected start list.
If the product cannot be selected to match the number of charges, it is configured to select the product with the smallest number of charges or the product with the largest number of charges. The casting plan creation device according to claim 9 . 12. The method according to claim 12,Although the products that can be launched are in the material group,
It is divided into groups, and the delivery deadline is the highest in each product group.
A candidate list to start by selecting products with a small margin, Casting candidate list Casting in the melting time in the melting furnace
Equipped with a list of starts to select products that are considered
e, The above The products included in the start candidate listThe aboveTo the start list
Every time I was selectedThe aboveIt is the same as the product that can be launched.
Products in one material groupAnd the smallest delivery deadline
ProductsTosameIt is not configured to extract to the start candidate list.
Claims characterized in that8Or9The casting plan described
Equipment. 13. Delivery time when the number of charges for connection is the same.
Casting planning device according to claim 9, characterized in that formed by so that construction be adopted towards total margins are small. 14. The casting plan making apparatus according to claim 8, 9, 10, 11, 12, or 13, wherein the casting equipment is a precision casting equipment. 15. A casting facility having a required number of melting furnaces.
A computer is used to perform each step of creating a casting plan.
A casting plan creation program that can be executed, In each melting furnaceAbout eachClassification time zoneEveryNumber of charges that can be dissolved
And the procedure to calculate In each melting furnaceAbout the materials that can be launched in each time zone
Group according to groupsProcedure and In each melting furnaceAbout each product group for each time zone
the most among themProducts with a small deadlineFor each groupElection
Steps toAmong products selected for each time zone for each melting furnace
From the maximum of the delivery time as
And the procedure to select the few eachClassification time zoneEveryConnect the selected productsThe number of charges
Procedure to set the dissolution order so that it is the leastWhen, Create a casting plan for each time zone according to the melting sequence
Procedure, Casting on the day by combining the casting plans for each of the above time zones
A procedure for formulating a manufacturing plan, In order from the smallest number of charges connecting the casting plan of the day
Procedure for selecting the required number Casting characterized by comprising and
Planning program. 16. A casting facility having a required number of melting furnaces.
A computer is used to perform each step of creating a casting plan.
A casting plan creation program that can be executed, In each melting furnaceaboutEach time zoneEveryNumber of charges that can be dissolved
And the procedure to calculate In each melting furnaceAbout the materials that can be launched in each time zone
Group according to groupsProcedure and About each melting furnaceEach of the above product groups for each time zone
the most among themProducts with a small deadlineFor each groupElection
Steps to Products selected for each time zone for each melting furnace
From among those cast in the relevant time zoneConnected tea
The one with the smallest number ofThe procedure for selecting eachClassification time zoneEveryConnect the selected productsThe number of charges
Procedure to set the dissolution order so that it is the leastWhen, Create a casting plan for each time zone according to the melting sequence
Procedure, Casting on the day by combining the casting plans for each of the above time zones
A procedure for formulating a manufacturing plan, In order from the smallest number of charges connecting the casting plan of the day
Procedure for selecting the required number Casting characterized by comprising and
Planning program. 17. The number of charges that can be melted in each melting furnace is exceeded.
The procedure to calculate the number of charges that can be melted and melting can be performed for each melting furnace
The casting plan creation program according to claim 15 or 16, wherein a procedure for deleting the number of charges exceeding the number of active charges is added. 18. A product selected <br/> out products of the same material group as casting in the division time slot, paying
The casting plan creation program according to claim 15 or 16 , characterized in that a procedure for selecting a product having the smallest deadline is added. 19. One number Charge dissolvable number Charge
Claim 15 or 16 cast planning program, wherein the composed contains steps of selecting a product so that not Itasa. 20. One number Charge dissolvable number Charge
If the so that not Itasa can not select the product, cast planning according to claim 16, wherein the smallest product charge quantity or charge becomes contains steps of selecting the largest product program. 21. A computer-readable recording medium on which the casting plan creation program according to any one of claims 15 to 20 is stored.