JPH04361304A - Cast product manufacture system - Google Patents

Abstract

PURPOSE:To optimumly decide the division of a casting pattern regardless of the technical level of an operator (worker) to operate the cast product manufacture system in the case of manufacturing the pattern used for casting a press metal die or the like according to a full mold method. CONSTITUTION:When deciding the shape of the cast pattern based on shape data to be inputted, a dividing condition data base is stored in a large capacity storage device 4 according to material data 4b, tool data 4c and working data 4d inputted from a keyboard 12 or the like. While referring to this dividing condition data base, the shape of the casting pattern is divided corresponding to the shape data, plural dividing plans are decided and plural divided shape plans are successively displayed on a graphic display device 8. Next, NC data are generated from the shape data related to the desired divided shape plan, and these NC data are supplied to an M/C controller 19. According to the NC data, the controller 19 grinds foam resin and prepares the casting pattern.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting manufacturing system for manufacturing a model used when casting a press mold or the like by a full molding method.

0002

[Prior Art] Conventionally, when casting a press mold, the press mold is formed from a foamed resin, this model is embedded in casting sand, and the mold is poured as it is, and the molten metal is used to mold the model formed from the foamed resin. A well-known full-molding method is to burn, gasify, and dissipate the molten metal, and then solidify the molten metal in a cavity that is later formed to obtain a press die casting.

[0003] The present applicant also has published Japanese Patent Application Laid-open No. 2-2063.
Discloses a method for manufacturing a cast model as described in Publication No. 7. In other words, in the casting model manufacturing method disclosed in the same publication, when designing the casting model, the product shape of the press mold is input into the CAD system from existing product shape data, and based on this data, the shape of the bottom surface of the press machine body is determined. Draw the
This is a method in which the rib shape is drawn from the optimal position, the position of cushion pins etc. are taken into account, and the cast model is divided into multiple parts, taking into account the possibility of machining such as undercut (pocket machining) using a machining jig. be.

0004

However, the method for producing a cast model described above has the disadvantage that the work of dividing the model is greatly influenced by the experience of the operator of the production system.

For example, if the operator does not have a certain level of casting technology, he or she may consider post-processes such as machining and assembly, and minimize the work time and effort in those processes to find the optimal solution. This creates a problem in which it is practically difficult to determine the division of the cast model. Therefore, variations in the number of man-hours and variations in the dividing plane occur depending on the technical level of the operator, which affects the shape quality of the product.

[0006] Therefore, the present invention provides a system for producing cast products regardless of the technical level of the operator (worker) operating the casting product manufacturing system.
It is an object of the present invention to provide a casting product manufacturing system that can optimally determine the division of a casting model and generate NC data based on the division shape.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a casting product manufacturing system that determines the shape of a casting model related to a casting product using a CAD system based on shape data. an input means for inputting a division condition database consisting of material data, tool data relating to tools for processing the casting model, and processing data of the casting model; a division shape plan creating means for creating a plurality of division shape plans, and a display means for sequentially displaying the plurality of division shape plans on a display means;
It is characterized by having the following.

[0008]

[Operation] In the casting product manufacturing system according to the present invention, when determining the casting model shape by the CA system based on the input shape data, the material data, tool data,
Input the processing data and construct the division condition database. Then, referring to this division condition database, the casting model shape is divided into division shapes according to the shape data, a plurality of division shape proposals are created, and these are sequentially displayed on the display means to appropriately select the optimal division method. do. Therefore, the optimal divided shape of the casting model can be determined regardless of the technical level of the operator (worker) operating the casting manufacturing system. Further, NC data can be generated from this divided shape plan, and a casting model can be created using the generated NC data.

[0009]

[Example] Regarding the casting product manufacturing system according to the present invention,
Preferred embodiments will be described in detail below with reference to the accompanying drawings.

The casting product manufacturing system according to this embodiment has the same functions as a computer-aided automatic design system generally called a CAD system, and as shown in FIG. A computer 2 that plays the role of calculation, display control, and database management; a large-capacity storage device 4 that can store and update a large amount of graphic information; and a computer that stores NC data created from casting model data generated by the system. A storage device 5 for storing data, a graphic display device 8 which is a central device for interaction with the system and is used in conjunction with an input device, a graphic output device 6 such as an XY plotter, and a tablet 10 connected to the graphic display device 8. , a keyboard 12, a mouse 14, a light pen 16, and other devices. Note that it is possible to connect to this system, for example, another system 17 for creating the NC data as necessary.

The large-capacity storage device 4 stores CAD data 4a created by a macro module to be described later based on input product shape data, and materials related to foamed resin such as foam size inputted by a means such as a keyboard 12. Data 4b, tool data 4c such as tool size inputted by means such as the keyboard 12, machining data 4d indicating the presence or absence of machining such as undercut machining, etc. are stored.

[0012] The casting product manufacturing system is shown in FIG.
It has many program modules as shown below. Each program can be classified into the following modules depending on the functions it shares. (a) An operating system 32 and control module 34 that controls processing and information flow within the foundry manufacturing system (CAD system). (b) An input module 44 that assists input operations compatible with various input devices, such as the keyboard 12, to be performed smoothly. (c) an input interpretation module 40 that interprets input information according to the format of command instructions; (d) A display module 38 that manages display information and performs display processing according to commands. (e) A command module 24 that performs graphical processing according to commands, which is composed of submodules corresponding to commands. (f) A large amount of information held in the database 54 (
A database operation module 50 that efficiently searches, reads, and accumulates a large amount of information necessary for a casting manufacturing system. (g) A macro module 28 that executes a macro program 26 that is an automatic design program. (h) An external system interface 30 that performs information exchange and interlocking processing with other CAD systems. (i) An NC data conversion module 33 that creates NC data 31 from the shape data of the casting model.

In order to maintain expandability and maintainability, the casting manufacturing system also includes a system control file 22 that stores the system configuration and standard values, and a command control file that stores the operability of each command and program control procedures. Auxiliary files such as a file 42 and a display control file 36 that stores the model and configuration of the display device are prepared.

Additionally, as other auxiliary equipment, there is a graphic processing library 46 for processing graphics, and a display library 48 for displaying on the graphic display device 8.
, a diagram output utility 56 for outputting processing results to the graphic output device 6, a data exchange utility 52 for coupling with other CAD systems, and the like are provided.

Next, each module will be briefly explained. The control module 34 modularizes the program group and intervenes between each module to centrally manage control within the system and standardize calling procedures. Its functions include functions to perform start, end, abnormal processing, execution control of each module, recording of execution history, debugging function, special processing with the operating system 32, and the like.

The input module 44 provides the user with a comfortable input procedure in accordance with specifications that organize and unify various input methods of various input devices. Its functions include prompting the user to instruct the user on the type of information to be input, the input method and input device, selecting the input device, and converting the input information into a standard format.

The input interpretation module 40 supports various input instruction methods by unifying the input information interpretation method and result display, improves input operability, and maintains system expandability. Its functions include interpreting input information and displaying the interpretation results.

The display module 38 uniformly processes various display operation requests and manages display information and display states. Its functions include display device management, display control,
It has functions for managing display information and display status.

The command module 24 has the function of centrally managing input argument formats, calling processing programs according to commands, and processing results, thereby maintaining maintainability and expandability of the system.

The database operation module 50 standardizes the method of requests from other modules, and also provides means for recovering from the occurrence of a failure. Its functions include managing database usage, operating the database 54, and processing when a failure occurs.

The external system interface 30 standardizes the exchange of information with other systems and makes effective use of the system, and its functions include the function of exchanging information with external systems and controlling the operation of external programs. .

The macro module 28 controls the execution of the system according to the created macro program 26, and its functions include interpretation of the macro program 26,
It has a function of executing a macro program 26.

The cast product manufacturing system according to this embodiment is basically constructed as described above, and its operation will be explained next.

First, according to the instructions from the input module 44, the product shape data of the press mold to be manufactured is inputted from input means such as the keyboard 12, and a command instructing CAD processing is inputted, and then the processing program is executed by the command module 24. The called and input shape data is processed by the input interpretation module 40 and the macro module 28, and CAD data is created.

This CAD data is stored as CAD data 4a in the mass storage device 4 by the database operation module 50, and is also stored in the display module 3.
8 and a graphic display device 8
The product shape can be checked.

Next, as data regarding the foamed resin that will be the material for the press mold model, data such as the foam size is inputted from an input device such as the keyboard 12. This data is processed by the input interpretation module 40 and the database operation module 50, and stored in the mass storage device 4 as material data 4b.

Similarly, data such as tool size can be entered on the keyboard 1 as data regarding tools to be used in subsequent processes.
Input from a second-class input device. This data is processed by an input interpretation module 40, a database operation module 50, and stored in the mass storage device 4 as tool data 4c.
is stored as .

Furthermore, data regarding the status of processing to be performed in a subsequent step, such as the presence or absence of undercuts, is input from an input device such as the keyboard 12. This data is processed by the input interpretation module 40 and the database operation module 50, and stored in the mass storage device 4 as processed data 4d.

Next, when a command instructing division processing of the product shape is input, the CAD data 4a is read out from the mass storage device 4, and this CAD data 4a is
Material data 4b and tool data 4c constructed in relation to
, the division condition database of the processing data 4d is read out, the division conditions are referred to, and the shape of the casting model is divided.

This proposed division shape is displayed on the graphic display device 8 under processing by the display module 38, so that the division shape can be determined. In this case, the casting product manufacturing system calculates a plurality of possible division shape proposals by referring to the division conditions, and if the displayed division shape proposal is not appropriate, it calculates the next division shape proposal. Input instructions to display.

[0031] Thereby, the plurality of division shape proposals are displayed one after another on the display means, and the operator (operator) operating the casting product manufacturing system can appropriately select the optimum division method.

FIGS. 3 to 6 are diagrams showing the proposed divided shapes obtained as described above. In Fig. 3, the shape of the casting model is divided into 1 to 12 parts marked with a circle in the figure, and in Fig. 4, the shape of the casting model is divided into parts marked with a circle in the figure. It is divided into parts 1 to 6, shown below.

[0033] In these divided shape plans, the number of divisions is too large and the number of constituent parts is large, so the number of processing steps in the post-process increases, assembly is troublesome, and there is a risk of incorrect assembly. , there are many problems such as problems with assembly accuracy, and it is difficult to say that it is an optimal split shape plan.

On the other hand, in FIG. 5, the shape of the casting model is divided into parts 1 to 3 indicated by circles in the figure, and in FIG. 6, the shape of the casting model is , it is divided into 1 to 3 parts indicated by circles in the figure.

In these divided shape plans, the problem of the number of divisions has been resolved, and considering the processing conditions of post-processes such as undercutting, the divided shape plans shown in FIG. 5 or 6 are considered to be appropriate.

[0036] Further, considering the averaging of machining in the subsequent process based on the tool data 4c such as tool size, and considering the ease of assembly, the division plan shown in Fig. 6 is superior, and in the end, the division plan shown in Fig. It is only necessary to determine the division shape plan No. 6 as the optimal division shape proposal.

Therefore, for example, after the operator selects the division plan shown in FIG. 6, the system creates NC data 31 from the shape data related to this division plan. in this case,
The shape data is converted into NC data 31 by the NC data conversion module 33 and stored in the storage device 5. Note that the NC data 31 can also be created on another system 17. Next, the created NC data 31 is transferred to M via a recording medium such as a flexible disk, magnetic tape, cassette tape, paper tape, or IC card.
/C controller 19.

On the other hand, the M/C controller 19
Machining center (M/C) 21 based on C data 31
to create a casting model corresponding to the desired division plan. FIG. 7 shows three foamed resins 60 corresponding to the division plan in FIG.
This figure shows the case where portions a to 60c, excluding the hatched portions, are ground using a tool 62 having a tool diameter d and a tool length m in accordance with the NC data 31. A casting mold is created based on the casting model created in this way.

[0039]

[Effects of the Invention] According to the cast product manufacturing system according to the present invention, the following effects can be obtained.

That is, when determining the shape of a cast model using the CAD system based on the input shape data, material data, tool data, and machining data are input, a division condition database is constructed, and this division Referring to the condition database, divides the casting model shape according to the shape data, determines a plurality of division plans, and then sequentially displays the plurality of division shape plans on a display means and appropriately selects the optimal division method. Therefore, regardless of the technical level of the operator (worker) operating the casting manufacturing system,
The division of the casting model can be optimally determined. Then, it becomes possible to generate NC data based on the shape data related to this division plan and create a desired casting model.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of a casting product manufacturing system of the present invention.

FIG. 2 is a diagram showing the program configuration of the casting product manufacturing system of the present invention.

FIG. 3 is a diagram showing an example of a divided shape of a casting model.

FIG. 4 is a diagram showing another example of the divided shape of the casting model.

FIG. 5 is a diagram showing another example of the divided shape of the casting model.

FIG. 6 is a diagram showing another example of the divided shape of the casting model.

FIG. 7 is an explanatory diagram of grinding foamed resin according to the division plan to create a casting model.

[Explanation of symbols]

2...Computer 4...Mass storage device 4a...CAD data 4b...Material data 4c...Tool data 4d...Processing data 5...Storage device 8...Graphic display device 10...Tablet 12...Keyboard 14...Mouse 16...Light pen 31...NC data

Claims (2)

[Claims] 1. A casting product manufacturing system that determines the shape of a casting model of a casting product using a CAD system based on shape data, comprising: material data of the casting model, tool data of a tool for processing the casting model, and a casting model. an input means for inputting a division condition database consisting of processing data; and a division shape plan creation means for referencing the division condition database, dividing the casting model shape according to the shape data, and creating a plurality of division shape plans. and display means for sequentially displaying the plurality of divided shape plans on a display means. 2. The casting product manufacturing system according to claim 1, further comprising NC data generation means for generating NC data based on the divided shape plan.