JPH07182391A - Cad system for standard component data base - Google Patents

Abstract

PURPOSE:To constitute a data base so that shape data on standard components, drawing data, production data, and processing data can be deformed parametrically. CONSTITUTION:The CAD system, which is equipped with a modeling means 1 and a process feature adding means 2 for parametrically creating a three- dimensional solid model and a process feature and creates the standard components parametrically, is provided with a model drawing means which converts the three-dimensional solid model and process feature into drawing data to obtain a drawing, a production and process data adding means 4 which adds production data and process data as the attributes of the drawing data, and a numeric data/parameter converting means 5 which converts numeric data relating to numeric data indicated among the shape data, drawing data, production data, and process data into parameters and performs inverse conversion when numeric data corresponding to indicated parameters in the shape data are supplied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD (Computer Aided Design) system, and more particularly to a CAD system capable of storing standard parts in a database.

[0002]

2. Description of the Related Art A conventional CAD system has a function of parametrically creating a three-dimensional solid model (having dimension data of each part of the solid model as parameters and applying specific numerical values to each parameter to apply it). A system that has the function of creating a solid model with specific dimensions) and the function of adding machining features such as screw holes and grooves to the three-dimensional solid model, and a balloon that provides information on the parts that are necessary when producing a product. A system that has the function of generating drawing part information as needed, and a system that has the function of drawing a three-dimensional solid model into a drawing (two-dimensional) by hidden line processing. Known (for example, Japanese Patent Laid-Open No.
-352280, JP-A-4-253278, and JP-A-5-174106).

[0003]

By the way, the inventor of the present application can form a new database by making the shape data of the standard parts, the drawing data, the production data and the machining data into a database so that they can be parametrically transformed in the CAD system. It has been conceived that design man-hours can be reduced and design quality can be improved when designing molds and devices. However, in the drawing function by the above-mentioned hidden line processing, information such as comment characters of data cannot be automatically inserted when drawing a three-dimensional solid model, and in the above parametric modeling function, it is included in the part information. It was not possible to change the existing information or the text information in the drawing by the parameter. In the past, there has been no CAD system that organically integrates all of the above-mentioned functions, and it has been difficult to create a database of standard parts in the CAD system as described above.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a CAD system that advantageously solves the above problems, and a standard parts database CA of the present invention is provided.
As shown in the concept in FIG. 1, the D system includes modeling means 1 for parametrically creating a three-dimensional solid model, and machining feature adding means 2 for parametrically creating a machining feature and adding it to the three-dimensional solid model. In the CAD system capable of parametrically creating standard parts, model drawing means 3 for converting a three-dimensional solid model and a machining feature into drawing data and drawing the drawing data, and production data as attributes of the drawing data and Production that adds processing data
The machining data adding means 4 and the designated first numerical data in the shape data of the three-dimensional solid model and the machining feature are converted into the first parameter, and the shape data, the drawing data, the production data and the machining data are converted. Of the second numerical data related to the first numerical data in the data of No. 1 to the second parameter related to the first parameter, and the numerical value corresponding to the first parameter in the shape data. When the data is given, the first parameter in the shape data is converted into the given numerical data, and the data of the shape data, the drawing data, the production data, and the processing data related to the first parameter. Numerical data / parameter conversion for converting the second parameter in the numerical data into numerical data related to the given numerical data. It is characterized in that provided with means 5, a.

[0005]

In such a system, the numerical data / parameter conversion means 5 converts the designated first numerical data in the shape data of the three-dimensional solid model and the machining feature into the first parameter, and also the shape. In the data, the drawing data, the production data and the processing data, the second numerical data related to the first numerical data is converted into the second parameter related to the first parameter, and the standard is converted. Create a database of parts.

When using the data of standard parts in the database, the user of the system must
Types of dimensional solid models and machining features,
If the numerical data corresponding to the first parameter in the shape data is given, the numerical data / parameter conversion means 5 first converts the first parameter in the shape data into the given numerical data, and The second parameter in the data of the shape data, the drawing data, the production data and the processing data related to the first parameter is converted into the numerical data related to the given numerical data, and then the modeling means 1 And machining feature adding means 2 parametrically creates a three-dimensional solid model and machining features using the converted numerical data corresponding to the first parameter and the second parameter in the shape data, and then model drawing means Three
Converts the three-dimensional solid model and the machining feature into drawing data and creates the drawing, and then the production / machining data adding means 4 corresponds to the second parameter in the production data and the machining data as an attribute of the drawing data. The production data and the processing data using the numerical data related to the given numerical data are added.

Therefore, according to the system of the present invention, the shape data of the standard part, the drawing data, the production data, and the machining data can be made into a database so as to be parametrically transformed, and the three-dimensional solid model is made into a drawing. At this time, information such as comment characters of data can be automatically entered, and the information contained in the part information and the character information in the drawing can be changed by parameters, so new molds and equipment It is possible to reduce design man-hours and improve design quality when designing such as.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 2 is an explanatory diagram showing each function of one embodiment of the CAD system for standard parts database according to the present invention. Specifically, the CAD system of this embodiment includes a central processing unit similar to a normal CAD system. It is equipped with various input / output devices and various storage devices, and a central processing unit program creates a three-dimensional solid model parametrically as shown in FIG. A known modeling function corresponding to the modeling means 1 and the machining feature adding means 2 for parametrically creating a machining feature as described above and adding it to the solid model, and FIG.
2C, a known drawing function corresponding to the model drawing means 3 for converting a three-dimensional solid model and a machining feature into drawing data by, for example, hidden line processing and drawing the drawing data. As shown in d), it has a known data adding function corresponding to the production / processing data adding means 4 for adding production data and processing data as attributes of drawing data such as balloons.

The CAD system of this embodiment further has a numerical data / parameter conversion function corresponding to the numerical data / parameter conversion means 5 also by the program of the central processing unit. The numerical data / parameter conversion function converts the designated first numerical data in the shape data of the three-dimensional solid model and the machining feature into the first parameter, and at least one of the production data and the machining data. The second numerical data related to the first numerical data in the first numerical data
When a parameter registration function for converting into a second parameter related to the parameter and numerical data corresponding to the first parameter in the shape data are given, the first parameter in the shape data is given to the given parameter. And a standard part output function for converting the second parameter in the production data and the processing data related to the first parameter into the numerical data related to the given numerical data. This will be further described below.

FIG. 3 is a flow chart showing a processing procedure for performing the parameter registration function, and FIG.
It is explanatory drawing which shows the processing content, and the step number which performs the process is attached to the position in FIG. 4 corresponding to the process in FIG. Before performing this processing, a three-dimensional solid model as shown in the internal file portion in FIG. 4 and processing features such as hook screw holes and holders added to the three-dimensional solid model are provided in advance as required. The shape data of the standard parts, the drawing data, the production data, and the processing data concerning the standard parts are created by using the specific numerical values, and the storage capacity of the storage device is relatively small, but the data from the central processing unit is used. The internal file of the internal file that is accessed quickly and the external file that is relatively slow but has a large storage capacity is registered in the internal file, and the created standard part shape is displayed on the screen of the output device such as the CRT of the system. To display.

As the production data, for example, name, material, R side quantity, L side quantity, weight, parent part symbol,
You can create symbols for relative parts, flags for installation / removal, flags for remarks, character types for remarks, number of characters for remarks, character strings for remarks, R / L classification, shipping classification, change information, abbreviations, etc. As the machining data, for example, regarding the machining of a hole, a hole type, a machining identification symbol, a machining procedure-1, a machining procedure-2, a hole name, the number of stages of the hole m, a diameter of the nth stage of the hole m, and a hole depth. The hole diameter accuracy, the number of hole center points, the center point coordinates of the hole n, the through hole flag, the whirl-stop flag, etc. can be created.

Then, in step S1 in FIG. 3, the user designates (inputs) a registration data name for parameterizing the standard part created as described above and registering the standard part in the external file. In step S2, the user specifies, for example, the input parameters L, H, and W in FIG. 4 by the dimension data 200, 125, and 100, respectively. Because of the first numerical data),
Each input parameter (first parameter) is specified and specified by the dimension data. This input parameter is a parameter for the user to input specific numerical data when using the standard part later, and by classifying the input parameter after the suffix, for example, the distance from the origin is used as a parameter. Or, the distribution dimension centering on the origin is used as a parameter,
It can be specified in various ways.

In the next step S3, the user inputs a comment on input parameters such as head length, tap length, diameter, etc. and, for example, dimensions at the time of creating data of the standard part, as required. The initial value of the parameter and the dimension data of the other part in the shape data which can be arbitrarily defined, but which is desired to be parameterized in association with the dimension specified in the input parameter, such as the parameter L / 2 in FIG. Numerical data in data and processed data (second
(Numerical data of), a parameter calculation formula that is arbitrarily set so as to have a constant relationship with the input parameter, a constant value that represents the coordinates of a point or area that should not be changed by the parameter, and the like are specified. Then, the user specifies a reference point, for example, as shown in FIG.

Then, in the next step S5, the system
For example, the position data of the left end point related to the input parameters L, H, and W in FIG. 4, the additional dimension for the dimension designated in the input parameter, the center position of the R portion for the radius dimension of the R portion designated in the input parameter, etc. Related to the dimensions specified in the input parameters, such as the shape data of each part, the dimension data of each part of the standard part in the drawing data, the quantity data of the accessories in the production data, and the dimension data of the machining feature in the machining data. Automatically retrieve each data to be parameterized (also the second numerical data), and in the next step S6, the system designates the dimensional data designated to be converted to the input parameter and the designated parameter. Dimension data in the shape data and numerical data in the above production data and processing data obtained by the calculation formula, and the dimensions specified in the input parameters Related to be parameterized, each data of the size data and the production data or numerical data in the processed data in the shape data, respectively replace the parameter.

In the next step S7, the system temporarily registers the designated input parameter (first parameter) in the internal file, and in the following step S8, the system
Various other replaced parameters (second parameters) other than the above input parameters, the specified arbitrary parameter calculation formula, and the input parameters and parameters such as the additional dimension and the center position of the R portion that are uniquely determined. Parameter calculation formula showing the relationship with (other parameters =
(Including the case where it becomes an input parameter) is temporarily registered in the internal file, and in the next step S9, the system temporarily registers in the internal file the area designation parameter in which the above-mentioned constant value is combined with the input parameter. Then, in the final step S10, the system outputs each data registered in the internal file in steps S7 to S9 to an external file and stores it therein. Thus, here, a database of standard parts in which the required data that the user wants to change as appropriate is parameterized is created.

When the user uses the standard part data in the database, the standard part output function of the numerical data / parameter conversion function may be used, and FIG. 5 performs the standard part output function. FIG. 6 is a flow chart showing the processing procedure at that time, and FIG. 6 is an explanatory diagram showing the processing contents. In FIG. 6, the position corresponding to the processing in FIG. is there.

That is, in step S11, the user
The registered data name of the standard part to be used is specified in the system, and in the next step S11, the user specifies the specific numerical value of each input parameter in the system. This allows
In the next step S13, the system reads the data of the standard part corresponding to the registered data name from the external file, and stores the data of the shape data, the drawing data, the production data, and the machining data related to the input parameters. Specific numerical values of the other parameters are calculated and determined by the above calculation formulas, respectively, and in the next step S14, the system
The input parameters in the shape data were replaced with the specified numerical data, and other parameters in the data of the shape data, the drawing data, the production data and the processing data related to the input parameters were determined by the above calculation. Replace with a specific value.

In the next step S15, the system performs a required coordinate transformation on the shape data and the like by the arrangement matrix, and in the following step S16, the system changes the data based on the area designation parameter. In step S17, the system automatically checks the data to see if there is any problem between the data, for example, the solid model is too thin or the straight line is a point. In case of error, an error message is displayed to prompt correction of input parameters. Then, in the final step S18, the system saves the shape data, the drawing data, the production data, and the processing data, which are obtained by converting each parameter into specific numerical values as described above, in an internal file so that any data can be used immediately. To

Therefore, according to the system of this embodiment,
Shape data of standard parts, drawing data, production data and machining data can be made into a database so that it can be transformed parametrically, and information such as comment characters of data can be automatically created when drawing a three-dimensional solid model. Since it is possible to insert it and change the information contained in the part information and the character information in the drawing by parameters, it is possible to reduce the design man-hours when designing a new mold or device. At the same time, the design quality can be improved.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-mentioned example. For example, if the storage capacity of the internal file is sufficiently large, all processing may be performed using the internal file.

[0021]

As described above, according to the CAD system of the present invention, the shape data of the standard part, the drawing data, the production data, and the machining data can be made into a database so as to be parametrically transformed, and the three-dimensional solid model can be drawn. Information such as comment characters of data can be automatically entered when converting, and the information included in the part information and the character information in the drawing can also be changed by parameters, so a new mold It is possible to reduce design man-hours and improve design quality when designing a device, a device, or the like.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an outline of a configuration of a CAD system for standard parts database according to the present invention.

FIG. 2 is an explanatory diagram showing each function of an embodiment of a CAD system for standard parts database of the present invention.

FIG. 3 is a flowchart showing a processing procedure when performing a parameter registration function of the CAD system of the above embodiment.

FIG. 4 is an explanatory diagram showing processing contents when performing the parameter registration function.

FIG. 5 is a flowchart showing a processing procedure for performing a standard part output function of the CAD system of the above embodiment.

FIG. 6 is an explanatory diagram showing the processing contents when performing the standard component output function.

[Explanation of symbols]

 1 Modeling Means 2 Machining Feature Adding Means 3 Model Drawing Means 4 Production / Machining Data Adding Means 5 Numerical Data / Parameter Converting Means

Claims (1)

[Claims] 1. A modeling means (1) for parametrically creating a three-dimensional solid model, and a machining feature adding means (2) for parametrically creating a machining feature and adding it to the three-dimensional solid model,
CA that enables parametric creation of standard parts
In the D system, a model drawing means (3) for converting a three-dimensional solid model and a machining feature into drawing data and drawing the drawing data, and a production / machining data adding means for adding production data and machining data as attributes of the drawing data ( 4), and converting the designated first numerical data in the shape data of the three-dimensional solid model and the machining feature into the first parameter, and in the data of the shape data, the drawing data, the production data and the machining data. Converting the second numerical data related to the first numerical data into a second parameter related to the first parameter to obtain numerical data corresponding to the first parameter in the shape data. Then, the first parameter in the shape data is converted into the given numerical data and Numerical data / parameter conversion means for converting the second parameter in the shape data, the drawing data, the production data, and the processing data related to the parameter to the numerical data related to the given numerical data ( 5) and C are provided for standard parts database C
AD system.