JPS63138466A - Control method for form data on cad system - Google Patents

Abstract

PURPOSE:To realise design of a product which has a large quantity of form data compared with the memory capacity applicable on a central processing unit CPU, by adding the form evolving information into a parts control table to decide whether the form data on the relevant parts should be evolved on the CPU or not and controlling the graphic data based on said form evolving information. CONSTITUTION:When the data stored in a memory is read out to a CPU104 and utilized for design, the form data 102 on the parts needed for designing jobs is selected and red out. The CPU104 performs its control by adding the form evolving information 106 showing presence or absence of the data 102 to the data which shows the parts constitution of each parts. Thus it is possible to design such a product that has the data 102 requiring the memory capacity larger than that available with the CPU104.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for managing shape data in a computer-based design support system (hereinafter referred to as a CAD system), and particularly relates to a method for managing shape data in a computer-based design support system (hereinafter referred to as a CAD system), and in particular to a method for managing shape data in a computer-based design support system (hereinafter referred to as a CAD system). The present invention relates to a shape data management method suitable for realizing the design of a product having a large amount of shape data compared to the amount of shape data.

[Conventional technology]

In conventional CAD systems, for example,
As described in No. 468, by having shape data directly in the information that defines one drawing, or by having information that specifies the shapes that the drawing requires, it is now possible to extract all the necessary shapes. There is. However, when a large amount of shape data representing a product becomes available, no consideration has been given to allowing users of the CAD system to select and use only the shapes needed for each design work.

[Problem that the invention seeks to solve]

CAD CAD system products are becoming increasingly complex, with a large number of component parts and an enormous amount of shape data. However, with the conventional technology, it is not possible to handle the entire diagram of a product having this large amount of shape data within the limited amount of memory on the central processing unit. To solve this problem, it would be possible to significantly increase the amount of memory, but in that case, shape data that is not needed during design work will also be retrieved and displayed on the screen, making one screen complicated and reducing responsiveness and operability. .

The purpose of the present invention is to enable the design of products that have a large amount of shape data compared to the amount of memory available on the central processing unit, and to provide operability that allows only the shape data of the necessary part to be retrieved during design work. The object of the present invention is to provide a good method for managing shape data for a CAD system.

[Means for solving the problem] The above object is achieved by adopting the following means.

i. Shape development information indicating whether or not the shape data of that part is to be developed on the central processing unit is provided in the parts management table defined corresponding to each part forming the 6 products, and this information is also used. Manage shape data.

2. Provide information specifying which part from which the shape is to be extracted from the tree-structured parts configuration as a parameter file. Furthermore, the shape development information of the parts management table developed on the central processing unit is examined, and parameter data is created and registered in the parameter file so that it can be reused.

3. Provide figure type information in the figure management table associated with the parts management table, and add the figure type information of the unfolded figure to the shape development information in the parts management table.

[For production]

When manipulating the shape of a part, the figure belonging to the part is retrieved from the pointer to the figure management table in the parts management table corresponding to that part.The figure management table contains a pointer to the next figure management table. Therefore, by sequentially operating this pointer, you can extract all the shapes belonging to the part. 0 Shape development information provided in the parts management table 1 Before checking the pointer to the shape management table, check this By referring to it, it is possible to judge whether or not it has a shape to be processed. This allows only a part of the shape of the part to be developed on the central processing unit.

The parameter file is referred to when reading the shape data of a component from an external memory, and the shape data is developed on the central processing unit only for the component specified by the parameter. This makes it possible to develop the shape of any part without individually specifying the parts whose shape data is to be developed. It is also easy to reproduce the same situation.

【Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram explaining the basic data structure in the present invention.

In FIG. 1(a), a component shape file 101 stores the shape data of each component, and can be input/output using the tank of one component as a key. Reference numeral 102 denotes shape data of a component stored in a component shape file, and this shape data includes a plurality of graphic data of a plurality of types. 10
3 is a parameter file, and part shape file 10
Parameter data specifying the parts whose shape data should be read from 1 is stored. 104 is a central processing unit, and N indicates shape data developed on the central processing unit.

FIG. 1(b) shows the relationship between the parts management table and figure management table created for each part in the parts configuration on the central processing bag R104.One part management table 105 contains shape development information. 106, and based on the shape development information 106, whether or not the part has developed its shape;
If it is expanded, you can see what type of shape is being expanded.

Reference numeral 107 is a pointer for associating figures belonging to the same part, and the pointer 107 is used to link figures in each figure management table 1.
The 0 figure management table 108 to which 08 is pointed holds figure type information 109 indicating the type of each figure. This figure type information 109 not only always represents the shape of one part in a detailed shape, but also can represent it in a simple shape as needed, such as an external shape or a simplified symbolic figure. show.

Figure 2 shows the relationship between part configuration examples and their parts management tables. ) is a relationship diagram of each component management table. In FIG. 2(b), 201 is a component management table corresponding to each component, and corresponds to 105 in FIG. 1(b). 202 is a tank and is a unique name of a part. 203 is a pointer to the parts management table corresponding to the assembled part, and 204 is a pointer to the parts management table corresponding to the child part.

Reference numeral 205 is a pointer to a component management table corresponding to a parallel component that has the component II4 in common.

FIG. 3 shows the contents of members stored in the parameter file 103, with 301 indicating one member. One member includes a plurality of parameters 302 equal to the number of parts whose shape is developed on the central processing unit.

When reading data from an external memory in order to perform design work on a certain product, the product's tank and the member name of the member in the parameter file 103 are specified. The shape data of the part is read out from the part shape file 101 according to the contents of this parameter, and a shape type can be defined for each shape of the component developed on the central processing bag [104]. , it becomes possible to express the shape of parts as needed. FIG. 1(a) shows this situation, and the part shape file 101
The shape data is developed on the central processing unit 104 from the shape data 102 of each part in the file according to the contents of the specified member of the parameter file 103. The parameter specifies which part out of all the components requires which figure type of figure data.
Only the shape of the part necessary for design work can be extracted.

FIG. 1(b) shows a management method for shape data developed on the central processing unit 104.

In other words, parts management table 1 created for each part.
05 includes shape development information 106, and a pointer 107 connects the figure management tables 108 belonging to each part. Each figure management table 108 has figure type information 109, which makes it possible to control whether or not to expand the shape data of each part and to manipulate the shape of a specific figure type.

FIG. 2(b) shows how the parts management table expresses the parts configuration of the product. In other words, the one part management table 201 is created for each part, and the pointer 203 for the assembled part and .

By having a pointer 204 for child parts and a pointer 205 for parallel parts, the parent-child relationships of all parts can be completely expressed. For example, if you want to check the child parts under the rubel of a certain part.

All the child parts can be recognized by sequentially following the pointer 204 to the child part and the pointer 205 to the parallel parts in the part management table of the child part.

The contents of the parameter data registered in the parameter file 103 as shown in FIG. 3 can be created using a normal editor, but it can be created when designing work using a CAD system.

At that point, the program examines the shape development information of each part, creates parameter data, and stores it in the parameter file 103'! J, ts can be done. The parameters, as shown at 301, include a section of the assembled part, a section of child parts, a sequence number, and shape development information. The sequence number is a number for identifying child parts when a plurality of the same parts are related as child parts of the same assembled part.

By referring to this parameter, it is possible to recognize which figure type shape data should be extracted for which part in the entire part configuration.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the following effects can be obtained.

(1) Design efficiency can be improved because it is possible to perform design work using a CAD system even for products having shape data that require a larger amount of memory than the amount of memory available in the central processing unit.

(2) When dealing with the overall diagram of a product, it is possible to erase the shapes of parts that are unnecessary at that time or to represent them with simplified shapes, so the designer can easily see the shapes of only the necessary parts. Can be operated on screen.

(3) Since the amount of shape data on the central processing unit and the amount of shape data displayed on the display screen can be reduced, processing time for operations on a part-by-part basis such as movement and rotation can be reduced, and command responsiveness can be improved.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining the basic data structure in the present invention, Fig. 2 is a diagram showing the relationship between a part configuration example and its parts management table, and Fig. 3 is a diagram explaining the contents of data in the parameter file. . 101... Part shape file, 102... Part shape data, 103... Parameter file, 1
04...Central processing unit, 105...Parts management table, 106...Shape expansion information, 107...Pointer to figure management table, 108...Figure management table, 109...Figure type information , 201...
Parts management table, 202... Department tank, 203...
Pointer to the parts management table of the parent part, 204...
・Pointer to the parts management table of child parts, 205
... Pointer to the parts management table of parallel parts, 301 ... A member in the parameter file, 302.
...Contents of the parameter.

Claims (2)

[Claims] (1) In a computer-based design support system (hereinafter referred to as a CAD system) that stores data representing the component configuration of a product to be designed and shape data on an external memory, the data on the memory is transferred to a central processing unit. When reading out the shape data and using it for design, the shape data of the parts required during design work is selected and read out, and the central processing unit stores information indicating whether or not it has shape data for each part. A shape data management method for a CAD system, characterized in that the shape data management method for a CAD system is managed by adding the component configuration to data representing the component configuration. (2) In order to select and read only the shape data of the parts required during the design work, prepare a file in which the part numbers of the parts to be selected are written as parameter data,
C according to claim 1, characterized in that the shape data of the required part is selected by specifying the relevant member in the parameter file at the time of reading.
AD system shape data management method.