JPH11203331A - Cad data management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively execute drawing edition and manufacturing data preparation work by extracting contents for comparison between data before and after revision of a revised product to be designed through the use of a function of three-dimensional CAD software and providing two-dimensional CAD software with a function to automatically generate the contents for comparison as a sentence to explain the contents of the revision on a two-dimensional drawing. SOLUTION: When changes (a), (b) in shapes are instructed by an interactive operation of a three-dimensional CAD software from an input device, a processing is performed, the contents of geometrically shaped data 10 are changed for component data 8 to be included in a three-dimensional (a) stored in a primary storage device and a processing result is displayed on a display by a central processing unit. In this case, a fact that the geometrically shaped data is changed is detected by the function with which the three-dimensional CAD software is provided and a detection result is stored in a correction content table (d) of the primary storage device. In addition, the contents of correction is replaced with a note on the two-dimensional drawing to explain the contents of the revision.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to three-dimensional CAD software and two-dimensional CAD for use in designing mechanical structures.
The present invention relates to a device for managing data generated by AD software.

[0002]

2. Description of the Related Art In the field of designing mechanical structures,
A two-dimensional C that efficiently creates drawings by substituting the work of writing drawings by hand on paper from a traditional computer operation
AD software has been used, but with the development of information processing technology in recent years, it has become possible to process large-scale geometric processing with constraints, and a three-dimensional depth that can more visually represent the shape of products 3D CAD software capable of defining geometric figures having a pattern has been developed and has entered a period of popularization. Three-dimensional CAD software capable of three-dimensionally expressing the geometric shape of a product is widely used to create NC data to be input to an NC machine tool that automatically processes mechanical parts by numerical control. 2D CAD software that simulates drawing characters and pictures on paper to create drawings is still widely used to convey assembly procedures to be assembled and details of corrections to drawings from design workers to manufacturing workers by text and pictures. Have been. Design the same product for this,
3D CAD software and 2D CA for manufacturing
It is necessary to use the D software together, and the time and effort of data creation are doubled.

FIG. 5 is a conceptual diagram for explaining a device for managing data generated by CAD software. Reference numeral 30 denotes an input device such as a keyboard or a mouse, and 31 denotes an operation device which receives an instruction from the input device 30 and performs an operation process. A central processing unit for performing the processing, 32 is a main storage device for temporarily storing the contents of the processing, 33 is a display device for displaying the processing result, and 34 is a magnetic disk for storing the processing result. Such a primary storage device 35 is a secondary storage device typified by a magnetic tape for maintaining data permanently. 2D CAD software and 3D C
Both the AD software inputs geometric shape data and the like of the product to be designed from the input device 30, performs arithmetic processing in the central processing unit 31, and holds the data being processed in the main storage device 32, The drawing and the three-dimensional model are displayed on the display device 33, and data corresponding to the design result is stored in the primary storage device 34 or the secondary storage device 35.

FIG. 6 shows the processing contents of three-dimensional CAD software and two-dimensional CAD software when the contents of a product to be designed are corrected in the course of designing a mechanical structure. The three-dimensional CAD software has a function of comparing and displaying the geometric shapes before and after the revision on the display device 33. FIG. 6 (a) is before the revision and FIG. 6 (b) is after the revision. Yes, the two revised points, the chamfer dimension and the radius of the rotating body, can be confirmed by comparing and displaying the geometric shapes before and after the revision. Is described, the contents of the drawings become complicated and difficult to read. Therefore, the projecting directions 36 and 37 are entered by operating the input device 30 using the function of the three-dimensional CAD software. And the central processing unit 31 performs the function of a projection view of the creation function 38 and 39, to create a drawing as planar projection view viewed from the projection direction 36 or 37 (Figure 6 (c)).

In this case, a two-dimensional drawing data diagram (e) expressing a drawing in a plurality of types of data such as reference model data 41, view data 42, layer data 43, and annotation data 44 is stored in a primary storage device 34. FIG. 6 (c) showing a two-dimensional drawing data which is stored using the projection view creation functions 38 and 39 of the central processing unit 31 is shown in FIG. 6 (c). In the reference model data 41, information as to which three-dimensional model is referred to is stored in the view data 42, and information as to which position on the drawing is projected from which projection direction is stored in the display device 33. To be displayed.

Further, after making FIG. 6 (c) showing a drawing after the revision, a document in which the content of the revision is described in characters is input from the input device 30, and the central processing unit 31 stores the two-dimensional data in the primary storage device 34. Drawing data The annotation data 44 in FIG. 6 (e) is updated, and the result is displayed in the drawing as shown in FIG. 6 (d) to indicate the contents of the revision and to indicate the corrected position. Similarly, a symbol called a revision symbol is input from the input device 30, and the central processing unit 31 sends the symbol to the primary storage device 34.
Is stored in the annotation data 44 of FIG. 6 (e), and the result is displayed on the display as 40.

[0007]

In the three-dimensional CAD software, the revision points of the product contents are visually grasped, and how each revision point affects the overall shape of the product to be designed and is easy to grasp, and the two-dimensional CAD software is easy to understand. In the CAD software, since the revised points are described in all the characters, each of the three-dimensional CAD software and the two-dimensional CAD software has an advantage that the revised points can be confirmed one by one without missing and left as evidence. However, this 3D CAD software and 2D CA
In order to make use of the advantages of both D software, it is necessary to create data for both of them, so that the time and effort of data creation are doubled.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. When a product to be designed is revised, a revision point automatically detected by three-dimensional CAD software is defined as two points.
An object of the present invention is to provide a data management device that can automatically create a description in a text sent to a dimensional CAD software and save the trouble of inputting data representing a revised content in a drawing.

[0009]

According to a first aspect of the present invention, there is provided a CAD data management apparatus comprising: first storage means for storing a plurality of types of data representing a three-dimensional three-dimensional model; Three-dimensional CAD software that can be revised in accordance with product design work to obtain a desired three-dimensional shape, and a function of expressing a product to be designed as a two-dimensional drawing based on the data revised by the three-dimensional CAD software If there is, a second storage means for extracting the comparison contents of the data before and after the revision using the function of the three-dimensional CAD software and storing the comparison contents in association with the revised data, A function to automatically create a two-dimensional CAD as a text explaining the contents of the revision
It is provided in the software.

A CAD data management device according to a second aspect of the present invention is the CAD data management device according to the first aspect of the invention, wherein the identification symbol for indicating the position of the revised portion modified according to the design work of the target product is the second symbol. It has a function of storing in a storage means and a function of generating a revision symbol based on an identification symbol and associating the revision symbol with a revised portion in a two-dimensional drawing.

A CAD data management device according to a third aspect of the present invention is the CAD data management device according to the second aspect of the present invention, wherein a function of storing the history of the date and time revised in accordance with the design work of the target product in the second storage means. And a function of further adding a symbol indicating a revision history to the above-mentioned revision symbols.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows a flow chart of three-dimensional CAD software and two-dimensional CAD software when a product to be designed is revised according to the present invention. Figure 1 (a) and Figure 1 after revision
In (b), the difference before and after the revision, in which the radius of the rotating body is changed from 10 to 12 and the size of the chamfer is changed from 3 to 4, is acquired. Next, in the projection view creation function 2, the function of the 3D CAD software is used. Is used to create a projection drawing 1 (d) from the three-dimensional model drawing 1 (c) in accordance with the projection direction input from the input device 30, and then the revision insertion function 3 obtains the revision acquisition function 1 Automatically inserts the difference before and after the revision obtained in step 2 into the two-dimensional drawing.

A three-dimensional C for realizing the flow chart of FIG.
FIG. 2 shows a transition of data created in the primary storage device 34 created by the AD software and the two-dimensional CAD software, and shows a three-dimensional model data diagram 2 (a), a two-dimensional drawing data diagram 2 (h), and a correction content table. FIG. 2D shows all data stored in the primary storage device 34.

The three-dimensional model data FIG. 2A is composed of component data 8 indicating the structure of a component and assembly data 9 indicating an assembled state of a group of components. FIG. ) Is composed of geometrical shape data 10 and mass property data 11 and layer data 12 having information such as the weight and volume of the part, and the geometrical shape data therein is shown in FIG. Element I for each
D, shape type, dimension values, etc., and two-dimensional drawing data FIG. 2 (h) is composed of reference model data 17, view data 18, layer data 19, and annotation data 20, and further includes notes therein. Data Figure 2 (i) is Note I
D, coordinate positions, character strings, and other information.

When a change of the shape is instructed from the input device 30 shown in FIG. 5 by interactive operation of three-dimensional CAD software as shown in FIGS. 1A and 1B, the central processing unit 31 performs the processing, and Regarding the component data 8 included in the three-dimensional model data of FIG. 2A stored in the storage device 34,
The contents of the geometric shape data 10 are changed, and the processing result is displayed on the display device 33. In this case, the function provided in the three-dimensional CAD software is used to change the geometric shape data 1
0 is detected, and the detection result is stored in the correction content table FIG.

FIG. 3 is a diagram showing a flow of replacing the correction content stored in the correction content table with a note on a two-dimensional drawing for explaining the revised content, and shows the correction content detected by the three-dimensional CAD software. (A) is the correction target 23
, A correction type 24, and a correction content 25, and each piece of information is represented by 26 as "correction target", "correction content",
Replace the document with "correction type" and create a note.

The annotation figure 2 (f) created as described above is inserted into the annotation data 20 of the two-dimensional drawing data FIG. 2 (h) in the primary storage device as 21 and the coordinate position as 4 Is set in such a way that the number of items to be inserted is lowered from a predetermined point.

Embodiment 2 FIG. When an instruction to change the shape of the three-dimensional model is given from the input device 30 by interactive operation of the three-dimensional CAD software as shown in FIGS.
When it is detected that the geometrical shape data of FIG. 2C has been changed by the function of the three-dimensional software, and each time a revised point is detected, the detection result is serially numbered.
It is stored in the correction content table as shown in FIG.

The central processing unit 31 creates a revision symbol as shown in FIG. 2 (g) based on the number of the correction content table,
As a note with a triangular character decoration as revision symbol 6
The data is inserted into the annotation data 22 of (i) as shown in FIG. 22 and the coordinate position is set according to a rule such that it is arranged to the right for each number of revisions from a predetermined position, and this is displayed on the display device 33 as a processing result.

Regarding the revision symbols arranged to the right for each revision number, 5
Move to the appropriate position indicating the revised position as shown in (1) to complete the drawing.

Embodiment 3 When an instruction to change the shape of the three-dimensional model is given from the input device 30 by interactive operation of the three-dimensional CAD software as shown in FIGS.
The change of the geometric shape data of FIG. 2C is detected by the function of the three-dimensional software, and the date and time of the change point is stored in the correction content table of FIG.

Each time a design result is delivered to the manufacturing side, the release history table 28 shown in FIG.
Prepared on the next storage device 34, and when inserting the revised content into the two-dimensional CAD software, the correction date and time 27 of the correction content table and the release history table 28 are stored as shown in FIG. A comparison is made between which point of time and which point contains the correction date and time, and A, B, C,
The sub-numbers sequentially assigned in the order of D,... Are obtained, and the sub-numbers are added to the revision symbols and inserted as shown in FIG.

[0023]

According to the present invention, the three-dimensional CAD software visually grasps the contents of the product and makes it easy to grasp the overall shape of the product. 3D CAD software and 2D C
Each AD software has its advantages.

3D CAD software and 2D CAD
In order to utilize the advantages of both software, it is necessary to create data for both, and the work of creating data is doubled, but this invention eliminates this duplicative work, drawing editing and manufacturing data There is an effect that the creation work and the like can be efficiently performed.

[Brief description of the drawings]

[Fig. 1] 3D CAD when the product to be designed is revised
FIG. 3 is a flowchart of software and two-dimensional CAD software.

Fig. 2 3D CAD software and 2D CAD
FIG. 4 is a diagram illustrating a transition of data created in a primary storage device created by software.

FIG. 3 is a diagram illustrating a method of generating a note explaining a revised content from a difference in a three-dimensional model detected by three-dimensional CAD software of the CAD data management device according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a method of acquiring a sub number for a revised content of the CAD data management device according to the third embodiment of the present invention.

FIG. 5 is a conceptual diagram illustrating a management device for data generated by both the three-dimensional CAD software and the two-dimensional CAD software.

[Fig. 6] Conventional 3D CAD software and 2D C
It is a flowchart which shows the display function of the correction content of the product of AD software.

[Explanation of symbols]

1. Revision acquisition function, 2. Projection view creation function,
7 Revision symbol, 8 Part data, 20 Note data, 2
7 Correction date and time, 28 Release history table, 30 input device, 31 Central processing unit, 41 Reference model data, 4
2 View data.

Claims (3)

[Claims] 1. A first storage means for storing a plurality of types of data representing a three-dimensional three-dimensional model, and the plurality of types of data are revised in accordance with a design work of a target product to obtain a desired three-dimensional shape. 3D CAD software that can obtain the data, second storage means for storing the data after the above-mentioned revision in association with the contents of comparison before the revision, and a design object based on the data revised by the above 3-dimensional CAD software. A function of automatically creating a description of a product as a two-dimensional drawing and a comparison between the data after the revision read from the second storage means and the data before the revision as a description in a document on the two-dimensional drawing. And a two-dimensional CAD software having the following. 2. A function of storing an identification symbol for indicating a position of a revised portion in accordance with revision of the data in the second storage means, and generating a revision symbol based on the identification symbol and generating the revision symbol. 2. The CAD data management apparatus according to claim 1, wherein the two-dimensional CAD software has a function of creating a two-dimensional CAD in a two-dimensional drawing in association with the revised part. 3. A function of storing, in the second storage means, a history of the date and time when the data was revised in accordance with the revision of the data.
3. The two-dimensional CAD software according to claim 2, further comprising a function of further adding a symbol indicating a revision history to the revision symbols.
A CAD data management device according to any one of the preceding claims.