JPH10301972A - Cad data managing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a CAD data managing device capable of sharing parts table data, layer information and drawing correction contents and permanently maintaining and managing data in order to execute efficient design work by using both of two-dimensional(2D) CAD software and three-dimensional(3D) CAD software to be used for executing machine designing work. SOLUTION: The parts constitution of a 2D drawing 1 and that of a 3D model 4 are respectively acquired from 2D drawing data 5 and 3D model data 9 stored in a primary storage medium. Processing for collecting parts existing in common in both of the 2D drawing 1 and the 3D model 4 as one group and collecting parts existing in only either one of the drawing 1 and the model 4 as a group is executed, its processing result is stored in 2D/3D shared parts table data storage area 8 and a parts list 12 for the whole product is prepared.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CA generated by CAD software used for designing a mechanical structure.
The present invention relates to a D data management device.

[0002]

2. Description of the Related Art In the field of mechanical design, two-dimensional CAD software has been used for creating drawings efficiently by substituting the operation of writing drawings by hand on paper with the operation of a computer. With the progress of information processing technology in recent years, large-scale geometric figures can be processed at high speed, and three-dimensional CAD software for visually expressing the shape of a product with a three-dimensional depth has been developed.
Also, in order to create data on an NC machine tool that automatically processes mechanical parts by numerical control, three-dimensional CAD software capable of three-dimensionally expressing a product geometric shape on a computer is widely used. In order to convey the details of drawing corrections to the manufacturing workers by text, two-dimensional CAD software that simulates writing text and graphics on paper to create drawings is still widely used. Therefore, it is necessary to use two-dimensional CAD software and three-dimensional CAD software in combination in order to design and manufacture the same product, and the time and effort for creating data are increasing.

FIG. 7 is a conceptual diagram for explaining a CAD data file management device. 60 is an input device such as a keyboard, and 61 is a CA which receives an operation command from the input device.
D is a central processing unit for processing the operation command, 62 is a display for displaying the processing result, 59 is a main storage device for temporarily storing the contents of the processing, and 63 is a magnetic storage for storing the processing result. A primary storage medium 64 represented by a disk device is a secondary storage medium represented by a magnetic tape for maintaining data permanently. Conventionally, when a drawing is created, for a part such as a standardized part that can uniquely identify which part is a number, a geometric shape of the part is drawn by describing the number in the drawing. An abbreviated drawing method for omitting this is widely used, and the two-dimensional CAD software includes means for detecting a component described by the abbreviated drawing method as information on a parts table.

FIG. 8 shows a method in which the two-dimensional CAD software detects parts described in the drawing as information of a parts table by an abbreviated drawing method. Reference numeral 65 denotes drawing contents to be displayed on a display; 2 stored in the storage device
It is a schematic representation of dimensional drawing data. In FIG. 8, the washer 66 is described by a character string indicating part information such as a part number and a name by an abbreviated drawing method and is not described by a geometric shape. Each time such an abbreviation method is performed, it is stored in the data storage area 68, and the symbol data storage area 68 is searched at the stage of creating the parts table, and the character string of the corresponding parts information stored earlier is stored. Is acquired, the content is additionally updated in the parts table data storage area 69, and the contents of the parts table data storage area 69 are further updated to create a parts table on the screen.

FIG. 9 shows a method of detecting information of a parts table by three-dimensional CAD software.
A parts list to be described in the dimensional CAD drawing, 72 is 3
Reference numeral 73 denotes a three-dimensional model created by the three-dimensional CAD software. The three-dimensional model 73 schematically represents three-dimensional model data stored in a storage device. In FIG. 9, when assembling parts sequentially into the three-dimensional model, the corresponding part information is stored in the assembly data storage area 74 each time, and the assembly data storage area 74 is searched when the next part table is created. Is acquired, the contents are additionally updated in the parts table data storage area 75, and the contents of the parts table data storage area are displayed and updated to create a parts table on the screen. FIG. 10 shows an example in which the parts list of the product to be designed is created by using both the two-dimensional CAD software and the three-dimensional CAD software. The three-dimensional model 77 created by the three-dimensional CAD software includes the nut, piston, and rod geometry. Since there is a geometrical shape, these three parts information can be obtained by searching the parts table data area 79 in the three-dimensional model data storage area 78. However, for the washer part 81 described by the abbreviated drawing method, 2 parts information is obtained. Since it exists only on the side of the two-dimensional CAD software, the parts table data area 83 of the two-dimensional drawing data storage area 82 must be searched.

For this reason, the two-dimensional CAD shown in FIGS.
Software and 3D CAD software have separate BOM data storage areas and have separate BOM display update functions, so it is not possible to display and manage all BOMs of the product to be designed. Each time the product content is corrected, it is necessary to find out whether the correction target component is described by two-dimensional CAD software or three-dimensional CAD software, and the operation efficiency is extremely poor.

[0007] In the two-dimensional CAD software, when describing the product content, it is expressed by a combination of several drawing elements such as a geometric shape, a dimension line, a note character string, and a drawing frame. In many cases, it is easier to see the drawing on the screen and the drawing creation efficiency is higher when the other drawing elements are erased on display.Therefore, each drawing element is separately stored in a storage area called a layer and displayed for each layer. Is provided. In addition to using the same three-dimensional CAD software as the two-dimensional CAD software, a two-dimensional CAD that expresses the product shape as a two-dimensional drawing
Compared to the data of D software, depth information is required rather than three-dimensional representation, and the geometric data capacity is large, so faster geometric processing is required. For geometric shapes that do not significantly affect the entire component structure, such as the chamfering and corner R, the shape information is stored in a layer separate from the entire component structure, It has a function of classifying the screen display contents to reduce the amount of geometric processing of the computer.

FIG. 11 shows a difference between the layer functions of the two-dimensional CAD software and the three-dimensional CAD software. Reference numeral 92 denotes a layer function of the two-dimensional CAD software, and an all-layer display state 93 displays all data. A state in which the geometrical shape 94, the auxiliary line 95, and the dimension line 96 are stored in separate storage areas in a layered structure, and one or a combination thereof is selected each time to select information necessary for drawing creation. It is.

Reference numeral 86 denotes a layer function of the three-dimensional CAD software. An all layer display state 87 is a state in which all data is displayed, and a geometric shape (basic figure) 88, a geometric shape (chamfered) 89, and an auxiliary line 90. , The dimension lines 91 are stored in separate storage areas, and one or a plurality of combinations are selected each time to select information necessary for drawing creation, or to increase the speed by omitting the geometric processing. . In the two-dimensional CAD layer 92, the geometrical shape 9
4, three auxiliary lines 95, and three dimension lines 96. In the three-dimensional CAD layer 86, a basic figure 88, a chamfer 89, an auxiliary line 90, They are classified by four dimension lines 91. Thus, 2D CAD software and 3D CA
In D software, since there is a difference in the use of the layer function, a projection view of a three-dimensional model created by three-dimensional CAD software viewed from a certain viewpoint direction is created. On the side of the two-dimensional CAD software, information such as the all-layer display state 93 exists in one layer, and after the handover, the geometrical shape 9 is obtained by the function of the two-dimensional CAD software.
4. An operation for classifying layers such as the auxiliary line 95 and the dimension line 96 is required.

The three-dimensional CAD software has a function of comparing and displaying before and after correction as shown in FIG. 12 when a product shape is corrected. 97 is before correction, 98 is after correction, and the dimension value of the chamfer has been corrected. This is confirmed by comparing and displaying the geometric shape before and after the correction. At this time, if all geometric shapes before and after the correction are described, the contents of the drawing become complicated and difficult to read as indicated by 99.
Projection diagram 100 of a two-dimensional model viewed from a certain viewpoint direction
Is created using triangular projection with the function of 3D CAD software, and then transferred to 2D CAD software.
A method called a revision symbol such as 02 is used to clearly indicate the location where the correction content exists, and a method of explaining the correction content in characters such as 103 is used. The character string and the coordinate point information input by the input device are judged by the processing device, and the process of additionally displaying the revision symbol and the correction content on the display is performed. However, in this method, when the product shape is corrected by the three-dimensional CAD software, the two-dimensional CA is corrected each time.
It is necessary to re-enter revision symbols and corrections in D software.

[0011] The two-dimensional CAD software has a function of storing data again in the secondary storage medium every time the creation work is completed for each drawing and maintaining the data permanently.
FIG. 14 is a diagram showing a computer configuration and a logical configuration of data in the two-dimensional CAD software. Reference numeral 109 denotes a display and an input / arithmetic unit, which creates and edits product contents and is represented by a magnetic disk 110. When the drawing creation operation is completed, the drawing data 112 is created and stored in the two-dimensional drawing storage area 113 on the secondary storage medium 111 such as a magnetic tape. Remember each time. FIG. 13 shows an example in which the shape correction of a part which is three-dimensional CAD software affects other parts, and the shape correction of another part is also required. Reference numeral 104 denotes the shape of each part before the shape is corrected. Numeral 105 indicates the shape of the component after the shape correction. When the height of the piston part 107 is corrected, the height of the rod part 108 is also corrected so that the rod part 108 passes through the shaft of the piston part 107 because the rod part 108 passes through the hole in the shaft of the piston part and is tightened with the bolt part 106. Need to be done.
When a part is modified, when modifying other parts that affect it, it is necessary to confirm the previous part that caused the modification on the display screen and modify it on the computer hardware. It is necessary to store a plurality of target parts and a plurality of parts that have caused a correction on a primary storage medium having a high access speed. However, when designing a product having a complicated structure with many parts, Many components are stored on the primary storage medium for a long period of time. For a primary storage medium with a high access speed represented by a magnetic disk, data may be lost due to a device failure, and as described above, CAD data being designed is stored in the primary storage medium for a long period of time as described above. If left as it is, the result of the design is likely to be lost.

[0012]

SUMMARY OF THE INVENTION The present invention makes use of the advantages of two-dimensional CAD software that can convey assembly procedures and details of drawing corrections using characters and symbols, and three-dimensional CAD software that makes it easy to visually grasp the product shape. Combined,
An object of the present invention is to provide a data management device necessary for efficiently performing design work.

[0013]

According to a CAD data management apparatus of the present invention, a three-dimensional model indicating the same design object and a part of a part configuration are created using an abbreviated drawing method.
A storage medium in which part data such as the name and part number of each part in the three-dimensional drawing is stored, and a part in which the three-dimensional model read from the storage medium and the part data in the two-dimensional drawing coincide with each other are common parts. It is provided with a parts list creating means for organizing parts data that do not match with each other and creating a parts table as one part as it is.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 of the Invention FIG. 1 is a diagram showing a first embodiment. A two-dimensional and three-dimensional common parts table data storage area 8 is provided as shown in FIG. 1, and a symbol described in an abbreviated manner like a washer 3 on a two-dimensional drawing 1 by two-dimensional CAD software is used for two-dimensional CAD software. Is used to extract washer data corresponding to a washer into the symbol data storage area 7 of the two-dimensional drawing data 5 each time drawing is performed, and further updates the parts table data area 6 while simultaneously using the two-dimensional and three-dimensional shared parts. The table data storage area 8 is additionally updated at the same time, and with respect to the three-dimensional model 4 created by the three-dimensional CAD software, the part data corresponding to the nut, piston and rod is assembled using the function of the three-dimensional CAD software. Each time you assemble it into a 3D model,
The assembly data 10 and the parts table data 11 in the three-dimensional model data 9 are additionally updated, and the two-dimensional and three-dimensional common parts table data storage area 8 is additionally updated simultaneously.

In the two-dimensional and three-dimensional shared parts table data storage area 8, in addition to the part number for uniquely specifying the part and the number of parts to be assembled, for example, 0 if the part is created by two-dimensional CAD. Is provided with a flag field to enter 1 if created by 3D CAD software.
Each time a part is assembled by both the AD software and the three-dimensional CAD software, it is additionally registered in the two-dimensional and three-dimensional common parts list data storage area 8 one by one (one line) each time, so that the parts list of the entire product can be obtained. 12 can be generated or the display can be updated.

Most of the two-dimensional CAD software includes:
The function of indicating the correspondence between the number of the parts table 12 of the entire product and the geometrical shape in the two-dimensional drawing 1 is provided by describing a symbol called a balloon such as 2 in the two-dimensional CAD software. In order not to impair the function,
A function is provided for automatically describing the balloon 2 for the part corresponding to the row where 1 is stored in the flag column of the two-dimensional and three-dimensional shared parts table data storage area.

Embodiment 2 of the Invention In the two-dimensional CAD software, when describing product contents, several drawing elements such as geometric shapes, dimension lines, note strings, drawing frames, etc. are separately stored in storage areas called layers. The 3D CAD software has a function to display only necessary drawing elements on the screen to make the screen easy to view and to improve the drawing creation efficiency.
Since it has a layer function different from that of the two-dimensional CAD software, there is no correspondence between layers between the two-dimensional CAD software and the three-dimensional CAD software.
When transferring the two-dimensional model to the two-dimensional drawing, the same amount of information as in the display state of all layers as shown by 93 in FIG. 11 is concentrated and transferred to one layer. , An auxiliary line 95, a dimension line 96, and the like are required. The present invention associates layer information included in a two-dimensional CAD drawing with layer information included in a three-dimensional model, and automatically transfers the three-dimensional model to the two-dimensional drawing based on the association when transferring the three-dimensional model to the two-dimensional drawing. A means for creating a layer is provided.

A layer conversion table 14 is prepared in the three-dimensional model data 13 shown in FIG. 2, and the content of the layer conversion table 14 is described with a code such as 15 as a layer name and a group ID of the three-dimensional model for each layer. Memorize things, 3D CA
When a new layer is created by the D software, a group ID is designated and stored each time. When a 3D model is transferred to a 2D drawing, 3D CAD software is used for 3D CAD software for each layer corresponding to the group ID. In order to display the model, create a projection, and deliver the model to the two-dimensional CAD software, in the layer conversion table 15, the layer-1 (basic figure) and the layer-2 (chamfer) have the same group ID. Simultaneous display of two layers on 3D CAD software, resulting in a geometric shape with chamfers on the upper and lower surfaces of a cylinder, creating a projection using triangular projection, etc., and transferring it to the 2D CAD side .

Embodiment 3 In the three-dimensional CAD software, when there is a correction in the product shape, a function of comparing and displaying on the screen the product shape before correction and the product shape after correction and confirming the correction contents. However, if both the product shape before and after the correction is handed over to the two-dimensional CAD software and converted into a two-dimensional drawing, the contents of the drawing become complicated and the drawing becomes unreadable. In FIG. 12, the correction content is corrected, as shown at 101, and the product shape and a revision symbol 102 indicating the correction position are added. It has the function to do. However, when a 3D model is handed over to a 2D drawing and a drawing is created, the correction position and the correction contents are defined in advance by the operation of the 3D CAD software, but the 2D CA
It is necessary to designate the correction position again by operating the D software and to input the correction contents in characters. According to the present invention, every time a correction operation of a three-dimensional model is performed, the correction content is instructed and stored for the character, and when transferred to the two-dimensional CAD software, the correction position is automatically given, and the correction content is stored in the three-dimensional model A means for automatically adding the information stored therein is provided.

FIG. 3 shows a flow of transferring correction contents operated by the three-dimensional CAD software to the two-dimensional CAD software.
Reference numeral 8 denotes a corrected three-dimensional model in which the dimensions of the portion corresponding to the chamfer have been corrected, but the correction details table 20 is stored in the three-dimensional model data 19 in order to automatically transfer the correction details to the two-dimensional CAD software. A new number is provided, and the contents are assigned to a serial number automatically assigned each time a correction is made, such as 24, and a geometric shape for identifying the corrected geometric shape in the three-dimensional model. The stored shape element 1D and a character string describing the content of the correction are stored for each correction. 3D model 16 is converted to 2D drawing 21
, The contents of the correction content table 24 are read one by one from the beginning. For example, for the number 1, the correction position is first set when the shape correction is performed in advance.
The corrected geometric shape is acquired from the shape element ID stored in No. 4 and a revision symbol 22 enclosing the number 1 in a square at the position on the two-dimensional drawing is drawn, and the character indicating the corrected content of the number 1 is drawn. A column is automatically added to the revision content column 23. If the description is insufficient, a description such as 26 (vertical, horizontal, etc.) input by the user is added using the input device of the three-dimensional CAD software, and the revision is performed. The contents of the contents column 25 are automatically pasted into the two-dimensional drawing.

Embodiment 4 In the two-dimensional CAD software, every time a creation operation is completed for each drawing as shown in FIG. 14, data is stored again in a secondary storage medium such as a magnetic tape. It has a function to maintain data permanently, but when using 3D CAD software together, in order to omit unnecessary work and perform only necessary data input, as shown in FIG. It is necessary to create a projection view from the three-dimensional model using the triangular projection method or the like, and store the projection view in the secondary storage medium while maintaining the reference relationship between the delivery source three-dimensional model and the delivery destination two-dimensional drawing. .

In FIG. 4, reference numeral 29 denotes a transition of the display contents on the display device when the two-dimensional CAD software and the three-dimensional CAD software are used together, and 32 denotes a magnetic disk device corresponding to the display contents on the display 29. Indicates the contents of data stored on the primary storage medium as represented by the reference numeral 35. The data 35 is stored on the magnetic tape in order to store the data permanently every time the design is completed. 2 shows a configuration of data stored on a secondary storage medium as represented. When the three-dimensional CAD software transfers the projection created from the three-dimensional model 27 by the triangular projection method or the like to the two-dimensional CAD software and creates the two-dimensional drawing 28, the three-dimensional model of the delivery source is placed on the primary storage medium. A pair of the data 30 and the two-dimensional drawing data 31 to be delivered is created.

A three-dimensional model 27 is created with three-dimensional CAD software, the projection is transferred to the two-dimensional CAD software, and the manufacturing method and the contents of the drawing correction are written in characters and symbols using the two-dimensional CAD software. Two-dimensional drawing storage areas 33 and 3 provided on a secondary storage medium 35 with pairs of three-dimensional model data 30 and two-dimensional drawing data 31
It is stored one by one in the dimensional model storage area 34.

Embodiment 5 of the Invention In FIG. 5, two-dimensional C
When designing the assembled state of a plurality of parts by using the AD software and the three-dimensional CAD software together, the display contents on the display device and the primary storage medium represented by the magnetic disk and the magnetic tape represented by the magnetic disk 2
The storage contents on the next storage medium are shown.

In order to express the assembled state with the three-dimensional CAD software, a three-dimensional model of an individual part such as a nut, a piston and a rod like a part 37 is inserted between a plurality of parts to be combined. Instruct and assemble assembly conditions 38 such as matching surfaces, create a three-dimensional model as in the assembly state 39, and perform three-dimensional CAD.
A projection diagram is created by software using a triangular projection method or the like, and is transferred to the two-dimensional CAD software to create a two-dimensional drawing 40. Each time a 3D model 37 for each component, a 3D model 39 in an assembled state, and a 2D drawing 40 are created and displayed on a display, component model data 43 indicating the geometrical shape of the component on a primary storage medium. Assembly condition 3
8 and an assembly model 44 and two-dimensional drawing data 45 for creating an assembly state 39 from the parts group.

Each time the design of an assembled state combining parts or a plurality of parts is completed, the data is stored in a secondary storage medium such as a magnetic tape in order to maintain the data permanently. Holds only the assembly condition 38 of which part and which part and how it is combined, and since the geometric shape of each part exists in the part model 37, the assembly state 39 is reproduced. To do this, the assembly model data 44
And the part model data 43 are required. After the design of each part is completed, when the parts are assembled and the assembled state is designed, the storage contents on the secondary storage medium for maintaining data permanently are stored in the two-dimensional drawing storage areas 47 and 3. As in the case of the two-dimensional model storage area 48, a new storage content list table 49 is provided on the secondary storage medium, and two-dimensional drawing data and three-dimensional model data stored on the secondary storage medium are stored. Each time, the data name is stored, and the three-dimensional model data name stored in the three-dimensional model name storage area in the storage list table is subjected to matching processing with other data names one by one. Are detected.

Embodiment 6 of the Invention FIG. 6 shows a case where the data created by the two-dimensional CAD software and the three-dimensional CAD software is stored in a secondary storage medium such as a magnetic tape every time the design is completed. This shows processing when data duplication occurs.

Prior to the registration of the entities of the two-dimensional drawing data and the three-dimensional model data, the data names are registered in the storage content list table 53 prepared in advance on the secondary storage medium 58, and the storage content list is registered. The three-dimensional model data names in the three-dimensional model name storage area 54 in the table 53 are subjected to matching processing with other data one by one to detect duplication of data. Next, when registering the entity data of the two-dimensional drawing data and the three-dimensional model data, the data having the duplicate name detected from the contents of the storage list table 53 is excluded and registered, and a warning is issued.

[0029]

As described above, according to the present invention, there is an effect that it is possible to eliminate the duplication of data creation work by using both the two-dimensional CAD software and the three-dimensional CAD software, and to realize efficient drawing editing and manufacturing data creation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.

FIG. 6 is a diagram showing a sixth embodiment of the present invention.

FIG. 7 is a conceptual diagram showing a computer hardware configuration according to the present invention.

FIG. 8 is a diagram showing a parts list creation function of conventional two-dimensional CAD software.

FIG. 9 is a diagram showing a parts list creation function of conventional three-dimensional CAD software.

FIG. 10 is a diagram showing a method of creating a parts list when both conventional two-dimensional CAD software and three-dimensional CAD software are used.

FIG. 11 is a diagram showing a difference between layer functions of conventional two-dimensional CAD software and three-dimensional CAD software.

FIG. 12 is a diagram showing a method of describing the drawing correction contents of conventional two-dimensional CAD software and three-dimensional CAD software.

FIG. 13 is a diagram showing a method of correcting a three-dimensional model of conventional three-dimensional CAD software.

FIG. 14 is a diagram illustrating a method of storing drawing data of conventional two-dimensional CAD software in a secondary storage medium.

FIG. 15 shows drawing data and 3 in the case where conventional two-dimensional CAD software and three-dimensional CAD software are used together.
FIG. 3 is a diagram illustrating a method of storing dimensional model data in a secondary storage medium.

[Explanation of symbols]

8 2D and 3D shared parts table data storage area, 15
Layer conversion table, 24 Correction contents table, 33
2D drawing storage area, 34 3D model storage area, 49 Storage contents list table.

Claims (1)

[Claims] 1. A three-dimensional model representing the same design object and part data such as a part name and a part number of each part of a two-dimensional drawing created by using an abbreviated drawing method for a part of a part configuration are respectively stored. A part in which the part data of the three-dimensional model and the part data of the two-dimensional drawing read out from the storage medium coincide with each other is arranged as one common part. A CAD data management apparatus, comprising: a parts table creating means for creating a parts table as parts.