JPH0241573A - Solid cad system - Google Patents

Abstract

PURPOSE:To perform uniform management of an area where data used by an application program or the like is stored by uniformly managing accessory data required for design and production together with shape data with respect to a solid model. CONSTITUTION:Shape data 31 having a winged edge structure or the like exists as main data of a model 30, and a required number of two-dimensional accessory data 32, three-dimensional accessory data 33, and three-dimensional plane data 34 are added. Since various accessory data are uniformly managed as data belonging to shape data 31, the cooperative processing of an application processing part 13 and a solid model creating and editing processing part 14 is easily performed, and the processing burden on the application processing part 13 is reduced. Thus, accessory data required for design and production of the solid model are uniformly managed together with shape data.

Description

[Detailed Description of the Invention] [Summary] A solid CAD system that handles the three-dimensional shape of an object as a solid model and that facilitates the management of attached data according to the application in a system that has creation and editing processing functions for the solid model. Regarding.

Data necessary for designing and manufacturing solid models,
The purpose is to provide a means of unified management along with shape data.

A shape data storage unit in which shape data of the solid model is stored for each solid model.

A two-dimensional attached data storage unit that stores two-dimensional attached data, a three-dimensional attached data storage unit that stores three-dimensional attached data, and three-dimensional plane data that stores figure data on a plane in three-dimensional space. The apparatus is configured to include a storage unit and an attached data pointer table having address information for each of the storage units, as well as creation and editing processing means for data stored in each of the storage units.

[Industrial application field]

The present invention handles the three-dimensional shape of an object using a solid model,
The present invention relates to a solid CAD system that facilitates the management of attached data according to the application in a system that has creation and editing processing functions for solid models.

[Prior art] Processing systems that handle the three-dimensional shape of objects using computers can be roughly divided into wire CAD systems that handle wire frame models that define objects only by edges, and solid models that define objects as a single block. There are solid CAD systems that we handle.

In a wire CAD system, all data such as one drawing are treated in parallel as being at the same level, but in a solid CAD system, there is a solid model that is the original purpose of creation, and other data is attached to it. Created and edited separately as . Therefore, a data structure that handles all data including shape data in parallel is not suitable.

In conventional solid CAD systems.

In general, attached data other than three-dimensional shape data.

For each application, a storage area was secured and managed individually according to the purpose of the attached data.

[Problem to be solved by the invention]

In the solid CAD system, in addition to the main data that determines the shape of the solid model, there is also a lot of additional data such as three-dimensional drawing data used to create the solid model, data such as two-dimensional drawings and characters, and wire data. is required. Conventionally, all of this attached data has been managed by the application computer, so there is a problem in that the processing load for securing storage area for the data is heavy.

In addition, 1. For example, if a part of the figure shown in a three-dimensional view is changed, it is not possible to provide a general-purpose processing function on the system side, such as automatically reflecting the change in the shape data of the solid model. The problem is that it cannot be done and everything has to be developed by the application.

The present invention makes it possible to solve such problems, and therefore,
The purpose is to provide a means to uniformly manage attached data necessary for designing and manufacturing solid models, along with shape data.

[Means to solve the problem]

FIG. 1 is a diagram explaining the principle of the present invention.

In FIG. 1, 10 is a processing unit consisting of a CPU, memory, etc., 11 is a display W position such as a CRT display, and 1
2 is an input device such as a keyboard or tablet; 13 is an application processing unit that performs processing related to applications such as creation of numerical control (NC) data and structural analysis; and 14 is a solid model that performs creation and editing processing for solid models. Creation/editing processing department, 15 is sledding
The node model data section 16 is the solid main data section, which is basic data that always exists regarding the solid model.
Reference numeral 7 denotes an attached data section which is ancillary data necessary for the solid model depending on the field of application, 18 a shape data storage unit which is a storage area in which shape data is stored, 19 an attached data pointer table, and 20 a secondary data section. 21 is a three-dimensional attached data storage unit, and 22 is a three-dimensional plane data storage unit.

Reference numeral 23 represents an external storage access control unit that controls access to the external storage device, and 24 represents an external storage device such as a magnetic disk device.

In this invention, for one solid model.

Rather than simply managing only shape data, by linking the attached data section 17 to the solid main data section 16, which mainly consists of shape data, this attached data section 17 can include data necessary for design and manufacturing. We are trying to make it possible to have a specific purpose.

Furthermore, regarding this attached data section 17, two separate sections are provided in which each data is stored, so that management can be divided into five categories corresponding to at least three types of uses: two-dimensional attached data, three-dimensional attached data, and three-dimensional plane data. Dimensional attached data storage unit 20 Three-dimensional attached data storage unit 21.
A three-dimensional plane data storage unit 22 is provided.

The two-dimensional attribute data storage unit 20 is a storage area in which two-dimensional attribute data including two-dimensional drawings and character data regarding solid models are stored. The three-dimensional ancillary data storage unit 21 is a storage area in which three-dimensional ancillary data used by an application regarding a solid model is stored. The three-dimensional plane data storage unit 22 is a storage area in which graphic data on a plane in a three-dimensional space where a solid model is placed is stored. A plurality of storage units for storing these attached data can be provided for one solid model depending on the shape of the model and the request of the application processing section 13.

An attached data pointer table 19 is provided for reading and writing data to each of these storage units, and each entry in the attached data pointer table 19 is as follows:
It has pointers that are information on the type of attached data and address information for each storage unit.

The solid model creation/editing processing section 14 has means for managing the attached data pointer table 19 and means for accessing the attached data section 17. for example.

When the application processing unit 13 requests the solid model creation/editing processing unit 14 to store new three-dimensional attached data, the solid model creation/editing processing unit 14 cuts out the three-dimensional attached data storage unit 21 from the storage area and stores it. The address is registered in the attached data pointer table 19, and new three-dimensional attached data is set in the storage area. When referring to or updating attached data, the unit in which the data is stored is accessed via the attached data pointer table 19.

Among the solid main data section 16 and the attached data section 17, those that need to be saved are stored in the external storage access control section 23.
The information is written to the external storage device 24 at a specified timing or at an appropriate timing.

The shape data stored in the shape data storage unit 18 as main data is data represented by a boundary expression model using a winged energy structure, for example.

[Effect]

FIG. 2 is a conceptual diagram of a data structure according to the present invention.

When a user (application) views one solid model, in the present invention, the view is as shown in FIG. 2. That is, as the main data of the model 30, the shape data 3 due to the winged engine structure etc.
1 exists, and the necessary number of two-dimensional attached data 32. 3D attached data 33. Three-dimensional plane data 34 is added.

The two-dimensional attached data 32 includes, for example, frame and character information when displaying the shape of a solid model as a presentation, and two-dimensional drawing information referred to when creating the shape.

The three-dimensional attached data 33 is data that can be freely handled by the application.1 For example, it represents the cutter used when creating the shape of a solid model for use in NC analysis, and its motion locus. Is it data?

This is mesh data in which a shape is divided into grids for use in structural analysis using the finite element method (FEM).

The three-dimensional plane data 34 is data on dimension lines for the shape of the solid model when viewed from a certain direction, and data when the shape as viewed from the certain direction is drawn.

In this way, in the present invention, various attached data.

As something that accompanies the shape data 31 according to the purpose.

Since they are managed in a unified manner, it becomes possible to easily perform cooperative processing between the application processing unit 13 and the solid model creation/editing processing unit 14 shown in FIG. 1, thereby reducing the processing load on the application processing unit 13. It becomes possible to do so.

〔Example〕

FIG. 3 is an example of model creation/editing processing according to an embodiment of the present invention, FIG. 4 is an example of how a screen is used according to an embodiment of the present invention, and FIG. 5 is an example of attachments according to an embodiment of the present invention. An example of how to use the data is shown.

When creating a new solid model, the processes from fat to tel shown in FIG. 3(a) are performed.

fel First, create a shape with two trunks. The shape is created using the display device 11. shown in FIG. This is performed by conversation processing via the input device 12, analysis processing of drawing input data input using a drawing input device (not shown), and the like.

fbl Other shapes used when creating the main shape, and other necessary shapes, are included as attached data, and their uses and
Secure a storage unit depending on the type.

Set to that storage unit.

(c+ If necessary, create a new shape and add the shape and attached data to the model.

By repeating this process, the model will be completed.

In editing the solid model, processing (dl to fl) as shown in FIG. 3 (b) is performed.

fdl Change the shape of the main body via a conversation processing interface or the like.

fel When the main shape data is changed, the attached data pointer table 19 is referred to to check whether there is three-dimensional plane data.

(Ge) If there is 3D plane data, change the 3D plane data according to the change in the shape data of the two trunks.

Similarly, other attached data can also be modified as necessary in accordance with changes in shape.

In addition, since the shape data and attached data for each model are managed in an integrated manner, it is possible to automatically change the shape data, which is two main data, in response to a change in the 3D plane data. be.

In the shape data storage unit 18 shown in FIG.

The part shape of the solid to be created is stored in a format such as a boundary representation model, and the specific uses of the data stored in each associated storage unit are as follows.

(i) Two-dimensional attached data storage unit Data such as two-dimensional drawings, perspective drawings, annotation characters, dimension lines, etc. of the created solid model are stored.

The solid model creation/editing processing unit 14 provides a function of storing drawing information of solids and surfaces subjected to hidden line processing, which the user may freely use, in this two-dimensional auxiliary data storage unit.

(ii) The content of creating the three-dimensional attached data storage unit is left to the application of the application processing unit 13. For example, information such as NC cutter paths, node information used in the finite element method, wire data used in mechanism analysis, and objects used in robot simulation can be stored. The solid model creation/editing processing unit 14 provides an interface for reading and writing data to this unit. The following uses are possible.

+a+ Copy the solid main data to the 3D attached data storage unit.

(Using the bl shape, the application processing unit 1
3 generates the NC cutter path as three-dimensional attached data.

(Editing is performed within the C1 three-dimensional attached data using the functions provided by the 5 solid model creation/editing processing unit 14.

Note that the functions provided by the solid model creation/editing processing unit 14 are the same as the data creation/editing functions conventionally provided to the shape data storage unit 18 (in addition to the functions provided in this embodiment, A data copy function between units is also provided. In the copy processing procedure, target data is transferred to a new unit or a designated unit by tracing from the attached data pointer table 19.

(iii) What is the depth of the three-dimensional plane data storage unit and the two-dimensional plane data storage unit?

Can be set freely. Using this data, a function is provided to display data as shown in FIG. 4 on the display screen of the display device 11 shown in FIG. 1. In the example shown in Figure 4, three screens are divided into four.

The three-dimensional shape of the solid model is displayed at the top left.

At the top right, a plan view of the created solid obtained from the three-dimensional plane data storage unit 22, at the bottom left.

A side view of the created solid is shown, and a front view of the created solid is shown at the bottom right. In this way, data from multiple units can be displayed simultaneously. There is no need to explain the processing procedures related to the display processing.

A specific usage example of such attached data will be explained with reference to FIG.

If a drawing of the part you want to create exists, use it to create a solid model in a first-order manner.

+al Three views of existing drawings (plan, front, side, etc.)
are respectively stored in the three-dimensional plane data storage unit 22. For example, assume that the XY plane, YZ plane, and zX plane are three-dimensional branes.

fbl Split the screen and display the three-view diagram and the main shape data that you want to create.

(Edit the solid model by hitting the wires in the C1 three-dimensional plane. At this time, work by freely changing the depth.

as a command for this operation.

For example, there is a 5WEEP command for creating an object by raising a closed wire row to a specified height, and a command for joining two surfaces. These commands are the same as the conventional commands provided for creating and editing nine main data. Also.

Commands are provided to vary the depth. The operation is as follows.

(Use the al S W E E P command to hint at the wires marked ■ to ■ on the outer frame of the plan view shown in Figure 5, and then hit the wire 〇 in the side view to determine the secondary height. , generate the larger platform.

佽) Change the depth relative to the plan view to a using the depth change command.

(Using the CI S W E E P command, hit the wires ○ to ■ on the plan view to determine the height.

Hit the wire ■ in the side view.

(dl Use the command to join surfaces to join large and small platforms.

With commands that change the depth like this.

It becomes possible to create parts using existing drawings.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to unifiedly manage the attached data necessary for designing and manufacturing solid models together with the shape data, and it is possible to manage them in a unified manner, such as analysis such as finite element method and numerical control. It will be possible to handle 3D data in relation to the target solid model.

Furthermore, the area for storing data used by application programs and the like can be centrally managed, and the processing load on the application programs and the like can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention. FIG. 2 is a conceptual diagram of the data structure according to the present invention. FIG. 3 is an example of model creation/editing processing according to an embodiment of the present invention. FIG. 4 is a usage example of a screen according to an embodiment of the present invention. FIG. 5 shows an example of the use of attached data according to an embodiment of the present invention. In the figure, 10 is a processing device, 11 is a display device, 12 is an input device, 13 is an application processing section, 14 is a solid model creation/editing processing section, 15 is a solid model data section, 16 is a solid main data section, 17 is the attached data section,
18 is a shape data storage unit, and 19 is an attached data pointer table. 20 is a two-dimensional attached data storage unit), 21 is a three-dimensional attached data storage unit, 22 is a three-dimensional plane data storage unit, 23 is an external storage access control unit, and 24 is an external storage device.

Claims (1)

[Claims] In a solid CAD system that handles the three-dimensional shape of an object as a solid model and has creation and editing processing functions for the solid model, shape data in which shape data regarding the solid model is stored for each solid model. a storage unit (18); a two-dimensional ancillary data storage unit (20) in which two-dimensional ancillary data including two-dimensional drawings and character data regarding the solid model are stored; and three-dimensional ancillary data used by the application regarding the solid model. a three-dimensional attached data storage unit (21) in which the solid model is stored; a three-dimensional plane data storage unit (22) in which figure data on a plane in the three-dimensional space in which the solid model is placed is stored; an attached data pointer table (19) having address information for each of the data storage unit, the three-dimensional attached data storage unit, and the three-dimensional plane data storage unit, and the two-dimensional attached data storage unit and the three-dimensional attached data storage unit. A solid CAD system comprising: a data storage unit; and creation and editing processing means (13, 14) for data stored in the three-dimensional plane data storage unit.