JPH0973472A - Designing device and describing method for its annotation text - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a designing device which represents annotations to the heights of planes constituting a body shape on a design drawing and the shapes of curved surfaces, and the describing method for its annotation texts. SOLUTION: Planes of interest are taken out of three-dimensional data on a previously generated component in order and it is decided whether each plane is a visible border surface on a two-dimensional drawing. When the plane is the visible surface, the kind of the shape of the surface is classified by shapes which can be represented on a trihedral drawing of the height of a horizontal plane, an oblique plane, a cylindrical plane, a spherical plane, and a plane of rotation, and an annotation based upon each plane kind is generated and entered as three-dimensional data into a closed area on the two-dimensional figure corresponding to the plane of interest. The representation 33 of the plane height and the representation 34 of a slope are added to a front view 31 and a side view 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a design device including a CAD / CAM device, and more particularly to a design device suitable for use in designing and processing a mold.

[0002]

2. Description of the Related Art In drawings used for designing and processing a mold, a height of a surface forming a part in a plan view, which is a center of three views of a part molded by the mold, is shown. As a simple expression, a method is used in which the height of each surface is also written on each surface constituting the plan view with annotations using letters or numbers. This method has the effect of reducing the design man-hour as compared with the case of drawing a fine shape by the so-called trigonometric method. Further, there is an advantage that the entire shape of the component can be quickly understood only by looking at the plan view. The notation of letters and numbers on this floor plan is 2
When the NC processing data of the three-dimensional shape is created by using the design data in the three-dimensional design device, it is used as the data for creating the automatic processing NC data of 2.5D, that is, 21/2 shapes. .

[0003]

However, in the above-mentioned conventional example, in the two-dimensional design apparatus, there is no three-dimensional association between the plan view and the side view of the part to be created, and when the design drawing is created, The operator is writing the annotations. For this reason, the ratio of the number of man-hours for entering the above-mentioned notation in the work of creating the design drawing becomes a serious problem. In addition, a secondary obstacle is that a mold is manufactured without finding an entry error, and a defect occurs during manufacturing of a component, which is a secondary obstacle.

In recent years, with the development of a three-dimensional design apparatus, three-dimensional drawings are created by a predetermined procedure from a three-dimensional model, and improvement in design efficiency is being realized. Since the entry of the height notation is still performed by the operator, there is a problem that the design man-hour is increased and the erroneous writing error occurs.

Therefore, an object of the present invention is to provide a designing device capable of notating the height of a surface constituting an object shape on a design drawing and an annotation of the shape of a curved surface, and a method of describing the annotation text.

[0006]

As a configuration of the present invention for achieving the above object, the designing device has the following features.

That is, 3 for generating a three-dimensional figure of an object
A two-dimensional shape generation means and a two-dimensional figure of the object 2
In a design device including a three-dimensional shape generation means, a storage means for storing annotation text representing the shape of the object and shape attribute information, an extraction means for extracting the surface shape of the three-dimensional figure, and the extracted surface. Annotation text conversion means for converting a shape into annotation text based on the storage means, and an annotation for adding the converted annotation text to a closed region forming the two-dimensional figure corresponding to the extracted surface shape. It is characterized in that a text appendix means is provided.

[0008] The three-dimensional figure is developed into a two-dimensional three-view drawing, and the surface forming the shape of the part that cannot be represented is represented by text data of characters and numbers.

Further, the extracting means extracts a closed area of a horizontal plane in the surface shape of the three-dimensional figure, and the annotation text adding means adds the height of the closed area of the horizontal plane.

Further, the extracting means extracts a closed region of a slope in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the slope.

Further, the extraction means extracts a closed region of a cylindrical surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the cylindrical surface.

Further, the extracting means extracts a closed area of a spherical surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the spherical surface.

Further, the extraction means extracts a closed region of a rotation surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds the annotation text representing the rotation surface.

As a result, the height of the horizontal plane, the slope, the cylindrical surface, the spherical surface, and the shape of the rotating surface of the component, which cannot be represented by the two-dimensional figure, are represented by the text data of characters and numbers.

As a configuration of the present invention for achieving the same object, the description method of the annotation text of the designing device has the following features.

That is, in the method of generating a three-dimensional figure of an object and describing the annotation text of a designing apparatus for generating the two-dimensional figure of the object, a storage step of storing the annotation text representing the shape of the object and shape attribute information. An extraction step of extracting the surface shape of the three-dimensional figure, an annotation text conversion step of converting the extracted surface shape into annotation text based on the storage step, and the converted annotation text, It is characterized by further comprising an annotation text adding step of adding a closed area forming the two-dimensional figure corresponding to the extracted surface shape.

The three-dimensional figure is developed into a two-dimensional three-dimensional view, and the surface forming the shape of the part that cannot be represented is represented by text data of characters and numbers.

Further, in the extracting step, a closed area of a horizontal plane in the surface shape of the three-dimensional figure is extracted, and in the annotation text adding step, the height of the closed area of the horizontal plane is added.

Further, the extracting step extracts a closed region of a slope in the surface shape of the three-dimensional figure, and the annotation text adding step adds an annotation text representing the slope.

Further, the extraction step extracts a closed region of a cylindrical surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds an annotation text representing the cylindrical surface.

Further, the extraction step extracts a closed area of a spherical surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds an annotation text representing the spherical surface.

Further, the extracting step extracts a closed region of a rotating surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds annotation text representing the rotating surface.

As a result, the height of the horizontal plane, the slope, the cylindrical surface, the spherical surface, and the shape of the rotating surface of the component, which cannot be represented by the two-dimensional figure, are represented by the text data of characters and numbers.

[0024]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

First, a CAD / CAM device to which the present invention is applied will be described with reference to FIG.

FIG. 1 is a CAD / CAM to which the present invention is applied.
It is a block configuration diagram showing an outline of an apparatus.

In the figure, 10 is a CAD / CAM device,
An NC data creation device 20 is connected via a communication interface 9 which is a communication means, and various kinds of mutual data communication are possible. Further, an NC machine tool 21 is connected to the NC data creation device 20 by a communication means (not shown). The CAD / CAM device 10 is an NC for the workpiece.
CPU 1 for generating CAD data that is the basis of data generation, and for generating text data (hereinafter referred to as annotation notation) that is characters and numbers annotating the shape of a surface on a drawing, and a keyboard for inputting data and parameters. Used as an input device 2 such as a display device, a display device 3 such as a CRT for displaying data and parameters, an output device 4 such as a printer, a ROM 6 storing fixed parameters and programs, a temporary storage of variable parameters and a working area. RAM
7, a storage device 8 such as a hard disk drive or a floppy disk drive, and the communication interface 9 described above, and are communicably connected by a bus 5 for internal communication.

Next, the schematic structure of the memory map of the main memory in the CPU 1 will be described.

FIG. 2 shows a CP as an embodiment of the present invention.
It is a figure which shows the memory map of the main memory of U1.

In the figure, reference numeral 11 is a control program for generating CAD data, annotation notation, etc., 12 is three-dimensional data of pre-generated parts, and 13 is two-dimensionally expanded three-dimensional data of pre-generated parts. Plan view data, 14 is an annotation notation text table created when the annotation notation is created, 15 is an annotation notation position table created when calculating the entry position of the annotation notation, 16 is an annotation notation group dictionary that defines the expression of the annotation notation It's a table.

Next, the annotation notation generation process will be described with reference to the flowchart of FIG.

FIG. 3 is a flowchart of the annotation notation generation processing according to the embodiment of the present invention.

In the figure, in step S1, three-dimensional data 1
The predetermined dimensional standard set by 2 is taken out and held as a standard value of the coordinate calculation in the annotation notation creating process performed thereafter. In step S2, the surface of interest is sequentially extracted from the three-dimensional data 12. In step S3, it is determined whether or not the surface extracted in step S2 corresponds to a boundary element visible when projected onto the plan view which is the annotation notation target. If it is a visible surface, in step S4 the type of surface shape is classified into a shape that can be expressed as a representation on a three-view drawing of a plane, a slope, a cylindrical surface, a spherical surface, and a rotating surface, and in step S5 each Create annotation notation according to the surface type. In step S6, the entry position of the annotation notation on the plan view is determined. In step S7, step S
In step 5 and step S6, the annotation notation text determined in step S6 is written on the target surface (or the arrow indicating the surface is also entered) that is the entry position of the annotation notation on the three-view drawing. In step S8, it is determined whether or not the extraction of the surface from the three-dimensional data is completed, and if it is not completed, the process proceeds to step S2 to continue the process. If completed, the annotation notation generation process ends. The three-view drawing with the annotation notation can be printed by the output device 4. Further, it is passed as input data to the NC data creating device 20 and used for creating the processed data. N obtained
The C data is downloaded to the NC machine tool 21 and used.

An example of processing of the above annotation notation is shown in FIGS. 4 and 5.

FIG. 4 is a perspective view of a part in the state of three-dimensional CAD data as one embodiment of the present invention.

FIG. 5 is a diagram showing a three-view drawing of a part to which annotations are added as an embodiment of the present invention.

In FIG. 5, the parts in the state of the three-dimensional CAD data of FIG. 4 are developed into two-dimensional data and a front view 3
1 shows a state in which the annotation notation according to the present invention is added when the side view 32 is obtained. An annotation notation 33 for the surface height and an annotation notation 34 for the slope A1 are added (however, A1 is an example of a symbol indicating a slope). It goes without saying that the number in the frame of the annotation notation 33 indicates the height of the surface. In addition, the dimensional reference 35 necessary for the annotation processing is also entered.

Note that the annotation notation for the cylindrical surface, the spherical surface, and the rotating surface conforms to the annotation notation 34 for the slope A1 when developed into two-dimensional data, and therefore the description of the individual drawings will be omitted.

Furthermore, the present invention may be applied to a system composed of a plurality of devices or to an apparatus composed of a single device as in this embodiment. Further, it goes without saying that the present invention can be applied to the case where it is implemented by supplying a program to a system or an apparatus. In this case, the storage medium storing the program according to the present invention constitutes the present invention. Then, by reading the program from the storage medium to the system or device, the system or device operates in a predetermined manner.

<Effects of the Embodiment> (1) When the three-dimensional information of a part included in the three-dimensional CAD data is expanded to a plan view, the surface shape of the part that is difficult to grasp at first glance is displayed on the surface by letters or numbers. By expressing it as text data, the design time of parts can be significantly reduced, and
It is possible to prevent a secondary trouble from occurring due to an entry error. (2) When developed in a plan view, the size reference 35 is added to assist in intuitively grasping the size even in a two-dimensional representation.

[0041]

As described above, according to the present invention, there are provided a design apparatus capable of notating the height of a surface forming an object shape on a design drawing and an annotation of the shape of a curved surface, and a method of describing the annotation text. Offer is realized.

[0042]

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a CAD / CAM device to which the present invention is applied.

FIG. 2 is a diagram showing a memory map of a main memory of a CPU 1 according to an embodiment of the present invention.

FIG. 3 is a flowchart of annotation notation generation processing according to an embodiment of the present invention.

FIG. 4 is a perspective view of a part in the state of three-dimensional CAD data as one embodiment of the present invention.

FIG. 5 is a diagram showing a three-view drawing of a component to which annotations are added as an embodiment of the present invention.

[Explanation of symbols]

 1 CPU 2 Input device 3 Display device 4 Output device 5 Bus 6 ROM 7 RAM 8 Storage device 9 Communication interface 10 CAD / CAM device 11 Control program 12 Three-dimensional data 13 Three-sided view data 14 Annotation text table 15 Annotation position table 16 Annotation group dictionary table 20 NC data creation device 21 NC machine tool 31 Front view 32 Side view 33 Surface height annotation notation 34 Slope annotation notation 35 Dimensional standard

Claims (12)

[Claims] 1. An annotation text representing the shape of an object, in a designing device comprising a three-dimensional shape generating means for generating a three-dimensional figure of an object and a two-dimensional shape generating means for generating a two-dimensional figure of the object. And storage means for storing shape attribute information, extraction means for extracting the surface shape of the three-dimensional figure, and annotation text conversion means for converting the extracted surface shape into annotation text based on the storage means. A designing device comprising an annotation text appending means for appending the converted annotation text to a closed area forming the two-dimensional figure corresponding to the extracted surface shape. 2. The extracting means extracts a closed area of a horizontal plane in the surface shape of the three-dimensional figure, and the annotation text adding means adds the height of the closed area of the horizontal plane. 1. The design device according to 1. 3. The extraction means extracts a closed region of a slope in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the slope. Design equipment. 4. The extracting means extracts a closed region of a cylindrical surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the cylindrical surface. Design device described. 5. The extraction means extracts a closed region of a spherical surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds an annotation text representing the spherical surface. Design equipment. 6. The extracting means extracts a closed region of a rotation surface in the surface shape of the three-dimensional figure, and the annotation text adding means adds annotation text representing the rotation surface. Design device described. 7. A three-dimensional figure of an object is generated and the two
A description method of an annotation text of a design device for generating a three-dimensional figure, comprising: a storage step of storing the annotation text representing the shape of the object and shape attribute information; an extraction step of extracting the surface shape of the three-dimensional figure; An annotation text converting step of converting the extracted surface shape into annotation text based on the storing step, and converting the converted annotation text into a closed region forming the two-dimensional figure corresponding to the extracted surface shape. A description method of an annotation text of a design device, comprising an annotation text appending step. 8. The extraction step extracts a horizontal closed area in the surface shape of the three-dimensional figure, and the annotation text adding step adds the height of the closed area of the horizontal surface. 7. A description method of the annotation text of the design device described in 7. 9. The method according to claim 7, wherein the extracting step extracts a closed region of a slope in the surface shape of the three-dimensional figure, and the annotation text adding step adds annotation text representing the slope. A description method for annotation text of design equipment. 10. The extraction step extracts a closed region of a cylindrical surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds annotation text representing the cylindrical surface. A description method of the annotation text of the described design device. 11. The method according to claim 7, wherein the extracting step extracts a closed region of a spherical surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds annotation text representing the spherical surface. A description method for annotation text of design equipment. 12. The extracting step extracts a closed region of a rotating surface in the surface shape of the three-dimensional figure, and the annotation text adding step adds annotation text representing the rotating surface. A description method of the annotation text of the described design device.