JP3421082B2 - CAD system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD system in which design is supported by a computer, and more particularly to a CAD system suitable for supporting machine design.

[0002]

2. Description of the Related Art Generally, a conventional two-dimensional CAD system does not manage each projection drawing created by a designer (user), and the management between them is left to the user.
Therefore, all required projection views have been created through the work of the user. In addition, when a certain projection view, such as a front view, is modified, the user needs to find a modified portion of another projection view, such as a side view or front view, which is affected by the modification, and perform the modification work. was there.

Therefore, it has been an indispensable task to examine whether or not what is expressed by each projection drawing, which is a two-dimensional drawing, correctly represents a product. When carrying out such a study work, it is effective to present the user with a three-dimensional representation, which is a three-dimensional representation. Therefore, in order to support design work including such examination work, a two-dimensional and three-dimensional integrated CA that handles two-dimensional drawings and three-dimensional drawings in an integrated manner.
The D system is being considered. 2D / 3D integrated C
As an AD system, for example, Japanese Patent Laid-Open No. 3-105568
There is one disclosed in the publication.

FIG. 33 is a flow chart showing the flow of design work by the CAD system described in the above publication. The CAD system described in the above publication simultaneously displays two-dimensional drawings and three-dimensional stereoscopic views defined corresponding to those drawings on one screen using different windows. is there. Therefore, the user can verify each two-dimensional drawing while looking at the stereoscopic view displayed on the same screen.

Next, the operation will be described. At the time of design work, the user first creates a two-dimensional plan drawing (main projection drawing such as a front view) by the CAD system (step ST331). Then, 3 of front view, plan view and elevation view
Create a two-dimensional plan drawing by floor plan (step ST33)
2). Then, if necessary, the three-dimensional study drawing of the three-dimensional drawing is referred to (step ST333), and the two-dimensional three-view drawing is studied. In this CAD system, the three-dimensional view is defined in advance in association with the two-dimensional three-view, and is displayed on the same screen as the display screen of the three-view.

The user looks at the stereoscopic view displayed on the same screen and corrects the three-view drawing if necessary. When the examination of the three-view drawing is completed, the parts that make up the three-view drawing are developed into a two-dimensional part drawing (step S
(T334), and a two-dimensional assembly drawing is created (step ST335).

Japanese Unexamined Patent Publication No. 4-111106 discloses a CAD system capable of editing three-dimensional drawing data in synchronism with the operation of two-dimensional drawing data by further integrating two-dimensional drawings and three-dimensional drawings. There is one shown. Figure 3
FIG. 4 is an explanatory diagram showing how drawings are modified by the CAD system.

As shown in FIG. 34 (a), the user extends the figure 341 in the front view while the two-dimensional three-view drawing and the three-dimensional stereoscopic view (three-dimensional view) are displayed. Is input to the CAD system, the CAD system displays a stretched graphic 344 in the front view, as shown in FIG. Of course, the internal data corresponding to the front view is also updated.

At the same time, the CAD system also updates the stereogram. Then, in accordance with the update, the right side view is also updated. In this way, the graphic 342 is automatically updated to the graphic 345, and the graphic 343 is automatically updated to the graphic 346.

As described above, when the user edits a two-dimensional projected view, the CAD system searches the internal data for the ridge of the three-dimensional solid corresponding to the two-dimensional element to be edited, Edit 3D drawings. In addition, a two-dimensional element of another projection view corresponding to the ridgeline of the three-dimensional solid in the edited three-dimensional view is searched from the internal data, and the data is automatically edited and changed.

[0011]

Since the conventional CAD systems are constructed as described above, the contradictions between the projected views are remarkably reduced by the CAD systems. However, in those CAD systems, geometrical shape elements such as two-dimensional points and line segments and three-dimensional solid ridges are associated between two-dimensional drawing data and three-dimensional drawing data. Only. Therefore, it does not support the drawing rules such as the drawing symbols that appear in the drawing drawings that are finally required in the design work and the graphic representations specific to the drawing drawings, and does not support the creation and editing of drawing drawings that integrate 2D and 3D. There was a problem that it could not be done.

The present invention has been made in order to solve the above-mentioned problems, and provides a drawing rule that generally uses the mutual relation between the graphic elements of a two-dimensional drawing and the graphic elements of a three-dimensional product. By including and interpreting, efficiently generating a three-dimensional product model from a projection drawing at the stage of a two-dimensional plan, and automatically generating each projection drawing such as a front view, a plan view, and a side view from the product model, It is an object of the present invention to provide a CAD system that allows an operator to perform creation and editing work with the same operation feeling as drawing creation that is generally performed . Further, at that time, it is an object to obtain a CAD system which infers the user's intention and generates a product model and each projection drawing according to the user's intention.

[0013]

A CAD system according to the invention described in claim 1 creates a product model from a two-dimensional figure and creates each projection of the product model.
In the D system, a drawing rule relating to a two-dimensional drawing showing a predetermined drawing symbol such as an official standard or a graphic expression peculiar to the drawing drawing, and a three-dimensional expression expressed from a two-dimensional figure or a symbol drawn based on each drawing rule A drawing rule data storage unit that holds drawing rule data for associating a figure with each other, and a drawing process for creating each projection drawing of the product model using the drawing rule data from a product model having a three-dimensional solid shape and attributes And a section.

[0014] CAD system according to the second aspect of the present invention, as well as to create a product model from a two-dimensional shapes,
In a CAD system that creates each projection drawing of a product model, a drawing rule relating to a two-dimensional drawing showing a predetermined drawing symbol such as an official standard or a graphic expression peculiar to the drawing drawing, and a two-dimensional figure drawn based on this drawing rule Drafting rule data storage that holds drafting rule data that associates 3D figures represented by symbols and symbols, a drawing data processing unit that creates or edits a two-dimensional drawing according to instructions from the user interface, and this drawing data processing unit 3 from the 2D drawing created or edited by
A product model construction processing unit that creates or edits a product model having a three-dimensional shape and attributes, a mutual interpretation data storage unit that stores a correspondence relationship between a two-dimensional drawing and the corresponding product model, and a product model Each drawing drawing based on the drawing rule is created using the drawing drawing rule data, the correspondence between the created drawing drawing and the product model is registered in the mutual interpretation data storage unit, and the drawing data processing unit When at least one projection drawing is edited by, the two-dimensional drawing is known from the mutual interpretation data storage unit and another drawing drawing of the product model corresponding to the two-dimensional drawing is created using the drawing rule data. And a drawing processing unit.

In the CAD system according to the third aspect of the present invention, when the drawing processing unit edits the two-dimensional drawing and the cross-section designating symbol is given to the two-dimensional drawing by the user interface, the drawing rule data storage The two-dimensional drawing showing the cross-sectional shape of the product model corresponding to the two-dimensional drawing is generated by recognizing the cross-section instruction symbol as a cutting instruction of the product model based on the drawing rule data in the section.

A CAD system according to a fourth aspect of the present invention includes an operation intention inference processing unit that estimates an operation intention of the user through a user interface when editing a two-dimensional drawing, and the product model construction processing unit causes the operation intention inference processing unit to execute the operation intention. The product model is created and edited according to the estimation result of the inference processing unit.

In the CAD system according to the fifth aspect of the present invention, when the product model construction processing unit creates a product model corresponding to a two-dimensional drawing, the operation history of the processing contents is stored in the product model data storage unit. , The operation intention inference processing unit
The saving of the operation history is registered in the mutual interpretation data storage unit, and when the two-dimensional drawing is newly edited,
When the registered contents of the operation history storage related to the three-dimensional drawing are confirmed from the mutual interpretation data storage unit, the product model construction processing unit is edited based on the stored operation history.
The original product model corresponding to the dimensional drawing is corrected.

In a CAD system according to a sixth aspect of the present invention, the operation intention inference processing unit performs a process of contacting a plurality of two-dimensional figures performed by a user interface with a plurality of three-dimensional parts corresponding to the two-dimensional figures. The product model construction processing unit determines that the shape is to be joined, and joins the plurality of three-dimensional partial shapes prepared in advance to generate one product model in accordance with the determination of the joining processing.

In the CAD system according to the seventh aspect of the present invention, when the operation intention inference processing unit moves a line segment element which is a constituent element of a two-dimensional figure from the user interface, the line segment element is moved. Of the new line segment element for recognizing the gap created by the above, and determining the generation of a new line segment element for filling the gap, and the drawing data processing unit, according to the determination of the operation intention inference processing unit, a new line for filling the gap. A new two-dimensional figure is generated by adding a division element.

In the CAD system according to the eighth aspect of the present invention, the product model construction processing section corresponds to the new two-dimensional figure generated by adding a new line segment element for filling the gap. Is corrected, and the drawing processing unit creates each projection drawing from the corrected product model.

In the CAD system according to the ninth aspect of the present invention, the operation intention inference processing unit produces a production operation history for each three-dimensional partial shape of the product model when the product model construction processing unit produces the product model. When a component of a two-dimensional drawing is selected by the drawing data processing unit after being saved in the model data storage unit, the product model construction processing unit edits it based on the product model generation operation history corresponding to the selected component. The range of the three-dimensional partial shape is defined.

In the CAD system according to the tenth aspect of the present invention, the product model construction processing unit corrects the three-dimensional partial shape in the product model based on the defined range of the three-dimensional partial shape to be edited, The drawing processing unit creates each projection drawing of the product model in which the three-dimensional partial shape is corrected.

In the CAD system according to the eleventh aspect of the present invention, when the operation intention inference processing unit corrects a component on the two-dimensional drawing, the operation intention inference processing unit corresponds to the component which is the target of the correction. Recognizing the surrounding conditions such as the connection conditions between the three-dimensional partial shape and the surrounding shapes of the three-dimensional partial shape
The product model construction processing unit corrects the three-dimensional partial shape that matches the recognized surrounding condition to generate a product model.

In the CAD system according to the twelfth aspect of the present invention, the operation intention inference processing unit, when generating the product model,
The generation process by the user operation for the three-dimensional partial shape configuring the product model is stored in the product model data storage unit as a generation operation history, and when the correction operation of the component on the two-dimensional drawing is performed, the correction operation is performed. The three-dimensional partial shape corresponding to the target component and the dependency of the three-dimensional partial shape on the peripheral shape are detected from the generation operation history, and the product model construction processing unit determines the dependency on the detected peripheral shape. The product model is generated by correcting the matching three-dimensional partial shape.

In the CAD system according to the thirteenth aspect of the present invention, the operation intention inference processing unit, when generating the product model,
A process of a user operation on a three-dimensional partial shape forming the product model is stored in the product model data storage unit as a generation operation history, and when a copy operation of a component on a two-dimensional drawing is performed, the component is added to the component. The generation operation history of the corresponding three-dimensional partial shape is set to be shared by the new generation operation history of the three-dimensional partial shape corresponding to the new component generated by copying, and the product model construction processing unit If a product model having a three-dimensional partial shape corresponding to a different component is generated and a correction operation is performed on one of the original component and the new component on the two-dimensional drawing, the new model is added. Based on the generation operation history, a common correction is made to each corresponding three-dimensional partial shape to generate a new product model.

[0026]

[Action] drawings processing unit in the first aspect of the present invention,
A projection drawing according to a drawing symbol is created from a product model to provide a projection drawing that is easy for a user to understand.

A CAD system according to a second aspect of the present invention has the functions of the CAD system according to the first aspect ,
It provides an environment for users to create a three-dimensional product model in the same way as a normal drawing creation, and when a projection drawing is edited, the product model corresponding to the projection drawing is automatically used for the three-view drawing, etc. Each projection drawing is created and the user is not conscious of the relationship between the projection drawings, and is freed from the work of additionally editing other projection drawings.

The drawing processing unit according to the third aspect of the present invention automatically generates a cross-sectional figure in accordance with the input cross-section designating symbol, and makes it unnecessary for the user to predict and draw the cross-sectional view.

The operation intention inference processing unit in the invention according to claim 4 estimates a new operation target from the operation intention of the past operation and reflects the user's intention hidden in each graphic element. Allows building of product models.

The operation intention inference processing section in the fifth aspect of the present invention reflects the operation history of the user saved when the product model construction processing section creates the product model in the newly generated operation and attaches it to the new operation. It eliminates the need for graphic operations.

According to the sixth aspect of the invention, the operation intention inference processing section recognizes the joining of the three-dimensional partial figures according to the placement operation of the two-dimensional figure on any of the projection planes, and facilitates the user's shape combination work. Provide an environment for

The graphic data processing unit in the invention according to claim 7 automatically compensates for the discontinuity between the graphics that occurs when the graphics are partially moved, and when the graphics representing the contour of the product are changed. , No need for additional editing work after change operation.

The product model construction processing unit in the invention of claim 8 constructs a product model according to the automatic gap compensation processing by the CAD system according to the invention of claim 7 ,
Since the drawing processing unit updates the projection drawing based on the product model subjected to the automatic gap compensation processing, it provides a consistent projection drawing for all projection planes.

The operation intention inference processing unit in the invention according to claim 9 determines the extraction range based on the generation operation history reflecting the user's intention, and the user can easily and easily perform the processing target. Allows you to make your choice.

The operation intention inference processing section in the tenth aspect of the invention operates similarly to the operation intention inference processing section in the ninth aspect of the invention to determine the correction range on the three-dimensional drawing. Then, the product model construction processing unit corrects the product model based on the correction range, and the drawing processing unit automatically creates each projection drawing, and makes corrections such as movement and copying consistent with respect to all projection drawings. To be realized.

According to the eleventh aspect of the invention, the product model construction processing unit automatically adjusts the target shape according to the surrounding condition of the processing target detected by the operation intention inference processing unit to correct the product model. Is unnecessary.

According to the twelfth aspect of the present invention, the product model construction processing section automatically adjusts the target shape according to the degree of dependence on the peripheral shape of the processing target detected by the operation intention inference processing section to correct the product model. , No need for shape adjustment by the user.

According to the thirteenth aspect of the present invention, the operation intention inference processing section shares a part or the whole of the generated operation history between the copy source shape and the copy destination shape, thereby making both of them 1
It is possible to treat them as one logical group, and it is possible to perform the shape correction that occurs later without omission.

[0039]

EXAMPLES Example 1. Embodiments of the present invention will be described below with reference to the drawings. Figure 1
It is a system configuration diagram showing a configuration of a CAD system according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a two-dimensional drawing or 3
It is a user interface which presents a dimensional drawing.

Reference numeral 2 denotes an input interpreting unit that interprets the content of the user's command and activates a predetermined processing unit, and 3 is activated by the input interpreting unit 2 to construct a product model represented by a three-dimensional drawing. It is a processing unit. Reference numeral 4 is a drawing rule data storage section, which is represented by drawing rules such as drawing symbols and notations based on official standards such as JIS and ISO, and two-dimensional figures and symbols drawn based on each drawing rule. The drawing rule data for associating with the three-dimensional figure is stored.

Reference numeral 7 is a product model data storage unit that stores data indicating the product model created by the product model construction processing unit 3, 8 is a drawing data processing unit that is activated by the input interpretation unit 2, and creates a two-dimensional drawing, and 9 is It is a drawing data storage unit for storing the drawing data created by the drawing data processing unit 8.
The input interpreter 2, the product model construction processor 3, and the drawing data processor 8 are realized by a CPU such as a workstation and a program. The user interface 1 is realized by an input unit such as a workstation and a display unit. The product model data storage unit 7 and the drawing data storage unit 9 are realized by a storage device such as a workstation or an auxiliary storage device.

[0042] Next, the operation will be described. A command input from the user via the user interface 1 is interpreted by the input interpretation unit 2. The input interpreting unit 2 activates the drawing data processing unit 8 when it determines that the command is related to the creation of a two-dimensional drawing. Then, the drawing data processing unit 8 creates a two-dimensional drawing in an interactive form with the user, and the drawing data of the created two-dimensional drawing is stored in the drawing data storage unit 9
To store.

The input interpreting section 2 activates the product model construction processing section 3 when it judges that the command is related to the production of the product model. When the command relates to generation of a product model, the product model construction processing unit 3 inputs data and commands that are subsequently input, drafting rule data in the drafting rule data storage unit 4, and drawing data in the drawing data storage unit 9. Etc. to create a product model. Then, the product model data corresponding to the product model is stored in the product model data storage unit 7. The case of creating a product model from this two-dimensional drawing is shown in FIG. 2 and Examples 2 to 4 described later.
Explained in.

The product model construction processing section 3 reads out the corresponding product model data from the product model data storage section 7 when the command relates to editing of the product model. Then, the edited product model data is stored in the product model data storage unit 7.

FIG . 2 is an explanatory diagram for explaining the processing of the product model construction processing section 3. It is assumed that the drawing data processing unit 8 creates a drawing of a two-dimensional drawing including the graphic 21 as shown in FIG. 2, and the drawing data is stored in the drawing data storage unit 9. It is assumed that the user inputs a command requesting generation of a product model by giving attributes such as thickness information and through holes to the drawing data (two-dimensional drawing). Then, the product model construction processing unit 3 creates a product model such as the graphic 22 by referring to the drawing rule data for these attributes. Then, the product model data indicating the product model is stored in the product model data storage unit 7.

[0046] Example 2. FIG. 3 relates to an embodiment of the invention of claim 1 and relates to the second embodiment of the invention.
It is explanatory drawing which shows the relationship between the product model and the two-dimensional figure by the drawing symbol regarding the shape which concerns on an Example. Example 1 above
2 described above, the product model construction processing unit 3 explained the example of creating the product model based on the attribute data or the like input by the user. However, referring to the drawing rule data in the drawing rule data storage unit 4, the product model construction processing unit 3 refers to the product. You can also create a model. For example, as shown in the left side of FIG. 3A, it is assumed that a figure including a semi-ring figure and a drawing symbol indicating a gear is created as a two-dimensional drawing. When the user inputs a command indicating the generation of the product model, the input interpretation unit 2 activates the product model construction processing unit 3.

At this time, the product model construction processing unit 3
When a drawing rule indicating a gear is found in the drawing data of the dimensional drawing, the drawing rule data in the drawing rule data storage unit 4 is searched. Then, using the gear library in the drawing rule data, a three-dimensional product model conforming to the actual gear shape is created as shown on the right side of FIG. In the gear library, the drawing rules of gears and the data indicating the actual shape are associated and registered. The product model construction processing unit 3 stores the product model data indicating the created product model,
It is stored in the product model data storage unit 7 together with the data indicating that it is a gear.

When the drawing symbol indicating the spring as shown on the left side of FIG . 3B is in the two-dimensional drawing, the product model construction processing unit 3 causes the spring in the drawing rule data in the drawing rule data storage unit 4. Using the library, as shown in the right side of FIG. 3B, a three-dimensional product model conforming to the actual spring shape is created.

When the drawing symbol indicating the bearing as shown in the upper part of FIG . 3 (c) is present in the two-dimensional drawing, the product model construction processing unit 3 determines the bearing in the drawing rule data in the drawing rule data storage unit 4. Using the library, as shown in the lower side of FIG. 3 (c), a three-dimensional product model conforming to the actual bearing shape is created. In this case, a method of expressing a plurality of bearings in a two-dimensional drawing is allowed, but one product model can be associated with any expression.

The other drawing rules are processed in the same manner. That is, when the product model construction processing unit 3 detects that there is a drafting rule on the two-dimensional drawing, it searches the drafting rule data in the drafting rule data storage unit 4 to obtain the concept corresponding to the drafting rule. Then, a shape corresponding to the concept is generated.

[0051] Example 3. FIG. 4 relates to an embodiment of the invention of claim 1 and relates to the third embodiment of the invention.
It is explanatory drawing which shows the relationship between the two-dimensional figure and the product model by the drawing symbol regarding the dimension which concerns on an Example. The product model construction processing unit 3 can handle not only the drawing rule concerning the shape but also the drawing rule concerning the dimension. For example, in FIG.
(A) As shown on the left side, it is assumed that a figure including a rectangular figure and a dimension auxiliary symbol φ indicating a diameter is created as a two-dimensional drawing.

When the user inputs a command indicating the generation of the product model, the input interpreting unit 2 activates the product model construction processing unit 3. The product model construction processing unit 3 operates in the drawing data of the two-dimensional drawing. When the auxiliary dimension code φ indicating the diameter is found, the drafting rule data in the drafting rule data storage unit 4 is searched. It is registered in the drafting rule data that φ is a rule indicating a diameter. Therefore, the product model construction processing unit 3 uses the rule in the drafting rule data,
As shown in the right side of FIG. 4A, a cylindrical product model is created.

When the dimension auxiliary symbol t indicating the plate thickness as shown on the left side of FIG . 4 (b) is present in the two-dimensional drawing, the product model construction processing unit 3 causes the drafting rule in the drafting rule data storage unit 4 to execute the drafting rule. Using the rules for plate thickness in the data, Figure 4
(B) As shown on the right side, a product model having a thickness is created.

When the dimension auxiliary symbol sφ indicating the sphere diameter as shown on the left side of FIG . 4C is present in the two-dimensional drawing, the product model construction processing unit 3 causes the drawing rule in the drawing rule data storage unit 4 to execute the drawing rule. Using the rules for sphere diameter in the data,
(C) As shown on the right side, a product model having a thickness is created.

The other dimension auxiliary symbols are processed in the same manner. That is, when the product model construction processing unit 3 detects that there is a symbol on the two-dimensional drawing, it searches the drafting rule data in the drafting rule data storage unit 4 to obtain the concept corresponding to the symbol. Then, a shape corresponding to the concept is generated.

[0056] Example 4. FIG. 5 relates to an embodiment of the invention of claim 1 and relates to the fourth embodiment of the invention.
According to the drawing symbols for omission and repetition according to the embodiment 2
It is explanatory drawing which shows the relationship between a dimensional figure and a product model. The product model construction processing unit 3 can handle not only drawing rules and dimension auxiliary symbols for shapes but also symbols for omission and repetition. For example, as shown on the left side of FIG.
As a two-dimensional drawing, it is assumed that a figure including a figure in which the lower half is omitted and an ellipsis mark indicating that the target portion is omitted is created.

When the user inputs a command indicating the generation of the product model, the input interpreting unit 2 activates the product model construction processing unit 3. However, the product model construction processing unit 3 operates in the drawing data of the two-dimensional drawing. When the ellipsis symbol is found, the drafting rule data in the drafting rule data storage unit 4 is searched. The rule that the symbol is a symbol indicating that the target shape is omitted is registered in the drawing rule data.
Therefore, the product model construction processing unit 3 uses the rule in the drawing rule data to create a product model in which omitted parts are also expressed, as shown on the right side of FIG.

When a symbol indicating partial omission as shown in the upper part of FIG . 5B is present in the two-dimensional drawing, the product model construction processing unit 3 causes the drawing rule data storage unit 4 to draw a part in the drawing rule data. Using the rules for omission, FIG.
As shown in the lower part, create a product model that also expresses the omitted parts. In this case, the length of the omitted portion is specified by the user or loaded from the drawing data storage unit 9.

When a symbol indicating repetition as shown on the left side of FIG . 5C is present in the two-dimensional drawing, the product model construction processing unit 3 relates to repetition in the drawing rule data in the drawing rule data storage unit 4. Using the rules, Figure 5 (c)
As shown on the right, create a product model that also expresses abbreviations. In this case, the product model construction processing unit 3 can obtain the entire shape by copying the non-abbreviated shape to the portion represented by the repeated symbol.

[0060] Example 5. Figure 6 is an example of a CAD system according to the first aspect of the invention is a system configuration diagram showing the configuration of a CAD system according to a fifth embodiment of the present invention. In the figure,
A drawing processing unit 6 creates a two-dimensional drawing from the product model data in the product model data storage unit 7. An operation example will be described with reference to FIGS.

[0061] Next, the operation will be described. A command input from the user via the user interface 1 is interpreted by the input interpretation unit 2. When the input interpretation unit 2 determines that the command is related to the production of the product model, the input interpretation unit 2 activates the product model construction processing unit 3. When the command relates to generation of a product model, the product model construction processing unit 3 creates a product model using data and commands that are subsequently input, drafting rule data in the drafting rule data storage unit 4, and the like. Then, the product model data corresponding to the product model is stored in the product model data storage unit 7.

The product model construction processing unit 3 reads out the corresponding product model data from the product model data storage unit 7 when the command is related to the editing of the product model. Then, the edited product model data is stored in the product model data storage unit 7.

When the input interpreting section 2 determines that the command is for creating a two-dimensional drawing, it activates the drawing processing section 6. The drawing processing unit 6 reads the corresponding product model data in the product model data storage unit 7. Then, a two-dimensional projection view (front view, plan view, side view) corresponding to the three-dimensional product model based on the product model data is generated.

In the product model data storage unit 7, for example,
Since each geometrical data (coordinates, angles, etc.) indicating each component of the three-dimensional product model is stored, the drawing processing unit 6 calculates each geometrical data indicating the three-dimensional shape from each geometrical data in the projection drawing. Get coordinates of drawing shape. Then, a projection drawing is created based on the obtained coordinates and the like.

[0065] Here, the drawing processing unit 6 refers to the drawing rule data for drawing rule data storage unit 4. Then, if the product model data includes data indicating the association with the drawing rule, the drawing rule corresponding to the data is retrieved from the drawing rule data storage unit 4. The drawing processing unit 6 reflects the extracted drawing rule on the projection drawing.

For example, assume that the product model data corresponds to the product model shown on the right side of FIG. Then, it is assumed that the product model data is accompanied by data indicating that it is a gear. Then, the drawing processing unit 6 obtains the drawing rule of the gear from the gear library in the drawing rule data in the drawing rule data storage unit 4. The drawing processing unit 6 does not generate a projection of the product model shown on the right side of FIG. 3A, but generates a projection drawing shown on the left side of FIG. 3A, according to the drawing rule. . Then, the drawing data corresponding to the projection drawing is stored in the drawing data storage unit 9.

When the product model data corresponds to the product model shown on the right side of FIG. 4 (a), the drawing processing section 6 generates, for example, a rectangular front view. At this time, since the product model has a cylindrical shape, a dimension auxiliary symbol indicating the diameter is searched from the drafting rule data in the drafting rule data storage unit 4. In the drafting rule data, it is registered that the dimension auxiliary symbol indicating the diameter is φ.

[0068] Accordingly, the drawings processing unit 6, to create a front view including a witness mark as shown in FIG. 4 (a) left. Then, the drawing data corresponding to the front view is stored in the drawing data storage unit 9. The drawing processing unit 6 can also generate a plan view and a side view. It can be seen from the product model data that the plane projection shape is a rectangle and the side projection shape is a circle. Therefore, the plan view in which the rectangle is described and the side view in which the circle is described can be generated, and the drawing data thereof are stored in the drawing data storage unit 9.

Further , for example, the product model data is shown in FIG.
(A) It is assumed that it corresponds to the product model shown on the right side. It is assumed that the product model data is accompanied by data indicating that the target part is omitted. Then, the drawing processing unit 6 obtains the drawing rule with the target part omitted from the drawing rule data in the drawing rule data storage unit 4. Drawing processing unit 6
Does not generate a projection of the product model shown on the right side of FIG. 5A, but generates a projection drawing shown on the left side of FIG. 5A according to the drawing rule. And
The drawing data corresponding to the projection drawing is stored in the drawing data storage unit.

[0070] Example 6. FIG. 7 is a system configuration diagram showing the configuration of a CAD system according to the sixth embodiment of the present invention. In the figure, 5 is a mutual interpretation data storage unit having a correspondence list of the drawing data in the drawing data storage unit 9 and the corresponding product model data in the product model storage unit 7, and 61 is each projection using the product model data. The drawing is created and the data of the drawing is stored in the drawing data storage unit 9, and the correspondence between the created projection drawing and the product model data is stored in the mutual interpretation data storage unit 5.
It is a drawing processing unit registered in.

[0071] Next, the operation will be described. The product model construction processing unit 3 creates a product model in accordance with a user's instruction and stores the product model data in the product model data storage unit 7.
To store. Further, as in the case of the fifth embodiment, the drawing processing unit 61 creates a projection drawing using the product model data in the product model data storage unit 7 according to a user's instruction. At this time, the drawing processing unit 61 registers information indicating which product model data in the product model data storage unit 7 the created projection corresponds to in the mutual interpretation data storage unit 5.

[0072] Then, a command indicating the editing two-dimensional drawing is input, input interpreter 2 starts the drawing data processing unit 8. The drawing data processing unit 8 takes out the corresponding drawing data from the drawing data storage unit 9 and edits the drawing data interactively with the user. The edited drawing data is stored in the drawing data storage unit 9.

[0073] Subsequently, the input interpretation unit 2, to launch the product model construction processing unit 3. The product model construction processing unit 3 takes in the edited drawing data and generates a product model corresponding to the drawing data. The generation operation is the same as in the case of the first embodiment. Then, the old product model data is replaced with the product model data of the newly generated product model.

[0074] Then, drawing processing unit 61 is activated.
The drawing processing unit 61 converts the two-dimensional drawing corresponding to the product model data subjected to the replacement processing into the mutual interpretation data storage unit 5
Know from the data in. Then, the drawing data of the two-dimensional drawing is retrieved from the drawing data storage unit 9. The drawing processing unit 61 corrects, among the extracted drawing data, data related to the projection drawing that is not the target of the editing processing.

[0075] Example 7. Figure 8 is an embodiment of the CAD system according to the second aspect of the present invention is a system configuration diagram showing the configuration of a CAD system according to a seventh embodiment of the present invention. This CAD system is used for each CAD according to the first to sixth embodiments.
It has all the functions of the system. Therefore, in the figure, 62 has the functions of the drawing processing unit 6 shown in FIG. 6 and the drawing processing unit 61 shown in FIG. FIG. 9 is a flowchart showing the operation of this CAD system.

[0076] Next, the operation will be described. From the user
When a data command is input (step ST91),
The input interpretation unit 2 activates each processing unit according to the command. When a data command for creating a two-dimensional drawing is input, the drawing data processing unit 8 creates a two-dimensional drawing in an interactive form with the user (steps ST92, S).
T93). Then, the drawing data of the created two-dimensional drawing is stored in the drawing data storage unit 9 (step ST10).
0).

When the data command is related to the creation or editing of the product model, the product model construction processing unit 3 inputs the data and command to be subsequently input, the drawing rule and the drawing in the drawing rule data storage unit 4. The product model is created or edited using the correspondence data with the drawing data, the drawing data in the drawing data storage unit 9, and the like (steps ST94 to ST9)
7). Then, the product model construction processing unit 3 stores the generated product model or the corrected product model in the product model data storage unit 7 (step ST98).

[0078] Further, by using the data command subsequent drawing processing unit 62 reads the appropriate product model data in the product model data storage unit 7. Then, a two-dimensional projection view (front view, plan view, side view) corresponding to the three-dimensional product model based on the product model data is generated (step ST99). Then, the two-dimensional projection drawing is stored in the drawing data storage unit 9 (step ST100). The process of step ST99 is performed based on a data command for directly performing the process, and steps ST92 to ST9 are performed.
It can also be executed immediately without going through 7.

When one of the projection views is modified, the other projection views can be automatically modified. That is, when a data command indicating editing of a two-dimensional drawing is input, the drawing data processing unit 8 retrieves the corresponding drawing data in the drawing data storage unit 9 and edits the drawing data interactively with the user. The edited drawing data is stored in the drawing data storage unit 9. Then, the product model construction processing unit 3 takes in the edited drawing data and generates a product model corresponding to the drawing data. Then, the old product model data is replaced with the product model data of the newly generated product model. Next, the drawing processing unit 62 knows the two-dimensional drawing corresponding to the product model data subjected to the replacement processing from the data in the mutual interpretation data storage unit 5. Then, the drawing data of the two-dimensional drawing is retrieved from the drawing data storage unit 9. The drawing processing unit 62 corrects the extracted drawing data relating to the projection drawing that is not the target of the editing processing.

[0080] For example, in FIGS. 4 (a) product model data storage unit 7 product model data of a product model is shown on the right side, a front view is a projection view of the product model, the drawing data about the plan view and a side view drawings It is assumed that the data is stored in the data storage unit 9. The front view is as shown on the left side of FIG. Although not shown, the plan view is also rectangular. The side view is circular.

[0081] First, the drawing processing unit 62, interactively with the user, and updates the φ30 listed in front view ø40. The updated graphic data is stored in the drawing data storage unit 9. The product model construction processing unit 3 inputs the drawing data regarding the front view in the drawing data storage unit 9, that is, the rectangular data and the data of φ40, and outputs the correspondence data between the drawing rule and the drawing in the drawing rule data storage unit 4. It is used to generate a cylindrical product model with a diameter of 40. Then, the product model data having the diameter of 30 is updated with the product model data.

The drawing processing unit 62 retrieves the drawing data corresponding to the product model from the drawing data storage unit 9.
Then, the unedited plan view and side view are corrected. That is, the drawing processing unit 62 creates a plan view in which a rectangular shape having a thickness of 40 is described and a side view in which a circle having a diameter of 40 is described from the product model data in the same manner as in the fifth embodiment. Can be generated. Then, the old data is replaced with the newly generated drawing data. As described above, when one projection view related to a product model is edited, other projection views related to the product model are automatically updated.

A two-dimensional and three-dimensional integrated data storage unit that handles two-dimensional data and three-dimensional data in an integrated manner may be provided. In the two-dimensional and three-dimensional integrated data, the drawing data in the drawing data storage unit 9, the product model data in the product model data storage unit 7, and the mutual interpretation data in the mutual interpretation data storage unit 5 are integrated as one data structure. It is a thing. Therefore, in the case of such a configuration, the drawing data processing unit 8 and the product model construction processing unit 3
And the drawing processing unit 62 accesses the two-dimensional and three-dimensional integrated data storage unit.

[0084] Example 8. FIG. 10 is an explanatory diagram for explaining the operation of the CAD system according to the eighth embodiment of the present invention. In addition, this CA
The configuration of the D system is similar to that shown in FIG.

It is assumed that the drawing data storage unit 9 has drawing data relating to the rectangle 101 including the circle 102.
When the user gives an attribute of thickness to the rectangle 101 on the two-dimensional drawing, the product model construction processing unit 3 is activated via the input interpretation unit 2. The product model construction processing unit 3 arranges the rectangle 101 as the graphic 103 in the three-dimensional space, and extends the graphic by the designated thickness in the depth direction to construct the product model 106. The product model data of the constructed product model is stored in the product model data storage unit 7. In the mutual interpretation data storage unit 5, the rectangle 101
The data that associates with the product model is registered.

[0086] Thereafter, when the user gives an attribute called through holes in a circular 102, input interpreting unit 2 recognizes the presence of a product model corresponding to the rectangular 101 from the content of the cross-interpretation data storage unit 5. Then, to correct the product model,
The input interpretation unit 2 activates the product model construction processing unit 3.
The product model construction processing unit 3 arranges the circle 102 as the graphic 104 in the three-dimensional space, compares the arrangement position with the product model 106 already created, and has a product model having a through hole having the graphic 104 as an opening. Build 107.

The product model 107 is created even if the way of giving attributes is reversed. As shown in FIG.
First, it is assumed that the user gives the circle 102 the attribute of a through hole. The input interpretation unit 2 recognizes from the contents of the mutual interpretation data storage unit 5 that the product model corresponding to the rectangle 101 does not exist. Therefore, the product model construction processing unit 3
Then, the graphic 104 having the attribute of the through hole is created on the virtual plane 105 instead of the product model and is saved. In addition, the virtual plane 10 is stored in the mutual interpretation data storage unit 5.
It is registered that the graphic 104 above 5 has been created.

[0088] Thereafter, when the user imparts an attribute rectangular 101, input interpreting unit 2 activates the product model construction processing unit 3. The product model construction processing unit 3 arranges the rectangle 101 as the figure 103 in the three-dimensional space, and extends the figure by the designated thickness in the depth direction to produce the product model 1
Build 06. Further, since it is recognized from the content of the mutual interpretation data storage unit 5 that the graphic 104 on the virtual plane 105 corresponding to the rectangle 101 exists, the graphic 104 on the virtual plane 105 can be applied to the constructed product model 106. Check if Graphic 104, if applicable
A product model 107 having a through hole having an opening is constructed.

[0089] Example 9. 11 claim 3 which is an embodiment of the CAD system according to the invention described, a ninth explanatory diagram for explaining the operation of the CAD system according to an embodiment of the present invention. The structure of this CAD system is similar to that shown in FIG.

The user uses the user interface 1
For example, it is assumed that an operation of giving a cross-section instruction symbol is performed on a plan view corresponding to a rectangular parallelepiped product model having a through hole as illustrated on the left side of FIG. Then, the input interpretation unit 2 knows from the data in the drawing rule data storage unit 4 that the input symbol is a symbol indicating a cross-section instruction.
Further, the existence of the product model corresponding to the plan view is recognized from the contents of the mutual interpretation data storage unit 5. Then, the drawing processing unit 62 is activated. The drawing processing unit 62 retrieves the product model from the product model data storage unit 7. And
Using the product model data and the cross-section designation, a cross-sectional view of the cut surface corresponding to the cross-section designation is created. Further, the cross-sectional view data in which the cross section is hatched is stored in the drawing data storage unit 9. The stored sectional view data is displayed on the display unit of the user interface 1 as needed.

Further , the input interpreter 2 receives the data stored in the drafting rule data storage 4 even when a cross-section designating symbol by a broken line as shown in the left side of FIG. 11B or the left side of FIG. 11C is input. From this, it is known that the input symbol is a symbol indicating a cross-section instruction. Therefore, the drawing processing unit 62
11 (b) or 11 from the corresponding product model.
A cross-sectional view shown in (c) is created. Note that, as shown in FIG. 11B or FIG. 11C, hatching may be omitted.

The cross-section designation can be input even before the product model is created. For example, it is assumed that a cross section designating symbol as shown on the left side of FIG. 11A is set when a product model has not been created yet. Since there is no corresponding product model, the input interpretation unit 2 does not activate the drawing processing unit 62 yet. When the user performs a product model creation operation corresponding to the plan, the product model construction processing unit 3 creates a product model and stores it in the product model data storage unit 7.
At that time, the drawing processing unit 62 is activated to create a cross-sectional view from the created product model.

[0093] Example 10. FIG. 12 shows one embodiment of the CAD system according to the invention of claim 4 , and the CAD according to the tenth embodiment of the invention.
It is a system configuration diagram showing a system configuration. In this case, an operation intention inference processing unit 21 is provided instead of the input interpretation unit 2 in the CAD system shown in FIG. In addition to the function of the input interpretation unit 2, the operation intention inference processing unit 21 has a function of estimating an intention included in a user's operation and enabling a drawing edit process according to the intention.

[0094] Next, the operation will be described. It is assumed that the user inputs a command for giving an attribute of the thickness 50 to the two-dimensional figure 131 as shown on the left side of FIG. 13 through the user interface 1. The operation intention inference processing unit 21 has a user operation intention that (a) creates a product model having a rectangular cross section and a thickness of 50. (b) The thickness direction is a direction perpendicular to the two-dimensional shape (Y direction). ), (C) the arrangement of the product model in the three-dimensional space is consistent with the two-dimensional shape, and (d) if the two-dimensional shape changes, the three-dimensional shape also changes accordingly. Interpret as being modified.

[0095] Then, the operation intended inference processing unit 21 activates the product model construction processing unit 31. The product model construction processing unit 31 arranges the contour shape in the three-dimensional space based on the arrangement in the rectangular ZX coordinate system, and extends it by 50 in the Y-axis direction to form a product model. Note that the contour Y
The coordinate value is assumed to be 0. The operation intention inference processing unit 21 causes the product model construction processing unit 31 to store the user's operation intention together with the product model in the product model data storage unit 7. Further, the fact that the product model corresponding to the rectangle is stored is registered in the mutual interpretation data storage unit 5.

[0096] Then, FIG. 14 (a), the (c), the user of a graphic 131 in a plan view edges 13
It is assumed that a command to move 3 is input. When the operation intention inference processing unit 21 inputs the command, the operation intention inference processing unit 21 confirms whether or not the product model corresponding to the plan view is stored based on the registered content of the mutual interpretation data storage unit 5. If there is a corresponding product model, the operation intention inference processing unit 21
Instructs the product model construction processing unit 31 to correct the figure.

The product model construction processing section 31 corrects the product model according to the user's operation intention stored together with the product model. That is, the product model is modified so as to satisfy the above (A) to (D). As a result,
4 (b) and 4 (d), the surface 134 is modified to the elongated product model 142.

[0098] Example 11. FIG. 15 shows a CAD system according to an eleventh embodiment of the present invention, which is an embodiment of the CAD system according to the fifth aspect of the present invention.
It is a flow chart which shows operation of a system. This CA
The configuration of the D system is the same as that shown in FIG.
In this case, the operation history of the user is stored as the operation intention. In this case, the product model construction processing unit 3
1 also stores the operation history.

[0099] Next, the operation will be described. It is assumed that the user inputs a command for giving an attribute of the thickness 50 to the two-dimensional figure 131 as shown on the left side of FIG. 13 through the user interface 1. Then, the operation intention inference processing unit 21
The product model construction processing unit 31 is activated. The product model construction processing unit 31 extracts a rectangular contour shape (step S
(T151), and stores it in the product model data storage unit 7 (step ST152). Then, the contour shape is arranged in the three-dimensional space based on the arrangement in the ZX coordinate system,
The product model is extended by 50 in the Y-axis direction (step ST153). The product model construction processing unit 31 stores the product model in the product model data storage unit 7.

[0100] In addition, the processing contents of step ST154,
The operation history is stored in the product model data storage unit 7. Further, the operation intention inference processing unit 21 registers in the mutual interpretation data storage unit 5 that the contour shape corresponding to the plan view which is the processing target is stored as the operation history.

[0102] Then, in FIG. 14 (a), the the user inputs a movement commands the shown in FIG. 14 (c) a side 133 of a figure 131 in a plan view thereof. When the operation intention inference processing unit 21 inputs the command, the operation intention inference processing unit 21 confirms whether or not the contour shape corresponding to the plan view is stored based on the registered content of the mutual interpretation data storage unit 5. If there is a corresponding contour shape, the operation intention inference processing unit 21
The product model construction processing unit 31 is instructed to correct the figure. The product model construction processing unit 31 changes the corresponding contour shape so as to match the rectangle changing operation of the user (step ST155). Then, the product model is corrected based on the stored operation history (processing content of step ST154). As described above, the processes shown in FIGS. 14B and 14D are performed, and the product model correction that reflects the operation intention of the user can be performed.

[0102] Example 12. FIG. 16 is an explanatory diagram for explaining the operation of the CAD system according to the twelfth embodiment of the present invention according to the other embodiment of the fifth aspect . The structure of this CAD system is the same as that shown in FIG. The user selects the contour shape 15
When the rectangle corresponding to 1 and its thickness are specified, the operation intention inference unit 21 activates the product model construction processing unit 31 and creates a product model 161 having a three-dimensional shape as shown in FIG. Let After that, it is assumed that the user defines a rectangle corresponding to the contour shape 152 in the rectangle and gives the thickness to the front in the viewing direction. Then, the product model construction processing unit 31, as shown in FIG.
The product model is modified to have the solid 162 corresponding to the operation.

[0103] Further, thereafter, specify the rectangle corresponding to the outline shape 153 that fall between the contour 151 and contour 152, and specifying the recess of the line-of-sight direction rear side. At this time, the operation intention inference unit 21 gives an instruction to the product model construction processing unit 31 to make different corrections to the product model according to the operation intention of the user.

[0104] That is, if the references to contour 151 when the user specifies the thickness to contour 152, as shown in FIG. 16 (c), the contour shape 151
The height of the solid 164 from the plane defined by is the solid 162.
The product model with the concave shape 163 is corrected to have the same height. Here, referring to the contour shape 151 means that when a user defines a rectangle corresponding to the contour shape 152 in a two-dimensional space, an operation such as picking a rectangular component corresponding to the contour shape 151 is involved. Say. When such an operation is involved, it is considered that the user has defined the height of the solid body 162 based on the plane defined by the contour shape 151.

[0105] On the other hand, if the user has not referring to the contour 151 when the specified thickness for the contour shape 152, as shown in FIG. 16 (d), the solid 165 from the plane of the recessed portion The product model with the concave shape 163 is corrected so that the height becomes the same as the height of the solid body 162. When the contour shape 151 is not referred to, it is considered that the user has defined the height of the solid 165 without using the plane defined by the contour shape 151 as a reference. As described above, the product model can be edited while satisfying the operation intention of the user.

[0106] Example 13. FIG. 17 is a CAD system according to a thirteenth embodiment of the present invention, which is an embodiment of the CAD system according to the sixth aspect of the present invention.
It is a block diagram which shows the structure of a system. In addition, FIG.
[Fig. 6] is an explanatory diagram for explaining the operation. In the figure, 2
An operation intention inference processing unit 2 also has a function of interpreting a user's two-dimensional arrangement operation as a three-dimensional shape combining operation.

[0107] Next, the operation will be described. Here, a product having the overall shape 181 shown in FIG. The overall shape 181 is a combination of several (two in this case) three-dimensional partial shapes 182 and 183. The user
The drawing data processing unit 8 creates partial three-view drawings 184 and 185 corresponding to the three-dimensional partial shape. In addition, the product model construction processing unit 3 causes the three-dimensional partial shape 18
A product model corresponding to 2, 183 is created. The correspondence between the partial three-view drawings 184 and 185 and the product model is registered in the mutual interpretation data storage unit 5.

The user performs an operation of overlapping any one of the projection planes 186 and 187 in the partial three-view drawings 184 and 185. Then, the operation intention inference processing unit 22 knows that the three-dimensional partial shapes 182 and 183 corresponding to them are already created, and activates the product model construction processing unit 31. The product model construction processing unit 31 recognizes the overlap between the projection planes, and the corresponding three-dimensional partial shapes 182,
183 is ordered in the depth direction. As a method of ordering, there are a method of following the order of figure selection when superimposing projection views, a method of using the time order in which the partial three-view drawings 184 and 185 are created, and the like.

[0109] ordered 3-dimensional partial shape 182,
Of 83, the positions of the three-dimensional partial shapes 182 and 183 in the depth direction are determined so that the facing parts of the successive shapes contact each other. And each three-dimensional partial shape 1
The overall shape 181 by joining the contacting portions of 82 and 183
To create. The product model corresponding to the overall shape 181 is stored in the product model data storage unit 7. Then
The drawing processing unit 62 operates similarly to the drawing processing unit 6 in the fifth embodiment shown in FIG. 6, and creates a new three-view drawing 188 from the product model in the product model data storage unit 7.

[0110] Example 14. Figure 19 relates to another embodiment of the invention described in claim 6 is an explanatory diagram for explaining the operation of the CAD system according to a fourteenth embodiment of the present invention. The structure of this CAD system is similar to that shown in FIG. Here, FIG.
The overall shape 191 of the product shown in FIG. The overall shape 191 is a combination of several (here, two) three-dimensional partial shapes 192 and 193. The user uses the drawing data processing unit 8 to create partial three-view drawings 194 and 195 corresponding to the three-dimensional partial shape. In addition, the product model construction processing unit 31 causes the three-dimensional partial shapes 192,
A product model corresponding to 193 is created. In addition, the correspondence relationship between the partial three-view drawings 194 and 195 and the product model is
It is registered in the mutual interpretation data storage unit 5.

The user performs an operation of touching the sides of any one of the projection planes 196 and 197 in the partial three-view drawings 194 and 195. Then, the operation intention inference processing unit 22 knows that the three-dimensional partial shapes 192 and 193 corresponding to them are already created, and activates the product model construction processing unit 31. The product model construction processing unit 31 recognizes the joining of the sides of the projection views, and the corresponding three-dimensional partial shape 1
The surfaces 92 and 193 are bonded to the surfaces corresponding to the bonding sides to create the overall shape 191. Here, the positional relationship in the depth direction is determined according to the original partial three-view diagrams 194 and 195.

The product model corresponding to the overall shape 191 is stored in the product model data storage unit 7.
Next, the drawing processing unit 62 operates similarly to the drawing processing unit 6 in the fifth embodiment shown in FIG. 6, and creates a new three-view drawing 198 from the product model in the product model data storage unit 7.

[0113] Example 15. FIG. 20 shows a CAD system according to a fifteenth embodiment of the present invention, which is an embodiment of the CAD system according to the seventh invention.
It is explanatory drawing for demonstrating operation | movement of a system. This C
The configuration of the AD system is the same as that shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. It is assumed that the user performs an operation of moving the line segment element 201 and the line segment element 202, which are the constituent elements of the rectangular two-dimensional figure, in the arrow direction through the user interface 1 as shown in FIG. Operation intention inference processing unit 22
Recognizes that when the line segment elements 201 and 202 are moved, a gap is created at both ends.

[0114] Therefore, the operation intended inference processing unit 22 determines that it should generate a line segment elements 203-205 to fill the gap. The drawing data processing unit 8 moves the line segment elements 201 and 202 according to the determination of the operation intention inference processing unit 22 and adds a new line segment element 203 to 205 to the new line data.
Generate a three-dimensional figure.

When the user performs a moving operation as shown in FIG. 20 (b), since the moving direction of the line segment element 206 and the direction of the line segment element 207 match, the operation intention inference processing section. 22 recognizes that the gap at the left end can be compensated by the extension of the line segment element 207. Therefore, the drawing data processing unit 8 moves the line segment element 206 and
The line segment element 207 is extended to compensate for the gap at the left end.

When the user performs an operation to move the line segment elements 208 and 209 as shown in FIG. 20C , the operation intention inference processing unit 22 still recognizes the occurrence of the gap. . Then, in order to fill the gap, it is determined that a line segment element connecting the end points of the line segment elements 208 and 209 before the movement and the end points after the movement should be generated. The drawing data processing unit 8 generates a new two-dimensional figure to which the line segment elements 208 and 209 have been moved and diagonal line segment elements have been added in accordance with the determination of the operation intention inference processing unit 22.

[0117] Example 16. Figure 21 shows an example of a CAD system according to the invention of claim 8, CAD according to a sixteenth embodiment of the present invention
It is explanatory drawing for demonstrating operation | movement of a system. This C
The configuration of the AD system is the same as that shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. As shown in FIG. 21, the user interface operates to move the line segment element 201 and the line segment element 202, which are the components of the rectangular two-dimensional figure, in the projection direction of the three views in the arrow direction as shown in FIG. Imagine that you went through 1.

Further, it is assumed that the product model corresponding to the three views is stored in the product model data storage unit 7 and the correspondence between the three views and the product model is registered in the mutual interpretation data storage unit 5. . For example, the product model, the three views, and the correspondence are created as follows. That is,
The product model construction processing unit 31 creates a product model according to a user's instruction and stores the product model data in the product model data storage unit 7. Further, the drawing processing unit 62
Is similar to the case of the sixth embodiment, in response to the user's instruction,
A projection drawing is created using the product model data in the product model data storage unit 7. At that time, the drawing processing unit 62 registers in the mutual interpretation data storage unit 5 information indicating which product model data in the product model data storage unit 7 the created projection corresponds to.

The operation intention inference processing unit 22 and the drawing data processing unit 8 operate in the same manner as in the fifteenth embodiment, and the line segment elements 201 and 202 are moved and the line segment elements 203 to 20.
A new two-dimensional figure to which 5 is added is generated. And
The drawing data processing unit 8 stores the corrected three views in the drawing data storage unit 9.

The product model construction processing unit 31 corrects the product model by inserting the three-dimensional shape corresponding to the added line segment elements 203 to 205 into the product model. Next, the drawing processing unit 62 is activated. The drawing processing unit 62 knows the two-dimensional drawing corresponding to the corrected product model data from the data in the mutual interpretation data storage unit 5. Then, each projection drawing is updated based on the product model data subjected to the automatic gap compensation processing.

[0121] Example 17. 22 is a CAD system according to a seventeenth embodiment of the present invention, which is an embodiment of the CAD system according to the ninth invention.
It is explanatory drawing for demonstrating operation | movement of a system. This C
The configuration of the AD system is the same as that shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different.

[0122] Referring now to the flowchart of FIG. 23 will be described operation. The product model construction processing unit 31 creates a product model according to a user's instruction and stores the product model data in the product model data storage unit 7. Further, the drawing processing unit 62 creates a projection drawing using the product model data in the product model data storage unit 7 in accordance with a user's instruction, as in the case of the sixth embodiment. At that time, the drawing processing unit 62 registers in the mutual interpretation data storage unit 5 information indicating which product model data in the product model data storage unit 7 the created projection corresponds to.

[0123] Operation intention inference processing unit 22, when the creation of a product model, the process of user operation as generator operation history data is stored with the product model to the product model data storage unit 7. In addition, the dependency relationship between the components of the product model is also stored together with the generation operation history data.

It is assumed that the user displays a three-view drawing as shown in FIG. 22 on the display unit of the user interface 1. Then, in order to extract the partial shape element in the product model corresponding to the three-view drawing as the processing target partial shape, it is assumed that the constituent element 221 in any one of the three-view drawings is selected.

[0125] Then, the operation intended inference processing unit 22 first identifies a product model based on the registered contents of the mutual interpretation data storage unit 5, the processing target portion shape partial shape elements corresponding to the elements 221 in projection view To extract. Here, the shape element representing the side surface of the cylindrical protruding shape 222 is extracted. Further, the operation intention inference processing unit 22 sets data indicating the shape element 222 representing the side surface of the protruding shape as an initial value in the processing target shape list (step ST231).

[0126] Next, the operation intended inference processing unit 22, a generation operation history data, know extracted shape element in step ST231 is generated through any operation (step ST232). Then, if there are other partial shape elements generated in the same operation unit, they are additionally set in the processing target shape list (steps ST233 and ST2).
34). Here, the shape element 223 representing the upper surface of the cylindrical protruding shape is extracted. As an operation unit,
For example, the CAD command used when creating it is used.

[0127] Further, the dependencies between components, recognize other partial shape element created depending on the shape elements in processed shape list, if there is partial shape elements that depend, they Additional setting is made to the processing target shape list (steps ST235 and ST236). Here, through hole 2
Since 24 is arranged inside the protruding shape and depends on the upper surface 223 of the protruding shape, data indicating each shape element group forming the through hole 224 is additionally set in the processing target shape list.

As described above, the processing target shape list is created. Then, each partial shape element corresponding to the data in the processing target shape list is determined as the final processing target shape. That is, the user simply selects one component in the projection drawing, and a plurality of partial shape elements that the user may desire as a processing target are extracted as the processing target shape. Here, only by selecting the constituent element 221 corresponding to the side surface of the protruding shape, the through hole 224 is extracted together with the shape element 222 and the upper surface portion 223 representing the side surface of the protruding shape. The product model construction processing unit 31 edits the product model for the final processing target shape.

[0129] Example 18. 24 and 25 show one embodiment of the CAD system according to the tenth aspect of the present invention, and are explanatory views for explaining the operation of the CAD system according to the eighteenth embodiment of the present invention. The structure of this CAD system is the same as that shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different.

[0130] Referring now to the flowchart of FIG. 26 will be described operation. It is assumed that the product model corresponding to the three views shown on the left side of FIG. 24 is stored in the product model data storage unit 7, and the correspondence relationship between the three views and the product model is registered in the mutual interpretation data storage unit 5.

It is assumed that the user displays the three-view drawing as shown on the left side of FIG. 24 on the display unit of the user interface 1.
Then, in order to move a certain component, it is assumed that the component 241 in any one of the three views is selected. Further, it is assumed that the user inputs movement parameters such as a movement direction and a movement amount.

[0132] Then, operation intended inference processing unit 22, the first
A three-dimensional partial shape is extracted using the method according to the seventh embodiment (step ST261). Further, the constituent elements in each projection drawing corresponding to the three-dimensional partial shape are extracted (step ST262). Here, the components 242, 243
Is extracted.

[0133] Then, drawing data processing unit 8 is activated.
The drawing data processing unit 8 deletes the components 241, 242, 243 in all projection views (step ST26).
3). Further, the product model construction processing unit 31 is activated.
The product model construction processing unit 31 moves the three-dimensional partial shape extracted in step ST261 in the product model (step ST264).

[0134] Then, drawing processing unit 62 is activated.
The drawing processing unit 62 knows the three-view drawing corresponding to the corrected product model data from the data in the mutual interpretation data storage unit 5. Then, a three-view drawing corresponding to the moved three-dimensional partial shape is created, and the contents of these drawings are reflected in the three-view drawing to update each projection drawing (step ST265).

As described above, the simultaneous movement of the three views (the movement of the components is realized simultaneously in the three views) is realized. The simultaneous movement of the three views can be realized not only when the components are simply moved in parallel, but also when the components 251 are moved with rotation as shown in FIG. In that case, the movement parameter includes a rotation component.

Although the simultaneous movement of the three views has been described here, simultaneous copying of the three views (the copying of the constituents can be realized simultaneously in the three views) and simultaneous deletion of the three views (deletion of the constituents). Be realized simultaneously in three views)
You can also do For example, when the user performs an operation of copying the component 271 in the plan view in the three views shown on the left side of FIG. 27, the three views simultaneous copying is executed by the same processing as the above processing. Further, when the operation of deleting the constituent element 281 in the plan view in the three views shown on the left side of FIG. 28 is performed, the three views simultaneous deletion is executed by the same processing as the above processing.

[0137] However, in the case of the 3-view drawing simultaneous copying, drawing data processing unit 8 does not perform the deletion processing, the product model construction processing unit 31 extracts three-dimensional partial shape rather than moving the replication Create and move it. In the case of simultaneous deletion of three views, the product model construction processing unit 31 does not move the extracted three-dimensional partial shape but deletes it.

[0138] Example 19. 29 is an explanatory diagram for explaining the operation of the CAD system according to the nineteenth embodiment of the present invention according to the tenth embodiment of the present invention. The structure of this CAD system is the same as the structure shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. According to this embodiment, even when the constituent elements in the two-dimensional drawing move on a projection drawing different from the original projection drawing, the simultaneous movement of the three views is realized.

[0139] Next, the operation will be described. It is assumed that the product models corresponding to the three views shown on the left side of FIG. 29 are stored in the product model data storage unit 7, and the correspondence relationship between the three views and the product models is registered in the mutual interpretation data storage unit 5.

It is assumed that the user displays a three-view drawing as shown on the left side of FIG. 29 on the display unit of the user interface 1.
Then, it is assumed that the component 291 in any one of the three views is selected in order to move the certain component. Further, it is assumed that the user inputs movement parameters such as a movement direction and a movement amount.

[0141] Then, the operation intended inference processing unit 22 extracts, for example, the 3-dimensional partial shape using a method according to an embodiment of the seventeenth. Further, the constituent elements in each projection drawing corresponding to the three-dimensional partial shape are extracted. At this time, the operation intention inference processing unit 22 recognizes that the movement is movement across two projection planes, and notifies the product model construction processing unit 31 to that effect.

[0142] Then, drawing data processing unit 8 is activated.
The drawing data processing unit 8 deletes the constituent elements in all projection views. Further, the product model construction processing unit 31 is activated. The product model construction processing unit 31 moves the extracted three-dimensional partial shape in the product model. Further, the product model construction processing unit 31 rotates the three-dimensional partial shape by the relative angle between the projection plane of the movement source and the projection plane of the movement destination, based on the notification from the operation intention inference processing unit 22. Make a move.

[0143] Then, drawing processing unit 62 is activated.
The drawing processing unit 62 creates a three-view drawing corresponding to the three-dimensional partial shape after the movement, and reflects the drawing contents in the three-view drawing to update each projection drawing. It is also possible to perform simultaneous copying of three views. In that case, the drawing data processing unit 8 does not perform the deletion process, and the product model construction processing unit 31 does not move the extracted three-dimensional partial shape, but creates a copy of the three-dimensional partial shape and performs rotation and movement processing on it. I do.

[0144] Example 20. FIG. 30 shows one embodiment of the CAD system according to the invention of claim 11 , and CA according to the twentieth embodiment of the present invention.
It is explanatory drawing for demonstrating operation | movement of D system. The structure of this CAD system is the same as the structure shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. According to this embodiment, when the three-view drawing simultaneous movement is executed, the components after the movement are automatically changed to an appropriate shape according to the shape of the movement destination.

[0145] Next, the operation will be described. Figure 30 (a)
The product model corresponding to the projection view shown on the left side is stored in the product model data storage unit 7, and the correspondence between the three-view drawing including the projection view and the product model is stored in the mutual interpretation data storage unit 5.
Assume that you are registered with.

It is assumed that the user displays a projection view as shown on the left side of FIG. 30A on the display unit of the user interface 1. Then, suppose it is selected to move the component 301. Further, it is assumed that the user inputs movement parameters such as a movement direction and a movement amount.

[0147] Then, the operation intended inference processing unit 22 extracts the 3-dimensional partial shape corresponding to the element selected.
Further, the constituent elements in each projection drawing corresponding to the three-dimensional partial shape are extracted. Here, the operation intention inference processing unit 22
Recognizes a surrounding condition such as a connection condition between the three-dimensional partial shape and its surrounding shape from the movement parameter and the product model. In the example shown in FIG. 30A, the cylindrical protrusion shape 301 is selected. Therefore, the operation intention inference processing unit 22 recognizes the connection condition with the plane 302. The recognized connection condition is notified to the product model construction processing unit 31.

[0148] Then, drawing data processing unit 8 is activated.
The drawing data processing unit 8 deletes the constituent elements in all projection views. Further, the product model construction processing unit 31 is activated. The product model construction processing unit 31 moves the extracted three-dimensional partial shape in the product model. At this time, the root portion of the three-dimensional partial shape of the protrusion shape 301 is deformed so that the connection condition after the movement matches the connection condition before the movement, and then the movement is performed.

[0149] Then, drawing processing unit 62 is activated.
The drawing processing unit 62 creates a three-view drawing corresponding to the three-dimensional partial shape after the movement, and reflects the drawing contents in the three-view drawing to update each projection drawing. As described above, FIG.
(A) As shown on the right side, a three-sided view showing the shape of a protrusion properly connected to the flat surface 303 that comes into contact after the movement (here,
Only one projection is shown. ) Is created.

Further, in the example shown in FIG. 30B , the through hole 304 is selected. Therefore, the operation intention inference processing unit 22 recognizes the connection condition with the planes 305 and 306.
The product model construction processing unit 31 moves the three-dimensional partial shape of the extracted through hole in the product model. At this time, the through hole is expanded so that the connection condition after the movement matches the connection condition before the movement, and then the movement is performed. Therefore, FIG.
(B) As shown on the right side, a three-sided view showing a through hole appropriately connected to the flat surface 307 contacting after the movement (here, 1
Only the projection view is shown. ) Is created. In the case where this embodiment is not used, when the moving processing of the through hole 304 is performed, the hole that does not penetrate after the movement is shown.

Further, simultaneous copying of three views can be performed. In that case, the drawing data processing unit 8 does not perform the deletion process, and the product model construction processing unit 31 does not move the extracted three-dimensional partial shape but creates a copy of the three-dimensional partial shape and performs deformation and movement processing on it. I do.

[0152] Example 21. FIG. 31 shows a CA according to a twenty-first embodiment of the present invention, which is an embodiment of the CAD system according to the twelfth invention.
It is explanatory drawing for demonstrating operation | movement of D system. The structure of this CAD system is the same as the structure shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. According to this embodiment, when the component to be moved refers to another figure when the three-view drawing simultaneous movement is executed, the component after the movement appropriately refers to another figure. The shape is automatically changed.

[0153] Next, the operation will be described. The product model construction processing unit 31 creates a product model according to a user's instruction and stores the product model data in the product model data 8. In addition, the drawing processing unit 62 creates a projection drawing using the product model data in the product model data storage unit 7 according to a user's instruction. At that time, the drawing processing unit 62
Registers in the mutual interpretation data storage unit 5 information indicating which product model data in the product model data storage unit 7 the created projection drawing corresponds to. Operation intention inference processing unit 2
The reference numeral 2 stores the process of user operation for the three-dimensional partial shape forming the product model as generation operation history data in the product model data storage unit 7 together with the product model when the product model is created.

As shown on the left side of FIG . 31, when the user selects the constituent element 311 in the two-dimensional drawing, the operation intention inference processing unit 22 first creates the product model based on the registered contents of the mutual interpretation data storage unit 5. Identify and configure 31
The partial shape element corresponding to 1 is extracted as the processing target partial shape. Further, the operation intention inference processing unit 22 knows through what operation the partial shape element was generated from the generated operation history data corresponding to the product model. When it is determined that the operation depends on another figure or shape element, the product model construction processing unit 31 is notified of that fact.

[0155] Then, drawing data processing unit 8 is activated.
The drawing data processing unit 8 deletes the portion corresponding to the constituent element 311 in all projection views. Further, the product model construction processing unit 31 is activated. Product model construction processing unit 31
Moves the extracted three-dimensional partial shape in the product model. At this time, if it is known that the operation for creating the partial shape element depends on another figure or shape element, the three-dimensional partial shape is transformed so that the dependency relationship holds even after the movement. Move from.

In the example shown in FIG . 31, it is assumed that the cylindrical projection shape 311 to be moved has the same height as the flat surface 312 at the time of its creation. Then, the operation is set in the generation operation history data. Therefore, the product model construction processing unit 31 moves after deforming the projection shape so that the height after movement becomes the same as the height of the plane 312.

[0157] Then, drawing processing unit 62 is activated.
The drawing processing unit 62 creates a three-view drawing corresponding to the three-dimensional partial shape after the movement, and reflects the drawing contents in the three-view drawing to update each projection drawing. As described above, a three-view drawing (here, only one projection drawing is shown) as shown on the right side of FIG. 31 is created.

[0158] Simultaneous copying of three views can also be performed. In that case, the drawing data processing unit 8 does not perform the deletion process, and the product model construction processing unit 31 does not move the extracted three-dimensional partial shape but creates a copy of the three-dimensional partial shape and performs deformation and movement processing on it. I do.

[0159] Example 22. FIG. 32 shows a CAD system according to a thirteenth embodiment of the present invention, which is a CA according to the twenty-second embodiment of the present invention.
It is explanatory drawing for demonstrating operation | movement of D system. The structure of this CAD system is the same as the structure shown in FIG. 17, although the function of the operation intention inference processing unit 22 is slightly different. According to this embodiment, when the three-view drawing simultaneous copying is executed, the generation operation history data of the constituent element to be moved is shared between the original constituent element and the new constituent element.

[0160] Next, the operation will be described. The product model construction processing unit 31 creates a product model according to a user's instruction and stores the product model data in the product model data 8. In addition, the drawing processing unit 62 creates a projection drawing using the product model data in the product model data storage unit 7 according to a user's instruction. At that time, the drawing processing unit 62
Registers in the mutual interpretation data storage unit 5 information indicating which product model data in the product model data storage unit 7 the created projection drawing corresponds to. Operation intention inference processing unit 2
The reference numeral 2 stores the process of user operation for the three-dimensional partial shape forming the product model as generation operation history data in the product model data storage unit 7 together with the product model when the product model is created.

As shown in the upper part of FIG . 32A, when the user selects the component 321 in the two-dimensional drawing for copying, the operation intention inference processing unit 22 first registers the mutual interpretation data storage unit 5. The product model is specified based on the contents, and the partial shape element corresponding to the constituent element 321 is extracted as the processing target partial shape. Then, the copying process is performed in the same manner as the process of the eighteenth embodiment and the like.

In the copy processing, the operation intention inference processing unit 22 stores in the product model data storage unit information that the generation operation history data regarding the selected component is shared with the component generated by copying. Set.
In the example shown in FIG. 32, the generation operation history data 322 includes the original constituent element 321 and the constituent element 32 generated by copying.
Shared with 3. In addition, when repeated copying is executed or a new constituent element is created by copying a new constituent element 323, one generation operation history data 322 is shared among the constituent elements.

[0163] Then, the shape change operation for one of the components is made, the operation intended inference processing unit 22 changes the generated operation history data. Then, similarly to the sixth embodiment, the product model construction processing unit 31 corrects the product model, and the drawing processing unit 62 updates each projection drawing of the corrected product model.

When the product model construction processing unit 31 corrects the product model, the operation intention inference processing unit 22 shares the generated operation history data for the constituent elements related to the shape change with other constituent elements. Check if When shared, the product model construction processing unit 31 is instructed to correct the three-dimensional partial shapes corresponding to the other constituents in the same manner as the three-dimensional partial shapes corresponding to the original constituents. .

In this way, for example, the component 321
When an operation for changing the height or diameter of the component is performed, a projection view in which the height or diameter of the component 323 is also changed as shown in FIG. 32 (b) or (c) is obtained. To be

[0166]

As described above, according to the invention as set forth in claim 1 , based on the drafting rules relating to the two-dimensional drawings showing the drafting symbols or the graphic representations peculiar to the drafting drawings, which are predetermined such as the official standard, and the drafting rules. From the drafting rule data storage unit that holds drafting rule data that associates two-dimensional figures drawn in three-dimensional form and three-dimensional figures represented by symbols and a product model having a three-dimensional solid shape and attributes, the drafting rule data Since it is configured to include a drawing processing unit that creates each projection drawing of the product model using, the drawing rule data that associates the drawing rule with the three-dimensional figure is used, and the three-dimensional solid shape and the attribute Since it is configured to create each projection drawing of the product model from the product model having, the projection drawing based on the drawing rules such as the front view, the plan view and the side view is automatically generated from the product model. Form is, there is an effect to save the trouble of creating projection drawing.

[0167] According to the second aspect of the invention, 2-dimensional figure drawn on the basis of this drafting rules and drafting rules for two-dimensional drawing showing a predetermined drafting symbols and drafting drawings unique graphical representation such as the official standard Drafting rule data storage that holds drafting rule data that associates with 3D figures represented by symbols and symbols, drawing data processing unit that creates or edits 2D drawings according to instructions from the user interface, and this drawing data processing A product model construction processing unit that creates or edits a product model having a three-dimensional solid shape and attributes from the two-dimensional drawing created or edited by the department using the drawing rule data, and the two-dimensional drawing and the corresponding product model And a mutual interpretation data storage unit that stores a correspondence relationship between the drawing model and the drafting rule data for the product model. Created projection views, registering the correspondence between the created projection views and the product model in the mutual interpretation data storage unit, and when at least one projection view is edited by the drawing data processing unit, The two-dimensional drawing is configured to include a drawing processing unit that knows from the mutual interpretation data storage unit and uses the drafting rule data to create another projection drawing of the product model corresponding to the two-dimensional drawing. Construction of the product model from the two-dimensional drawing, creation of each projection view such as front view, plan view, side view of the product model from the product model, and the projection when one of the projection views is edited. It is possible to automatically generate a product model corresponding to a drawing (two-dimensional drawing data) and to create other projection views of the product model, and reduce the time and editing time required for drawing creation. Together, an effect of improving the quality to prevent inconsistencies between the projection drawing.

[0168] According to the third aspect of the present invention, the drawings processing unit, the user interface when editing two-dimensional drawing when the two-dimensional drawing in section indicated symbol is given, the drawing rule data storage Internal Since the section designating symbol is recognized as the cutting instruction of the product model based on the drawing rule data, and the two-dimensional drawing showing the section shape of the product model corresponding to the two-dimensional drawing is generated, the product model is constructed. Since it is possible to automatically generate a two-dimensional drawing showing the cross-sectional shape of the cross-section, it is not necessary for the user to predict and draw the cross-section, and the cross-section creation time can be shortened, and artificial creation of cross-sections can be prevented. effective.

[0169] According to the fourth aspect of the present invention includes an operation intention inference processing unit to estimate the operation intended by the user by the user interface when editing two-dimensional drawing, product model construction processing unit, the operation intended inference processing Since the product model is created and edited according to the inference result of the department, the user's intention included in the process of creating individual graphic elements can be reflected in the product model, so that the user can express the design intention. Even if you forget it, you can build a product model based on that intention, which has the effect of improving design quality.

[0170] According to the invention of claim 5, wherein the product model construction processing unit, when creating a product model corresponding to the two-dimensional drawing, and save the operating history of the processing contents in the product model data storage unit, then When the 2D drawing is edited, the product model corresponding to the edited 2D drawing is modified based on the saved operation history. Therefore, the product model created once is created. With regard to, simplifies the user's graphic operations that accompany new operations,
This has the effect of shortening the editing time and improving the design quality.

[0171] According to the sixth aspect of the present invention, operation intended inference processing unit, a plurality of contact a 2-dimensional graphic process performed by the user interface, a plurality of 3-dimensional partial shape corresponding to those of the two-dimensional figure Since it is determined to be the joining process, and the product model construction processing unit is configured to join the plurality of three-dimensional partial shapes prepared in advance and generate one product model in accordance with the determination of the joining process. It is possible to construct a complicated product model by simply combining simple figures in order, which has the effect of simplifying the user's design work.

[0172] According to the invention of claim 7, wherein the operation intention inference processing unit, when the movement of the line segment element which is a component of a two-dimensional figure from the user interface has been made, caused by the movement of the line segment elements Recognizing the gap and determining the generation of a new line segment element for filling the gap, the drawing data processing unit, the new line segment element for filling the gap according to the determination of the operation intention inference processing unit Since it is configured to generate a new two-dimensional figure by adding, it is efficient to create and edit a figure that represents the contour shape of a product by gradually refining it from a simple shape such as a rectangle. Since it can be performed frequently, it is possible to prevent an incorrect figure from being created by an erroneous operation.

[0173] According to the invention of claim 8, the product model construction processing unit, correction of the product model in response to a new two-dimensional figure, which is generated by adding a new line segment elements to fill the gap Since the drawing processing unit is configured to create each projection drawing from the modified product model, it is possible to improve the efficiency of gradually refining a simple shape to generate a new two-dimensional figure. This work is reflected in all the remaining projection views, which has the effect of shortening the time required to create the product model and the projection views.

[0174] According to the invention of claim 9, wherein the operation intention inference processing unit, when generating the product model by the product model construction processing unit, product model data generation operation history for each 3-dimensional partial shape of the product model When the constituent element of the two-dimensional drawing is selected by the drawing data processing unit after being stored in the storage unit, the three items to be edited by the product model construction processing unit based on the product model generation operation history corresponding to the selected constituent element. Since it is configured to determine the range of the three-dimensional partial shape, it becomes possible to automatically set the processing target range intended by the user only by selecting any one of the graphic elements, and when individually selecting the processing target range. Compared with, there is an effect that the time required for the selection operation is shortened, and selection error and selection omission can be prevented.

[0175] According to the invention of claim 10, wherein the product model construction processing unit, keep product model based on a range of 3-dimensional partial shape of the edited defined fix the 3-dimensional partial shape, drawings of Since the processing unit is configured to create each projection drawing for the product model in which the three-dimensional partial shape is corrected, the projection drawing can be created more than when the user individually selects a copy target or a deletion target. The required time is shortened, the consistency between the projection views is maintained, and the inconsistency between the projection views due to the selection error or the selection omission can be prevented.

[0176] According to the invention of claim 11, wherein the operation intention inference processing unit, when the correction operation of the components on the two-dimensional drawing was made, three-dimensional portions corresponding to the components subject to modifications The product model construction processing unit recognizes the shape and the surrounding conditions such as the connection condition with the surrounding shape of the three-dimensional partial shape, and the product model construction processing unit corrects the three-dimensional partial shape that matches the recognized surrounding status. Since it is configured to generate a model, when modifying the drawing, the user does not have to modify the detailed parts according to the shape of the destination or copy destination of the component to be modified, which shortens the drawing modification time. There is an effect that can be done.

[0177] According to the invention of claim 12, wherein the operation intention inference processing unit, a product by generating the product model, the generation process by a user operation of the three-dimensional partial shape constituting the product model as a product operation history model When the data is stored in the data storage unit and a correction operation is performed on the component on the two-dimensional drawing, 3 corresponding to the component to be corrected
Of the three-dimensional partial shape and the peripheral shape of the three-dimensional partial shape are detected from the generation operation history, and the product model construction processing unit corrects the three-dimensional partial shape that matches the detected dependency of the peripheral shape. Since it is configured to generate a product model by performing the above, when modifying the drawing, the user does not need to modify the detailed parts according to the shape of the destination of the component or the copy destination, and the drawing modification time is shortened. There is an effect that can be done.

[0178] According to the invention of claim 13, wherein the operation intention inference processing unit, when generating the product model, product model data a process of user operation of the three-dimensional partial shape constituting the product model as a generation operation history When a copying operation of a constituent element on a two-dimensional drawing is carried out and stored in a storage unit, a generation operation history of a three-dimensional partial shape corresponding to the constituent element corresponds to a new constituent element generated by copying. It is set to be shared by a new generation operation history of a three-dimensional partial shape, and the product model construction processing unit generates a product model having a three-dimensional partial shape corresponding to the new component, When a correction operation is performed on any one of the component and the new component, a common correction is made to each corresponding three-dimensional partial shape based on the new generation operation history. Since it is configured to generate a new product model, by sharing the generation operation history between the copy source shape and the copy destination shape, it is possible to handle both as one logical group, and forget the operation. There is an effect that it is possible to prevent inaccurate drawing creation due to a parameter input error.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a CAD system according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining a process of a product model construction processing unit according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a relationship between a two-dimensional figure and a product model by a drawing symbol regarding a shape according to a second embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a relationship between a two-dimensional graphic and a product model by a drawing symbol regarding dimensions according to a third embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a relationship between a two-dimensional figure and a product model using drawing symbols relating to omission and repetition according to the fourth embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a CAD system according to a fifth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a CAD system according to a sixth embodiment of the present invention.

FIG. 8 is a block diagram showing the configuration of a CAD system according to a seventh embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the CAD system according to the fifth embodiment of the present invention.

FIG. 10 is an explanatory diagram for explaining the operation of the CAD system according to the eighth embodiment of the present invention.

FIG. 11 is an explanatory diagram for explaining the operation of the CAD system according to the ninth embodiment of the present invention.

FIG. 12 is a block diagram showing the configuration of a CAD system according to a tenth embodiment of the present invention.

FIG. 13 is an explanatory diagram for explaining the operation of the CAD system according to the tenth embodiment of the present invention.

FIG. 14 is an explanatory diagram for explaining the operation of the CAD system according to the tenth embodiment of the present invention.

FIG. 15 is a flowchart showing the operation of the CAD system according to the eleventh embodiment of the present invention.

FIG. 16 is an explanatory diagram for explaining the operation of the CAD system according to the twelfth embodiment of the present invention.

FIG. 17 is a block diagram showing the structure of a CAD system according to a thirteenth embodiment of the present invention.

FIG. 18 is an explanatory diagram for explaining the operation of the CAD system according to the thirteenth embodiment of the present invention.

FIG. 19 is an explanatory diagram for explaining the operation of the CAD system according to the fourteenth embodiment of the present invention.

FIG. 20 is an explanatory diagram for explaining the operation of the CAD system according to the fifteenth embodiment of the present invention.

FIG. 21 is an explanatory diagram for explaining the operation of the CAD system according to the sixteenth embodiment of the present invention.

FIG. 22 is an explanatory diagram for explaining the operation of the CAD system according to the seventeenth embodiment of the present invention.

FIG. 23 is a flowchart showing the operation of the CAD system according to the seventeenth embodiment of the present invention.

FIG. 24 is an explanatory diagram for explaining the operation of the CAD system according to the eighteenth embodiment of the present invention.

FIG. 25 is an explanatory diagram for explaining the operation of the CAD system according to the eighteenth embodiment of the present invention.

FIG. 26 is a flowchart showing the operation of the CAD system according to the eighteenth embodiment of the present invention.

FIG. 27 is an explanatory diagram showing an operation relating to copying of the CAD system according to the eighteenth embodiment of the present invention.

FIG. 28 is an explanatory diagram showing an operation related to deletion of the CAD system according to the eighteenth embodiment of the present invention.

FIG. 29 is an explanatory diagram for explaining the operation of the CAD system according to the nineteenth embodiment of the present invention.

FIG. 30 is an explanatory diagram for explaining the operation of the CAD system according to the twentieth embodiment of the present invention.

FIG. 31 is an explanatory diagram for explaining the operation of the CAD system according to the twenty-first embodiment of the present invention.

FIG. 32 is an explanatory diagram for explaining the operation of the CAD system according to the twenty-second embodiment of the present invention.

FIG. 33 is a flowchart showing the flow of design work by the CAD system.

FIG. 34 is an explanatory diagram for explaining the operation of the conventional CAD system.

[Explanation of symbols]

2 Input interpretation unit, 3,31 Product model construction processing unit, 4
Drafting rule data storage , 6,61,62 Drawing process
Part, 8 drawing data processing part, 21 , 22 operation intention inference processing part.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-7171 (JP, A) JP-A-5-81358 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G06F 17/50

Claims (13)

(57) [Claims] 1. A CAD system for creating a product model from a two-dimensional graphic and for creating each projection of the product model. In the CAD system, a two-dimensional drawing showing a predetermined drawing symbol such as an official standard or a graphic representation peculiar to the drawing drawing. A drafting rule data storage unit that holds drafting rule data that associates drafting rules for drawings with three-dimensional figures represented by symbols and two-dimensional figures drawn based on each drafting rule, and a three-dimensional solid shape and attributes. And a drawing processing unit that creates each projection drawing of the product model using the drawing rule data from the product model having
system. 2. A CAD system for creating a product model from a two-dimensional graphic and for creating each projection of the product model. In the CAD system, a two-dimensional drawing showing a predetermined drawing symbol such as an official standard or a graphic representation peculiar to the drawing drawing. A drafting rule data storage unit that holds drafting rule data that associates drafting rules for drawings with three-dimensional figures represented by symbols and two-dimensional figures drawn based on each drafting rule, and according to instructions from the user interface 2 A drawing data processing unit for creating or editing a three-dimensional drawing, and a product model having a three-dimensional solid shape and attributes using the drawing rule data from the two-dimensional drawing created or edited by the drawing data processing unit The product model construction processing unit that stores the two-dimensional drawings and the mutual interpretation data that stores the correspondence relationship between the two-dimensional drawings and the corresponding product models. Using the drafting rule data for the storage unit and the product model, each projection drawing based on the drafting rule is created, and the correspondence relationship between the created projection drawing and the product model is registered in the mutual interpretation data storage unit. If at least one projection drawing is edited by the drawing data processing unit, the two-dimensional drawing is known from the mutual interpretation data storage unit and the product model corresponding to the two-dimensional drawing is created by using the drawing rule data. And a drawing processing unit that creates another projection drawing of the CAD system. 3. The drawing processing unit, when a two-dimensional drawing is given a cross-section designating symbol by the user interface when the two-dimensional drawing is edited, the section is created based on the drawing rule data in the drawing rule data storage unit. 3. The CAD system according to claim 2 , wherein the instruction symbol is recognized as a cutting instruction of a product model, and a two-dimensional drawing showing a cross-sectional shape of the product model corresponding to the two-dimensional drawing is generated. 4. An operation intention inference processing unit for estimating an operation intention of a user by a user interface when editing a two-dimensional drawing, wherein the product model construction processing unit is configured to generate a product model according to the estimation result of the operation intention inference processing unit. The CAD system according to any one of claims 1 to 3 , which is created and edited. 5. When the product model construction processing unit creates a product model corresponding to a two-dimensional drawing, the operation history of the processing contents is saved in the product model data storage unit, and the operation intention inference processing unit is operated by the operation intention inference processing unit. In the case where the registration of the history saving is registered in the mutual interpretation data storage unit, and the registered content of the operation history storage related to the two-dimensional drawing is confirmed from the mutual interpretation data storage unit when the two-dimensional drawing is newly edited, The product model construction processing unit is caused to correct the original product model corresponding to the edited two-dimensional drawing based on the stored operation history.
The CAD system according to claim 4 . 6. The product model, wherein the operation intention inference processing unit determines that the process of contacting a plurality of two-dimensional figures performed by the user interface is a process of joining a plurality of three-dimensional partial shapes corresponding to those two-dimensional figures. construction processor, in response to determination of the bonding process to generate a single product model by joining canned said plurality of 3-dimensional partial shape according to claim 4 or 請
The CAD system according to claim 5 . 7. The operation intention inference processing unit recognizes a gap generated by the movement of the line segment element when the line segment element, which is a constituent element of the two-dimensional figure, is moved from the user interface, and detects the gap. The generation of a new line segment element for filling is determined, and the drawing data processing unit adds a new line segment element for filling the gap in accordance with the determination of the operation intention inference processing unit and adds a new two-dimensional shape. Claim generating a figure
The CAD system according to claim 4 or claim 5 . 8. The product model construction processing unit corrects the product model corresponding to a new two-dimensional figure generated by adding a new line segment element for filling the gap, and the drawing processing unit The CAD system according to claim 7 , wherein each projection drawing is created from the modified product model. 9. The operation intention inference processing unit saves a generation operation history for each three-dimensional partial shape of the product model in the product model data storage unit when the product model construction processing unit generates the product model, and draws the drawing data. When the processing unit selects a constituent element of the two-dimensional drawing, the range of the three-dimensional partial shape to be edited by the product model construction processing unit is determined based on the generation operation history of the product model corresponding to the selected constituent element. The CAD system according to claim 5, wherein: 10. The product model construction processing unit corrects the three-dimensional partial shape in the product model based on the defined range of the three-dimensional partial shape to be edited, and the drawing processing unit causes the three-dimensional partial shape to be corrected. To create each projection for the modified product model
The CAD system according to claim 9 . 11. The operation intention inference processing unit, when a modification operation of a component on a two-dimensional drawing is performed, a three-dimensional partial shape corresponding to the modification target component and the 3
The product model construction processing unit recognizes a surrounding situation such as a connection condition with the surrounding shape of the three-dimensional partial shape, and the product model construction processing unit corrects the three-dimensional partial shape that matches the recognized surrounding situation to generate a product model. The CAD system according to claim 4 or 5, wherein: 12. The operation intention inference processing unit stores a generation process by a user operation for a three-dimensional partial shape forming the product model in the product model data storage unit as a generation operation history when the product model is generated. When a correction operation is performed on a component on a three-dimensional drawing, a dependency relationship between the three-dimensional partial shape corresponding to the component to be corrected and the peripheral shape of the three-dimensional partial shape is detected from the generation operation history. , claim product model construction processing unit performs a correction of the 3-dimensional partial shape matching the dependency on said detected peripheral shape and generates a product model 11
CAD system described. 13. The operation intention inference processing unit stores a process of user operation for a three-dimensional partial shape forming the product model as a generated operation history in the product model data storage unit when the product model is generated, and the two-dimensional operation is performed. When a copy operation of a component on the drawing is performed, 3 corresponding to the component
The generation operation history of the three-dimensional partial shape is set to be shared by the new generation operation history of the three-dimensional partial shape corresponding to the new constituent element generated by copying, and the product model construction processing unit sets the new constituent element. When a product model having a three-dimensional partial shape corresponding to is generated and a correction operation is performed on one of the original component and the new component on the two-dimensional drawing, the new generation operation history 6. The CAD system according to claim 5, wherein a new product model is generated by performing common correction on each corresponding three-dimensional partial shape based on the above.