JPH064117A - Method and device for alterating graphic form in cad/cam system - Google Patents

Abstract

PURPOSE:To easily alter the shape of a component at the time of the designing of a device such as a metallic mold. CONSTITUTION:When a representative value variation part 11 varies the representative value of one element component, an element component design procedure control part 12 checks the adaption of the element component whose representative value is varied as to a design rule and then an element component list 24 wherein an element component relative to the element component is registered is retrieved by using a relative component retrieval part 13. Then the representative value of the found element component is varied by a subordinate variation part 14 according to the representative value varied by the representative value variation part 11 and a relative component design procedure control part 15 checks the adaption of the element component whose representative value is varied as to the design rule.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD / CAM system used in designing dies, and more particularly to a method and apparatus for changing a figure at the time of design.

[0002]

2. Description of the Related Art In a CAD / CAM system used for shortening the time required to create a graphic representation in a die design or the like, each graphic element is stored as part data in the inside thereof in order to facilitate the input of a graphic. The method of making is popular.

Further, for each plate, data indicating the position and shape of the hole to be formed in the plate is stored inside the system, and a support system for performing work based on this data (Japanese Patent Laid-Open No. 62-137129). ), Or by designating an arbitrary range on the plate, a system (Japanese Unexamined Patent Publication No. 1-244573) for collectively moving components, component holes, and the like in the designated range to different positions is proposed.

However, in the above-mentioned system in which the position and shape of the hole to be formed in each plate are internally stored as data for each plate, the data is the data for the hole machining operation. Regarding the shape of the holes and the mutual relationship between the holes, the data is a fixed relationship.
Therefore, when changing the position or shape of a component during the design process, there has been a problem that new data corresponding to the change must be created.

Further, in the above-mentioned system in which the parts and the parts holes in the designated range are moved in a lump, it is possible to change the positions of the parts and the parts holes or change the rotations, but the parts having the same shape are used. It is supposed to be done. Therefore, when the shape of the component is changed at the time of designing, there is a problem that new data must be created in response to the change.

Therefore, in order to solve the above problem, the inventors of the present invention represent each assembly by an element part list that indicates a set of element parts whose respective shapes are represented by representative values, and define a set of graphic elements. In a CAD / CAM system in which each of the element parts is represented by a designated graphic element list, a step of changing the representative value of the element part and a related element part of the element part whose representative value is changed by this step are described. A figure changing method in a CAD / CAM system comprising a step of searching and a step of changing the representative value of the element parts retrieved by this step according to the changed representative value.

A representative value changing unit for changing the representative value of the element component, a related component retrieving unit for retrieving the element component related to the element component whose representative value is changed by the representative value changing unit, and the related component. CAD / CA including a subordinate change unit that changes the representative value of the element parts searched by the search unit according to the representative value changed by the representative value change unit.
We proposed a figure changing device for M system.

[0008]

However, in the above method and apparatus proposed by the present inventors, even if there is a design problem with the changed representative value, the work is continued as it is, and an erroneous design is finally determined. There was a problem that it might go.

The present invention was conceived to solve the above problems, and an object thereof is to provide a figure changing method and its apparatus in a CAD / CAM system capable of simplifying the correction of the shape of parts. is there.

[0010]

In order to solve the above problems, the figure changing method in the CAD / CAM system of the present invention uses an element parts list that indicates a set of element parts whose respective shapes are represented by a representative value. Applying to a CAD / CAM system in which each of the element parts is represented by a graphic element list that represents each set of graphic elements and changes the representative value of the element part and the representative value The first step for checking the conformity in the design rule of the element part whose representative value has been changed by the step to perform, and if the rule conformity judgment in the first step determines that the rule is not conforming, the fact that it is not conforming is displayed. Displayed on the screen and returning the changed value to the value before the change, and the element part whose representative value has been changed by the step of changing the representative value The representative value is changed by the step of searching for related element parts, the step of changing the representative value of the element parts searched by this step according to the changed representative value, and the step of changing the representative value. The second step of checking the conformity of the element part in the design rule, and if the rule conformity judgment in the second step determines that the element is not conforming, the fact that the element is not conforming is displayed on the display and the first step and And a step of returning the changed value changed in the second step to the value before the change.

Further, in the figure changing method in the CAD / CAM system of the present invention, each assembly is expressed by the element part list indicating the set of element parts whose respective shapes are shown by the representative values, and the set of graphic elements is specified. A representative value changing unit that applies a CAD / CAM system in which each of the element parts is represented by a graphic element list that changes the representative value of the element part, and an element whose representative value is changed by the representative value changing unit An element part design procedure control unit that checks the conformity of the part design rule,
A related component search unit that searches for an element component related to the element component whose representative value is changed by the representative value changing unit, and a representative value of the element component searched by this related component search unit,
A subordinate changing unit that changes the representative value according to the representative value changed by the representative value changing unit; and a related component design procedure control unit that checks the conformity of the element component whose representative value is changed by the subordinate changing unit according to the design rule. It has a different configuration.

[0012]

In the figure changing method in the CAD / CAM system, when the representative value of a certain element part is changed in the step of changing the representative value, the conformity of the design rule to this change is checked.

If this change is determined to be non-conforming by the design rule, the fact that the change is non-conforming is displayed on the display, and the changed value is returned to the value before the change.

When it is determined that this change complies with the design rule, it is necessary to change the representative value of the element part related to this element part. Therefore, the related element part is searched by searching the element part list. Find out.

Then, in the subsequent step, the representative value of the found component is changed according to the changed representative value.

Then, in the subsequent step, it is checked whether the changed representative value is consistent with the design rule.

When it is determined that the change is not conforming to the design rule, the fact that the change is not conforming is displayed on the display, and the changed value initially changed is returned to the value before the change.

Further, in the figure changing apparatus in the CAD / CAM system, when the representative value of a certain element part is changed by the representative value changing section, the element part design procedure control section checks the suitability of the change in the design rule. .

Then, regarding a change judged to be conforming to the design rule, an element part related to this changed element part is searched by using the related part search section.

For the retrieved element parts, the representative value is changed by using the subordinate change unit according to the representative value changed by the representative value change unit.

With respect to the element parts whose representative values have been changed, it is checked by using the related part design procedure control section whether or not there is consistency in the design rules.

[0022]

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

FIG. 1 is a block diagram showing the electrical construction of an embodiment of the present invention.

In the figure, the representative value changing unit 11 to which the output from the keyboard 20 is applied and the element part design procedure control unit 12 are bidirectionally connected. The output of the element part design procedure control unit 12 is sent to the related component search unit 13, and the output of the related component search unit 13 is given to the subordinate modification unit 14. The subordination changing unit 14 is bidirectionally connected to the related component design procedure control unit 15. Further, the output of the related component design procedure control unit 15 is the graphic element changing unit 16,
And the representative value changing unit 11.

Further, the representative value changing section 11, the element part design procedure control section 12, the related part search section 13, the subordinate change section 14, the related part design procedure control section 15, and the graphic element changing section 16 are provided.
The database 17 is composed of six lists: an assembly list 23, an element part list 24, a feature shape list 25, a graphic element list 26, an element part design knowledge list 27, and a related part design knowledge list 28.
Is connected in both directions. The output of the graphic element changing unit 16 is given to the related component searching unit 13.

The data input section 19 is supplied with an output from the database 18 in which basic shape data such as the shape of the bolt is stored and an output from the keyboard 20. Further, the output from the data input unit 19 is sent to the database 17, and the output from the database 17 is guided to the display control unit 21. Further, the display unit 22 is given an output from the display control unit 21.

Next, the six lists 2 in the database 17
The details of the configurations 3 to 28 will be described.

Assembly list 2 in database 17
As shown in FIG. 2, reference numeral 3 is a list showing a list of the assemblies in which each of a plurality of block portions used for constructing a mold to be designed is an assembly. The assemblies registered in the assembly list 23 correspond to each assembly and are subordinate lists of the element parts list 24 (24a, 24b in FIG. 2).
Has been created.

Regarding the element parts registered in the element part list 24a, the element part design knowledge list 27 (indicated by 27a, 27b and 27c in FIG. 2) and the graphic element list 26 (in FIG. 2) are provided for each element part. 26a) or the feature shape list 25 (25a, 25 in FIG. 2).
(indicated by b) has been created. For the items 251a and 252a registered in the characteristic shape list 25, the related parts design knowledge list 28 (shown by 28a and 28b in FIG. 2) and the graphic element list 26 are provided for each item.
(Indicated by 26b and 26c in FIG. 2) have been created.

The plate A is an element part indicated by 31 in both the sectional view of FIG. 3 and the external perspective view of FIG. 4, and the data in the element part list 24 regarding the plate A is shown in FIG. The data is shown in.

In this data, the data 61 registered in the column of the upper model index is data indicating the relationship with the assembly list 23 which is the upper list, and this group of data is the assembly 1 of the assembly list 23. It has been shown to be related to.

The model index column is a column for designating the element parts designated by this group of data, and the plate A (31) is designated.

Column 6 of the element part design knowledge index
The plate A knowledge shown in 2 is data indicating a relationship with the element part design knowledge list 27b which is data to be referred to when checking the consistency on the design rule.

Column 6 of the sub model index list
The plate OA (corresponding to 31 in FIGS. 3 and 4) and [Hole-1] (corresponding to 32) shown in 3 are data indicating the relationship with the feature shape list 25a which is a lower list.

The data 64 in the column of the model connection index list indicates other element parts connected to the plate A (31), the plate B (34) and the bolt A (3).
3) and are connected to the plate A.

In the column showing the function attribute, the plate A
(Reference coordinate) column 65, which is data indicating the position of the reference point P1 of (31), [Direction] column 66, which is data indicating the mounting direction of the plate A (31), and plate A (3
[Thickness] column 67 showing the thickness T1 of the shape of 1),
A [width × depth] column 68 indicating the width W1 and the depth D1 is provided, and a corresponding value is stored as a representative value in each column.

The data in the element part design knowledge list 27b provided to show the design rule of the plate A is data indicating that the design knowledge of the plate A is the knowledge of the plate A. The data in the element part design knowledge list 27 indicating the knowledge is the data shown in FIG.

In this data, the data of the plate A shown in the column of the upper model index is the data showing the relationship with the element parts list 24 which is the upper list.

The data of the plate A knowledge in the column of the element part design knowledge index is the element part design knowledge list 2
It is shown that this group of data in 7 indicates the Plate A knowledge itself.

In the column showing the design knowledge, the plate A is
There are provided a data column indicating the thickness limit, a data column indicating the width limit, and a data column indicating the depth limit, and corresponding values are stored as representative values in each column.

Further, the data in the characteristic shape list 25a provided for showing the details of the shape of the plate A shows that the plate A is the plate OA (31) which is the plate body and the holes (32 formed in this plate OA. ) And the plate OA.
The data in the characteristic shape list 25 that indicates is the data shown in FIG.

In this data, the data of the plate A shown in the column of the upper model index is the data showing the relationship with the element parts list 24 which is the upper list.

The data of the plate OA in the column of the sub-model index indicates that this group of data in the characteristic shape list 25 indicates the plate OA itself, and the related parts design knowledge index list is in the lower order. It is data indicating the relationship with the related part design knowledge list 28a, which is a list. The data [5] in the column 69 of the element index list is data indicating the relationship with the graphic element list 26a, which is a lower list.

In the column indicating the function attribute, corresponding values (the same as the value indicating the plate A in the element parts list 24a) are stored as representative values.

The data indicating [hole-1] in the characteristic shape list 25 is the data shown in FIG.
The data is the data showing the details of the [hole] indicated by 32 in FIGS. 3 and 4 and the shape thereof is shown in FIG. 5 (the representative value is stored in the function attribute column).

The plate OA in the characteristic shape list 25
The data in the related component design knowledge list 28 (indicated by 28a in FIG. 2) designated as the lower list by the design procedure index list of is the data shown in FIG.

A characteristic shape list 25 indicating [hole-1]
The related part design knowledge list 28 corresponding to the data in the table has the same data structure.

The plate OA in the characteristic shape list 25
The data in the graphic element list 26 (indicated by 26b in FIG. 2) designated as the lower list by the element index list of is the data shown in FIG.

In these data, these graphic element lists are related to the characteristic shape list 25, which is an upper list, by the data 71 registered in the element index column. The plate OA is defined in a state in which the figure is decomposed for each [solid] by the data registered in the element type column and the shape definition data column of these figure element lists. The graphic element list 26 corresponding to the data in the characteristic shape list 25 indicating [hole-1] has the same data structure as the above.

The bolt A (indicated by 33 in FIG. 3) in the element parts list 24a in FIG. 2 is indicated by the data shown in FIG. That is, the [reference coordinate] column 72 is data (see FIG. 13) indicating the position of the reference point P2 of the bolt A (33), and the [direction] column 73 is the bolt A (33).
The data indicating the direction of (33), the column 74 of [Length] is the data indicating the length L2 from the lower end of the bolt head 333 to the tip of the screw portion 331 (in FIG. 3, the thickness T1 is the screwing depth). Value), and the [nominal diameter] column 75 shows the screw part 3
The data showing the diameter of 31, the column 76 of [bolt head length] shows the data of the length H2 of the bolt head 333, and the column 77 of [bolt type] shows that a hexagonal hole is formed in the bolt value 333. It is data, and the representative value corresponding to each is stored in each column.

The data of the design knowledge list 27a corresponding to the bolt A in FIG. 2 is the data shown in FIG.

The data of the graphic element list 16a corresponding to the bolt A of FIG. 2 corresponds to the contents registered in the above-mentioned element index, and the data shown in FIGS.
The other data is omitted in the figure.

FIG. 18 is a flow chart showing the operation of the main part. The operation of one embodiment of the present invention will be described below with reference to FIG.

Corresponding to the designed mold, various types of lists 23 to 28 can be obtained by inputting a representative value or the like from the keyboard 20 via the data input section 19 while referring to the data stored in the database 18. The database 15
(Step S11).

After designing the mold by creating this data, when it becomes necessary to change the mold,
Data corresponding to the change (data including the representative value) is input from the keyboard 20.

The representative value input at this time is the plate A
It is assumed that the data is for changing the thickness of (31) (FIG. 3).
reference).

The representative value changing unit 11 to which the data instructing the change is guided searches the element parts list 24 for the list shown in FIG. 6, and the thickness column 67 belonging to the function attribute of the found list. The representative value T1 of is changed to a new value T3. Further, the element part design means control unit 12
Is notified that the thickness column 67 of the list shown in FIG. 6 has been changed (step S12).

The element part design procedure control unit 12 notified of this change refers to the element part design knowledge index list of the list (see FIG. 6) corresponding to the plate A of the element part list 24a, and thereby, the element related to the plate A. By searching the part design knowledge list and referring to the found list, it is checked whether or not this change is consistent with the design rule.

If they are not consistent, whether or not to continue designing is sent to the display unit 22 and displayed there. Therefore, the designer inputs from the keyboard 20 whether or not to continue the design.

When the designer inputs that the design is finished,
Notify the representative value changing unit 11 that the design is finished. The representative value changing unit 11 notified of this instruction returns the changed data to the value before the change, and then ends the operation related to the change of the representative value.

When the designer inputs that the design is to be continued, the representative value changing unit 11 is informed that the design is to be continued.
The representative value changing unit 11 notified of this instruction returns the changed data to the value before the change. Then, the designer continues this operation by inputting a new changed value.

If they are consistent, the related component search unit 13 is notified that the thickness column 67 of the list shown in FIG. 6 has been changed (steps S13, S14, S1).
5).

Relevant parts search unit 13 notified of this change
First finds the plate OA by searching the sub model index list of the list (see FIG. 6) corresponding to the plate A of the element parts list 24a. Then, the subordination changing unit 14 is notified that the plate OA has been found (steps S16, S17, S18).

The subordination changing unit 14 to which this notification is given
Changes the representative value T1 in the function attribute thickness column 70 of the data list (see FIG. 8) corresponding to the plate OA of the characteristic shape list 25a to a new representative value T3, and The related part design procedure control unit is notified (step S19).

The related part design procedure control unit 15 informed of this change searches the related part design knowledge list regarding the plate OA by referring to the related part design knowledge index list of the data list shown in FIG. 8, and the found list. Check whether this change is consistent with the design rules by referring to.

If they are not consistent, whether or not to continue designing is sent to the display unit 22 and displayed there. Therefore, the designer inputs from the keyboard 20 whether or not to continue the design.

When the designer inputs that the design is finished,
Notify the representative value changing unit 11 and the dependent changing unit 14 that the design is finished. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change, and then terminate the operation related to the change of the representative value.

When the designer inputs that the design is to be continued, the representative value changing unit 11 and the dependent changing unit 14 are informed that the design is to be continued. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change. Then, the designer continues this operation by inputting a new changed value.

If they are consistent, the graphic element changing section 16 is informed of this change (step S2).
0, S21, S22).

Therefore, the graphic element changing unit 16 refers to the element index list column 69 of the data list shown in FIG. 8 to obtain the shape definition data of the graphic element list (FIG. 11) showing the graphic elements indicating the plate OA. When the change is made and the change is completed, the related part search unit 13 is notified of the change (step S23).

Next, the related parts searching unit 13 again returns to FIG.
The column 63 of the sub-model index list of the data list shown in (1) is searched to inform the subordination changing unit 14 that [hole-1] has been found (steps S16, S17,
S18).

Therefore, the subordination changing unit 14 sets the representative value h2 in the column 81 of the length of the function attribute of the data list (FIG. 10) corresponding to [hole-1].

[0073]

## EQU1 ## The representative value h3 is changed to h3 = T3-h1 and the related part design procedure control unit 15 is notified that the representative value of the data list shown in FIG. 10 has been changed (step S19).

The related component design procedure control unit 15 notified of this change refers to the related component design knowledge index list of the data list shown in FIG.
By searching the related part design knowledge list for and referring to the found list, it is checked whether or not this change is consistent with the design rule.

When the consistency is not obtained, whether or not the design is continued is sent to the display unit 22 and displayed there. Therefore, the designer inputs from the keyboard 20 whether or not to continue the design.

When the designer inputs that the design is finished,
Notify the representative value changing unit 11 and the dependent changing unit 14 that the design is finished. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change, and then terminate the operation related to the change of the representative value.

When the designer inputs to continue the design, the representative value changing unit 11 and the subordinate changing unit 14 are informed that the design is to be continued. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change. Then, the designer continues this operation by inputting a new changed value.

If they are consistent, the graphic element changing section 16 is informed of this change (step S2).
0, S21, S22).

Therefore, the graphic element changing unit 16 refers to the element index list column 82 of the data list shown in FIG. 10 to refer to the graphic element list showing the graphic element indicating [hole-1] (not shown). After changing each shape definition data of (Yes), the completion of the change is notified to the related component search unit 13 (step S23).

Relevant parts search unit 1 that received this notification
3 starts the search of the model connection index list because the search of the sub model index list has already been completed, so that the plate B (34 in FIG. 3) is started.
Find out. However, the plate B is an element part connected to the plate A, but is an element part not related to the change of the representative value performed on the plate A. Therefore, after proceeding the operation with steps S16, S17 and S18, Returning to step S16 again, the model connection index list is searched again. Then, the bolt A is searched (step S16).

Since the bolt A is an element part related to the change of the representative value of the plate A, the dependent change unit 14 is notified that the bolt A is found (step S).
17, S18).

The subordination changing unit 14 changes the representative value of the length 74 of the function attribute of the data list (FIG. 12) showing the bolt A to the new representative value L3, and the change is made. Is notified to the related component design procedure control unit 15 (step S19).

The related part design procedure control unit 15 notified of this change searches the element part design knowledge list for the bolt A by referring to the element part design knowledge index list of the data list shown in FIG. 12, and the searched list. Check whether this change is consistent with the design rules by referring to.

When the matching is not achieved, whether or not the design is continued is sent to the display unit 22 and displayed there. Therefore, the designer inputs from the keyboard 20 whether or not to continue the design.

When the designer inputs that the design is finished,
Notify the representative value changing unit 11 and the dependent changing unit 14 that the design is finished. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change, and then terminate the operation related to the change of the representative value.

When the designer inputs to continue the design, the representative value changing unit 11 and the subordinate changing unit 14 are notified that the design is to be continued. The representative value changing unit 11 and the subordinate changing unit 14 notified of this instruction return all the changed data to the values before the change. Then, the designer continues this operation by inputting a new changed value.

If they are consistent, the graphic element changing unit 16 is informed of this change (step S2).
0, S21, S22).

Graphic element changing unit 1 given this notification
6 changes the data list indicating the graphic element related to the length of this bottle A by searching the element index column 83 of the data list shown in FIG. The parts search unit 13 is notified (step S23).

Related parts search unit 1 given this notification
In No. 2, the model connection index list is searched again, but since there is no data to be searched, the operation is ended at the time when the process proceeds from step S16 to step S17.

Next, the display operation shown in step S24 is started. During this operation, the display control unit 21 reads the graphic elements corresponding to all the element parts of the assembly 1 from the database 17, sends them to the display unit 22 and displays them. That is, a graphic showing the assembly 1 in which the thickness of the plate A has been changed is displayed on the display unit 22.

When the operation relating to the change of the thickness which is the representative value of the plate A is completed and the other representative values are continuously changed, the same operation as described above is repeated. When the representative value of one element part is changed, it is determined whether the change is consistent with the design rule. If they are not consistent, the change is suspended and the changed value is returned to the value before the change. If there is consistency, it is determined whether the representative values of other element parts related to the modification are also modified, and whether the modification is consistent with the design rule. Similarly, when the consistency is not obtained, the changed value is returned to the value before the change, and when the consistency is obtained, the representative values of other element parts related to the change are also changed. Then, when the change of all the element parts related to the change is completed, the graphic corresponding to the change is displayed on the display unit 22.

In the present embodiment, the case where the device indicated by the assembly list 23 is a mold has been described, but the same can be applied to other devices.

[0093]

INDUSTRIAL APPLICABILITY In the present invention, the CAD / CAM
A hierarchy in which each of the assemblies is represented in the system by an element parts list that indicates a set of element parts whose respective shapes are indicated by representative values, and each of the element parts is expressed by a graphic element list that indicates a set of graphic elements. The data structure is adopted, and in the figure changing method in this system, as a step following the step of changing the representative value of the element part, a step of searching for an element part related to the element part having the changed representative value is provided. The representative value of the element part searched in this step is changed according to the changed representative value.The figure changing device in the system has a representative value changing unit for changing the representative value of the element part, A representative of the found element parts with a related part search part that searches for element parts related to the element parts whose values have been changed. Since the subordinate change unit changes the representative value of one element part, the representative value of the element part related to the change is automatically changed. There is an effect that it becomes possible to easily fix the. Further, in the present invention, since the CAD / CAM system is provided with the element part design procedure control section and the related part design procedure control section, it is configured to judge whether the change of the representative value is consistent with the design rule. It is possible to prevent an erroneous design from being performed and to perform an appropriate design with consistency.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an outline of an assembly list, an element part list, a feature shape list, a graphic element list, an element part design knowledge list, and a related part design knowledge list, which are configured in a database, and their mutual relationships.

FIG. 3 is a cross-sectional view showing details of the assembly 1.

FIG. 4 is an external perspective view showing a plate A.

FIG. 5 is an explanatory diagram showing an outline of [hole-1].

FIG. 6 is a data list showing a plate A configured in the element parts list.

FIG. 7 is a data list showing plate A knowledge configured in the element part design knowledge list.

FIG. 8 is a data list showing the plates OA configured in the feature shape list.

FIG. 9 is a data list showing plate OA knowledge configured in a related part design knowledge list.

FIG. 10 is a data list showing [Hole-1] formed in the feature shape list.

FIG. 11: Plate OA configured in graphic element list
It is a data list which shows the graphic element of.

FIG. 12 is a data list showing bolts A configured in the element parts list.

FIG. 13 is an explanatory diagram showing an outline of a bolt A.

FIG. 14 is a data list showing the bolt A knowledge configured in the related part design knowledge list.

FIG. 15 is a data list showing graphic elements of bolt A formed in the graphic element list.

FIG. 16 is a data list showing graphic elements of bolt A configured in the graphic element list.

FIG. 17 is a data list showing graphic elements of bolt A formed in the graphic element list.

FIG. 18 is a flowchart showing an operation of a main part.

[Explanation of symbols]

11 representative value change section 12 element part design procedure control section 13 related part search section 14 dependent change section 15 related part design procedure control section 16 graphic element change section 22 element part list 24 graphic element list S12 process of changing representative value S13 representative First step of checking suitability of the element component whose value has been changed on the design rule S16 Step of searching for an element component related to the element component of which the representative value has been changed S19 Changing the representative value of the searched element component Step S20 Second step of checking the conformity of the design rule of the element component whose representative value has been changed

Claims (2)

[Claims] 1. An assembly is represented by an element parts list that indicates a set of element parts whose respective shapes are represented by representative values, and each of the element parts is expressed by a graphic element list that indicates a set of graphic elements. In the CAD / CAM system described above, the step of changing the representative value of the element part, and the first step of checking the conformity in the design rule of the element part whose representative value is changed by the step of changing the representative value. If the rule conformity determination in the first step determines that the rule is non-conforming, the fact that the rule is non-conforming is displayed on the display, the changed value is returned to the value before the change, and the representative value is changed by the step of changing the representative value. The step of searching the element parts related to the element parts whose values are changed, and the representative value of the element parts searched in this step The step of changing the representative value according to the specified representative value, the second step of checking the conformity in the design rule of the element component whose representative value is changed by the step of changing the representative value, and the rule conformity by the second step. If it is determined to be non-conforming by the determination, a step of displaying the non-conformity on the display and returning the changed value changed by the first step and the second step to the value before the change is provided. A method for changing a figure in a CAD / CAM system. 2. An assembly is represented by an element part list that indicates a set of element parts whose respective shapes are represented by a representative value, and each of the element parts is expressed by a graphic element list that indicates a set of graphic elements. In the CAD / CAM system described above, a representative value changing section for changing the representative value of the element part, and an element part designing procedure for checking compatibility of the element part whose representative value is changed by the representative value changing section in the design rule. The control unit, a related component search unit that searches for an element component related to the element component whose representative value is changed by the representative value changing unit, and a representative value of the element component searched by the related component search unit for the representative value. The subordinate change unit that changes according to the representative value changed by the value change unit and the component parts whose representative value is changed by this subordinate change unit Graphic changing device in a CAD / CAM system, characterized in that a relevant part design procedure control unit to examine the compatibility of the rules.