JPH10124559A - Simple display method for cad drawing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To validly prevent a line segment to be displayed from being thinned out or an unnecessary line segment from being displayed in a schematic diagram by displaying or eliminating the line segment in a line kind corresponding to the hierarchy of the parts in the schematic diagram based on definition when the line kind can be changed. SOLUTION: An assembly diagram re-definition processing is selected (a step 6), the data of a part diagram related with the assembly diagram are called from an assembly diagram data file in a storage device (a step 7), and a thinning-out processing is executed based on the attribute and the hierarchy of the parts in the assembly diagram (a step 8). Then, the re-defined assembly diagram is displayed on the screen of the screen display device of a CAD system (a step 9). Also, the elimination of the part is operated corresponding to the hierarchy of the parts in the schematic diagram in a step for display. Thus, graphic data amounts to be handled at the time of displaying the schematic diagram can be reduced, the responsibility of drawing preparation, drawing edition, and drawing display or the like can be improved, and workability can be made satisfactory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simplified display method suitable for use in a computer-aided design (CAD) system when a plurality of parts are simply displayed on a screen or on paper in a schematic diagram by using a schematic diagram. It is.

[0002]

2. Description of the Related Art As a conventional simple display method, a method disclosed in Japanese Patent Application Laid-Open No. HEI 3-211675 is known. In this method, the entire display screen is balanced. In order to perform good thinning display, the display screen is divided into multiple blocks in advance,
The display priority of the thinning target graphics included in each block is determined in the order of the length of the line segment, and the display priority of the thinning target graphics in each block is set at the time of screen display. A fixed number is displayed in descending order.

However, in this method, since the display priority is determined by the length of the line segment, depending on the purpose of thinning, a line segment that needs to be displayed may be thinned out or an unnecessary line segment may be displayed. In some cases, figures cannot be properly thinned out.

As a conventional simple display method, a method disclosed in Japanese Patent Application Laid-Open No. 4-60772 is also known. In this method, a screen is stained due to crushing of a fine portion when a drawing is reduced and displayed. In order to prevent the problem, the shapes of the parts etc. in the original drawing are registered in advance in simplified form according to the scale, and when the screen is displayed, the simplified figure corresponding to the specified scale is displayed. You are going to.

In this method, however, it takes time and effort to prepare simplified figures for each scale for each figure such as a part, and this is particularly significant when the shape of the part is not standardized. This is important because it requires a lot of man-hours.

[0006] Another problem common to the above two conventional methods is that when figures are not properly thinned out when creating a schematic diagram showing a large area such as a factory layout drawing, the amount of figure data to be handled becomes large. There is a problem that responsiveness of drawing creation, drawing editing, screen display, etc. is reduced, and workability is deteriorated.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a simplified display method which advantageously solves the above-mentioned problems, and a simplified display method of a CAD drawing according to the present invention is provided in a CAD system. After defining a plurality of parts by a detailed view, when simply displaying at least a part of the plurality of parts by a schematic diagram of one or more stages, when defining the plurality of parts by the detailed view, each of the parts In addition to defining whether or not the line type can be changed, in the case where the line type can be changed, one or two or more line types respectively corresponding to a plurality of hierarchies and the case of erasure are defined, and the one or more stages are defined. At the time of displaying the at least some parts in the schematic diagram at a predetermined stage in the schematic diagram, if the line type of each of the plurality of components is not changeable, the line type at the time of definition is displayed If the line type can be changed on the basis of the definition to display a line species corresponding to the hierarchy of the components in the schematic diagram, or is characterized in that peripheral.

In the present invention, when a plurality of parts are defined according to the detailed view, it is defined whether or not the display line type can be changed for each component of at least one of the plurality of parts. With, in the case of being changeable, one or two or more line types respectively corresponding to a plurality of hierarchies and a case of deletion are defined, and when displaying the at least some parts according to the schematic diagram of the predetermined stage, For each of the constituent elements of the one or more parts, if the line type is not changeable, the line type at the time of definition is displayed, and if the line type is changeable, the schematic diagram is displayed based on the definition. May be displayed or deleted with the line type corresponding to the part hierarchy of the part.

In the present invention, the hierarchy of each part in the schematic diagram of the predetermined stage is represented by a Z value defined for the part (based on the assumption that the viewpoint of viewing the drawing is located above the reference plane, A value indicating the position of the part in the height direction from above).
It may be determined according to the magnification at which the part is displayed.

[0010]

According to the simplified display method of the present invention, in a CAD system, after a plurality of parts are defined by detailed drawings, at least a part of the plurality of parts is outlined in one or more stages. At the time of simplified display by the figure, when defining a plurality of parts according to the detailed view,
For each of the parts, it is defined whether or not the line type can be changed, and in the case where the line type can be changed, one or more line types corresponding to a plurality of layers and the case of deletion are defined, and Alternatively, when the at least some parts are displayed according to the outline diagram of a predetermined stage among the outline diagrams of a plurality of stages, if the line type of each of the plurality of components is not changeable, the line type at the time of definition is displayed. If the line type can be changed, the line type is displayed or deleted according to the definition in the schematic diagram based on the definition.

Therefore, according to the method of the present invention, a part defined by a detailed view is automatically assigned to one of the parts in the schematic view at a predetermined stage based on the definition when the line type is changeable. Alternatively, a line type selected from two or more line types can be displayed in the outline diagram or can be thinned out from the outline diagram. When defining the case of elimination and deletion, the line type can be changed or disabled according to the purpose of thinning out in the outline diagram, and if the line type can be changed, the hierarchy can be set appropriately. For example, a unit device diagram showing a unit device configured by combining a plurality of parts, and a station assembly showing a station assembly of each processing station configured by combining a plurality of unit devices. Diagram, a machine layout diagram showing the arrangement status of multiple station assemblies on the production line, a line layout diagram showing the arrangement status of multiple lines in the factory, and a factory layout of each facility including these multiple lines In a schematic diagram of each stage such as a factory layout diagram showing the arrangement state in the above, it is possible to effectively prevent the line segments that need to be displayed from being thinned out or unnecessary line segments from being displayed. It should be noted that the relationship between the schematic diagram and the detailed diagram in the present invention is not an absolute one but a relative one, and the parts here are not limited to the parts of the apparatus. Can also be considered as
In this case, the present invention can be applied to a case in which a machine layout diagram of a production line is used as a schematic diagram and a unit device diagram showing the unit devices of the production line is used as a detailed diagram.

Further, according to the present invention, the parts are also deleted in accordance with the hierarchy of the parts in the schematic diagram at the stage of displaying, so that the amount of graphic data to be handled when displaying the schematic diagram can be reduced. Improve responsiveness of creation, drawing editing, screen display, etc., and improve workability,
In addition, since it is not necessary to separately create and save graphic data for the outline drawing and the detailed drawing, only the outline drawing including the detailed drawing is required, so that it is possible to reduce the trouble of creating the graphic data and save the drawing data. The amount of graphic data can also be reduced.

In the present invention, when defining a plurality of parts according to the detailed view, it is defined whether or not the display line type can be changed for each component of at least one of the plurality of parts. With, in the case of being changeable, one or two or more line types respectively corresponding to a plurality of hierarchies and a case of deletion are defined, and when displaying the at least some parts according to the schematic diagram of the predetermined stage, For each of the constituent elements of the one or more parts, if the line type is not changeable, the line type at the time of definition is displayed, and if the line type is changeable, the schematic diagram is displayed based on the definition. If you want to display or delete the line type corresponding to the part's hierarchy in, you can change or delete the line type for only a part of the part if necessary, so change the line type , Shadow the erasure And obtained by applying the process, it is possible to look in the overview diagram comprising a number of parts made excellent.

In the present invention, if the hierarchy of each part in the schematic diagram of the predetermined stage is determined according to the Z value defined for the part, the overlapping part of a plurality of parts is hidden line processed. Can be done,
Depending on the stage of the schematic diagram, the degree of the hidden line processing can be varied including the case of erasure, while the hierarchy of each component in the schematic diagram is determined according to the magnification at which the component is displayed. For example, when only a specific part in the schematic diagram is displayed in an enlarged manner, the line type of the component can be changed to correspond to the enlarged scale, for example, by returning it to a solid line. Can be pulled out and displayed, and the detailed view of the part there can be corrected from the display state of the schematic view.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings using embodiments. Here, FIG. 1 shows a schematic configuration of a CAD system used for implementing an embodiment of a simplified CAD drawing display method of the present invention,
This system includes a central processing unit A for performing calculations and the like for graphic processing, and a ROM, a RAM, and a hard disk drive connected to the central processing unit for storing an operation program and data such as numerical values to be processed by the operation program. , Storage device B such as floppy disk drive
And a screen display device C for displaying a created graphic on a screen such as a CRT, a keyboard D for inputting data based on key operations, and a mouse E for inputting data based on moving operations. The method of this embodiment described below can be implemented in the CAD system by modifying the operation program of the CAD system by a usual method.

FIG. 2 is a flowchart showing a processing procedure for implementing the simplified display method of this embodiment. In this embodiment, an assembly drawing of an arbitrary device is created as a schematic diagram, and the detailed drawing is shown. A part diagram showing parts of the apparatus is to be created. Here, FIG. 2A shows a processing procedure when creating the assembly drawing, and FIG.
Shows a processing procedure for displaying the assembly drawing.

When an assembly drawing is created by the method of this embodiment shown in FIG. 2, a mouse E on the screen of the screen display device C of the CAD system is first used in step 1 in FIG.
A process for creating an assembly drawing is selected by a picking operation using a keyboard or an input from a keyboard D of the system, and then, in step 2, a plurality of components to be included in the apparatus drawn in the assembly drawing and their respective configurations While defining the elements (including the hierarchical values in the assembly drawing), an assembly drawing (usually a three-view drawing) of the device is created, and in the following step 3, for each of the above components, for example, as shown in Table 1 below Attribute,
In the next step 4, a part drawing (also usually a three-view drawing) is created for each part previously defined in step 2, and finally in step 5, the data of the assembly drawing is stored in the The data including the part drawing data and the arrangement data of the part in the assembly drawing are stored in the assembly drawing data file in the storage device B of the CAD system. Instead of the above procedure, a component drawing of each component is created first, attributes are added to the components of the component, and the components are combined in a predetermined arrangement to create an assembly drawing. In such a case, a common attribute may be added collectively to a plurality of constituent elements in each component.

[0018]

[Table 1]

Here, Table 1 will be described. Table 1 shows an example of attributes added to two types of bolts, in which the components of each bolt are represented by a head, a screw portion (shaft portion). And a central axis line, and for each of these constituent elements, two types of attributes (a line type can be maintained or a line type can be changed) when the attribute flag is ON and an attribute (layer setting value) for a layer are added in combination. ing. Here, the constituent elements to which the attribute of maintaining the line type when the attribute flag is ON are thinned out (deleted) regardless of the magnitude relationship between the hierarchy setting value and the hierarchy value in the assembly drawing when the attribute flag is ON. ) The component which is not processed, the line type at the time of definition is maintained, and the attribute to which the line type can be changed when the attribute flag is ON is added to the hierarchy setting value and the assembly drawing when the attribute flag is ON. The line type is maintained or thinned out (deleted) based on the magnitude relationship with the hierarchical value of. When the attribute flag is in the OFF state, any component is subjected to line type maintenance or thinning (deletion) processing based on the magnitude relationship between the hierarchy setting value and the hierarchy value in the assembly drawing.

In this embodiment, in the default state (instruction not input state), such an attribute flag is set to ON, and the attribute when the attribute flag is ON is determined to be line type maintenance. In step 3, the default state of each component is maintained, the line type maintenance setting is switched to the line type changeable, the attribute flag is switched to the OFF state, and the hierarchy is deleted. By changing the setting value,
Desired attributes can be added. Therefore, for example, if the attribute flag is set to ON with the attribute maintained for the line type for the component to be displayed in particular, the component can be displayed in the assembly drawing regardless of the hierarchical value when the assembly drawing is displayed. , And set the attribute flag to O
If it is set to FF, the constituent elements can be thinned out according to the hierarchical value when displaying the assembly drawing. In Table 1 above, the attributes when the attribute flag is ON are set to bolts.
In F1, head type can be maintained, screw part can be changed in line type, center axis can be maintained in line type, and in bolt F2, head can be changed in line type, thread can also be changed in line type, center axis can be changed The line type is maintained. On the other hand, the hierarchy setting value is 0 and 1 for line type maintenance and 2 or more for erasure for each component.

FIG. 3 shows the display states of the bolts F1 and F2 in the assembly drawing based on the attributes shown in Table 1 above.
As shown in FIG. 3 (a), when the attribute flag is ON for all the constituent elements, when the hierarchical value in the assembly drawing is 0, the head and the screw portion are displayed as solid lines as they were when they were created. When the center axis is indicated by a dashed line and the hierarchical value in the assembly drawing is 2, only the thread portion whose line type can be changed is deleted. When the attribute flag is OFF except for the central axis, when the hierarchical value in the assembly drawing is 0, the head and the screw are displayed as solid lines and the central axis is displayed as a chain line as in the case where the attribute flag is ON. However, when the hierarchical value in the assembly drawing is 2, the head and the screw portion are deleted and only the center axis is displayed as it is.

On the other hand, the bolt F2 is shown in FIG.
As shown in the figure, when the attribute flag is ON for all the constituent elements, when the hierarchical value in the assembly drawing is 0, the head and the screw part are displayed as solid lines as they are at the time of creation, and the central axis is displayed as a chain line. When the hierarchical value in the assembly drawing is 2, the head and the screw portion whose line type can be changed are deleted and only the center axis is displayed as it is.
When the attribute flag is OFF except for the central axis, when the hierarchical value in the assembly drawing is 0, the head and the screw are displayed as solid lines and the central axis is displayed as a chain line as in the case where the attribute flag is ON. However, when the hierarchical value in the assembly drawing is 2, the head and the screw portion are deleted and only the center axis is displayed as it is.

After the assembly drawing is created as described above, FIG.
When displaying an assembly drawing by the method of this embodiment shown in FIG.
(B) In step 6, the assembly drawing redefinition process is selected by the same operation as in step 1, and in the next step 7, the data of the part drawing related to the assembly drawing is stored in the assembly drawing data in the storage device B. Called from a file, followed by step 8,
A thinning-out process is performed as shown in FIG. 3 based on the attribute added in step 3 above and the hierarchy of parts in the assembly drawing. It is displayed on the screen of the screen display device C. In this decimation process, the display speed may be increased by performing only the data deletion pattern for deleting the data not to be displayed. However, in addition to the data deletion pattern, the display may be performed as a user option of the CAD system. A temporary data erasing pattern for storing data of a part not to be stored may be set, and the temporary data erasing pattern may be used to recover the erased part as needed, although the display speed is not so increased.

When displaying the assembly drawing after correcting the created part drawing, first, the step shown in FIG.
In step 10, the part drawing correction and assembly drawing redefinition processing are selected by the same operation as in step 1, and in the next step 11, the data of the part drawing to be corrected is called from the assembly drawing data file in the storage device B. In the following step 12, the called part drawing is corrected, and in the next step 13, another part drawing related to the assembly drawing is additionally called, and thereafter, the process proceeds to the step 8, and the step The thinning process is performed based on the attribute added in step 3 or modified in step 12 and the component hierarchy in the assembly drawing.
The redefined assembly drawing is displayed on the screen of the screen display device C of the CAD system in the last step 9.

Further, when the created assembly drawing is displayed and a part drawing created above is displayed in a part of the assembly drawing, first, in step 14 in FIG. The upper part drawing display processing is selected, and in the next step 15, the screen display device C of the CAD system is used.
Is displayed on the screen of the CAD system, and in the subsequent step 16, the screen display device C of the CAD system is displayed.
The part drawing data calling range is designated by designating the range using the mouse E on the screen of FIG. 5 or inputting the part name from the keyboard D of the same system. In the final step 17, the parts in the designated range (for example, specifying Is changed to the detail of the part drawing as it is on the scale of the assembly drawing, and the assembly drawing is displayed again.

FIG. 4 shows another embodiment of the simplified display method of the present invention. In this embodiment, similarly to the method of the previous embodiment, the lowermost plant layout diagram is changed to the lowermost one. A five-step outline drawing up to the unit device drawing (for machine layouts other than the unit device, etc., since the side view and front view are less important, only the plan view is used here), and the display state between these outline drawings , For example, from the display state of the machine layout diagram M as shown in FIG.
In order to shift to the display state of 1, U2, attributes are added to the components of each component so that the display state is as shown in Table 2 below, and a hierarchical value is set in each figure.

[0027]

[Table 2]

That is, here, a unit device diagram showing a unit device constituted by combining a plurality of parts, a station assembly diagram showing a station assembly of each processing station constituted by combining a plurality of unit devices, and a plurality of units on a production line are shown. Outlines a machine layout diagram showing the station assembly layout status, a line layout diagram showing the layout status of multiple lines in the factory, and a factory layout diagram showing the layout status of each facility including the multiple lines in the factory. In addition to creating a drawing, create a detailed drawing of the parts that show the components that make up each unit, and reduce the hierarchical values of those drawings from the unit equipment drawing to the factory layout drawing in the above order with the parts drawing being the maximum. Set as follows. Note that a Z value (a value indicating the height direction position of the part or device from the reference plane, assuming that the viewpoint of viewing the drawing is located above the reference plane) is set for each component or device. If so, the Z value may be used for setting such a hierarchical value,
In that case, the higher the Z value, the smaller the hierarchical value.

As shown in Table 2, with the above settings, only the machine layout is displayed in the factory layout diagram and the line layout diagram, and the station assembly, unit devices and parts thereof are deleted, and in the machine layout diagram M, As shown in the upper part of FIG. 4, it is possible to provide a display state in which only the appearance (contour) diagram of each station assembly is displayed and the unit device and its parts are deleted. For example, as shown by a frame R in FIG. 4, if a desired range is designated while the machine layout diagram M is displayed, and an enlarged display within the range is indicated, the original machine layout diagram is displayed. As described above, since all of the unit drawing data includes all the part drawing data as described above, the unit drawing U1, U2 of all the unit devices included in the specified range is used by using the data of the part drawing. As shown in the lower part of FIG. 4, it is possible to enlarge and display the entire screen in place of the machine layout diagram described above.
Operability of the D system can be improved.

Table 3 below shows a further embodiment of the simplified display method of the present invention. As shown in Table 3, in general, the hierarchical value is set according to the magnification of the drawing corresponding to each of the above-mentioned drawings. May be set to turn the display ON and OFF. In this case, the same effect as in the above embodiment can be obtained. In addition, according to this embodiment, for example, when the operation dial is attached to the CAD system, the display position is changed first by using the operation dial after designating the focal position. The display states from the machine layout diagram as shown in FIG. 4 to the station assembly diagram of the station assembly located at the focal position, the unit device diagram of the unit device located at the focal position, and the component diagram of the component located at the focal position are shown. Since it can be changed continuously, and even a part extension element which is a component of the part can be displayed in the part drawing, the operability of the CAD system when viewing the drawing can be further enhanced.

[0031]

[Table 3]

FIG. 5 shows still another embodiment of the simplified display method according to the present invention. In this embodiment, hidden line processing is performed using attributes assigned to each component of a part. That is, here, first, in step 21, in preparation for drawing an assembly drawing as a schematic drawing, a line type to be used is selected, and an attribute (line type maintenance or line type) set in advance in the default state when the attribute flag is ON is set. The type can be changed) and the attribute for the layer (layer setting value) is changed as necessary, for example, the attribute is set as shown in Table 4 below, or the attribute flag in the ON state is changed to OFF as necessary. Perform the operation you want. In this embodiment, the attribute flag O
The processing by N and OFF is performed in the same manner as in the previous embodiment.

[0033]

[Table 4]

In Table 4 above, the attributes when the attribute flag is ON are such that the bolt F3 maintains the line type for the head, the line type can be changed for the screw portion, the line type is maintained for the center axis, and the bolt F4 has the attribute The head can change the line type, the thread can also change the line type, and the center axis line is the line type maintenance. On the other hand, the hierarchy setting value is 0 for the line type maintenance and 1 to 3 for the broken line for each component. , And there are four or more erasures. In this way, by setting the case of the hierarchy setting values 1 to 3 as broken lines, it is possible to perform hidden line processing for displaying components having intermediate values in the assembly drawing with broken lines instead of thinning out. Therefore, it is possible to give variety to the drawing display.

Here, in the next step 22, a component diagram as a detailed drawing is drawn while defining each component by defining a component component including a line element (a central axis line or the like). In step 23, information relating to normal hidden line processing, that is, for example, Z values, colors, sheets, and the like in the hidden line processing method previously proposed by the present applicant in Japanese Patent Application Laid-Open No. 7-306957 are defined. Then, in the next step 24, the component to be hidden line processing is displayed on the screen, and in the following step 25, it is determined whether the attribute flag of the component is ON or OFF. In step 26, the hierarchy value of the component having the attribute of maintaining the line type in the assembly drawing is replaced with 0, and the process proceeds to step 27. If the attribute flag is in the OFF state in step 25, the process directly proceeds from step 25 to step 27. Proceed to.

In step 27, the hierarchical value of each component is automatically calculated from the Z value and the like (the hierarchical value decreases as the Z value increases). In the next step 28, the hierarchical value of each component in the assembly drawing is calculated. The layer value is compared with the layer setting value as an attribute. According to the comparison result, for example, if the layer value is 0, the line type is maintained;
A line type and a thinning-out (deletion) process to be displayed such as a broken line when the value is 3 and a deletion when the value is 4 or more are selected. In the last step 29, hidden line processing is executed based on the processing selection result.

FIG. 6 shows the display state of the two types of bolts F3 and F4 in the assembly drawing based on the attributes shown in Table 4 above. As shown in FIG. When the attribute flag is ON for the component of the above, when the hierarchical value in the assembly drawing is 0, the head and the screw portion are displayed as solid lines as they are at the time of creation and the center axis is displayed as a dashed line, and the hierarchy in the assembly drawing When the value is 2, the thread portion whose line type can be changed is changed to a broken line, and when the hierarchical value in the assembly drawing is 5, the thread portion whose line type can be changed is deleted. When the attribute flag is OFF except for the central axis, when the hierarchical value in the assembly drawing is 0, the head and the screw are displayed as solid lines and the central axis is displayed as a chain line as in the case where the attribute flag is ON. However, when the hierarchical value is 2 in the assembly drawing, the head and the thread are broken, and when the hierarchical value is 5 in the assembly drawing, the head and the screw are deleted and only the center axis is displayed as it is. .

On the other hand, the bolt F4 is shown in FIG.
As shown in the figure, when the attribute flag is ON for all the constituent elements, when the hierarchical value in the assembly drawing is 0, the head and the screw part are displayed as solid lines as they are at the time of creation, and the central axis is displayed as a chain line. When the hierarchy value in the assembly drawing is 2, the head and the screw portion where the line type can be changed are made into dashed lines, and when the hierarchy value in the assembly drawing is 5, the head and the screw portion where the line type can be changed are deleted. Only the central axis is displayed as it is. When the attribute flag is OFF except for the central axis, when the hierarchical value in the assembly drawing is 0, the head and the screw are displayed as solid lines and the central axis is displayed as a chain line as in the case where the attribute flag is ON. However, when the hierarchical value in the assembly drawing is 2, the head and the screw portion are made into broken lines, and the hierarchical value in the assembly drawing is 5
In the case of, the head and screw part where the line type can be changed are deleted and only the center axis is displayed as it is.

FIG. 7 is an assembly view before performing hidden line processing according to the simplified display method of this embodiment, and FIG. 8 is an assembly view after performing hidden line processing according to the simplified display method of this embodiment. As is apparent from these drawings, according to the method of this embodiment, it is possible to thin out the component components while leaving the desired components as appropriate.

Thus, according to the above embodiment, it is possible to effectively prevent the line segments that need to be displayed from being thinned out or display unnecessary line segments in the schematic diagram. The parts are also deleted according to the parts hierarchy in the outline diagram of the stage to be performed, so the amount of graphic data to be handled when displaying the outline diagram can be reduced, and the responsiveness of drawing creation, drawing editing, screen display etc. It is possible to improve the workability and improve the workability.Moreover, it is not necessary to create and save the graphic data for the schematic diagram and the detailed diagram separately, and only the schematic diagram including the detailed diagram need be used. It is possible to reduce the trouble of creating graphic data and to reduce the amount of graphic data to be stored.

Further, according to the method of the last embodiment, the line type can be changed or deleted only for some of the components of the part as necessary. Since the present invention is applied to the processing, it is possible to give variety to the display of the drawings, and it is possible to improve the appearance of the schematic diagram including a large number of components.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of a CAD system used for implementing an embodiment of a simplified CAD drawing display method of the present invention.

FIG. 2 is a flowchart showing a processing procedure for implementing the simplified display method of the embodiment.

FIG. 3 is an explanatory diagram showing display states of bolts F1 and F2 in an assembly drawing based on the attributes shown in Table 1 in the method of the embodiment.

FIG. 4 is a plan view of a machine layout and a unit device illustrating a display method of a schematic diagram of a plurality of stages in another embodiment of a simplified display method of a CAD drawing of the present invention.

FIG. 5 is a flowchart showing a processing procedure for implementing still another embodiment of the simplified CAD drawing display method of the present invention.

FIG. 6 is an explanatory diagram showing a display state of bolts F3 and F4 in an assembly drawing based on the attributes shown in Table 4 in the method of the embodiment.

FIG. 7 is an assembly view before a hidden line process is performed by the method of the embodiment.

FIG. 8 is an assembly view after performing hidden line processing by the method of the above embodiment.

[Explanation of symbols]

 A central processing unit B storage device C screen display device D keyboard E mouse F1 ~ F4 bolt M machine layout diagram U1, U2 unit device diagram

Claims (4)

[Claims] In a CAD system, after a plurality of parts are defined by a detailed view, at least a part of the plurality of parts is simplified by a schematic diagram of one or a plurality of stages. At the time of the definition, for each of the parts, define whether the line type can be changed, and, when the line type can be changed, define one or more line types corresponding to a plurality of layers and the case of deletion. A line at the time of definition if the line type is not changeable for each of the plurality of parts when the at least some of the parts are displayed according to the schematic diagram of the predetermined stage in the schematic diagram of the one or more stages. If the line type is changeable, the line type corresponding to the part hierarchy in the schematic diagram is displayed or deleted based on the definition if the line type is changeable. , Simplified method of displaying CAD drawings. 2. A method according to claim 1, wherein when defining a plurality of parts according to the detailed view, it is defined whether or not a display line type can be changed for each component of at least one of the plurality of parts. When possible, one or two or more line types respectively corresponding to a plurality of hierarchies and a case of erasure are defined, and when displaying the at least some parts according to the schematic diagram of the predetermined stage, If the line type is not changeable for each of the above-described components, the line type at the time of definition is displayed, and if the line type is changeable, the component in the schematic diagram is displayed based on the definition. 2. The simplified display method for a CAD drawing according to claim 1, wherein the display is performed by using a line type corresponding to the hierarchy of (1) or is deleted. 3. The C according to claim 1, wherein the hierarchy of each part in the schematic diagram of the predetermined stage is determined according to a Z value defined for the part.
A simplified display method for AD drawings. 4. The simplified display method of a CAD drawing according to claim 1, wherein a hierarchy of each of the parts in the schematic diagram of the predetermined stage is determined according to a magnification for displaying the parts.