JP2023115994A - Design support device, design support apparatus provided with same, and design support method - Google Patents

Abstract

An object of the present invention is to clarify design rules and the like before a designer finalizes design items to be changed, thereby improving design work efficiency. [Solution] A receiving unit that receives a first design item including various information of a design object input by a user to make changes, the first design item, and a second design item related to the first design item. a design item specifying unit that specifies a design rule that is a design rule for a design object using a first design item and a second design item; A design support device is used, which includes an output section that outputs the design rule specified by the design rule specifying section before it is set as a design item. [Selection diagram] Figure 1

Description

The present disclosure relates to a design support device, a design support apparatus including the same, and a design support method.

In the manufacturing industry, when designing a product shape, it is necessary to determine a shape that satisfies all of multiple requirements (target performance and strength, manufacturing restrictions, assembly restrictions, environmental load restrictions, maintenance restrictions, design, etc.). be. 2. Description of the Related Art Conventionally, it is known to design a product or the like on a computer using a 3D-CAD system. This design using 3D-CAD is called "3D-CAD design". Here, CAD is an abbreviation for Computer-Aided Design. Also, 3D is an abbreviation for three-dimensional.

In 3D-CAD design, it is desirable to consider design guidelines that consider manufacturability, such as ease of processing such as drilling and bending, and ease of assembly such as welding and screw fastening, which are problems during product manufacturing. . Furthermore, in 3D-CAD design, it is also desirable to consider design guidelines that consider maintainability, such as ease of inspection and ease of access to jigs, which are problems during product maintenance. These design guidelines may have tens of thousands of rules for one product, and are usually manually checked using a checklist or the like.

In Patent Document 1, in a CAD shape creation support device, work information is inherited from a design rule check 5 that checks a CAD shape model after a feature has been added by a user by referring to a feature database 3 and a design rule database 4. The shape recognition unit 6 specifies the additional position (location) of the new feature to be added to eliminate the unsatisfactory part of the design rule, and the shape model specified by the manufacturing requirements etc. at the time of creating the shape data of the three-dimensional CAD In order to satisfy the design rule of , the shape recognition of the connection state of the shapes of the features arranged on the shape model is performed, and the detailed work information required for the work of creating shape data in CAD is handed over to the work guidance unit 7 and sent to the user. In contrast, it is disclosed that, by presenting work guidance, it is possible to make appropriate shape changes in areas where the design rules are not satisfied, sufficiently preventing design rework, and improving design work efficiency. there is

JP 2010-277460 A

In the CAD shape creation support device described in Patent Document 1, as can be seen from the fact that the CAD shape model after the feature addition by the user is used, after determining the position and dimensions of the shape of the 3D-CAD model, the design Checking whether the rules are satisfied.

However, especially in the case of a designer, such as a beginner, who does not fully grasp the design rules, design problems tend to occur because the design rules to be observed are not fully grasped when adding features. Furthermore, even if the problematic part is fixed, new problems may arise, requiring iterative fixes. Therefore, if the design rule is checked after adding a feature, there is a risk that the 3D-CAD model will need to be modified in a chain reaction.

An object of the present disclosure is to clarify design rules and the like before finalizing design items to be changed by a designer, thereby improving design work efficiency.

The design support device of the present disclosure includes a design item storage unit that stores design items including various information on a design object, a reception unit that receives a first design item input by a user, and a design item stored in the design item storage unit. Using the design item identification part for identifying the second design item related to the first design item from the design items, and the first design item and the second design item, the design rule, which is the rule for designing the design object, is determined. It comprises a design rule specifying unit for specifying and an output unit for outputting the design rule.

According to the present disclosure, it is possible to clarify design rules and the like before finalizing design items to be changed by the designer, thereby improving design work efficiency.

1 is a configuration diagram showing a design support device of an embodiment; FIG. FIG. 10 is a flowchart showing an example of processing in a design rule applied existing feature extraction unit; FIG. 10 is a flowchart showing the details of step S206 of adding a feature obtained from an existing feature to a design rule-applied existing feature; FIG. 5 is a flow chart showing an example of processing in a design rule specifying unit; 4 is an enlarged view showing an example of a screen of an input/output unit; FIG. FIG. 11 is an enlarged view showing another example of the screen of the input/output unit; It is a block diagram which shows the design support apparatus of a modification (a). It is an enlarged drawing which shows an example of the screen of the input-output part of a modification (a). It is a block diagram which shows the design support apparatus of a modification (b). It is an enlarged drawing which shows an example of the screen of the input/output part of a modification (b).

In the design support device according to an embodiment of the present disclosure, after selecting the type of new feature (hole, rib, etc.), before the user determines the position and/or dimensions of the new feature, from the design rule database, Extract design rules applicable to new features. Furthermore, existing features that match the application area conditions of the extracted design rules are extracted. Among the extracted design rules, design rules applicable to the extracted existing features are identified and presented.

Here, the feature means a design item related to the shape and position of the object to be designed. Also, dimensions are defined by dimension rules. Dimension rules include the dimensions of single features, the distance between two features, the relative angles of these features, and so on.

A new feature is a feature added by the user to the 3D-CAD model, and is the feature before being stored in the design item storage unit 104 . This is before the user confirms the input of the new feature as a feature of the 3D-CAD model. An existing feature is a feature that is not subject to addition, correction, or deletion by the user to the 3D-CAD model, and is a feature stored in the design item storage unit 104 . An existing feature is also called a fixed feature included in the 3D-CAD model. Coverage conditions refer to the distance from the new feature, the entire area that is united, and so on. Here, "fixed" indicates a state in which a new feature in the state of provisional input is used as a constituent element of the 3D-CAD model. In other words, “fixed” means that the new feature is stored in the design item storage unit 104 .

The new feature is also called "first design item", and the existing feature is called "second design item".

As for design rules, for example, there is a design guideline such as "For a hole through which a bolt passes, the distance between the hole and the edge shall be equal to or greater than a standard value." Among these design guidelines, rules to be checked on the 3D-CAD model are called "design rules".

An example of the design rule is "Let the distance between the hole and the edge be 10 mm or more. The edge shall be the edge of the entire area integrated with the hole." When the user selects "hole", the design rule for the new feature hole is extracted from the design rule database.

Next, from the design rule, "the edge in the entire area integrated with the hole" is extracted as the applicable area condition, and all the "edge" features in the entire area integrated with the hole are extracted from the 3D-CAD model. Extracted as features.

If the 3D-CAD model does not include, for example, a "bend" feature, the "bend" feature is not extracted.

In such feature addition work, irrelevant design rules are eliminated, and design rules determined to be necessary for the user are specified and presented. This makes it easier for the user to grasp appropriate design rules. When there are many design rules to be presented, from the viewpoint of preventing omissions in confirmation and ensuring visibility, for example, an existing feature may be highlighted and the design rule may be presented by a balloon from the existing feature.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the design support device of the embodiment.

In this figure, the design support apparatus 100 includes an input/output unit 101 (including a display unit) and a 3D-CAD data input unit 102 (3D-CAD data specifying unit) for inputting 3D-CAD data and new feature information. ) and a new feature input unit 103 (new feature identification unit). Note that the new feature input unit 103 is also called a "receiving unit".

The input/output unit 101 is used by a user to input various types of information about the object to be designed, and displays design rules. Examples thereof include a terminal used by a user and having a keyboard and a display, a personal computer (PC), and the like.

In the 3D-CAD data of the 3D-CAD data input unit 102, one or more design objects are composed of one or more bodies (parts constituting the design objects). This body is one region (integrated region) closed by planes and lines, and is composed of one or more features. Features include, for example, information about shape (dimensions) and position. The 3D-CAD data also includes, for example, relative positional information between multiple bodies.

The body is also referred to as a "designed body".

The new feature input unit 103 specifies a new feature that is a feature to be added to the 3D-CAD data (feature to be added). In this embodiment, a new feature is given as an example of the first design item, but the first design item is a feature to be modified (a feature to be modified) from existing features already included in the 3D-CAD data. may Also, the first design item may be a feature to be removed from the existing features already included in the 3D-CAD data (feature to be removed). In summary, the first design item includes various pieces of information about the design object that the user has entered for modification. In other words, "change" here means addition, correction, removal, etc. of a feature desired by the user. Furthermore, the object of change may be the body.

The new feature information includes the new feature's classification (hole, bend, rib, etc.) and the new feature's additional area. For example, in a sketch that defines the two-dimensional shape of the new feature, the added area of the new feature corresponds to a target plane of the sketch (also called a "sketch plane"). This new feature addition area may be an area based on the distance from the feature temporary placement position before the sketch is finalized.

The design support apparatus 100 further includes a design item storage unit 104, an existing feature identification unit 105 for identifying existing features included in 3D-CAD data, a design rule database 109 in which design rules are registered in advance, and a design It includes a rule-applied existing feature extraction unit 106, a design rule identification unit 107, and a display control unit 108 (output unit).

The design item storage unit 104 stores design items including various information on the design object. The various information includes, for example, the shape, position, mass, volume, strength, heat insulating performance, etc. of the object to be designed. In the first embodiment, design items relating to the shape and position of 3D-CAD data are stored.

The existing feature identification unit 105 identifies a design target body that includes a new feature that the user is going to add, and identifies an existing feature that is a fixed feature included in the design target body. The existing feature identification unit 105 can be rephrased as a design item identification unit, and identifies the first design item and the second design item related to the first design item. Also, the second design item is a finalized design item included in the part that constitutes the object to be designed. The existing feature identification section 105 , that is, the design item identification section may include the new feature input section 103 .

A design rule applicable existing feature extracting unit 106 specifies a region to be considered in a design rule applicable to a new feature as a design rule applicable region, and extracts an existing feature included in the design rule applicable region.

The design rule identifying unit 107 identifies design rules applicable to the design rule applicable existing feature extracted by the design rule applicable existing feature extracting unit 106 from among the design rules recorded and accumulated in the design rule database 109. do. More specifically, before the user confirms the new feature, design rules for the new feature are identified based on a combination of the new feature and design rules for the existing features recorded in the design rule database. In summary, the design rule identifying unit 107 uses the first design item and the second design item to identify the design rule, which is the rule for designing the object to be designed. Furthermore, it is desirable that the design rule identifying unit 107 refers to the design rules accumulated in the design rule database to identify the design rule related to the first design item.

The display control unit 108 outputs the presentation target design rule to the input/output unit 101 . In the input/output unit 101, an existing feature related to the design rule to be presented may be displayed by highlighting or the like in order to ensure visibility. A display screen may be provided not only in the input/output unit 101 but also in the display control unit 108 . In this manner, two screens may be displayed using the input/output unit 101 and the display control unit 108 . This improves the operability for the user.

As another explanation, the display control unit 108 outputs to the input/output unit 101 the design rule regarding the new feature specified by the design rule specifying unit 107 . Moreover, it is desirable that the display control unit 108 outputs the specified design target body or new feature to the input/output unit 101 so that it can be distinguished from other bodies or features.

In this figure, the display control unit 108 outputs the design rule specified by the design rule specifying unit 107 to the input/output unit 101 before the user confirms the input of the first design item. The input/output unit 101 displays the design rule output from the display control unit 108. FIG.

In the design rule database 109, for example, the design rule 1 "The distance between the hole and the edge should be 10 mm or more. The edge should be the edge of the same body as the hole." Design rule 3: The distance between the bend and the rib should be 20 mm or more. The rib should be on the same body as the bend.” Design rule 4: The hole The distance between them should be 20 mm or more, and the holes should be holes in the same body.", and registered in the design rule database. At this time, values such as the distance may be determined from mathematical formulas and/or tables, such as by making it possible to change values such as the variable of the new feature (for example, hole diameter). Also, the valid/invalid of the design rule may be switched by the variable of the new feature.

Note that the main computing unit of the design support device 100 may be a semiconductor package. A semiconductor package includes a semiconductor chip having an integrated circuit (IC), a resin covering the semiconductor chip, and terminals enabling communication with the outside. In this specification, this semiconductor package is called a "design support device". The design support device includes a 3D-CAD data input unit 102, a new feature input unit 103, an existing feature identification unit 105, a design rule applied existing feature extraction unit 106, a design rule identification unit 107, and a display control unit 108. ,including. Also, the design support device may include the design rule database 109 .

FIG. 2 is a flowchart showing an example of processing in the design rule applied existing feature extraction unit 106 .

As shown in the figure, first, a new feature classification is acquired (step S201), and design rules applicable to the new feature classification are extracted from the design rule database 109 (step S202). 0 is substituted for the variable i as an initial value (step S203), and 1 is added (step S204). A design rule application area condition for the i-th design rule is obtained from the extracted design rules (step S205). Subsequently, features that match the acquired design rule applicable region conditions are acquired from the existing features and added to the design rule applicable existing features (step S206).

Next, it is determined whether or not i is greater than or equal to the extracted number of design rules (step S207). If i is less than the extracted number of design rules, that is, if No, the process returns to step S204. If i is greater than or equal to the number of extracted design rules, that is, if Yes, design rule-applied existing features are output (step S208).

Here, the above design rules 1 to 4 will be used as examples for explanation.

When adding a hole feature to a 3D-CAD model that has edge and hole features but no bend and rib features, if the user selects "hole" as the classification, in step S202, design rule 1, Extract 2 and 4. Design rule 3 is not extracted because it is not a design rule for the "hole" feature. In step S205, in the case of design rule 1, the portion of "the edge in the same body as the hole" is set as the applicable area condition. In step S206, in the case of design rule 1, all "edge" features in the same body as the hole are obtained and added. Since there is no "bend", there are no features to extract for design rule 2.

In addition to the same body, the applicable area conditions include identical/designated parts, identical/designated 3D-CAD data, identical/designated materials, identical/designated names (including partial matches), identical/designated manufacturing methods (including conditions). ), same/specified inspection method (including conditions), same/specified maintenance operation method (including conditions), and same/specified use, by utilizing attribute information contained in 3D-CAD data , various forms are possible.

FIG. 3 is a flowchart showing the details of the step S206 of adding the feature obtained from the existing feature to the design rule-applied existing feature.

In the example shown in this figure, existing features are extracted by narrowing down to the same body as the new feature, which is often the design rule application area.

First, an existing feature connected to the new feature is extracted (step S301). Then, an existing feature connected to the extracted feature is extracted (step S302).

It is determined whether there are any additionally extracted features (step S303). If No, ie if there are additional extracted features, return to step S302. If Yes, that is, if there are no additionally extracted features, the extracted existing features are added to the design rule-applied existing features (step S304).

The design rule identification unit 107 identifies design rules to be presented in order to eliminate design rules that are not related to the new feature addition work (unnecessary design rules) and prompt the user to grasp appropriate design rules.

FIG. 4 is a flowchart showing an example of processing in the design rule specifying unit 107. As shown in FIG.

As shown in this figure, first, the classification of the new feature is obtained (step S401). Then, a design rule corresponding to the new feature classification is extracted from the design rule database 109 (step S402). 0 is substituted for the variable j as an initial value (step S403), and 1 is added (step S404). The j-th existing feature is obtained from the design rule applied existing features output by the design rule applied existing feature extraction unit 106 (step S405). A design rule that matches the acquired existing feature is acquired from the extracted design rules, and added to the design rules to be presented (step S406).

It is determined whether or not j is equal to or greater than the number of existing features to which design rules are applied (step S407). If No, that is, if j is less than the number of existing features to which design rules are applied, go back to step S404. If Yes, that is, if j is equal to or greater than the number of existing features to which the design rule is applied, the design rule to be presented is output (step S408).

FIG. 5 shows an enlarged example of the screen of the input/output unit.

In this figure, existing features 503 and 505 are displayed with design rules 502 and 504 relating to a new feature 501 indicated by a dashed line. Here, since the design rule 502 is a design rule relating to edge features, a balloon is displayed from the existing edge feature 503 . Similarly, since the design rule 504 is a design rule relating to the hole feature, a balloon is displayed from the existing feature 505 of the hole.

As a result, necessary design rules can be grasped while confirming the positional relationship with the existing features 503 and 505 . Furthermore, since the display positions are distributed rather than displaying all the design rules to be presented near the new feature, the visibility is improved. Also, like the existing feature 503 displaying the design rule, the visibility can be further improved by highlighting by thickening the thickness of the outline or changing the color.

Furthermore, when highlighting is performed by increasing the thickness of the outline or changing the color, the user can change the area to be highlighted and change the display range of the design rule. As a result, the user can check only the design rule in the desired range, further improving the visibility.

Note that the design rule identifying unit 107 may identify only the design rule of the violating part by using the first design item and the second design item.

Furthermore, among the displayed design rules, the design rules recognized by the designer can be clearly distinguished from the design rules recognized by the designer by changing the color, etc., from the unrecognized design rules. Failure to recognize rules can be prevented. As a method of inputting the designer's recognition, there are a method of clicking a design rule display portion such as a balloon by the designer, a method of inputting the designer's voice, line of sight, gesture, etc. from a microphone or a camera.

FIG. 6 shows another example of the screen of the input/output unit.

The existing feature 610 shown in this figure has an existing feature 611 of a hole. As an example, a hole feature 601 and features 602, 603, and 604 based on the pattern of the hole feature 601 are added to the existing feature 610 as new features.

When there are many features to be highlighted, a design rule display section 605 may be provided in a separate frame so that the user can select the design rule 606 related to the features to be highlighted. Furthermore, even if you are sketching the +Z plane (upper surface) of hole features 601 to 604, for example, hidden lines can be highlighted to understand the features that need attention even if they are not visible. The shape and position of the feature can be determined while

Note that the present disclosure is not limited to the above examples, and includes various modifications. The above embodiments have been described in detail to facilitate understanding of the present disclosure, and are not necessarily limited to those having all the configurations described. A part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Moreover, it is also possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

Some or all of the above configurations, functions, processing units, processing means, etc. may be realized by hardware such as integrated circuits. Each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, and files that implement each function can be stored in recording devices such as memory, hard disks, SSDs (Solid State Drives), or recording media such as flash memory cards and DVDs (Digital Versatile Disks). can.

In each embodiment, the control lines and information lines indicate what is considered necessary for explanation, and not all control lines and information lines are necessarily indicated on the product. In fact, it may be considered that almost all configurations are interconnected.

Further, modifications of the present disclosure include, for example, the following (a) and (b).

(Modification (a))
In this modified example, in addition to the design rule, the actual shape determined to be similar in the parameters (hole diameter, etc.) and the relative position of a plurality of features included in the design rule application area is displayed. Here, the track record shape is a shape that has a track record that satisfies all quality requirements as a product. In other words, it is a shape that has been empirically recognized as satisfying all of the prescribed conditions as a product. Therefore, the actual shape satisfies requirements not included in the design rules.

By displaying the actual shape overlaid on the halfway created design drawing, it is possible to define the parameters and positions of new features while referring to the shape that has a track record as a product.

FIG. 7 is a configuration diagram showing a design support device of modification (a).

A design support apparatus 700 shown in this figure is provided with a performance shape database 709 . Further, between the design rule specifying unit 107 and the display control unit 108, an actual shape specifying unit 710 is provided. Patterns of actual shapes and feature parameters and relative positions are registered in advance in the actual shape database 709 . In other words, the actual shape database 709 is pre-recorded with data on parameters and relative positions of actual shapes and features. The track record shape identification unit 710 identifies similar track record shapes. In other words, the track record shape identification unit 710 identifies applicable track record shapes among the track record shapes recorded in the track record shape database 709 .

Note that, in this modified example, the design support device includes an actual shape identification unit 710 . The design support device may also include an actual shape database 709 .

FIG. 8 is an enlarged view showing an example of the screen of the input/output unit of modification (a).

In this figure, the actual shape 806 is superimposed on the halfway created design drawing.

(Modification (b))
In this modified example, in addition to the design rule, the optimum shape determined to be similar in the parameters (hole diameter, etc.) and relative positions of a plurality of features included in the design rule application area is displayed. Here, the optimum shape is the optimum shape for some requirements, which is obtained by simulation, experiment, or the like. In other words, it is a shape that is optimized under certain assumptions, although it does not necessarily satisfy all requirements as a product.

By displaying the optimal shape overlaid on the half-finished design drawing, it is possible to define the parameters and positions of new features while referring to the ideal shape.

FIG. 9 is a configuration diagram showing a design support device of Modification (b).

An optimum shape database 911 is provided in the design support apparatus 900 shown in this figure. An optimum shape identification unit 912 is provided between the design rule identification unit 107 and the display control unit 108 . The optimum shape database 911 pre-registers patterns of optimum shapes and feature parameters and relative positions. In other words, the optimum shape database 911 is pre-recorded with data on optimum shapes and feature parameters and relative positions. The optimal shape identification unit 912 identifies similar optimal shapes. In other words, the optimum shape identification unit 912 identifies an applicable optimum shape among the optimum shapes recorded in the optimum shape database 911 .

It should be noted that in this modification, the design support device includes an optimum shape identification unit 912 . The design support device may also include an optimum shape database 911 .

FIG. 10 is an enlarged view showing an example of the screen of the input/output unit of modification (b).

In this figure, an optimum shape 1006 is superimposed on the halfway created design drawing.

Note that "similar" in the above description means having features that are applicable to the part under design (body to be designed) from the viewpoint of design rules, feature parameters, relative positions, and the like.

The feature parameters for determining similarity may include numerical information represented by dimensions such as hole diameters, as well as character string information such as material information, manufacturing method, and usage.

Alternatively, modification (a) and modification (b) may be combined. In this case, referring to a shape that satisfies requirements not included in the design rules and an ideal shape that satisfies some requirements, , you can define the parameters and position of the new feature.

In the above-described embodiment, the feature is a design item related to the shape and position of the object to be designed. However, the embodiment of the present disclosure is not limited to this. Other embodiments are also conceivable.

For example, as a new feature, the user may input design items related to the mass, volume, strength, heat insulation performance, etc. of the plate material, which are the functions of the object to be designed.

Examples of this case include:

From the viewpoint of weight reduction, if there is a demand to reduce the mass of the steel plate that constitutes the housing of the washer/dryer, it is conceivable, for example, to reduce the thickness of the steel plate in order to reduce the mass. In this case, the user inputs the mass of the steel plate as a new feature.

The design support device receives this input, takes into account the strength of the steel plate, etc., and determines the allowable thickness of the steel plate, the position of reinforcing members to be added to maintain the strength, and the changeable range of the shape of the housing. Output design rules such as

In addition, if there is a request to reduce the thickness of the insulation material of the refrigerator from the viewpoint of expanding the internal volume of the refrigerator, the user can input the thickness of the insulation material and the type of applicable vacuum insulation material as a new feature. .

The design support device receives this input, takes into account the heat insulation performance, etc., and outputs design rules such as the placement of the vacuum heat insulating material, refrigerant piping in some cases, the position of the condenser for releasing heat to the outside, and the like.

Features based on the design rules as described above are determined by the user's judgment.

Applications of the design support device include not only the above examples, but also various products such as structures of railway vehicles and wings of airplanes.

Therefore, the new feature, that is, the first design item may be not only the shape and position of the object to be designed, but also various information such as mass, volume, strength, and heat insulation performance.

Further, the case where the user requests correction of features will be described below.

For example, in the case where a hole is provided in a plate material that constitutes a conventional product, it is conceivable that the diameter of this hole is increased. In this case, the existing feature is the diameter of the hole in the conventional product. Enlarging the diameter of this hole corresponds to the modification of the first design item.

Also, the case where the user requests removal of a feature will be described below.

For example, if there is a reinforcing member as an existing feature, it is conceivable to remove this reinforcing member. In this case, removal of the reinforcing member corresponds to removal of the first design item. In this case, in order to maintain the strength of the product, it is considered necessary to change the design rule such as changing the dimensions such as the thickness of other parts. The design support device outputs design rules that are candidates for such changes.

Next, the effects of the present disclosure will be collectively described.

According to the present disclosure, before the designer decides the feature to be changed, that is, before the feature to be changed is stored in the design item storage unit, it is possible to clearly indicate whether the design rule or the like is appropriate. It enables designers to easily create appropriate 3D-CAD models, so that even designers who do not fully understand design rules can proceed with design with peace of mind. be able to.

Finally, the design support method of the present disclosure will be described as a summary.

In the design support method, the receiving unit receives the first design item input by the user, and the design item specifying unit selects the second design item related to the first design item from the design items stored in the design item storage unit. The design rule identifying unit uses the first design item and the second design item to identify the design rule, which is the design rule for the design object, and the output unit outputs the design rule.

Further, in the design support method, the receiving unit receives the first design item including various information of the design object input by the user for modification, and the design item identifying unit receives the first design item and the first design item. A second design item related to one design item is specified, a design rule specifying unit uses the first design item and the second design item to specify a design rule that is a rule for designing a design object, and a second design item is specified. The output unit outputs the design rule specified by the design rule specifying unit before the one design item becomes the second design item.

Note that the design support method of the present disclosure can also be implemented on the cloud. In that case, among the components of the design support system shown in FIG. . Therefore, the server and the user's terminal constitute a system (design support system).

100, 700, 900: design support device, 101: input/output unit, 102: 3D-CAD data input unit, 103: new feature input unit, 104: design item storage unit, 105: existing feature identification unit, 106: design rule Applicable existing feature extraction unit 107: Design rule identification unit 108: Display control unit 109: Design rule database 501: New feature 502, 504, 606: Design rule 503, 505, 610: Existing feature 601: Features of holes 602, 603, 604: Features 611: Existing features of holes 605: Design rule display unit 709: Actual shape database 710: Actual shape identification unit 911: Optimal shape database 912: Optimal shape identification Part 1006: Optimal shape.

Claims (15)

a design item storage unit for storing design items including various information of the design object;
a receiver for receiving a first design item input by a user;
a design item identifying unit that identifies a second design item related to the first design item from the design items stored in the design item storage unit;
a design rule identifying unit that identifies a design rule, which is a rule for designing the design object, using the first design item and the second design item;
and an output unit that outputs the design rule. further comprising a design rule database for accumulating the design rules;
2. The design support device according to claim 1, wherein said design rule identifying unit refers to said design rules accumulated in said design rule database to identify a design rule relating to said first design item. 2. The design support device according to claim 1, wherein said design rule identifying unit uses said first design item and said second design item to identify only the design rule of a violating portion. 2. The design support device according to claim 1, wherein said output unit outputs said first design item or said second design item so as to be distinguishable from other parts or design items. an actual shape database in which data on actual shapes, which are shapes with a track record that satisfies product quality, and data on parameters and relative positions of design items are recorded in advance;
2. The design support device according to claim 1, further comprising a track record shape identifying unit that identifies an applicable track record shape among said track record shapes. An optimum shape database in which data on the optimum shape, which is the optimum shape for some requirements, and the parameters and relative positions of design items obtained by simulation or experiment are recorded in advance;
2. The design support device according to claim 1, further comprising an optimum shape identification unit that identifies an applicable optimum shape among said optimum shapes. The design item specifying unit specifies a part that constitutes the design object and includes the first design item that the user is going to add, and identifies a confirmed design item included in the part. 2. The design support device according to claim 1, which specifies said second design item. 2. The design support device according to claim 1, wherein said first design item includes the shape and position of said design object. The design support device according to any one of claims 1 to 8,
and a display unit for displaying the design rule output from the output unit after the user inputs the first design item. The design item storage unit stores design items including various information of the design object,
a receiving unit receiving a first design item entered by a user;
A design item identifying unit identifies a second design item related to the first design item from the design items stored in the design item storage unit,
a design rule specifying unit, using the first design item and the second design item, to specify a design rule that is a rule for designing the design object;
A design support method in which an output unit outputs design rules. A design rule database stores the design rules,
11. The design support method according to claim 10, wherein said design rule identifying unit refers to said design rules accumulated in said design rule database to identify a design rule relating to said first design item. 11. The design support method according to claim 10, wherein said design rule identifying unit uses said first design item and said second design item to identify only the design rule of the violating portion. 11. The design support method according to claim 10, wherein said output unit outputs said first design item or said second design item so as to be distinguishable from other parts or design items. 11. The design support method according to claim 10, wherein said input/output unit inputs said first design item by said user and displays said design rule output from said output unit. 11. The design support method according to claim 10, wherein said first design item includes the shape and position of said design object.

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