JP2003122797A - Product designing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that new three-dimensional CAD data has a structure which does not satisfy terms on production technique when three- dimensional CAD data is corrected to generate the new three-dimensional CAD data in a conventional three-dimensional CAD device. SOLUTION: A product designing device includes a knowledge information storing part 40 for storing design procedure information concerning various products and terms desired which indicates the terms on production technique. The design procedure of the product to be designed and the terms desired are read from the knowledge information storing part 40, the structure is designed based on product design and design procedure information corresponding to it and it is judged whether the designed structure satisfies the terms desired or not. The judgement result is reported to a user and the user obtains an opportunity to correct the structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product design device for efficiently designing products.

[0002]

2. Description of the Related Art Generally, in the case of designing the structure of a product using a three-dimensional CAD device, the correction of three-dimensional CAD data is repeated until the final structure is determined. As a technique for correcting three-dimensional CAD data, three-dimensional C
A technique for generating new three-dimensional CAD data along with a change in the position of a control point on AD data is disclosed in Japanese Patent Laid-Open No. 6-14994.
No. 4 publication.

[0003]

In the conventional three-dimensional CAD apparatus, the three-dimensional CAD data is corrected to create a new three-dimensional CAD data.
A new three-dimensional CA when three-dimensional CAD data is generated
In some cases, the D data had a structure that did not meet the conditions of production technology. As an example of various conditions in the production technology, there is a case where a predetermined upper limit value is set for the wall thickness of the resin member in order to prevent the occurrence of sink marks when the resin member is injection molded.

Therefore, an object of the present invention is to provide a structure designing apparatus which can solve the above problems.

[0005]

That is, a product designing apparatus for designing a product according to the first aspect of the invention designs a product for each product and a design information receiving unit for receiving design information of a predetermined product. Product design information storing section that stores design procedure information, constraint conditions for product structure, and product design information that reads the design procedure information and the constraint conditions for the predetermined product from the product structure information storage section. According to the reading unit, the design information and the design procedure information corresponding thereto, it is determined whether or not the structural design unit that performs structural design and the product design structure designed by the structural design unit satisfy the constraint condition. A constraint condition determination unit and a constraint condition determination result notification unit that notifies the user of the determination result by the constraint condition determination unit.

In the product design apparatus for designing a product according to the second aspect of the invention, the constraint condition includes an absolute condition regarding the structure of the product, and the constraint condition determination unit includes the constraint condition in the product design structure. When it is determined that the structure does not satisfy the absolute condition for the structure of the product, the product structure forcible correction unit for forcibly correcting the product design structure so as to satisfy the absolute condition is further provided. .

In the product designing apparatus for designing a product according to the third aspect of the present invention, the constraint condition includes a desired condition that defines a desirable condition for the product structure, and the constraint condition judging section determines the product design structure. And a product structure arbitrary correction unit that allows the user to select whether or not to modify the product design structure when it is determined that the structure included in the product does not satisfy the desired condition for the product structure.

A product designing apparatus for designing a product according to a fourth aspect of the present invention includes a design information receiving section for receiving design information of a predetermined product, design procedure information for designing a product for each product, and a product. A constraint condition storage unit that stores an absolute condition that determines an absolute condition for the structure of the product and a desired condition that defines a desired condition for the structure of the product, the design procedure information for the predetermined product, the absolute condition, and The product design information reading unit that reads the desired condition from the product structure information storage unit, the structure design unit that performs the structure design according to the design information and the design procedure information corresponding thereto, and the structure design unit The product design structure is included in the product design structure by an absolute condition judging unit that judges whether or not the product design structure satisfies the absolute condition, and the absolute condition judging unit. When it is determined that the structure to be satisfied does not satisfy the absolute condition for the structure of the product, the product structure compulsory correction unit for forcibly correcting the product design structure so as to satisfy the absolute condition, and the absolute condition A product design structure determined to satisfy, or a structure included in the product design structure modified by the product structure forced modification unit, a desired condition determination unit for determining whether or not the desired condition is satisfied, and A desired condition determination result notification unit that notifies the user of the determination result by the desired condition determination unit, and a product design structure determined to satisfy the absolute condition, or
Whether to modify the product design structure when the desired condition judging unit judges that the structure included in the product design modified by the product structure compulsory modification unit does not satisfy the desired condition for the structure of the product. And a product design structure arbitrary correction unit that allows the user to select whether or not.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described through embodiments of the invention.

FIG. 1 shows a product design apparatus 10 according to an embodiment.
It is a block diagram showing the structure of.

The product design device 10 includes a design information reception unit 2
0, structure design information reading unit 30, knowledge information storage unit 4
0, a structure design unit 41, an absolute condition determination unit 50, a product structure compulsory correction unit 60, an absolute condition processing notification unit 70, a desired condition determination unit 80, a desired condition determination result notification unit 90, and a product structure arbitrary correction unit 100.

The design information receiving section 20 stores design information including design CAD data about the product and information associated with the product (name of structure included in the product, material of the product, etc.).
It is received from the operator via an input device such as a keyboard and a mouse (not shown).

Based on the design information received by the design information receiving unit 20, the structural design information reading unit 30 receives information necessary for structural design from the knowledge information storage unit 40 (design procedure information, absolute conditions and desired conditions described later). ) Is read. The read information is stored in a memory (not shown) and can be appropriately used.

The knowledge information storage section 40 stores, for each product, design procedure information for designing the product, and various conditions that the structure of each product should satisfy. The various conditions include, for example, a product design condition for satisfying a predetermined product specification and performance, a production technology condition for satisfying a constraint on a production technique when the product is actually produced, and the like. These conditions are classified into conditions that the product structure must absolutely satisfy (absolute conditions), conditions that the product structure must satisfy (desired conditions), and the like. FIG. 2 shows a constraint condition table 42 stored in the knowledge information storage unit 40. The constraint condition table 42 stores information on the constraint condition, the reason for the constraint, and the type of the constraint condition (absolute condition or desired condition) for each combination of the structure included in the product and the material used. For example, for the rib, if the material is ABS, the condition of rib base plate thickness W ≦ 0.6 × substrate plate thickness T is set as a desired condition because of the possibility of preventing sink marks during injection molding. ing.

Returning now to FIG. 1, the structural design unit 41 is
The design C received by the design information receiving unit 20 according to the design procedure information read by the design information reading unit 30.
Structural design is performed along the design surface represented by the AD data, and structural design CAD data is generated.

The absolute condition judging unit 50 reads the absolute condition stored in the memory, judges whether the structural design CAD data created by the structural design information reading unit 30 satisfies the absolute condition, and judges. Output the result. When the structural design CAD data does not meet the absolute conditions, the structural design CAD data is
When the structural design CAD data is transmitted to the product structure compulsory correction unit 60 described later and the absolute information is satisfied, the structural design CAD data is transmitted to the desired condition determination unit 80 described later.

When the absolute condition judging unit 50 judges that the structural design CAD data does not satisfy the absolute condition, the product structure compulsory correction unit 60 accepts the structural design CAD data and the absolute condition so that the absolute condition is satisfied. The structural design CAD data is forcibly corrected.

The absolute condition processing notification unit 70 receives the absolute condition determination result from the absolute condition determination unit 50 and the information about the forced correction processing from the product structure forced correction unit 60, and the information is not shown. Displayed on the monitor, CAD for structural design based on the judgment result of absolute conditions
Notify the operator of the contents of data correction.

The desired condition determination unit 80 receives the structural design CAD data forcibly corrected by the product structure forced correction unit 60 or the structural design CAD data determined by the absolute condition determination unit 50 as satisfying the absolute condition. Upon reception, the desired conditions stored in the memory are read. The desired condition determination unit 80 then receives the received structural design CAD.
A determination is made as to whether or not the data satisfies the desired conditions, and the determination result is output.

The desired condition determination result notification unit 90 notifies the operator of the result of the desired condition determination unit 80 determining the desired condition.

The product structure arbitrary correction section 100 causes the desired condition determination section 80 to select whether or not to correct the structural design CAD data when the structural design CAD data does not satisfy the desired condition, and if necessary, The structural design CAD data is corrected. The correction process of the structural design CAD data may be performed manually by an operator, but a structural design CAD data plan that satisfies a desired condition may be presented to the operator and the operator may be selected.

Next, the operation of the product design apparatus 10 will be described with reference to FIG.
This will be described with reference to the flowchart of.

The design data of the product (three-dimensional design CAD data) and the information such as the structure name and the material used in the design data are accepted (S10). Based on the received information such as the structure name and the material, the knowledge information storage unit 4
Knowledge information including design procedure information, absolute conditions, and desired conditions is read from 0 and stored in a memory or the like (S
20). Based on the received three-dimensional design CAD data and the design procedure information, product structure data (three-dimensional structure design CAD data) is generated (S22). Next, it is determined whether or not the generated three-dimensional structural design CAD data satisfies the absolute condition (S30). When it is determined that the three-dimensional structure design CAD data does not satisfy the absolute condition, the three-dimensional structure design CAD data is forcibly corrected so as to satisfy the absolute condition (S40). Three
When the dimensional structure design CAD data is forcibly modified, the operator is notified of the content (S50). When it is determined in the absolute condition determination (S30) that the three-dimensional structure design CAD data satisfies the absolute condition,
A determination (desired condition determination) is made as to whether or not the desired condition is satisfied for the three-dimensional structural design CAD data (S60). Further, when the forced correction (S40) of the CAD data of the three-dimensional structure design and the subsequent notification (S50) are performed, the three-dimensional structure design CA that has been forcedly corrected
Desired condition determination is performed on the D data (S6).
0). Subsequently, the operator is notified of the result of the desired condition determination and the information such as the reason why the desired condition is set (S70). The operator determines whether to correct the three-dimensional structure design CAD data based on the notified information, and corrects the three-dimensional structure design CAD data if necessary (S80).

FIG. 4 shows a judgment result screen 200 displaying the judgment result of the desired condition. The determination result screen 200 shows the product structure that is the target of the determination. If there is a part that does not meet the desired conditions, by displaying the line type, line color, line thickness, etc. of that part in a different form from other parts, which part meets the desired condition. It will be displayed in an easy-to-understand manner. Further, a correction plan (dotted line in FIG. 4) that is corrected so as to satisfy the desired condition is displayed for the part.

A message screen 210 is further displayed on the determination result screen 200. The message screen 210 displays the result of the determination of the desired condition and what will be a problem when the product structure remains the original draft. This allows
The operator can quickly grasp the importance of the problem and can use it as a material for determining whether or not to make a correction to satisfy the desired condition.

Further, on the message screen 210, a selection button for selecting whether or not to change the proposed correction plan is displayed. Thereby, the operator can correct the product structure without trouble if the operator determines that the correction is necessary.

[0027]

As is apparent from the above description, according to the present invention, it is possible to efficiently carry out product design taking into consideration the constraint conditions regarding the structure of the product.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a product design device 10 according to an embodiment.

FIG. 2 is a diagram showing a constraint condition table 42 stored in a knowledge information storage unit 40.

FIG. 3 is a flowchart showing the operation of the product design device 10.

FIG. 4 is a diagram showing a determination result screen 200 displaying a determination result of desired conditions.

[Explanation of symbols]

10 product design device, 20 design information reception unit, 30 structural design information reading unit, 40 knowledge information storage unit, 41
Structural design unit, 42 constraint condition table, 50 absolute condition determination unit, 60 product structure forced correction unit, 70 absolute condition processing notification unit, 80 desired condition determination unit, 90 desired condition determination result notification unit, 100 product structure arbitrary correction unit, 200 determination result screen, 210 message screen.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshio Shirai             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Shigeharu Ueyama             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Koji Eguchi             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Goro Takahashi             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Takatoshi Negishi             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F-term (reference) 5B046 FA16 JA01 KA05

Claims (4)

[Claims] 1. A product design apparatus for designing a product, a design information receiving section for receiving design information of a predetermined product, design procedure information for designing a product for each product, and restrictions on a product structure. A product structure information storage unit that stores conditions, a product design information reading unit that reads the design procedure information and the constraint condition for the predetermined product from the product structure information storage unit, the design information and the corresponding According to the design procedure information, a structure design unit that performs a structure design, a constraint condition determination unit that determines whether the product design structure designed by the structure design unit satisfies the constraint conditions, and the constraint condition determination unit A product design device, comprising: a constraint condition determination result notification unit that notifies a user of a determination result. 2. The constraint condition includes an absolute condition regarding a structure of a product, and the constraint condition determination unit allows a structure included in the product design structure to satisfy an absolute condition regarding a structure of the product. The product design apparatus according to claim 1, further comprising a product structure forcing correction unit that forcibly corrects the product design structure so as to satisfy the absolute condition when it is determined that the product design structure is not satisfied. . 3. The constraint condition includes a desired condition that defines a desirable condition for a product structure, and the constraint condition determination unit allows a structure included in the product design structure to satisfy a desired condition for the product structure. The product design apparatus according to claim 1, further comprising: a product structure arbitrary modification unit that allows a user to select whether or not to modify the product design structure when it is determined that the product design structure is not modified. 4. A product design apparatus for designing a product, a design information receiving section for receiving design information of a predetermined product, design procedure information for designing a product for each product, and an absolute information about a structure of the product. Condition storage unit storing an absolute condition that determines a desired condition and a desired condition that determines a desirable condition for a product structure, the design procedure information about the predetermined product, the absolute condition, and the desired condition, A product design information reading unit that is read from the product structure information storage unit, a structure design unit that performs structure design according to the design information and the design procedure information corresponding thereto, and a product design structure designed by the structure design unit is the An absolute condition determination unit that determines whether or not an absolute condition is satisfied, and a structure included in the product design structure by the absolute condition determination unit. Structure is determined not to meet the absolute conditions for the structure of the product, the product structure forcibly correcting unit for forcibly correcting the product design structure to satisfy the absolute conditions, and the absolute conditions are satisfied. And a desired condition determining unit that determines whether or not the product design structure determined to be in conformity or the structure included in the product design structure corrected by the product structure compulsory correction unit satisfies the desired condition, Included in the desired condition determination result notification unit for notifying the user of the determination result by the condition determination unit, the product design structure determined to satisfy the absolute conditions, or the product design corrected by the product structure forced correction unit Whether or not the product design structure is modified when the desired condition judging unit judges that the structure does not satisfy the desired condition for the structure of the product. Product design apparatus comprising: the product design structure optionally modifying unit selection by the over THE, the.