JP5437926B2 - Shape data creation system and shape data creation method - Google Patents

Description

  The present invention relates to a shape data creation system and a shape data creation method. Specifically, the present invention relates to a shape data creation system and a shape data creation method for creating second shape data representing a second shape corresponding to a first shape corresponding to first shape data representing a first shape in a vehicle.

  Conventionally, in the design of a vehicle, a design shape that determines the appearance of the vehicle is designed in an initial stage, and in the subsequent stage, an inner plate shape that determines the internal shape of the vehicle corresponding to this design shape, and press processing The required molding shape is designed. Subsequently, based on the design shape, the inner plate shape, and the molding shape, a moldability simulation is actually performed to examine whether or not molding is possible. Subsequently, when an examination result indicating that molding is possible is obtained, the design shape, the inner plate shape, and the molding shape are determined.

  However, since the design shape, inner plate shape, and molded shape are mainly designed in this order, the inner plate shape and molded shape are not designed immediately after the design shape is designed, and verification simulation is performed. Can not do. For this reason, it is necessary to perform verification simulation after the inner plate shape and the molded shape are designed, and if a study result indicating that molding is impossible is obtained, it is necessary to redesign the design shape, resulting in significant rework. It will occur.

  Therefore, a method for efficiently designing the shape of the vehicle is required at the initial stage. For example, in Patent Document 1, components of components such as other vehicles are stored in advance in a database, and by receiving input of initial design information such as shapes, the shape of the initial design for each component of the vehicle The apparatus which selects the member which suits and produces a design proposal is shown.

JP 2002-366606 A

  By the way, in the apparatus described in Patent Document 1, since a member that matches the shape of the initial design is selected from the database, the member that matches the shape of the initial design needs to be stored in the database in advance. However, since the shape of the initial design is unknown, it is difficult for the apparatus described in Patent Document 1 to store all the members that match the shape of the initial design in the database. Therefore, in the apparatus described in Patent Document 1, design information necessary for study of formability cannot be obtained when a member that matches the shape of the initial design is not stored in the database.

  An object of the present invention is to provide a shape data creation system and a shape data creation method capable of creating design information necessary for study of formability in an initial stage of vehicle design.

  The shape data creation system (for example, shape data creation system 1 described later) of the present invention corresponds to first shape data (for example, design shape data described later) indicating the first shape (for example, design shape described later) in the vehicle. Then, shape data creation for creating second shape data (for example, inner plate shape data and molded shape data described later) indicating a second shape (for example, inner plate shape and molded shape described later) corresponding to the first shape is performed. A storage unit (for example, a shape DB 11 described later) that associates and stores existing first shape data and existing second shape data, and a reception unit that receives input of new first shape data (for example, a system) , To be described later, and to extract existing first shape data indicating a first shape similar to the first shape indicated by the new first shape data from the storage means The difference in shape between a stage (for example, an extraction unit 13 described later), the first shape indicated by the new first shape data, and the first shape indicated by the existing first shape data extracted by the extracting means Based on the calculated difference, a deformation rule creating means (for example, a deformation rule creating means for creating a deformation rule for bringing the first shape indicated by the existing first shape data closer to the first shape indicated by the new first shape data (for example, The deformation rule creating unit 14), which will be described later, and the existing first shape data associated with the existing first shape data extracted by the extracting means based on the deformation rule created by the deformation rule creating means. A shape data creating means (for example, a shape data creating unit 15 described later) for creating new second shape data corresponding to the new first shape data by transforming the two shape data; Equipped with a.

  According to this invention, the shape data creation system calculates the difference in shape between the first shape indicated by the new first shape data and the first shape indicated by the existing first shape data by the deformation rule creation means. Based on the calculated difference, a deformation rule is created that brings the first shape indicated by the existing first shape data closer to the first shape indicated by the new first shape data. Further, the shape data creation system transforms the existing second shape data associated with the existing first shape data based on the deformation rule created by the deformation rule creation means by the shape data creation means. Then, new second shape data corresponding to the new first shape data is created.

  Therefore, since the shape data creation system can create new second shape data necessary for the study of formability in response to the new first shape data, the initial design of the vehicle in which only the first shape data is designed. At the stage, design information necessary for studying formability can be created.

  In addition, since the formability can be examined from the initial stage of the vehicle design, the first shape that can be easily shaped can be redesigned by feeding back the result of the formability examination to the design of the first shape. . Therefore, the shape data creation system can shorten the product design period and the period until the start of manufacture of the product.

  The shape data creation method of the present invention corresponds to first shape data (for example, design shape data to be described later) indicating a first shape (for example, design shape to be described later) in the vehicle, and a second corresponding to the first shape. A second shape data (for example, inner plate shape data and molded shape data described later) indicating a shape (for example, an inner plate shape and a molded shape described later) is used as a shape data generation system (for example, a shape data generation system 1 described later). A shape data creation method to be created, wherein the shape data creation system includes storage means (for example, a shape DB 11 to be described later) that stores existing first shape data and existing second shape data in association with each other. Receiving the first shape data, and storing the existing first shape data indicating a first shape similar to the first shape indicated by the new first shape data Calculating a difference in shape between the extraction step extracted from the stage, the first shape indicated by the new first shape data, and the first shape indicated by the existing first shape data extracted in the extraction step; Based on the calculated difference, a deformation rule creating step for creating a deformation rule for bringing the first shape indicated by the existing first shape data closer to the first shape indicated by the new first shape data; Based on the deformation rule created in step, the new first shape is deformed by transforming the existing second shape data associated with the existing first shape data extracted in the extraction step. And a shape data creating step for creating new second shape data corresponding to the data.

  According to the present invention, the shape data creation method has the same effects as those described above.

  ADVANTAGE OF THE INVENTION According to this invention, the design information required for examination of a moldability can be produced in the initial stage of vehicle design.

It is a figure which shows the outline | summary of the shape data creation system which concerns on this embodiment. It is a figure which shows the function structure of the shape data creation system which concerns on this embodiment. It is a flowchart which shows the process in the shape data creation system which concerns on this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an outline of a shape data creation system 1 according to the present embodiment. The shape data creation system 1 includes a new inner plate shape and a molded shape (second shape) corresponding to new design shape data (first shape data) indicating the design shape (first shape) in the vehicle. This is a system for creating data and molding shape data (second shape data).

  That is, the shape data creation system 1 receives input of new design shape data and extracts existing design shape data similar to the new design shape data (procedure 1 in FIG. 1). Subsequently, the shape data creation system 1 creates a deformation rule that brings the design shape of the existing design shape data closer to the design shape of the new design shape data (step 2 in FIG. 1). Subsequently, the shape data creation system 1 modifies the inner plate shape data and the molding shape data included in the existing shape data based on the deformation rule, thereby creating a new inner plate shape corresponding to the new design shape data. Data and molding shape data are created (procedure 3 in FIG. 1).

  This embodiment is applied to a computer as the shape data creation system 1 and its peripheral devices. Each function in the present embodiment is configured by hardware included in a computer and its peripheral devices, and software that controls the hardware.

  The hardware includes a storage unit, a communication unit, a display unit, and an input unit in addition to a control unit configured by a CPU or the like. Examples of the storage unit include a memory and a hard disk drive. Examples of the communication unit include various wired and wireless interface devices. Examples of the display unit include various displays such as a liquid crystal display and a plasma display. Examples of the input unit include a keyboard and a mouse.

  The software includes a program and data for controlling the hardware. Programs and data are stored in the storage unit, and are appropriately executed and referenced by the control unit. Further, the program and data can be distributed via a communication line, or can be recorded and distributed on a computer-readable medium such as a CD-ROM.

  FIG. 2 is a diagram showing a functional configuration of the shape data creation system 1 according to the present embodiment. The storage unit of the shape data creation system 1 includes a shape DB 11 as storage means. Further, the control unit of the shape data creation system 1 includes a reception unit 12 as a reception unit, an extraction unit 13 as an extraction unit, a deformation rule creation unit 14 as a deformation rule creation unit, and a shape as a shape data creation unit. A data creation unit 15 and a combining unit 16 are provided.

  The shape DB 11 stores design shape data, inner plate shape data, and molding shape data for each of a plurality of vehicle models in association with each other as existing shape data.

  Here, the design shape data is data created in the initial stage of vehicle design, and is data indicating the external shape of the vehicle, that is, the design shape. The design shape data includes design information such as shapes, dimensions, and members in each of a plurality of parts. Each of the plurality of parts is associated with identification information indicating the part. That is, the design shape data is stored in the shape DB 11 in association with the identification information of each of the plurality of parts and the design information of each of the plurality of parts.

  Further, the inner plate shape data is data created based on the design shape after the design shape is designed, and is data indicating the shape that determines the internal shape of the vehicle corresponding to the design shape of the design shape data. is there. Similarly to the design shape data, the inner plate shape data includes design information such as shapes, dimensions, and members at a plurality of portions. Each of the plurality of parts in the internal shape data is associated with identification information.

  Further, the molding shape data is data created based on the design shape after the design shape has been designed, and is data indicating a shape required at the time of press working. The molded shape data includes design information such as shapes, dimensions, and members at a plurality of parts, as with the design shape data. Each of the plurality of parts in the internal shape data is associated with identification information.

  Thus, the inner plate shape data and the molded shape data are data created based on the design shape after the design shape is designed. That is, the design information of each of the plurality of parts of the design shape data is associated with the design information of each of the plurality of parts of the inner plate shape data and the molded shape data, and the identification of each of the plurality of parts of the design shape data. The information is also associated with identification information of each of the plurality of portions of the inner plate shape data and the molded shape data.

  The accepting unit 12 accepts input of new design shape data. Specifically, the accepting unit 12 inputs input of new design shape data and information on a creation target part (for example, the name or identification information of the creation target part) in the new design shape data via the input unit. Received from the operator of the shape data creation system 1. In addition, although the reception part 12 decided to receive the input of the information of the production | generation object site | part in new design shape data, you may receive the whole new design shape data as a production | generation object site | part, or new design shape data The whole may be divided into a plurality of parts, and each part may be accepted as a creation target part.

  The extraction unit 13 extracts design shape data having a design shape similar to the design shape indicated by the new design shape data received by the reception unit 12 from the shape DB 11.

  Specifically, the extraction unit 13 specifies design information on the creation target part in the new design shape data from the information on the creation target part received by the reception unit 12. Subsequently, the extraction unit 13 specifies existing design shape data including design information similar to the design information of the specified creation target part, which is design information of the creation target part. Subsequently, the extraction unit 13 extracts the specified design shape data from the shape DB 11.

  Note that the extraction unit 13 extracts similar design information using the following method, for example. That is, the extraction unit 13 uses a plurality of axes (with respect to the shape of the part corresponding to the creation target part of the existing design shape data stored in the new design shape data and the shape DB 11 (hereinafter referred to as the corresponding part). For example, a plurality of feature points are defined with respect to vertices, surfaces, and the like constituting a two-dimensional shape when viewed from the X axis, the Y axis, and the Z axis. Subsequently, the extraction unit 13 calculates a feature amount of the two-dimensional shape based on the plurality of feature points, and then calculates a feature amount of the three-dimensional shape based on the feature amount of the two-dimensional shape. Subsequently, the extraction unit 13 compares the feature quantities of the new design shape creation target part and the existing design shape corresponding part, and resembles the new design shape creation target part and the corresponding part of the existing design shape. A degree is calculated, and an existing design shape having the highest similarity is extracted.

  In addition, the extraction part 13 is based on the size of the shape of the new design shape data and the shape of the existing design shape data memorize | stored in shape DB11, with respect to the existing design shape data memorize | stored in shape DB11. The above-described feature amount may be calculated after performing normalization to align the sizes. By doing so, the shape size corresponding to the existing design shape data stored in the shape DB 11 is matched with the shape size corresponding to the new design shape data, and the shape similarity is accurately obtained. Can be calculated.

  The deformation rule creating unit 14 creates a design shape (new design shape) to be created by the new design shape data received by the receiving unit 12 and the design shape indicated by the existing design shape data extracted by the extracting unit 13. A difference in shape from the corresponding part of (existing design shape) is calculated, and a deformation rule for making the existing design shape close to the new design shape is created based on the calculated difference.

  Specifically, the deformation rule creation unit 14 is performed using the FFD method (Free-Form Deformation method). Here, in the FFD method, a plurality of control points are arranged in a lattice shape in a deformation target space including a deformation target that is a three-dimensional structure, and the plurality of control points are moved to move the deformation target. This is a technique for deforming the form.

  That is, the deformation rule creation unit 14 defines a deformation target space that includes a corresponding part of an existing design shape, arranges a plurality of control points in the deformation target space in a grid pattern, A plurality of feature points indicating the feature of the shape are defined for the design shape creation target part. Here, the feature point is three-dimensional coordinate information, and the feature point of the existing design shape and the feature point of the new design shape are associated with each other. Subsequently, the deformation rule creation unit 14 calculates the difference between the feature points of the existing design shape and the new design shape, and based on the calculated difference, the corresponding part of the existing design shape approaches the creation target part of the new design shape. A plurality of control points are moved to the movement rule, and the movement rule of the plurality of control points is set as a deformation rule.

  Based on the deformation rule created by the deformation rule creation unit 14, the shape data creation unit 15 stores existing inner plate shape data and molding shape data associated with the existing design shape data extracted by the extraction unit 13. By deforming, new inner plate shape data and molding shape data corresponding to the new design shape data are created. If there is existing data associated with the design shape in addition to the inner plate shape data and the molded shape data, the shape data creation unit 15 is similar to the inner plate shape data and the molded shape data for these existing data. By deforming to, data corresponding to new design shape data may be created.

  Specifically, the shape data creation unit 15 refers to the shape data in the shape DB 11 and extracts existing inner plate shape data and molding shape data corresponding to the existing design shape data extracted by the extraction unit 13. Then, for the corresponding portions of the extracted existing inner plate shape data and molding shape data, a deformation target space that includes the shape indicated by these data is defined, and a plurality of control points are arranged in a lattice pattern on the deformation target space. To place. Here, each of the plurality of control points corresponds to the plurality of control points arranged in the deformation target space including the existing design shape in the deformation rule creating unit 14.

  Subsequently, the shape data creation unit 15 indicates the corresponding portions of the existing inner plate shape data and molding shape data based on the deformation rule created by the deformation rule creation unit 14, that is, the movement rule of a plurality of control points. By moving a plurality of control points of the deformation target space including the inner plate shape and the molded shape, the inner plate shape and the molded shape corresponding to the corresponding portions of the existing inner plate shape data and the molded shape data are deformed. Subsequently, the shape data creation unit 15 creates a new internal shape corresponding to the creation target portion of the new design shape data by using the inner plate shape data corresponding to the deformed inner plate shape and the molded shape and the corresponding portion in the molded shape data. Let it be plate shape data and molding shape data.

  That is, based on the deformation rule created by the deformation rule creation unit 14, the shape data creation unit 15 deforms the internal shape and the molding shape indicated by the corresponding portions of the inner plate shape data and the molding shape data included in the existing shape data. Then, the inner plate shape data corresponding to the deformed internal shape and the molded shape and the corresponding portion of the molded shape data are set as the new inner plate shape data and the molded shape data corresponding to the creation target portion of the new design shape data. .

  The combining unit 16 associates the new design shape data received by the receiving unit 12 with the new inner plate shape data and the molding target data created by the shape data creating unit 15, and creates a new Create shape data. The coupling unit 16 aligns the design shape, inner plate shape, and molding shape corresponding to the new design shape data, inner plate shape data, and molding shape data, and displays them on the display unit. Also good.

  When the receiving unit 12 divides the entire new design shape data into a plurality of parts, and each part is received as a creation target part, the shape data creating part 15 performs inner plate shape data corresponding to the plurality of parts and A plurality of molding shape data are generated. In this case, the coupling unit 16 generates inner plate shape data and molding shape data corresponding to the entire new design shape data by combining a plurality of generated inner plate shape data and molding shape data.

  FIG. 3 is a flowchart showing processing in the shape data creation system 1 according to the present embodiment.

  In step S <b> 1 (accepting step), the accepting unit 12 accepts an input of a target site for creating new design shape data via the input unit.

  In step S2 (extraction step), the extraction unit 13 extracts, from the shape DB 11, design shape data having a design shape similar to the design shape indicated by the creation target site of the new design shape data received in step S1.

  In step S3 (deformation rule creation step), the deformation rule creation unit 14 extracts the design shape (new design shape) indicated by the creation target site of the new design shape data received in step S1 and the step S2. The difference in shape with the corresponding part of the design shape (existing design shape) indicated by the design shape data is calculated, and the corresponding part of the existing design shape is brought closer to the creation target part of the new design shape based on the calculated difference. Create transformation rules.

  In step S4 (shape data creation step), the shape data creation unit 15 includes the inner plate shape data associated with the design shape data extracted in step S2 based on the deformation rule created in step S3, and By deforming the inner plate shape and the molding shape indicated by the corresponding portion of the molding shape data, new inner plate shape data and molding shape data corresponding to the creation target portion of the new design shape data received in step S1 are obtained. create.

  In step S5 (joining step), the joining unit 16 creates the new design shape data received in step S1, the new inner plate shape data and the shaping target data created in step S4, To create new shape data.

According to this embodiment, there are the following effects.
(1) The shape data creation system 1 uses the deformation rule creation unit 14 to calculate the difference between the design shape indicated by the new design shape data and the design shape indicated by the existing design shape data, and the calculated difference Based on the above, a deformation rule is created that brings the design shape indicated by the existing design shape data closer to the design shape indicated by the new design shape data. In addition, the shape data creation system 1 uses the shape data creation unit 15 based on the deformation rules created by the deformation rule creation unit 14, the existing inner plate shape data and the molding shape associated with the existing design shape data. By deforming the internal shape and the molded shape indicated by the data, new inner plate shape data and molded shape data corresponding to the new design shape data are created.

  Therefore, since the shape data creation system 1 can create new inner plate shape data and molded shape data necessary for the study of formability in response to the new design shape data, the vehicle of which only the design shape data is designed. In the initial stage of design, design information necessary for studying formability can be created.

  Further, since the formability can be examined from the initial stage of the vehicle design, it is possible to redesign a design shape that is easy to form by feeding back the result of the formability examination to the design shape design. Therefore, the shape data creation system 1 can shorten the product design period and the period until the start of manufacture of the product.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

  For example, the extraction unit 13 extracts existing design shape data including design shape data having a design shape similar to the design shape indicated by the new design shape data received by the reception unit 12 from the shape DB 11. Not limited to this. For example, the extraction unit 13 extracts a plurality of design shape data having a design shape similar to the design shape indicated by the new design shape data received by the reception unit 12 from the shape DB 11, and notifies the operator of the shape data creation system 1 to Any one of the existing design shape data may be selected. Then, the deformation rule creating unit 14 performs deformation based on the design shape indicated by the new design shape data received by the receiving unit 12 and the design shape indicated by the design shape data included in the existing shape data selected by the operator. Rules may be created.

  By doing in this way, the shape data creation system 1 is the operator of the shape data creation system 1 for a plurality of existing shape data having design shape data having a design shape similar to the design shape indicated by the new design shape data. Existing shape data determined to be appropriate can be selected, and new inner plate shape data and molded shape data can be created based on the selected existing shape data.

1 shape data creation system 11 shape DB (storage means)
12 Reception part (reception means)
13 Extraction unit (extraction means)
14 Deformation rule creation unit (deformation rule creation means)
15 Shape data creation unit (shape data creation means)
16 joint

Claims (2)

A shape data creation system for creating predetermined shape data indicating a predetermined shape generated based on the design shape corresponding to the design shape data indicating the design shape of the vehicle,
Storage means for associating and storing existing design shape data and existing predetermined shape data ;
Receiving means for receiving input of new design shape data ;
Extraction means for extracting the existing design shape data indicating the design shape similar to the design shape the indicated new design shape data from the storage means,
Wherein a novel design shape data indicating the design shape, and calculates the difference of the shape of the extracted the existing design shape data indicating the design shape by the extraction means, based on the difference of the calculated, the existing design the modified rule generating means for generating a modified rule to approximate the design shape shown the shape data in the design shape the indicated new design shape data,
Based on the deformation rule created by the deformation rule creating means, the existing predetermined shape data associated with the existing design shape data extracted by the extracting means is deformed to thereby change the new design. A shape data creation system comprising: shape data creation means for creating new predetermined shape data corresponding to shape data. A shape data creation method corresponding to design shape data indicating a design shape of a vehicle , and a shape data creation system for creating predetermined shape data indicating a predetermined shape generated based on the design shape ,
The shape data creation system includes storage means for storing existing design shape data and existing predetermined shape data in association with each other,
A reception step for receiving new design shape data ;
An extraction step of extracting an existing design shape data indicating the design shape similar to the design shape the indicated new design shape data from the storage means,
Wherein a novel design shape data indicating the design shape, and calculates the difference of the shape of the extracted the existing design shape data indicating the design shape in said extraction step, based on the difference of the calculated, the existing design the modified rule creation step of creating a modified rule to approach the design shape shown a design shape indicated by the shape data and the new design shape data,
Based on the deformation rule created in the deformation rule creation step, the existing predetermined shape data associated with the existing design shape data extracted in the extraction step is deformed, whereby the new design A shape data creation method comprising: a shape data creation step for creating new predetermined shape data corresponding to the shape data .

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