JP2017111636A - Design support device and design support method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a design support device and a design support method capable of easily checking gap requirements between two components related to an external projection or an internal projection when a vehicle model is designed on a CAD.SOLUTION: A design support device includes: a three-dimensional data reading section 111 for reading three-dimensional data containing a component model; a gap amount measurement section 114 for measuring an interval between both contact points TP and TP of a virtual test body model that passes through component models 11 and 12 of the read three-dimensional data and its outside as a gap amount (X); an R value measurement section 115 for measuring a radius of curvature at each contact point TP of both component models 11 and 12; an adequacy determination section 116 for determining adequacy for gap requirements from the measured gap amount (X) and the R value; and a determination results output section 118 for outputting determination information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a design support apparatus and a design support method for checking a gap requirement between two parts related to an external protrusion or an internal protrusion in designing a vehicle model or the like.

  FIG. 10 shows a part of the vehicle model (three-dimensional data). The vehicle model 1 shown in FIG. 10 includes parts 2 to 6 (hood, grille, bumper, headlight, fender) at the front. In designing the vehicle model 1, each part is one of the conditions stipulated by laws and regulations (ECE etc.), external projection requirements (ECE26, ECE61 etc.) for the exterior shape, and for the interior shape It is necessary to satisfy the internal protrusion requirements (ECE21 etc.). On the other hand, a relaxation requirement (gap requirement) in consideration of a gap (gap) between two parts is recognized for these protrusion requirements from a design request or the like.

Table 1 shows the gap requirements defined between the parts 2 and 3 (hood and grill) of the vehicle model 1 of FIG. Here, the gap amount (X) indicates a distance between contact points with a test body (a sphere having a diameter of 100 mm) passing between the parts 2 and 3 as shown in the cross-sectional view of FIG.

  According to the gap requirements shown in Table 1, for example, when the gap amount (X) between the parts 2 and 3 exceeds 39 mm, the R value (curvature radius value) of each part 2 and 3 is required to be 2.8 mm or more. When the gap amount (X) is more than 24 mm and 39 mm or less, the gap requirement is satisfied if each R value is 1.3 mm or more. As a result, it is possible to increase the degree of freedom of design while conforming to the regulations.

  In checking whether the vehicle model designer satisfies the gap requirement between the parts of the vehicle model, (1) prepare the vehicle model (three-dimensional data) on the CAD, and (2) the vehicle model on the CAD. Measure the gap amount between the contact points with the specimen passing between the parts, (3) Measure the R value of the contact point, and (4) Based on the measurement results (gap amount, R value) at multiple locations , Judgment on the quality of laws and regulations. However, since the gap amount and R value are measured manually by the designer himself, the number of applicable parts is enormous and the burden on the designer is very large, leading to NG spot extraction errors and measurement errors. There was a risk.

  2. Description of the Related Art Conventionally, there has been known an apparatus and method for measuring a gap between appearance panels of a vehicle body on a vehicle assembly line in a non-contact manner using a CCD camera or the like (see Patent Document 1). According to the apparatus and method, the assembly accuracy of the vehicle body can be measured with high accuracy without stopping the line.

JP 2010-237054 A

  However, the apparatus and method of Patent Document 1 measure a gap between parts of a vehicle body on an actual assembly line, and do not measure a gap between parts on CAD at the vehicle design stage. For this reason, the burden on the design engineer remains the same as before, and when the laws of external projections and internal projections differ from the above regulations depending on the country of the export destination (for example, China is GB11566, GB20182, GB11552, India is IS13942, IS15227, etc. ), Designers had to deal with these legal differences.

  The present invention has been made in view of the above problems, and in designing a vehicle model on CAD, a design support apparatus and a design support method capable of easily checking gap requirements between parts related to external protrusions or internal protrusions The purpose is to provide.

In order to solve the above problems, a design support apparatus according to the present invention provides:
Means for reading three-dimensional data including a plurality of part models from a database;
A gap amount measuring means for measuring, as a gap amount, a contact point between two adjacent part models of the read three-dimensional data and a virtual specimen model passing outside the part model;
A radius-of-curvature measuring means for measuring a radius of curvature at a contact point of each component model,
From the measured gap amount and the radius of curvature, a pass / fail judgment means for judging pass / fail for the set condition,
The main feature is that it includes output means for outputting determination information including a pass / fail determination result.

  Here, the component model is used as a concept including a body model in an object model.

A design support apparatus according to the present invention includes:
When the gap amount measuring means measures a gap between contact points between the two component models and the virtual specimen model, an arbitrary point on the center line through which the virtual specimen model passes is projected. As a second feature, the distance between projection points on each component model is treated as the gap amount.

A design support apparatus according to the present invention includes:
When the radius-of-curvature measuring means measures the radius of curvature at the contact point of each part model, the contact point of each part model and the left and right contact points adjacent in the center line direction of the virtual specimen model are obtained. Based on the spline curve to be connected, each part model generates a contour cutting display line passing through the center contact point along a plane orthogonal to the spline curve, and the center contact point on the obtained contour cutting display line A third feature is that an arc curve passing through three points including two arbitrary points before and after that is generated, and a radius of curvature value at the center contact point is calculated from the obtained arc curve.

A design support apparatus according to the present invention includes:
Gap display line generating means for generating a gap display line between both contact points of each part model;
A fourth feature is that a determination information adding means for adding determination information including a pass / fail determination result to the generated gap display line is provided.

A design support apparatus according to the present invention includes:
The fifth feature is that the determination information added to the gap display line is color information whose color differs depending on the pass / fail determination result or linear information whose line thickness or line type differs depending on the pass / fail determination result.

A design support method according to the present invention includes:
Reading 3D data including a plurality of part models from a database;
Measuring as a gap amount a contact point between two adjacent part models of the read three-dimensional data and a virtual specimen model passing outside the part model;
Measuring a radius of curvature at a contact point of each of the component models,
From the measured gap amount and the radius of curvature value, the step of determining pass / fail for the set condition;
The method includes a step of outputting determination information including a pass / fail determination result.

  As described above, according to the present invention, when designing a vehicle model on CAD, a designer can easily check gap requirements between parts related to external protrusions and internal protrusions on CAD. As in the past, designers can manually reduce the number of gaps between the contact points with the test specimen and R-values by measuring the gaps and R values at multiple locations, thereby significantly reducing design man-hours and time. In addition, there is an excellent effect that design review can be reduced.

The whole system block diagram containing the design support apparatus which concerns on this invention, The flowchart which shows the implementation procedure of the design support method which concerns on this invention, An initial screen diagram for executing the design support method program according to the present invention, Explanatory drawing of the step which projects a projection point from the centerline which a virtual specimen model passes to two parts models, Explanatory drawing of the step of creating a gap display line between the projection points of each part model, Explanatory drawing of the step which measures R value of the projection point of each component model, An auxiliary diagram for explaining the steps of FIGS. Explanatory drawing which shows the method of measuring R value, The figure which shows the example output which includes the pass / fail judgment result of gap requirement between parts, The figure which shows an example of the vehicle model read on CAD, It is explanatory drawing of the measurement location required for gap requirements between the components of the vehicle model of FIG.

  An embodiment for carrying out the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 100 denotes a design support apparatus according to the present invention.

  First, the design support apparatus 100 will be described. In the present embodiment, as shown in FIG. 1, the design support apparatus 100 includes a three-dimensional data reading unit 111, a projecting unit 112, a gap display line generating unit 113, a gap amount measuring unit 114, and an R value measuring unit. 115, a pass / fail determination unit 116, a determination information addition unit 117, a determination result output unit 118, a sectional view creation unit 119, an input / output unit 120, and an arithmetic processing unit 121. The design support apparatus 100 is connected to the design database 200, the input apparatus 300, and the output apparatus 400 via a network line 500.

  The design database 200 includes a three-dimensional shape database 210, a part information database 220, and a design program database 230. The three-dimensional shape database 210 stores part models (hood, front grille, fender, bumper, etc.) including body models as three-dimensional data constituting the vehicle model in the form of a surface model, a solid model, or the like. The part information database 220 stores attribute information of each part model including the body model. The design program database 230 stores various software including a design program for vehicle model design and a design support program for executing the present invention. Note that the data relating to the gap requirements shown in Tables 1 and 2 is stored in the design program database 230.

  In the design support apparatus 100, the 3D data reading unit 111 designs 3D data of a part model including a body model from the 3D shape database 210 of the design database 200 by an operation from the input device 300 (for example, a keyboard). It operates to read into the support device 100. The read three-dimensional data is stored in the memory of the arithmetic processing unit 121.

  In the three-dimensional data read by the execution processing operation from the input device 300 (for example, a keyboard), the projection unit 112 refers to FIG. 4 for a virtual test object for two adjacent component models 11 and 12. A point at a position 50 mm away from an arbitrary point SP on the center line CL through which the model passes in a radial direction orthogonal to the center line CL is projected onto the outer shape display surface of the component models 11 and 12 (projection point TP). The distance between the projection points TP and TP on the component models 11 and 12 is treated as the gap amount (X) between the contact points. The projection point SP is arranged at an equal pitch or an arbitrary pitch.

  The gap display line generation unit 113 performs an execution processing operation from the input device 300 (for example, a keyboard) with reference to FIG. 5, between a pair of opposed projection points TP and TP projected on the component models 11 and 12. Are connected by a straight line, and a gap display line GL is generated between the projection points TP and TP. The gap display line is used as a determination result display line.

  With reference to FIG. 6, the gap amount measurement unit 114 calculates the distance between the projection points TP and TP on the component models 11 and 12 by the execution processing operation from the input device 300 (for example, a keyboard). Measure as The measured gap amount (X) between the part models 11 and 12 is stored in the part information database 220.

  The R value measuring unit 115 measures the R value (curvature radius value) at the projection points (contact points) TP of the component models 11 and 12 with reference to FIG. A specific measurement method will be described later. The measured R value at the projection point of each part model is stored in the part information database 220.

  The pass / fail judgment unit 116 determines the position (gap) passing through each projection point TP of the component models 11 and 12 based on the gap requirement conditions shown in Table 1 from the measurement result by the gap amount measurement unit 114 and the measurement result by the R value measurement unit 115. It is determined whether or not the gap requirement is satisfied for each of the display lines GL. A specific pass / fail determination method will be described later. The determination result of pass / fail is stored in the component information database 220.

  The determination information adding unit 117 adds determination information including a pass / fail determination result to each gap display line GL. An example of determination information to be added is shown in Table 2. Different color information is used as the determination information in Table 2. In Table 2, blue indicates that the gap requirement (see Table 1) is satisfied (determination ◯), and red indicates that the gap requirement is not satisfied (determination ×). The maximum gap amount in the determination section and the minimum gap amount in the determination section may be additionally indicated by different colors (the former is yellow and the latter is light blue).

  The gap display line may have a different thickness as the determination information. For example, a gap display line at a position satisfying the gap requirement is a thick line, and a gap display line at a position not satisfying the gap requirement is a thin line.

  The determination result output unit 118 outputs determination information including the pass / fail determination result to the output device 400. FIG. 9 shows an output example. Designers can see at a glance where gap requirements are not met. The sectional view creation unit 119 creates sectional views of the component models 11 and 12 passing through the projection point TP. The created sectional view can be output to the output device 400. The output device 400 includes a display, a printer, and the like.

  The input / output unit 120 inputs / outputs data to / from an external device, and the arithmetic processing unit 121 performs arithmetic processing when the three-dimensional data reading unit 111 to the cross-sectional view creation unit 119 execute.

  Next, a procedure for checking a gap requirement between component models for a vehicle model design drawing using the design support apparatus 100 will be described with reference to the flowchart of FIG. 2 and FIGS. 3 to 8. 4 to 7 are simplified models of the component models 2 and 3 shown in FIG. The conditions and setting values specifically described below are examples for explaining the embodiment of the present invention, and the present invention is not limited to this.

(Reading 3D data)
First, a designer opens a design support program by an operation from the input device 200, clicks on a data read button B1 on the initial screen G0 in FIG. 3, and 3D data consisting of a plurality of part models from the 3D shape database 210. Is copied into the design support apparatus 100 (step S1). FIG. 4 shows a plurality of component models 11 and 12 that have been read.

(Execution of processing)
Next, when the process execution button B2 is clicked on the initial screen G0 in FIG. 3, first, the projection unit 112 displays a virtual specimen model for the component models 11 and 12, as shown in FIGS. The projection line TL is projected from an arbitrary point SP of the passing center line CL to a position 50 mm away in the radial direction orthogonal to the center line CL (step S2), and the tip of the projection line TL and the external shapes of the component models 11, 12 A position in contact with the display unit is defined as a projection point (contact point) TP.

  Subsequently, as shown in FIG. 5, the gap display line generation unit 113 connects the pair of opposed projection points TP and TP projected on the component models 11 and 12 with straight lines, and the projection points TP and TP. A gap display line GL is generated between them (step S3).

  Subsequently, as shown in FIGS. 6 and 7, the gap amount measuring unit 114 measures the distance between the projection points TP and TP on the component models 11 and 12 as the gap amount (X) (step S4), The R value measuring unit 115 measures the radius of curvature (R value) at each projection point (contact point) TP on the part models 11 and 12 (step S5).

  Referring to FIG. 8, the procedure for measuring the R value by the R value measuring unit 115 will be described in detail. First, the projection point TPc for measuring the R value and the center of the virtual specimen model are measured for one component model 11. A spline curve SL connecting the left and right projection points TP1 and TP2 adjacent to the line CL direction (to the contact point TPc) is generated. Next, as shown in the figure, an outline cutting display line BL passing through the center projection point TPc along the plane F perpendicular to the spline curve SL is generated from the component model 11. Next, a narrow area range A is set along the plane F with respect to the outline cutting display line BL. Next, a total of three points, the center projection point TPc and the two front and rear points P1 and P2, are set on the outer shape cutting display line BL within the range A, and as shown in FIG. Is generated. Finally, the R value of the center projection point TPc is calculated from the arc curve AL. According to the above procedure, the R value of each projection point TPc is also measured for the other component model 12.

  Subsequently, the pass / fail determination unit 116 passes the projection points TP of the component models 11 and 12 based on the gap requirement conditions shown in Table 1 from the measured gap amount (X) and the R value for each projection point TP. For each position, it is determined whether or not the gap requirement is satisfied (step S6).

  Subsequently, the determination information adding unit 117 uses the color information (Table 2) indicating the pass / fail determination result as determination information for the gap display line GL generated between the corresponding projection points TP and TP of the component models 11 and 12. It is added (step S7).

  Subsequently, the determination result output unit 118 outputs determination information including a pass / fail result to the output device 400 (step S8). The designer can click the output condition setting button B4 on the initial screen G0, set the output condition on the condition setting screen (not shown), and output the determination information including the pass / fail result on the display screen.

  The output example shown in FIG. 9 shows the pass / fail result and determination information between the part models 2 and 3 of the vehicle model 1 shown in FIG. The design engineer can immediately recognize the determination result from the vehicle model 1 displayed in the display field S0 of the display screen, the enlarged view (part A detail) displaying the pass / fail result in color, and the determination content list. Then, it is possible to carry out a correction work by examining in detail from an arbitrary sectional view in the determination section. In addition, the character by color (blue etc.) in the enlarged view which displayed the pass / fail result by the color means the color of a projection display line. When the save button B5 on the initial screen G0 is clicked, each information can be saved in a memory or another database.

  In the above-described embodiment, the example of checking the gap requirement between the component models 2 and 3 of the vehicle model 1 has been described. However, not only the specific part but also all combinations between adjacent components included in the vehicle model 1 at a time. You can execute pass / fail judgment and output the result. In this case, the design engineer can check the determination result by color information or the like while rotating the three-dimensional data in the 360 degree direction on the output screen.

  Furthermore, in the above embodiment, color information (blue, red) indicating the pass / fail judgment result is added to the gap display line GL. However, as another embodiment, the measured gap amount (X) and R value are recognized by the color information. You may make it make it. For example, as shown in Table 3, different color information (blue, green, orange) is displayed on the gap display line GL in accordance with the measured gap amount (X), and different color information (blue, green, orange) depending on the measured R value. Orange, pink, and red) may be added. For the latter color information, color information having a fixed width including the projection point is added over the determination section. The design worker can efficiently proceed with the gap requirement determination work while referring to the determination table of Table 3.

  As described above, according to the present invention, the designer can obtain a part that does not satisfy the gap condition for the external collision condition or the internal collision condition between the component models from the detailed diagram with color information indicating the determination result, the determination result list, or the like. The presence or absence of NG can be recognized at a glance, and this can prevent the possibility of NG spot extraction omissions and measurement errors.

  Then, by executing the design support method using the design support apparatus of the present invention, it is possible to save the trouble of performing confirmation work with a large number of cross-sectional views as in the prior art, and to greatly reduce the design time.

  Although the above embodiment is directed to the vehicle model, the application target of the present invention is not limited to this, and can be applied to other models in which a plurality of parts are assembled.

  INDUSTRIAL APPLICABILITY The present invention can be used as a design support apparatus and a design support method used for a work for confirming a gap requirement in an external protrusion or an internal protrusion as a regulation among design work for a vehicle model and the like.

1 Vehicle model (3D data)
2, 3, 4, 5, 6, 11, 12 Parts (part model)
DESCRIPTION OF SYMBOLS 100 Design support apparatus 111 Three-dimensional data reading part 112 Projection part 113 Gap display line production | generation part 114 Gap amount measurement part 115 R value measurement part 116 Pass / fail judgment part 117 Judgment information addition part 118 Judgment result output part 119 Sectional view creation part 120 In Output unit 121 Arithmetic processing unit 200 Design database 210 Three-dimensional shape database 220 Part information database 230 Design program database
300 Input device 400 Output device 500 Network line CL Center line through which the specimen model passes GL Gap display line SL Spline curve BL Outline cutting display line AL Arc curve R Curvature radius SP Point on the center line (projection source)
TP projection point (contact point)
X gap amount

Claims (6)

Means for reading three-dimensional data including two component models to be determined from a database;
A gap amount measuring means for measuring, as a gap amount, a contact point between two adjacent part models of the read three-dimensional data and a virtual specimen model passing outside the part model;
A radius-of-curvature measuring means for measuring a radius of curvature at a contact point of each component model,
From the measured gap amount and the radius of curvature, a pass / fail judgment means for judging pass / fail for the set condition,
A design support apparatus comprising output means for outputting determination information including a pass / fail determination result.   When the gap amount measuring means measures a gap between contact points between the two component models and the virtual specimen model, an arbitrary point on the center line through which the virtual specimen model passes is projected. The design support apparatus according to claim 1, wherein a distance between projection points on each component model is treated as the gap amount.   When the radius-of-curvature measuring means measures the radius of curvature at the contact point of each part model, the contact point of each part model and the left and right contact points adjacent in the center line direction of the virtual specimen model are obtained. Based on the spline curve to be connected, each part model generates a contour cutting display line passing through the center contact point along a plane orthogonal to the spline curve, and the center contact point on the obtained contour cutting display line 3. An arc curve passing through three points including any two points before and after that is generated, and a curvature radius value at the center contact point is calculated from the obtained arc curve. The design support apparatus described. Gap display line generating means for generating a gap display line between both contact points of each part model;
The design support apparatus according to claim 1, further comprising determination information adding means for adding determination information including a pass / fail determination result to the generated gap display line.   5. The design according to claim 4, wherein the determination information added to the gap display line is color information whose color differs depending on the pass / fail determination result or linear information whose line thickness or line type differs depending on the pass / fail determination result. Support device. Reading 3D data including a plurality of part models from a database;
Measuring as a gap amount a contact point between two adjacent part models of the read three-dimensional data and a virtual specimen model passing outside the part model;
Measuring a radius of curvature at a contact point of each of the component models,
From the measured gap amount and the radius of curvature value, the step of determining pass / fail for the set condition;
A design support method comprising a step of outputting determination information including a pass / fail determination result.

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