JP5029496B2 - Vehicle body design support apparatus and vehicle body design support method - Google Patents

Description

  The present invention relates to a vehicle body design support apparatus and a vehicle body design support method for supporting a vehicle design work, and in particular, a first member (such as a hood) that rotates about a hinge center is a second member ( The present invention relates to a vehicle body design support apparatus and a vehicle body design support method for supporting a check operation as to whether or not rotation is possible without contact with a fender or the like.

  The shape design of each part (hood, fender, door, etc.) constituting the vehicle is performed using a so-called CAD system (for example, see Patent Documents 1 and 2).

  The CAD system is also used to check whether the hood etc. can be opened and closed (rotated) without contacting other parts (without biting other parts) (hereinafter referred to as interference check). Has been done. However, as shown in FIG. 13, the existing CAD system capable of checking the presence or absence of interference has various information about the vehicle (information indicating the shape and position of the design surface, parting line, etc., and the hinge center that is the rotation center of the hood). After performing 3D modeling of the hood and fender based on the position information, etc., create a rotation trajectory plane of the hood based on the 3D modeling result, and whether there is a gap between the created rotation trajectory plane and the fender It is to judge whether or not.

  That is, an existing CAD system that can check for interference can check for interference by inputting information that can be modeled in 3D, but if such information cannot be input (such information has not yet been prepared). Case), it is impossible to check for interference.

  In addition, since the existing CAD system that can perform the interference presence check performs 3D modeling, the interference presence check takes a relatively long time. And if the interference between the fender and the hood interferes with the fender and the hood, it has to be performed again after changing the position of the hinge center, etc. desired.

Japanese Patent No. 4010150 JP-A-10-269254

  Accordingly, an object of the present invention is to check for the presence / absence of interference (determining whether or not the first member (such as a hood) that rotates around the hinge center can rotate without contacting the second member (such as a fender)). Vehicle body design support apparatus and vehicle body design support method that can be performed in a short time, and can be used even when 3D modeling cannot be performed due to lack of information, and vehicle body design It is to provide a support method.

In order to solve the above problems, a vehicle body design support device for determining whether or not a first member rotating around a hinge center is rotatable without contacting the second member is provided. Evaluation target vehicle information storage means for storing evaluation target vehicle information indicating the shapes of the first member and the second member and the positional relationship between the first member, the second member and the hinge center. And based on the evaluation target vehicle information on the evaluation target vehicle information storage means, cutting at a plurality of surfaces intersecting a boundary shape line that is a line indicating a gap shape between the first member and the second member Cross-sectional outline information creating means for creating cross-sectional outline information representing a cross-sectional outline that is the outline of each cut surface of the first member, and each cross-sectional outline information created by the cross-sectional outline information creating means Evaluation vehicle Based on the evaluation target vehicle information on the information storage means, the position of the point having the shortest distance from the hinge center on the cross-sectional outline represented by each cross-sectional outline information is specified, and each point whose position is specified is The scuffing hard line information creating means for creating scuffing hard line information representing a scuffing hard line, the scuffing hard line information created by the scuffing hard line information creating means, and the evaluation target on the evaluation target vehicle information storage means Trajectory plane information creation that creates trajectory plane information representing the trajectory plane of the caulking hard line when the caulking hard line represented by the caulking hard line information is rotated around the hinge center based on vehicle information Means, the trajectory plane information created by the trajectory plane information creation means, and the evaluation target on the evaluation target vehicle information storage means Based on the two information, and judging means for outputting a determination to the determination result whether there is a gap between the track surface and the second member in which the trajectory plane information indicates comprises.

  That is, the vehicle body design support apparatus according to the present invention can check the presence / absence of interference by a relatively simple process that does not require 3D modeling [the first member rotating around the hinge center (such as a hood) is the second. Determination of whether or not rotation is possible without contact with a member (fender or the like). Therefore, this vehicle body design support device is a device that completes the interference presence check in a shorter time than the device that performs the interference presence check after 3D modeling. Further, the vehicle body design support device may not be able to generate a 3D model as long as the information about the first member included in the evaluation target vehicle information can create a plurality of cross-sectional outline information. It is possible to check for interference. For this reason, the vehicle body design support apparatus is also an apparatus that can be used even when 3D modeling cannot be performed due to lack of information.

  When realizing the vehicle body design support device of the present invention, a plurality of surfaces orthogonal to the boundary shape line based on the evaluation target vehicle information on the evaluation target vehicle information storage unit as the cross-sectional outline information creation unit It is possible to employ means for creating cross-sectional outline information representing the cross-sectional outline of each cut surface of the first member cut in step S2.

  Further, the vehicle body design support apparatus according to the present invention may be configured such that, for each cross-section outline information created by the cross-section outline information creation means, the cross-section outline indicated by the cross-section outline information is designated. Further comprising second cross-sectional outline information generating means for generating second cross-sectional outline information representing the second cross-sectional outline moved by the distance specified in FIG. It can also be realized as a “device that is a means for processing each second cross-sectional outline information created by the two cross-sectional outline information creating means”. In other words, the vehicle body design support apparatus according to the present invention is realized as an apparatus for checking the presence / absence of interference in consideration of so-called variation in construction (difference between the position of the sectional outline and the position of the second sectional outline). You can also keep it.

  Further, if the determination means of the vehicle body design support device is a means having a function of displaying an image showing the locus plane and the second member on the display device, the operator can be displayed on the display device. Therefore, it is possible to realize a vehicle body design support apparatus that can easily grasp a part (a part that needs to be corrected) that interferes with an image.

According to the present invention, there is provided a vehicle body design support method for determining whether or not a first member rotating around a hinge center is rotatable without contacting the second member. Based on the evaluation target vehicle information indicating the shape of one member and the second member and the positional relationship between the first member, the second member, and the hinge center, between the first member and the second member. A cross-section outline information creation step for creating cross-section outline information representing a cross-section outline that is an outline of each cut surface of the first member cut at a plurality of surfaces that intersect with a boundary shape line that is a line indicating a gap shape; The distance from the hinge center on the cross-section outline represented by each cross-section outline information is the shortest based on each cross-section outline information created by the cross-section outline information creation step and the evaluation object vehicle information. A caulking hard line information creating step for creating a caulking hard line information representing a caulking hard line through each point where the position is identified, and the caulking hard line created by the caulking hard line information creating step Based on the information and the evaluation target vehicle information, the trajectory plane information representing the trajectory plane of the caulking hard line when the caulking hard line represented by the caulking hard line information is rotated around the hinge center is created. The trajectory plane information creating step, the trajectory plane information created by the trajectory plane information creation step, and the evaluation target vehicle information, and the trajectory plane represented by the trajectory plane information and the second member And a determination step of determining whether or not there is a gap between them and outputting a determination result.

  Therefore, this vehicle body design support method can be used even when interference check can be performed in a short time and when 3D modeling cannot be performed due to lack of information.

  According to the present invention, the presence / absence check of interference [determination of whether or not the first member (such as a hood) that rotates about the hinge center can rotate without contacting the second member (such as a fender)) takes a short time. BODY BODY DESIGN SUPPORT DEVICE AND VEHICLE BODY DESIGN SUPPORT METHOD which can be used when the 3D modeling cannot be performed due to lack of information. Can be provided.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As schematically shown in FIG. 1, a vehicle body design support apparatus 10 according to an embodiment of the present invention includes a vehicle (so-called computer / computer system) including a computer main body 11, a keyboard, a display 12, and the like. This is a device in which a body design support program is installed.

  The vehicle body design support program is a program that causes a device including the computer main body 11, a keyboard, and the like to function as a device that can execute various types of interference presence / absence determination processing (that is, the vehicle body design support device 10).

  Each interference presence / absence determination process executed by the vehicle body design support apparatus 10 (vehicle body design support program) is performed by a specific opening / closing member (a member that opens and closes / rotates, such as a fender and a door) provided by the vehicle. This is a process (a process prepared for each open / close member) for determining whether or not it can be opened / closed without touching (without biting other members).

  Each interference presence / absence determination process that can be executed by the vehicle body design support apparatus 10 is essentially the same content / same procedure. Therefore, hereinafter, only the contents of the hood interference presence / absence determination process (hereinafter referred to as the hood interference presence / absence determination process) executed by the vehicle body design support apparatus 10 will be described.

  The hood interference presence / absence determination process executed by the vehicle body design support apparatus 10 is a process of the procedure shown in FIG.

  That is, when this hood interference presence / absence determination process is started, the vehicle body design support device 10 is first stored in vehicle information designated by the operator (a device / medium accessible by the vehicle body design support device 10). The evaluation target vehicle information reading process (step S101) is performed on the RAM in the apparatus as evaluation target vehicle information.

  Vehicle information (information consisting of data indicating the shape and positional relationship of each part of the vehicle / vehicle design data) that needs to be read by the vehicle body design support apparatus 10 during this evaluation object vehicle information reading process is an existing one. Information having the same configuration (data structure). For this reason, although detailed description of the vehicle information is omitted, the hood interference presence / absence determination process (the process of FIG. 2) is performed at least if vehicle information indicating the shape and positional relationship of each part around the hood is input (if it is read). ) Good processing. Further, the hood interference presence / absence determination process is a process in which, even if vehicle information that cannot be 3D modeled is input, vehicle information that cannot be 3D modeled because of incompleteness may be input.

  The vehicle body design support apparatus 10 that has finished the evaluation target vehicle information reading process performs a process of specifying the evaluation target range (step S102) based on the evaluation target vehicle information on the RAM. The process of step S102 is a process of specifying a range as shown in FIG. 3 as an evaluation target range. That is, the process of step S102 is performed from the entire range of the hood / fender boundary shape line (the line connecting the points closest to the fender on the surface of the hood facing the fender) indicating the shape of the gap between the hood and the fender. , And specify the evaluation target range excluding the range where the hood / fender boundary shape line on the side away from the hinge center is a straight line (that is, the range where it is clear that interference / galling does not occur) It is processing.

  The vehicle body design support device 10 that has specified the evaluation target range, based on the evaluation target vehicle information, provides a plurality of cross-sectional outline information for each of the portion within the evaluation target range of the hood and the portion within the evaluation target range of the fender. The creation process (step S103) is performed.

  The cross-sectional outline information created in the process of step S103 is the fender of the cross-section obtained by cutting the hood / fender along a plane orthogonal to the portion within the evaluation target range of the hood / fender boundary shape line. / It is information representing an outline (hereinafter referred to as a cross-sectional outline) on the side facing the hood. And the process of step S103 is a process which produces such cross-sectional outline information so that each cross section may become substantially equal intervals, as typically shown in FIG.

  The vehicle body design support apparatus 10 that has finished the processing of step S103, based on the created cross-sectional outline information group related to the hood, the number and contents of the second type cross-section outline information according to the set variation consideration condition information. A process of creating a group (step S104) is performed.

  Here, the variation-considering condition information is information including several (0 or more) element condition information information that specifies the moving direction, the moving distance, and the rotation angle. This variation consideration condition information is information that can be set by the operator for the vehicle body design support apparatus 10, and the process of step S <b> 104 is performed for each element condition information in the variation consideration condition information. "The second type cross-sectional outline representing a line segment obtained by translating and / or rotating the cross-sectional outline represented by each cross-section outline generated in the process of step S103 under the condition indicated by the element condition information. “Create line information” process.

The vehicle body design support apparatus 10 that has finished the processing of step S104, for each cross-sectional outline information group (original cross-section outline information group, second-type cross-section outline information group) related to the created hood, Processing to create the squeeze hard line information representing the squeeze hard line that passes through each scouring hard point from the obtained coordinate group on the cross-sectional outline represented by the information and finds the squeeze hard point coordinate closest to the hinge center S105) is performed.

  In other words, the vehicle body design support apparatus 10 generates the staking hard line information representing the scouring hard line (a line passing through all the scouring hard points) as shown in FIG. Process to create about.

  The vehicle body design support apparatus 10 that has finished the process of step S105 performs the squeeze hardware represented by the squeeze hardware line information for each squeeze hardware line information created based on the cross-sectional outline information or the second type cross-sectional outline information. A process (step S106) for creating scuffing hardware surface information (corresponding to the trajectory surface information of the present invention) representing a trajectory surface (hereinafter referred to as a scuffing hard surface) obtained by rotating the line around the hinge center. Do.

  That is, in this step S106, scuffing hardware surface information representing a scuffing hard surface having a shape as shown in FIG. 6 is created for each scoring hard line information.

  The vehicle body design support apparatus 10 that has finished the process of step S106 determines whether or not there is a gap between the frayed fender and the frayed hardware surface represented by the flawed hardware surface information for each generated flawed hardware surface information. The process of determining (Step S107) is performed. The process of step S107 is a process of checking the positional relationship between the galling hard surface and each cross-sectional shape line related to the fender, as shown in FIG. As shown in FIGS. 8 and 9, the process of step S107 is performed when there are gaps between all cross-sectional shape lines and the galling hard surface (FIG. 8). If there is a cross-sectional shape line that does not have a gap between the galvanized hard surface (Fig. 9), it is determined that there is a gap between the galvanized hard surface and the fender. This is a process for determining that there is no gap (interference / galling).

  After completing the process in step S107, the vehicle body design support apparatus 10 performs a process result display process (step S108).

  This processing result display processing is processing for displaying the processing result (determination result) of step S107 on the screen of the display 12 together with element condition information and the like for each piece of hardware surface information. Note that in the processing result display processing, when an operation for selecting a certain determination result is performed, an image showing a galling hardware surface and a fender represented by galling hardware surface information from which the determination result is obtained. For example, an image as shown in FIG. 10 or FIG. 11 is displayed on the screen of the display 12.

  The vehicle body design support apparatus 10 performs this process result display process when an instruction to end the hood interference presence determination process or a vehicle information correction start instruction is input (the operation associated with each instruction). Exit).

  When the vehicle body design support apparatus 10 finishes the processing result display process by inputting the correction start instruction for the vehicle information (step S109; correction), the evaluation target for correcting the evaluation target information on the RAM according to the operator's instruction After performing vehicle information correction processing (step S110), the processing after step S102 is started. Then, when the vehicle body design support apparatus 10 ends the processing result display process by inputting an instruction to end the hood interference presence / absence determination process (step S109; end), the hood interference presence / absence determination process (the process of FIG. 2) is performed. ) Ends.

As is clear from the above description, the vehicle body design support apparatus 10 according to the present embodiment checks the presence / absence of interference by a relatively simple process (FIG. 2) that does not require 3D modeling. And determining whether or not the hood rotating at the center is rotatable without contacting the fender. Therefore, if this vehicle body design support device 10 is used, the presence / absence check of interference is completed in a shorter time than the case of using a device that performs the presence / absence check of interference after 3D modeling. In addition, the vehicle body design support device 10 can detect the presence or absence of interference as long as the information about the hood included in the evaluation target vehicle information can generate a plurality of cross-sectional outline information even if the 3D model cannot be generated. It is a device that can check. Therefore, if the vehicle body design support device 10 is used, it is possible to check for interference even when 3D modeling cannot be performed due to lack of information.

  In addition, if the vehicle body design support apparatus 10 sets variation consideration condition information (some element condition information), as schematically shown in FIG. 12, the interference in the case where there is no installation error. In addition to the presence / absence check, the device performs an interference presence / absence check when there is an installation error. For this reason, if this vehicle body design support device 10 is used, it is possible to design a vehicle that does not cause a problem when opening and closing a fender or the like even if there is a variation in construction.

  Furthermore, the vehicle body design support apparatus 10 has a function of displaying images as shown in FIGS. 10 and 11. Therefore, if the vehicle body design support apparatus 10 is used, the interfering portion (the portion that needs to be corrected; see FIG. 11) can be easily grasped.

<Deformation>
The above-described vehicle body design support apparatus 10 can perform various modifications. For example, the vehicle body design support apparatus 10 is used as cross-sectional shape line information about the hood, and the normal line from the plane parallel to the hinge center (intersection with the hood (a point corresponding to a galling hard point) passes through the hinge center. It is possible to change to an apparatus for creating information that represents the outline of the cross section obtained by cutting along a plane. However, since general vehicle information is more easily obtained from the cross-sectional shape line information, it is preferable to create the cross-sectional shape line information.

1 is an external view of a vehicle body design support apparatus according to an embodiment of the present invention. 4 is a flowchart of a hood interference presence / absence determination process that can be executed by the vehicle body design support apparatus according to the embodiment. It is explanatory drawing of the evaluation object range specified at the time of the hood interference presence determination process. It is explanatory drawing of the cross-sectional outline information created at the time of the hood interference presence determination process. It is explanatory drawing of the galling hard line information produced at the time of the hood interference presence determination process. It is explanatory drawing of the galling hardware surface information produced at the time of the hood interference presence determination processing. It is a figure for demonstrating the processing content of step S107 during the interference determination process for hoods. It is a figure for demonstrating the processing content of step S107 during the interference determination process for hoods. It is a figure for demonstrating the processing content of step S107 during the interference determination process for hoods. It is the figure which showed an example of the image displayed by the interference presence determination process for hoods. It is the figure which showed the other example of the image displayed by the interference presence determination process for hoods. It is explanatory drawing of the function which the body design support apparatus for vehicles has. It is a flowchart for demonstrating the interference presence / absence check procedure by the conventional CAD system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Vehicle body design support apparatus 11 ... Computer main body 12 ... Display

Claims (5)

A vehicle body design support device for determining whether or not a first member rotating around a hinge center is rotatable without contacting the second member,
Evaluation target vehicle information storage means for storing evaluation target vehicle information indicating the shapes of the first member and the second member and the positional relationship between the first member, the second member and the hinge center; ,
Based on the evaluation target vehicle information on the evaluation target vehicle information storage means, the first section cut at a plurality of surfaces intersecting a boundary shape line that is a line indicating a gap shape between the first member and the second member. Cross-section outline information creating means for creating cross-section outline information representing a cross-section outline that is an outline of each cut surface of one member;
The hinge on the cross-section outline represented by each cross-section outline information based on each cross-section outline information created by the cross-section outline information creation means and the evaluation target vehicle information on the evaluation target vehicle information storage means A galling hard line information creating means for identifying a position of a point having the shortest distance from the center and creating a galling hard line information representing a galling hard line through each point where the position is specified,
Based on the scuffing hard line information created by the scuffing hard line information creation means and the evaluation target vehicle information on the evaluation target vehicle information storage means, the scuffing hard line information represented by the scuffing hard line information Trajectory surface information creating means for creating trajectory surface information representing the trajectory surface of the galling hard line when rotated around the hinge center;
Based on the locus surface information created by the locus surface information creation means and the evaluation object vehicle information on the evaluation object vehicle information storage means, the locus surface represented by the locus surface information, the second member, A vehicle body design support apparatus comprising: a determination unit that determines whether or not there is a gap between the two and outputs a determination result. The cross-sectional outline information creating means
Based on the evaluation object vehicle information on the evaluation object vehicle information storage means, cross-sectional outline information representing a cross-section outline for each cut surface of the first member cut by a plurality of surfaces orthogonal to the boundary shape line. The vehicle body design support apparatus according to claim 1, wherein the vehicle body design support apparatus is a means for creating. For each cross-section outline information created by the cross-section outline information creation means, a second cross-section obtained by translating the cross-section outline represented by the cross-section outline information by a designated distance in the designated direction A second cross-section outline information creating means for creating second cross-section outline information representing the outline, further comprising:
3. The vehicle according to claim 1, wherein the galling hard line information creation unit is a unit that also processes each second cross-sectional outline information created by the second cross-sectional outline information creation unit. Body design support device. The determination means is
The vehicle body design support according to any one of claims 1 to 3, wherein the vehicle body design support has a function of displaying an image showing the locus plane and the second member on a display device. apparatus. A vehicle body design support method for determining whether or not a first member rotating around a hinge center is rotatable without contacting a second member,
On the computer,
Based on the vehicle information to be evaluated indicating the shapes of the first member and the second member and the positional relationship between the first member, the second member, and the hinge center, the first member and the second member. Cross-section outline information creation that creates cross-section outline information that represents a cross-section outline that is an outline of each cut surface of the first member cut at a plurality of surfaces that intersect a boundary shape line that is a line that indicates a gap shape between Steps,
The position of the shortest distance from the hinge center on the cross-sectional outline represented by each cross-section outline based on each cross-section outline information created by the cross-section outline information creating step and the evaluation object vehicle information A galling hard line information creation step for creating galling hard line information representing a galling hard line through each point whose position has been identified,
When the galling hard line represented by the galling hard line information is rotated around the hinge center based on the galling hard line information and the evaluation target vehicle information created by the galling hard line information creating step. A trajectory plane information creating step for creating trajectory plane information representing a trajectory plane of the caulking hard line in
Whether there is a gap between the trajectory surface represented by the trajectory surface information and the second member based on the trajectory surface information created by the trajectory surface information creation step and the evaluation target vehicle information A vehicle body design support method, comprising: performing a determination step of determining the above and outputting a determination result.

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