JP2012164087A - Method of generating two-dimensional drawing of wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of easily generating a 2D drawing of a wiring harness in the form of 3D data.SOLUTION: A reference past figure is extracted from past figures of two-dimensional drawings of the wiring harness, and while a figure frame of the reference past figure and a layout of the same terminal with the wiring harness in the form of the three-dimensional data are left, coordinates of the terminal and a common branch position are acquired. A path connecting those coordinates is automatically plotted to generate a basic two-dimensional drawing, sizes and layout corrections are input to the basic two-dimensional drawing.

Description

  The present invention relates to a method for creating a two-dimensional drawing of a wire harness, and more particularly to a method of creating a two-dimensional drawing from three-dimensional data of a wire harness.

The design of the wire harness routed in the automobile is made by using the 3D design software (3D CAD) on the computer after the in-vehicle position of the main equipment such as the engine to which the wire harness is connected is designed. It is created as three-dimensional data (hereinafter abbreviated as 3D data) of the vehicle mounting state as shown in FIG.
The wire harness is manufactured based on the 3D data of the wire harness. Since the wire harness is manufactured on a wire harness assembly work table referred to as a drawing board, the wire harness manufacturing instruction is shown in FIG. It is necessary to present it in the two-dimensional drawing shown in

Conventionally, the present applicant has provided a wire harness design support method for converting 3D data into 2D data in Japanese Patent Application Laid-Open No. 2003-22721 (Patent Document 1). The support method inputs the three-dimensional data (hereinafter abbreviated as 3D data) to a computer, sets a development plan view to expand two-dimensionally from the input wire harness data, and converts the wire harness data into a plurality of segments. And a two-dimensional conversion step of developing so that all segments are included in the development plan view.
Also, other methods provided for creating a 2D drawing from this type of 3D data often involve various modifications to the 2D drawing data after the 3D data is converted into 2D drawing data.

JP 2003-22721 A

If the support method of the said patent document 1 is used, there will be many places which must be instruct | indicated manually from the characteristic of 2D drawing of a wire harness. For example, identification of trunk lines and branch lines in wire harnesses, transcription of information on components attached to wire harnesses, drawing of wire harnesses to fit within a 2D drawing frame, and description of wire harness dimensions Must be done by work.
As described above, when there are many places to be manually performed by the worker during the conversion work from the 3D data of the wire harness to the 2D drawing, an information transfer mistake is likely to occur. In addition, the 2D drawing has a large figure frame and is difficult to associate with the in-vehicle state, and drawing the wire harness into the 2D drawing requires skilled skills, and the layout of the created drawing varies depending on the worker. There are problems that cannot be standardized.

  The present invention has been made in view of the above problems. After converting the 3D data of the wire harness into 2D data using conversion software, the worker does not modify the 2D data but refers to the 3D data. However, it is standardized so that 2D drawings can be created easily, reducing the occurrence of information transfer mistakes by reducing the number of manual operations by workers, and can also be performed by workers who do not have skill in drawing. At the same time, it is an object to standardize the created 2D drawing.

In order to solve the above problems, the present invention is a method of creating a two-dimensional drawing of a wire harness from three-dimensional data of the wire harness,
A reference past diagram is extracted from the past diagram of the two-dimensional drawing of the wire harness, and the layout of the same terminal as the frame of the reference past diagram and the wire harness of the three-dimensional data is left. Creating a two-dimensional drawing of a wire harness characterized by acquiring coordinates, creating a basic two-dimensional drawing by automatically drawing a route connecting these coordinates, and inputting dimensions and layout correction for the basic two-dimensional drawing Providing a way.

Specifically, a reference past diagram having terminal information that matches terminal information consisting of parts or destinations connected to the trunk and branch terminals of the wire harness of the three-dimensional data is input to the computer,
Create a two-dimensional drawing on the computer, leaving the terminal frame information that matches the frame of the reference past figure and the terminal of the three-dimensional data,
Based on the coordinates of the terminal information of the two-dimensional drawing as a reference, the coordinates of the branch position and the component mounting position common to the three-dimensional data and the reference past figure are acquired at the same position as the coordinates of the reference past figure, and Acquire the coordinates of the branch position and the component mounting position that do not exist in the reference past figure but exist in the three-dimensional data,
Create a basic two-dimensional drawing by automatically creating a route connecting the acquired coordinates,
For the basic two-dimensional drawing created automatically, a layout correction for changing the arrangement of the terminal device arranged at a position where the arrangement is impossible is performed while inputting a dimension.

  Among the devices existing in the three-dimensional data, devices that do not exist in the reference past diagram are displayed outside the created frame on the screen, and are moved and selected in the frame in the correction input step. It is preferable that a branch position that is connected to the route and exists in the three-dimensional data but does not exist in the reference past diagram is automatically figured out from the adjacent acquired coordinates.

In addition, the reference past diagram collates the terminal information of the trunk line and the branch line of the wire harness of the 3D data to be presented with the terminal information of the trunk line and the branch line of the accumulated two-dimensional drawing of the wire harness. A two-dimensional drawing with many matching points of information is extracted and set as a reference past figure.
The collation of the 3D data and the terminal of the stored 2D drawing is performed by registering the 2D drawing data in the recording unit of the computer and extracting the 2D drawing data having a high coincidence ratio between the part number of the terminal information and the destination display. It is preferable to set the reference past chart.
In some cases, it is faster for an operator to extract a reference past chart from past charts stored in paper media than to search for a large number of past charts registered in a computer. Does not have to be used.

  As described above, in the present invention, when a wire harness presented in 3D data is created as a two-dimensional drawing, correction is not performed after converting 3D data into 2D data using conversion software, but is stored in the past. A drawing approximated from the two-dimensional drawings of the wire harness being used is extracted and used as a reference past figure. In other words, a new 2D drawing corresponding to 3D data is created by using the past reference drawing of the two-dimensional drawing.

  In this way, a basic two-dimensional drawing is created using the accumulated past drawings and correction by the operator is minimized, so that information transcription errors can be reduced. In addition, since the figure frame of the past figure is left, the figure frame has an appropriate size, and the layout of the route is appropriately made within the figure frame. Therefore, the skill of creating a 2D drawing from 3D data is possessed. Even those who do not can easily create a 2D drawing according to the above procedure. In addition, the layout of the created 2D drawing does not differ depending on the creator, and standardization of the 2D drawing can be achieved.

As described above, the method for creating a wire harness presented as 3D data according to the present invention as a 2D drawing is characterized in that it is created using a 2D drawing of a wire harness created in the past. This is greatly different from a creation method in which various corrections are made after converting 3D data into a 2D drawing using conversion software. Therefore, if the operator's correction work increases, an information transfer mistake tends to occur. However, since the correction work is reduced as much as possible, the transfer mistake (input mistake at the time of correction) can be reduced.
In addition, the reference past diagram consisting of the past diagram to be used diverts the layout and the coordinates of the same information, defines the creation procedure of the 2D drawing based on the reference past diagram, does not depend on the skill of the operator, Workers who do not have skills can easily create them and work time can be greatly reduced. Furthermore, since the created 2D drawings are standardized, the drawings are easy to see.

1A is a schematic diagram showing three-dimensional data of a wire harness displayed on a computer screen, FIG. 1B is a schematic diagram of a two-dimensional drawing of the wire harness displayed on a computer screen, and FIG. C) is a schematic diagram of a two-dimensional drawing of a newly created wire harness. It is drawing which shows the correspondence table which matches the components attached to the edge part of the wire harness in 3D drawing and 2D drawing. It is drawing which shows a flowchart. It is drawing explaining a 1st process. It is drawing explaining a 2nd process. It is drawing explaining a 3rd process. (A) is drawing which shows the three-dimensional data of a wire harness, (B) is drawing which shows the two-dimensional drawing of a wire harness.

Hereinafter, an embodiment of a method for creating a two-dimensional drawing of a wire harness of the present invention will be described with reference to the drawings.
Basically, the two-dimensional drawing 3 shown in FIG. 1 (C) corresponding to the 3D data 1 of the wire harness composed of the CAD data shown in FIG. 1 (A) is used with reference past FIG. 2 shown in FIG. 1 (B). Have created.

The reference past diagram 2 is selected from a number of past diagrams of the two-dimensional drawing of the wire harness that has already been accumulated and set as a reference past diagram.
The newly created 2D drawing 3 is diverted based on the reference past FIG. 2, leaving the frame of the reference past FIG. 2, and the layout of the same terminal as the wire harness of the 3D data 1 and common coordinates. A basic two-dimensional drawing is created by automatically drawing a path connecting coordinates, and a dimension input and a layout correction are manually input to the basic two-dimensional drawing.

  The computer used to create the 2D drawing of the wire harness has a well-known configuration and has an input unit, a calculation unit, an output unit, a recording unit, etc., and inputs 3D data from the input unit and registers it in the recording unit. ing. The recording unit records 2D drawing data of the wire harness created in the past, and also records the correspondence table shown in FIG. 2, existing drawing software, and the like. In the correspondence table, the information described in the 2D drawing is the information described in the reference past diagram. The output unit is connected to a display device (not shown).

  Next, a process of creating a new 2D drawing corresponding to the 3D data 1 from the 3D data 1 and the reference past FIG. 2 will be described with reference to the flowchart of FIG.

The first process is a terminal matching process of 3D data and 2D drawing shown in FIG.
Prior to this terminal matching step, a 2D drawing as a reference past drawing is extracted from the 2D drawings of many wire harnesses accumulated in the past.
This reference past drawing is extracted from the wire harness of the same routing location as the wire harness presented in the 3D data 1, the terminal information of the wire harness, that is, the part number connected to the terminal and the matching rate of the destination The most past chart is extracted as a reference past chart.
For example, when the wire harness terminal of 3D data 1 is connected to the devices A, B, C, and D, the 2D drawing 2 in which the wire harness terminal is connected to the devices A, B, and E is extracted as the reference past diagram. .

  The collation between the terminal information of the 3D data 1 and the terminal information of the past 2D drawing is performed by collating the past 2D drawing data recorded in the recording unit with the terminal information of the 3D data 1 in this embodiment. The most past 2D drawing data is extracted and set as the reference past figure 2. Note that the extraction of the reference past diagram from the enormous past 2D drawing is not limited to computer search.

  The device D connected to the terminal of the 3D data 1 is different from the terminal E of the reference past FIG. Whether or not they can be identified is determined by the calculation unit based on the correspondence table shown in FIG. 2 recorded in the recording unit.

After extracting and setting the reference past FIG. 2 from the accumulated 2D drawings, in the first step, the frame 4 of the reference past FIG. 2 and the arrangement positions (layouts) of the terminal devices A, B, E are left and used. The devices A, B, and D connected to the wire harness terminal of the 3D data 1 are arranged at the same positions as the terminal devices A, B, and E to create a new 2D drawing 3A shown in FIG.
At that time, the device C connected to the terminal which exists in the 3D data 1 but does not exist in the reference past FIG. 2 is arranged outside the picture frame 4 on the screen.

The second step is a route alignment step shown in FIG.
The branch position P1 and the path component attachment position S common to the 3D data 1 and the reference past FIG. 2 are extracted, and the branch coordinates are determined based on the position coordinates of the terminal devices A, B, and D in the 2D drawing 3A created in FIG. The coordinates (X1, Y1) of the position P1 and the coordinates (X2, Y2) of the component mounting position S are taken in the 2D drawing. The said path | route components point out the protector, a grommet, etc. which are armored on a wire harness.

  Further, although not present in the reference past FIG. 2, the coordinates of the branch point P2 existing in the 3D data 1 are determined from the relationship between the devices A, B, D connected to each terminal, the branch position P1, and the component mounting position S. Acquired by automatic drawing and overwrites the 2D drawing 3B shown in FIG.

The third step is an automatic operation diagram step shown in FIG.
As shown in FIG. 5 in the second step, after obtaining the coordinates of the devices A, B, D connected to the terminal of the wire harness, the coordinates of the branch positions P1, P2, and the coordinate point of the component mounting position S, the third In the process, as shown in FIG. 6, a wire harness path 5 connecting the coordinates is automatically created to create a 2D drawing 3C.

The fourth process is a manual process input by the final worker.
If the placement location of the device that has been automatically operated in the third step cannot be actually placed, a layout correction input for manually moving the location of the device is performed. Moreover, since the dimension of each part is not described, the dimension of each part is input. Thus, a new 2D drawing 3 shown in FIG. 1C is created on the computer.

  When a new 2D drawing 3 is created from the 3D data 1 in the process of the present invention described above, the reference past figure 2 approximated to the 3D data is used as a base, and the figure frame 4, the wire harness terminal position, and the wire harness branch position The basic layout can be used. Therefore, input items by the operator can be reduced, and information transfer mistakes can be reduced. In addition, because it is created in accordance with the specified procedure, even an operator who does not have the skill to create 2D drawings from 3D data can easily create it. Also have.

1 3D data of wire harness 2 Reference past figure 3 Newly created 2D drawing 4 Picture frame 5 Route

Claims (3)

A method of creating a two-dimensional drawing of a wire harness from three-dimensional data of the wire harness,
A reference past diagram is extracted from the past diagram of the two-dimensional drawing of the wire harness, and the layout of the same terminal as the frame of the reference past diagram and the wire harness of the three-dimensional data is left. Creating a two-dimensional drawing of a wire harness characterized by acquiring coordinates, creating a basic two-dimensional drawing by automatically drawing a route connecting these coordinates, and inputting dimensions and layout correction for the basic two-dimensional drawing Method. A reference past diagram having terminal information that matches terminal information consisting of parts or destinations connected to the trunk and branch terminals of the wire harness of the three-dimensional data is input to a computer, Create a two-dimensional drawing on the computer, leaving the terminal information that matches the terminal of the three-dimensional data,
Based on the coordinates of the terminal information of the two-dimensional drawing as a reference, the coordinates of the branch position and the component mounting position common to the three-dimensional data and the reference past figure are acquired at the same position as the coordinates of the reference past figure, and Acquire the coordinates of the branch position and the component mounting position that do not exist in the reference past figure but exist in the three-dimensional data,
Create a basic two-dimensional drawing by automatically creating a route connecting the acquired coordinates,
2. The two-dimensional wire harness according to claim 1, wherein the two-dimensional layout of the wire harness according to claim 1 is input to the automatically created basic two-dimensional drawing by inputting a dimension and changing a layout of a terminal device arranged at a position where it cannot be arranged. Drawing creation method. Among the devices existing in the three-dimensional data, devices that do not exist in the reference past diagram are displayed outside the created frame on the screen, and are moved and selected in the frame in the correction input step. Connected to the route, and
The method for creating a two-dimensional drawing of a wire harness according to claim 2, wherein a branch position that exists in the three-dimensional data but does not exist in the reference past drawing is automatically operated from the adjacent coordinates obtained.

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