JP3875876B2 - Wire harness manufacturing CAD system and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a WH manufacturing CAD system and program for creating manufacturing drawing data from product / part specification data of an automotive wire harness (hereinafter referred to as “WH”). , A 3D (hereinafter referred to as “3D”) data, and a WH production CAD system and program for converting the data into conversion data for creating a two-dimensional (hereinafter referred to as “2D”) manufacturing drawing.
[0002]
[Prior art]
Conventionally, the manufacturing process of WH has been mainly manual assembly on a flat assembly drawing board. Therefore, the conventional specification drawings and WH manufacturing drawings necessary for manufacturing WH are WH specification at the time of manufacturing. Is a WH-specific 2D drawing having the following descriptive specifications.
(1) Describe the circuit arrangement in the connector, which is circuit assembly information.
(2) Frame the WH shape on a free scale so that it fits in the figure frame, and describe the dimensions, contents of exterior processing, part names, etc. on the line.
(3) If necessary, express the branching direction of the WH and the component mounting direction as a diagram.
[0003]
Therefore, a 2D WH manufacturing drawing creation CAD system that can efficiently create a 2D WH manufacturing drawing that satisfies the above-described conditions from a given specification has already been developed (Shiizuka et al., “Wire Harness CAD System”). Fujikura Electric Wire Technical Report 69, pp 21-29, 1985).
[0004]
[Problems to be solved by the invention]
By the way, in recent years, automobile manufacturers have entered the practical stage of digital process development that converts product and part specifications into digital information and performs design development with 3D digital modeling, shortening the development period, reducing the number of prototypes, centralizing information, making paperless Etc. are getting results. Along with this, the specifications of WH are also being managed in a unified manner with 3D digital information. However, since the above-described conventional 2D WH manufacturing drawing creation CAD system does not support 3D CAD data, 2D production CAD data is generated from 3D CAD data at the manufacturing site where WH is created. The need has arisen.
[0005]
The present invention has been made in view of the above points, and allows a 3D CAD data as an input to a conventional WH manufacturing CAD system, and further improves the working efficiency of the CAD system and program. The purpose is to provide.
[0006]
[Means for Solving the Problems]
The CAD system for WH manufacturing according to the present invention includes 3D shape information indicating a wiring state of WH, circuit information indicating a connection state of various electrical components via the WH, a method of attaching a component to the WH, an exterior processing method, and the like. 3D CAD data fetching means for fetching 3D CAD data including attribute information that is annotated information on manufacturing, and 3D model reproduction means for reproducing the 3D model of the WH based on 3D shape information of the fetched 3D CAD data 3D-2D model expansion means for expanding the reproduced 3D model of the WH into a 2D model, 2D model correction means for correcting the expanded 2D model of the WH according to an operator's correction operation, and the corrected 2D A part symbol and necessary text information are attached to the model based on the circuit information and attribute information of the 3D CAD data. Then, a 2D base drawing creating means for creating the 2D base drawing of the WH, and a manufacturing drawing for creating conversion data for creating a manufacturing drawing of the WH based on the created 2D base drawing and attribute information of the 3D CAD data It is characterized by comprising conversion data generation means for creation.
[0007]
The CAD program for WH production according to the present invention includes 3D shape information indicating a wiring state of the WH, circuit information indicating a connection state of various electrical components via the WH, a component mounting method to the WH, and exterior processing. 3D CAD data capturing step for capturing 3D CAD data including attribute information that is annotated information relating to manufacturing such as a method, and 3D model reproduction for reproducing the 3D model of the WH based on 3D shape information of the captured 3D CAD data A 3D-2D model expansion step for expanding the reproduced 3D model of the WH into a 2D model, a 2D model correction step for correcting the expanded 2D model of the WH according to an operator's correction operation, and the correction In addition, a component symbol and a 2D model are added to the 2D model based on the circuit information and attribute information of the 3D CAD data. A 2D base drawing creation step for creating a 2D base drawing of the WH by adding necessary text information, and a conversion for creating a manufacturing drawing of the WH based on the created 2D base drawing and attribute information of the 3D CAD data It is characterized by causing a computer to execute a manufacturing drawing creation conversion data generation step for creating data.
[0008]
According to the present invention, a 3D model reproduced from WH 3D CAD data is developed to obtain a 2D model, and correction by an operator is possible at the stage of the 2D model. Easy to handle. In addition, since a 2D base drawing is created by adding a part symbol and necessary text information based on circuit information and attribute information included in the 3D CAD data to the 2D model after correction, the 2D base drawing is created at this stage. Data transfer to a CAD system for creating manufacturing drawings is facilitated, and creation of 2D manufacturing drawings becomes extremely easy.
[0009]
In addition, when importing 3D CAD data, adding a function to generate a specification difference list of circuits and parts compared to previously acquired 3D CAD data, it is possible to easily grasp the changed part when there is a design change. It can be used as physical quantity data when confirming cost fluctuations.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a CAD system for WH production according to an embodiment of the present invention.
This system includes an interface (I / F) 1 that receives WH3DCAD data sent from the outside, a WH3D-2D conversion CAD system 2, a WH manufacturing drawing creation CAD system 3, and a plotter 4 as an output device. And are connected to each other via a LAN (Local Area Network) 5.
[0011]
FIG. 2 is a block diagram of functions realized by the CPU, the memory, and a necessary WH3D-2D conversion program of the WH3D-2D conversion CAD system 2.
The WH3D CAD data 11 input as input data to the system via the I / F 1 is read into the system by the 3D reading unit 12. The WH3DCAD data 11 includes 3D shape information indicating the wiring state of the WH, circuit information indicating the connection state of various electrical components via the WH, and a note regarding manufacturing such as a component mounting method to the WH and an exterior processing method. And attribute information that is information. The 3D model reproduction unit 13 reproduces a WH 3D conversion CAD model (hereinafter simply referred to as “3D model”) 14 based on the 3D shape information of the 3D CAD data, and displays it on the display device 2a and the like. The specification difference list generation unit 15 generates a circuit list file / parts list file 16 based on the circuit information and attribute information when the 3D CAD data 11 is imported, and generates from the list file 16 and the previously acquired 3D CAD data. The circuit list file / part list file 17 thus generated is compared to generate a specification difference list of the circuit and parts.
[0012]
The 3D-2D model development unit 18 develops a 2D model from the 3D model reproduced by the 3D model reproduction unit 13. An expanded 2D CAD model (hereinafter simply referred to as “2D model”) can be appropriately corrected by an operator using an input unit 20 such as a mouse or a keyboard in a 2D model correction unit 19. The developed and modified 2D model 21 is displayed on the display device 2a or the like. The 2D base drawing creation unit 22 extracts part symbols and necessary text information from the 2D detail library 23 on the basis of the circuit information and attribute information of the read 3D CAD data, adds them to the 2D model 21 and adds them to the 2D base. A figure CAD model (hereinafter simply referred to as a “2D base diagram”) 24 is generated. The WH manufacturing drawing creation CAD data conversion unit 25 creates the WH manufacturing drawing creation CAD conversion data 26 based on the 2D base diagram 24 and the attribute information of the 3D CAD data 11.
[0013]
Next, the operation of the WH3D-2D conversion CAD system 2 configured as described above will be described. FIG. 3 is a main flowchart of the 3D-2D conversion program constituting the system 2.
(1) 3D data import processing and specification difference list creation First, WH3D CAD data is captured, and a WH3D model is reproduced from the WH3D CAD data, and a specification difference list is created (S1). FIG. 4 is a flowchart showing details of this processing. A 3D CAD element applicable to the present system is created from the 3D shape information of the 3D CAD data (S11). An example of the reproduced 3D model is shown in FIG.
[0014]
Next, a component list is created by extracting component elements from the attribute information of the 3D CAD data (S12), and a circuit list is created by extracting circuit elements from the circuit information of the 3D CAD data (S13). Next, it is referred whether or not a circuit list file having the same drawing number as the generated circuit list is specified (exists) in the circuit list file / part list file 17 (S14). Then, circuit specification difference list data is created (S15). Similarly, it is checked whether or not a parts list file having the same drawing number as the generated parts list is designated (exists) in the circuit list file / parts list file 17 (S16). Then, component comparison list data is created (S17).
[0015]
The specification difference list and the component comparison list are used to confirm whether the design change is incorporated even when the design change has occurred and the changed part is not revealed on the imported D model or 2D base diagram. List. It can also be used as quantity data when confirming cost fluctuations due to design changes.
[0016]
(2) 3D-2D development processing Next, the 3D model is developed into a 2D model suitable for the WH manufacturing drawing (S2). In the 2D model, WH is linearized on an actual scale. As shown in FIG. 5, the WH is assembled in a vehicle so as not to be interfered with an electrical component or a body / trim cover, or to be bent irregularly or twisted in some cases. In the 3D-2D model development, the non-linear WH is linearized in consideration of the branching direction and mounting of fixed parts so that the WH manufactured in the 2D shape becomes the same shape as the 3D model when the vehicle is assembled. Extend to 2D.
[0017]
Here, when developing a WH 3D model into a 2D model, it is necessary to consider the effect of twisting and the like. That is, for example, when a branch standing perpendicular to the 2D development plane is tilted, adjacent branches have a twisting effect, and therefore it is necessary to consider chain twisting. In addition, the direction of the fixed part attached between the branches is affected by the twisting of the WH trunk line that occurs when one branch is tilted, but the influence of the twist differs depending on the positional relationship between the starting point of the twist and the branch to be tilted, It is necessary to predict that. Further, it is desirable that the development surface of the WH coincide with the surface of the body to which the WH is fixed. However, when the WH is fixed to a plurality of different fixed surfaces, the setting of the development surface is further complicated. As described above, the method for discriminating the branching direction of WH and the component mounting direction is complicated. For this reason, in this system, the operator has a step of appropriately correcting the layout of the 2D model using the input unit 20 (S3). If the 3D model and the 2D model are simultaneously displayed on the display device 2a or the like, the operator can correct the 2D model while viewing the 3D model.
[0018]
(3) Creation of 2D base diagram Next, a 2D base diagram is created from the modified 2D model (S4). The purpose of this processing is to convert circuit information and attribute information included in the 3D CAD data into a notation that matches the manufacturing drawing specifications of the WH manufacturing drawing creation CAD system 3, and finally all the necessary information is on the CAD system 3 side. It is to create a 2D base diagram suitable for creating conversion data to be transferred to. FIG. 6 is a detailed flowchart of the 2D base diagram creation process.
[0019]
First, text information of a note is extracted from the attribute information of 3D CAD data, and a text element for the CAD system 2 is created (S21). Next, the type of the exterior part is determined from the attribute information, the symbol of the exterior part is created with reference to the 2D detail library 23, and the object section is drawn, and the part name of the exterior part and the text information of the annotation are obtained from the attribute information. And a text element for the CAD system 2 is created (S22). Subsequently, text information of circuit information such as circuit specifications and terminal information and text information of joint information are extracted from the circuit information and attribute information, and a text element for the CAD system 2 is created (S23). Next, a text element having a section length is created from attribute information relating to the section element, exterior element, and the like (S24). Similarly, a text element of a connector name / auxiliary machine name is created from 3D CAD data (S25), a fixed part symbol is generated, and a fixed part text element is created (S26).
[0020]
An example of a 2D base diagram generated by the above processing is shown in FIG. As described above, the 2D base diagram is completed by adding connectors, exterior parts, fixed parts, and the like from the circuit information and attribute information of the 3D CAD data to the 2D model.
[0021]
(4) WH Manufacturing Drawing Creation CAD Data Conversion Next, WH manufacturing drawing creation CAD conversion data is generated from the obtained 2D base diagram (S5). FIG. 8 is a detailed flowchart of this conversion data creation processing. The record of each information created here is intermediate format data that can be handled by the subsequent WH manufacturing drawing creation CAD system 3. Each record is created by extracting from the circuit information and attribute information of the 3D CAD data.
The created records are a set record (S31) indicating a set of group IDs for each single drawing, a section record (S32) indicating section information, a branch record (S33) indicating branch information, and a connector record (S34) indicating connector information. Part record (S35) indicating part information, Tube record (S36) including tube-type part information among exterior parts, Tape record (S37) indicating tape exterior information among exterior parts, Joint extracted from circuit information The record (S38), the circuit record (S39) extracted from the circuit information, and the note record (S40) extracted from the attribute information.
[0022]
When this WH manufacturing drawing creation CAD conversion data is transferred to the WH manufacturing drawing creation CAD system 3, a WH manufacturing drawing as shown in FIG. In this drawing, the WH shape is framed, and the exterior parts and taping sections are represented by symbols. In the system 3, production information such as component usage and electric wire processing is analyzed and obtained from this WH manufacturing drawing.
[0023]
【The invention's effect】
As described above, according to the present invention, a 3D model reproduced from WH 3D CAD data is developed to obtain a 2D model, and correction by the operator is possible at the stage of the 2D model, so the influence of twisting It is easy to deal with complicated events such as, and a 2D base drawing is created by adding a part symbol and necessary text information to the 2D model after correction based on circuit information and attribute information included in the 3D CAD data. Therefore, at the stage of creating the 2D base drawing, data can be easily transferred to the CAD system for producing the manufacturing drawing, and the production of the 2D manufacturing drawing is extremely facilitated.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a CAD system for WH production according to an embodiment of the present invention.
FIG. 2 is a block diagram of functions of a WH3D-2D conversion CAD system in the system.
FIG. 3 is a main flowchart of a WH3D-2D conversion program in the same system.
FIG. 4 is a detailed flowchart of 3D CAD data import processing, 3D model reproduction, and specification difference list creation processing in the program.
FIG. 5 is a diagram showing an example of a 3D model reproduced by the same processing.
FIG. 6 is a detailed flowchart of 2D base diagram creation processing in the program;
FIG. 7 is a diagram showing an example of a 2D base diagram created by the same processing.
FIG. 8 is a detailed flowchart of WH manufacturing drawing creation CAD data conversion processing in the program;
FIG. 9 is a diagram showing an example of a WH manufacturing drawing finally created in the system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Interface, 2 ... WH3D-2D conversion CAD system, 3 ... WH manufacturing drawing creation CAD system, 12 ... 3D reading part, 13 ... 3D model reproduction part, 15 ... Specification difference list creation part, 17 ... Circuit list file and parts List file 18 ... 3D-2D model development unit 19 ... 2D model modification unit 20 ... input unit 22 ... 2D base drawing creation unit 23 ... 2D detail library 25 ... WH draft drawing creation CAD data conversion unit

Claims (4)

Three-dimensional shape information indicating the wiring harness wiring state, circuit information indicating the connection state of various electrical components via the wire harness, and noteworthy information on manufacturing such as how to attach components to the wire harness and how to treat the exterior Three-dimensional CAD data fetching means for fetching three-dimensional CAD data including attribute information,
3D model reproduction means for reproducing a 3D model of the wire harness based on 3D shape information of the captured 3D CAD data;
A three-dimensional-two-dimensional model expansion means for expanding the reproduced three-dimensional model of the wire harness into a two-dimensional model;
Two-dimensional model correction means for correcting the two-dimensional model of the deployed wire harness according to an operator's correction operation;
Two-dimensional base drawing creation means for creating a two-dimensional base drawing of the wire harness by adding a part symbol and necessary text information to the modified two-dimensional model based on circuit information and attribute information of the three-dimensional CAD data When,
Production drawing creation conversion data generation means for creating conversion data for creating a wiring harness manufacturing drawing based on the created two-dimensional base drawing and attribute information of the three-dimensional CAD data. Wire harness manufacturing CAD system. 2. The specification difference list generating means for generating a specification difference list of circuits and parts in comparison with the previously acquired three-dimensional CAD data at the time of taking in the three-dimensional CAD data. Wire harness manufacturing CAD system. Three-dimensional shape information indicating the wiring harness wiring state, circuit information indicating the connection state of various electrical components via the wire harness, and noteworthy information on manufacturing such as how to attach components to the wire harness and how to treat the exterior A three-dimensional CAD data fetching step for fetching three-dimensional CAD data including the attribute information,
A three-dimensional model reproduction step for reproducing a three-dimensional model of the wire harness based on the three-dimensional shape information of the captured three-dimensional CAD data;
A three-dimensional-two-dimensional model development step of developing the reproduced three-dimensional model of the wire harness into a two-dimensional model;
A two-dimensional model correction step of correcting the two-dimensional model of the deployed wire harness according to an operator's correction operation;
A two-dimensional base drawing creation step of creating a two-dimensional base drawing of the wire harness by adding a part symbol and necessary text information to the modified two-dimensional model based on circuit information and attribute information of the three-dimensional CAD data When,
Causing a computer to execute a manufacturing drawing creation conversion data generation step for creating conversion data for manufacturing a wire harness manufacturing drawing based on the created two-dimensional base drawing and the attribute information of the three-dimensional CAD data. Features a wire harness manufacturing CAD program. The computer further includes a specification difference list generation step of generating a specification difference list of circuits and parts in comparison with the previously acquired three-dimensional CAD data when the three-dimensional CAD data is acquired. 3. The wire harness manufacturing CAD program according to 3.

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