JP5651267B1 - 3D CAD data generator - Google Patents

Abstract

Provided is a three-dimensional CAD data generation device capable of easily confirming a changed part of a parts table and reflecting the changed part in three-dimensional CAD data when a product design is changed. A three-dimensional CAD data generation device 100 compares a parts table before a product design change with a parts table after a product design change when an instruction to create CAD data after the product design change is given. The part configuration comparison processing unit 73 that outputs a comparison result between the design-changed part and the content of the change, and the three-dimensional CAD data of the part whose design has been changed based on the comparison result in the three-dimensional CAD data before the design change of the product The three-dimensional CAD data reflection processing unit 74 that generates the three-dimensional CAD data after the design change of the product and the three-dimensional CAD data after the design change of the reflected product are manufactured and structurally consistent. And a three-dimensional CAD data consistency confirmation processing unit 75 for outputting the confirmation result to the display unit. [Selection] Figure 1

Description

  The present invention relates to a three-dimensional CAD data generation device that facilitates confirmation of a changed part of a parts table when a product design is changed, and can reflect the changed part in three-dimensional CAD data.

  In product design using 3D CAD (Computer Aided Design) for products consisting of multiple parts, if there is a change in the product configuration, work to change the BOM (Bill Of Material), which is the bill of materials that composes the product, occurs. To do. At that time, if the number of parts is large, and the hierarchy of parts is complicated, it is difficult to confirm the change.

  For this reason, a three-dimensional CAD data difference parts table generation device has been disclosed in which a part addition / deletion / replacement process is performed on a three-dimensional CAD, and a change portion associated therewith can be easily viewed on a BOM (for example, a patent) Reference 1).

  In Patent Document 1, a comparison target three-dimensional CAD data instruction unit for indicating and selecting the three-dimensional CAD data of the product before and after the change, and the three-dimensional CAD data of the product before and after the selected and selected product before the change. 3D CAD data part configuration information extraction unit for extracting the part configuration of the product after the change and generating the part configuration information of the 3D CAD data of the product before and after the change, and the product before and after the change Three-dimensional CAD data component configuration comparison processing that compares the component configurations of the product before and after the change using the component configuration information of the three-dimensional CAD data and generates three-dimensional CAD data component configuration comparison information as a result of the comparison And a difference parts table generation processing unit that generates a 3D CAD data difference parts table from the 3D CAD data part configuration comparison information.

JP 2010-20362 A

  In the method described in Patent Document 1, the designer changes the three-dimensional CAD data of the product after the change, and whenever the part is added, the three-dimensional CAD data is corrected by the designer. The fact is.

  On the other hand, when it is necessary to make a change to the bill of materials first due to a customer request or the like, it takes a lot of time to reflect the change made to the bill of materials in the three-dimensional CAD data. For this reason, it has been demanded that the parts table constituting the product and the three-dimensional CAD data are linked to improve the design efficiency and the design quality when the design is changed.

  The present invention is an invention for solving the above-mentioned problems, and at the time of changing the design of a product, it is possible to easily check the changed part of the parts table and to reflect the changed part in the three-dimensional CAD data. It is an object to provide a three-dimensional CAD data generation device.

In order to achieve the above object, a three-dimensional CAD data generation apparatus according to the present invention includes three-dimensional CAD data of a product, three-dimensional CAD data of parts constituting the product, a bill of materials before product design change, and product design. A database (for example, a storage device 6 for storing three-dimensional CAD data) that stores the changed bill of materials, and when the creation of CAD data after a product design change is instructed, Compare the parts table after the design change of the product, output the comparison result of the changed part and the contents of the change, and the comparison result into the 3D CAD data before the design change of the product A 3D CAD data reflection processing unit that generates 3D CAD data after the design change of the product, reflecting the 3D CAD data of the part that has been changed based on the design change, and after the design change of the reflected product For the dimensional CAD data, check the manufacturing and structural consistency (for example, whether the parts are interfering with each other or whether the parts are weldable), and the confirmation result is displayed on the display unit. possess the 3-D CAD data consistency confirmation processing unit for outputting three-dimensional CAD data is created based on the design criteria skeleton data as a template for the product, reference skeleton data design, reference origin products A reference plane including the reference origin of the product, a reference origin for each part constituting the product, a reference plane including the reference origin for each part, and a reference for rotation including the reference origin for each part It is composed of an axis and a reference line that represents the outline shape of the product as a line, and the reference origin for each part is defined to have a relationship with the reference origin of the product .

  According to the present invention, when a product design is changed, it is possible to easily check the changed part of the parts table and reflect the changed part in the three-dimensional CAD data.

It is a figure which shows the structure of the three-dimensional CAD data generation apparatus which concerns on embodiment. It is a figure which shows the production | generation method of the three-dimensional CAD data which concerns on embodiment, (a) is a reference | standard figure of the reference | standard skeleton data of the whole product, (b) is a perspective view of the reference | standard skeleton data of the whole product. It is a figure which shows the relationship between the reference | standard skeleton data of the whole product, and the reference | standard skeleton data of parts, (a) is a figure which shows product reference | standard skeleton data, (b) is a figure which shows parts reference | standard skeleton data. It is a flowchart which shows the process of a three-dimensional CAD data generation apparatus. It is a flowchart which shows the process of a comparison object parts table instruction | indication part. It is a flowchart which shows the process of a components structure extraction part. It is a flowchart which shows the process of a components structure comparison process part. It is a flowchart which shows a replacement design change detailed comparison process. It is a flowchart which shows a design change component comparison process. It is a flowchart which shows an additional number name comparison process. It is a flowchart which shows the additional comparison process containing a lower hierarchy. It is a flowchart which shows a deletion comparison process. It is a flowchart which shows the process of a three-dimensional CAD data reflection process part. It is a flowchart which shows the process of a three-dimensional CAD data consistency confirmation process part. It is a figure which shows parts table | part components structure comparison information. It is a figure which shows 3D CAD data consistency information. It is a figure which shows an example of a three-dimensional CAD data reflection process, (a) is an external view before design change, (b) is an external view after design change. It is a figure which shows an example of a welding availability determination process, (a) is an example of a welding availability determination information setting file, (b) is a figure explaining joining between components. It is a figure which shows the example of a confirmation screen of the consistency of 3D CAD data. It is a figure of the processing outline of the three-dimensional CAD data generation apparatus which concerns on embodiment, (a) is a figure which shows the processing outline of a comparative example, (b) is a figure which shows the processing outline of this application.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a three-dimensional CAD data generation apparatus according to the embodiment. The three-dimensional CAD data generation device 100 includes a display device 1 (display unit), an input device 2, a three-dimensional CAD system unit 4, and a processing table device 3 having a parts table management unit 7, a work data memory 5, and three-dimensional CAD data. A storage device 6 (database) is provided.

  The parts table management unit 7 instructs to select the parts table of the existing product that is the product before the design change and the parts table of the new product that is the product after the design change according to the instruction of the input device 2. A part 71 (see FIG. 5), a part configuration information extracting unit 72 (see FIG. 6) that extracts part configuration information based on the parts list of the existing product and part configuration information based on the parts list of the new product, A component configuration comparison processing unit 73 (see FIG. 7) that compares the component configuration information of the existing product and the extracted component configuration information of the new product and outputs the comparison result to the work data memory 5 and the display device 1; The comparison result is reflected in the three-dimensional CAD data of the existing product, and the three-dimensional CAD data reflection processing unit 74 (see FIG. 13) for generating the three-dimensional data of the new product, and the production of the generated three-dimensional data of the new product and Structural integrity And certification, and a three-dimensional CAD data integrity checking processor 75 (see FIG. 14) for outputting a result of the confirmation in the working data memory 5 and the display device 1.

  The storage device 6 for storing 3D CAD data is composed of 3D CAD data of an already designed product created based on “design reference skeleton data” described later in FIG. 3D CAD data of parts to be processed, 3D CAD data of various parts used in the product, a parts table before changing the design of the product, and a parts table after changing the design of the product input from the input device 2 are stored. ing. The work data memory 5 is a work data memory used as a storage area in the processing of the three-dimensional CAD data generation device 100.

  The three-dimensional CAD system unit 4 and the parts table management unit 7 are programs executed by a computer called the three-dimensional CAD data generation device 100. The arithmetic processing unit 3 is implemented as a CPU (Central Processing Unit), for example, which executes a program as a hardware resource control unit of the computer. The work data memory 5 is realized as, for example, a RAM (Random Access Memory) as a storage unit for computer hardware resources. The three-dimensional CAD data storage device 6 is realized as, for example, an HDD (Hard Disk Drive) as a computer hardware resource storage unit.

  FIG. 20 is a diagram illustrating a processing overview of the three-dimensional CAD data generation device according to the embodiment. FIG. 20A is a diagram illustrating a processing overview of a comparative example. FIG. 20B is a diagram illustrating a processing overview of the present application. . In the case of the comparative example shown in FIG. 20A, when the design change is made by changing the component configuration of the designed product by diverting the component configuration of the designed product, specifically, the designer must The three-dimensional CAD data 61C is manually changed to generate the three-dimensional CAD data 62C after the design change. Then, an existing parts table 61B before the design change is generated from the three-dimensional CAD data 61C before the design change, and a new parts table 62B after the design change is generated from the three-dimensional CAD data 62C after the design change. Differences between the tables are output as change contents 63.

  On the other hand, in the case of the present application shown in FIG. 20B, when the existing parts table 61B before the design change and the new parts table 62B after the design change are designated, the change contents 63 are extracted, and the design change is performed. The previous three-dimensional CAD data 61C and the three-dimensional CAD data 62C after the design change are generated according to the change contents, the consistency of the generated three-dimensional CAD data 62C is confirmed, and output as the consistency confirmation result 64 It is a feature. In order to automatically generate the three-dimensional CAD data 62C after the design change from the three-dimensional CAD data 61C before the design change, there is “design reference skeleton data” as a template shown in FIG.

  2A and 2B are diagrams illustrating a method for generating three-dimensional CAD data according to the embodiment, in which FIG. 2A is a reference diagram of reference skeleton data of the entire product, and FIG. 2B is a perspective view of reference skeleton data of the entire product. It is. FIG. 3 is a diagram showing the relationship between the reference skeleton data of the entire product and the reference skeleton data of the part, (a) is a diagram showing a part of the product reference skeleton data, and (b) is the part reference skeleton data. FIG. As a feature of the present embodiment, assembly data representing the entire product of the three-dimensional CAD data is created based on “design reference skeleton data” as a template.

The “design reference skeleton data” is composed of the following.
(1) Reference plane: Plane and reference position for product and parts (2) Reference origin: Reference position and reference position for product and parts (3) Reference axis: Wheel and arm Arrangement and rotation reference of rotating parts such as rotating shafts and cylindrical parts (4) Reference line: A line representing the general shape of the product

  These standards (1) to (4) represent the standard position of the entire product, the general shape, and the assembly position of each component. And each component is assembled | attached with respect to the reference | standard of (1) to (4). The assembly standard of each part is given to all parts that are assumed to be assembled when assuming a part incorporated in the standard model of the product and a variation model derived from the standard model. As a result, even if there is a part that does not exist in the three-dimensional CAD data 61C before the design change and is newly added to the three-dimensional data 62C after the design change, the assembly position is defined in advance. Become.

  In addition, a standard for assembling the assembly data is prepared for each part, and the existing data having the standard is also used when creating a new part. The reference position for assembling each part is assigned to “design reference skeleton data” and each part, and the names of both parts are the same.

  In the present embodiment, a description will be given using a hydraulic excavator 40 as an example. The hydraulic excavator 40 is a self-propelled construction machine that is used for various purposes by changing various attachments to the tips of a plurality of joint arms that are operated by hydraulic pressure. 2 (a) and 2 (b) show design reference skeleton data of the entire backhoe (backhoe) product of the excavator 40 in which the bucket is attached to the operator side. The operator is suitable for excavation in a place lower than the ground surface by operating in a direction of pulling (holding) himself / herself with a bucket facing the operator.

  The product coordinate system 1 has a product reference origin 10. The coordinate system 1 is managed as XYZ three-dimensional coordinates, and the YZ plane shown in FIG. 2A is the reference plane of the entire product of the hydraulic excavator 40. The design reference skeleton data of the entire product includes arm reference lines 31 and 32 indicating the general shape of the product, bucket reference line 33, caterpillar front axis 11, caterpillar rear axis 12, arm axis 1 (21), arm axis 2 (22) The arm shaft 3 (23) is included.

  In the present embodiment, when there is a light 55 as the illumination component shown in FIG. 3B, the reference skeleton data of the component is also used. FIG. 3A is an enlarged view of the attachment portion of the light 55 (part) in the reference skeleton data of the entire product. The relationship between the reference origin 52 of the light 55 (part) and the reference origin 10 of the product is defined. FIG. 3B shows reference skeleton data of the light 55, which is composed of a reference plane 50 for the part, a reference axis 51 for the part, and a reference origin 52 for the part. In the three-dimensional CAD data generation apparatus 100 according to the present embodiment, the parts can be arranged at predefined positions by performing processing for matching the same name standards.

  The three-dimensional CAD data of this embodiment is created based on design reference skeleton data that is a model of a product. The design reference skeleton data includes a reference origin of a product, a reference plane including the reference origin of the product, The reference origin for each part constituting the product, the reference plane including the reference origin for each part, the reference axis serving as the reference for rotation including the reference origin for each part, and the approximate shape of the product are represented by lines. The reference origin for each part defines the relationship with the reference origin of the product.

  In the three-dimensional CAD data reflection processing unit 74 (see FIG. 1), the three-dimensional CAD created based on the reference skeleton data of the entire product and the reference skeleton data of the parts recorded in the storage device 6 for storing the three-dimensional CAD data. Using the data, processing such as adding, deleting, and changing the number of parts can be performed.

  FIG. 4 is a flowchart showing processing of the three-dimensional CAD data generation apparatus. First, based on the instruction of the comparison target data instruction 2a, the comparison target parts list instructing unit 71 takes in the parts list of the existing product (parts list before the design change) and the new product or the parts list after the design change, The comparison target parts table 5 a is output to the work data memory 5.

  Here, the comparison target data instruction 2 a has a function of selecting product bill of material data, and is input from the input device 2. The comparison target data instruction 2a may be a case in which creation of CAD data after a design change of a product is instructed after creation of a parts list of a new product or a product after a design change. Further, the parts table of the existing product, the new product, or the part list after the design change is stored in the storage device 6 for storing the three-dimensional CAD data.

  Next, the parts configuration information extraction unit 72 takes in the parts table of the existing product, which is the comparison target parts table 5a, and the new product or the parts table after the design change, and processes the parts table and the parts configuration information 5b. Output to the memory 5. Here, the parts table part configuration information 5b is information systematically gathered about details of parts constituting the product. The details of the parts include, for example, the name and number of parts, a parent-child relationship with other parts, and the like. The parts table also has such detailed data (data specifying the name of the part, data specifying the number, data indicating the parent-child relationship (level), etc.). The parts configuration information extraction unit 72 extracts the detailed data from the parts table and converts it into a format necessary for creating the parts table part configuration information 5b.

  Next, the parts configuration comparison processing unit 73 takes in the parts table part configuration information 5b, compares the existing product parts table with the new product or the part list after the design change, and the parts table part configuration comparison information as the comparison result. 5c (see FIG. 15) is output to the work data memory 5.

  FIG. 15 is a diagram showing parts table part configuration comparison information. The parts table part configuration comparison information 5c includes an existing parts table 61B, a new parts table 62B, and a change content 63 that compares the existing parts table 61B with the new parts table 62B. The existing parts table 61B and the new parts table 62B are composed of a level, a part name, a number used, a material of a part, and a joining method for attaching a part, with each part as a record and a value indicating a parent-child relationship between the parts. ing. For the level, the component in which the value “0” is registered is the highest component. Parts for which the value “* 1” is registered are child parts. Although not shown in the drawing, a part where the value “** 2” is registered is a child part of “* 1”. The part name may be a part identification symbol.

  Here, the highest-order component refers to a component that does not have a parent component in the parent-child relationship among the components that constitute the product. A child part is a part attached to a parent part when a part constituting the product is a parent part.

  Specifically explaining the parts table parts configuration comparison information 5c, the top part of the existing parts table 61B is “excavator”, and “CAB”, “chassis”, “BOOT”, “ARM”, “Backet”, “caterpillar”, “crawler”, “Cyl_Lod”, “Cyl_Hed”,...

  The top part of the new parts table 62B is “excavator 2”, and “CAB”, “chassis”, “BOOM”, “ARM”, “Backset 2”, “caterpillar”, “Crawler”, “Plate”, “Light”, “Cyl_Lod”, “Cyl_Hed”,...

  The change contents 63 include, as a comparison result between the existing parts table 61B and the new parts table 62B, the change of the “name” of the part in the record 151, the “deletion” of the part in the record 152, the “addition” of the part in the record 153, It can be seen that “addition” of the component is performed in the record 154 and “addition” of the component is performed in the record 155.

  Returning to FIG. 4, next, the 3D CAD data reflection processing unit 74 takes in the existing 3D CAD data 6 a of the existing product from the 3D CAD data storage device 6, and also stores the parts table part configuration comparison information 5 c. Based on the comparison result, the 3D CAD data of the part whose design has been changed is reflected in the existing 3D CAD data 6a to generate the new product or the new 3D CAD data 6b after the design change, and the 3D CAD The data is output to the data storage device 6 and stored in the work data memory 5 as new three-dimensional CAD data 5d.

  Finally, in the three-dimensional CAD data consistency confirmation processing unit 75, the new three-dimensional CAD data 6b is fetched from the three-dimensional CAD data storage device 6, and the consistency in manufacturing and structure is confirmed. It is displayed on the display device 1 as three-dimensional CAD data consistency information 1a (see FIG. 16).

  FIG. 16 is a diagram showing three-dimensional CAD data consistency information. The three-dimensional CAD data consistency information 1a includes an existing parts table 61B, a change content 63, a new parts table 62B, and a consistency check result 64. The existing parts table 61B, the changed contents 63, and the new parts table 62B are the same as those shown in FIG. The consistency check result 64 has a configuration check column and a detailed check result. It is recommended that the record of failure in the consistency check is highlighted with a color by a red frame or the like.

  The consistency confirmation result 64 will be specifically described. From the records 161 and 164, it can be seen that “BOOM” and “Plate” are “dissimilar material welding” as a combination of materials not suitable for welding. From the record 163, it can be seen that there is an “interference” between parts. In the case of “interference”, the volume of the interference part is also output.

  Next, the processing of the three-dimensional CAD data generation device 100 according to the present embodiment will be described in detail. FIG. 5 is a flowchart showing the processing of the comparison target parts table instruction unit. FIG. 6 is a flowchart showing processing of the component configuration extraction unit. FIG. 7 is a flowchart showing processing of the component configuration comparison processing unit. FIG. 8 is a flowchart showing the replacement design change detail comparison process. FIG. 9 is a flowchart showing the design change component comparison process. FIG. 10 is a flowchart showing the additional number name comparison process. FIG. 11 is a flowchart showing additional comparison processing including a lower hierarchy. FIG. 12 is a flowchart showing the deletion comparison process. FIG. 13 is a flowchart showing the processing of the three-dimensional CAD data reflection processing unit. FIG. 14 is a flowchart showing the processing of the three-dimensional CAD data consistency check processing unit. This will be described with reference to FIGS. 1 and 4 as appropriate.

<< Processing of Comparison Target Parts List Instructing Unit 71 >>
In FIG. 5, for example, when the existing parts table 61B shown in FIG. 15 is selected via the input device 2 (S11), the comparison target parts table instruction unit 71 reads the existing parts table 61B (S12). Next, for example, when the new parts table 62B shown in FIG. 15 is selected via the input device 2 (S13), the comparison target parts table instruction unit 71 reads the new parts table 62B (S14). Then, the comparison target parts table 5a is output to the work data memory 5 (S15), and the processing of the comparison target parts table instruction unit 71 is completed. After the process of FIG. 5 is completed, the process proceeds to the process step of the component configuration information extraction unit 72 shown in FIG.

<< Processing of Component Configuration Information Extraction Unit 72 >>
In FIG. 6, the component configuration information extraction unit 72 takes in the comparison target component table 5a stored in the comparison target component table instruction unit 71 (S21). Next, the component configuration information extraction unit 72 takes in the existing component table 61B from the comparison target component table 5a acquired above (S22), acquires the highest component (S23), and configures the child component constituting the highest component. Child component information is acquired by the component information acquisition process (S24).

  Next, the component configuration information extraction unit 72 takes in the new component table 62B from the comparison target component table 5a captured above (S25), acquires the highest component (S26), and configures the child component constituting the highest component. Child component information is acquired by the component information acquisition process (S27). Then, the parts configuration information extraction unit 72 outputs the parts list as part configuration information 5b (S28).

  In the child component information acquisition process (S24, S27) shown in FIG. 6, the component configuration information extraction unit 72 acquires target component information (target component information) (S31), and then lowers the target component by one layer. Is acquired (S32), and the child component number loop processing (S33 to S36) is performed on the acquired child components.

  In the child component count loop process, the component configuration information extraction unit 72 acquires number information indicating the number of child components (S34), and then acquires child component information by a child component information acquisition process that is a recursive process. (S35). As a result, the number information of the number of all parts is acquired. Above, the process of the components structure information extraction part 72 is complete | finished. After the processing in FIG. 6 is completed, the process proceeds to the processing step of the component configuration comparison processing unit 73 in FIG.

<< Processing of Component Configuration Comparison Processing Unit 73 >>
In FIG. 7, the parts configuration comparison processing unit 73 takes in the parts table part configuration information 5b output from the parts configuration information extraction unit 72 (S41), and then, from the parts table part configuration information 5b, The upper part is fetched (S42), and the uppermost part of the new parts table 62B is fetched (S43). Then, the component configuration comparison processing unit 73 compares the difference between the two top-level components taken in, and outputs the top-level component comparison information as the parts table component configuration comparison information 5c (S44). A child component comparison process to be compared is executed (S45). The parts configuration comparison processing unit 73 may store the parts table part configuration comparison information 5 c in the work data memory 5 and display it on the display device 1.

  In the child component comparison processing (S45, S77) shown in FIG. 7, the component configuration comparison processing unit 73 acquires a component that is one layer lower (S51), and performs detailed comparison of replacement and design change for the acquired component. A replacement design change detailed comparison process is executed (S52), and an additional number name deletion comparison process is performed to extract the part addition, the part number change, the part name change, and the part deletion (S53).

  In the replacement design change detailed comparison process (S52) shown in FIG. 8, the child part number loop process for the new product or the product after the design change (new), that is, the new child part number loop process (S61 to S66) is performed.

  In the new child component number loop process, the component configuration comparison processing unit 73 determines whether or not the child component is a replacement component (S62), and if the child component is a replacement component (S62, Yes), A replacement component comparison process (S63) for comparing the replaced components is executed. If the child part is not a replacement part (S62, No), the process proceeds to S64. Next, the component configuration comparison processing unit 73 determines whether or not the child component is a design change component (S64). If the child part is a design change part (S64, Yes), the part configuration comparison processing unit 73 executes a design change part comparison process for comparing the parts before the design change and the parts after the design change (S65). If the child part is not a design change part (S64, No), the part configuration comparison processing unit 73 repeats the new child part number loop process for other new child parts.

  In the replacement part comparison process (S63), the part configuration comparison processing unit 73 acquires the part before replacement (part before replacement) (S71), and also acquires the number of parts before replacement (number of parts before replacement) (S72). ). Next, the part configuration comparison processing unit 73 determines whether or not the number of parts before replacement is 1 or more (S73). If the number of parts before replacement is 1 or more (S73, Yes), Information comparing the replaced parts (replacement part comparison information) is output as parts table part configuration comparison information 5c (S74), and the process proceeds to S75. When the number of parts before replacement is not 1 or more (S73, No), the process proceeds to S75.

  Next, the part configuration comparison processing unit 73 determines whether or not there is a change in the number of parts between the part before replacement and the part after replacement (S75). When there is a change in the number of parts (Yes in S75), the part configuration comparison processing unit 73 compares information (part number comparison information) that compares the number of parts of the part before replacement with the part after replacement (part number comparison information). 5c is output (S76), and the process proceeds to S77. When there is no change in the number of parts (S75, No), the process proceeds to S77. Thereafter, the child component comparison process (see S51 to S53) shown in FIG. 7 is executed again (S77). This is the end of the description of the replacement design change detailed comparison process.

  In the design change part comparison processing (S65, S125) shown in FIG. 9, the part configuration comparison processing unit 73 acquires a part before design change (part before design change) (S81), and before and after the design change. Information comparing the parts (design change comparison information) is output as parts table part configuration comparison information 5c (S82). Next, the part configuration comparison processing unit 73 acquires a part (existing new one layer lower part) that is one level lower than the part before design change (existing) and the part after design change (new) (S83). The replacement design change detailed comparison process shown in FIG. 8 is executed (S84). Next, the component configuration comparison processing unit 73 performs an additional number name deletion comparison process for comparing the addition, number, name, and deletion information (S85).

  Next, the component configuration comparison processing unit 73 determines whether the names before and after the design change have been changed (S86). If the name has been changed (S86, Yes), the parts configuration comparison processing unit 73 outputs information comparing the names (name comparison information) as the parts table part configuration comparison information 5c (S87), and proceeds to S88. If the name has not been changed (S86, No), the process proceeds to S88. The component configuration comparison processing unit 73 determines whether the material before the design change and after the design change has been changed (S88). When the material has been changed (S88, Yes), the component configuration comparison processing unit 73 outputs information comparing the materials (material comparison information) as the parts table component configuration comparison information 5c (S89), and ends the processing. . If the material has not been changed (S88, No), the process is terminated.

  In the additional number name deletion comparison process (S53, S85), the component configuration comparison processing unit 73 executes an additional number name comparison process (see FIG. 10) for comparing information indicating the addition and number of parts and the name (S91). Then, a deletion comparison process (see FIG. 12) for comparing information (deletion information) indicating component deletion is executed (S92).

  In the additional number name comparison process (S91) shown in FIG. 10, the component configuration comparison processing unit 73 performs the child part number loop process for the new product or the product after the design change (new), that is, the new child part number loop process (S101). To S113).

  In the new child component number loop process, the component configuration comparison processing unit 73 turns off the coincidence flag indicating whether or not various comparison information described later has been output (S102), and the child component number loop process for the existing product (existing). That is, the number of child parts loop processing (S103 to S110) is performed.

  In the existing child component number loop process, the component configuration comparison processing unit 73 determines whether the child component of the existing product is the same as the new product or the child component after the design change (that is, the existing component) (S104). . If the existing parts are the same (S104, Yes), the part configuration comparison processing unit 73 proceeds to S105. If the existing parts are not the same (No in S104), the existing parts count loop process is repeated for the other existing parts.

  In step S105, the part configuration comparison processing unit 73 determines whether there is a change in the number of child parts of the existing product and the new product or the part after the design change. When the number has changed (S105, Yes), the information (number comparison information) for comparing the numbers is output as the parts table component configuration comparison information 5c (S106), and the process proceeds to S107. When there is no change in the number (S105, No), the process proceeds to S107.

  In step S107, the part configuration comparison processing unit 73 determines whether there is a change in the names of the child parts of the existing product and the new product or the part after the design change. When there is a change in the name (S107, Yes), the information (name comparison information) obtained by comparing the names is output as the parts table component configuration comparison information 5c (S108), and the process proceeds to S109. If there is no change in the name (S107, No), the process proceeds directly to S109.

  Thereafter, the component configuration comparison processing unit 73 turns on a match flag indicating whether or not comparison information has been output (S109), and exits the existing component count loop. After exiting this loop, the component configuration comparison processing unit 73 determines whether the match flag is ON or OFF (S111). If the component configuration comparison processing unit 73 is ON (S111, Yes), the component configuration comparison processing unit 73 is regarded as an additional component. Therefore, the component configuration comparison processing unit 73 performs an additional comparison process for comparing the added content (S112), and proceeds to S113. When it is OFF (S111, No), it progresses to S113 and repeats a new child part number loop process about another new child part.

  In the additional comparison process (S112) shown in FIG. 11, the component configuration comparison processing unit 73 first outputs information (additional comparison information) comparing the added contents as the parts table component configuration comparison information 5c (S121). The component configuration comparison processing unit 73 determines whether or not the added component is a new component (S122). If the added component is a new component (S122, Yes), the lower layer addition comparison process compares information indicating addition of a lower layer. Is executed (S123), and the process proceeds to S124. When it is not a new part (S122, No), it progresses to S124.

  Next, the component configuration comparison processing unit 73 determines whether or not the additional component is a design change component (S124), and if it is a design change component (S124, Yes), the design change component comparison process of FIG. 9 is performed. Execute (S125) and end the process. If it is not a design change part (S124, No), the process is terminated.

  In the lower layer addition comparison process (S123), the component configuration comparison processing unit 73 first acquires a new child component that is one layer lower (new one layer lower child component) (S131), and then acquires the product ( A new component count loop process (new), that is, a new component count loop process (S132 to S134) is executed. In the new part count loop process, an additional comparison process is executed (S133).

  In the deletion comparison process (S92) shown in FIG. 12, the component configuration comparison processing unit 73 first performs a child component number loop process for an existing product (existing), that is, an existing child component number loop process (S141 to S149). .

  In the existing part count loop process, the part configuration comparison processing unit 73 turns off the coincidence flag indicating whether or not various comparison information has been output (S142), and the child for the new product or the product after the design change (new). The part number loop process, that is, the new child part number loop process (S143 to S146) is performed.

  In the new child part number loop process, the part structure comparison processing unit 73 determines whether the child part of the existing product is the same as the new product or the child part after the design change (that is, the existing part) (S144). If the existing parts are the same (S144, Yes), the coincidence flag is turned ON (S145), and the process proceeds to S146. Thereafter, the new child part number loop process is repeated for other new child parts. On the other hand, when the existing parts are not the same (S144, No), the process proceeds to S146, and the new child part number loop process is repeated for the other new child parts.

  After exiting the new part count loop processing, the component configuration comparison processing unit 73 next determines whether or not the match flag is OFF (S147). If the match flag is OFF (S147, Yes), the deletion is deleted. A deletion detail comparison process is performed to compare the information shown (S148). Thereafter, the number of child parts loop process is repeated for the other child parts. On the other hand, when the coincidence flag is not OFF (S147, No), the child part number loop process is repeated for other child parts as it is.

  In the deletion detail comparison process (S148), the component configuration comparison processing unit 73 first outputs information (deletion comparison information) comparing the deletion contents as the parts table component configuration comparison information 5c (S151), and the component is deleted. Then, a new one-level lower child component (new one-level lower child component) is acquired (S152). Next, the component configuration comparison processing unit 73 performs a child component number loop process for the acquired component (new), that is, a new child component number loop process (S153 to S155). In the new part count loop process, a deletion detail comparison process is executed as a recursion process (S154). Above, the process of the components structure comparison process part 73 is complete | finished. After the processing of FIG. 6 is completed, the process proceeds to the processing step of the three-dimensional CAD data reflection processing unit 74 shown in FIG.

<< Processing of the three-dimensional CAD data reflection processing unit 74 >>
In FIG. 13, first, the three-dimensional CAD data reflection processing unit 74 takes in the parts table / parts configuration comparison information 5c (see FIG. 15) output from the part configuration comparison processing unit 73 (S161), and already has the three-dimensional CAD data. 6a is read (S162).

  The three-dimensional CAD data reflection processing unit 74 determines whether the design is a diversion design or a design change (S163). In the case of the diversion design (S163, diversion design), the CAD data of the uppermost part is copied (S164), and the process goes to S165. move on. In the case of design change (S163, design change), the process proceeds to S165.

  The three-dimensional CAD data reflection processing unit 74 determines whether or not a part is added based on the parts table part configuration comparison information 5c (S165). If a part is added (S165, Yes), the part is added. The process is executed (S166), and the process proceeds to S167. If no part is added (S165, No), the process proceeds to S167.

  In S166, each part of the existing three-dimensional CAD data is registered in the three-dimensional CAD data storage device 6 as template data. In addition, as already described with reference to FIGS. 2 and 3, each part is defined based on the reference skeleton data of the entire product and the reference skeleton data of the part. Has been. For this reason, it is possible to place components at predefined positions.

  The three-dimensional CAD data reflection processing unit 74 determines whether there is a part deletion based on the parts table part configuration comparison information 5c (S167). If there is a part deletion (S167, Yes), the part deletion is performed. The process is executed (S168), and the process proceeds to S169. If there is no deletion of parts (S167, No), it progresses to S169. In S168, a reference origin and a reference plane, which serve as a reference for the arrangement position when a part is deleted, are defined. For this reason, it is possible to delete a component at a predefined position.

  The three-dimensional CAD data reflection processing unit 74 determines whether or not there is a change in the number of parts based on the parts table component configuration comparison information 5c (S169), and if there is a change in the number of parts (S169, Yes), A part number changing process is executed (S170), and the process proceeds to S171. If there is no change in the number of parts (S169, No), the process proceeds to S171.

  The three-dimensional CAD data reflection processing unit 74 determines whether there is a part name change based on the parts table part configuration comparison information 5c (S171), and if there is a part name change (S171, Yes), A part name change process is executed (S172), and the process proceeds to S173. If there is no change in the name of the part (S171, No), the process proceeds to S173.

  The three-dimensional CAD data reflection processing unit 74 determines whether or not there is a change in the material of the part based on the parts table component configuration comparison information 5c (S173), and if there is a change in the material of the part (Yes in S173), The part material change process is executed (S174), and the process proceeds to S175. If there is no change in the material of the part (S173, No), the process proceeds to S175.

  In S175, the three-dimensional CAD data reflection processing unit 74 generates new three-dimensional CAD data 6b and registers it in the three-dimensional CAD data storage device 6. Above, the process of the three-dimensional CAD data reflection process part 74 is complete | finished. After the processing in FIG. 13 is completed, the process proceeds to the processing step of the three-dimensional CAD data consistency confirmation processing unit 75 shown in FIG.

  FIG. 17 is a diagram illustrating an example of the three-dimensional CAD data reflection process, where (a) is an external view before the design change, and (b) is an external view after the design change. In the excavator after the design change in FIG. 17B, the bucket 171 is deleted and a new bucket 172 is added to the excavator before the design change in FIG. Further, a light 173 (see FIG. 3B) is added to the excavator after the design change in FIG.

  The three-dimensional CAD data reflection process will be described with reference to FIG. 15. Deletion of the bucket 171 corresponds to “deletion” shown in the record 152. The addition of the bucket 172 corresponds to “addition” indicated in the record 153. The addition of the light 173 (see FIG. 3B) corresponds to “addition” shown in the records 154 and 155. It can be seen that a plate is used for the base of the light 173.

<< Processing of 3D CAD Data Consistency Confirmation Processing Unit 75 >>
In FIG. 14, first, the three-dimensional CAD data consistency confirmation processing unit 75 takes in the new three-dimensional CAD data 6b generated by the three-dimensional CAD data reflection processing unit 74 (S181), and stores it in the new three-dimensional CAD data 6b. Then, a consistency check is performed to determine whether or not a manufacturing or structural defect has occurred (S182), and the process proceeds to S183.

  In S183, the three-dimensional CAD data consistency confirmation processing unit 75 determines whether or not there is an interfering part (interfering part) between parts in the new three-dimensional CAD data 6b, and if there is an interfering part (S183, Yes). Then, the interference information is extracted (S184), and the process proceeds to S185. If there is no interference part (S183, No), it will progress to S185. If the parts interfere with each other in S184, the volume of the interference part is extracted.

  In S185, the three-dimensional CAD data consistency confirmation processing unit 75 determines whether or not the new three-dimensional CAD data 6b includes a dissimilar material welding. Then (S186), the process proceeds to S187. If there is no dissimilar material welding (S185, No), the process proceeds to S187. In S186, in the case of “welding” by the joining method of the parts table for the adjacent parts that are in contact with each other, the combination of the materials of the adjacent parts is extracted as a combination of welding.

18A and 18B are diagrams illustrating an example of a weldability determination process. FIG. 18A is an example of a weldability determination information setting file, and FIG. 18B is a diagram illustrating joining between components. In the weldability determination process, the following process is performed.
(1) A weldability determination condition of a combination of different materials is input in advance in the “weldability determination information setting file”.
(2) Extract parts that are in contact (distance is zero) from the three-dimensional CAD data.
(3) Extract the material of the extracted two parts from the parts table.
(4) The “weldability determination information setting file” is read, and it is determined whether or not a combination of materials is weldable for the two extracted parts.
(5) Append to the consistency confirmation result 64 of the three-dimensional CAD data consistency information 1a as the confirmation result of the three-dimensional CAD consistency.

  In S187, the three-dimensional CAD data consistency check processing unit 75 stores the determination results of S184 and S186 in the work data memory 5 and also stores the three-dimensional CAD data consistency information 1a in the display device 1 (see FIG. 16). ) Is displayed. FIG. 16 has already been described. From record 161 and record 164, it can be seen that “BOOM” and “Plate” are “dissimilar material welding” as a combination of materials that are not suitable for welding. From record 162 and record 163, FIG. It can be seen that there is an output of “interference” from the collision of the parts. In the case of “interference”, the volume of the interference part is also output.

  FIG. 19 is a diagram showing an example of a confirmation screen for consistency of three-dimensional CAD data. FIG. 19 is a screen displayed on the screen when the cell in the thick frame portion of the record 163 of the three-dimensional CAD data consistency information 1a shown in FIG. 16 is clicked. An interference portion is generated between the bucket mounting shaft and the arm mounting portion, and the portion is displayed in red.

  Returning to FIG. 14, the three-dimensional CAD data consistency confirmation processing unit 75 determines whether or not there is a defect in the consistency confirmation result 64 of the three-dimensional CAD data consistency information 1a (see FIG. 16) (S188). If there is no defect (S188, OK), the new three-dimensional CAD data is stored in the three-dimensional CAD data storage device 6 with the fact that the consistency has been confirmed (S189), and the process is terminated. On the other hand, if there is a description of a defect (S188, NG), a request for correction of the new three-dimensional CAD data 6b is displayed on the display device 1, and the process is terminated. Above, the process of the 3-dimensional CAD data consistency confirmation process part 75 is complete | finished.

≪Summary≫
According to the present embodiment, the following effects can be obtained.
(1) Since the 3D CAD data is created based on the reference skeleton data of the entire product and the reference skeleton data of the parts, it is possible to automate processes such as adding parts, deleting parts, and changing the number of parts for the product. Can be planned.
(2) Since the parts table before and after the design change can be compared, the three-dimensional CAD data after the design change can be automatically generated, and the consistency check of the three-dimensional CAD data after the design change can be performed, the design efficiency can be improved.
(3) Further, the design quality can be improved by checking the consistency of the three-dimensional CAD data after the design change.
(4) Design changes and consistency checks can be performed by persons other than the design staff and CAD staff.

≪Others≫
In addition, although the said form is the best thing for implementing this invention, the implementation form is not limited to this. Therefore, various modifications can be made to the implementation form without changing the gist of the present invention.

  For example, in the present embodiment, replacement, addition, deletion, design change, and number change are taken up as product change contents (see FIG. 13). However, the content of the change is not limited to these, and may be appropriately changed according to the change in the processing procedure taken up in the present embodiment. Specifically, the change content is such that the change content of replacement is eliminated, and the replacement is performed by a combination of deletion and addition.

  Further, in the present embodiment, color-coded display is performed in the three-dimensional CAD data consistency information 1a (see FIG. 16) so that the change contents can be easily viewed. However, in order to make the change contents easy to see, highlighting such as changing the size, font, and thickness of the character, changing the type of underline to be drawn on the character, and the like may be performed. In addition, specific configurations of hardware, software, flowcharts, and the like can be changed as appropriate without departing from the spirit of the present invention.

1 Display device (display unit)
DESCRIPTION OF SYMBOLS 1a 3D CAD data consistency information 2 Input device 3 Arithmetic processing device 4 3D CAD system part 5 Work data memory 5a Comparison object parts table 5b Parts table parts structure information 5c Parts table parts structure comparison information 5d, 6b New 3D CAD data 6 Storage device for 3D CAD data storage 6a Already 3D CAD data 7 Parts table management unit 10 Product reference origin 40 Hydraulic excavator (product)
11 Caterpillar front shaft 12 Caterpillar rear shaft 21 Arm shaft 1
22 Arm shaft 2
23 Arm shaft 3
31, 32, 33 Reference line 50 Component reference plane 51 Component reference axis 52 Component reference origin 55 Light (component)
71 Comparison Target Parts Table Instruction Unit 72 Part Configuration Information Extraction Unit 73 Part Configuration Comparison Processing Unit 74 3D CAD Data Reflection Processing Unit 75 3D CAD Data Consistency Check Processing Unit 100 3D CAD Data Generation Device

Claims (4)

A database for storing the three-dimensional CAD data of the product, the three-dimensional CAD data of the parts constituting the product, the parts table before the design change of the product, and the parts table after the design change of the product;
When the creation of CAD data after the design change of the product is instructed, the parts table before the design change of the product is compared with the parts table after the design change of the product, and the part whose design has been changed and the change A component configuration comparison processing unit that outputs a comparison result of contents;
Three-dimensional CAD data after the design change of the product is generated by reflecting the three-dimensional CAD data of the part whose design has been changed based on the comparison result in the three-dimensional CAD data before the design change of the product A CAD data reflection processing unit;
A three-dimensional CAD data consistency confirmation processing unit for confirming manufacturing and structural consistency of the reflected three-dimensional CAD data after the design change of the product and outputting the confirmation result to a display unit;
The three-dimensional CAD data is
It is created based on the design standard skeleton data that is the model of the product,
The design reference skeleton data is
A reference origin of the product, a reference plane including a reference origin of the product,
A reference origin for each part constituting the product, a reference plane including a reference origin for each part, a reference axis serving as a reference for rotation including a reference origin for each part,
It consists of a reference line that represents the outline shape of the product with a line,
The reference origin for each component, three-dimensional CAD data generating device characterized in that the relationship between the reference origin of the product are defined. When there is an addition of the part, the three-dimensional CAD data reflection processing unit arranges the additional part based on a reference plane of the part, a reference point of the part, and a reference axis of the part, The three-dimensional CAD data generation apparatus according to claim 1 , wherein the three-dimensional CAD data after the design change is generated. A database for storing the three-dimensional CAD data of the product, the three-dimensional CAD data of the parts constituting the product, the parts table before the design change of the product, and the parts table after the design change of the product;
When the creation of CAD data after the design change of the product is instructed, the parts table before the design change of the product is compared with the parts table after the design change of the product, and the part whose design has been changed and the change A component configuration comparison processing unit that outputs a comparison result of contents;
Three-dimensional CAD data after the design change of the product is generated by reflecting the three-dimensional CAD data of the part whose design has been changed based on the comparison result in the three-dimensional CAD data before the design change of the product A CAD data reflection processing unit;
A three-dimensional CAD data consistency confirmation processing unit for confirming manufacturing and structural consistency of the reflected three-dimensional CAD data after the design change of the product and outputting the confirmation result to a display unit;
The component configuration comparison processing unit, as the comparison result, whether there is an addition of the component, whether there is a deletion of the component, whether there is a change in the number of the components, whether there is a change, and three-dimensional CAD data generating device you characterized in that whether there is a change of the part of the material displayed on the display unit. A database for storing the three-dimensional CAD data of the product, the three-dimensional CAD data of the parts constituting the product, the parts table before the design change of the product, and the parts table after the design change of the product;
When the creation of CAD data after the design change of the product is instructed, the parts table before the design change of the product is compared with the parts table after the design change of the product, and the part whose design has been changed and the change A component configuration comparison processing unit that outputs a comparison result of contents;
Three-dimensional CAD data after the design change of the product is generated by reflecting the three-dimensional CAD data of the part whose design has been changed based on the comparison result in the three-dimensional CAD data before the design change of the product A CAD data reflection processing unit;
A three-dimensional CAD data consistency confirmation processing unit for confirming manufacturing and structural consistency of the reflected three-dimensional CAD data after the design change of the product and outputting the confirmation result to a display unit;
The three-dimensional CAD data consistency confirmation processing unit, as the confirmation result, interferes with the parts table before the design change, the parts table after the design change, the changed contents for each part, and the parts attached to the product. to whether, welding confirmation result and to contain three-dimensional CAD data generating device you characterized as to whether parts to each other is material that can be welded to.

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