KR102178243B1 - Method and device for optimizing hierarchy of 3d cad model - Google Patents

Abstract

In a method for reducing the hierarchy structure of a 3D CAD model performed by a device for reducing the hierarchy structure of a 3D CAD model, generating a bug report, a hierarchy structure of a 3D CAD model including a plurality of objects having each part number Displaying, receiving a user input for selecting at least one object from among the hierarchical structure of the 3D CAD model, displaying a 3D CAD model image of at least one selected object upon receiving the user input, and With reference to the bug report, a method and apparatus for reducing the hierarchy structure of a 3D CAD model comprising the step of generating a lightweight 3D CAD model file in which the hierarchy structure of the 3D CAD model is lightened is disclosed.

Description

Method and apparatus for lightening the hierarchical structure of 3D CAD models {METHOD AND DEVICE FOR OPTIMIZING HIERARCHY OF 3D CAD MODEL}

The present invention relates to a method and apparatus for lightening the hierarchical structure of a 3D CAD model, and more particularly, to a method and apparatus for lightening the hierarchical structure of a 3D CAD model. The present invention relates to a method and apparatus for lightening the hierarchical structure of a 3D CAD model, which not only achieves the effect of smoothly driving even in the PLM system, but also has no limited utility in the PLM system.

In various industrial fields such as offshore plants and automobiles, design work using 3D CAD programs is being actively carried out for the production of facilities or products in the field.

3D models created with 3D CAD programs (hereinafter referred to as '3D CAD models') include a large number of vertices, parts (objects in the 3D CAD model hierarchy), materials constituting each part, and attribute information. It consists of (property) etc.

Most of the 3D CAD models are made for the purpose of product production, so the precision indicated by the number of vertices or object hierarchy is very high compared to 3D CAD models generally produced in the entertainment industry such as movies and games.

Such high precision and excessive data due to attribute information (length, diameter, material, etc.) given for each object solves the problem that 3D CAD models are driven only on high-spec devices or limited functions are implemented on low-spec devices. Results.

In particular, in the case of offshore plant facilities, although all departments participating in the entire process from design, production technology, mass production, maintenance, etc., should operate the 3D CAD model smoothly, the high precision and excessive It is difficult to operate smoothly in each department due to data.

In order to solve this problem, there is an attempt to lighten the 3D CAD model by merging objects up to the topmost object on a hierarchical structure (tree structure) or by integrating the 3D CAD model itself into one object.

However, in the case of such an attempt, the part number assigned to each part in the process of merging objects disappears or the hierarchical structure is mixed, and as a result, the use of lightweight 3D CAD models in terms of production management such as PLM system or ERP system is limited A problem is occurring.

Korean Patent Registration No. 10-155174

The present invention was conceived to solve the above problems, and an object of the present invention is to increase the screen output speed by reducing the amount of output calculation of the 3D CAD model by reducing the weight of the 3D CAD model hierarchical structure. It is to provide a method and apparatus for lightening the hierarchical structure of a 3D CAD model that can be smoothly driven.

Another object of the present invention is to provide a method and apparatus for lightening the hierarchical structure of a 3D CAD model that can be utilized for production management by merging objects into a higher level object required for a production procedure, and generates a file of a lightweight 3D CAD model. will be.

Another object of the present invention is to prevent the problem that the part number disappears or the structure is mixed during the merging process by not performing the merging for the object in the bug report, so that the 3D CAD model can be used in terms of production management such as PLM and ERP systems. It is to provide a method and apparatus for lightening the hierarchical structure of 3D CAD models in which files can be utilized.

Another object of the present invention is to provide a method and apparatus for lightening the hierarchical structure of a 3D CAD model capable of automatically merging an object without a part number into a higher object.

Another object of the present invention is to reduce the hierarchical structure of a 3D CAD model that promotes user convenience by having a user interface that displays the 3D CAD model image before merging, the 3D CAD model image after merging, and the accumulated 3D CAD model image after merging. It is to provide a method and apparatus.

Another object of the present invention is to provide a method and apparatus for lightening the hierarchical structure of a 3D CAD model that solves inconvenience caused by rework by checking and proceeding with merging results for each object.

The method for reducing the hierarchical structure of a 3D CAD model according to the present invention for achieving the above object includes: generating a bug report, displaying a hierarchical structure of a 3D CAD model including a plurality of objects having respective part numbers , Receiving a user input for selection of at least one object among the hierarchical structure of the 3D CAD model, displaying a 3D CAD model image of at least one selected object upon receiving the user input, and the bug report The hierarchical structure of the 3D CAD model may include generating a lightweight 3D CAD model file with lighter weight.

The generating of the bug report includes obtaining a 3D CAD model, a block structure file, and a Product Lifecycle Management (PLM) file, part numbers of a plurality of objects in a hierarchical structure of the 3D CAD model, and a plurality of objects in a block structure file. The step of determining whether the part numbers of each object are matched with each other by matching the part numbers of the PLM file and the part numbers of a plurality of objects in the PLM file, and as a result of the determination, a bug report is generated for objects whose part numbers do not match. It may include the step of.

Displaying the 3D CAD model image of the selected at least one object includes a first display step of displaying a 3D CAD model image before merging of the at least one selected object, and displaying the 3D CAD model image after merging of the at least one selected object. A second display step of performing, and a third display step of displaying the accumulated 3D CAD model image after merging of the at least one selected object.

The first display step, the second display step, and the third display step may be performed simultaneously.

The first display step, the second display step, and the third display step may be sequentially performed.

The second display step may be performed based on a user input for the merging process.

The third display step may be performed based on a user input for the accumulated progress.

The step of creating a lightweight 3D CAD model file includes receiving a user input for generating a lightweight 3D CAD model file for at least one selected object, and comparing an object matching the object in the bug report among objects to be merged. Determining the object to be merged, and generating a lightweight 3D CAD model file in which the hierarchy structure of the 3D CAD model is lightened by merging the objects other than the object to be merged.

The step of generating the lightweight 3D CAD model file may further include performing automatic merging of an object not having a part number into a parent object.

The computer-readable recording medium according to the present invention for achieving the above object may contain a computer program including instructions for executing a method for reducing the weight of a hierarchical structure of a 3D CAD model.

The apparatus for reducing the weight of the hierarchical structure of a 3D CAD model according to the present invention for achieving the above object includes at least one processor, a memory, and a program stored in the memory and configured to be executed by the at least one processor, , The program includes generating a bug report, displaying a hierarchical structure of a 3D CAD model including a plurality of objects each having a part number, and selecting at least one object from among the hierarchical structures of the 3D CAD model. Receiving a user input for, according to receiving the user input, displaying a 3D CAD model image of at least one selected object, and light weight 3D CAD in which the hierarchical structure of the 3D CAD model is lightened by referring to the bug report It may include a command for executing the step of generating the model file.

According to the present invention, by reducing the hierarchical structure of the 3D CAD model, there is an effect that the output operation amount of the 3D model is reduced, thereby increasing the screen output speed, and smoothly driving even on a low-end device.

According to the present invention, there is an advantage of creating a lightweight 3D CAD model file that can be utilized for production management by merging objects into a higher level object required for a production process, rather than simply merging objects into the top object in a hierarchical structure.

According to the present invention, since the object in the bug report is not merged, the problem that the part number disappears or the structure is mixed during the merge process is prevented, so that the 3D CAD model file can be utilized in the aspect of production management such as a PLM system. There is an advantage.

According to the present invention, it is possible to automatically merge an object without a part number into an upper object, thereby facilitating weight reduction of the hierarchical structure of a 3D CAD model.

According to the present invention, a user interface that displays a 3D CAD model image before merging, a 3D CAD model image after merging, and an accumulated 3D CAD model image after merging is provided, thereby promoting user convenience.

According to the present invention, there is an advantage of solving the inconvenience caused by rework by checking and proceeding with the merging result for each object.

1 schematically shows a flow chart of a method for lightening a hierarchical structure of a 3D CAD model according to an embodiment of the present invention.
2 is a schematic flowchart of a process of generating a bug report according to an embodiment of the present invention.
3 schematically illustrates a 3D CAD model and a hierarchical structure thereof according to an embodiment of the present invention.
4 schematically illustrates a user interface according to an embodiment of the present invention.
5 schematically shows a procedure for a process of generating a lightweight 3D CAD model file according to an embodiment of the present invention.
6 schematically shows a procedure for a process of generating a lightweight 3D CAD model file according to another embodiment of the present invention.
7 is a block diagram of an apparatus for reducing weight of a hierarchical structure of a 3D CAD model according to an embodiment of the present invention.

It should be noted that technical terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present specification should be interpreted as generally understood by those of ordinary skill in the technical field to which the present invention belongs, unless otherwise defined in the present specification, and excessively comprehensive It should not be construed as a human meaning or an excessively reduced meaning. In addition, when a technical term used in the present specification is an incorrect technical term that does not accurately express the spirit of the present invention, it will be replaced with a technical term that can be correctly understood by those skilled in the art to be understood.

In addition, general terms used in the present invention should be interpreted as defined in the dictionary or according to the context before and after, and should not be interpreted as an excessively reduced meaning.

In addition, the singular expression used in the present specification includes a plurality of expressions unless the context clearly indicates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various elements or various steps described in the specification, and some of the elements or some steps It may not be included, or it should be interpreted that it may further include additional elements or steps.

Hereinafter, the present invention will be described in more detail through examples, but the scope of the present invention is not limited to the following examples.

1 schematically shows a flow chart of a method for lightening a hierarchical structure of a 3D CAD model according to an embodiment of the present invention.

Referring to FIG. 1, a method for lightening the hierarchical structure of a 3D CAD model (S100) according to an embodiment of the present invention includes generating a bug report (S110), and displaying the hierarchical structure of the 3D CAD model (S120). , Receiving a user input for selection of at least one object among the hierarchical structure of the 3D CAD model (S130), and displaying a 3D CAD model image of the selected at least one object upon receiving the user input (S140) ), and generating a lightweight 3D CAD model file in which the hierarchical structure of the 3D CAD model is lightened by referring to the bug report (S150).

2 is a schematic flowchart of a process of generating a bug report according to an embodiment of the present invention.

Referring to FIG. 2, the step of generating a bug report (S110) includes obtaining a 3D CAD model, a block division file, and a Product Lifecycle Management (PLM) file (S112), a hierarchical structure of the 3D CAD model. Matching the part numbers of the plurality of objects in the block structure file, the part numbers of the plurality of objects in the block structure file, and the part numbers of the plurality of objects in the PLM file, and determining whether the part numbers for each object are mutually identical (S114) And, as a result of the determination, generating a bug report for an object whose part numbers are inconsistent with each other (S116).

When creating a 3D CAD model, a block structure file is created, and the generated block structure file is stored in the data server.

In step S112, a 3D CAD model is obtained from a 3D CAD server (not shown), a block structure file is obtained from a data server (not shown), and a PLM file can be obtained from a PLM server (not shown).

In step S114, each object in the obtained 3D CAD model, each object in the obtained block structure file, and each object in the obtained PLM file are matched for each object, and the part numbers of each matched object are Determine if they match.

It is preferable that the determination as to whether the part numbers of each object coincide with each other is performed sequentially or simultaneously for all of the plurality of objects.

If the part numbers of one object in the block structure file matched with one object in the 3D CAD model and one object in the PLM file, that is, any one of the three objects, do not match, in step S116, a bug for the object is Generate a report.

If the part numbers of all three objects match, a bug report for the object is not generated.

The generated bug report is used when generating a lightweight 3D CAD model file to be described later, which will be described in detail in the relevant section.

3 schematically illustrates a 3D CAD model and a hierarchical structure thereof according to an embodiment of the present invention.

Referring to FIG. 3, each object in the hierarchical structure H corresponds to the 3D CAD model M.

The hierarchical structure H is composed of an upper object and a lower object below the object.

A part number may be assigned to each object. In the case of the object 10, a part number '1350-31P' is assigned.

There are four sub-objects 12, 14, 16, 18 under the object 10, and the part numbers '1245P', '1246P','for each of the four objects 12, 14, 16, 18. 1247P' and '1248P' are given.

Further, the lowermost object 22, 24, 26 is not assigned a part number, but only shape information such as a cylinder, a cylinder, and a line is given.

In the present embodiment, the lowermost object to which a part number is not assigned exists, but in another embodiment, a part number may be assigned to all objects constituting the 3D CAD model.

4 schematically illustrates a user interface according to an embodiment of the present invention.

Referring to FIG. 4, a hierarchical structure 30 of a 3D CAD model is displayed in an area O on the user interface.

The 3D CAD model hierarchical structure 30 includes a plurality of objects, and each object is assigned a respective part number (Part Numbers 1 to 17).

Input boxes B1 to B17 are provided on the right side of each object constituting the 3D CAD model hierarchical structure 30 to receive a selection for the corresponding object.

When a user selection for an object is input, for example, when a user selection for the input box (B15) is input, the input box (Part Num 15) for the lower five objects (Part Num 150 to 154) below the object (Part Num 15) B15a to B15e) are selected.

As the user input is received, the 3D CAD model image of the selected object (Part Num 15 and Part Num 150 to 154) is displayed in another area on the user interface.

At this time, the 3D CAD model image of the selected object can be divided into three images.

One image may be a 3D CAD model image 40 before merging of the selected object, another image may be a 3D CAD model image 50 after merging of the selected object, and the remaining images may be selected by a user for each object. As it is accumulated twice, it may be an accumulated 3D CAD model image 60 after merging.

The 3D CAD model image 40 before merging, the 3D CAD model image 50 after merging, and the accumulated 3D CAD model image 60 after merging may be displayed in different areas on the user interface, respectively.

The 3D CAD model image 40 before merging may be displayed in the area P, the 3D CAD model image 50 after merging may be displayed in the area Q, and the accumulated CAD 3D model image 60 after merging may be displayed in the area R. have.

In this case, the 3D CAD model image 40 before merging, the 3D CAD model image 50 after merging, and the accumulated 3D model CAD image 50 after merging may be simultaneously displayed.

In an alternative embodiment, the 3D CAD model image 40 before merging, the 3D CAD model image 50 after merging, and the accumulated 3D CAD model image 60 after merging may be sequentially displayed.

When sequentially displayed, the display of the 3D CAD model image 50 after merging may be performed based on a user input for merging progress.

An input window C through which a user input can be received is provided on the user interface.

After merging, the display of the accumulated 3D CAD model image 60 may be performed based on a user input for the accumulated progress. An input window D is provided on the user interface for receiving a user input for the accumulated progress.

In this way, by receiving user input for selecting each object in the hierarchical structure and displaying the 3D CAD model image before merging of the selected object, the merged 3D CAD model image, and the accumulated 3D CAD model image after merging, the user merges before and after merging. Afterwards, it is possible to check the accumulated merge result and proceed with the creation of a lightweight 3D CAD file, which has the advantage of solving the inconvenience of reworking because the degree of light weight is not appropriate.

5 schematically shows a procedure for a process of generating a lightweight 3D CAD model file according to an embodiment of the present invention.

Referring to FIG. 5, the step of generating a lightweight 3D CAD model file 150 includes receiving a user input for generating a lightweight 3D CAD model file for at least one selected object (S152), and the selected at least one object Determining an object that matches the object in the bug report among the objects as a non-merge target (S154), and creates a lightweight 3D CAD model file with a lightweight 3D CAD model hierarchy by merging the remaining objects excluding the non-merge target It may include a step (S156).

Previously, after checking the accumulated merge result through the user interface of FIG. 4, if it is determined that a desired level of weight reduction has been achieved, a user input for generating a lightweight 3D CAD file is received in step S152. The user input may be made through a file creation window provided on the user interface of FIG. 4.

In step S154, as the user input is received, it is checked whether there is an object that matches the object in the previously generated bug report among the objects to be merged, and if there is a matching object, the object is determined as a non-merge target. do.

This is because when merging is performed on the object that matches the object in the bug report, the part number disappears or the hierarchical structure is mixed.

When such a problem occurs, the generated lightweight 3D CAD model file is limited in use in a PLM system or the like.

In step S156, a lightweight 3D CAD model file in which the hierarchy structure of the 3D CAD model is lightened is generated by merging the remaining objects except for the determined object to be non-merging.

The generated lightweight 3D CAD model file increases the screen output speed by reducing the output calculation amount of the 3D model, and achieves the effect of smoothly running even on low-spec devices.

In addition, merging is not performed for objects whose part numbers do not match among the objects matched in the 3D CAD model, block structure file, and PLM file, so the generated lightweight 3D CAD model file is not limited in utility in PLM systems, etc. There is an advantage.

6 schematically shows a procedure for a process of generating a lightweight 3D CAD model file according to another embodiment of the present invention.

Referring to FIG. 6, in the step of generating a lightweight 3D CAD model file (S150), in addition to the above-described steps (S152, S154, S156), an object without a part number is automatically merged into a parent object. It may further include performing the step (S158).

In step S158, the lowermost object (22, 24, 26) to which the part number is not assigned and only shape information such as cylinders, cylinders, and lines as described in Fig. 3 is automatically merged into the upper object. Perform.

Due to the automatic merging of the lowermost object, the weight reduction of the 3D CAD model's hierarchical structure can be further promoted.

Since the descriptions of the steps S152, S154, and S156 are the same as those described above, a description thereof will be omitted.

7 is a block diagram of an apparatus for reducing weight of a hierarchical structure of a 3D CAD model according to an embodiment of the present invention.

Referring to FIG. 7, the apparatus 100 for reducing a hierarchical structure of a 3D CAD model may include a communication unit 110, at least one processor 120, and a memory 130.

7 shows only the components related to the embodiment of the present invention. Therefore, it is apparent to those skilled in the art to which the present invention belongs, that other general-purpose components may be further included in addition to the components shown in FIG. 7.

The communication unit 110 is connected to the processor 120 and the memory 130 to transmit and receive data. The communication unit 110 may be connected to other external devices to transmit and receive data.

The expression "transmitting/receiving A" may refer to transmitting/receiving "information or data representing A".

The communication unit 110 may be implemented as a circuitry in the apparatus 100 for reducing the weight of a hierarchical structure of a 3D CAD model.

For example, the communication unit 110 may include an internal bus and an external bus.

As another example, the communication unit 110 may be an element that connects the apparatus 100 for reducing the weight of the hierarchical structure of the 3D CAD model and an external device.

The communication unit 110 may be an interface. The communication unit 110 may receive data from an external device and transmit the data to the processor 120 and the memory 130.

The processor 120 controls the overall operation of each component of the apparatus 100 for reducing the weight of the hierarchical structure of the 3D CAD model. The processor 120 processes data received by the communication unit 110 and data stored in the memory 130.

The processor 120 includes a CPU (Central Processing Unit), MPU (Micro Processor Unit), MCU (Micro Controller Unit), GPU (Graphic Processing Unit), or any type of processor well known in the technical field of the present invention. Can be.

In addition, the processor 120 may perform an operation on at least one application or program for executing the method according to the embodiments of the present invention.

The processor 120 executes computer-readable code (eg, software) stored in the memory 130 and instructions generated by the processor 120.

The memory 130 stores data received by the communication unit 110 and data processed by the processor 120.

The memory 130 may store a program. The stored program may be a set of syntaxes that are coded to lighten the hierarchical structure of the 3D CAD model and executed by the processor 120.

According to an aspect, the memory 130 may include one or more volatile memories, nonvolatile memories and random access memories (RAM), flash memories, hard disk drives, and optical disk drives.

The memory 130 stores an instruction set (eg, software) for operating the apparatus 100 for reducing a hierarchical structure of a 3D CAD model.

An instruction set for operating the apparatus 100 for reducing the weight of a hierarchical structure of a 3D CAD model is executed by the processor 120.

The program can reduce the weight of the hierarchical structure of the 3D CAD model according to the embodiment of the present invention.

The program is stored in the memory 120, the step of generating a bug report by the at least one processor 110, a hierarchical structure of a 3D CAD model including a plurality of objects each having a part number Displaying, receiving a user input for selecting at least one object from among the hierarchical structure of the 3D CAD model, displaying a 3D CAD model image of the selected at least one object upon receiving the user input, And a command for executing the step of generating a lightweight 3D CAD model file in which the hierarchical structure of the 3D CAD model is lightened with reference to the bug report.

The method for reducing the weight of a 3D CAD model hierarchy structure according to an exemplary embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium.

The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the embodiment, or may be known and usable to those skilled in computer software.

Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -A hardware device specially configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like.

Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operation of the embodiment, and vice versa.

The software may include a computer program, code, instructions, or a combination of one or more of these, configuring the processing unit to operate as desired or processed independently or collectively. You can command the device. Software and/or data may be interpreted by a processing device or to provide instructions or data to a processing device, of any type of machine, component, physical device, virtual equipment, computer storage medium or device. , Or may be permanently or temporarily embodyed in a transmitted signal wave. The software may be distributed over networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

As described above, although the embodiments have been described by the limited embodiments and drawings, various modifications and variations are possible from the above description by those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as a system, structure, device, circuit, etc. described are combined or combined in a form different from the described method, or other components Alternatively, even if substituted or substituted by an equivalent, an appropriate result can be achieved.

100 3D CAD models hierarchical structure lightweight device
110 Department of Communications
120 processors
130 memory

Claims (11)

In the method for reducing the weight of the hierarchy structure of the 3D CAD model performed by the device for reducing the weight of the hierarchy structure of the 3D CAD model,
Generating a bug report;
Displaying a hierarchical structure of a 3D CAD model including a plurality of objects each having a part number;
Receiving a user input for selecting at least one object in the hierarchical structure of the 3D CAD model;
Displaying a 3D CAD model image of at least one selected object upon receiving the user input; And
Including; generating a lightweight 3D CAD model file in which the hierarchical structure of the 3D CAD model is lightweight
Generating the bug report,
Obtaining a 3D CAD model, a block structure file, and a Product Lifecycle Management (PLM) file;
Part numbers of a plurality of objects in a hierarchical structure of the 3D CAD model, part numbers of a plurality of objects in a block structure file, and part numbers of a plurality of objects in a PLM file are matched to each other, and whether the part numbers for each object are mutually matched. Determining to; And
Including; as a result of the determination, generating a bug report for an object whose part numbers do not match each other,
The step of generating the lightweight 3D CAD model file,
Receiving a user input for generating a lightweight 3D CAD model file for at least one selected object;
Determining an object that matches the object in the bug report among the objects to be merged as a non-merge target; And
And generating a lightweight 3D CAD model file whose hierarchical structure of the 3D CAD model is lightened by merging the remaining objects except for the non-merging object, without disappearing part numbers or mixing of the hierarchical structure during the object merging process. How to lighten the hierarchical structure of 3D CAD models. delete The method of claim 1,
Displaying the 3D CAD model image of the selected at least one object,
A first display step of displaying a 3D CAD model image before merging of at least one selected object;
A second display step of displaying a 3D CAD model image after merging of the at least one selected object; And
And a third display step of displaying a cumulative 3D CAD model image after merging of the at least one selected object. The method of claim 3,
Wherein the first display step, the second display step, and the third display step are performed simultaneously. The method of claim 3,
The first display step, the second display step, and the third display step are performed sequentially. The method of claim 5,
The second display step is performed based on a user input for a merge process. The method of claim 5,
The third display step is performed based on a user input for the cumulative progress. delete The method of claim 1,
The steps to create a lightweight 3D CAD model file are:
A method for reducing the weight of a hierarchical structure of a 3D CAD model, further comprising: merging an object that does not have a part number into an upper object. A computer readable recording medium containing a computer program including instructions for executing the method of any one of claims 1, 3 to 7, and 9. In the 3D CAD model hierarchical structure lightweight device,
At least one processor;
Memory; And
A program stored in the memory and configured to be executed by the at least one processor; and
The above program,
Generating a bug report,
Displaying a hierarchical structure of a 3D CAD model including a plurality of objects each having a part number,
Receiving a user input for selection of at least one object in the hierarchical structure of the 3D CAD model,
In response to receiving the user input, displaying a 3D CAD model image of at least one selected object, and
The hierarchical structure of the 3D CAD model includes a command for executing the step of creating a lightweight 3D CAD model file with lighter weight,
Generating the bug report,
Obtaining a 3D CAD model, a block structure file, and a Product Lifecycle Management (PLM) file;
Part numbers of a plurality of objects in a hierarchical structure of the 3D CAD model, part numbers of a plurality of objects in a block structure file, and part numbers of a plurality of objects in a PLM file are matched to each other, and whether the part numbers for each object are mutually matched. Determining to; And
Including; as a result of the determination, generating a bug report for an object whose part numbers do not match each other,
The step of generating the lightweight 3D CAD model file,
Receiving a user input for generating a lightweight 3D CAD model file for at least one selected object;
Determining an object that matches the object in the bug report among the objects to be merged as a non-merge target; And
And generating a lightweight 3D CAD model file whose hierarchical structure of the 3D CAD model is lightened by merging the remaining objects except for the non-merging object, without disappearing part numbers or mixing of the hierarchical structure during the object merging process. Hierarchical structure lightweight device for 3D CAD models.

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