KR20150030810A - Method of generating pmi in light model - Google Patents

Abstract

The present invention relates to a method for generating PMI from a lightweight model and, more specifically, to a method for generating PMI from a lightweight model, which is capable of generating a lightweight model using data on a 3D model designed by using CAD, generating PMI based on data on the lightweight model, and generating and outputting a lightweight model file including the generated PMI. To achieve this, the method for generating PMI from a lightweight model comprises: a lightweight model generating step of generating a lightweight model by using CAD data; a PMI calculating step of calculating production information and dimension information of the lightweight model generated in the lightweight model generating step using the CAD data and the lightweight model; a PMI generating step of generating the production information and the dimension information calculated in the PMI calculating step to the lightweight model; a file generating step of generating a lightweight model file including the PMI data after the PMI generating step; and an output step of outputting the lightweight model file generated in the file generating step.

Description

METHOD OF GENERATING PMI IN LIGHT MODEL < RTI ID = 0.0 >

The present invention relates to a method of generating a PMI in a lightweight model, and more particularly, to a method of generating a lightweight model using data of a 3D model designed using CAD and generating a PMI based on data of the lightweight model And to a method for generating a PMI in a lightweight model capable of generating and outputting a lightweight model file containing the PMI.

Generally, in general, a design method using a mold composed of 20,000 to 30,000 parts assembly assemblies has been made to improve the mechanical structure and functionality, and it is very complicated for each process.

In order to design a product that is required in the conventional mold design, the designer designed the mold by interactive manual using a computer aided design (CAD) for each process.

However, since the conventional mold designing method uses a manual method of inputting corresponding values, it takes a lot of time, and design quality errors are caused according to the skill of the designer.

Thus, in the conventional mold design method, processing is not performed according to the order of the developer at the time of processing or after processing, and the material is lost due to disposal thereof.

In addition, the conventional mold designing method has to take out and modify each part design chart, and since the modified part has to be inputted as the key operation, the work time of the worker becomes longer, so that the work efficiency is not improved.

In addition, according to a conventional design, time required for designing is different for each designer, and for an inexperienced designer, it takes a long time to design a mold because a separate career is required.

In addition, when designing a mold similar to a previously designed mold, it is impossible to directly use the existing design data, and only the design know-how can be used, and it is troublesome for the operator to directly judge the similarity of the mold itself.

As a prior art related to this, domestic patent publication No. 2011-0121451 (automatic mold designing system and control method using 3D CAD data, published on Nov. 11, 2011) is available.

The present invention generates a lightweight model using a 3D model designed using CAD, generates pXML data including production information and numerical information using the CAD data and the lightweight model of the 3D model, And a method for generating a PMI in a lightweight model capable of generating a lightweight model file including numerical information.

Another object of the present invention is to output the production information PMI and numerical information included in the lightweight model file together or to output only the lightweight model.

In order to solve the above problems,

The present invention relates to a lightweight model generating step of generating a lightweight model using CAD data, a PMI calculating step of calculating production information and dimensional information of the lightweight model generated in the lightweight model generating step using the CAD data and the lightweight model, A PMI generation step of generating the production information and the dimension information calculated in the PMI calculation step in the lightweight model; and a file creation step of generating a lightweight model file including the production information and the dimension information after the PMI generation step And outputting the light model file generated in the file generation step.

The PMI calculation step may include calculating the production information of the lightweight model by loading the CAD data into the conversion server, calculating the dimension information of the lightweight model using the shape information of the lightweight model in the conversion server, .

The PMI calculation step generates pXML data including production information and dimension information of the lightweight model calculated in the PMI calculation step.

The file creation step arranges the production information and the dimension information of the lightweight model according to the PMI generation rule previously stored in the conversion server using the pXML data generated in the PMI calculation step.

The file generation step may generate the lightweight model file including the dimension information and the production information of the lightweight model modeled on the hull and the piping of the ship.

The outputting step may further include a converting step of converting the light model file generated in the file creating step into a PDIF file.

The outputting step may output both the production information and the numerical information included in the lightweight model file when the lightweight model file generated in the file generation step is output together or only the lightweight model may be output.

According to the solution of the above problems,

The present invention can generate a lightweight model file including production information and numerical information by using the CAD data and the lightweight model to generate a PMI so that a separate operation for inputting the production information and the dimension information to the lightweight model is not required It is effective.

In addition, the user can easily confirm the 3D model through the lightweight model, and can also intuitively confirm the production information and dimensional information on the 3D model.

In addition, when the lightweight model file including the production information and the numerical information is output, the production information and the numerical information may be output together, or only the lightweight model may be output, so that the user can easily output desired information .

1 is a flow chart illustrating a method for generating a PMI in a lightweight model according to the present invention;
Figure 2 illustrates an embodiment using a method for generating PMI in a lightweight model according to the present invention.
3 shows an embodiment of a lightweight model output by a method for generating PMI in a lightweight model according to the invention;

The present invention will now be described in detail with reference to the accompanying drawings.

Hereinafter, a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

And embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art.

Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

The PMI referred to in the present invention is an abbreviation of Product Manufacturing Information, which means that dimensions and various information are input on a 3D model, and dimensions and various information are output together with the 3D model.

The present invention can automatically generate information on such PMI based on a lightweight model generated using CAD data, and will be described below with reference to the drawings attached to the present invention.

FIG. 1 is a flowchart illustrating a method for generating a PMI in a lightweight model according to the present invention, and FIG. 2 illustrates an embodiment using a method for generating a PMI in a lightweight model according to the present invention.

The present invention will be described with reference to FIGS. 1 and 2. FIG. 2 is a flowchart illustrating a lightweight model generating step S100 for generating a lightweight model using CAD data, A PMI calculation step (S200) of calculating production information and dimensional information of the lightweight model, a PMI generation step (S300) of generating production information and dimension information calculated in the PMI calculation step (S200) in the lightweight model, A file generation step S400 for generating a lightweight model file including the production information and the numerical information after the PMI generation step S300 and an output step S500 for outputting the lightweight model file generated in the file generation step S400 ).

The CAD data is data obtained by 3D modeling the ship hull and piping in the field of ship design using a ship design exclusive CAD program such as a tri-bone. In the lightweight model generation step, the CAD data is loaded into a conversion server, The lightweight model is created using the data (S100).

The PMI calculation step S200 includes a step S200 of calculating production information and dimensional information of the lightweight model using the CAD data and the lightweight model generated in the lightweight model generation step S100, (S210) of calculating the production information of the lightweight model by loading the conversion model information into the conversion server, and calculating the dimension information of the lightweight model using the shape information of the lightweight model generated in the lightweight model generation step ).

That is, the PMI calculation step (S200) loads the CAD data into the conversion server and calculates production information and dimensional information of the lightweight model based on the CAD data.

Then, the production information and the dimension information of the lightweight model calculated in the PMI calculation step (S200) are generated in the lightweight model (S300).

Here, the PMI calculation step (S200) generates pXML data including the production information and the dimension information calculated in the PMI calculation step (S200) when calculating the production information and the dimension information of the lightweight model, The PMI generation step S300 is to generate the pXML data including the production information and the dimension information in the lightweight model.

The pXML includes general information of the actual product of the lightweight model such as the production information, the dimension information, the material information, and the processing information of the lightweight model.

The file generation step S300 is a step of generating a light model file including the production information and the dimension information (more specifically, the pXML data) A lightweight model file including production information and dimensional information is generated (S400) by arranging the production information and dimension information in the lightweight model at an appropriate place according to PMI generation rules previously stored in the PMI generation rule.

In the output step, the production information and the numerical information are arranged at appropriate positions on the drawing when the lightweight model file is output, so that the worker Thereby facilitating identification of the production information and the numerical information.

As described above, in the outputting step S500, the lightweight model outputs and outputs the production information and the numerical information appropriately according to the outputting of the lightweight model file. If necessary, the lightweight model outputs the lightweight model It is possible to set ON / OFF such that only the lightweight model is outputted except for the production information and numerical information included in the file.

The outputting step S500 may further include a converting step of converting the light model file generated in the file creating step into a PDF file.

Accordingly, the lightweight model file generated by the method according to the present invention can be easily output to an electronic document such as a mobile or a 3D PDIF (PDF) which can not calculate the dimension information of the lightweight model, .

Fig. 3 is a diagram showing an embodiment of a lightweight model output by a method for generating PMI in a lightweight model according to the present invention. Fig. 3 (a) shows a hull designed with CAD by a method according to the present invention A lightweight model is generated and dimension information of a panel and a stiffener of the hull are output together with lightweight modeling.

3 (a), the PMI generation rules for arranging the numerical information of the panel and the stiffener are in accordance with the rules according to the following 1-1 and 1-7.

1-1. Defining a panel plane for generating a PMI related to the dimension information by using the transformation matrix value in the pXML data,

1-2. Generating a dimension in the X and Y axis directions of the panel based on the panel boundary value of the pXML data,

1-3. Generating a dimension of the stiffener using the stiffener boundary value in the pXML data,

1-4. The dimension of the stiffener is generated perpendicular to the longitudinal direction of the stiffener,

1-5. When the stiffener is inclined, curved, or curved instead of vertically or horizontally with respect to the panel surface, numerical information is generated on both end points of the stiffener,

1-6. Numerical information of the stiffener is generated on a plane perpendicular to the panel surface,

1-7. If the stiffener has a mounting angle, the angle is expressed.

FIG. 3 (b) is a diagram showing a lightweight model including production information of a hole, a seam, a notch, a margin and a bevel of a hull.

3 (b), the PMI generation rule for arranging production information of a hole, a seam, a notch, a margin, and a bevel of a hull is shown in the following 2-1 And 2-10.

2-1. The production information of the margin is generated using the access information from the panel information of the pXML data.

However, the direction of the production information of the margin may be seen in the opposite direction depending on the rotation direction of the view due to the characteristics of the PMI.

2-2. Generates bevel production information from the panel information in the pXML data as a bevel value,

2-3. Generating notch production information from the pXML data on a notch basis in a panel information note,

2-4. The position where the production information of the notch is generated is generated in the center direction of the panel at the reference point,

2-5. Generates production information of a hole based on a hole in the panel information in the pXML data,

2-6. The position where the production information of the hole is generated is generated around the reference point,

2-7. When the shape of the hole is a slot or an ellipse, only the horizontal and vertical length values excluding the two English digits are represented in the hole detailed information,

2-8. Generates production information of a spring based on a spring reference in the panel information in the pXML data,

2-9. The access portion of the text of the production information of the thumb uses the right value and the left value in the direction of the end point from the start point,

2-10. The production location of the seed production information is generated at the center of the reference line leading from the start point to the end point.

Fig. 3 (c) is a diagram showing a lightweight model including numerical information of the piping of the hull.

The PMI generation rule for disposing numerical information in the pipeline lightweight model of the hull in FIG. 3 (c) follows the rules according to 3-1 and 3-6 below.

3-1. The length of the pipe generates numerical information with reference to the point of intersection with the next part,

3-2. When the path of the pipe is a diagonal direction that is not parallel to the axis, numerical information is generated in each unit direction,

3-3. The plane on which the numerical information is to be generated defines the reference plane as two points of the numerical value to be generated and one point in the following part, a total of three points (see 3-3-1 to 3-3-3 below).

3-3-1. The intersection point between the current part and the next part is the origin

3-3-2. The other one point direction of the current part at the origin is in the X direction

3-3-3. When the point direction of the next part from the origin is the Y direction

3-4. The text generation position of the numerical information is generated at a distance of three times the text size of the predefined numerical value from the center line of the pipe in the Y direction of the defined generation plane,

3-5. The elbow is angled to note PMI,

3-6. The notch PMI generation plane of the elbow is determined as described above.

As shown in FIGS. 3 (a), 3 (b) and 3 (c), a lightweight model is generated using CAD data by using a method of generating PMI in the lightweight model according to the present invention, Since the PMI of the model, that is, the numerical information and the production information are outputted together, it is not necessary for the user to input the data value of the PMI of the lightweight model separately in each part of the lightweight model, And there is an advantage that it can be done quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken as limitations. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (7)

A lightweight model generation step of generating a lightweight model using CAD data;
A PMI calculation step of calculating production information and dimensional information of the lightweight model generated in the lightweight model generation step using the CAD data and the lightweight model;
A PMI generation step of generating production information and dimension information calculated in the PMI calculation step in the lightweight model;
A file generation step of generating a lightweight model file including the production information and the dimension information after the PMI generation step; And
And outputting the lightweight model file generated in the file generation step. The method according to claim 1,
The PMI calculation step includes:
Loading the CAD data into the conversion server and calculating production information of the lightweight model;
And calculating dimension information of the lightweight model using the shape information of the lightweight model in the conversion server. The method of claim 2,
The PMI calculation step includes:
And generating pXML data including production information and dimensional information of the lightweight model calculated in the PMI calculation step. The method of claim 3,
Wherein the file generation step comprises:
Wherein the production information and the dimension information of the lightweight model are arranged according to a PMI generation rule previously stored in the conversion server using the pXML data generated in the PMI calculation step. The method of claim 4,
Wherein the file generation step comprises:
A lightweight model file including dimension information and production information of a lightweight model modeled by the ship hull and piping can be generated. The method according to claim 1,
Wherein the outputting step comprises:
And converting the light model file generated in the file generation step into a PDF file. The method of claim 1, further comprising: The method according to claim 1,
Wherein the outputting step comprises:
The production information and the numerical information included in the lightweight model file may be output together or only the lightweight model may be output upon outputting the lightweight model file generated in the file generation step. How to.

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