JP2002197129A - Three-dimensional model producing tool for piping design system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently produce a three-dimensional model of each component at a low cost, in a piping design system by a three-dimensional CAD. SOLUTION: This three-dimensional model producing tool for a piping design system comprises an image data converting means 20 converting the shape of a component drawn on a two-dimensional drawing such as a hand-writing drawing and a catalogue into image data and capturing that, and a three- dimensional model producing program 35 for the image data producing a three- dimensional model in a specified data format by pushing out from the shape of the captured image data and rotating or cutting and pasting. As necessary, this three-dimensional model producing tool for a piping design system comprises a middle format data converting means 21 converting the two-dimensional shape data produced by a two-dimensional CAD or a three-dimensional shape data produced by a different type three-dimensional CAD into middle format data to capture, and three-dimensional model producing programs 36, 37 producing a three-dimensional model in a specified data format from the captured shape data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional model creation tool for creating a three-dimensional model of each component installed before piping when designing piping by three-dimensional CAD.

[0002]

2. Description of the Related Art In general, graphic CAD data of a CAD system adopts a data format unique to each CAD system, and it is extremely rare that graphic CAD data can be directly read and written between different CAD systems. That is, as shown in the upper part of FIG.
In most cases, data cannot be directly used between ADs.

At present, graphic CAD is mutually exchanged between different CADs.
In order to utilize the data, the graphic CAD data created by each CAD is temporarily converted into a common data file as shown in the lower part of FIG. 6, and this data file is called an intermediate format. There are many standardized formats. For example, IGES, ST
EP, DXF, DESIGNBASE, STL, COS
MOS or CATIA.

[0004]

For example, when designing piping in an engine room of a ship, there are the following problems in a current three-dimensional CAD system for a piping design system. (1) In three-dimensional CAD, handwritten drawings, catalogs, etc.
It is difficult to read a two-dimensional CAD data of a three-dimensional drawing or another company, and a very expensive system is required to enable it. In addition, in the case of a company's two-dimensional CAD, it takes time and effort to import the graphic data into the three-dimensional CAD. Therefore, handwritten drawings and catalogs
Even if there is a two-dimensional CAD data of a three-dimensional drawing or another company, it is very difficult to efficiently use it for piping design.

(2) As shown in the design flow of FIG. 8, in the current three-dimensional CAD system for piping design, each component disposed in the engine room of a ship, for example, an engine, a generator,
The process of creating a part model of a deceleration reversing machine or a tank by CAD from the beginning, and placing each of the created part models in the engine room displayed on the CAD, and also for piping of parts required for piping. The piping design is completed through a process of creating a mechanism model for positioning the connection ports and performing piping.

However, in the process of creating each part model, since a drawing, a catalog or two-dimensional CAD data cannot be directly used as described above, a shape measuring step of measuring a shape and dimension in a three-dimensional CAD system is performed.
A process of creating coordinate values on plane coordinates, a process of forming a surface from the coordinate values and the basic surface shape, a process of arranging a three-dimensional shape such as an arrangement direction, and a correcting process of correcting the shape, texture, etc. Through these steps, a three-dimensional model is created and temporarily stored in a unique format data. By such to create each component in 3D CAD, 2-dimensional C
Even with AD, expensive capital input is required, but 3-dimensional CAD systems require much higher capital input. Also, when creating a part model having a simple shape, an expensive CAD system is required, and expensive investment cannot be avoided.

[0007] (3) In FIG. 7, cost reduction, with the goal of quality improvement or product competitiveness improvement, product planning and product design, design, comprehensive CAD system that consistently to manufacturing and sales carried out by utilizing the CAD data Although it has begun to spread, if a three-dimensional model of each part is created from scratch in CAD as shown in FIG. 8, the cycle from design to manufacturing in FIG. 7 becomes longer, and therefore the time required for quality improvement also increases. It will be long and miss the time to market.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has created a three-dimensional model creation tool for a piping design system that can easily create a three-dimensional model outside a three-dimensional CAD system. the invention of claim 1, wherein the creation and image data converting means for capturing and converting the shape of the drawn part in a two-dimensional drawing image data, the plane figure in a tool along the shape of the image data taken above and, 3 for piping design system characterized by comprising a three-dimensional model generating means for the image data to create a three-dimensional model of a predetermined data format the plane shape extrusion, by bonding rotating or switching It is a dimensional model creation tool.

[0009] According to a second aspect of the invention, in the three-dimensional modeling tool for piping design system according to claim 1,
The 2-dimensional shape data created by a two-dimensional CAD, to create an intermediate format data conversion means for input capture is converted into an intermediate format data, the plane figure in a tool from the two-dimensional shape data taken above And a three-dimensional model creating means for two-dimensional CAD data for creating a three-dimensional model in a predetermined data format by extruding, rotating or cutting and pasting the planar figure.

According to a third aspect of the present invention, there is provided a three-dimensional model creation tool for a piping design system according to the first aspect,
A standard model storage unit that stores a plurality of standard models of the basic three-dimensional shape, an arbitrary model storage unit that stores an arbitrarily created three-dimensional model or a two-dimensional cross-sectional shape, and a storage unit that stores the standard model storage unit or the arbitrary model storage unit. One or a plurality of three-dimensional models or three-dimensional models created by extruding or rotating a two-dimensional cross-sectional shape are selected, and their dimensions, positions, and orientations are determined and arranged. and a three-dimensional model generating means for the standard model to create a dimensional model.

According to a fourth aspect of the present invention, there is provided a three-dimensional model creation tool for a piping design system according to the first aspect,
An intermediate format data conversion means for inputting by converting three-dimensional shape data created by three-dimensional CAD into three-dimensional shape data in an intermediate format, and adding and deleting the captured three-dimensional shape data. A three-dimensional model creating unit for three-dimensional CAD data for creating a three-dimensional model in a predetermined data format.

According to a fifth aspect of the present invention, in the three-dimensional model creation tool for a piping design system according to the first to fourth aspects, the three-dimensional model is divided into at least basic sectional data and control data for extruding or rotating the basic sectional data. It is characterized by being created and stored.

According to a sixth aspect of the present invention, in the three-dimensional model creation tool for a piping design system according to the first to fifth aspects, an output for converting a created three-dimensional model in a predetermined data format into data in an intermediate format is provided. Characterized by having an intermediate format data conversion means.

According to a seventh aspect of the present invention, there is provided a three-dimensional model creation tool for a piping design system according to the first to fifth aspects, wherein the created three-dimensional model in a predetermined data format is unique to a heterogeneous three-dimensional CAD system to be used. It is characterized by having heterogeneous three-dimensional CAD data conversion means for converting to a data format.

According to an eighth aspect of the present invention, there is provided a three-dimensional model creation tool for a piping design system according to the first to fifth aspects, wherein CG data for converting a created three-dimensional model of a predetermined data format into a computer graphic data format. It is characterized by having conversion means.

According to a ninth aspect of the present invention, there is provided a three-dimensional model creation tool for a piping design system according to the fifth to eighth aspects, wherein the three-dimensional model created has a pipe connection position of equipment necessary for piping design. It is characterized by including data.

[0017]

Figure 1 DETAILED DESCRIPTION OF THE INVENTION shows a block diagram of a three-dimensional modeling tool for piping design according to the present invention, 3-dimensional modeling tool 1 is separately in computer and 3D CAD A central processing unit (CPU) 2, a storage device 3, and an input data conversion device 4
And an output data conversion device 5. Input devices include an image input device 10 such as an image scanner or a digital camera, and a disk for reading BMP data of a two-dimensional drawing or two-dimensional or three-dimensional CAD data stored in a disk medium such as an MD, CD, or MO. A drive device 11, an input cable 12 connected to another computer, a keyboard 13, a mouse 14, and the like are connected. Further, such a display 16 and an output cable terminal 17 is connected as an output device.

The input data conversion device 4 has an image data conversion means 20 and an intermediate format data conversion means 21 built therein.
Image input device 10 and the disk drive device 1
Connect to 1, it converts the BMP data of two-dimensional drawing inputted from the image or the disk drive device 11 is inputted from the image input device 10 to the image data input to the CPU 2. The intermediate format data conversion means 21 is connected to the disk drive device 11 and the input cable 12 and converts two-dimensional CAD data or heterogeneous (other company's) three-dimensional CAD data into an intermediate format and inputs it to the CPU 2.

An arithmetic unit 23 and a control unit 2 are provided in the CPU.
4 are built in.

The storage device 3 has a first storage means 31 in which various three-dimensional model creation programs are written, and the created three-dimensional model is stored in a predetermined data format, for example, data in a format corresponding to the company's three-dimensional CAD. There are provided a second storage means 32 for writing, and a third storage means 33 for writing a standard model or the like. The third storage unit 33 includes a standard model storage unit 33a in which various basic three-dimensional models such as a cylinder or a rectangular parallelepiped are written as a standard model, and an arbitrary three-dimensional model or an arbitrary two-dimensional cross-sectional shape written as an arbitrary creation model. It also has a created model storage means 33b.

The three-dimensional model stored in the second storage means 32 or the three-dimensional standard model or the arbitrarily created model stored in the third storage means 33 is, as shown in the data file of FIG. Basic sectional data by color and control data for extruding or rotating the basic sectional data are stored separately, and piping connection position data for specifying the piping connection position of the three-dimensional model is added. The pipe connection position data is data that specifies the center position of a connection port such as a liquid discharge port of a tank or a pump, using the reference point of the basic cross-section data as reference coordinates and taking into account the contents of control data.

Various three-dimensional model creation programs written in the first storage means 31 of FIG. 1 include a three-dimensional model creation program 35 for image data and a three-dimensional model creation program 36 for two-dimensional CAD data.
And a three-dimensional model creation program 37 for three-dimensional CAD data, and a three-dimensional model creation program 38 for a standard model (and an arbitrary creation model).

The program 35 for creating a three-dimensional model for image data is for processing two-dimensional drawings such as design drawings, handwritten drawings or dimensional drawings of catalogs.
As described in the flow of the handwritten drawing in FIG. 2, the part data converted into image data in step S11 is input, and the display 1 is displayed in step S12.
6, a line segment is arranged on plane coordinates in step S13, and a plane figure is formed on plane coordinates in step S14. Based on this, the three-dimensional model is extruded in step S15, and rotated and cut and pasted. Then, in step S16, the shape and the like are corrected to complete a three-dimensional model, and data divided into basic section data, control data for extruding and rotating the same, and pipe connection position data as shown in FIG. 5 in a predetermined data format. As a file,
The data is temporarily written in the second storage means 32 of FIG.

The three-dimensional model creation program 36 for two-dimensional CAD data shown in FIG. 1 is for processing two-dimensional CAD data. As shown in the flow of 2D CAD in FIG. In step S2, the data converted into the intermediate format is input.
In step S23, a line segment is selected, in step S23, a plane figure is created on plane coordinates, in step S24, a three-dimensional model is created by operations such as extrusion, rotation, and cut and paste. The dimensional model is completed, and is temporarily written in the second storage means 32 of FIG. 1 as a data file divided into basic cross-section data, control data for extruding and rotating the same, and pipe connection position data in the predetermined data format.

The three-dimensional model creation program 37 for three-dimensional CAD data shown in FIG. 1 is for processing three-dimensional CAD data created by different types of 3D CAD.
As described in the flow of 3D CAD in FIG. 2, in step S31, the three-dimensional CAD data converted into the intermediate format is input, and steps S32 and S32 are performed.
At 33, a new necessary part is added or an unnecessary part is deleted, and at step S34, the shape and the like are corrected to complete a three-dimensional model.
As a data file that is divided into the basic cross-sectional data and control data, and the pipe connection position data rotating extrusion this,
The data is temporarily written in the second storage means 32 of FIG.

The three-dimensional model creation program 38 for the standard model shown in FIG. 1 extrudes or rotates one or more three-dimensional models or two-dimensional sectional shapes from the standard model storage means 33a or the arbitrary model storage means 33b. Select the 3D models created in the above, determine their dimensions, position and orientation, arrange them and determine the connection position for piping, or combine multiple standard models to complete the 3D model of the desired shape Then, the data is once written in the second storage means 32 of FIG. 1 as a data file divided into the basic cross section data, the control data for extruding and rotating the data and the pipe connection position data in the predetermined data format.

The output data converter 5 shown in FIG. 1 converts the data of the three-dimensional model of a predetermined data format stored in the second storage means 32 into data of an intermediate format and sends it out. a data conversion unit 41, a heterologous (e.g., companies) and heterologous 3D CAD data conversion means 42 for feeding converted into a data format corresponding to the three-dimensional CAD system, CG data conversion to feed is converted into a data format for computer graphics Means 43 are provided.

In FIG. 3, the intermediate formats for representing different types of CAD data in a common format include IGES, STEP, DXF, DESIGNBASE,
STL, COSMOS, there is CATIA, etc., they are points, lines, and configuration information of the information and the surface of the surface, described in a common format text file, specific attribute data is deleted. When enumerating specific information to be described, "point"
"Line", "arc", "curve", "curve ridge", "plane", "quadratic surface", "free-form surface", "trim surface", "plane boundary", "surface boundary", "solid", "ridge", "attribute data", etc. It is. The unique attribute data which is not particularly required for the piping design system and is deleted includes front and back surfaces, color, light reflectance, light transmittance, light diffusion rate, solid information, etc., of the surface information.

[0029]

[Piping design method] As shown in FIG.
1, various components such as an engine 52, a generator 53, and a tank 54 are arranged, and a cooling water pipe 55 and the like are piped so as to connect between the cooling water connection ports 57 and 58 of each component. Explaining the three-dimensional model creation of the parts 52, 53, 54, etc., the company's three-dimensional CA for the piping system is used.
Instead of using the D system, a mechanism model is created in the in-house 3D CAD system for the piping system by using the 3D model creation tool according to the present invention and using the 3D model of those parts. Hereinafter, the procedure will be briefly described.

The engine 52 shown in FIG. 4 has only handwritten design drawings, the tank 54 has only three-dimensional CAD data of a format created by another company's three-dimensional CAD, and the generator 53 has another company or its own. Two-dimensional CA
It assumes that only two-dimensional CAD data created in D is present.

Based on the handwritten design drawing, the engine 52
In the case of creating the three-dimensional model of FIG. 1, a handwritten design drawing (two-dimensional drawing) of the engine 52 is input by the image input device 10 and converted into image data by the image data conversion means 20 in FIG. displayed on the display 16 and inputs to, and the line arrangement of necessary portion sets the dimensions on the plane coordinates, create a plane figure by the text data format, extrusion, rotation or cutting and pasting processing operation 3 Create a dimensional model,
A three-dimensional model is created by correcting the shape and the like, and is written into the second storage means 32 once in the predetermined data format, divided into basic cross-section data and control data for extruding or rotating the basic cross-section data. Of course, the output data-to-conversion device 5 is directly written in a predetermined data format without writing to the second storage means 32.
You can also send to and output.

In order to create a three-dimensional model of the tank 54 created by two-dimensional CAD, two-dimensional CAD data is input via the disk drive device 11 or the input cable 12 in FIG. Converted to the intermediate format by means 21
Input to PU2, select a line segment, create a plane figure on plane coordinates, create a 3D model by extrusion, rotation, cut and paste, etc., correct the shape etc. to complete the 3D model, According to the predetermined data format, basic sectional data and the control data are once written in the second storage means 32 once.

The tank was created by other companies of the three-dimensional CAD 54
When a three-dimensional model is created, the three-dimensional CAD
The data is input, and the data is converted into the intermediate format by the intermediate format
U2, add a necessary part or delete an unnecessary part, correct the shape, etc., and separate the basic cross-sectional data and the control data according to the predetermined data format.
Is temporarily written to the storage means 32.

In each of the three-dimensional model creation stages described above, if the external shape necessary for the piping, the position and size of the cooling water connection port, etc. are accurately created, a fine shape or a concave shape unrelated to the piping can be obtained. Can be omitted to increase the efficiency of the creation work.

In addition to the above-described three-dimensional model creation process, the standard model or arbitrary creation model written in the standard model storage means 33a or the arbitrary model storage means 33b of the third storage means 33 in FIG. It is also possible to create a three-dimensional model of a simple part or a similar part in a predetermined data format by using the above data, and to create a new three-dimensional model by combining a plurality of created three-dimensional models. Can also.

The data of the three-dimensional model of each part created by the three-dimensional model creation tool as described above is sent through the output data converter 5 or directly to the three-dimensional CAD for the piping design system.

For example, when a mechanism model is created by a company's three-dimensional CAD using a predetermined data format, data of the three-dimensional model created in the predetermined data format is directly sent out.

In the case of designing a mechanism by using different kinds of three-dimensional CAD, in FIG. 1, the different kind of three-dimensional CAD data conversion means 42 converts the data into data corresponding to the above-mentioned different kind of three-dimensional CAD and sends it out. Alternatively, the data is converted into the intermediate format data by the intermediate format data conversion means 41 and sent out, and the conversion means built in the heterogeneous three-dimensional CAD system is used to convert the intermediate format data into a format corresponding to the heterogeneous three-dimensional CAD. Convert to data.

The three-dimensional model of each part is read
In the dimensional CAD, for example, as shown in FIG.
3, 54, etc. are set at predetermined positions, the position of each connection port is determined using the pipe connection position data, or the shape and size of the connection part, and one of the cooling water connection ports 57 is connected to the connection port of the other side. The piping is designed so as not to buffer other components 53 up to 58 and to reach them at a short distance.

When used for computer graphics, the data is converted into CG data (for example, VRML format) by the CG data conversion means 43 in FIG. 1 and output.

[0041]

[Other Embodiment of Present Invention] (1) In addition to the pipe to the engine room of a ship, can be used for piping and various piping design in buildings.

(2) As an application of the present invention, when it is desired to use the dimensions or the shape slightly changed at the time of piping design, each data of the three-dimensional model, for example, the dimensions of the basic cross-section data and the extrusion amount in the control data, etc. By setting a plurality of selectable parameters and selecting a required dimension or extrusion amount at the time of piping design, a three-dimensional model of a desired shape or dimension can be used without operating a three-dimensional creation tool. Is also possible.

(3) A data file as shown in FIG.
Besides such base section data and control data of a three-dimensional model by shape and color, the name of the part (e.g. bolts, nuts, etc.) code or piping designed unrelated specifications for and Compendium of (e.g. at the pump if (For example, the number of revolutions or the head).

[0044]

As described above, the inventions of claims 1, 2 and 4 of the present application have a three-dimensional model creation tool separate from the three-dimensional CAD system for the piping design system, and each component used in the piping design system. As data, two-dimensional drawings such as design drawings, handwritten drawings or catalogs, two-dimensional CA
2D shape data created in D or heterogeneous 3D CA
Since the three-dimensional shape data and the like created in D are taken in, a three-dimensional model in a predetermined data format is created from the data, sent to a three-dimensional CAD system for a piping design system, and used for creating a mechanism model. , Expensive 3D C to create a 3D model of each part for piping design
There is no need to use an AD system, so that design costs and investment costs can be reduced, the man-hours for model creation can be reduced, and work efficiency for creating a three-dimensional model and a piping mechanism model can be improved. In addition, coordination design with different types of CAD can be easily performed.

In particular, a two-dimensional drawing such as a hand-drawn design drawing or a catalog can be input through an image data converting means to create a three-dimensional model in a predetermined data format. , 3 based on handwritten drawings, etc.
Compared to the case where a three-dimensional model is created from the first step such as shape measurement using dimensional CAD, the design cost and work efficiency are greatly improved.

(2) By reducing the man-hours for creating a model, for example, in a comprehensive CAD system that performs from product planning to sales using three-dimensional CAD data as shown in FIG. 7, the cycle from design to manufacturing is shortened. In addition, the time required for quality improvement can be reduced.

(3) As in the third aspect of the present invention, a plurality of standard models of a basic three-dimensional shape such as a cylinder or a rectangular parallelepiped are stored in advance, and a arbitrarily created three-dimensional model or two-dimensional sectional shape is arbitrarily created. By selecting one or a plurality of three-dimensional models from the standard model or the arbitrary creation model, determining their dimensions, position and orientation, and arranging them, a predetermined data format is created in the creation tool. When a three-dimensional model can be created, a three-dimensional model of a simple part required for piping design can be easily created from the beginning in the tool. Further, it is also possible to create a simple three-dimensional model representing only the minimum irregularities required for piping design and the shape of the piping connection port.

(4) 3D that is separate from the 3D CAD system
The dimension creation tool, two-dimensional drawing such as a handwritten drawings or catalog, based on a two-dimensional CAD or different three-dimensional CAD data, so to create a three-dimensional model of a predetermined data format, in piping design, labor reduction, as described above In addition, the improvement in work efficiency contributes to effective use of space and optimal route design, leading to improvement in design quality and reduction in engine room volume.

(5) When the three-dimensional model in the predetermined data format is divided into the basic section data and the control data for extruding or rotating the three-dimensional model, the data storage can be reduced. together becomes, it is possible to improve the efficiency of the three-dimensional modeling, easily advance the piping design.

(6) As described in claims 6 to 8,
Output data conversion means for converting the created three-dimensional model into data in an intermediate format, output data conversion means for converting the created three-dimensional model into a data format specific to the three-dimensional CAD system of the destination, or If the output data conversion means for converting the three-dimensional model into a computer graphic data format is provided, the created three-dimensional model can be used immediately for various three-dimensional CAD or computer graphics, and a heterogeneous three-dimensional CAD or the like can be used. The range of cooperation with is further expanded.

(7) If the three-dimensional model in the predetermined data format also includes pipe connection position data as in the ninth aspect of the present invention, for example, a three-dimensional model having the same cross-sectional shape but different length is required. In such a case, a three-dimensional model of the predetermined format data can be created using the basic cross-section data already stored, and the three-dimensional model can be efficiently created. That is, it is possible to eliminate the waste of the work of creating and storing the three-dimensional model again from the beginning and the waste of the model storage area. Cross-section system like

[Brief description of the drawings]

FIG. 1 is a block diagram of a three-dimensional model creation tool to which the present invention is applied.

FIG. 2 is a diagram showing a flow of a three-dimensional model creation flow by a three-dimensional creation tool of the present invention and a flow of three-dimensional CAD for a piping design system.

FIG. 3 is a diagram showing the contents of intermediate format data.

FIG. 4 is a perspective view showing an example of an engine room piping.

FIG. 5 is a diagram showing a data file created and stored as a three-dimensional model.

FIG. 6 is a diagram for explaining a conventional problem.

FIG. 7 is a diagram for explaining another conventional problem.

FIG. 8 is a diagram showing a flow of the piping design system.

[Explanation of symbols]

2 Central control unit (CPU) 3 Storage unit 4 Input data conversion unit 5 Output data conversion unit 20 Image data conversion unit for input 21 Intermediate format data conversion unit for input 33a Standard model storage unit 33b Arbitrarily created model storage unit 35 3D model creation program for image data 36 3D model creation program for 2D CAD data 37 3D model creation program for 3D CAD data 38 3D model creation program for standard model 41 Intermediate format for output Data conversion means 42 Different-type three-dimensional CAD data conversion means for output 43 CG data conversion means for output 52 Engine (one example of parts) 53 Generator (one example of parts) 54 Tank (one example of parts) 55 Cooling water pipe (of piping) One case)

Claims (9)

[Claims] 1. An image data conversion means for converting the shape of a part drawn on a two-dimensional drawing into image data and taking in the image data, and forming a plane figure in a tool along the shape of the taken image data, A three-dimensional model creation tool for a piping design system, comprising: a three-dimensional model creation means for image data for creating a three-dimensional model in a predetermined data format by extruding, rotating or cutting and pasting a figure. . 2. An intermediate format data conversion means for inputting, which converts two-dimensional shape data created by two-dimensional CAD into data in an intermediate format and takes in the data. Create a three-dimensional model in a predetermined data format by creating a plane figure, extruding the plane figure, rotating or cutting and pasting 2
3. The three-dimensional model creation tool for a piping design system according to claim 1, further comprising a three-dimensional model creation means for two-dimensional CAD data. 3. A standard model storage means for storing a plurality of standard models of a basic three-dimensional shape, an arbitrary creation model storage means for storing an arbitrary created three-dimensional model or a two-dimensional cross-sectional shape, select one or more of the standard model or any 3D model or 2D cross-sectional shape created extrusion or rotation to the three-dimensional model created from any created model storage means, their dimensions, the position and orientation 3. A three-dimensional model creation device for a piping design system according to claim 1, further comprising: a three-dimensional model creation device for a standard model that creates a three-dimensional model in a predetermined data format by determining and arranging the three-dimensional model. tool. 4. An intermediate format data conversion means for inputting, which converts three-dimensional shape data created by three-dimensional CAD into three-dimensional shape data in an intermediate format, and inputs the converted three-dimensional shape data. 3. A three-dimensional model creation device for a piping design system according to claim 1, further comprising a three-dimensional model creation means for three-dimensional CAD data for creating a three-dimensional model in a predetermined data format by adding and deleting. tool. 5. The three-dimensional model for a piping design system according to claim 1, wherein the three-dimensional model is created and stored by dividing at least basic sectional data and control data for extruding or rotating the basic sectional data. tool. 6. The piping design system according to claim 1, further comprising an intermediate format data conversion unit for converting the created three-dimensional model of a predetermined data format into data of an intermediate format. A dimensional model creation tool. 7. The piping according to claim 1, further comprising a heterogeneous three-dimensional CAD data conversion means for converting the created three-dimensional model of a predetermined data format into a unique data format of a heterogeneous three-dimensional CAD system to be used. 3D model creation tool for design system. 8. A C for converting the created three-dimensional model having a predetermined data format into a computer graphic data format.
The three-dimensional model creation tool for a piping design system according to claim 1, further comprising a G data conversion unit. 9. The three-dimensional model for a piping design system according to claim 5, wherein the created three-dimensional model includes piping connection position data of equipment necessary for piping design. Model creation tool.