JP4980966B2 - CAD data conversion system and CAD data conversion method - Google Patents

Description

  The present invention relates to a CAD data conversion system that converts data so that data can be used among a plurality of types of CAD.

Conventionally, various CAD data conversion systems that perform data conversion so that data can be used among a plurality of types of CAD have been developed. For example, in a CAD data conversion system, data described in a CAD-specific format is converted to data in another CAD-specific format so that data can be used between CADs.
One of the most commonly used formats is the dxf format so that the CAD data can be used between each other. However, in the division that all CAD data can be used in the data converted in the dxf format. There is no actual situation.

Regardless of the dxf format, after CAD data conversion, data cannot be used between CADs. When converted data is used, characters and dimension lines are often not displayed correctly.
In view of this, a technology has been developed that enables characters and dimension lines to be displayed correctly even after data conversion in a CAD data conversion system (for example, Patent Document 1).
In this Patent Document 1, in order to exchange drawing data including a plurality of auxiliary lines and a dimension line consisting of a plurality of auxiliary lines and a narrowly-defined dimension line indicating the length between the auxiliary lines, a plurality of CAD devices of different types are used. In a drawing data exchange method between different types of models that converts file format data into CAD data, a dimension line correction unit that corrects an error that occurs when converting dimension lines is provided.
JP-A-6-119408

In the CAD data conversion system of Patent Document 1, the CAD drawing can be displayed by correcting the deviation of the dimension line in the reading after the CAD data conversion, but the conversion format of characters or the like is converted in the reading-side CAD. If the data is not compatible with this data, garbled characters are generated, and the garbled characters cannot be corrected.
Therefore, in view of the above problems, the present invention provides a CAD data conversion system and CAD data that can be surely displayed correctly in another CAD even if auxiliary data corresponding to dimensions, characters, etc. created by one CAD is read. An object is to provide a conversion method.

In order to achieve the above object, the present invention takes the following technical means.
That is, the technical means for solving the problems in the present invention is a CAD data conversion system that converts data so that data can be used among a plurality of types of CAD. , Data dividing means for dividing the shape data into auxiliary data different from the shape data, and converting the shape data into first data in CAD format, and converting the auxiliary data into second data in print format. First data converting means for converting, second data in the print format, second data converting means for converting to CAD format, second data in the CAD format, and first data converted by the first data converting means. There is a data synthesizing means for synthesizing one data.

It is preferable that the first data conversion means is configured to add reference data that becomes a reference point at the time of synthesis to the second data at the time of conversion.
The first data converting means preferably converts the auxiliary data into the second data in the HP-GL format, which is one of the formats for printing, when converting the auxiliary data into the second data.
When the second data conversion means converts the second data in the print format into the CAD format, the data in the second data having the same attribute may be blocked and converted into the CAD format. preferable.

Another technical means of the present invention is a CAD data conversion method for converting data so that data can be used among a plurality of types of CAD using a computer, wherein the computer The step of dividing the CAD original data into shape data and auxiliary data different from the shape data, the step of converting the shape data into first data in CAD format, and the auxiliary data in a format for printing. and converting the second data, the second data format for the print after conversion into CAD format lies in executing the steps of combining the with the second data of the first data.
When the computer converts the auxiliary data into the second data in the print format, it is preferable to add reference data to be a reference point at the time of composition to the second data. In addition, when the computer converts the auxiliary data into the second data, the computer preferably converts the auxiliary data into the second data in the HP-GL format, which is one of the formats for printing.

When the computer converts the second data in the print format into the CAD format, it is preferable that the data in the second data having the same attribute is blocked and converted into the CAD format. .

  According to the present invention, even if auxiliary data corresponding to dimensions, characters and the like created with one CAD is read, it can be displayed correctly with another CAD.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a CAD data conversion system 1 converts CAD data (hereinafter, sometimes referred to as CAD data) so that data can be used between a plurality of types of CAD. The software 2 is installed in the computer 2.
The computer 2 of the CAD data conversion system 1 includes a control unit 3 and a storage unit 4.

An input device such as a keyboard and a mouse is connected to the computer 2 and a display device (for example, a monitor) for displaying a drawing on the CAD is connected.
The storage unit 4 is composed of a non-volatile memory such as a hard disk, a CD, a DVD, etc., and stores CAD software and CAD data stored in a format corresponding to the CAD before conversion. Yes. That is, as shown in FIGS. 1 and 2, the CAD file 9 stored in the storage unit 4 stores the original data of the CAD data before the conversion and the CAD data after the conversion.

The control unit 3 performs various processes of an input device, a display device, and software, and includes a data dividing unit 5, a first data converting unit 6, a second data converting unit 7, and a data synthesizing unit 8. It has.
As shown in FIG. 2, the data dividing means 5 divides the original data of the CAD data stored in the CAD file 9 into shape data and auxiliary data different from the shape data when converting the CAD data. Is. Specifically, if the first drawing A in FIG. 3A is obtained by displaying the original data of the CAD data, the data dividing means 5 converts the CAD data as shown in FIGS. 2 and 3B. Sometimes, the shape data corresponding to the shape 10 such as a straight line, a circle, or a curve, and the auxiliary data corresponding to the auxiliary body 11 provided as an auxiliary such as a dimension line, a character (for example, a symbol, a note), an alphanumeric character, etc. Divide.

As shown in FIG. 2, the first data converting means 6 converts the shape data divided by the data dividing means 5 into a CAD format (for example, “cad” for K-CAD, “ dwg ") is converted to first data in another CAD format (for example, dxf). In the first data conversion means 6, after the shape data is converted into another CAD format different from the CAD format of the shape data stored in advance, the shape data is temporarily stored in the shape data file 16 stored in the storage unit 4. The first data after conversion is stored.
The first data conversion unit 6 converts the auxiliary data divided by the data division unit 5 into second data in a print format (hereinafter sometimes referred to as a print format) different from the CAD format. The format for printing is described in a control language for printing, and is a page description language represented by PostScript, or a plotter such as HP-GL, GP-GL, HM-GL, D-SCAN, CDCL. It is a description language.

In this embodiment, the first data conversion means 6 is one of the print formats after adding the reference data used at the time of composition to the auxiliary data when converting the auxiliary data into the second data of the print format. The data is converted into the second data in the HP-GL format.
Specifically, as shown in FIG. 3C, the first data conversion means 6 adds a reference point P to the second drawing B representing the divided auxiliary data, and the position of the reference point P. (Coordinates) is obtained, and the position and coordinates are used as reference data. The first data conversion unit 6 adds the reference data regarding the reference point P to the auxiliary data, and then converts the auxiliary data to which the reference data is added into a print format.

The reference point P is preferably one that can indicate the range of the drawing. For example, two reference points P1 and P2 are given to the diagonal lines at both ends of the drawing area 12 of the second drawing B, respectively, and the reference data of the positions (coordinates) at the two reference points P1 and P2 are used as auxiliary data. It is preferable to add. In such a case, as a matter of course, the size and position of the drawing area 12 of the second drawing B after division and the first drawing A which is the original drawing are the same.
As shown in FIG. 2, the second data converting means 7 converts the second data in the print format into the CAD format. Specifically, the first data converting means 6 once converts the CAD format into the print format. The auxiliary data (second data) is converted from a print format to a CAD format (dxf, dwg, etc.) by the second data conversion means 7. After the second data conversion means 7 converts the auxiliary data in the print format into the second data in the CAD format, the converted second data is temporarily stored in the auxiliary data file 17 stored in the storage unit 4. It has come to be.

  When the auxiliary data (second data) is converted from the print format to the CAD format by the second data converting unit 7, the second data converting unit 7 stores the second data in the second data before conversion (before conversion to the CAD format). The data having the same attribute is converted into a CAD format after being blocked. For example, if there are a plurality of dimension lines in the second data before conversion to CAD format (second drawing B) and there are a plurality of characters different from the dimension lines, the second data conversion means 7 The second data before conversion is divided for each attribute of the dimension line group and the character group. Then, the second data conversion unit 7 recognizes the group of divided dimension lines as one block (block) and recognizes the group of divided characters as one block (block). The second data is converted from the print format to the CAD format.

The data synthesizing unit 8 synthesizes the second data converted by the second data converting unit 7 and the first data converted by the first data converting unit 6. The data synthesizing unit 8 reads the combined data and displays the drawing so that the second data and the second data are displayed so that the drawing is in the same state as the original first drawing A before conversion. One data is synthesized.
As shown in FIG. 4, the third drawing C displays the first data stored in the shape data file 16, and the second drawing B displays the second data stored in the auxiliary data file 17. To do. The data synthesizing unit 8 includes reference points P1 and P2 in the second drawing B determined when the data is converted by the first data conversion unit 6, and corresponding points N1 and N2 in the third drawing C corresponding to the reference points P1 and P2. The second drawing B or the third drawing C is reduced or enlarged so that the second drawing B or the third drawing C matches with each other. Then, the data synthesizing means 8 has the coordinate system of the first data and the second data in the state where the second drawing B and the third drawing C match (the reference points P1, P2 match the corresponding points N1, N2). By correcting and combining, the data of both is combined. After combining the first data and the second data, the converted CAD data is stored in the CAD file.

Next, the CAD data conversion method of the present invention will be described with reference to FIG. 5 and FIG. 6 together with the data conversion operation in the CAD data conversion system 1.
In this description, for convenience of description, the original data of CAD data includes shape data corresponding to the vending machine 13 shown in FIG. 5A, a dimension line 14, a numerical value “1800”, a symbol “mm”, a note, It is assumed that auxiliary data corresponding to “Material SPCC” is stored. In the following description, the symbol “mm” and the note “material SPCC” may be collectively referred to as characters. The CAD extension of the original data is “cad”, and this “cad” is converted to the extension “dxf” of another CAD.

  As shown in FIG. 5B, first, in order to convert the data, the original CAD data is transferred to the vending machine 13 by the data dividing means 5 using the conversion function provided in the CAD software. The data is divided into corresponding shape data and auxiliary data corresponding to the dimension line 14, the numerical value “1800”, the symbol “mm”, and the note “material SPCC” (S1 in FIG. 6). At this time, the third drawing C of the shape data corresponding to the vending machine 13 and the second drawing B of the auxiliary data corresponding to the dimension line 14, the numerical value “1800”, the symbol “mm”, and the note “material SPCC”. The size of both drawing ranges is the same, and the aspect ratio of the drawing ranges is the same.

The first data converting means 6 converts the shape data corresponding to the vending machine 13 into another CAD format (extension “dxf”), and converts the converted shape data (first data) into the shape data file 16. Store (S2 in FIG. 6).
As shown in FIG. 5C, the first data conversion means 6 obtains the drawing area 12 from the second drawing B corresponding to the auxiliary data, for example, and the left and right two points on the boundary line of the drawing area 12 Are extracted, and the extracted points are set as reference points P1 and P2, and the reference data indicating the positions of the reference points P1 and P2 is added to the auxiliary data (S3 in FIG. 6). The reference points P1 and P2 may not be on the boundary line of the drawing area 12 of the second drawing B or the first drawing A, for example, two points common to the third drawing C (for example, the origin and other points) Point) may be arbitrarily extracted, or a point or circle may be plotted on the coordinates of the second drawing B or the first drawing A common to the third drawing C, and the point or circle may be used as the reference point P. .

  After the reference data is added to the auxiliary data, the auxiliary data including the dimension line 14, the numerical value “1800”, the symbol “mm”, the note “material SPCC”, and the reference points P 1 and P 2 are printed by the first data conversion unit 6. It converts into the 2nd data of a format (HP-GL format) (S4 of FIG. 6). In the state where the dimension line 14, the numerical value “1800”, the symbol “mm”, the note “material SPCC”, and the reference points P1 and P2 are converted into the second data in the HP-GL format, the dimension line 14 and the numerical value “1800”. The symbol “mm”, the note “material SPCC”, and the reference points P1 and P2 have a printing format (data format) that does not belong to CAD.

The second data (auxiliary data) in a print format that does not belong to CAD is converted into “dxf”, which is the extension of another CAD to be converted, by the second conversion means 7 (S5 in FIG. 6). When converting, if there are a plurality of dimension lines 14, a plurality of numerical values, and a plurality of symbols on the second drawing B before conversion, the second conversion means 7 converts the second data into each attribute, that is, the dimension. Each line 11 is grouped into a line, a numerical value, a symbol, and a note, and each auxiliary body 11 of the grouped attribute is converted into another CAD format so that it becomes one block.
When the second data in the print format is converted into a CAD extension and then the second data is read by CAD, before conversion, the dimension line 14, the numerical value “1800”, the symbol “mm”, the note on the CAD What was recognized as “material SPCC” is not a dimension line 14, a character “1800”, a symbol “mm”, and a character “note material SPCC”, but a dimension line 14, a numerical value “1800”, a symbol “mm” And the note “Material SPCC” will also be recognized as a collection of lines and curves. Since these dimension lines 14, numerical values, symbols, and notes are respectively made into blocks, if there are multiple dimension lines 14, multiple numerical values, and multiple symbols, data is read in another CAD Later, you can delete only dimension line 14 (dimension line group), delete only numeric value (number group), delete only symbol (group of symbols),
Only the note “Material SPCC” (note group) can be deleted.

In the above description, regarding the dimension, the dimension number “1800” and the symbol “mm” are separated from the dimension line 14, and then the dimension line 14, the numeral “1800” and the symbol “mm” are separated. Are separately grouped (blocked), but the dimension line 14 related to the dimension, the symbol “mm”, and the numerical value “1800” are considered as one related to the dimension (attribute of the dimension) as one lump. You may make it block and can delete these collectively.
Further, as shown in FIG. 5C, the symbols and notes are characters in a broad sense, and there are characters (symbols) related to dimensions and characters (notes) not related to dimensions on the drawing. However, as described above, the character relating to the dimension is regarded as the same attribute as the dimension line 14, separated from the character (note) not related to the dimension, and separately grouped by the second conversion unit 7, thereby the character relating to the dimension. (Symbol) can be deleted together with the dimension line 14, and characters (notes) not related to dimensions may be deleted separately from characters (symbols) related to dimensions.

After the second data conversion means 7 converts the second data (auxiliary data) in a print format that does not belong to CAD into “dxf”, which is the extension of another CAD to be converted, the auxiliary data file 17 The auxiliary data (second data) after conversion is stored (S6 in FIG. 6).
As shown in FIG. 5D, the shape data is generated by the data synthesizing unit 8 so that the third drawing C by the shape data and the second drawing B by the auxiliary data coincide with each other using the reference data of the reference point P. The first data stored in the file 16 and the second data stored in the auxiliary data file 17 are combined (S7 in FIG. 6).

When the data synthesizing unit 8 completes the synthesis of the shape data (first data) and the auxiliary data (second data), the synthesized data is stored in the CAD file of the storage unit 4 as converted CAD data.
As shown in FIG. 5E, when the synthesized data is read by another CAD, the vending machine 13, the dimension line 14 and the numerical value “1800” are located at the same position in the CAD as in FIG. 5A. Can be displayed. For the vending machine 13 corresponding to the shape data, the size can be changed by operating the figure on the CAD.

  As described above, according to the present invention, CAD original data is divided into shape data and auxiliary data different from the shape data, and the shape data is converted into the first data in the CAD format, and the auxiliary data is used for printing. Since the second data and the first data are synthesized after the second data in the format is converted into the CAD format and the second data in the print format is converted into the CAD format, Even if the CAD data after conversion is read by another CAD, the dimension lines 14 and characters that are likely to cause misalignment and garbled characters are correctly displayed in the same state as the drawing before conversion without causing misalignment or garbled characters. Can be displayed. Due to the compatibility of CADs between CADs, misalignment of dimensional lines 14, characters and alphanumeric characters, garbled characters, and changes in character fonts often occur, but this can be reliably eliminated. .

In particular, in the conventional CAD data conversion system and CAD data conversion method, when a large amount of CAD data is read by a CAD having a different format, the shape 10 such as a line or circle is displayed correctly, but some characters are displayed. There was a risk of misalignment and garbled characters such as alphanumeric characters, so it took time to inspect drawings, but the present invention reliably prevents misalignment and garbled characters. Therefore, the inspection time can be greatly reduced.
According to the present invention, when the auxiliary data is converted into the second data in the print format, the reference data to be the reference point P at the time of synthesis is added to the second data. The synthesis with the second data can be performed quickly and reliably.

When the auxiliary data is converted into the second data, the auxiliary data is converted into the second data in the HP-GL format, which is one of the printing formats, so the CAD format data is very simple. It can be converted to data close to the print image.
In addition, when the second data in the print format is converted into the CAD format, data having the same attribute among the data in the second data is blocked and converted into the CAD format. If there are a plurality of dimension lines in the drawing after data conversion, the plurality of dimension lines can be deleted at once, and other operations (movement, copying, rotation, etc.) regarding the dimension lines can be performed. In particular, when there are objects with different attributes (for example, dimension lines, numerical values, characters) on the drawing, independent operations can be performed for each attribute on the drawing after CAD data conversion, and one with one attribute. The operations such as deletion, movement, copying, rotation, and change can be performed by one operation.

It is a block diagram of a CAD data conversion system. It is the figure which showed the procedure of CAD data conversion. It is explanatory drawing explaining the original drawing before conversion. It is explanatory drawing explaining the synthesis | combination of 1st data and 2nd data. It is the figure which showed the procedure of the data to convert as a screen display of CAD. It is the flowchart which showed the CAD data conversion method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Data conversion system 2 Computer 3 Control part 4 Memory | storage part 5 Data division | segmentation means 6 1st data conversion means 7 2nd data conversion means 8 Data composition means 10 Shape 11 Auxiliary body 12 Drawing area 13 Vending machine 14 Dimension line 16 Shape data File 17 Auxiliary data file

Claims (8)

In a CAD data conversion system that converts data so that data can be used between multiple types of CAD,
Data dividing means for dividing the CAD original data into shape data and auxiliary data different from the shape data;
First data conversion means for converting the shape data into first data in CAD format and converting the auxiliary data into second data in print format;
Second data conversion means for converting the second data in the print format into a CAD format;
A CAD data conversion system comprising: data combining means for combining the second data in the CAD format and the first data converted by the first data conversion means.   2. The CAD data conversion system according to claim 1, wherein the first data conversion unit is configured to add reference data to be a reference point at the time of synthesis to the second data at the time of conversion.   The first data conversion means converts the auxiliary data into second data in the HP-GL format, which is one of print formats, when converting the auxiliary data into the second data. The CAD data conversion system according to claim 1 or 2.   When converting the second data in the print format into the CAD format, the second data conversion means converts the data in the second data having the same attribute into blocks and converts the data into the CAD format. The CAD data conversion system according to any one of claims 1 to 3. A CAD data conversion method for converting data so that data can be used between a plurality of types of CAD using a computer ,
The computer
Dividing the CAD original data into shape data and auxiliary data different from the shape data ;
Converting the shape data into first data in CAD format ;
Converting the auxiliary data into second data in a print format ;
Synthesizing the second data and the first data after converting the second data in the print format into the CAD format ;
The CAD data conversion method characterized by performing these . 6. The computer according to claim 5, wherein when the auxiliary data is converted into the second data in a print format, the computer adds reference data as a reference point at the time of composition to the second data. CAD data conversion method. The computer, when converting the auxiliary data into second data, converts the auxiliary data into HP-GL format second data, which is one of print formats. 5. The CAD data conversion method according to 5 or 6. When the computer converts the second data in the print format into the CAD format, the computer converts the data in the second data having the same attribute into blocks and converts the data into the CAD format. The CAD data conversion method according to claim 5.

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