JPS63147267A - Automatic dimension entry system for 2-dimensional pattern - Google Patents

Abstract

PURPOSE:To produce a 2-dimensional pattern easy to see with high efficiency by selecting the dimensional accuracy based on the attribute information taken out of the 2-dimensional pattern information for production of the dimension entry data. CONSTITUTION:A pattern form information extracting means 11 extracts the attribute information out of the 2-dimensional pattern information and selects the pattern form information on each pattern element to which the dimensions are written based on said attribute information. Then a dimension entry data production means 12 selects the dimensional accuracy information on the pattern elements in response to the attribute of the pattern element extracted by the means 11 and to undergo entry of dimensions. Then the dimension entry data on each pattern element to which the dimensions are written based on the pattern form information extracted by the means 11 as well as said dimensional accuracy information. A pattern production means 13 produces a 2-dimensional pattern containing its dimensions based on the dimension entry data produced by the means 12. In such a way, a 2-dimensional pattern easy to see is obtained with high efficiency.

Description

[Detailed description of the invention] [Summary] In an automatic dimensioning method for two-dimensional figures, figure shape information and attribute information are used as input information, a figure element to be dimensioned is extracted based on the attribute information, and a dimension corresponding to the attribute is extracted. Select dimensional accuracy and create dimension entry data. Thereby, the dimension accuracy can be selected in accordance with the attributes of the graphic element to be dimensioned, and dimensions of a two-dimensional figure can be efficiently dimensioned.

[Industrial application field]

The present invention is an automatic dimensioning method for two-dimensional figures, and in particular, an improved automatic dimensioning method for two-dimensional figures that selects the number of effective digits of the dimension to be written in accordance with the attributes of the graphical element and is capable of entering necessary tolerances. Regarding the method.

[Conventional technology]

In order to efficiently create two-dimensional figures, CAD (Com
This is done automatically using putter-aided design.

In the field of creating two-dimensional figures using CAD, when writing dimensions for a figure, one by one write the desired figure elements such as line segments and arcs, and the position of the leader line for writing the dimensions. The operator was giving instructions. Furthermore, when entering dimension values, the operator inputs instructions regarding dimensional accuracy such as the number of effective digits and tolerances.

However, in fields such as mechanism design that require many similar drawings, this manual method requires a lot of operation time and time dedicated to CAD terminals, so it is not effective in shortening the design period and reducing the number of man-hours required to create two-dimensional figures. There was an inconvenience in that it was not possible to move forward.

Therefore, CAD systems have come to automatically enter the dimensions of two-dimensional figures.

FIG. 6 shows a parts diagram of a punch plate as an example of a large-sized two-dimensional figure automatically created by such CAD. As can be seen from this Figure 6,
The automatic dimension writing method for two-dimensional figures using conventional CAD systems has the following characteristics.

(a) The position of dimension entry and the number of significant digits of the dimension entry are fixed. For example, in the case of Figure 6, each dimension is entered in the form of a leader line in the X direction and Y direction from point P as the reference point, and the number of significant digits of each entered dimension is determined by the attribute of the graphic element. Three digits (the number of digits after the decimal point, the same applies hereafter) are entered for each rate, regardless of the number. If the precision is 2 digits, 2 digits below the decimal point will be entered regardless of the attributes of the graphic element. Note that the attribute information is information representing attributes of constituent elements of a two-dimensional figure such as a figure element, for example, the meaning that a figure element has in an actual part or product.

(bl Tolerance is not entered.

(C) Since two-dimensional graphical emotion is only graphical shape information,
All coordinate points that do not require dimensioning are dimensioned.

[Problem that the invention seeks to solve]

As mentioned above, the conventional automatic dimensioning method for two-dimensional figures is
The accuracy of the entered dimensions is fixed. For this reason, in two-dimensional figures, although the dimensional accuracy generally varies depending on the attributes of the graphic elements, there is a problem in that it is not possible to deal with this.

In addition, there are many dimensions that require special tolerances to be entered, but with conventional methods, tolerances cannot be automatically entered, so operators had to instruct them to input them individually when necessary. .

Furthermore, in the conventional method, dimensions were written uniformly at all the coordinate points of graphic elements, so it is necessary to deal with the fact that some graphic elements may or may not require dimensioning depending on their attributes. Because of the large number of dimensions and leader lines, processing efficiency deteriorates and drawings become difficult to read.

The present invention adds attribute information in addition to figure shape information to two-dimensional figure information, extracts a figure element to be dimensioned based on the attribute information, and selects the accuracy of the entered dimension according to the attribute of the figure element. It is an object of the present invention to provide an improved automatic dimension entry method for two-dimensional figures so that necessary tolerances can be entered.

[Means for solving problems]

The solution taken by the present invention will be explained with reference to FIG. FIG. 1 is a block diagram showing the basic configuration of the present invention.

In FIG. 1, reference numeral 11 denotes a figure shape information extracting means, which extracts figure shape information of each figure element to be dimensioned from the two-dimensional figure information based on the attribute information in the two-dimensional figure information. .

12 is a dimensioning data creation means that selects the dimensional accuracy of the graphical element corresponding to the attribute of the graphical element to be dimensioned, and based on this dimensional accuracy information and graphic shape information, each dimensioning target to be dimensioned. Create dimensioning data for graphic elements.

The dimensional accuracy information of the graphic element includes necessary tolerances in addition to the number of effective digits of the entered dimensions. Whether a tolerance is included in the dimensional accuracy information is determined by the attributes of the graphic element.

Reference numeral 13 denotes a figure creation means, which creates a two-dimensional figure whose dimensions are entered in accordance with the dimension accuracy information corresponding to the attributes of each graphic element, based on the dimension entry data created by the dimension entry data creation means 12.

[For production]

The figure shape information extraction means 11 extracts attribute information from the two-dimensional figure information, selects each figure element to be dimensioned based on the attribute information, and extracts the figure shape information from the two-dimensional figure information. Take it out.

The dimensioning data creation means 12 selects the dimensional accuracy information of the graphical element corresponding to the attribute of the graphical element to be dimensioned extracted by the graphical shape information extraction means 12. This selection process can be performed by, for example, providing a table in advance in the dimensional entry data creation means 12 that stores dimensional accuracy information corresponding to the content of each attribute, and referring to the table.

The dimensioning data creation means 12 further creates dimensioning data for each graphical element to be dimensioned based on this dimensional accuracy information and the graphical shape information extracted by the graphical shape information extraction means 11.

The figure creation means 13 creates a two-dimensional figure whose dimensions are filled in according to the dimension accuracy information corresponding to the attribute of each graphic element, based on the dimension entry data created by the dimension entry data creation means 120.

By doing as described above, it is possible to select the precision of the dimensions to be written in accordance with the attributes of each graphic element of the two-dimensional figure, and also to write the necessary tolerances. or,
Since dimensions are entered based on the attribute information of the two-dimensional figure, unnecessary dimension entries are not made, and easy-to-read two-dimensional figures can be created efficiently.

〔Example〕

Embodiments of the present invention will be described with reference to FIGS. 2 to 5. Fig. 2 is an explanatory diagram of the configuration of an embodiment of the present invention, Fig. 3 is a processing flowchart of the embodiment, Fig. 4 is an explanatory diagram of an attribute information table used in the embodiment, and Fig. 5 is an explanatory diagram of the same embodiment. FIG. 2 is an explanatory diagram of an example of a two-dimensional figure created according to an example.

(A) Structure of the embodiment In FIG. 2, the figure shape information extraction means 11, the dimension entry data creation means 12, and the figure creation means 13 are as follows.
This is as explained in FIG.

A graphic information storage device 14 stores two-dimensional graphic information, that is, graphic shape information and attribute information of two-dimensional figures.

In the figure shape information extraction means 11, 111 is an attribute information extractor that extracts unit attribute information from the two-dimensional figure information, and 112 is a dimensioning object extractor that extracts the attributes of the element to be dimensioned, that is, the figure element. Extract. A graphic shape information extraction unit 113 extracts graphic shape information of a graphic element having the extracted attribute from the two-dimensional graphic information.

In the dimensional data creation means 12, 121 is a dimensional accuracy selection section which selects the dimensional accuracy of the dimension of a graphic element to be dimensioned by referring to a dimensional accuracy table 121a provided therein.

FIG. 4 shows an example of the dimensional accuracy table 121a. In the attribute column, attributes (A, B, etc.) of the graphic element are entered, and examples of the contents are shown in parentheses. The dimensional accuracy column is further provided with a number of effective digits column and a tolerance column, in which the number of effective digits and tolerance of the description/large dimension of the graphic element having the corresponding attribute are entered. Note that if no tolerance is entered in the tolerance column, a predefined tolerance corresponding to the number of effective digits will be used.

Reference numeral 122 denotes an axis-parallel line segment extracting unit which extracts line segments parallel to the X-axis or Y-axis from the graphical element to be dimensioned.

Reference numeral 123 denotes a graphic dimension information storage unit which stores end point information (start point and end point) of each extracted line segment and its dimensional accuracy information in a graphic information table 123a provided therein.

124 is an
Extract the end points of each line segment and their dimensional accuracy information, and
The coordinate values are sorted in ascending order (or descending order) and stored in the X coordinate order table 124a.

125 is a Y-coordinate relocation unit, and a figure information table 123a
Extract the endpoints of each line segment and their dimensional accuracy information from Y
The coordinate values are sorted in ascending order (or descending order) and stored in the Y coordinate order table 125a.

126 is a dimensioning data creation unit that creates dimensioning data of the X and Y coordinate values of the graphical element to be dimensioned and stores it in the dimensioning data table 126a.

(B) Operation of the Embodiment The operation shown in FIG. 2 will be explained using the two-dimensional figure creation process shown in FIG. 5 as an example, according to the steps of the processing flowchart shown in FIG. 3.

Figure 5 shows two parts molds as shown in the perspective view of figure (A).
This figure shows a dimensional figure, in which FIG. 3B is a front view and FIG. 1C is a top view.

The dimensional accuracy table shown in FIG. 4 shows an information table of attributes and dimensional accuracy regarding the two-dimensional figure shown in FIG. Attribute A indicates that it is a graphical element that does not require dimensional accuracy (for example, a mold outline or a sunken part), and attribute B indicates that
The attribute C indicates that the graphic element requires high dimensional accuracy (for example, the fitting part of parts), and the attribute C indicates that the graphic element requires normal dimensional accuracy. In particular, this indicates that it is a graphical element that requires the illustrated negative tolerance.

The contents of the attribute information table can be changed as necessary.

■ Step S.

The attribute information extraction unit 111 extracts a unit, that is, one item of attribute information (for example, attribute A) from the attribute information of the two-dimensional figure to be created that is stored in the figure information storage device 14,
It is input to the dimension entry target extraction unit 112.

(2) Step St The dimensioning target extraction unit 112 determines whether the input attribute information A is an element to be dimensioned, that is, a graphical element, and extracts the attribute of the graphical element.

Attribute A is extracted because it is an attribute of a graphic element.

The graphic shape information extraction unit 113 extracts the graphic shape information of the graphic element having the extracted attribute A from the graphic information storage device 14 . The graphic element corresponding to the dimension indicated by A in FIG. 4 has attribute A.

(2) Step S3 The axis-parallel line segment extraction section 122 extracts line segments parallel to the X-axis or Y-axis from each graphic element having the extracted attribute A, and sends them to the graphic dimension information storage section 123.

(2) Step S4 The graphic dimension information storage section 123 stores the input starting point and ending point information of each line segment in the graphic information table 123a.

■ Step S5 The dimensional accuracy selection unit 121 extracts the dimensional information of each graphic element having the attribute A extracted by the dimension entry target extraction unit 112 into the fourth
The selection is made with reference to the dimension information table 121a shown in the figure. From the dimension information table of FIG. 4, the number of significant digits of the dimension of each line segment having attribute A is selected to be one digit. Note that since the tolerance is not specified, the prescribed tolerance value will be used.

This dimensional accuracy information is sent to the graphic dimension information storage section 123 and stored in the same area as the end point information of each line segment having attribute A in the graphic information table 123a.

■ Step S6 When the above processing regarding attribute A is completed, each attribute B,
The above-described steps 81 to S are repeated sequentially for C, D, etc.

As a result, the graphic information table 123a includes attributes A,
The end points (starting point and ending point) of each line segment parallel to the X-axis or Y-axis of the graphical element having B, C, and D and its dimension information are entered.

In FIG. 4, each graphical element corresponding to dimensions indicated by B, C, and D has attributes B, C, and D.

(2) Step S7 The X-coordinate relocation unit 124 extracts the end points of each line segment and their dimensional accuracy information from the graphic information table 123a, rearranges them in ascending order (or descending order) of the X-coordinate values, and stores them in the X-coordinate layer table 124a.

On the other hand, the Y coordinate relocation unit 125
The end points of each line segment and their dimensional accuracy information are extracted from 3a, rearranged in ascending order (or descending order) of Y coordinate values, and stored in the Y coordinate order table 125a.

By doing this, it is possible to write dimensions without overlapping when writing dimensions on the created figure.

■ Step S8 The dimension entry data creation unit 126 uses the X coordinate layer table 12
4a and the rearranged end points of the Y coordinate order table 125a and their dimensional accuracy information, dimensioning data of the graphic element to be dimensioned is created and stored in the dimensioning data table 126a.

■ Step S.

The figure creation means 13 has a dimension entry data table 126a.
The dimension entry data is taken out, and two-dimensional graphic data with larger dimensions is created.

In that case, the written dimension data in the X and Y directions is
Since the coordinate values are taken out and written in ascending order (or descending order), the dimensions are written without overlapping each other, as shown in FIG. 5. Note that the radius dimension (R2 in Figure 5 (C)
, OO) are entered in the conventional manner.

By doing the above, as shown in Figure 5, dimensions are entered with dimensional accuracy, that is, the number of digits and necessary tolerances, corresponding to the attributes of each graphic element, and the drawing is easy to read without overlapping dimension entries. can be created efficiently.

〔Effect of the invention〕

As explained above, according to the present invention, the following effects can be obtained.

(a) It is possible to select the precision of the dimensions of each two-dimensional figure in accordance with the attributes of the figure element.

(b) Necessary tolerances can be automatically entered in the entered dimensions.

(c) Dimensions are written by extracting only the graphical elements that require dimensioning from the attributes of the constituent elements of the two-dimensional figure.
It is possible to efficiently create easy-to-read drawings without unnecessary dimension entry.

[Brief explanation of the drawing]

Fig. 1...Explanatory diagram of the basic configuration of the present invention, Fig. 2...
An explanatory diagram of the configuration of an embodiment of the present invention, Fig. 3...A processing flowchart of the embodiment, Fig. 4...An explanatory diagram of a dimensional accuracy table used in the embodiment, Fig. 5... An explanatory diagram of an example of a two-dimensional figure created by the same embodiment, FIG. 6...An explanatory diagram of an example of a two-dimensional figure created by the conventional automatic dimension entry method, in FIGS. 1 and 2, 11. ...Figure shape information extraction means, 12...Dimension entry data creation means, 13...Graphic creation means, 14...
Graphical information storage device. Patent Applicant: Fujitsu Reisakusan Co., Ltd.'s Karei structure Figure 1: Seven fruit chants; Introduction 1. 4th
Figure DCCA 2nd time (C) 2nd time (C) 1st time

Claims (2)

[Claims] (1) An automatic dimension entry method for a two-dimensional figure that automatically enters dimensions on a two-dimensional figure based on two-dimensional figure information having figure shape information and attribute information of the two-dimensional figure, comprising: (a) (b) figure shape information extracting means (11) for extracting figure shape information of each figure element to be dimensioned from the two-dimensional figure information based on attribute information in the two-dimensional figure information; Dimensioning data creation that selects the dimensional accuracy of a graphical element according to the attributes of the target graphical element, and creates dimensioning data for each graphical element to be dimensioned based on this dimensional accuracy information and graphical shape information. means(
12) An automatic dimension entry method for a two-dimensional figure. (2) The dimension entry data creation means (12) selects the dimensional accuracy of the graphic element by referring to the dimensional accuracy table (121a) in which attribute information and the corresponding dimensional accuracy are entered. An automatic dimension entry method for a two-dimensional figure according to claim 1.