JPH0619982A - Drawing data base retrieval method - Google Patents

Abstract

PURPOSE:To shorten the retreival time by preparing a drawing data file capable of numerical operation from a drawing file, comparing/calculating the representing measure of parts or the like with the data of the file and selecting the optimum file. CONSTITUTION:A first data base which is the set of the drawing files for storing drawing information is converted to a second data base by a conversion utility program 1. The second data base is the set of the drawing data files for which the information of the measure or the like for determining the shape of a jig is extracted from the first data base to be reconstituted to the shape capable of the numerical operation and the information required for stipulating the size and the shape of the jig is written. Then, the data of the measure or the like inside the drawing data files and the representing measure inputted from an input device 2 are compared and calculated and the retreival of the drawing data files is successively repeated until the optimum drawing data file is selected. Thus, the retreival is enabled only by the numerical operation and the retreival time can be shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for retrieving a drawing database using a CAD system.
A drawing database search that enables you to efficiently select the most suitable jig from the jigs to be used in the assembly work that combines each element into a product in the manufacturing process of a product consisting of multiple elements It is about the method.

[0002]

2. Description of the Related Art Conventionally, when assembling work for combining a plurality of elements in manufacturing a product, a jig or the like to be used is searched using a CAD system. This search method requires a large number of jigs, etc.
A drawing database, which is a two-dimensional or three-dimensional drawing for each point, is used, and work to display a two-dimensional or three-dimensional drawing for each point on a display device such as a display until selection of the object Is repeated multiple times. For example, in an assemble work that combines each element of a product composed of multiple elements, when searching for the optimum one from a large number of jigs, first make each element that constitutes the product into a drawing and Displaying is performed on the display device. Next, the jigs in the drawing database are displayed one after another so as to be overlapped with the previously displayed elements, and the jigs and the jigs used when the jigs grip or fix each element are displayed. Check the combination status with the element. For example, in the case of a two-dimensional drawing, the combination state of the jig and the elements in the front view, the plan view, and the elevation view is confirmed, and the jig having the optimum dimensions is selected in the actual assembling work. .

[0003]

However, in the above-described conventional search method, two-dimensional or three-dimensional drawing information is retrieved from the drawing database and displayed on the display device of the CAD system one by one. However, a large waiting time due to repeated display was required.

The present invention has been made in view of the above problems of the conventional method, and an object of the present invention is to provide a drawing database search method capable of significantly reducing the waiting time.

[0005]

In order to achieve the above object, the present invention has the following constitution. That is, it is a method for searching a drawing database using a CAD system and selecting the most suitable jig or the like for use in product manufacturing, which is a drawing for displaying a two-dimensional or three-dimensional drawing on a display device. From a drawing file that contains information,
The required data is extracted by the program to create a drawing data file that can be numerically calculated, and one or more representative dimensions of parts, products, etc., related to the selection of jigs, etc. are input from the input device of the CAD system and input. A drawing database search method characterized by repeating the search of drawing data files sequentially until the optimum drawing data file is selected by comparing and calculating the representative dimensions with the data such as the dimensions stored in the drawing data file. is there.

[0006]

That is, in the past, two-dimensional or three-dimensional drawing information was displayed on a display device such as a display and searched, but in the method of the present invention, a drawing file consisting of drawing information is previously applied to an application.・ The data is stored as a drawing data file that can be numerically calculated by a program, and the data such as the dimensions in this drawing data file is compared and calculated with the representative dimensions input from the input device. By performing the search by replacing the drawing comparison with the numerical comparison as described above, the time required for one drawing comparison is, for example, several tens of seconds in the conventional method, whereas in the numerical comparison according to the method of the present invention, Can be processed in units of one hundredth of a second, which makes it possible to dramatically reduce the time. In fact, when hundreds of points are searched by drawing comparison, an average processing time of several hours is required, but according to the method of the present invention in which numerical comparison is performed, the same processing is completed in only a few minutes. be able to.

[0007]

EXAMPLES Hereinafter, as examples of the method of the present invention, examples in which the method of the present invention is applied to selection of a jig used in a process of assembling a container which is an element of a product will be described in detail.

FIG. 1 is a flow chart showing the process of searching the drawing database according to the method of the present invention.
In this flowchart, in order to make the flow of processing easier to understand, the processing by the CAD system and the operation by the operator are mixed.

The primary database is a drawing file for storing drawing information when a drawing is handled by a program such that the CAD system displays a two-dimensional or three-dimensional drawing on a display or prints out from a printer. It is a set. Each drawing file includes the header part (XYZ coordinate range, definition of drawing size), entity part (base point, line segment, circle (arc), ellipse (arc), angular dimension, etc. The number of points to be configured, line type / pitch, width, type of color, etc.), point information section (base point, line segment and other points XYZ coordinate display), and the like. In this embodiment, the jig database used in the container assembling process is stored in the drawing database.

First, a conversion utility program, which is a part of an application program, converts the primary database into a secondary database (step 1). This secondary database is
It is a set of drawing data files that are reconstructed in a form that can be numerically calculated by extracting information such as dimensions and angles that determine the shape of the jig from the primary database by the conversion utility program. Information necessary for defining the size and shape of the jig such as the height dimension, the included angle between the A line and the B line, and the radius of the arc is written. For example, if the jig is in the shape of a rectangular parallelepiped, length 50mm, width 60m
m, height 35 mm, etc.
A database is created with additional information such as width and height added. Specifically, the above conversion processing obtains information such as a line segment and a circular arc from the information of the entity part of the primary database as information, and further calculates the length of the line segment from the coordinates of the point information part. Or by defining a circular arc. In particular, when the object to be selected is an assembly jig as in the present embodiment, the jigs have the same number of line segments, the same number of arcs, etc., but differ only in dimensions. Therefore, the conversion process from the primary database to the secondary database is a simple process repeated and can be executed extremely efficiently.

FIG. 2 shows an example of a screen for performing a process for selecting an optimum jig in this embodiment. In the upper part of this screen, "Select Process Assemble Jig" is displayed, and it is composed of an upper input screen (1) and a lower output screen (2) below it.

First, according to the instruction "Please input the dimensions of the container in mm" at the upper part of the input screen (1), representative dimensions of the container to be assembled as a product element, vertical, horizontal, Required items such as height are input from an input device such as a keyboard (step 2).

Next, the drawing data files of the secondary database are sequentially searched, and the dimension data of each jig stored in this drawing data file are sequentially compared with the representative dimensions of the container input in step 2 above. The optimum jig drawing data file is selected by calculation (step 3).

Then, the drawing file of the primary database corresponding to the drawing data file of the secondary database selected in step 3 above is specified, and the drawing file names thereof are, for example, "J1052", "J2104", "J3".
077 "are output and displayed on the output screen (2) shown in FIG. 2 (step 4). At this time, if the drawing file of the primary database and the drawing data file of the secondary database have the same file name, it is output when the drawing data file of the secondary database is selected in the above (step 3). Output and display are performed on the screen (2), and the process of (step 4) above can be omitted.

As described above, steps 1 to 4 are the processes of the application program in the method of the present invention. If necessary, the drawing information is displayed on the display and the element (container) and the jig are superposed. It is also possible to execute processing for confirming the optimality (step 5).
This drawing comparison is equivalent to the final confirmation by the actual product alignment that is usually performed in jig selection and the like.

In the above embodiment, the selection of the jig used in the process of assembling the container, which is an element of the product, was described, but the method of the present invention is not limited to this embodiment.
It can be widely applied to a method of selecting various articles by searching a drawing database.

[0017]

As described above, according to the present invention, in the drawing search processing using the CAD system, the following steps are taken:
Since it is not necessary to call the three-dimensional or three-dimensional drawing information on the screen of the display device or the like, and the search processing can be performed only by numerical calculation, the processing time required for the search can be dramatically reduced.

[Brief description of drawings]

FIG. 1 is a flowchart showing an example of a search process according to the method of the present invention.

FIG. 2 is a diagram showing an example of a search input screen and a result output screen of an apparatus used in the method of the present invention.

Claims (1)

[Claims] 1. A method for searching a drawing database using a CAD system and selecting an optimum jig from jigs used for manufacturing a product, which displays a two-dimensional or three-dimensional drawing on a display device. The necessary information is extracted from the drawing file containing the drawing information by the application program to create a drawing data file that can be numerically calculated, and one or more representative dimensions of parts, products, etc. related to jig selection etc. Input from the input device of the CAD system,
A drawing database characterized by repeating the search of drawing data files until the optimum drawing data file is selected by comparing and calculating the input representative dimensions with the data such as the dimensions stored in the drawing data file. retrieval method.