JPH045707A - Area working data generating method - Google Patents

Abstract

PURPOSE:To obtain numerical control data for carving and working a pattern along a curved surface by extracting the information of a Z-axis direction for a three-dimensional free curved surface generated by a three-dimensional CAD system, and collecting it into the numerical control data for area working. CONSTITUTION:The graphic 2A on an X-Y direction plane 2 is designed by the three-dimensional CAD system 1 constituted mainly of an electronic computer. Next, the CAD system 1 stores beforehand coordinates on an X and a Y axes (locus in X-Y direction) by the extracting processing XP of an X-Y direction locus. The system 1 generates the three-dimensional free curved surface 3 by generating processing TP. The information of the Z-axis direction for each point of the graphic 2A is extracted by processing ZP by coordinating the pattern 2A on the plane 2 with the curved surface 3. Then, that data is collected by the system 1 into the numerical control data for carving and working the graphic 2A along the curved surface 3. Thus, the correct data for working can be easily obtained in a short time by using the system 1.

Description

[Detailed Description of the Invention] [Summary] Regarding a method for creating area processing data for engraving figures designed with CAD, the present invention particularly involves extracting Z-axis direction information accurately in a short time and creating area processing data. The purpose is to provide a method for creating area processing data by extracting trajectories in the X and Y directions and extracting the Z axis direction tS by other means. For the three-dimensional free-form surface, the Z-axis direction information from the XY plane is extracted using a three-dimensional CAD system, and the extracted Z-axis direction information II is compiled into area processing data using the three-dimensional CAD system. Configure.

[Industrial application field]

The present invention relates to a method for creating area processing data for engraving figures designed using CAD.

Conventionally, when engraving characters or figures, it was not possible to calculate information in the Z-axis direction depending on the shape of the curved surface, such as when the bottom surface was a curved surface.

There was a request to develop a technology to easily obtain information in the Z-axis direction from graphic data designed with CAD.

[Conventional technology]

When drawing characters, figures, etc. on the key knobs of a computer keyboard such as a personal computer, you can either mold synthetic resin or put the colored material for the letters/figures on the inside and the key top forming material on the outside. Color molding. FIG. 3 shows a top view of a white key top with "1" drawn in black.

FIG. 4 shows a cross-sectional view taken along the line IV-IV in FIG.
It appears in the upper center part of 2. FIG. 5 shows a cross-sectional view of a mold for producing the black material 11 of FIG. The type is character frame 13
, a cavity 14 surrounding it, and a core 15 for molding resin. First cavity 14
Resin is poured into the space surrounded by the character frame 13, and then the core 15 is pushed in to form the inner resin (black material) of the key top. At this time, the white material 1 indicated by the arrow AR in FIG.
Since the surfaces of 2 and the black material 11 are made to draw a beautiful curved surface, part 8 (the surface of the letters) in Fig. 4 and part T in Fig. 5 have the same curved surface (in opposite directions). Is it necessary?

Depth data (this is referred to as Z-axis direction information) of the bottom T portion of the character frame 13 shown in FIG. 5 could not be determined by calculation depending on the curved surface shape. Therefore, in the past, a mask mold was created by enlarging the dimensions of the mold using a technique similar to that used when engraving a seal, and a learning process was performed in which the mask was engraved while being scaled down.

[Invention or problem to be solved]

According to the conventional area processing method shown in FIGS. 3 to 5,
When creating an accurate mask mold, it is possible to obtain an accurately machined product by learning engraving, but the mask mold is expensive because it is specially ordered, and learning and engraving takes a long time.

Although it was possible to design an accurate shape using a CAD system for the two-dimensional X and Y planes, it was not possible to accurately obtain information in the Z-axis direction.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks, and in particular to provide a data creation method for accurately extracting Z-axis direction information in a short time and creating area processing data.

[Means to solve the problem]

FIG. 1 is a diagram showing the basic configuration of the present invention. In Fig. 1, 1 is a three-dimensional CAD system mainly composed of an electronic computer, 2 is a plane in the XYY direction, 3 is a three-dimensional free-form surface, XP is an arrow indicating the extraction process of the trajectory in the XYY direction, and TP
is an arrow indicating a three-dimensional free-form surface creation process, and ZP is an arrow indicating a Z-axis symmetry II extraction process.

In a method for creating area processing data by extracting trajectories in the X and Y directions and extracting Z-axis direction information by other means,
The present invention has the following configuration.

That is, the 3D CAD system 1 extracts Z-axis direction information for the 3D free-form surface 3 created by the 3D CAD system 1, and the 3D CAD system 1 converts the extracted Z-axis direction information into numerical values for area processing. It is configured by organizing it into control data.

[Effect]

In FIG. 1, a figure 2A on an open plane 2 in the XY directions is designed using a three-dimensional CAD system 1 mainly composed of an electronic computer. CAD system 1 then XYY
Coordinates on the XY axes (XY force direction locus) are stored in advance by the direction locus extraction process XP. The three-dimensional CA, D system 1 creates a three-dimensional free-form surface 3 through a creation process TP. The figure 2A on the screen 2 in the XY directions is made to correspond to the three-dimensional confessional surface 3, and information in the Z-axis direction for each point on the figure 2A is extracted by processing ZP. The data is compiled into numerical collateral data for engraving the figure 2A along the three-dimensional free-form surface 3 by the three-dimensional CAD system l.

〔Example〕

FIG. 2 is a side view of the three-dimensional free-form surface 3 in order to explain the present invention in detail. In Figure 2, XY
The directional field surface 2 or a surface parallel thereto is considered to be the reference surface 20. The figure 2A is drawn away from the plane 2 or is on the plane 2 in the drawing. Let the coordinates of point P1 be (x+,
y+), and the coordinates of P2 are (Xs I Y2 ).

A three-dimensional CAD system (not shown) executes a "projection program" for two figures onto a curved surface 3, thereby projecting each point P1. The height ZZ2 on the Z axis up to the curved surface 3 can be calculated with respect to P2. When all z,, z2- are calculated for the two figures, for each point of figure 2A (X +, '! +, Z +) (X2.3'2
Z2)-1, it is possible to obtain the coordinates of points corresponding to two figures on the free-form surface 3. Curved surface 3
Numerical control data for engraving the figure 2A along the lines can be obtained.

〔Effect of the invention〕

In this way, according to the present invention, when it is necessary to process even minute points such as letters and marks, and when processing a free-form surface by obtaining information in the Z-axis direction, a three-dimensional CAD system is used. Therefore, accurate machining data can be easily obtained in a short time.

1-3D CAD system 2-X Y plane 3. Three-dimensional free-form surface

Claims (1)

[Claims] In a method for creating area processing data by extracting trajectories in the X and Y directions and extracting Z-axis direction information by other means, For the original free-form surface (3), information in the Z-axis direction from the XY plane (2) is extracted using the three-dimensional CAD system (1), and the extracted Z-axis direction information is extracted using the three-dimensional CAD system (1). A method for creating data for area processing, characterized in that data is compiled into numerical control data for area processing.