JPS63129404A - Data extending system for nc data generating device - Google Patents

Abstract

PURPOSE:To reduce the number of processes and cost for manufacture of a model, by calculating data extended in a direction of the copying of a digitizer based on a digitized data by inputting an extension condition and the data extended in a direction of picking the digitizer, and adding them on the digitized data automatically. CONSTITUTION:A copying direction data extension processing part 8 performs a data extension processing in a direction of copying by reading a data extension condition from a data extension condition data memory 7, and furthermore, receiving the NC data (numerical control) of a part required for extension from an NC data memory 4 via an extension part NC data setting part 9. Furthermore, the data processed at the copying direction data extension processing part 8 is processed at a data extension processing part 10 in a direction of picking according to the data extension condition of the data extension condition data memory 7, and after that, an extended data is written on the NC data memory 4. And the NC data accumulated in the NC data memory 4 is displayed on the display device of a CRT 13 as a locus data by a data display part 12.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention provides digitized data created by scanning the surface of a model with a complex three-dimensional shape having a free-form surface, etc., using a copying device. The present invention relates to a data extension method in an NC data creation device for adding data for processing an extended portion.

(Technical background of the invention and its problems) In order to process a three-dimensional model with a complex free-form surface, such as a mold, using an NG (numerically controlled) machine tool, the surface of the model must be copied using a digitizer. Based on the digitized data created at the same time, NC data is created using an NC data creation device.
Data needs to be created.

Conventionally, in the case of mold production that requires data on the extension of a model (parts that do not exist as a model), there is no digitized data outside the scanning measurement range of the model, so the extension of the model has to be considered manually. The data was created.

However, the manual method requires a model to be prepared for each manufacturing process, which poses the problem of requiring a large amount of man-hours and cost to produce the model.

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to calculate and create data of a part where a model does not exist from data of a part where a model exists. NC that can reduce man-hours and costs for model production
An object of the present invention is to provide a data extension method in a data creation device.

(Summary of the Invention) The present invention relates to a data extension method in an NC data creation device, in which extension conditions are input when data of an extended portion of the model is added to digitized data created by copying the surface of a model using a copying device. Based on the digitized data, data extended in the tracing direction of the digitizer and data extended in the pick direction of the digitizer are calculated and added to the digitized data for automatic fishing.

(Example of the invention) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram schematically showing the main parts of an NC data creation device that implements the method of the present invention, in which numeral 1 is a floppy disk as an external storage medium, and 2 is a magnetic tape as an external storage medium. . 3 is an NC data input section for inputting digitized data of the model stored on the floppy disk 1 or magnetic tape 2; 4 is an NG data memory for storing the digitized data. On the other hand, 5 is a keyboard for inputting data extension conditions, 6 is a data extension condition setting section for setting the data extension conditions, and 7 is a data extension condition data memory for storing the data extension conditions. 8 is a scanning direction data extension processing section that reads the NC data and the data extension conditions from the extension section NG data set section 9 and performs an extension process in the scanning direction, and IO further performs an extension process in the large direction. This is the data extension processing section. 11 is an NC data output unit that outputs data that has completed extension processing, and 12 is an NG data memory 4.
This is a trajectory data display section that displays data from the CRT 13 as a trajectory on the CRT 13.

The operation of the method of the present invention using the NC data creation device having such a configuration will be described below with reference to the flowchart shown in FIG.

In carrying out the method of the present invention, first, the digitized data of the model stored on the floppy disk 1 or the magnetic tape 2 is input into the NG data memory 4 by the NC data creation device, that is, the NC data input section 3 (
Step Sl). On the other hand, using the keyboard 5, the data extension condition setting unit 6 sets the data extension conditions, that is, the scanning direction (the direction in which the stylus moves on the model surface for a copying operation) and the pick direction (the direction in which the stylus moves in one copy on the model surface). The extension method, extension location, and presence/absence and amount of extension processing (direction in which the operation is completed and proceeds to the start position of the next copying operation) are input into the data extension condition data memory 7 (step S2
). The details of this extension condition will be described later. Then, the scanning direction data extension processing section 8 reads the data extension condition from the data extension condition data memory 7, and further reads the data extension condition from the extension section N.
NC data of a portion necessary for extension is received from the NG data memory 4 via the G data set section 9, and data extension processing in the scanning direction is performed (step S3). Further, the data processed by the scanning direction data extension processing section 8 is processed according to the data extension conditions in the data extension condition data memory 7.
The data is processed in the pick direction data extension processing unit IO (step S4).

After the above data extension process in the scanning direction and pick direction is completed, the extension data is written to the NG data memory 4 via the NG data output unit 11 (step S5), and the data is stored in the NG data memory 4. The NC data obtained is displayed as trajectory data on the display device of the CRT 13 by the trajectory data display section 12 (step S6), and the predetermined data extension operation is completed.

Next, specific examples of the data extension conditions will be described with reference to the accompanying drawings.

There are two types of data extension methods in the scanning direction: a tangential extension method shown in FIG. 3(A) and a Z-axis fixed extension method shown in FIG. 3(B). Here, the start point P+ side of the first copying direction V is defined as the start side, and the end point Pn side is defined as the end side. However, in the case of surface reciprocating scanning, the material is passed on the starting side and ending side determined by the scanning direction of the first grain. First, to explain the tangent extension method shown in Figure 3(A), the start side and end side are set as the extension locations of the digitized data of the original model L, and the length of extension is LQ+ on the start side and LQn on the end side. is set. Then, on the starting side, point Q+ 2M (XQ+, Y
Q+, ZQ+) are calculated.

Similarly, on the end side, there is a point Q expressed by the following equation (2).

The coordinates (XQn, YQn, ZQn) of are calculated.

Then, as shown in FIG. 4 (8), the data 001 of the extension point Q1 on the starting side and the extension point Q on the ending side derived by the above method. data DQn is added to the original digitized data DP to create new NC data in the tracing direction.

Next, to explain the Z-axis fixed extension method shown in Fig. 3(B), the start side and end side are set as the extension locations of the digitized data of the original model L, and the LR is set on the start side as the extension amount.
, , the length of LRn is set on the end side. Then, on the start side, the coordinates (XR
+, YR+, ZR+).

Similarly, on the end side, the point R is expressed by the following equation (4).
Calculate the coordinates of n (XRn, YRo, ZRn).

Then, as shown in FIG. 4(B), the data DRI of the extension point R3 on the start side and the data DRn of the extension point Rn on the end side derived using the above method are added to the original digitized data DP, and new data is created. Create NC data in the tracing direction. In addition, here is Y! Although scanning in the 1ilh direction is shown, in the case of scanning in the X-axis direction, the coordinates of the X-axis and the coordinates of the Z-axis remain the same, and the coordinate of the Y-axis is calculated using the method described above.

Figure 5 shows the extension method in the big direction. Here, the side of the copying start line El in the first big direction U is defined as the start side, and the side of the copying end line En is defined as the end side. First, the big direction extension method is a two-axis fixed method, where the start and end sides are set as the extension locations for the digitized data of the original model M, and the length of MHI is set on the start side and the length of MEn is set on the end side as the extension amount. However, the number of extensions is set at one.

Digitize data of copying start line E, Fr (XF
+, YF+, ZFl), F2(XF2.YF2.XF
2) s・”, Fn-+ (XFn-t, YFn-+, 2
Fn-+), Fn(XFn, YFn, ZFo), the extension data H+ (XI(+, Yl(+, Ztl+)) of the extension line G1 expressed by the following equation (5)
, Hz(X)I2. Yl2. ZH2).

..., Hn-+ (XHo-+, Ylln-+
, ZHn-+ ), t(n (Xflo, Yl(n
.

ZHn) is calculated.

・・・・・・・・・(5) Similarly, the extension data of the copying end line En is written as ■.

(XI+, YI+, ZI+), I2(X12.Yl
2. Zh) ,”, In-+(XIn-+, Yln-+
, ZIn-+), In (XIo, Yln, ZIn)
Then, the extension line Gn expressed by the following equation (6)
Extension data of O J+ (XJ+, YJ+, ZJ+), J
2(XJ2.Yl2゜2J2)+"...+Jn-+(X
J−+, YJ−++ZJn−+)+Jn(XJn.

YJn, ZJo) are calculated.

・・・・・・・・・(6) Here, the Y-axis direction image is shown, but in the case of the The coordinates of are calculated using the method described above.

FIG. 6 shows an application example of the above-mentioned big direction extension method.

By specifying the number of extensions in the pick direction, extension lines N I , N□, N3 . ... can be calculated. This can be processed in the same way on both the big start and end sides.

(Effects of the Invention) As described above, according to the method of the present invention, it is possible to create data for an extended model based on the digitized data measured by the model copying device, so it is possible to reduce the burden on the operator and to model This will greatly reduce the man-hours and costs required for production.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the outline of the NC data creation device that realizes the method of the present invention, Fig. 2 is a flowchart explaining the operation of the method of the present invention, and Fig. 3 (A) shows the data extension method in the scanning direction. Diagram showing a certain close game extension method, same figure (B)
Figure 4 (A) is a diagram showing an example of digitized data created by the close extension method, and Figure 4 (B) is a diagram showing the Z-axis fixed extension method, which is a data extension method in the scanning direction. FIG. 5 is a diagram showing an example of digitized data created by this method, FIG. 5 is a diagram showing a data extension method in the big direction, and FIG. 6 is a diagram showing an example in which the data extension method in the pick direction is applied. DESCRIPTION OF SYMBOLS 1... Floppy disk, 2... Magnetic tape, 3... NG data input section, 4... NG data memory, 5... Keyboard, 6... Data extension condition setting section, 7...・Data extension condition data memory, 8...
Tracing direction data extension processing section, 9... Extension section NO data setting section, lO... Big direction data extension processing section, 1
1...NG data output section, 12...Trajectory data display section, 13...CRT, V...Tracking direction, U...
・Pick direction. Applicant's agent Yasugata Yu Sangyo 2 times dream 5 picture vine 6 picture (A) tea 3 Got XQI YO2ZQ2 i DQtXQn
YQnZQ,? ; DQ71(,4) Tea diagram Got XR+ YRt 'Z, Rt; D
gtXRnYRnZRn; DRn (β) 4 Figure

Claims (1)

[Claims] When adding the data of the extended part of the model to the digitized data created by copying the surface of the model with a copying device,
By inputting extension conditions, data extended in the digitizing direction of the digitizer and data extended in the picking direction of the digitizer are calculated based on the digitized data, and are automatically added to the digitized data. A data extension method in an NC data creation device characterized by the following.