JPS62106505A - Preparing device for numerical control data for working of 3-dimensional form - Google Patents

Abstract

PURPOSE:To perform the output of the NC data at a high speed and with high accuracy by adding an interpolation device to a central processing unit. CONSTITUTION:A central processing unit 2 and an arithmetic unit 3 calculate the coordinates based on the form data given from a storage device 1 and convert these data into the NC data together with the coordinates received from an interpolation device 11 to deliver the NC data to a processing machine 4 containing an NC device. The device 11 obtains a quadric function passing through three points P1-P3 when the coordinate values of these points are supplied and substitutes a parameter for calculation of the interpolation data P5-P9. These interpolation data are all delivered to the unit 2. Then the interpolation coordinate value is obtained again by the device 11 and converted into the NC data by the unit 2. This NC data is delivered to the machine 4. This action is repeated until the calculation is through with data and the cutter paths along with a tool passes are decided successively.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention uses an interpolation device to create numerical control data for three-dimensional shape machining, which has the function of outputting NC data at high speed. This is about equipment.

[Conventional technology]

The conventional numerical control data creation device for three-dimensional shape processing was replaced with the fifth
This will be explained with reference to FIGS. Note that numerical control is called NC.

In FIG. 5, after inputting, from the shape data stored in the storage device 1, the arithmetic unit 3 in the central processing unit 2 uses the NC data construction means at each specified step to generate NC data D representing a three-dimensional shape. Output and processing tool with NG device 4
I was sending it to

Next, a mechanism for calculating NC data using a conventional method will be explained. FIG. 6 is a flowchart 1 for calculating NC data. Note that (1) to (5) indicate each step.

Now, cutter path 10 on the three-dimensional shape as shown in Figure 7
is actually a collection of minute line segments as shown in FIG. 8, and is NC data in which the coordinates of each point are output.

When the shape data is input (1), the calculation device 3 changes the parameter Y by a fixed amount in correspondence to each point (2)
, Y on the shape are calculated using the shape construction means 3), and output as NC data to the processing machine 4 with an NC device (4). This first step is repeated until the data calculation is completed (5), and the cutter bus through which the tool passes is determined one after another.

[Problem that the invention seeks to solve]

However, since the shape construction means is not uniquely expressed as a function, the calculation time is long, and if the shape construction means is used every time the parameter Y changes, it takes an enormous amount of time to calculate the coordinate values on the shape. Therefore, there are problems such as a very long time from the start to the completion of NC data output.

This invention ζ was made to solve the above-mentioned problems, and the object is to obtain an NC data creation device for three-dimensional shape machining that can output NC data for three-dimensional shape machining at high speed. .

[Means for solving problems]

The NC data creation device for three-dimensional shape processing according to the present invention has an interpolation device added to a central processing unit.

[Effect]

In this invention, the interpolation device uses a function to interpolate the shape data constructed from the arithmetic device using the shape construction means, and outputs the interpolated data to the central processing unit.

〔Example〕

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and items 1 to 4 are the same as the conventional device shown in FIG.
Reference numeral 11 denotes an interpolation device that creates interpolated data based on the coordinates received from the central processing unit 2. The central processing unit 2 and the arithmetic unit 3 calculate coordinates based on the shape data taken from the storage device 1, convert the coordinates together with the taken coordinates from the interpolation device 11 into NC data, and send the data to the processing tool 4 equipped with an NC device. Output.

Next, the operation of the above embodiment will be explained. Figure 2 1, LNGN
C data output - Char 1., FIG. 3 is a flowchart 1. of the supplementary law of the interpolator 11. In addition, (11) to (16
), (21) to (24) indicate each step.

When the shape data is input (11), the arithmetic unit 3 changes the parameter Y by a fixed amount in correspondence to each point with a larger interval than before (12), and calculates the coordinate value on the shape corresponding to Y by the shape. The coordinate value is calculated using the construction means 13), and when this coordinate value is obtained three times, the central processing unit 2 transfers it to the interpolation device 1.
Output to 1.

As shown in flowchart 1 of FIG. 3, the interpolation device 11 calculates p , , p in FIGS.
, I) When the coordinate values of the three points are input, (21),
As shown in Figure 4(d), the total calculation of the quadratic function passing through three points (22
), by substituting the parameters, the interpolated data P,
~Calculate P8 (23). The interpolation device 11 outputs all this data to the central processing unit 2 (24).

Referring again to FIG. 2, when the interpolated coordinate values are obtained in the interpolation device 11 as described above (14), the central processing device 2 converts this into NC data and outputs it to the NC device processing unit (4). 15).This is repeated until the data calculation is completed (I6), and the cutter path through which the tool passes is sequentially determined.

In addition, in the above embodiment, the data from the calculation device 3 to the interpolation device 11 is
Interpolated data was created by approximating with a quadratic formula by transferring data, but it goes without saying that approximation can be done with higher-order formulas other than quadratic formulas, such as transferring 4 data and approximating with a cubic formula. Smoother interpolated data can be obtained.

Further, the interpolation device 11 includes the storage device 1. A program for a computer including the arithmetic unit 3 and (7) may be realized.

〔Effect of the invention〕

This invention adds an interpolation device that can quickly calculate NC data from three or more points of NC data as described above.
This has the effect of allowing NC data to be output at high speed and with high accuracy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
Figures 2 and 3 (Flowchart 1 showing the processing in Figure 1)
・, Fig. 4 (&) to (e) are data input to the interpolation device, Fig. 4 (d) is interpolated data output from the interpolation device as a result, and Fig. 5 is the conventional NC data creation device. FIG. 6 is a flowchart 1-1 showing its processing; FIG. 7 is a diagram showing an example of a three-dimensional shape; FIG. 8C
FIG. 3 is an explanatory diagram of another cutter path. In the figure, 1 is a storage device, 2 is a central processing unit, 3 is an arithmetic unit, 4 is a processing machine with an NG device, 11 is an interpolation device, and D is NC data. Note that "same" and "same" in each figure indicate the same or equivalent parts. Agent Masuo Oiwa (2 others) Figure 1 Figure 2 Figure 3 Figure 4 (a) (b) Figure 5 Figure 6

Claims (1)

[Claims] In a numerical control data creation device for three-dimensional shape processing that creates numerical control data corresponding to a plurality of cutter passes based on input three-dimensional shape data, from NC data of three or more points on one cutter pass, A numerical control data creation device for three-dimensional shape processing, comprising an interpolation device that outputs NC data between the three or more points by interpolating using a higher-order equation.