JPH03253913A - Nc device - Google Patents

Abstract

PURPOSE:To execute working of various composite loci by fetching a moving command of each separate locus of a component for constituting a composite locus from an NC working program, interpolating it, and outputting it as a moving command of a coordinate corresponding to each control axis, and counting up the moving command at every control axis. CONSTITUTION:A moving command of a separate locus is mentioned in advance in an NC working program 100, and an NC working program analyzer 101 decodes it and outputs moving commands 111-113 of each separate locus, respectively. Each interpolator 21-23 interpolates the moving commands 111-113 of this separate locus, respectively, and outputs them as moving commands 31-39 of coordinates on each control axis. Moving command computing elements 91-93 are installed in accordance with each control axis, respectively, count up a moving command value of a coordinate of its control axis inputted from each interpolator 21-23, and input it to servo-drives 3-5 of the corresponding control axis. In such a way, an interpolating operation to a composite locus can be processed by only an NC device, and also, a range of the composite locus which can be realized can be widened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an NC device, and more particularly to an NC device capable of giving processing commands for complex trajectories.

[Conventional technology]

FIG. 3 is a block diagram showing the configuration of a conventional example of this type of NC device.

An NC machining program 10 of a complex locus to be machined is input to the NC machining program analyzer 1, which analyzes it and outputs a movement locus command 11 to the interpolator 2. Interpolator 2 uses this command to calculate X, Y,
Necessary interpolation is performed for each Z axis and output as x, y, and z axis movement commands 12°, 13, and 14, respectively. Therefore, the x, y, and z axes servo drives 3 and 4.5 receive x, y, and z axes movement commands 12.13 and 1 that are input respectively.
41.1m Therefore, each X, Y, Z axis servo motor 6.
7.8 respectively, and the commanded movements on each of the x, y, and z axes are performed.

[Problem to be solved by the invention]

In the conventional NC device mentioned above, the movement command for the control axis is limited to the function of the interpolator, but most machining by conventional NC devices involves a straight line trajectory or a circular trajectory, and the function of the interpolator is limited to this function. Stays within range. However, in recent years, machine tools for complex machining have appeared, and demands for machining trajectories other than conventional machining trajectories have increased. Therefore, in order to cope with this, for example, the interpolator has a helical interpolation function that synchronizes the circular trajectory in both the X and Y axis planes with the linear trajectory in the Z axis direction, or the interpolator is controlled by an NC device. A separate drive mechanism is additionally installed on the drive unit of the shaft to achieve combined operation. However, these devices have the disadvantage that the range of complex operations that can be realized is limited and lack flexibility, and that they are only unsatisfactory in terms of cost and device size.

SUMMARY OF THE INVENTION An object of the present invention is to provide an NC device that can process the interpolation operation for the above-mentioned composite trajectory using only the NC device, and that can realize a wide range of composite trajectories.

[Means to solve the problem]

The NC device of the present invention inputs and analyzes an NC machining program that includes movement commands for a plurality of individual trajectories that create a composite trajectory through synthesis, determines the movement commands for the individual trajectories, and outputs each N.C.
a C machining program analyzer; a plurality of interpolators that individually receive movement commands for the individual trajectories, interpolate them, and output movement commands for coordinates corresponding to each control axis; and for each control axis, a movement command calculator that totals movement command values of the coordinates of the control axis output from the interpolator; and a servo drive for each control axis that drives the servo motor of each control axis based on the movement command from the movement command calculation unit. It has

[For production]

A composite trajectory, which is a machining target, is obtained by combining a plurality of individual trajectories that are its components. Therefore, we write movement commands for these individual trajectories in the NC machining program, and
The machining program analyzer decodes this and outputs movement commands for each individual locus. Each interpolator interpolates the movement command for this individual locus and outputs it as a movement command for the coordinates on each control axis. A movement command calculator is installed corresponding to each control axis, and totals the movement command value of the coordinates of the control axis input from each interpolator, and inputs it to the servo drive of the corresponding control axis. That is, each individual trajectory is combined into a composite trajectory by addition by a movement command calculator, and unlike the conventional example described above, no additional drive machine is required, and it can be realized only by processing within the NC device.

Furthermore, by appropriately combining the combinations of individual trajectories, it is possible to easily meet the demands of various complex machining operations.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the NC device of the present invention, and FIG. 2 is an explanatory diagram of an example of a machining trajectory according to the embodiment.

The NC machining program 100 input to this embodiment includes:
The first feature of this embodiment. Second. Third interpolators 21, 22
．． 23, a first interpolator NC machining program, a second interpolator NC machining program, and a third interpolator NC machining program corresponding to each other are described, and a group mark is added to distinguish them. The NC machining program analyzer 101 analyzes the input machining program 10.
0 is analyzed and each movement command 111, 112° 113 corresponding to each of the first to third interpolators is output. The first interpolator 21 inputs the movement command 111 and interpolates the command trajectory, and the corresponding movement command 31 on each of the X, y, and z axes.
, 32°33, respectively. The second interpolator 22 receives the movement command 112, interpolates the command locus, and outputs corresponding movement commands 34°, 35.36° on each of the X, Y, and Z axes. The third interpolator 23 receives the movement command 113, interpolates the command trajectory, and outputs corresponding movement commands 37, 38, and 39 on each of the x, y, and z axes.

The X-axis movement command calculator 91 is the first. Second. Third each interpolator 2
Movement command on the X axis from 1, 22.23 31° 34.3
7 is added and the result is commanded to the X-axis servo drive 3 as an X-axis movement command 12. As a result, the X-axis servo motor 6 is driven. Similarly, the YIII movement command calculation unit 92 and the Z-axis movement command calculation unit 93 are the first. Second.
Movement commands 32.35° 38 on the Y axis and movement commands 33, 36 on the Z axis from each third interpolator 21° 22.23
．． 39 are respectively added, and the respective results are commanded to the Y-axis servo drive 4 and the Z-axis servo drive 5 as a Y-axis movement command 13 and a Z-axis movement command 14, respectively. As a result, the Y-axis servo motor 7 and the Z-axis servo motor 8 are respectively driven.

Next, the operation of this embodiment will be explained with respect to the x, y,
Z to a helical trajectory with the direction shown in the straight line of the z coordinate system
A case will be described in which a trajectory that takes into account the axis reciprocating trajectory is generated.

In this case, the NC machining program for the first interpolator describes the linear movement command 111 in the linear direction shown in FIG. 2(a), and the NC machining program for the second interpolator describes the linear movement command 111 shown in FIG. -A continuous movement command 112 for a circular arc C on the Y plane is written, and the third interpolator NC machining program contains a continuous movement command 113 for a line segment M in the Z-axis direction shown in FIG. 2(C). The first interpolator 21 inputs the linear movement command 111, interpolates a linear trajectory, and outputs X, Y, Z multi-coordinate movement commands 31° 32.33 of the linear trajectory including the interpolation point, respectively. . The second interpolator 22 inputs the circular continuous movement command 112, repeatedly interpolates the circular arc locus C on the X-Y plane, and generates X and Y coordinate movement commands 34 of the circular locus C including the interpolation point.
．． 35 are repeatedly output (Z-axis coordinate movement command 36 is O). The third interpolator 23 is a line segment continuous movement command 11
3 to repeatedly interpolate the line segment locus M on the Z axis,
The Z coordinate movement command 39 of the line segment locus M including the interpolation point is repeatedly output (x*III and Y axis coordinate movement command 37.
38 are all 0). The X-axis movement command calculator 91 is the first.
X-axis coordinate movement command 31 from each of the second interpolators 21 and 22.
34, and the Y-axis movement command calculator 92 adds the first. The Y-axis coordinate movement command 32.35 from the second interpolator 21.22 is added, and the Z-axis movement command calculator 93 adds the Y-axis coordinate movement command 32.35 from the second interpolator 21.22. Third interpolator 21
．． Adding the Z-axis coordinate movement command 33°39 from 23,
Each x, y, z axis movement command! 2. 13. 1
Output as 4. Accordingly, each axis servo drive 3
, 4.5 drive the respective axis surf motors 6, 7.8.

In this way, the three independent trajectories C and M included in the NC machining program 100 are combined, and the target helical trajectory shown in FIG. 2(d) can be machined.

In addition, in the above, the operation of the NC machining program and the NC machining program analyzer is described in the first section. Second. Third, although we have described and executed each interpolator separately, similar operations can be performed in N by using unspecified group marks and addresses.
It is also possible to write it as one block of a C processing program.

〔Effect of the invention〕

As explained above, the present invention extracts movement commands for each individual locus of the components that make up a composite trajectory from an NC machining program, interpolates these, and outputs them as movement commands for coordinates corresponding to each control axis. By aggregating these coordinate movement commands for each control axis, it is possible to synthesize compound trajectories, and by arbitrarily setting combinations of these individual trajectories in the NC machining program, it is possible to create a variety of target compound trajectories. The present invention has the effect of easily realizing an NC device suitable for controlling complex machines.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the NC device of the present invention, FIG. 2 is an explanatory diagram of an example of a machining trajectory according to the embodiment,
FIG. 3 is a block diagram showing the configuration of a conventional example of an NC device. 3...X-axis servo drive, 4...Y-axis servo drive, 5...2-axis servo drive, 6...X-axis servo motor, 7...Y-axis servo motor, 8...Z Axis servo motor, ...X-axis movement command, ...Y-axis movement command, ...Z-axis movement command, ...first interpolator, 22... ...third interpolator, 32.33, 34, 35. 36゜39...Movement command, ...X-axis movement command calculator, ...Y-axis movement command calculator, ...Z-axis movement command calculator, ...NC machining program, ...NC machining program analyzer, 112.113...Movement command, - Straight line, C...Circular trajectory, -Line segment trajectory. -Second interpolator 12, 13, 14, 21, 23, 31. 38°91 ・92 ・93 ・100 ・101 ・111. L・・M・・37゜

Claims (1)

[Claims] 1. An NC machining program that inputs and analyzes a NC machining program that includes movement commands for a plurality of individual trajectories that create a composite trajectory through synthesis, determines the movement commands for the individual trajectories, and outputs the respective movement commands. a machining program analyzer; a plurality of interpolators that individually receive and interpolate movement commands for the individual trajectories and output movement commands for coordinates corresponding to each control axis; a movement command calculator that totals the movement command value of the coordinates of the control axis output from the interpolator; and a servo drive for each control axis that drives the servo motor of each control axis based on the movement command from the movement command calculation unit. An NC device with