JPH0222708A - How to run NC device and NC machining program - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to an NC device.

[Prior Art] An NC machining program in an NC device includes necessary commands (for example, X1 for axis commands) in an execution block.
00) is to be written in free format,
There is only forward movement.

[Problems to be Solved by the Invention] The conventional NC device described above is capable of processing points P, , P2°, ..., P4 in the middle of moving the cutter in order to process the shape shown in FIG. 3, for example. When I noticed a mistake in the arc shape at point P3, corrected the program, and tried to check again, I was unable to move the cutter directly from point P3 to point P2, so the cutter missed path A to point P5. Thereafter, the program must be corrected by returning to point P via path B, which has the drawback of taking time.

[Means for Solving the Problems] In the method for executing an NC machining program of the present invention, the NC machining program is executed in the reverse direction in response to a reverse command from the outside while the NC machining program is being executed.

Further, the NC device of the present invention includes a backward data storage section and an N
During the execution of the C machining program, there is a reversing data creation unit that extracts the reversing data necessary to reverse the NC machining program from the analysis results of the NC machining program and storing it in the reversing data storage unit, and a reversing command from the outside. When done manually,
It has a retrograde data analysis section that reads the retrograde data from the retrograde data storage section, creates movement data using the retrograde data and the NC7JI program, and outputs it to the NC execution section.

[Function] As mentioned earlier, the NC machining program is in a free format, as shown in Figure 3, and only the information necessary for each block is required to be old, so it is possible to analyze it even from the middle in order to execute it in the forward direction. However, in order to execute in the reverse direction, it is not possible to obtain the same information as in the forward direction by just looking at the previous block, so the reverse movement as shown in FIG. 2 is not possible.

For example, during the execution of the NC machining program in Fig.
When stopping at point Pl in the figure and creating reverse data using the previous block of the machining program, ■
Because there is only a command for the Z axis, the position of the X axis is unstable.

Therefore, the present invention prepares a backward data creation section that creates backward data in advance during forward execution, stores the created backward data in the backward data storage section, and when issuing a backward command, uses that data in advance. Movement data is created using a commanded NC machining program.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the NC device of the present invention, and FIG. 2 is a diagram showing an example of an NC machining program before and after the movement and correction of a cutter.

This NC device includes an input/output signal processing section 1, an NCC nibgram analysis section 2, a reverse data creation section 3, a reverse data storage section 4, a reverse data analysis section 5, an NC execution section 6, a positioning output section 7, and an NC processing section. It consists of program 8.

During the execution of the NC machining program, the reverse data creation unit 3
Reverse data necessary for reversing the NC machining program is extracted from the analysis result of the NC machining program 8 of the NCC on-nibragram analysis 2 and stored in the reverse data storage section 4. Here, the backward movement data includes tool position data (center position data in the case of circular interpolation), tool type, modal information, and the like. When a reverse command is input from the outside via the human output signal processing unit 1, the reverse data analysis unit 5 reads the reverse data from the reverse data storage unit 4, inputs the NC machining program 8, and processes the reverse data. Movement data is created from the and NC machining program 8 and output to the NC execution section 6. When the NC execution unit 6 receives a reverse command from the outside, it executes the NC operation based on the output of the reverse data analysis unit 5 instead of the NCC on-nitrogram analysis 2, and outputs the position command to the servo amplifier via the positioning output unit 7. do.

Therefore, 5 points p, , p, as shown in FIG.

In an NC machining program that moves the cutter from Pl to P, if a program error is discovered at point Pl, the position data of points P+, P2, Pl, etc. are stored in the backward data storage section 4, so Point p2. After performing circular interpolation between p3 and retracing the program to the path C-+D to the position of Pl, modify the NC machining program ■ to ■', and then rerun the modified NC machining program in the forward direction. By executing this, the target route E can be obtained.

[Effects of the Invention] As explained above, the present invention has the advantage that the NC machining program can be checked and corrected in a short time by reversing the NC machining program from an arbitrary point in time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the NC device of the present invention, and FIG. 2 shows the movement of the cutter by the NC device of FIG.
FIG. 3 is a diagram illustrating an example of the movement of a cutter by a conventional NC device and an example of the NC machining program. 1... Human output signal processing unit, 2... NC machining program analysis unit, 3... Reverse data creation unit, 4... Reverse data storage unit, 5... Reverse data analysis unit, 6...NC execution section, 7...positioning output section, 8...NC machining program.

Claims (1)

[Claims] 1. In the NC device, during execution of the NC machining program,
A method for executing an NC machining program in which the NC machining program is executed in the reverse direction based on a reverse command from an external source. 2. In the NC device, extract data necessary for reversing the NC machining program from the analysis results of the NC machining program and store it in the reversing data storage unit and during the execution of the NC machining program. and a reverse data analysis unit that reads reverse data from the reverse data storage unit when a reverse command is input from the outside, creates movement data from the reverse data and the NC machining program, and outputs it to the execution unit. An NC device comprising: