JPH01178394A - Laser beam machine for three dimensional shape - Google Patents

Abstract

PURPOSE:To confirm teaching data and to repair by performing a profile control during the execution of an NC command and stopping the execution of an NC program at the time when the deviation amt. of the NC command from the actual position by the profile control exceeds a fixed value. CONSTITUTION:A profile control is performed by measuring the gap from the tip of a nozzle 45 to a work 46 by the detection data from a detector 43 simultaneously with executing an NC command. The deviation of the locus 48 subjected to profile controlling from the locus 49 of the NC command is obtd. by reading the nozzle position of from a position detector 41 and at the time when a deviation amt. 4epsilon1 exceeds a fixed value the execution of the NC command is stopped to perform the correction of a teaching data. Simultaneously with the stoppage an alarm signal is displayed on a display device 30 to display a deviation amt. epsilon1. The stoppage may be done after completion of the block thereof without stopping immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a three-dimensional shape processing laser device that performs three-dimensional processing, and more particularly to a three-dimensional shape processing laser device having a function of confirming teaching data.

(Prior technology) CN combining a laser oscillator and numerical control device (CNC)
C laser processing machines have become widely used. By combining the high-speed processing of laser processing machines with the features of numerical control equipment (CNC) that can control complex contours, it has become possible to process complex shapes at high speed and without contact. In particular, three-dimensional shape processing laser devices capable of three-dimensional processing, which was impossible with conventional punch presses, nibbling machines, etc., have come into practical use.

To perform 3D processing with a 3D shape processing laser device,
In addition to controlling the , Y, and Z axes, it is necessary to control the attitude of the nozzle at the tip, and the nozzle is normally controlled using the α and β axes. Therefore, in a three-dimensional shape processing laser device, processing commands require control of the xSy, z-axes, α-axis, and β-axis.

It is often very difficult to program these commands from drawings; generally, the tip of the nozzle is aligned with the actual workpiece, shape data is collected, and NCJI
Create an ordinance. This is done manually by an operator using a teaching pendant.

[Problem to be solved by the invention]

However, in teaching, the nozzle is manually positioned on the workpiece, the posture of the nozzle is controlled, and then the memory button is operated, and the position of each axis at that time becomes the NC command. As a result, the accuracy of the NC command obtained by teaching, that is, the teaching data, depends on the positioning state of the nozzle and is generally not very high.

In addition, since discrete positions are collected during teaching,
Since the nozzle moves along a defined curve between a teaching point and the next teaching point, large errors may occur along the path depending on the shape of the workpiece.

If the error at this time is too large to be absorbed by profile control, it becomes impossible to process that part, and some parts remain that cannot be machined.

The present invention has been made in view of these points, and it is an object of the present invention to provide a three-dimensional shape processing laser device having a function of confirming teaching data.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a three-dimensional shape processing laser device that performs three-dimensional processing, and includes: a teaching box that teaches NC commands for the X-axis, Y-axis, Z-axis, and nozzle posture; and the NC command. an NC command execution means for executing the NC command; a detector provided near the tip of the nozzle to detect the distance to the workpiece; , a tracing means for controlling the gap between the nozzle and the work to a constant value, and tracing control is also performed simultaneously during execution of the NC command,
A three-dimensional shape machining laser device comprising: a teaching data confirmation means that detects a deviation from a path of a C command and stops execution of an NC command program when the deviation amount exceeds a certain value. is provided.

Further, in a three-dimensional shape machining laser device that performs three-dimensional machining, the teaching box teaches NC commands for the X-axis, Y-axis, Z-axis, and nozzle posture; a command storage means for storing the NC command; NC command execution means for executing the command; a detector provided near the tip of the nozzle to detect the distance to the workpiece; A three-dimensional shape processing laser device is provided, comprising: a teaching data confirmation means for stopping execution of an NC command program when a deviation amount from a standard value of the gap amount exceeds a certain value; .

(Operation) Tracing control is performed while the NC command is being executed, and the gap between the nozzle tip and the workpiece is controlled to a predetermined amount.As a result, the amount of deviation between the NC command and the actual position by tracing control is a constant value. When this value is exceeded, the execution of the NC command program is stopped.

Further, the NC command is executed without performing tracing control, and when the amount of deviation from the standard value of the gap with the workpiece exceeds a certain value, the execution of the NC command program is stopped.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of a three-dimensional shape processing laser apparatus according to an embodiment of the present invention. In the figure, 10 is a control device that stores and executes NC commands and performs tracing control.

11 is a processor that controls the entire system, 12 is a memory that stores a control program, and 13 is an interface circuit with a teaching box, in which an R3232 interface is used. 14 is a display control circuit that creates and sends display data. 15 is a distance detection circuit that receives a signal from the distance detector, converts it into an AD signal, and allows the processor 11 to input the signal.

16 is a DA converter, which converts the speed command from the processor 11 into an analog voltage. 17 is a servo amplifier that drives a servo motor. A position control circuit 18 detects a position signal from a position detector attached to the servo motor.

20 is a teaching box, which is a control panel for an operator to perform teaching.

A processor 21 controls the entire teaching box 20 . 22 is a memory for temporarily storing teaching data, etc., 23 is a keyboard, and 24 is a display device for displaying simple data, and a liquid crystal display device is used. 25 is an interface circuit for coupling with the control device IO.

30 is a display device which receives a video signal from the display control circuit 14 and performs various displays, and also displays an alarm signal, etc., which will be described later.

41 is a position detector of a servo motor 42, and 42 is a servo motor that drives the tracing axis.

A distance detector 43 detects the gap between the nozzle 45 and the workpiece 46, and here a laser measuring device using a semiconductor laser is used. 44 is a laser beam for measurement. In addition to this, a capacitive distance detector that detects distance from capacitance, a magnetic sensor that measures distance by detecting eddy current, etc. can be used. 47 is a mechanical table on which the work 46 is fixed.

The workpiece 46 is irradiated with a processing laser light (not shown) from the nozzle 45, and the workpiece 46 is processed such as cutting and trimming. Note that FIG. 1 only shows servo systems such as servo motors for the tracing axis, and servo systems for other axes are omitted.

The operator uses the teaching box 2o to bring the tip of the nozzle 45 to the workpiece 46, controls the posture of the nozzle along the α-axis and the β-axis, and collects teaching data for each point. This teaching data is stored in temporary memory 22;
is stored and memorized.

After the collection of teaching data is completed, the teaching data is confirmed before laser processing is performed.

At this time, there are the following two methods.

The first method is to perform tracing control while simultaneously executing teaching data, that is, NC command values. This is effective when the accuracy of teaching data is low.

Here, while executing the NC command, the gap from the tip of the nozzle 45 to the workpiece 46 is measured at the same time based on the detection data from the detector 43, and tracing control is performed.As a result, the tip of the nozzle 45 is basically is controlled to keep the distance from the workpiece 46 constant by tracing control while executing the NC command.

FIG. 2 shows the trajectory of the nozzle tip when executing the NC command and following control. In the figure, 45 is the nozzle, 46 is the workpiece, 4th is the actual trajectory of the tip of the nozzle 45, and 49 is the trajectory of the NC command. During execution, the trajectory of NC command 49
and the deviation of the actual profile-controlled trajectory 48 is obtained by reading the nozzle position from the position detector 41,
When the deviation amount Δε1 exceeds a certain value, the execution of the NC command is stopped, the teaching data is corrected, etc. At the same time as the stop, an alarm signal is displayed on the display device 30, and the deviation amount Δ
It is also possible to display ε1, etc.

Furthermore, instead of stopping immediately, it can also be stopped after the block ends.

The second method is to execute the NC command as it is without performing profile control. This is useful when teaching data is collected in detail. N in Figure 3
The nozzle trajectory is shown when only the C command is executed. In the figure, 45 is a nozzle, and 46 is a workpiece. At this time, when the deviation Δε2 between the actual gap between the tip of the nozzle 45 and the workpiece 46 and the standard gap exceeds a certain value, the execution of the NC command is stopped. Other alarms, stopping after a block, etc. are the same as in the first method.

Next, the control processing described above will be described.

FIG. 4 shows a flowchart of processing according to an embodiment of the present invention. In the figure, the numerical value following S is the step number.

[S1] Read the NC command program from the memory 12.

(S2) One block is decoded.

[S3] Check whether there is a tracing command. here,
Tracing commands are issued using modal G codes. If there is no tracing command, go to S4, otherwise go to S5.

[S4] Since there is no tracing command, the NC command is executed as is.

[S5] Since there is a tracing command, perform tracing system J'B.

[S6] Check whether the deviation amount is within the allowable range. If it exceeds the allowable range, go to S7; if it is within the allowable range, go to S8.

[S7] Since the deviation exceeds the allowable range, the stop flag is turned on.

[S8] Check whether distribution is completed. If it is not finished, the process goes to S4 to continue pulse distribution, and if it is finished, the process goes to S9.

[S9] Check whether the stop flag is on. If it is off, go to SlO; if it is on, go to 311.

(510) Check whether the NC command program has ended.

If the process is not completed, the process returns to Sl and continues.

(Sll) Displays status information such as stopped block number and deviation amount.

In the above process, when the amount of deviation exceeds the allowable range, the process is stopped after completing the process for that block, but the execution is directly stopped in [S7], and a warning is sent to the display if necessary. You can also display it in

〔Effect of the invention〕

As explained above, in the present invention, tracing control is performed while the NC command is being executed, and when the amount of deviation between the NC command and the actual position due to tracing control exceeds a certain value, execution of the NC command program is stopped. With this configuration, teaching data can be easily checked and corrected, and reliable teaching data can be obtained.

Also, when the NC command is executed without performing tracing control and the deviation amount from the standard value of the gap exceeds a certain value, the N
Since the configuration is such that the execution of the C command program is stopped, it becomes possible to easily check and modify the teaching data, making it possible to obtain reliable teaching data.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a three-dimensional shape processing laser device according to an embodiment of the present invention. Figure 2 is a diagram showing the trajectory of the nozzle tip when executing NC commands and tracing control. Figure 3 is only for NC commands. FIG. 4 is a flowchart of processing according to an embodiment of the present invention. 1 (L----------・--Control device 11--・--
−−−−−−−−−−−−Processor 12・−−−−−−
---1-----Memory 13-----
−・−・Interface circuit 15・・−・−−−−1−
−・・Distance detection circuit 20−・−・・・−−−−−−・
Teaching box 21-----11---
--Processor 22, ------------Memory 25-----------Interface circuit 43
−・・・−−−−−−−− Distance detector 44−−−−−
・・・−・・−Measurement laser beam 45−・−1−−−−
−・−・−Tzuru46・−・−・−m−−−− Work patent applicant Fanuc Co., Ltd. agent Patent attorney Takeshi Hattori ■ L−1−−−” Figure 1 Figure 2 Figure 3 figure

Claims (8)

[Claims] (1) A three-dimensional shape processing laser device that performs three-dimensional processing, comprising: a teaching box that teaches NC commands for the X-axis, Y-axis, Z-axis, and nozzle posture; a command storage unit that stores the NC commands; NC command execution means for executing an NC command; a detector provided near the tip of the nozzle to detect the distance to the workpiece; and a gap between the nozzle and the workpiece according to the distance detected by the detector. a tracing means for controlling the
A three-dimensional shape machining laser device comprising: a teaching data confirmation means that detects a deviation from a path of a C command and stops execution of an NC command program when the deviation amount exceeds a certain value. . (2) The teaching data confirmation means is characterized in that when the amount of deviation exceeds a certain value, the teaching data confirmation means stops execution of the NC program and issues an alarm.
The three-dimensional shape processing laser device described in . (3) When the deviation amount exceeds a certain value, the teaching data confirmation means terminates the block of the NC program command being executed and stops the program. The three-dimensional shape processing laser device described in . (4) The three-dimensional shape processing laser device according to claim 1, wherein the detector is a laser distance measuring device. (5) A three-dimensional shape processing laser device that performs three-dimensional processing, comprising: a teaching box that teaches NC commands for the X-axis, Y-axis, Z-axis, and nozzle posture; and a command storage means that stores the NC commands. NC command execution means for executing the NC command; a detector provided near the tip of the nozzle to detect the distance to the workpiece; detecting a gap between the tip of the nozzle and the workpiece during the execution of the NC command; A three-dimensional shape processing laser device, comprising: teaching data confirmation means for stopping execution of an NC command program when the deviation amount of the gap amount from a standard value exceeds a certain value. (6) When the deviation amount exceeds a certain value, the teaching data confirmation means stops execution of the NC program and issues an alarm.
The three-dimensional shape processing laser device described in . (7) When the deviation amount exceeds a predetermined value, the teaching data confirmation means terminates the block in progress of the program of the NC program command and stops the program. The three-dimensional shape processing laser device described in . (8) The three-dimensional shape processing laser apparatus according to claim 5, wherein the detector is a laser distance measuring device.