JP2003225783A - Method and device for resuming laser beam machining after midway stoppage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To resume laser beam machining, after a midway stoppage during the machining program execution, freely and selectively either on the half- finished product or on an unprocessed product to be machined next. <P>SOLUTION: A device for resuming laser beam machining after midway stoppage is equipped with selecting means 11, 12 in resuming laser beam machining of a product, either the one stopped midway during the machining or the one to be machined next; a PTP moving control means 4 for moving a machining head, from point to point, from the midway stopped position to where machining is resumed on the product selected; and a CP transfer control means 5 for transferring the machining head by the manipulated variable from the machining starting position of the selected product prior to the resumption of the laser beam machining, along the moving locus based on the machining program for the product, in accordance with the moving operation, after the completion of the movement through the PTP moving control means for the machining head. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for restarting a laser processing after being stopped and a restarting apparatus for restarting a laser processing when the laser processing is stopped during execution of a processing program by a laser processing machine. Is.

[0002]

2. Description of the Related Art Generally, in a laser processing machine equipped with an NC device, laser processing is executed according to a processing program given as NC data. If an abnormality occurs in the high frequency power supply and the output of the laser beam is interrupted during execution of such laser processing, the emergency stop means is activated to stop the operation of the laser processing machine. Stops on the way. In this case,
The laser processing must be restarted after investigating the cause of the emergency stop of the laser processing machine and taking necessary measures such as eliminating it.

[0003] In the conventional method for restarting after mid-stop or the device for restarting after mid-stop used for resuming such a laser processing that has been stopped midway, the restart position is predetermined, and in general, for products that have been stopped during execution. It was decided to return to the processing start position and restart laser processing from there.

[0004]

However, in such a conventional type, when the operator judges that the product is defective in the middle of laser processing and presses the stop button to stop the laser processing machine, for example. In addition, it cannot be used as a method / device for restarting it. That is, in such a case, the product stopped in the middle of execution is not processed further, and the laser processing is restarted from the next product. Since it is not prepared, there is a problem that the operator must manually perform all necessary operations and settings one by one.

An object of the present invention is to eliminate the problems of the above-mentioned conventional ones, and when the laser processing is stopped during the execution of the processing program, the laser processing is restarted from the product stopped during the execution, or It is an object of the present invention to provide a method and an apparatus for restarting the laser processing after being stopped halfway, in which it is possible to restart the laser processing from any of the products to be executed next by selecting whether to restart the laser processing.

[0006]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems, and the invention according to claim 1 is a processing in which a unit of a product is from a descending command to an ascending command of a machining head of a laser beam machine. In the restart method after the laser processing is stopped halfway, when the laser processing is stopped during the execution of the program, the laser processing is restarted from the product stopped during the execution, or the laser processing is performed from the next product to be executed. Prompt for selection input of whether to resume, after the selection input,
The processing head is moved point-to-point from the position where the laser beam was not output to the processing start position of the selected product while the laser beam was not output, and the position where the movement has ended is the processing start of the product that was stopped halfway. When the position is the position, the operation of moving the processing head from the processing start position to the position where the processing is stopped is prompted, and the processing head is left in the non-output state of the laser beam according to the operation of moving the processing head. After moving along the movement trajectory based on the machining program of the product stopped halfway, after the movement,
A method for restarting the remaining laser processing after the intermediate stop of the laser processing, which restarts the remaining laser processing based on the processing program of the product which is stopped halfway in response to the restart operation.

According to a second aspect of the present invention, after the laser machining is stopped midway, the laser machining is restarted when the laser machining is stopped during the execution of the machining program in which the unit of the product is from the descending command to the ascending command of the machining head of the laser beam machine. In the restart method,
Prompt the selection input of whether to restart the laser processing from the product stopped during the execution or restart the laser processing from the product to be executed next, and after the selection input, the laser beam is not output to the processing head. The point-to-point movement is continued from the position where the processing is stopped halfway to the processing start position of the selected product, and when the position where the movement is completed is the processing start position of the product to be executed next, restart is performed. The method is a method for restarting laser processing from the processing start position according to an operation based on a processing program for the product, after the laser processing is stopped halfway.

According to a third aspect of the invention, the laser machining is restarted when the laser machining is stopped during the execution of the machining program in which the unit of the product is from the descending command to the ascending command of the machining head of the laser machining machine. In the restart device,
After restarting product selection means for selecting whether to restart the laser processing from which of the product stopped during the execution or the product to be executed next, and after selection by the restarting product selection means,
Machining head PTP movement control means for moving the machining head in the non-output state of the laser beam from the position where it is stopped halfway to the machining start position of the selected product, and the machining head PTP movement control. After the completion of the movement by the means, a machining head that moves the machining head by an operation amount along a movement trajectory based on the machining program of the selected product from the machining start position of the selected product according to the movement operation, before the laser machining is restarted. It is a device for restarting the laser processing after it is stopped halfway, which is provided with a CP movement control means.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a restarting apparatus after a half-way stop of laser processing according to the present invention. This restarting apparatus 1 after a half-stop of laser processing includes a NC apparatus 20. It is applied to the machine 40.

The NC device 20 includes an NC data memory 21 for storing NC data generated by a higher NC program generating device (not shown) such as an automatic programming device and transmitted through a communication line, and the NC data memories 21 to N.
An NC data processing unit 22 that reads C data and performs necessary processing, a machine control unit 23 that applies the NC data processed by the NC data processing unit 22 to the laser processing machine 40, the machine control unit 23, and the laser processing machine. The status monitoring unit 24 monitors the status of 40.

The laser processing machine 40 includes a servo system 41 such as a servo motor, a sequencer 42 that operates in accordance with the operation of the servo system 41, and a high frequency power source 43 for generating a laser beam.

The NC data from the machine control unit 23 is transmitted to the servo system 41 of the laser processing machine 40 to operate the drive members of each unit such as the servo motor. Also, the servo system 41
The operation signal of the sequencer 42 that performs a predetermined operation such as position detection in response to the operation of is transmitted to the servo system 41. Then, these servo system 41 and sequencer 4
In addition to 2, the state monitoring unit 24 monitors the state of each unit of the laser processing machine 40 including the high frequency power supply 43.

That is, the status monitoring unit 24 monitors the status of each part of the machine control unit 23 and the laser processing machine 40 including the servo system 41, the sequencer 42, and the high frequency power supply 43, thereby monitoring the execution status of the processing program. . And
For example, when an abnormality occurs in the high frequency power supply 43 and the output of the laser beam is interrupted, or when an abnormality occurs in which the execution of the machining program cannot be continued, the abnormality is notified to the machine control unit 23.

When the machine control section 23 is notified by the state monitoring section 24 of an abnormality that the execution of the machining program cannot be continued, the machine control section 23 activates an appropriate emergency stop means to stop the operation of the laser processing machine 40, and at the same time, to perform the laser processing. The restarting device 1 is started after being stopped halfway.

Further, the machine control section 23 is provided with various operation buttons including a "retry" button 31, a "start" button 32, and a "stop" button 33. For example, the product is defective during laser processing. When the operator judges that the "Stop" button 33 is pressed, the laser processing machine 4
The operation of 0 is stopped, and the restarting device 1 is started after the laser processing is stopped halfway.

The device 1 for restarting after the laser processing is stopped includes a restart operation screen memory 2 and a display unit 3. When activated by the machine control unit 23, the screen data of the restart operation screen stored in the restart operation screen memory 2 is displayed on the display unit 3. Screen data of a “retry operation panel” (restart operation screen) 10 shown in FIG. 3 is stored.

As shown in FIG. 3, the "retry operation panel" 10 has a "product skip back" button for selecting which of a product stopped in the middle of execution and a product to be executed next to restart the laser processing. 11, "Skip product skip" button 12, "Small movement" button 13, "+" button 14, "-" button 1 to be selected when a moving operation is required from the processing start position of the product for restarting laser processing
Action selection buttons including 5 are displayed to prompt the operator to select these actions.

Further, the laser processing apparatus 1 is restarted after being stopped midway.
Is the processing head PTP movement control unit 4 and the processing head CP.
The movement control unit 5 is provided.

The processing head PTP movement control unit 4 uses the "retry operation panel" 10 to "return product skip" button 1
When 1 is selected by the operator, the NC data processing unit 22 refers to the machining start position of the product stopped during execution. When the operator presses the “retry” button 31 of the machine control unit 23, the processing head PTP movement control unit 4 activates the servo system 41 of the laser processing machine 40 via the machine control unit 23, and the laser processing machine 40 The machining head (the laser beam is in the non-output state) is moved point-to-point (PTP) from the position where it is stopped midway to the machining start position of the product which is stopped midway during execution.

The processing head PTP movement control unit 4 also
When the operator selects the “Skip product skip” button 12 on the “retry operation panel” 10, the NC data processing unit 22 refers to the machining start position of the product to be executed next. When the operator presses the “retry” button 31 of the machine control unit 23, the processing head PTP movement control unit 4 causes the laser processing machine 4 to operate via the machine control unit 23.
The servo system 41 of 0 is operated, and the processing head of the laser processing machine 40 (the laser beam is in the non-output state) is stopped from the position halfway to the processing start position of the next product to be executed point-to-point. It is moved by (PTP).

It is needless to say that moving the machining head point-to-point (PTP) includes moving the machining head by connecting a position stopped midway and a machining start position with a straight line. However, the present invention is not limited to this. That is, for example, on the X-Y coordinate plane, when moving from the position P (x1, y1) stopped midway to the processing start position Q (x2, y2), X
Depending on the correlation between the operating characteristics of the axial servo motor and the operating characteristics of the Y-axis servo motor, for example, the X-axis servo motor may have Qx before the Y-axis servo motor that is started at the same time.
A case is also included in which (x2) is reached and stopped there, and the Y-axis servo motor continues to operate and then reaches Qy (y2) and then stops.

Based on the operator's selection of the "skip product back" button 11, the machining head CP movement control unit 5 further starts machining of the machining head that has been moved to the machining start position of the product stopped during the execution. The position is moved from the position to the position where it is stopped halfway.

That is, when the "fine movement" button 13 on the "retry operation panel" 10 is selected by the operator, the machining head CP movement control unit 5 NCs the movement locus based on the machining program of the product stopped during execution. Reference is made from the data processing unit 22. When the “+” button 14 is selected by the operator on the “retry operation panel” 10, the machining head CP movement control unit 5 causes the machining head CP movement control unit 5 to continue pressing the “Retry” button 31 of the machine control unit 23. The servo system 41 of the laser processing machine 40 is operated via the machine control unit 23, and the processing head of the laser processing machine 40 (the laser beam is in a non-output state) is directed from the processing start position to a position where the processing is stopped midway. , (Move forward) along the movement trajectory based on the machining program.

In addition, for example, the operator makes a "retry".
If the button 31 is released too slowly and the stop position is reached too far, the operator selects the "-" button 15 on the "retry operation panel" 10 and then presses the "retry" button 31. Then, the processing head CP movement control unit 5 operates the servo system 41 of the laser processing machine 40 in the reverse direction via the machine control unit 23, and the processing head of the laser processing machine 40 (the laser beam is in a non-output state). Is moved (retracted) in the opposite direction along the movement trajectory based on the machining program from the position where it has gone too far to the position where it has stopped halfway.

Here, when moving (advancing or retracting) the machining head along the movement locus based on the machining program, the operator moves while confirming the position by an appropriate visible laser pointer that moves integrally with the machining head. In this way, in this way, at a position suitable for resuming machining slightly before the position where it stopped midway or on the movement trajectory based on the machining program
It positions the machining head.

Next, the operation of the above embodiment will be described.
This will be described with reference to the flowchart shown in FIG.

First, laser processing is performed by executing a processing program for each product (step S1). That is, a machining program is executed in which a unit of a product is from a descending command (code M103 included in the machining program) to an ascending command (code M104 included in the machining program) of the machining head of the laser beam machine. In this case, the product to be processed next to a certain product may be the same as the previous product or may be different.

If the laser processing is stopped midway for some reason during the execution of such a processing program (step S
2 "Stop halfway"), and the restarting device 1 after stoppage of laser processing displays a restart operation screen ("retry operation panel" 10) (step S3).

Then, the operator selects the "return product skip" button 11 ("return" at step S10) and presses the "retry" button 31 (step S).
11), the processing head PTP movement control unit 4 moves the processing head PTP to the processing start position of the product stopped during execution (step S12).

Next, when the operator selects the "fine movement" button 13 and the "+" button 14 ("+" in step S20) and presses the "retry" button 31 (step S21), the operator "retry". While the button 31 is being pressed, the machining head CP movement control unit 5
However, the machining head is moved (forward) along the movement trajectory of the machining program from the machining start position of the product stopped during execution
(Step S22).

After moving to some extent, the operator selects the "-" button 15 ("-" in step S20) and presses the "retry" button 31 (step S23), and the operator selects "retry" button 31. While continuing to press, the machining head CP movement controller 5 moves (retracts) the machining head along the movement trajectory of the machining program.
(Step S24).

In this way, after the positioning of the machining head is completed, the machining head is positioned at a position where the machining head is stopped midway or at a position just before the position where it is stopped midway on the movement locus based on the machining program and which is suitable for resuming machining (step S25). Y
ES), when the operator presses the "start" button 32 (step S13), the laser processing machine 40 operates to restart the remaining laser processing based on the processing program of the product stopped during execution (step S14).

On the other hand, the operator "sends a product skip"
After selecting the button 12 (“Send” in step S10) and pressing the “Retry” button 31 (step S10)
31), the processing head PTP movement control unit 4 moves the processing head PTP to the processing start position of the product to be executed next (step S32).

When the operator presses the "start" button 32 (step S33), the laser processing machine 40 is activated to restart the laser processing based on the processing program of the product to be executed next from the processing start position. (Step S34).

After repeating such operations, when all the machining programs for various products are completed (step S
40).

[0037]

As described above, according to the present invention, when the laser machining is stopped during the execution of the machining program in which the unit of the product is from the descending command to the ascending command of the machining head of the laser machining machine, it is stopped during the execution. The restarted product selection means for selecting whether to restart the laser processing from the finished product or the product to be executed next, and after the selection by the restarted product selection means, the processing head in which the laser beam is not output is stopped halfway Processing head PT that moves from position to processing start position of selected product point-to-point
After the movement by the P movement control means and the machining head PTP movement control means is completed, according to the movement operation, from the machining start position of the selected product prior to resuming the laser machining, along the movement trajectory based on the machining program of the product. Since the processing head CP movement control means for moving the processing head by the operation amount is provided, it is possible to choose to restart the laser processing from the product in which the laser processing has stopped during the execution of the processing program. It is also possible to choose to restart the laser processing from the product to be executed next. Therefore, for example, when an abnormality occurs in the high frequency power supply and the output of the laser beam is interrupted and the operation of the laser processing machine is stopped, the operator selects and restarts the laser processing from the product stopped during the execution. In addition, if the operator determines that the product is defective in the middle of laser processing and stops the laser processing machine by pressing the stop button, for example, by the operator selecting, Laser processing can be restarted from the next product, and as described above, there is an effect that either operator can freely cope with the selection.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a restarting device after a halfway stop of laser processing according to the present invention.

FIG. 2 is a flowchart showing the operation of the one shown in FIG.

FIG. 3 is a diagram showing a display screen of a retry operation panel (restart operation screen).

[Explanation of symbols]

1 Resuming device after stopping laser processing midway 2 Screen memory for restart operation 3 Display 4 Screen memory for restarting after being stopped halfway 5 Restart data processing unit 10 Retry operation panel (restart operation screen) 11 "Product Skip Back" button 12 "Skip product skip" button 13 "Fine movement" button 14 "+" button 15 "-" button 20 NC device 21 NC data memory 22 NC data processing unit 23 Machine control unit 24 State monitoring unit 31 "Retry" button 32 "Start" button 33 "Stop" button 40 Laser processing machine 41 Servo system 42 Sequencer 43 High frequency power supply

Claims (3)

[Claims] 1. A method of resuming after a midway stop of laser machining, which is resumed when laser machining is stopped during execution of a machining program in which a unit of a product is from a descending command to an ascending command of a machining head of a laser machining machine. Prompt the selection input of whether to restart the laser processing from the product stopped midway or restart the laser processing from the product to be executed next, and after the selection input, leave the laser beam in the non-output state of the processing head. When the point-to-point movement is performed from the position where the processing is stopped halfway to the processing start position of the selected product, and when the position after the movement is the processing start position of the product stopped halfway, the processing start position is changed from the processing start position. The operation of moving the machining head toward the position where it stopped halfway is urged, and the machining head is moved to the laser beam according to the operation of moving the machining head. System is moved along a movement trajectory based on the machining program of the product that has been stopped halfway in the non-output state, and after the end of the movement, the remaining laser processing based on the machining program of the product that has been stopped halfway in response to a restart operation. The method of restarting after laser processing is stopped midway. 2. A method of resuming after mid-stop of laser machining, which is resumed when laser machining is stopped during execution of a machining program in which a unit of a product is from a descending command to an ascending command of a machining head of a laser machining machine. Prompt the selection input of whether to restart the laser processing from the product stopped midway or restart the laser processing from the product to be executed next, and after the selection input, leave the laser beam in the non-output state of the processing head. When the point-to-point movement is performed from the position stopped midway to the processing start position of the selected product, and the position where the movement is finished is the processing start position of the product to be executed next, the restart operation is performed. Accordingly, the laser machining is restarted from the machining start position based on the machining program of the product. How to open. 3. A resuming device after a midway stop of laser machining which restarts when laser machining is stopped during execution of a machining program in which a unit of a product is from a descending command to an ascending command of a machining head of a laser machining machine. Resuming product selecting means for selecting whether to restart the laser processing from the product stopped halfway or the product to be executed next, and the processing head in which the laser beam is in a non-output state after selection by the restarting product selecting means. A processing head PTP movement control means for moving point-to-point from the stopped position on the way to the processing start position of the selected product; and after the processing head PTP movement control means completes the movement,
Machining head CP movement control means for moving the machining head by an operation amount along a movement locus based on the machining program of the product from the machining start position of the selected product in response to the movement operation, before resuming the laser machining. A device for resuming laser processing after being stopped halfway.