JPH07164176A - Method for automatic calibration of copying sensor in laser beam machine - Google Patents

Abstract

PURPOSE:To realize the efficient machining and facilitate the operation by working a copying sensor to automatically execute the calibration after a machining head is positioned. CONSTITUTION:A judgement is made whether or not a machining head is automatically changed in the step S1 and in the case a copying sensor is automatically changed, the machining head changing program in an NC working machine is executed in the step S2. The calibration program is started in the step S3. In the step S4, the origin of a work table is positioned to position the machining head. Then, the M code related to the copying is commanded in the step S5. In the step S6, the ladder, the decoding, and the processing of a programmable controller is realized, and then the copying sensor is worked in the step S7 to automatically execute the calibration in the step S8. This constitution reduces the delivering time of the work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser processing machine capable of automatically calibrating the scanning sensor when the processing head of the laser processing machine or the scanning sensor provided in the processing head is automatically replaced. The present invention relates to a method for automatically calibrating a scanning sensor.

[0002]

2. Description of the Related Art In a laser beam machine, it is necessary to calibrate the scanning sensor when the processing head is removed or when the power is turned on when the scanning sensor provided in the processing head is removed.

Conventionally, as a method of calibrating the scanning sensor, after confirming that there is a work below the processing head, the calibration switch of the scanning sensor operation box connected to the scanning sensor is pressed to turn on the lamp. . Next, the calibration program is executed and the machining head is returned to the origin in the Z-axis direction (vertical direction), whereby the calibration is completed.
This calibration operation was performed by the operator.

[0004]

By the way, the above-described conventional calibration sensor calibration operation has a problem that it is difficult to use because the operator must operate the calibration switch of the scanning sensor operation box. Further, at the time of calibration, the work needs to be provided below the processing head, and the work or the processing head must be moved. Further, even if the machining head is automatically replaced, there is a problem that the calibration operation of the scanning sensor is manual, so that the machining head having the scanning sensor cannot be automated after the replacement.

In order to solve the above-mentioned problems, an object of the present invention is to automatically perform the calibration operation of the scanning sensor when the processing head or the scanning sensor provided in the processing head is automatically replaced. An object of the present invention is to provide an automatic calibration method for a scanning sensor in the laser processing machine.

[0006]

In order to achieve the above object, the present invention provides a calibration program in an NC device when a machining head in a laser beam machine or a scanning sensor provided in the machining head is automatically replaced. The invention is characterized in that after the machining head is activated and the machining head is positioned relatively to a calibration work provided at a designated position on a work table, a scanning sensor is activated to automatically perform a calibration operation. It is a method of automatically calibrating a copy sensor in a laser beam machine.

[0007]

By adopting the method for automatically calibrating the copying sensor in the laser processing machine according to the present invention, when the processing head in the laser processing machine or the scanning sensor provided in the processing head is automatically replaced, it is automatically replaced. The signal is input to the NC device and the calibration program is started. The processing head is relatively positioned above the calibration work provided at a designated position on the work table, for example, the origin of the X and Y axes. Next, the scanning sensor is operated and the calibration operation is automatically executed.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings.

Referring to FIG. 2, the laser beam machine 1 is provided with a machining head 3 which is movable in the Y-axis and Z-axis directions, for example, and a scanning sensor 5 is provided below the machining head 3. ing. A work table 7 which is movable in the X-axis direction is provided below the processing head 3.
A calibration work W _c, such as SUS material, is attached in advance to the origin position as a designated position on the work table 7.

The copying sensor 5 includes a copying sensor amplifier 9
Is connected, and a relay 11 is connected to the copying sensor amplifier 9. The output module 13 of the I / O unit is connected to the relay 11, and the NC device 15 is connected to the output module 13. The NC device 15 is connected to the processing head 3.

The NC device 15 stores a calibration program as shown in FIG. The electric circuits of the copying sensor amplifier 9, the relay 11 and the output module 13 are as shown in FIG.

With the above construction, the operation of this embodiment will be described with reference to the flow chart shown in FIG. 1. In step S1, it is judged whether or not the machining head 3 is to be automatically replaced. When performing automatic replacement, the machining head replacement program stored in the NC device 15 is executed in step S2. When the machining head 3 is automatically replaced, the calibration program shown in FIG. 3 is started. Processing head 3 in step S1
When the automatic exchange of No. is not performed, the process proceeds to step S3, and the calibration program is started.

[0013] processing head 3 is positioned over the calibration workpiece W _c in the home position performs an origin position of the work table 7 at step S4.
In step S5, the copying-related M code is commanded. In FIG. 3, the copying function switch is turned on by M720 and M721,
OFF, M722 and 723 give a command to turn the calibration on and off.

After performing the ladder, decoding and processing of the programmable controller (PMC) in step S6,
In step S7, the electric signal shown in FIG. 4 is output to the scanning sensor 5, and in step S8, the calibration operation is performed and the process ends.

As described above, when a command for completing the automatic replacement of the machining head 3 is input to the NC device 15, the calibration program is activated so that the calibration operation of the scanning sensor 5 is automatically executed. Since the,
There is no need for manual adjustment when exchanging the machining head, and work efficiency and operation can be facilitated.

Further, the M code command in the calibration program eliminates the need for manual intervention, and enables long-term unmanned operation and easy operation. By providing the work for the scanning sensor at the origin position, it is not necessary to carry in and out the work, and it is possible to reduce the time for carrying in and out. Further, the work and the processing head 3 do not come into contact with each other, and a scratch-free processing head can be performed. By executing the calibration program without a workpiece,
It is possible to prevent the processing head 3 from plunging.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. Even when only the scanning sensor 5 is replaced, it can be performed in the same manner as the replacement of the processing head 3.

[0018]

As understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, it is provided in the processing head or the processing head. When the scanning sensor is automatically replaced, the calibration operation of the scanning sensor can be automatically performed by the command that the automatic replacement is completed. Therefore, there is no need for manual adjustment when exchanging the machining head, and work efficiency and operation can be facilitated.

Since the calibration work is provided at the designated position on the work table, for example, the origin position, it is not necessary to carry in and out the work, and the work time for carrying in and out can be reduced.

[Brief description of drawings]

FIG. 1 is a flowchart for executing a calibration operation of a scanning sensor according to the present invention.

FIG. 2 is an explanatory diagram for calibrating a scanning sensor in a laser processing machine embodying the present invention.

FIG. 3 is a diagram showing an example of a calibration program.

FIG. 4 is an electric circuit diagram of a copying sensor amplifier, a relay, and an output module.

[Explanation of symbols]

1 Laser processing machine 3 Processing head 5 Copy sensor 7 Work table 9 Copy sensor amplifier 11 Relay 13 Output module 15 NC device W _c Calibration work

Claims (1)

[Claims] 1. When a machining head in a laser beam machine or a scanning sensor provided in the machining head is automatically replaced, a calibration program in the NC device is started to perform calibration provided at a designated position on a work table. A method for automatically calibrating a scanning sensor in a laser beam machine, comprising: positioning the processing head relative to a workpiece and then activating the scanning sensor to automatically perform a calibration operation.