WO2015125472A1 - レーザ加工装置 - Google Patents
レーザ加工装置 Download PDFInfo
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- WO2015125472A1 WO2015125472A1 PCT/JP2015/000751 JP2015000751W WO2015125472A1 WO 2015125472 A1 WO2015125472 A1 WO 2015125472A1 JP 2015000751 W JP2015000751 W JP 2015000751W WO 2015125472 A1 WO2015125472 A1 WO 2015125472A1
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- laser
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- time point
- laser beam
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- 238000001514 detection method Methods 0.000 claims abstract description 104
- 238000012545 processing Methods 0.000 claims description 195
- 238000005259 measurement Methods 0.000 claims description 36
- 238000003754 machining Methods 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 18
- 238000012986 modification Methods 0.000 description 33
- 230000004048 modification Effects 0.000 description 33
- 238000005070 sampling Methods 0.000 description 24
- 230000007547 defect Effects 0.000 description 21
- 230000006866 deterioration Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 238000005553 drilling Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 7
- 230000005856 abnormality Effects 0.000 description 7
- 230000005284 excitation Effects 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/42—Printed circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/005—Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping
- H01S3/0071—Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
Definitions
- the present disclosure relates to a laser processing apparatus that performs drilling or the like on a substrate using laser light, and particularly relates to prevention of processing defects due to deterioration of characteristics of a laser oscillator used in the laser processing apparatus.
- the drilling of base materials is becoming more and more precise, and therefore drilling using laser light is increasing.
- the laser oscillator used in the laser processing apparatus is provided as a part of the laser processing apparatus.
- the laser oscillator also deteriorates the characteristics of the laser beam to be output due to deterioration of the laser medium due to long-time use. Since severe deterioration of the output characteristics of the laser beam hinders precise laser drilling, it is necessary to know the output state of the laser beam from the laser oscillator.
- FIG. 15 is a block diagram showing a schematic configuration of a conventional laser processing apparatus 100.
- FIG. 16 is a graph showing detection values of the photodetector 103 of the conventional laser processing apparatus 100.
- the conventional laser processing apparatus 100 includes a laser oscillator 101, a beam splitter 102, a photodetector 103, a counter 104, a main controller 105, and a display 106.
- the main controller 105 outputs a pulse emission command signal to the laser oscillator 101.
- the laser oscillator 101 Upon receiving the pulse emission command signal, the laser oscillator 101 emits the laser r, and a part of the laser r is divided as a determination laser ra by the beam splitter 102 installed in the optical path of the laser r and guided to the photodetector 103. It is burned.
- the photodetector 103 measures the energy intensity of the determination laser ra.
- the laser r separated from the determination laser ra is irradiated on the substrate by changing the irradiation direction by a galvanometer. After laser hole machining is performed by irradiating one divided region of the substrate with laser r for one or a plurality of pulses, the irradiation direction of laser r is changed to the divided region to be laser drilled next by a galvanometer.
- the photodetector 103 measures the energy intensity by converting the light energy of the divided determination laser ra into electric energy.
- FIG. 16 shows the voltage of the laser pulse P1, which is the maximum voltage value V1, the voltage of the laser pulse P2, which is the maximum voltage value V2, and the reference value Vx, which are measured by the photodetector 103.
- the counter 104 is connected to the photodetector 103, measures the number of determination laser ra indicating a voltage value equal to or higher than the reference value Vx necessary for laser drilling, and sends the measured number to the main controller 105.
- the main controller 105 controls the laser oscillator 101 and the counter 104, and compares the number of measurements from the counter 104 with the number of lasers r emitted. That is, if the voltage value detected by the photodetector 103 is equal to or greater than the reference value Vx (the maximum voltage value V1 of the laser pulse P1), the main controller 105 determines that laser drilling has been performed satisfactorily. If the voltage value detected by the photodetector 103 is lower than the reference value Vx (maximum voltage value V2 of the laser pulse P2), the main controller 105 determines that the laser hole machining is defective.
- the main controller 105 determines the quality of the laser drilling and outputs the determination result to the outside or displays it on the display unit 106. As a result, it is possible to know the divided region where the processing defect has occurred and the progress of the laser hole processing.
- the irradiation direction of the hole laser light is moved by a galvanometer.
- the time until the output of the laser beam decreases to near zero is extended due to the deterioration of the falling characteristics of the laser oscillator, the laser beam is irradiated even while the galvano scanner moves in the laser beam irradiation direction. The Therefore, the hole shape by laser hole processing becomes an ellipse or a teardrop shape.
- the laser processing apparatus of the present disclosure monitors the falling characteristics of the laser pulse energy to warn or prevent the occurrence of laser processing defects.
- a laser processing apparatus includes a laser oscillator, a spectroscope, a photodetector, an irradiation unit, and a control unit.
- the laser oscillator outputs laser light.
- the spectroscope receives a laser beam, and separates the laser beam into a processing laser beam and a measurement laser beam and emits the laser beam.
- the photodetector receives the measurement laser beam and transmits a detection signal indicating the intensity of the measurement laser beam.
- the irradiation unit receives the processing laser beam and irradiates the workpiece with the processing laser beam.
- the control unit is connected to the laser oscillator, the photodetector, and the irradiation unit.
- control unit starts output of the laser light at the first time point, and transmits an output signal to stop the output of the laser light to the laser oscillator at the second time point after the first time point. Further, the control unit receives a detection signal indicating a first detection intensity larger than the first set intensity from the photodetector at a third time point after the second time point. Furthermore, a control part transmits the drive signal which controls the drive of an irradiation part to an irradiation part at the 4th time after the 3rd time. Further, the control unit transmits a warning signal at a fifth time after the third time.
- a laser processing apparatus includes a laser oscillator, a spectroscope, a photodetector, an irradiation unit, and a control unit.
- the laser oscillator outputs laser light.
- the spectroscope receives a laser beam, and separates the laser beam into a processing laser beam and a measurement laser beam and emits the laser beam.
- the photodetector receives the measurement laser beam and transmits a detection signal indicating the intensity of the measurement laser beam.
- the irradiation unit receives the processing laser beam and irradiates the workpiece with the processing laser beam.
- the control unit is connected to the laser oscillator, the photodetector, and the irradiation unit.
- control unit starts output of the laser light at the first time point, and transmits an output signal to stop the output of the laser light to the laser oscillator at the second time point after the first time point. Further, the control unit periodically receives the detection signal from the photodetector after the second time point. Furthermore, the control unit receives a detection signal indicating a third detection intensity smaller than the third set intensity from the photodetector at a seventh time point after the second time point. Further, the control unit transmits a drive signal for operating the irradiation unit to the irradiation unit at an eighth time point after the seventh time point.
- the laser processing apparatus monitors the deterioration of the falling characteristics of the laser pulse energy and warns or prevents the occurrence of laser processing defects.
- FIG. 1 is a perspective view showing a schematic configuration of the laser processing apparatus according to the first embodiment.
- FIG. 2 is a block diagram illustrating a detailed configuration of the control unit according to the first embodiment.
- FIG. 3 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the first embodiment.
- FIG. 4 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the first embodiment.
- FIG. 5 is a flowchart showing the operation of the laser processing apparatus according to the first embodiment.
- FIG. 6 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to Modification 1 of Embodiment 1.
- FIG. 7 is a time chart showing the states of (a) a laser pulse output command signal, (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus according to the second modification of the first embodiment.
- FIG. 8 is a flowchart showing the operation of the laser processing apparatus according to the second modification of the first embodiment.
- FIG. 9 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to Modification 3 of Embodiment 1.
- FIG. 9 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to Modification 3 of Embodiment 1.
- FIG. 10 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser machining apparatus according to Modification 4 of Embodiment 1.
- FIG. 11 is a flowchart showing the operation of the laser processing apparatus according to the fourth modification of the first embodiment.
- FIG. 12 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the second embodiment.
- FIG. 13 is a flowchart showing the operation of the laser processing apparatus according to the second embodiment.
- FIG. 14 is a perspective view illustrating a schematic configuration of another laser processing apparatus of the present disclosure.
- FIG. 15 is a block diagram showing a schematic configuration of a conventional laser processing apparatus.
- FIG. 16 is a graph showing detection values of a photodetector of a conventional laser processing apparatus.
- the same components are denoted by the same reference numerals, and the description thereof may be omitted.
- the X axis, the Y axis, and the Z axis shown in the drawings are orthogonal to each other.
- the direction of the Z-axis is a vertical direction corresponding to the top and bottom, and the coordinate axes in each figure are drawn so as to correspond to the directions of the respective fields of view.
- FIG. 1 is a perspective view showing a schematic configuration of a laser processing apparatus 1 according to the present embodiment.
- the laser processing apparatus 1 includes a laser oscillator 2, a spectroscope 3, a photodetector 4, an optical adjustment unit 5, a galvano scanner 6, a condenser lens 7, and a processing table 8.
- the control unit 9 and the warning display unit 10 are provided.
- the galvano scanner 6 and the condenser lens 7 are collectively used as an irradiation unit.
- the laser oscillator 2 receives the laser pulse output command signal 11 output from the control unit 9 and emits a laser beam 21.
- an appropriate system such as a YAG laser or a carbon dioxide gas laser may be selected from energy necessary for processing, a laser wavelength, and the like.
- a description will be given using a sealed RF (Radio Frequency) excited carbon dioxide laser as the laser oscillator 2. This is because it is possible to obtain a laser beam having a high peak output with a short pulse, which is necessary when drilling a substrate as a workpiece at a high speed.
- the laser beam 21 emitted from the laser oscillator 2 is guided to the spectroscope 3 immediately after emission or after being reflected by a mirror depending on the installation location of the laser oscillator 2.
- the spectroscope 3 is a laser splitter that separates incident laser light into reflected light and transmitted light.
- the spectroscope 3 reflects about 0.5% to 1% of the energy equivalent to about 0.5% to 1% of the laser light 21 as the measurement laser light 22, and about 99 which is the majority of the laser light 21.
- the energy equivalent to about 99.5% is transmitted as the machining laser beam 23.
- the measurement laser beam 22 is incident on the photodetector 4 and energy is measured.
- the processing laser beam 23 is guided to the optical adjustment unit 5 for laser processing.
- the spectroscope 3 may transmit a part of the laser light 21 to be the measurement laser light 22 and reflect most of the laser light 21 to be the processing laser light 23.
- the photodetector 4 detects the measurement laser beam 22 and outputs (transmits) a detection signal 12 indicating the energy (detection intensity) of the measurement laser beam 22 to the control unit 9.
- the photodetector 4 includes a light amount measuring element such as a photodiode or a phototransistor, an amplifier circuit, and an analog / digital (A / D) converter.
- the photodetector 4 converts it into a voltage value indicating the detected intensity of the measurement laser beam 22, and converts it into digital data by an A / D converter.
- the A / D converter receives (receives) the sampling command signal 13 from the control unit 9 as a latch clock, detects the voltage value, and outputs (transmits) the digital data as the detection signal 12 to the control unit 9. .
- the processing laser beam 23 is guided to the optical adjustment unit 5.
- the optical adjustment unit 5 includes optical elements such as a collimator lens, a diaphragm, and an iris, and shapes the processing laser beam 23 into a substantially parallel beam bundle having an output (energy) and profile (energy distribution) suitable for laser processing.
- the iris has a shaping hole for shaping the beam shape of the processing laser beam 23.
- the shaped processing laser beam 23 is guided to the galvano scanner 6 which is an irradiation unit.
- the galvano scanner 6 includes a galvano controller 61, motors 62 and 64, and galvanometer mirrors 63 and 65.
- the galvano scanner 6 operates such that the galvano operation command signal 14 is input (received) from the control unit 9 and the machining laser beam 23 is irradiated to the machining position P of the workpiece 99.
- the machining position P by the machining laser beam 23 is scanned in the X-axis direction by the galvano mirror 63 installed in the motor 62, and the machining position P by the machining laser beam 23 is scanned by the galvano mirror 65 installed in the motor 64. Scan in the Y-axis direction.
- the galvano controller 61 controls the galvanometer mirrors 63 and 65 via the motors 62 and 64 according to the data of the machining position P by the machining program.
- the machining laser beam 23 positioned by the galvano scanner 6 is condensed at the machining position P of the workpiece 99 by the condenser lens 7 (f ⁇ lens).
- the workpiece 99 is a sheet-like member such as a substrate, a green sheet, a film, or a thin metal plate.
- the workpiece 99 is placed on the processing table 8.
- the machining table 8 can move the workpiece 99 in the X-axis direction and the Y-axis direction, and can move the workpiece 99 out of the machining area from a machining area that can be scanned by the galvano scanner 6.
- the control unit 9 sends a warning signal 15 to the warning display unit 10 from the operation of the laser oscillator 2, the energy (detection intensity) of the measurement laser beam 22 received from the photodetector 4, and the operation of the galvano scanner 6. Send.
- the time when the warning signal 15 is transmitted to the warning display unit 10 is set as the fifth time point.
- the control unit 9 is connected to at least the laser oscillator 2, the photodetector 4, and the galvano scanner 6, and controls the laser oscillator 2, the photodetector 4, and the galvano scanner 6.
- FIG. 2 is a block diagram illustrating a detailed configuration of the control unit 9 according to the present embodiment.
- FIG. 3 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the present embodiment.
- 3A to 3C are time charts with the horizontal axis at time t, and the scale is not constant, but the context of each time is correct.
- control unit 9 includes a main software processing unit 91, a parameter storage unit 92, a laser output command unit 93, a sampling command unit 94, a detection level receiving unit 95, a comparison unit 96, and a galvano command unit. 97 and a warning signal output unit 98.
- these components visualize the functions of the control unit 9. Therefore, these components may be configured by independent hardware, or may be configured by a combination of an interface and software. Further, these components are for explaining the characteristic configuration and operation of the present disclosure among the functions of the control unit 9, and further have other control functions of the laser processing apparatus 1.
- the parameter storage unit 92 stores various parameters set in advance before the operation of the laser processing apparatus 1 in a format that can be compared with other signal levels.
- the laser output command unit 93 outputs a laser pulse output command signal 11 to the laser oscillator 2 in accordance with the machining program.
- FIG. 3A shows a time chart of the laser pulse output command signal 11.
- the laser pulse output command signal 11 turns from OFF to ON at time t1 (first time point), and time t2 (second time). From time on) to time off.
- the laser pulse output command signal 11 is a pulse signal
- the RF excitation pulse width TP time from time t1 to time t2 is several tens of microseconds to several hundreds of microseconds.
- the optimum RF excitation pulse width TP is determined based on the relationship between the laser power and the material and thickness of the workpiece. In this embodiment, the RF excitation pulse width TP is about 100 ⁇ sec.
- the sampling command unit 94 outputs a sampling command signal 13 to the photodetector 4, commands the photodetector 4 to measure the energy of the measurement laser beam 22 and output the detection signal 12 to the detection level receiving unit 95. .
- the output detection signal 12 is received by the detection level receiving unit 95.
- (B) of FIG. 3 is the detection signal 12 which the detection level receiving part 95 receives from the photodetector 4.
- FIG. the graph of the detection signal 12 is drawn on the assumption that the detection signal is continuously sampled. Since the detection signal 12 is an electric signal proportional to the light amount of the measurement laser beam 22, (b) in FIG. 3 is the same as the energy intensity transition of the laser beam 21. As shown in FIG. 3B, the detection signal 12 starts increasing from time t1 and starts decreasing from time t2.
- the galvano command unit 97 outputs a galvano operation command signal 14 to the galvano scanner 6 according to the machining program.
- FIG. 3C shows a time chart of the galvano operation command signal 14.
- a time t4 fourth time point
- a predetermined galvano operation waiting time TG has elapsed from the time t2, which is the final stage of the laser pulse output command signal 11.
- the warning signal output unit 98 outputs a warning signal 15 when an alarm is required.
- the warning display unit 10 that has received the warning signal 15 displays a warning to the worker.
- the alarm may be displayed on the screen as characters or graphics, or may be notified by sound. Further, it may be displayed on an operation screen without providing an independent alarm display section.
- the main software processing unit 91 controls the above components according to the machining program, and also has a timer function inside, and simultaneously performs control with the passage of time.
- FIG. 3 shows one cycle in which laser processing is performed on one processing region of the workpiece 99 with one pulse, and the processing laser light 23 is moved to the next processing region by the galvano scanner 6.
- laser processing may be performed on one processing region of the workpiece 99 with a plurality of pulses, and the processing laser light 23 may be moved to the next processing region by the processing table 8 as one cycle.
- FIG. 3 shows the last pulse in one cycle.
- the laser oscillator 2 is sufficiently warmed up as necessary, and the workpiece 99 is placed and fixed on the processing table 8 and moved to a predetermined processing area.
- the galvano scanner 6 is positioned so that the processing laser beam 23 is irradiated to a predetermined processing position P. In this state, the machining laser beam 23 is irradiated as a pulse, and the workpiece 99 is machined. An example of processing of the workpiece 99 is drilling.
- the galvano scanner 6 is positioned so that the processing laser beam 23 is irradiated to the next processing position P.
- the machining laser beam 23 is irradiated as a pulse, and the workpiece 99 is machined. By repeating the above cycle, the entire workpiece 99 is processed.
- FIG. 4 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the present embodiment.
- symbol is used and description is abbreviate
- the control unit 9 When the galvano scanner 6 is positioned so that the processing laser beam 23 is irradiated at a predetermined position, the control unit 9 outputs a laser pulse output command signal 11 to the laser oscillator 2 at time t1, and the laser pulse at time t2.
- the output command signal 11 is stopped.
- the laser pulse output command signal 11 is a pulse-like signal for turning on the laser oscillator 2 for a predetermined RF excitation pulse width TP.
- the laser oscillator 2 excites the laser medium when the laser pulse output command signal 11 is turned on.
- the energy intensity of the laser light 21 takes time to rise until it reaches the peak intensity as shown by the characteristic A (solid line part) in FIG.
- the energy change of the measurement laser beam 22 measured by the photodetector 4 is the same as the energy change of the laser beam 21 output from the laser oscillator 2.
- the rise and fall times of the laser light 21 are determined by the characteristics of the laser oscillator 2 and are on the order of several tens of microseconds for the RF-excited carbon dioxide laser used in the present embodiment. This characteristic is shown as part of the specification in catalogs and the like. As a manufacturer guarantee, it is presented with a margin, and for example, it is presented in the maximum time such as “ ⁇ 60 ⁇ s”.
- FIG. 4C is a timing chart showing the output of the galvano operation command signal 14.
- the galvano operation command signal 14 is turned on at time t4 when the galvano operation waiting time TG has elapsed from time t2 when the laser pulse output command signal 11 is turned off from on.
- the galvano operation waiting time TG is set to the maximum value of the fall time of the laser beam 21 or a time with a margin longer than the maximum value. For example, if the fall time in the specification of the laser oscillator 2 is “ ⁇ 60 ⁇ sec”, examples include 60 ⁇ sec, 80 ⁇ sec, and 100 ⁇ sec with a margin. However, if the galvano operation waiting time TG is increased, the processing time becomes longer and the processing cost increases. Therefore, it is desirable that the galvano operation waiting time TG is small within a range that does not cause machining defects.
- the following control is performed in order to prevent processing defects caused by the deterioration of the energy characteristics of the laser beam 21.
- FIG. 5 is a flowchart showing the operation of the laser processing apparatus 1 according to the present embodiment.
- the flowchart shown in FIG. 5 mainly describes the operation of the control unit 9.
- the galvano scanner 6 is positioned so that the processing laser beam 23 is irradiated to a predetermined processing position P.
- the control unit 9 outputs a laser pulse output command signal 11 that is turned on at time t1 and turned off at time t2.
- the laser oscillator 2 starts excitation of the laser medium at time t1, outputs the laser light 21, and stops the excitation power at time t2 (S10).
- control unit 9 starts measuring time from time t2, and determines whether or not a determination time T1 preset and stored in the parameter storage unit 92 has elapsed (S11).
- the time when the determination time T1 has elapsed from time t2 is defined as time t3 (third time point).
- the control unit 9 outputs a sampling command signal 13 to the photodetector 4, and the photodetector 4 detects the detection signal 12 indicating the energy of the measurement laser beam 22 measured at time t3 when the sampling command signal 13 is received.
- the (first detection intensity) is output to the control unit 9 (S12).
- the control unit 9 compares the detection signal 12 at the time t3 with the comparison allowable value L1 (first set intensity). For example, as shown in the characteristic A (solid line part) of FIG. 4B, when the energy of the measurement laser beam 22 indicated by the detection signal 12 at time t3 is smaller than the comparison allowable value L1, the laser oscillator 2 It is determined that the oscillation of the laser beam 21 is normal. As shown in the characteristic B (broken line part) of FIG. 4B, when the energy of the measurement laser beam 22 indicated by the detection signal 12 is larger than the comparison allowable value L1, the oscillation of the laser beam 21 by the laser oscillator 2 is performed. Is determined to be abnormal.
- the control unit 9 When it is determined to be normal, the control unit 9 outputs the galvano operation command signal 14 at time t4 when the galvano operation waiting time TG has elapsed without transmitting the warning signal 15. If it is determined that there is an abnormality, the control unit 9 transmits a warning signal 15 to the warning display unit 10, and then outputs a galvano operation command signal 14 at time t4 when the galvano operation waiting time TG has elapsed (S13).
- FIG. 6 is a time chart showing the states of (a) a laser pulse output command signal, (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus in this modification.
- a laser pulse output command signal (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus in this modification.
- a detection signal (b) a detection signal
- symbol is abbreviate
- the control unit 9 does not transmit the warning signal 15, and the laser processing apparatus 1 continuously performs laser processing of the workpiece 99.
- the control unit 9 transmits a warning signal 15, but laser processing is performed.
- the apparatus 1 continues to perform laser processing on the workpiece 99.
- the comparative allowable value L1 which is a reference for transmitting the warning signal 15, may be set low (strict) so as not to cause a problem in laser processing in this cycle. Thereby, the galvano operation waiting time TG can be reduced, and the tact time can be shortened, so that productivity is improved. Further, the warning signal 15 indicates that the operator has deteriorated the falling characteristics of the laser oscillator 2.
- FIG. 7 is a time chart showing the states of (a) a laser pulse output command signal, (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus in this modification.
- a laser pulse output command signal (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus in this modification.
- FIG. 8 is a flowchart showing the operation of the laser processing apparatus 1 in this modification.
- the difference between this modification and the first embodiment is that the galvano scanner 6 stops its operation when a warning signal 15 is transmitted, as shown in FIG. 7C and S14 in FIG. .
- the control unit 9 does not transmit the warning signal 15, and the laser processing apparatus 1 continuously performs laser processing of the workpiece 99.
- the control unit 9 transmits a warning signal 15 and further performs a galvano operation. Even at the time t4 when the waiting time TG elapses, the galvano operation command signal 14 is not output and the galvano scanner 6 is stopped (S14). Along with this, the laser oscillator 2 is also stopped.
- the comparative allowable value L1 serving as a reference for transmitting the warning signal 15 is set as high as to cause a problem in laser processing in this cycle.
- the galvano scanner 6 is not driven in a state where the fall of the machining laser beam 23 is insufficient, machining defects can be prevented.
- the warning signal 15 allows the operator to know that the laser oscillator 2 has stopped.
- the comparison allowable value L1 can be set large, the warning signal 15 which does not have a problem in laser processing is not transmitted.
- FIG. 9 is a time chart showing the states of (a) a laser pulse output command signal, (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus in this modification.
- a laser pulse output command signal a laser pulse output command signal
- a detection signal a detection signal
- symbol a galvano operation command signal of the laser processing apparatus in this modification.
- FIG. 8 used for the modification 2 is also a flowchart showing the operation of the laser processing apparatus 1 according to this modification.
- description is abbreviate
- the difference between the present modification and the first modification of the first embodiment is that the galvano scanner 6 stops operating when a warning signal 15 is transmitted, as shown in FIG. 9C and S14 in FIG. It is a point to do.
- the common point between the present modification and the first modification of the first embodiment is that the determination time T1 and the galvano operation waiting time TG are simultaneous as shown in FIG. That is, time t3 and time t4 are simultaneous.
- the control unit 9 does not transmit the warning signal 15, and the laser processing apparatus 1 continuously performs laser processing of the workpiece 99.
- the control unit 9 transmits a warning signal 15 and generates a galvano operation command.
- the signal 14 is not output and the galvano scanner 6 is stopped. Along with this, the laser oscillator 2 is also stopped.
- the comparative allowable value L1 that is a reference for transmitting the warning signal 15 may be set high enough to cause a problem in laser processing in this cycle.
- the time t3 and the time t4 are almost the same, the time t4 is delayed from the time t3 by the calculation time for receiving the detection signal 12 by the control unit 9 and comparing with the comparison allowable value L1. This time is at the nanosecond level and is defined as “simultaneous” in this disclosure.
- the galvano scanner 6 is not driven in a state where the falling of the processing laser beam 23 is insufficient, processing defects can be prevented. Further, the warning signal 15 allows the operator to know that the laser oscillator 2 has stopped. In ordinary laser processing, the galvano operation waiting time TG can be reduced, and the tact time can be shortened, so that productivity is improved.
- the first determination method is a method using the maximum value of the fall time presented as the specification of the laser oscillator.
- the characteristics presented in the specifications are often somewhat superior.
- a margin is provided for the maximum value to be guaranteed in consideration of variations between models. Therefore, if the characteristics deteriorate to such an extent that the margin disappears, the possibility of occurrence of a defect has occurred, and is subject to warning.
- the comparison allowable value L1 is set to the value of the detection signal 12 corresponding to 5% of the peak energy, and the determination time T1 Is set to the guaranteed value of 50 ⁇ sec.
- the determination time T1 Is set to the guaranteed value of 50 ⁇ sec.
- the second determination method is a method of receiving the detection signal 12 simultaneously with the galvano operation waiting time TG. If the galvano scanner 6 is driven in a state where the energy of the laser beam 21 is not sufficiently lowered, a processing defect occurs. However, the energy of the processing laser beam 23 that does not cause processing defects does not have to be completely zero, but has a limit value. This limit value is determined by the material of the workpiece 99 and the like. The value of the detection signal 12 indicating the energy of the measurement laser beam 22 having a margin slightly from the limit value is set as a comparison allowable value L1, and the determination time T1 and the galvano operation waiting time TG are made the same.
- the warning signal 15 is not output, the energy of the machining laser beam 23 does not cause a machining defect when the galvano scanner 6 starts to operate. It is within the limit value.
- the warning signal 15 is output, there is a possibility that processing failure may occur if laser processing is continued. Therefore, the operator may immediately stop the laser processing apparatus 1 and perform maintenance.
- the third method is to determine whether or not the galvano scanner 6 is in an abnormal state before starting operation.
- the comparison allowable value L1 is a value of the detection signal 12 corresponding to the limit value of the energy of the processing laser beam 23 that does not become defective even when the galvano scanner 6 operates.
- the galvano operation waiting time TG is set to be longer than the determination time T1.
- the energy of the laser beam 21 is further lowered by the amount that the galvano operation waiting time TG is longer than the determination time T1, even when it is determined that the falling characteristic is abnormal, the operator performs laser processing as soon as possible. If interrupted, processing defects of the workpiece 99 can be prevented in advance.
- FIG. 10 is a time chart showing the states of (a) a laser pulse output command signal, (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus according to this modification.
- a laser pulse output command signal (b) a detection signal, and (c) a galvano operation command signal of the laser processing apparatus according to this modification.
- FIG. 11 is a flowchart which shows operation
- description is abbreviate
- the difference between the first embodiment and its modifications 1 to 3 and the present modification is that, as shown in FIGS. 10B and 10C and S15 of FIG.
- the determination time T2 and the comparison allowable value L2 are stored as parameters.
- the control unit 9 does not transmit the warning signal 15 because the comparison allowable value L1 is not reached. Further, at the time t6 (sixth time point) when the determination time T2 longer than the determination time T1 has elapsed, the control unit 9 transmits the galvano operation command signal 14 because it is below the comparison allowable value L2. As a result, the galvano scanner 6 operates at time t4. This is control of laser processing when the falling characteristic of the laser beam 21 is normal.
- the control unit 9 transmits a warning signal 15 because the comparison allowable value L1 is exceeded at the time t3 when the determination time T1 has elapsed. Since the comparison allowable value L2 is exceeded at time t6 when the determination time T2 longer than the determination time T1 has elapsed, the control unit 9 performs a galvano operation command signal as indicated by a broken line in FIG. 14 is not transmitted and the galvano scanner 6 does not operate. This is control of laser processing when the falling characteristic of the laser beam 21 is abnormal. In this case, the warning signal 15 is not transmitted and the galvano scanner 6 stops (S15).
- the control unit 9 If the comparison allowable value L1 is exceeded at the time t3 when the determination time T1 has elapsed and the comparison allowable value L2 is below the comparison allowable value L2 at the time t6 when the determination time T2 has elapsed, the control unit 9 outputs only the warning signal 15. The galvano scanner 6 continues to operate. In this way, the laser oscillator 2 can be prepared for maintenance before the laser processing apparatus 1 is stopped.
- the value of the detection signal 12 has been described as an example in which the detection signal 12 is used only once at the times t3 and t6 when the determination times T1 and T2 have elapsed.
- a plurality of sampling command signals 13 may be output so as to include the times t3 and t6, the values of the detection signals 12 received a plurality of times may be averaged, and the average value may be used as the value of the detection signals 12.
- a plurality of detection signals 12 are received during a period whose final timing is time t3 when the determination time T1 has elapsed. Specifically, a method of receiving the detection signal 12 a total of 11 times every 1 ⁇ sec from 10 ⁇ sec before the time t3 may be performed. Alternatively, the plurality of detection signals 12 are received during a period having the time t3 as the central timing. Specifically, a method of receiving the detection signal 12 a total of 11 times every 1 ⁇ sec from 5 ⁇ sec before the time t3 to 5 ⁇ sec later can be adopted.
- the number of times that the detection signal 12 becomes greater than the comparison allowable value L1 may be counted, and the abnormality may be determined when the predetermined number of times is exceeded. That is, laser processing abnormality may be determined across a plurality of processing cycles. Also in this case, it is possible to prevent erroneous determination due to variations in measured values due to disturbances and the like.
- the detection signal 12 becomes larger than the comparison allowable value L1
- movement of the laser processing apparatus 1 when the predetermined frequency is exceeded can also be taken. That is, the stop of the operation of the laser processing apparatus 1 may be determined across a plurality of processing cycles. Also in this case, it is possible to prevent the influence of erroneous determination due to variations in measured values due to disturbances or the like.
- the output of the sampling command signal 13 and the reception of the detection signal 12 are not limited to the comparison / determination timing, and may be performed at a predetermined period after the laser processing apparatus 1 has been operated for a certain period. In this case, since the detection signal 12 is constantly received, the comparison / determination may be performed using the value of the detection signal 12 at a predetermined timing.
- Embodiment 2 A second embodiment of the laser processing apparatus of the present disclosure will be described with reference to FIGS. 12 and 13. Points that overlap with the description of Embodiment 1 and Modifications 1 to 4 are simplified or omitted, and different portions will be described. Further, the same reference numerals are assigned to the same components.
- FIGS. 1 to 3 showing the configuration are the same as those in the first embodiment.
- the control in laser processing, particularly the operation of the control unit 9 is different.
- FIG. 12 is a time chart showing the states of (a) laser pulse output command signal, (b) detection signal, and (c) galvano operation command signal of the laser processing apparatus according to the present embodiment.
- FIG. 13 is a flowchart showing the operation of the laser processing apparatus according to the present embodiment. In particular, the flowchart shown in FIG. 5 mainly describes the operation of the control unit 9.
- a laser pulse output command signal 11 is output from the control unit 9 (S20). This is the same as (a) in FIGS. 3 and 4 described in the first embodiment and S10 in FIG.
- the control unit 9 starts measuring time from time t2, and determines whether or not the sampling period TS set in advance and stored in the parameter storage unit 92 has elapsed (S21).
- the control unit 9 When the sampling period TS elapses, the control unit 9 outputs a sampling command signal 13 to the photodetector 4, and the photodetector 4 calculates the energy of the measurement laser beam 22 measured at the timing when the sampling command signal 13 is received.
- the detection signal 12 shown is output (S22).
- the sampling period TS is an interval at which a transitional change in the fall of the laser pulse output can be measured. For example, if the fall time of the laser pulse is several tens of microseconds, it is about 1 microsecond.
- the control unit 9 compares the detection signal 12 with the allowable allowable value L3 set and stored in advance.
- the permissible operable value L3 is set to a value corresponding to the energy of the processing laser beam 23 that does not cause processing defects due to laser processing even when the galvano scanner 6 operates. Specifically, it is set to a value corresponding to one energy of 1% to 3% of the peak energy depending on the material of the workpiece 99.
- the detection signal 12 is received again after waiting for the sampling period TS, Make a comparison. This sampling of the detection signal 12 is repeated until the value of the detection signal 12 becomes equal to or less than the operable allowable value L3.
- the control unit 9 outputs the galvano operation command signal 14 (S23a). As shown in the characteristic A (solid line part) in FIG. 12B, time t7 corresponds to the timing when the value of the detection signal 12 falls below the operable allowable value L3 for the first time.
- the control unit 9 turns on the galvano operation command signal 14 at time t8 (eighth time) after time t7.
- time t8 is described at the same time as the time t7, but the time t8 may be after the time t7.
- the operation of the laser processing apparatus 1 when the characteristics of the laser beam 21 from the laser oscillator 2 change, particularly when the energy falling characteristics of the laser beam 21 are significantly deteriorated will be described.
- the characteristic B (broken line) in FIG. 12B when the falling characteristic of the energy of the laser beam 21 is deteriorated, it takes a long time for the detection signal 12 to become equal to or less than the operable allowable value L3. Take it.
- a determination time T2 for determining an abnormality is set in a loop that repeats reception of the detection signal 12 at the sampling period TS.
- the control unit 9 If the detection signal 12 does not fall below the allowable operating value L3 even at time t9 (the ninth time) when the determination time T2 has elapsed from time t7, it is determined that an abnormality has occurred in the laser oscillator 2. In this case, the control unit 9 outputs a warning signal 15 to the warning display unit 10 (S23b). The time when the warning signal 15 is transmitted to the warning display unit 10 is defined as a tenth time point. Further, as indicated by a broken line in FIG. 12C, the control unit 9 stops driving the entire laser processing apparatus 1 including the laser oscillator 2 without outputting the galvano operation command signal 14.
- the determination time T2 may be set to be long, the laser processing takes a long time. Therefore, it may be set to a time at which it can be determined that the falling characteristic of the laser light 21 by the laser oscillator 2 has deteriorated. For example, since the galvano operation waiting time TG is set as a time when no failure occurs unless the falling characteristic of the laser beam 21 is deteriorated, the determination time T2 may be set to the same level as the galvano operation waiting time TG.
- the detection signal 12 received for each sampling period TS is compared with the allowable operation value L3.
- the value calculated from the detection signal 12 received a plurality of times is compared with the allowable operation value L3. Also good.
- the output of the sampling command signal 13 and the reception of the detection signal 12 at the sampling period TS are not necessarily started from the time t2 when the laser pulse output command signal 11 is turned off, and the laser processing apparatus 1 operates. You may start when a certain amount of time has passed.
- the configuration in which the spectroscope 3 is provided between the laser oscillator 2 and the optical adjustment unit 5 has been described with reference to FIG. Thereby, the state of the laser beam 21 before the profile and the light amount are adjusted by the optical adjustment unit 5 can be detected, and the deterioration of the output characteristics of the laser beam 21 from the laser oscillator 2 can be directly determined.
- FIG. 14 is a perspective view showing a schematic configuration of another laser processing apparatus of the present disclosure.
- an optical adjustment unit may be provided between the spectrometer 3 and the laser oscillator 2.
- the profile and the light amount are already adjusted by the optical adjustment unit 5, the state of the laser light 21 closer to the galvano scanner 6 can be detected, and the characteristics of the laser light 21 contributing to laser processing can be determined.
- the parameter to be compared with the detection signal 12 is that of the laser light 21 used for laser processing after passing through the optical adjustment unit 5. It is set according to the intensity.
- the laser processing apparatus can monitor the deterioration of the falling characteristics of the energy of the laser pulse and warn or prevent the occurrence of defects in the laser processing, and performs drilling or the like on the substrate using a laser. This is useful in a laser processing apparatus or the like.
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Abstract
Description
<レーザ加工装置1の構成>
図1は、本実施の形態に係るレーザ加工装置1の概略構成を示す斜視図である。図1に示すように、レーザ加工装置1は、レーザ発振器2と、分光器3と、光検出器4と、光学調整部5と、ガルバノスキャナ6と、集光レンズ7と、加工テーブル8と、制御部9と、警告表示部10とを有している。ガルバノスキャナ6と集光レンズ7とをまとめて照射部とする。
制御部9は、少なくともレーザ発振器2、光検出器4及びガルバノスキャナ6に接続され、レーザ発振器2、光検出器4およびガルバノスキャナ6を制御する。
以上のように構成された本開示のレーザ加工装置の動作について図4、図5を用いて説明する。
次に、図6を用いて、実施の形態1の変形例1について説明する。図6は、本変形例におけるレーザ加工装置の(a)レーザパルス出力指令信号、(b)検出信号および(c)ガルバノ動作指令信号の状態を示すタイムチャートである。図4と同じ構成については同じ符号を用いて説明を省略する。
次に、図7、8を用いて、実施の形態1の変形例2について説明する。図7は、本変形例におけるレーザ加工装置の(a)レーザパルス出力指令信号、(b)検出信号および(c)ガルバノ動作指令信号の状態を示すタイムチャートである。図4と同じ構成については同じ符号を用いて説明を省略する。また、図8は、本変形例におけるレーザ加工装置1の動作を示すフローチャートである。図5と同じ構成については同じ符号を用いて説明を省略する。
次に、図9を用いて、実施の形態1の変形例3について説明する。図9は、本変形例におけるレーザ加工装置の(a)レーザパルス出力指令信号、(b)検出信号および(c)ガルバノ動作指令信号の状態を示すタイムチャートである。図6と同じ構成については同じ符号を用いて説明を省略する。また、変形例2に用いた図8は、本変形例におけるレーザ加工装置1の動作を示すフローチャートでもある。図5と同じ構成については同じ符号を用いて説明を省略する。
前述のように、本開示においては、実施の形態1およびその変形例1~3のような制御が可能である。そして、それぞれにおいて、判定時間T1、ガルバノ動作待ち時間TG、および、比較許容値L1の設定が重要となる。ここで、ガルバノ動作待ち時間TGと比較許容値L1の決定方法をいくつが例示する。
なお、上述の第1から第3の比較方法と処置を組み合わせることもできる。例えば、第1の比較方法で警告を行うが加工は続け、第2の比較方法で異常と判断された場合には警告だけでなくレーザ加工装置1を停止させることができる。
本開示のレーザ加工装置の第2の実施形態について、図12および図13を用いて説明する。実施の形態1および変形例1~4と説明が重複する点については簡略化、あるいは省略し、異なる箇所について説明するものとする。また、符号については同一構成については同一の番号を付している。
以下説明する動作は、加工物99の加工の内、1つのレーザパルスで1つの加工領域のレーザ加工を行う1サイクル分である。
2 レーザ発振器
3 分光器
4 光検出器
5 光学調整部
6 ガルバノスキャナ
7 集光レンズ
8 加工テーブル
9 制御部
10 警告表示部
11 レーザパルス出力指令信号
12 検出信号
13 サンプリング指令信号
14 ガルバノ動作指令信号
15 警告信号
21 レーザ光
22 測定レーザ光
23 加工レーザ光
61 ガルバノコントローラ
62,64 モータ
63,65 ガルバノミラー
91 メインソフト処理部
92 パラメータ記憶部
93 レーザ出力指令部
94 サンプリング指令部
95 検知レベル受信部
96 比較部
97 ガルバノ指令部
98 警告信号出力部
99 加工物
P 加工位置
r レーザ
ra 判定用レーザ
t,t1,t2,t3,t4,t6,t7,t8,t9 時刻
L1,L2 比較許容値
L3 動作可能許容値
P1,P2 レーザパルス
T1,T2 判定時間
TG ガルバノ動作待ち時間
TP 励起パルス幅
TS サンプリング周期
V1,V2 最大電圧値
Vx 基準値
100 レーザ加工装置
101 レーザ発振器
102 ビームスプリッタ
103 光検出器
104 カウンタ
105 メインコントローラ
106 表示器
Claims (11)
- レーザ光を出力するレーザ発振器と、
前記レーザ光が入射され、前記レーザ光を加工レーザ光と測定レーザ光とに分離して出射する分光器と、
前記測定レーザ光が入射され、前記測定レーザ光の強度を示す検出信号を発信する光検出器と、
前記加工レーザ光が入射され、前記加工レーザ光を加工物に照射する照射部と、
前記レーザ発振器と前記光検出器と前記照射部とに接続された制御部とを備え、
前記制御部は、
第1の時点に前記レーザ光の出力を開始し、前記第1の時点よりも後の第2の時点に前記レーザ光の出力を停止する出力信号を前記レーザ発振器に発信し、
前記第2の時点よりも後である第3の時点に、第1の設定強度よりも大きい第1の検出強度を示す検出信号を前記光検出器から受信し、
前記第3の時点以降の第4の時点に、前記照射部の駆動を制御する駆動信号を前記照射部に発信し、
前記第3の時点以降の第5の時点に、警告信号を発信するレーザ加工装置。 - 前記第3の時点と前記第4の時点とが同時であり、
前記駆動信号は前記照射部を動作させる信号である請求項1に記載のレーザ加工装置。 - 前記第4の時点は、前記第3の時点よりも後であり、
前記駆動信号は前記照射部の停止を継続させる信号である請求項1に記載のレーザ加工装置。 - 前記第4の時点は、前記第3の時点よりも後であり、
前記制御部は、
前記第3の時点よりも後で、かつ、前記第4の時点以前の第6の時点に、第2の検出強度を示す検出信号を前記光検出器から受信する請求項1に記載のレーザ加工装置。 - 前記第2の検出強度は、第2の設定強度よりも小さく、
前記駆動信号は前記照射部を動作させる信号である請求項4に記載のレーザ加工装置。 - 前記第4の時点と前記第6の時点とが同時である請求項5に記載のレーザ加工装置。
- 前記第6の時点は、前記第4の時点よりも前であり、
前記第2の検出強度は、第2の設定強度よりも大きく、
前記駆動信号は前記照射部の停止を継続させる信号である請求項4に記載のレーザ加工装置。 - レーザ光を出力するレーザ発振器と、
前記レーザ光が入射され、前記レーザ光を加工レーザ光と測定レーザ光とに分離して出射する分光器と、
前記測定レーザ光が入射され、前記測定レーザ光の強度を示す検出信号を発信する光検出器と、
前記加工レーザ光が入射され、前記加工レーザ光を加工物に照射する照射部と、
前記レーザ発振器と前記光検出器と前記照射部とに接続された制御部とを備え、
前記制御部は、
第1の時点に前記レーザ光の出力を開始し、前記第1の時点よりも後の第2の時点に前記レーザ光の出力を停止する出力信号を前記レーザ発振器に発信し、
前記第2の時点以降は、前記検出信号を周期的に前記光検出器から受信し、
前記第2の時点よりも後である第7の時点に、第3の設定強度よりも小さい第3の検出強度を示す検出信号を前記光検出器から受信し、
前記第7の時点以降の第8の時点に、前記照射部を動作させる駆動信号を前記照射部に発信するレーザ加工装置。 - 前記制御部は、
前記第7の時点から所定時間が経過した第9の時点に、第4の設定強度よりも大きい第4の検出強度を示す検出信号を前記光検出器から受信し、
前記第9の時点以降の第10の時点に、警告信号を発信する請求項8に記載のレーザ加工装置。 - 前記レーザ発振器と前記分光器との間に設けられ、前記レーザ光を調整する光学調整部をさらに備えた請求項1から9のいずれかに記載のレーザ加工装置。
- 前記分光器と前記照射部との間に設けられ、前記加工レーザ光を調整する光学調整部をさらに備えた請求項1から9のいずれかに記載のレーザ加工装置。
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- 2015-02-18 US US15/113,782 patent/US20170008128A1/en not_active Abandoned
- 2015-02-18 JP JP2016503976A patent/JPWO2015125472A1/ja active Pending
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Also Published As
Publication number | Publication date |
---|---|
CN106029289B (zh) | 2017-09-01 |
JPWO2015125472A1 (ja) | 2017-03-30 |
US20170008128A1 (en) | 2017-01-12 |
EP3108992A4 (en) | 2017-04-05 |
CN106029289A (zh) | 2016-10-12 |
TW201544222A (zh) | 2015-12-01 |
EP3108992A1 (en) | 2016-12-28 |
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