CN102637012B - Double-path power negative feedback system for laser processing equipment - Google Patents
Double-path power negative feedback system for laser processing equipment Download PDFInfo
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- CN102637012B CN102637012B CN 201210096035 CN201210096035A CN102637012B CN 102637012 B CN102637012 B CN 102637012B CN 201210096035 CN201210096035 CN 201210096035 CN 201210096035 A CN201210096035 A CN 201210096035A CN 102637012 B CN102637012 B CN 102637012B
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
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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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
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- 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
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- Laser Beam Processing (AREA)
Abstract
The invention discloses a double-path power negative feedback system for laser processing equipment. A processing point laser output power detecting circuit is arranged on processing points on the basis of existing power negative feedback of an existing laser device, an input end of the processing point laser output power detecting circuit is connected with an output end of a laser emergence unit by a spectroscopic coupling lens, an output end of the processing point laser output power detecting circuit is respectively connected with a negative feedback control circuit with a feedback switching function and a laser electric-power control circuit and used for detecting laser output power of at least one processing point in real time, negative feedback of the laser output power is fed back to a control end of a laser electric-power control component in real time, double-path power negative feedback is realized, accordingly, the level of laser output power is controlled, laser output stability and laser power control precision can be remarkably improved, laser processing quality is obviously enhanced, and the problem that a single power negative feedback closed-loop control system of existing laser processing equipment does not comprise a laser incidence unit in an output optical fiber coupling transmission system, an optical fiber and a laser emergence unit so that output power is unstable is solved.
Description
Technical field
The present invention relates to Laser Processing, particularly relate to a kind of power of the two-way for laser process equipment degeneration factor.
Background technology
Existing laser process equipment is provided with laser power detection device at the output terminal of laser cavity mostly, the real-time negative feedback of the laser power that it is detected to control the size of Laser output, and then improves the stability of Laser output to the control end of Laser Power Devices control assembly.Because this laser power negative feedback closed loop control system does not comprise that laser mirror is to laser incident unit, optical fiber and laser emitting unit in the output optical fibre coupled transmission system between Laser Processing point, and these parts the method that there is no occurs damaging and judge, therefore, seriously restricted the raising of processing stand Laser output stability.
Summary of the invention
Technical matters to be solved by this invention is the defect that makes up above-mentioned prior art, and a kind of power of the two-way for laser process equipment degeneration factor is provided.
Technical matters of the present invention is solved by the following technical programs.
This power of the two-way for laser process equipment degeneration factor, comprise by laser instrument, be arranged on the laser output power testing circuit of laser output, negative feedback control circuit, and the closed loop negative feedback system that connects to form successively of control circuit for laser power device, described laser output power testing circuit also is connected with control circuit for laser power device, described negative feedback control circuit is the negative feedback control circuit with feedback handoff functionality, its feedback signal output terminal is connected with the feedback signal input end of the control of discharge unit of described control circuit for laser power device, its second input end is connected with the output terminal of described laser output power testing circuit, described control circuit for laser power device comprises Laser Power Devices, the CPU be connected with described Laser Power Devices respectively and control of discharge unit, described CPU is that control end is connected with the 3rd input end of described control of discharge unit and negative feedback control circuit respectively, the 4th input end of the output terminal of described control of discharge unit and negative feedback control circuit is connected, the output terminal of described laser instrument also is connected with laser incident unit in turn, optical fiber and laser emitting unit, by laser incident unit, optical fiber and laser emitting unit are processed operation by the Laser Transmission of laser instrument output to the Laser Processing point.
The characteristics of this power of the two-way for laser process equipment degeneration factor are:
Be provided with processing stand laser output power testing circuit at the Laser Processing point, the output terminal of the input end of described processing stand laser output power testing circuit and described laser emitting unit is connected by the light splitting eyeglass that is coupled, the output terminal of described processing stand laser output power testing circuit is connected with described control circuit for laser power device with first input end of described negative feedback control circuit respectively, for detecting in real time the laser output power of at least one processing stand.
The CPU of described control circuit for laser power device automatically controls and connects or select to control the output terminal of the described processing stand laser output power testing circuit of connection or the output terminal of described laser output power testing circuit according to the user, and a wherein road power negative-feedback circuit job is connected in switching.
Technical matters of the present invention is solved by following further technical scheme.
Described CPU controls the output terminal of the described processing stand laser output power testing circuit of connection or the output terminal of described laser output power testing circuit automatically, comprises the following steps:
1) analog/digital converter of laser power signal in described CPU that described processing stand laser output power testing circuit and described laser output power testing circuit are exported respectively is converted to corresponding front and back two ways of digital signals;
2) the front and back two ways of digital signals that the integrator in described CPU is changed step 1) integral operation in real time simultaneously respectively goes out corresponding former and later two real-time integration numerical value;
3) comparison program in described CPU is to step 2) former and later two real-time integration numerical value compare;
4) transmit control signal and control negative feedback control circuit and carry out the switching of negative feedback state according to the comparative result of step 3) by described CPU:
When if rear integration numerical value surpasses front individual integration setting value value in real time in real time, be that laser power surpasses the processing stand laser power settings, show that the processing stand laser output power occurs abnormal, described CPU transmits control signal and controls the output terminal that electronic switch in negative feedback control circuit is connected described laser device laser ouput power detection circuit, the work of laser power negative-feedback circuit is connected in switching, and show in laser power negative feedback state on peripheral display interface, obviously to reduce the Laser Processing fraction defective, laser incident unit in while output optical fibre coupled transmission system, the warning message that optical fiber and laser emitting unit break down, remind the relevant personnel to confirm, to avoid due to laser incident unit, when optical fiber and laser emitting unit damage, cause laser power system to drop into excessive, and then the power supply of damage laser process equipment,
When if rear integration numerical value surpasses front individual integration setting value value in real time in real time, be that laser power does not surpass the processing stand laser power settings, show that the processing stand laser output power is normal, described CPU transmits control signal and makes electronic switch in negative feedback control circuit connect the output terminal of described processing stand laser output power testing circuit, the work of processing stand laser power negative-feedback circuit is connected in switching, and shows in processing stand power negative feedback state on peripheral display interface.
Described rear integration numerical value in real time surpasses front the setting value of integration numerical value in real time, by the fade performance of the eyeglass of the eyeglass of the optical fiber adopted, laser incident unit and laser emitting unit, is determined.
Preferably, the setting value that described rear real-time integration numerical value surpasses front real-time integration numerical value is 5%～20%.
Technical matters of the present invention is solved by following further technical scheme.
Described processing stand laser output power testing circuit is photoelectric commutator, current-to-voltage converting circuit and the voltage amplifier circuit be connected successively with the same composition of described laser output power testing circuit, is respectively used to convert the laser signal of processing stand and laser instrument output to voltage signal proportional to laser power.
Described processing stand laser output power testing circuit also comprises with described laser output power testing circuit the constant temperature control circuit be connected with photoelectric commutator, for the minizone temperature constant, control, make electrooptical device all the time in fixing temperature range, guarantee the accuracy of opto-electronic conversion.
Described processing stand laser output power testing circuit also is provided with the shaping amplification circuit that input end is connected with the output terminal of described voltage amplifier circuit, carry out the shaping amplification for the voltage signal by the output of processing stand voltage amplifier circuit, to improve the interference free performance of power degeneration factor.
Be provided with the potentiometer of adjusting signal amplification factor in the current-to-voltage converting circuit of described processing stand laser output power testing circuit, for regulating the intensity of light signal.
Described negative feedback control circuit comprises the supercircuit of two-way processing signals, the road electric discharge that the integrating circuit that one route connects successively and sample circuit form drives signal processing circuit, and another road processing stand and the laser device laser output power detection signal treatment circuit that by the logic gate commutation circuit connected successively and ratio amplifying circuit, are formed, described logic gate commutation circuit comprises the first phase inverter, the second phase inverter, the first electronic switch and the second electronic switch, the controlled end of the first electronic switch and the second electronic switch respectively with described the first phase inverter, the output terminal of the second phase inverter connects, two input ends of described logic gate commutation circuit are the input end of the second electronic switch input end and the first electronic switch, respectively with described processing stand laser output power testing circuit, the output terminal of described laser output power testing circuit connects, the 3rd input end i.e. input end of the first phase inverter is connected with the CPU of described control circuit for laser power device, automatically of connecting or selecting to control in the second electronic switch and the first electronic switch according to the user who is controlled in the second electronic switch and the first electronic switch by CPU connects the output terminal of described processing stand laser output power testing circuit or the output terminal of described laser output power testing circuit, a wherein road power negative-feedback circuit job is connected in switching, two input ends of described supercircuit are connected with the output terminal of described ratio amplifying circuit with the output terminal of described sample circuit respectively, the output terminal of described supercircuit is connected with described control of discharge unit, the output negative feedback control signal is to described control of discharge unit.
Described CPU comprises high speed digital signal processor (Digital Signal Processor, initialism is DSP) CPU, its peripheral circuit comprises input and output (I/O) interface, demonstration and input-output unit and storage unit, described CPU processes for the data of whole laser process equipment and system is controlled, and the switching controls of negative feedback control circuit.
Described control of discharge unit comprises width modulation (the Pulse Width Modulation connected successively, initialism is PWM) circuit and driving circuit, two input ends of described pwm circuit are connected with the output terminal of the supercircuit of described negative feedback control circuit and the laser power reference signal output terminal of described CPU respectively, the output terminal of described driving circuit is connected with the driving signal input of described Laser Power Devices, pwm circuit is delivered to respectively for the laser power reference signal of the processing request by CPU output and the feedback signal of described negative feedback control circuit in described control of discharge unit, generate pwm signal, again described pwm signal is inputted to described driving circuit, the large current signal of the switching device of generation in can the driving laser power supply, described Laser Power Devices provide controllable electric energy to described laser instrument, described laser instrument is converted to laser energy by described controllable electric energy, by laser incident unit, optical fiber and laser emitting unit are processed operation by the Laser Transmission of laser instrument output to processing stand.
Described laser emitting unit comprises housing, Optical fiber plug on housing, carry over the laser alignment eyeglass that main optical path is arranged in housing, 45 ° of transmission eyeglasses, laser focusing lens and laser radiation glass, and carry over the visible filter of being arranged by a transmitted light path of 45 ° of transmission eyeglasses, laser filter sheet and detection light focusing lens, the back of described detection light focusing lens is the printed circuit board (PCB) (PrintedCircuitBoard that described processing stand laser output power testing circuit is installed, initialism is PCB), device on described printing board PCB comprises the potentiometer in photoelectric sensor and current-to-voltage converting circuit.
The present invention's beneficial effect compared with prior art is:
The present invention is on the degenerative basis of existing laser power, be provided with processing stand laser output power testing circuit at processing stand, and the control end to the Laser Power Devices control assembly by its negative feedback in real time, realize the negative feedback of two-way power, to control the size of laser output power, can significantly improve Laser output stability and laser power control precision, obviously improve the Laser Processing quality, the single power negative feedback closed loop control system that efficiently solves existing laser process equipment does not comprise the laser incident unit in the output optical fibre coupled transmission system, optical fiber and laser emitting unit and the unsettled problem of output power that causes.
The accompanying drawing explanation
Fig. 1 is the compositional block diagram of the specific embodiment of the invention;
Fig. 2 is the compositional block diagram of the laser output power testing circuit in Fig. 1;
Fig. 3 is the compositional block diagram of the processing stand laser output power testing circuit in Fig. 1;
Fig. 4 is the charge/discharge control circuit block diagram in Fig. 1;
Fig. 5 is the FEEDBACK CONTROL commutation circuit block diagram in Fig. 1;
Fig. 6 is laser emitting cellular construction sectional view in Fig. 1.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of power of the two-way for laser-beam welding machine degeneration factor as shown in Fig. 1～6, comprise by laser instrument 2, be arranged on the laser output power testing circuit 10 of laser instrument 2 output terminals, negative feedback control circuit 9, and the closed loop negative feedback system that connects to form successively of control circuit for laser power device, laser output power testing circuit 10 also is connected with control circuit for laser power device, control circuit for laser power device comprises Laser Power Devices 1, the CPU12 be connected with Laser Power Devices 1 respectively and control of discharge unit 11, CPU12 is the CPU that comprises high-speed dsp, its peripheral circuit comprises input and output (I/O) interface 15, show and input-output unit 14 and storage unit 13, CPU12 processes for the data of whole laser process equipment and system is controlled, and the switching controls of negative feedback control circuit 9.CPU12 is connected with negative feedback control circuit 9 with control of discharge unit 11 respectively, and control of discharge unit 11 is connected with negative feedback control circuit 9.The output terminal of laser instrument 2 also is connected with laser incident unit 3, optical fiber 4 and laser emitting unit 5 in turn, by laser incident unit 3, optical fiber 4 and laser emitting unit 5, the Laser Transmission of laser instrument 2 outputs is processed to operation to processing stand 8.
Control of discharge unit 11 comprises pwm circuit 24 and the driving circuit 25 connected successively, two input ends of pwm circuit 24 are connected with the output terminal of the supercircuit 22 of negative feedback control circuit 9 and the laser power reference signal output terminal of CPU12 respectively, the output terminal of driving circuit 25 is connected with the driving signal input of Laser Power Devices 1, pwm circuit 24 is delivered to respectively for the laser power reference signal of the processing request by CPU12 output and the feedback signal of negative feedback control circuit 9 in control of discharge unit 11, generate pwm signal, again by pwm signal input driving circuit 25, the large current signal of the switching device of generation in can driving laser power supply 1, Laser Power Devices 1 provide controllable electric energy to laser instrument 2, laser instrument 2 is converted to laser energy by controllable electric energy, by laser incident unit 3, optical fiber 4 and laser emitting unit 5 are processed operation by the Laser Transmission of laser instrument 2 outputs to Laser Processing point 8.
Processing stand laser output power testing circuit 6 is arranged on Laser Processing point 8, the input end of processing stand laser output power testing circuit 6 and the output terminal of laser emitting unit 5 are connected by the light splitting eyeglass (attached not shown in FIG.) that is coupled, the output terminal of processing stand laser output power testing circuit 6 is connected with control circuit for laser power device with negative feedback control circuit 9 respectively, for detecting in real time the laser output power of at least one processing stand.
Laser output power testing circuit 10 comprises photoelectric commutator 16, current-to-voltage converting circuit 17, the voltage amplifier circuit 18 connected successively, with the constant temperature control circuit 19 be connected with photoelectric commutator 16, constant temperature control circuit 19 is controlled for the minizone temperature constant, make photoelectric commutator 16 all the time in fixing temperature range, laser output power testing circuit 10 converts voltage signal proportional to laser power to for the laser signal by laser instrument 2 outputs.
Processing stand laser output power testing circuit 6 comprise successively the photoelectric commutator 36 that connects, current-to-voltage converting circuit 17 ', voltage amplifier circuit 18 ', with the constant temperature control circuit 19 be connected with photoelectric commutator 36 ', constant temperature control circuit 19 ' control for the minizone temperature constant, make photoelectric commutator 36 all the time in fixing temperature range, processing stand laser output power testing circuit 6 converts voltage signal proportional to laser power to for the laser signal by processing stand 8 outputs.
Processing stand laser output power testing circuit 6 also be provided with input end and voltage amplifier circuit 18 ' the shaping amplification circuit 7 that is connected of output terminal, for the voltage signal of processing stand voltage amplifier circuit 18 ' output is carried out to the shaping amplification, to improve the interference free performance of power degeneration factor.
The current-to-voltage converting circuit 17 of processing stand laser output power testing circuit 6 ' in be provided with the potentiometer 37 of adjusting signal amplification factor, for regulating the intensity of light signal.
Negative feedback control circuit 9 is the negative feedback control circuits with feedback handoff functionality.Negative feedback control circuit 9 comprises the supercircuit 22 of two-way processing signals, the road electric discharge that the integrating circuit 20 that one route connects successively and sample circuit 21 form drives signal processing circuit, and another road processing stand and the laser device laser output power detection signal treatment circuit that by the logic gate commutation circuit connected successively and ratio amplifying circuit 23, are formed, the logic gate commutation circuit comprises the first phase inverter 29, the second phase inverter 28, the first electronic switch 26 and the second electronic switch 27, the controlled end of the first electronic switch 26 and the second electronic switch 27 respectively with the first phase inverter 29, the output terminal of the second phase inverter 28 connects, two input ends of logic gate commutation circuit are the input end of the second electronic switch 27 input ends and the first electronic switch 26, respectively with processing stand laser output power testing circuit 6, the output terminal of laser output power testing circuit 10 connects, the 3rd input end i.e. input end of the first phase inverter 29 is connected with the CPU12 of control circuit for laser power device, automatically of connecting or selecting to control in the second electronic switch 27 and the first electronic switch 26 according to the user who is controlled in the second electronic switch 27 and the first electronic switch 26 by CPU12 connects the output terminal of processing stand laser output power testing circuit 6 or the output terminal of laser output power testing circuit 10, a wherein road power negative-feedback circuit job is connected in switching, two input ends of supercircuit 22 are connected with the output terminal of ratio amplifying circuit 23 with the output terminal of sample circuit 21 respectively, the output terminal output negative feedback control signal of supercircuit 22 is to the pwm circuit 24 of control of discharge unit 11.
Two input ends of negative feedback control circuit 9 are connected with the output terminal of laser output power testing circuit 10 with the output terminal of processing stand laser output power testing circuit 6 respectively, its the 3rd input end is that control end is connected with the CPU of described control circuit for laser power device, its the 4th input end is connected with the output terminal of the control of discharge unit 11 of described control circuit for laser power device, the feedback signal output terminal of negative feedback control circuit 9 is connected with the feedback signal input end of the pwm circuit 24 of the control of discharge unit 11 of control circuit for laser power device, the CPU12 of control circuit for laser power device automatically controls and connects or select to control the output terminal of connection processing stand laser output power testing circuit 6 or the output terminal of laser output power testing circuit 10 according to the user, a wherein road power negative-feedback circuit job is connected in switching, comprise the following steps:
1) analog/digital converter of laser power signal in CPU12 that processing stand laser output power testing circuit 6 and laser output power testing circuit 10 are exported respectively is converted to corresponding front and back two ways of digital signals;
2) the front and back two ways of digital signals that the integrator in CPU12 is changed step 1) integral operation in real time simultaneously respectively goes out corresponding former and later two real-time integration numerical value;
3) comparison program in CPU12 is to step 2) former and later two real-time integration numerical value compare;
4) transmit control signal and control negative feedback control circuit 9 and carry out the switching of negative feedback state according to the comparative result of step 3) by CPU12:
When if rear integration numerical value surpasses front individual integration numerical value 12% in real time in real time, be that laser power surpasses processing stand laser power 12%, show that the processing stand laser output power occurs abnormal, CPU12 transmits control signal and controls the output terminal of the first electronic switch 26 connection laser device laser ouput power detection circuits 10 in negative feedback control circuit 9, the work of laser power negative-feedback circuit is connected in switching, and show in laser power negative feedback state on peripheral display interface, obviously to reduce the Laser Processing fraction defective, laser incident unit 3 in while output optical fibre coupled transmission system, the warning message that optical fiber 4 and laser emitting unit 5 break down, remind the relevant personnel to confirm, to avoid due to laser incident unit 3, when optical fiber 4 and laser emitting unit 5 damage, cause laser power system to drop into excessive, and then the power supply of damage laser process equipment,
When if rear integration numerical value surpasses front individual integration numerical value 12% in real time in real time, be that laser power does not surpass processing stand laser power 12%, show that the processing stand laser output power is normal, CPU12 transmits control signal and makes the output terminal of the second electronic switch 27 connection processing stand laser output power testing circuits 6 in negative feedback control circuit 9, the work of processing stand laser power negative-feedback circuit is connected in switching, and shows in processing stand power negative feedback state on peripheral display interface.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For the general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise some alternative or obvious modification that are equal to; and performance or purposes identical, all should be considered as belonging to the present invention's scope of patent protection definite by submitted to claims.
Claims (10)
1. the power of the two-way for a laser process equipment degeneration factor, comprise by laser instrument, be arranged on the laser output power testing circuit of laser output, negative feedback control circuit, and the closed loop negative feedback system that connects to form successively of control circuit for laser power device, described laser output power testing circuit also is connected with control circuit for laser power device, described negative feedback control circuit is the negative feedback control circuit with feedback handoff functionality, its feedback signal output terminal is connected with the feedback signal input end of the control of discharge unit of described control circuit for laser power device, its second input end is connected with the output terminal of described laser output power testing circuit, described control circuit for laser power device comprises Laser Power Devices, the CPU be connected with described Laser Power Devices respectively and control of discharge unit, described CPU is that control end is connected with the 3rd input end of described control of discharge unit and negative feedback control circuit respectively, the 4th input end of the output terminal of described control of discharge unit and negative feedback control circuit is connected, the output terminal of described laser instrument also is connected with laser incident unit in turn, optical fiber and laser emitting unit, by laser incident unit, optical fiber and laser emitting unit are processed operation by the Laser Transmission of laser instrument output to the Laser Processing point, it is characterized in that:
Be provided with processing stand laser output power testing circuit at the Laser Processing point, the output terminal of the input end of described processing stand laser output power testing circuit and described laser emitting unit is connected by the light splitting eyeglass that is coupled, the output terminal of described processing stand laser output power testing circuit is connected with described control circuit for laser power device with first input end of described negative feedback control circuit respectively, for detecting in real time the laser output power of at least one processing stand;
The CPU of described control circuit for laser power device automatically controls and connects or select to control the output terminal of the described processing stand laser output power testing circuit of connection or the output terminal of described laser output power testing circuit according to the user, and a wherein road power negative-feedback circuit job is connected in switching.
2. the power of the two-way for laser process equipment degeneration factor as claimed in claim 1 is characterized in that:
Described CPU controls the output terminal of the described processing stand laser output power testing circuit of connection or the output terminal of described laser output power testing circuit automatically, comprises the following steps:
1) analog/digital converter of laser power signal in described CPU that described processing stand laser output power testing circuit and described laser output power testing circuit are exported respectively is converted to corresponding front and back two ways of digital signals;
2) the front and back two ways of digital signals that the integrator in described CPU is changed step 1) integral operation in real time simultaneously respectively goes out corresponding former and later two real-time integration numerical value;
3) comparison program in described CPU is to step 2) former and later two real-time integration numerical value compare;
4) transmit control signal and control negative feedback control circuit and carry out the switching of negative feedback state according to the comparative result of step 3) by described CPU:
When if rear integration numerical value surpasses front individual integration setting value value in real time in real time, be that laser power surpasses the processing stand laser power settings to show that the processing stand laser output power occurs abnormal, described CPU transmits control signal and controls the output terminal that electronic switch in negative feedback control circuit is connected described laser device laser ouput power detection circuit, the work of laser power negative-feedback circuit is connected in switching, and show in laser power negative feedback state on peripheral display interface, obviously to reduce the Laser Processing fraction defective, laser incident unit in while output optical fibre coupled transmission system, the warning message that optical fiber and laser emitting unit break down, remind the relevant personnel to confirm, to avoid due to laser incident unit, when optical fiber and laser emitting unit damage, cause laser power system to drop into excessive, and then the power supply of damage laser process equipment,
When if rear integration numerical value surpasses front individual integration setting value value in real time in real time, be that laser power does not surpass the processing stand laser power settings, show that the processing stand laser output power is normal, described CPU transmits control signal and makes electronic switch in negative feedback control circuit connect the output terminal of described processing stand laser output power testing circuit, the work of processing stand laser power negative-feedback circuit is connected in switching, and shows in processing stand power negative feedback state on peripheral display interface.
3. the power of the two-way for laser process equipment degeneration factor as claimed in claim 1 or 2 is characterized in that:
Described rear integration numerical value in real time surpasses front the setting value of integration numerical value in real time, by the fade performance of the eyeglass of the eyeglass of the optical fiber adopted, laser incident unit and laser emitting unit, is determined.
4. the power of the two-way for laser process equipment degeneration factor as claimed in claim 3 is characterized in that:
Described processing stand laser output power testing circuit is photoelectric commutator, current-to-voltage converting circuit and the voltage amplifier circuit be connected successively with the same composition of described laser output power testing circuit, is respectively used to convert the laser signal of processing stand and laser instrument output to voltage signal proportional to laser power;
Described processing stand laser output power testing circuit also comprises with described laser output power testing circuit the constant temperature control circuit be connected with photoelectric commutator, for the minizone temperature constant, controls, and makes electrooptical device all the time in fixing temperature range.
5. the power of the two-way for laser process equipment degeneration factor as claimed in claim 4 is characterized in that:
Described processing stand laser output power testing circuit also is provided with the shaping amplification circuit that input end is connected with the output terminal of described voltage amplifier circuit, carry out the shaping amplification for the voltage signal by the output of processing stand voltage amplifier circuit, to improve the interference free performance of power degeneration factor.
6. the power of the two-way for laser process equipment degeneration factor as claimed in claim 5 is characterized in that:
Be provided with the potentiometer of adjusting signal amplification factor in the current-to-voltage converting circuit of described processing stand laser output power testing circuit, for regulating the intensity of light signal.
7. the power of the two-way for laser process equipment degeneration factor as claimed in claim 6 is characterized in that:
Described negative feedback control circuit comprises the supercircuit of two-way processing signals, the road electric discharge that the integrating circuit that one route connects successively and sample circuit form drives signal processing circuit, and another road processing stand and the laser device laser output power detection signal treatment circuit that by the logic gate commutation circuit connected successively and ratio amplifying circuit, are formed, described logic gate commutation circuit comprises the first phase inverter, the second phase inverter, the first electronic switch and the second electronic switch, the controlled end of the first electronic switch and the second electronic switch respectively with described the first phase inverter, the output terminal of the second phase inverter connects, two input ends of described logic gate commutation circuit are the input end of the second electronic switch input end and the first electronic switch, respectively with described processing stand laser output power testing circuit, the output terminal of described laser output power testing circuit connects, the 3rd input end i.e. input end of the first phase inverter is connected with the CPU of described control circuit for laser power device, automatically of connecting or selecting to control in the second electronic switch and the first electronic switch according to the user who is controlled in the second electronic switch and the first electronic switch by CPU connects the output terminal of described processing stand laser output power testing circuit or the output terminal of described laser output power testing circuit, a wherein road power negative-feedback circuit job is connected in switching, two input ends of described supercircuit are connected with the output terminal of described ratio amplifying circuit with the output terminal of described sample circuit respectively, the output terminal of described supercircuit is connected with described control of discharge unit, the output negative feedback control signal is to described control of discharge unit.
8. the power of the two-way for laser process equipment degeneration factor as claimed in claim 7 is characterized in that:
Described CPU is the CPU that comprises high speed digital signal processor DSP, its peripheral circuit comprises IO interface, demonstration and input-output unit and storage unit, described CPU processes for the data of whole laser process equipment and system is controlled, and the switching controls of negative feedback control circuit.
9. the power of the two-way for laser process equipment degeneration factor as claimed in claim 8 is characterized in that:
Described control of discharge unit comprises pulse-width modulation PWM circuit and the switch driving circuit connected successively, two input ends of described pwm circuit are connected with the output terminal of the supercircuit of described negative feedback control circuit and the laser power reference signal output terminal of described CPU respectively, the output terminal of described switch driving circuit is connected with the driving signal input of described Laser Power Devices, pwm circuit is delivered to respectively for the laser power reference signal of the processing request by CPU output and the feedback signal of described negative feedback control circuit in described control of discharge unit, generate pwm signal, again described pwm signal is inputted to described switch driving circuit, the large current signal of the switching device of generation in can the driving laser power supply, described Laser Power Devices provide controllable electric energy to described laser instrument, described laser instrument is converted to laser energy by described controllable electric energy, by laser incident unit, optical fiber and laser emitting unit are processed operation by the Laser Transmission of laser instrument output to processing stand.
10. the power of the two-way for laser process equipment degeneration factor as claimed in claim 9 is characterized in that:
Described laser emitting unit comprises in Optical fiber plug on housing, housing, housing and carries over laser alignment eyeglass, 45 ° of transmission eyeglasses, laser focusing lens and the laser radiation glass that main optical path is arranged; and carry over visible filter, the laser filter sheet of being arranged by a transmitted light path of 45 ° of transmission eyeglasses and detect the light focusing lens; the back of described detection light focusing lens is the printed circuit board (PCB) that described processing stand laser output power testing circuit is installed, and the device on described printed circuit board (PCB) comprises the potentiometer in photoelectric sensor and current-to-voltage converting circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210096035 CN102637012B (en) | 2012-04-01 | 2012-04-01 | Double-path power negative feedback system for laser processing equipment |
| PCT/CN2012/074355 WO2013149416A1 (en) | 2012-04-01 | 2012-04-19 | Double-path power negative feedback system for laser processing device |
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| CN 201210096035 CN102637012B (en) | 2012-04-01 | 2012-04-01 | Double-path power negative feedback system for laser processing equipment |
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| CN104105568B (en) * | 2013-02-14 | 2015-10-21 | 三菱电机株式会社 | Laser processing device, Working control device and pulse frequency control method |
| TW201636144A (en) * | 2015-04-13 | 2016-10-16 | 翊鼎光電股份有限公司 | Laser soldering device |
| CN104836099A (en) * | 2015-05-19 | 2015-08-12 | 大族激光科技产业集团股份有限公司 | Optical fiber laser system and monitoring device thereof |
| CN105955093A (en) * | 2015-07-09 | 2016-09-21 | 深圳市普达镭射科技有限公司 | YAG laser welding power supply control system having online fault diagnosis and debugging functions |
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| JP6625914B2 (en) * | 2016-03-17 | 2019-12-25 | ファナック株式会社 | Machine learning device, laser processing system and machine learning method |
| CN107357257A (en) * | 2017-06-27 | 2017-11-17 | 安徽联亚智能装备制造有限公司 | One kind Laser Processing data collection and fault diagnosis system |
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| JP7084759B2 (en) * | 2018-03-29 | 2022-06-15 | 住友重機械工業株式会社 | Laser processing equipment |
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| JP7219590B2 (en) * | 2018-10-30 | 2023-02-08 | 浜松ホトニクス株式会社 | Laser processing equipment |
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| WO2013149416A1 (en) | 2013-10-10 |
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