CN106312306A - Height adjusting system and method for laser cutting head - Google Patents
Height adjusting system and method for laser cutting head Download PDFInfo
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- CN106312306A CN106312306A CN201610915090.6A CN201610915090A CN106312306A CN 106312306 A CN106312306 A CN 106312306A CN 201610915090 A CN201610915090 A CN 201610915090A CN 106312306 A CN106312306 A CN 106312306A
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- 238000003698 laser cutting Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 84
- 230000009514 concussion Effects 0.000 claims description 38
- 238000001914 filtration Methods 0.000 claims description 32
- 238000007493 shaping process Methods 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 230000010355 oscillation Effects 0.000 abstract 2
- 238000005520 cutting process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013524 data verification Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012850 discrimination method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
-
- 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
Abstract
The invention relates to the field of laser numerical control systems, in particular to a height adjusting system for a laser cutting head. The height adjusting system comprises a sensor, a pre-amplifier, a signal conditioner and a numerical control unit, wherein the sensor is used for detecting the capacitance value between a nozzle of the laser cutting head and the surface of a machined workpiece; the pre-amplifier is used for converting the capacitance value into an oscillation frequency signal; the signal conditioner is used for processing the oscillation frequency signal to obtain a distance signal for the distance between the nozzle of the laser cutting head and the surface of the machined workpiece; and the numerical control unit is used for adjusting the distance between the nozzle of the laser cutting head and the surface of the machined workpiece by controlling a height adjusting shaft according to the distance signal. The invention further relates to a height adjusting method. The height adjusting shaft is controlled by a numerical control system, and the control right of the height adjusting shaft does not need to be switched, so that control right conflict is avoided; and operations including calibration, height follow-up and the like can be directly conducted on an operation interface of the numerical control system instead of being conducted in an electric cabinet, so that laser cutting quality and machining efficiency are improved.
Description
Technical field
The present invention relates to laser numerical control system field, be specifically related to height adjustment system and the height thereof of a kind of laser cutting head
Degree method of adjustment.
Background technology
In laser cutting machine tool control, due to the factors such as the fluctuating of workpiece and deformation, the focus of laser and surface of the work
Position can produce change and affect cutting effect, therefore to ensure good cutting effect then need to control nozzle and workpiece it
Between gap be a steady state value, traditional cutting head method for adjusting height is to be entered Z axis by an independent height arm control
Row controls, and other axles are controlled by motion control card or digital control system, or is provided Z axis control letter by independent height arm control
Number, digital control system go to perform.
Therefore, above-mentioned control mode can cause concordance poor.
How to solve the problem that the concordance of existing control mode is poor, be the problem of those skilled in the art's primary study
One of.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that a kind of laser cutting head
Height adjustment system, solve the problem that the concordance of existing control mode is poor.
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that a kind of laser cutting head
Method for adjusting height, solve the problem that the concordance of existing control mode is poor.
The technical solution adopted for the present invention to solve the technical problems is: provide the height adjustment system of a kind of laser cutting head
System, including the height adjustment axle being connected with laser cutting head, this height adjustment system also includes:
Sensor, the capacitance between nozzle and the processing surface of the work of this sensor detection laser cutting head；
Preamplifier, this preamplifier is connected with sensor and signal conditioner respectively, and this preamplifier is by electricity
Capacitance is converted into concussion frequency signal；
Signal conditioner, concussion frequency signal is processed by this signal conditioner, it is thus achieved that the nozzle of laser cutting head with
The distance signal of processing surface of the work；
Numerical control unit, this numerical control unit is connected with signal conditioner and height adjustment axle respectively, and it is according to distance signal also
The distance of nozzle with processing surface of the work by controlling height adjustment axial adjustment laser cutting head.
Wherein, preferred version is: this signal conditioner includes signal filtering Shaping Module and DSP signal processing module, should
Signal filtering Shaping Module is connected with preamplifier and DSP signal processing module respectively, this DSP signal processing module and numerical control
Unit connects；Concussion frequency signal is filtered by this signal filtering Shaping Module, shaping, frequency dividing, this DSP signal processing module
Concussion frequency signal after filtering, shaping, frequency dividing is carried out linearisation, it is thus achieved that the nozzle of laser cutting head and processing surface of the work
Distance signal.
Wherein, preferred version is: this signal filtering Shaping Module includes five rank bandwidth-limited circuits, the hysteresis being sequentially connected with
Comparator and frequency dividing circuit, this five rank bandwidth-limited circuit is connected with preamplifier, and this five rank bandwidth-limited circuit will concussion
Frequency signal carries out filtering higher hamonic wave and DC component, and little amplitude near sinusoidal signal is tentatively shaped to by this hysteresis loop comparator
Approximate square waves signal, this frequency dividing circuit reshaping also divides as square-wave signal.
Wherein, preferred version is: this DSP signal processing module storage has some fixed points, each fixed point all to include swashing
The nozzle of light cutting head and the distance value processing surface of the work, and the frequency values that each distance value is corresponding；This DSP signal processing
The frequency values of concussion frequency signal after filtering, shaping, frequency dividing is compared with the frequency values of each fixed point and divides by module
Section linearisation, it is thus achieved that the distance value corresponding to frequency values collected, and the distance signal comprising distance value is sent to numerical control
In unit.
Wherein, preferred version is: use digital bus communications mode between this signal conditioner and numerical control unit.
The technical solution adopted for the present invention to solve the technical problems is: provide the height adjustment side of a kind of laser cutting head
Method, including step:
According to applied environment, one preset height value is set；
The capacitance that the nozzle of detection laser cutting head is constituted with processing surface of the work, and capacitance is converted into concussion frequency
Rate signal, obtains the nozzle of laser cutting head and the distance on the surface of processing workpiece according to concussion frequency signal；
Preset height value and distance are compared, and according to preset height value dynamically adjust the nozzle of laser cutting head with
The distance of processing surface of the work.
Wherein, preferred version is, this method for adjusting height also includes demarcating steps:
Control laser cutting head to move towards processing surface of the work, and wait collision alarm；
Control laser cutting head after collision alarm being detected to move away from processing surface of the work, and wait that collision alarm disappears
Lose；
Controlling laser cutting head, some fixed points are set away from processing during surface of the work moves, record each mark
The nozzle of the laser cutting head of fixed point and the distance processing surface of the work.
Wherein, preferred version is, it is thus achieved that the nozzle of laser cutting head includes with the step of the distance on the surface of processing workpiece:
Concussion frequency signal is amplified, and filters higher hamonic wave and DC component, and by little amplitude near sinusoidal signal
Tentatively it is shaped to approximate square waves signal, and reshaping frequency dividing are square-wave signal；
Arranging some fixed points, each fixed point all includes the nozzle of laser cutting head and the distance of processing surface of the work
Value, and include the frequency values that each distance value is corresponding；
The frequency values of concussion frequency signal after filtering, shaping, frequency dividing is compared with the frequency values of each fixed point
And piece-wise linearization, it is thus achieved that the distance value corresponding to frequency values collected.
Wherein, preferred version is, the step arranging fixed point also includes:
Distance value according to each fixed point and frequency values, if calculating main section and the slope of each line segment.
Wherein, preferred version is, the step of piece-wise linearization includes:
Slope according to line segment and the endpoint value of line segment, by the frequency values of the concussion frequency signal after filtering, shaping, frequency dividing
Compare and piece-wise linearization, calculate the approximate distance value of described frequency values.
The beneficial effects of the present invention is, compared with prior art, the present invention is adjusted by the height of a kind of laser cutting head
Whole system and method for adjusting height thereof, height adjustment axle is by digital control system control, it is not necessary to transition altitude adjusts the control of axle,
Avoid control conflict, can directly carry out operations such as demarcating, the most servo-actuated at the operation interface of digital control system, it is not necessary in electricity cabinet
Operate, it is further provided excellent Altitude control performance, improve quality and the working (machining) efficiency of cut；Its structure letter
List, easy-to-connect, easy to use, producing, use, maintenance process reduces cost and labour force；Meanwhile, calibration process realizes
Automatization, it is to avoid the troublesome operation of manual demarcation, and use digital bus communications method with numerical control unit, it is to avoid analog quantity
Interference.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structured flowchart of height adjustment system of the present invention；
Fig. 2 is the structured flowchart of signal conditioner of the present invention；
Fig. 3 is the structured flowchart of signal filtering Shaping Module of the present invention；
Fig. 4 is the flow chart of method for adjusting height of the present invention；
Fig. 5 is the flow chart of scaling method of the present invention；
Fig. 6 is that the present invention obtains the nozzle of laser cutting head and the flow chart of the distance on the surface of processing workpiece；
Fig. 7 is the further flow chart of Fig. 6.
Detailed description of the invention
In conjunction with accompanying drawing, presently preferred embodiments of the present invention is elaborated.
As it is shown in figure 1, the present invention provides the preferred embodiment of a kind of height adjustment system.
A kind of height adjustment system of laser cutting head 30, including the height adjustment axle 20 being connected with laser cutting head 30,
This height adjustment system also includes sensor 11, preamplifier 12, signal conditioner 13 and numerical control unit 14, this sensor
11, preamplifier 12, signal conditioner 13 and numerical control unit 14 are sequentially connected with, and this numerical control unit 14 is with height adjustment axle 20 even
Connect, be described in detail below:
This sensor 11 detects the capacitance between the nozzle of laser cutting head 30 and processing surface of the work；This preposition amplification
Device 12 is connected with sensor 11 and signal conditioner 13 respectively, and capacitance is converted into concussion frequency letter by this preamplifier 12
Number；Concussion frequency signal is processed by this signal conditioner 13, it is thus achieved that the nozzle of laser cutting head 30 and processing surface of the work
Distance signal；This numerical control unit 14 is connected with signal conditioner 13 and height adjustment axle 20 respectively, and it is according to distance signal also
The nozzle of laser cutting head 30 and the distance of processing surface of the work is adjusted by controlling height adjustment axle 20.
Wherein, numerical control unit 14 receives signal conditioner 13 and sends the distance signal (altitude signal) of coming, by itself and use
The height value that family sets compares, and carries out the movement of closed loop control height adjustment axle 20 so that it is be maintained at what user set
Complete the servo antrol of laser cutting head 30 in the range of height value, according to the demand of reality application, can adjust in host computer
Whole parameter so that it is response speed adapts to concrete application and reaches optimized control effect.
In invention, adjust laser cutting head 30 nozzle and processing surface of the work between gap use " distance " this
Vocabulary, it is consistent with the meaning expressed by " high " in the present invention, simply facilitates the understanding of the present invention, is all to express laser to cut
Cut the clearance distance between the nozzle of 30 and processing surface of the work；Due to laser cutting head 30 with processing workpiece away from close
Direction not necessarily in the vertical direction, if being horizontally away from, close, the vocabulary of " highly " class mentioned in the present invention is all to express
Clearance distance between nozzle and the processing surface of the work of laser cutting head 30.The whole embodiment of the present invention preferably employs laser and cuts
Cut 30 with processing workpiece away from being vertical direction near direction.
In the present embodiment, the Main Function of sensor 11 is between the nozzle of laser cutting head 30 and processing surface of the work
Gap response for changing, nozzle is as sensor 11 one of them pole plate of electric capacity, and processing surface of the work is as sensor 11
Another pole plate of electric capacity, when cutting head moves at vertical direction, the distance between nozzle and measured object also changes, root
According to capacitance equationWherein s is area, εrFor dielectric constant, δ is the gap of nozzle and workpiece, the sensor that both are constituted
The capacitance of 11 electric capacity changes the most therewith.
Meanwhile, the Main Function of preamplifier 12 is that the change of the gap to sensor 11 carries out C-F conversion, i.e. electric capacity-
Frequency transformation, uses FM circuit, and BNC coaxial cable provides 15V voltage to FM circuit, produces the high frequency that frequency is MHZ level
Oscillator signal, along with the gap between nozzle and workpiece changes, the concussion frequency signal of generation is as well as change, through amplifying
After be added to the inner core of BNC coaxial cable, the inner core of coaxial cable is the exchange that the DC voltage of 15V is superimposed with the hundreds of mV of amplitude
Voltage, and be transferred in signal conditioner 13.
In the present embodiment, digital bus communications mode is used between this signal conditioner 13 and numerical control unit 14.
Owing to DA conversion and AD conversion the two link cause the decline of precision and interference to increase, the present embodiment uses bus
Mode and numerical control unit 14 connecting communication, eliminate DA conversion and AD conversion link, it is to avoid under the interference of analog quantity and precision
Fall.
As shown in Figures 2 and 3, the present invention provides the preferred embodiment of a kind of signal conditioner.
This signal conditioner 13 includes signal filtering Shaping Module 131 and DSP signal processing module 132, this signal filtering
Shaping Module 131 is connected with preamplifier 12 and DSP signal processing module 132 respectively, this DSP signal processing module 132 with
Numerical control unit 14 connects；Concussion frequency signal is filtered by this signal filtering Shaping Module 131, shaping, frequency dividing, this DSP believe
Concussion frequency signal after filtering, shaping, frequency dividing is carried out linearisation by number processing module 132, it is thus achieved that the spray of laser cutting head 30
Mouth and the distance signal processing surface of the work.
Wherein, Digital Signal Processing abbreviation DSP, DSP signal processing module 132 preferably one is particularly suitable for counting
The microprocessor of word signal processing computing, it is mainly applied is to realize various digital signal processing algorithm real-time.
Wherein, signal conditioner 13 is preferably DSP signal processing chip, it is also possible to for ARM chip.
Five rank bandwidth-limited circuits 1311 that in the present embodiment, this signal filtering Shaping Module 131 includes being sequentially connected with,
Hysteresis loop comparator 1312 and frequency dividing circuit 1313, this five rank bandwidth-limited circuit 1311 is connected with preamplifier 12, these five rank
Concussion frequency signal is carried out filtering higher hamonic wave and DC component by bandwidth-limited circuit 1311, and this hysteresis loop comparator 1312 is by little
Amplitude near sinusoidal signal is tentatively shaped to approximate square waves signal, and this frequency dividing circuit 1313 reshaping also divides as square-wave signal.
Specifically, the Main Function of signal conditioner 13 is that the signal transmitting preamplifier 12 is by the logical filter of five rank bands
Wave circuit 1311 carries out filtering higher hamonic wave and DC component, and through hysteresis loop comparator 1312 by small magnitude near sinusoidal signal
Tentatively it is shaped to the approximate square waves signal of amplitude 5V, then the square wave letter being amplitude 5V through frequency dividing circuit 1313 shaping frequency dividing
Number, then 5V signal is transformed to by electrical level transferring chip the 3.3V square wave letter mated with DSP signal processing chip pin level
Number, it is then sent through in DSP signal processing module 132.Wherein, frequency dividing circuit 1313 is preferably integrated frequency dividing chip.
Meanwhile, concussion frequency signal is carried out multi-period Synchronous frequency discrimination method capture, gathers the frequency of preamplifier 12
Signal, is preferably and is filtered 32 frequency values collected, and wherein removes, bigger 8 values and less 8 values to 16
Individual intermediate value is averaged value filtering.
In the present embodiment, the storage of this DSP signal processing module 132 has some fixed points, each fixed point all to include swashing
The nozzle of light cutting head 30 and the distance value processing surface of the work, and the frequency values that each distance value is corresponding；At this DSP signal
The frequency values of concussion frequency signal after filtering, shaping, frequency dividing is compared by reason module 132 with the frequency values of each fixed point
And piece-wise linearization, it is thus achieved that the distance value corresponding to frequency values collected, and the distance signal comprising distance value is sent to
In numerical control unit 14.
Further, DSP signal processing module 132 filtered frequency values is compared with the value having demarcated record into
Row piece-wise linearization, the method using multiple line segment curve of approximation, calibrating procedure records the frequency values of each fixed point, root
Calculate the slope of each line segment according to the height value of each point and the frequency values of this point, DSP signal processing module 132 is according to current
Frequency values judges to belong to which line segment, can calculate current approximation according to the endpoint value of the slope calculated and line segment high
Angle value, then sends the value after linearisation after first-order lag filters again.
As shown in Figure 4, Figure 5, Figure 6 and Figure 7, the present invention provides the preferred embodiment of a kind of method for adjusting height.
A kind of method for adjusting height of laser cutting head, including step:
S21, a preset height value is set according to applied environment；
The capacitance that S22, the nozzle of detection laser cutting head are constituted with processing surface of the work, and capacitance is converted into shake
Swing frequency signal, obtain the nozzle of laser cutting head and the distance on the surface of processing workpiece according to concussion frequency signal；
S23, preset height value and distance are compared, and dynamically adjust the spray of laser cutting head according to preset height value
Mouth and the distance processing surface of the work.
Specifically, numerical control unit arranges a preset height value by operation interface and according to applied environment, and sensor detects
The capacitance that the nozzle of laser cutting head is constituted with processing surface of the work, and capacitance is converted into concussion frequency by preamplifier
Signal, signal conditioner obtains the nozzle of laser cutting head and the distance on the surface of processing workpiece, number according to concussion frequency signal
Preset height value and distance are compared by control unit, and according to preset height value by controlling height adjustment axle, dynamically adjust
The nozzle of laser cutting head and the distance processing surface of the work.
Numerical control unit receives signal conditioner and sends the distance signal (altitude signal) of coming, the height it set with user
Angle value compares, and carries out the movement of closed loop control height adjustment axle so that it is be maintained at the scope of the height value that user sets
Inside complete the servo antrol of laser cutting head, according to the demand of reality application, parameter can be adjusted in host computer so that it is response
Velocity adaptive is specifically applied and is reached optimized control effect.
In the present embodiment, it is provided that the preferred version of the scaling method of a kind of laser cutting head.
A kind of scaling method of laser cutting head, including step:
S11, control laser cutting head move towards processing surface of the work, and wait collision alarm；
S12, collision alarm detected after control laser cutting head and move away from processing surface of the work, and wait collision alarm
Disappear；
S13, arranging some fixed points during laser cutting head moves away from processing surface of the work controlling, record is every
The nozzle of the laser cutting head of one fixed point and the distance processing surface of the work.
Specifically, first numerical control unit control height adjustment axle slowly moves down wait collision alarm, touches when receiving
Slowly moving up wait collision alarm after hitting signal to disappear, 16 points the most according to a preconcerted arrangement, numerical control unit is by height adjustment
Axle often moves at a point, i.e. sends to signal conditioner and demarcates request signal, and signal conditioner have recorded the numerical value of this point
After (nozzle of laser cutting head and the distance value processing surface of the work), send to numerical control unit and demarcate confirmation signal, numerical control list
It is mobile that unit i.e. controls height adjustment axially next point, and after end to be calibrated, the data demarcated are verified by signal conditioner.
Further, if calibration process occurring, accidental interruption or other factors cause data exception, then signal condition
Device sends calibration result rub-out signal to numerical control unit.
In the present embodiment, the control signal between signal conditioner and numerical control unit includes collision alarm, disconnection signal, mark
Determine request signal, demarcate confirmation signal, calibration result signal.Wherein, the signal conditioner meeting when nozzle touches surface of the work
Collision alarm is sent to numerical control unit；When radio-frequency cable is not connected with or damages, signal conditioner can send broken string to numerical control unit
Signal；Demarcating request signal is the signal that numerical control unit is demarcated to the request that signal conditioner sends；Demarcating confirmation signal is letter
The signal that number conditioner sends to numerical control unit after have recorded a point；Calibration result signal be demarcation is terminated after carry out data
Verification, causes this signal of error in data to send if calibration process goes wrong.
In an embodiment, it is thus achieved that the nozzle of laser cutting head includes with the step of the distance on the surface of processing workpiece:
S221, general's concussion frequency signal amplify, and filter higher hamonic wave and DC component, and by little amplitude near sinusoidal
Signal is tentatively shaped to approximate square waves signal, and reshaping frequency dividing are square-wave signal；
S222, arranging some fixed points, each fixed point all includes nozzle and the processing surface of the work of laser cutting head
Distance value, and include the frequency values that each distance value is corresponding；
S224, the frequency values of the concussion frequency values of frequency signal after filtering, shaping, frequency dividing and each fixed point is carried out
Comparison and piece-wise linearization, it is thus achieved that the distance value corresponding to frequency values collected.
Specifically, concussion frequency signal is amplified by preamplifier, and five rank bandwidth-limited circuits carry out filtering higher hamonic wave
And DC component, and little amplitude near sinusoidal signal is tentatively shaped to approximate square waves signal by hysteresis loop comparator, and frequency dividing electricity
Road reshaping also divides as square-wave signal；Numerical control unit arranges some fixed points, and each fixed point all includes laser cutting head
Nozzle and the distance value processing surface of the work, and include the frequency values that each distance value is corresponding；DSP signal processing module will filter
The frequency values of concussion frequency signal after ripple, shaping, frequency dividing compares and piece-wise linearization with the frequency values of each fixed point,
Obtain the distance value corresponding to frequency values collected.
Or, present invention additionally comprises other algorithms, for obtaining current distance value by concussion frequency signal.
In an embodiment, the step arranging fixed point also includes:
S223, according to the distance value of each fixed point and frequency values, if calculating main section and the slope of each line segment.
Specifically, numerical control unit is according to the distance value of each fixed point and frequency values, if calculating main section and each line
The slope of section.
In an embodiment, the step of piece-wise linearization includes:
S224 ', endpoint value according to the slope of line segment with line segment, by the frequency signal that shakes after filtering, shaping, frequency dividing
Frequency values compares and piece-wise linearization, calculates the approximate distance value of described frequency values.
Specifically, the signal conditioner slope according to line segment and the endpoint value of line segment, by the shake after filtering, shaping, frequency dividing
The frequency values swinging frequency signal compares and piece-wise linearization, calculates the approximate distance value of described frequency values.
As described above, only preferred embodiment, it is not intended to limit the scope of the present invention, Fan Yibenfa
The equivalence that bright claim is made changes or modifies, and is all the present invention and is contained.
Claims (10)
1. a height adjustment system for laser cutting head, including the height adjustment axle being connected with laser cutting head, its feature exists
In, this height adjustment system also includes:
Sensor, the capacitance between nozzle and the processing surface of the work of this sensor detection laser cutting head；
Preamplifier, this preamplifier is connected with sensor and signal conditioner respectively, and this preamplifier is by capacitance
It is converted into concussion frequency signal；
Signal conditioner, concussion frequency signal is processed by this signal conditioner, it is thus achieved that the nozzle of laser cutting head and processing
The distance signal of surface of the work；
Numerical control unit, this numerical control unit is connected with signal conditioner and height adjustment axle respectively, and it is according to distance signal and passes through
Control the nozzle of height adjustment axial adjustment laser cutting head and the distance of processing surface of the work.
Height adjustment system the most according to claim 1, it is characterised in that: this signal conditioner includes signal filtering shaping
Module and DSP signal processing module, this signal filtering Shaping Module connects with preamplifier and DSP signal processing module respectively
Connecing, this DSP signal processing module is connected with numerical control unit；Concussion frequency signal is filtered by this signal filtering Shaping Module,
Shaping, frequency dividing, the concussion frequency signal after filtering, shaping, frequency dividing is carried out signal processing by this DSP signal processing module, it is thus achieved that
The nozzle of laser cutting head and the distance signal processing surface of the work.
Height adjustment system the most according to claim 2, it is characterised in that: this signal filtering Shaping Module includes connecting successively
Five rank bandwidth-limited circuits, hysteresis loop comparator and the frequency dividing circuit connect, this five rank bandwidth-limited circuit is connected with preamplifier,
Concussion frequency signal is carried out filtering higher hamonic wave and DC component by this five rank bandwidth-limited circuit, and this hysteresis loop comparator shakes little
Width near sinusoidal signal is tentatively shaped to approximate square waves signal, and this frequency dividing circuit reshaping also divides as square-wave signal.
Height adjustment system the most according to claim 2, it is characterised in that: this DSP signal processing module storage has some
Fixed point, each fixed point all includes the nozzle of laser cutting head and the distance value of processing surface of the work, and each distance value
Corresponding frequency values；This DSP signal processing module by after filtering, shaping, frequency dividing concussion frequency signal frequency values with each
The frequency values of fixed point compares and piece-wise linearization, it is thus achieved that the distance value corresponding to frequency values collected, and will comprise
The distance signal of distance value is sent in numerical control unit.
5. according to the arbitrary described height adjustment system of Claims 1-4, it is characterised in that: this signal conditioner and numerical control list
Digital bus communications mode is used between unit.
6. the method for adjusting height of a laser cutting head, it is characterised in that include step:
According to applied environment, one preset height value is set；
The capacitance that the nozzle of detection laser cutting head is constituted with processing surface of the work, and capacitance is converted into concussion frequency letter
Number, the nozzle of laser cutting head and the distance on the surface of processing workpiece is obtained according to concussion frequency signal；
Preset height value and distance are compared, and dynamically adjusts nozzle and the processing of laser cutting head according to preset height value
The distance of surface of the work.
Method for adjusting height the most according to claim 6, it is characterised in that this method for adjusting height also includes demarcating step
Rapid:
Control laser cutting head to move towards processing surface of the work, and wait collision alarm；
Control laser cutting head after collision alarm being detected to move away from processing surface of the work, and wait that collision alarm disappears；
Controlling laser cutting head, some fixed points are set away from processing during surface of the work moves, record each fixed point
Laser cutting head nozzle with processing surface of the work distance.
Method for adjusting height the most according to claim 7, it is characterised in that obtain nozzle and the processing work of laser cutting head
The step of the distance on the surface of part includes:
Concussion frequency signal is amplified, and filters higher hamonic wave and DC component, and by preliminary for little amplitude near sinusoidal signal
It is shaped to approximate square waves signal, and reshaping frequency dividing are square-wave signal；
Arranging some fixed points, each fixed point all includes the nozzle of laser cutting head and the distance value of processing surface of the work, with
And include the frequency values that each distance value is corresponding；
The frequency values of concussion frequency signal after filtering, shaping, frequency dividing is compared with the frequency values of each fixed point and divides
Section linearisation, it is thus achieved that the distance value corresponding to frequency values collected.
Method for adjusting height the most according to claim 8, it is characterised in that the step arranging fixed point also includes:
Distance value according to each fixed point and frequency values, if calculating main section and the slope of each line segment.
Method for adjusting height the most according to claim 9, it is characterised in that the step of piece-wise linearization includes:
Slope according to line segment and the endpoint value of line segment, carried out the frequency values of the concussion frequency signal after filtering, shaping, frequency dividing
Comparison and piece-wise linearization, calculate the approximate distance value of described frequency values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915090.6A CN106312306B (en) | 2016-10-20 | 2016-10-20 | A kind of height adjustment system and its method for adjusting height of laser cutting head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915090.6A CN106312306B (en) | 2016-10-20 | 2016-10-20 | A kind of height adjustment system and its method for adjusting height of laser cutting head |
Publications (2)
| Publication Number | Publication Date |
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| CN106312306A true CN106312306A (en) | 2017-01-11 |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735940A (en) * | 2017-02-24 | 2017-05-31 | 广东正业科技股份有限公司 | Laser cutting machine |
| CN107088704A (en) * | 2017-05-05 | 2017-08-25 | 佛山市宏石激光技术有限公司 | The laser cutting method and device of a kind of rectangle pipe material |
| CN107953030A (en) * | 2017-12-26 | 2018-04-24 | 武汉力博物探有限公司 | A kind of processing method and system of laser cutting head process component |
| CN108115304A (en) * | 2017-12-30 | 2018-06-05 | 安徽泉盛化工有限公司 | A kind of Intelligentized regulating and controlling method of welding process |
| CN109164760A (en) * | 2018-10-22 | 2019-01-08 | 大族激光科技产业集团股份有限公司 | A kind of height-regulating method and device with dual modes of operation |
| CN109590619A (en) * | 2018-12-06 | 2019-04-09 | 大族激光科技产业集团股份有限公司 | A kind of cutting head height control method and laser cutting machine |
| CN111421254A (en) * | 2020-03-20 | 2020-07-17 | 大族激光科技产业集团股份有限公司 | Follow-up height-adjusting sensor structure and measurement and control system |
| CN111442704A (en) * | 2020-03-27 | 2020-07-24 | 惠州市迈测科技有限公司 | Carrier displacement reading device |
| CN111774722A (en) * | 2020-06-30 | 2020-10-16 | 大族激光科技产业集团股份有限公司 | Intelligent control method based on decay of feedback signal of capacitive sensor of laser system |
| CN112496565A (en) * | 2020-11-17 | 2021-03-16 | 上海维宏智能技术有限公司 | Device for realizing signal processing of servo system of laser cutting head |
| CN112577407A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for correcting parameter drift of capacitive sensor |
| CN112577403A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for evaluating capacitor calibration effect |
| CN112743242A (en) * | 2021-01-21 | 2021-05-04 | 固高科技(深圳)有限公司 | High-precision control method and device of height adjuster and height adjuster control equipment |
| CN113977332A (en) * | 2021-12-02 | 2022-01-28 | 上海维宏智能技术有限公司 | Method, device, processor and storage medium for realizing obstacle detection and active obstacle avoidance control based on capacitive sensor |
| CN114406510A (en) * | 2022-02-25 | 2022-04-29 | 深圳软动智能控制有限公司 | Laser head focusing control device and system |
| CN114543648A (en) * | 2022-04-11 | 2022-05-27 | 深圳软动智能控制有限公司 | Metal cutting height sensor |
| CN114535844A (en) * | 2022-03-31 | 2022-05-27 | 华工法利莱切焊系统工程有限公司 | System and method for monitoring working distance of laser cutting head |
| CN114578753A (en) * | 2022-01-20 | 2022-06-03 | 西门子（中国）有限公司 | Workpiece processing control method and device, computer equipment and computer readable medium |
| CN114625070A (en) * | 2022-02-22 | 2022-06-14 | 大族激光科技产业集团股份有限公司 | Laser processing control method, device and readable storage medium |
| CN115971691A (en) * | 2023-03-21 | 2023-04-18 | 济南森峰激光科技股份有限公司 | Capacitive distance measurement system and method for laser cutting |
| CN117102701A (en) * | 2023-10-24 | 2023-11-24 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735940A (en) * | 2017-02-24 | 2017-05-31 | 广东正业科技股份有限公司 | Laser cutting machine |
| CN107088704A (en) * | 2017-05-05 | 2017-08-25 | 佛山市宏石激光技术有限公司 | The laser cutting method and device of a kind of rectangle pipe material |
| CN107953030A (en) * | 2017-12-26 | 2018-04-24 | 武汉力博物探有限公司 | A kind of processing method and system of laser cutting head process component |
| CN108115304A (en) * | 2017-12-30 | 2018-06-05 | 安徽泉盛化工有限公司 | A kind of Intelligentized regulating and controlling method of welding process |
| CN109164760A (en) * | 2018-10-22 | 2019-01-08 | 大族激光科技产业集团股份有限公司 | A kind of height-regulating method and device with dual modes of operation |
| CN109164760B (en) * | 2018-10-22 | 2020-07-14 | 大族激光科技产业集团股份有限公司 | Height adjusting method and device with dual working modes |
| CN109590619A (en) * | 2018-12-06 | 2019-04-09 | 大族激光科技产业集团股份有限公司 | A kind of cutting head height control method and laser cutting machine |
| CN109590619B (en) * | 2018-12-06 | 2021-08-03 | 大族激光科技产业集团股份有限公司 | Cutting head height control method and laser cutting machine |
| CN112577403A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for evaluating capacitor calibration effect |
| CN112577407A (en) * | 2019-09-27 | 2021-03-30 | 大族激光科技产业集团股份有限公司 | Method and system for correcting parameter drift of capacitive sensor |
| CN111421254A (en) * | 2020-03-20 | 2020-07-17 | 大族激光科技产业集团股份有限公司 | Follow-up height-adjusting sensor structure and measurement and control system |
| CN111442704A (en) * | 2020-03-27 | 2020-07-24 | 惠州市迈测科技有限公司 | Carrier displacement reading device |
| CN111774722A (en) * | 2020-06-30 | 2020-10-16 | 大族激光科技产业集团股份有限公司 | Intelligent control method based on decay of feedback signal of capacitive sensor of laser system |
| CN112496565B (en) * | 2020-11-17 | 2023-03-03 | 上海维宏智能技术有限公司 | Device for realizing signal processing of servo system of laser cutting head |
| CN112496565A (en) * | 2020-11-17 | 2021-03-16 | 上海维宏智能技术有限公司 | Device for realizing signal processing of servo system of laser cutting head |
| CN112743242A (en) * | 2021-01-21 | 2021-05-04 | 固高科技(深圳)有限公司 | High-precision control method and device of height adjuster and height adjuster control equipment |
| CN113977332A (en) * | 2021-12-02 | 2022-01-28 | 上海维宏智能技术有限公司 | Method, device, processor and storage medium for realizing obstacle detection and active obstacle avoidance control based on capacitive sensor |
| CN114578753A (en) * | 2022-01-20 | 2022-06-03 | 西门子（中国）有限公司 | Workpiece processing control method and device, computer equipment and computer readable medium |
| CN114625070A (en) * | 2022-02-22 | 2022-06-14 | 大族激光科技产业集团股份有限公司 | Laser processing control method, device and readable storage medium |
| CN114406510A (en) * | 2022-02-25 | 2022-04-29 | 深圳软动智能控制有限公司 | Laser head focusing control device and system |
| CN114535844A (en) * | 2022-03-31 | 2022-05-27 | 华工法利莱切焊系统工程有限公司 | System and method for monitoring working distance of laser cutting head |
| CN114535844B (en) * | 2022-03-31 | 2024-03-19 | 华工法利莱切焊系统工程有限公司 | Laser cutting head working distance monitoring system and method |
| CN114543648A (en) * | 2022-04-11 | 2022-05-27 | 深圳软动智能控制有限公司 | Metal cutting height sensor |
| CN115971691A (en) * | 2023-03-21 | 2023-04-18 | 济南森峰激光科技股份有限公司 | Capacitive distance measurement system and method for laser cutting |
| CN117102701A (en) * | 2023-10-24 | 2023-11-24 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
| CN117102701B (en) * | 2023-10-24 | 2024-03-26 | 上海方菱计算机软件有限公司 | Compensation control method and device for groove cutting height, electronic equipment and storage medium |
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Address after: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee after: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Patentee after: Shenzhen Han's photon laser technology Co.,Ltd. Patentee after: SHENZHEN HAN'S SMART CONTROL TECHNOLOGY Co.,Ltd. Address before: 518000 No. 9988 Shennan Road, Nanshan District, Shenzhen, Guangdong Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. Patentee before: HAN'S PA AUTOMATION TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN HAN'S SMART CONTROL TECHNOLOGY Co.,Ltd. |