CN101574757A - Control system of ultrasonic welding machine - Google Patents
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- CN101574757A CN101574757A CN 200910098289 CN200910098289A CN101574757A CN 101574757 A CN101574757 A CN 101574757A CN 200910098289 CN200910098289 CN 200910098289 CN 200910098289 A CN200910098289 A CN 200910098289A CN 101574757 A CN101574757 A CN 101574757A
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- 238000003466 welding Methods 0.000 title claims abstract description 45
- 238000012545 processing Methods 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000306 recurrent effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of welding and relates to a control system of an ultrasonic welding machine. The control system solves the problems of poor working stability, low efficiency, low working quality and the like of the existing ultrasonic welding machine. The control system of the ultrasonic welding machine comprises an inverter, an ultrasonic transducer and a central processing unit; the inverter is respectively connected with the central processing unit and the ultrasonic transducer; a frequency tracking control system is connected between the inverter and the ultrasonic transducer; a sensor which is used for detecting a frequency signal and arranged at a tool head is connected between the ultrasonic transducer and the central processing unit; the inverter inputs voltage and current signal parameters to the central processing unit, and the sensor inputs the frequency signal parameters at the tool head to the central processing unit, the processing is carried out, and the controlled quantity is calculated; and a pulse generator which is used for generating a frequency pulse signal according to the controlled quantity is further connected between the inverter and the central processing unit. The control system of the ultrasonic welding machine has the advantages of simple structure, good stability, high working efficiency and quality and the like.
Description
Technical field
The invention belongs to welding technology field, relate to the control system of a kind of welder, particularly a kind of ultrasonic welding machine.
Background technology
Ultrasonic power provides the supersonic frequency ac signal to ultrasonic transducer, and it realizes that circuit claims ultrasonic drive circuit again.In 20th century, in the time of along with the fast development of electronic technology, the used power device of ultrasonic wave inverter has experienced electron tube, and IGCT, transistor and IGBT be totally 4 stages.Used novel circuit topological structure and novel power device in recent years in circuit design, the reliability of ultrasonic power, workload-adaptability, consistency of product are further enhanced, and efficient also improves greatly simultaneously, and the volume of product also reduces at any time.
Traditional ultrasonoscope is that to adopt oscillator to produce hyperacoustic, and to adopt electron tube be power device.Its shortcoming be bulky, heavy, thermal losses is big, reactive power is big.The eighties in 20th century, change ambipolar high power transistor, switch operating frequency 20kHz commonly used into.Adopted insulated gate bipolar power transistor (IGBT) afterwards again, operating voltage and operating current quota (being the single tube capacity) have increased significantly.To the nineties in 20th century, owing to the technological progress of power field effect pipe MOSFET is widely adopted, the switch operating frequency reaches 100kHz.Over past ten years, ultrasonic power adopts HF switch AC power technology, and inner integrated various chips or large scale integrated circuit are realized the dynamic control to bandwidth frequency, and its development trend must be a high efficiency, and as power supply, efficient is one of important indicator.The efficient height, the heating loss is little, and heat radiation is just accomplished the vibration of large power supersonic and high power easily easily.
In the supersonic welding termination process, because the variation of various factors such as the temperature of weld load and vibrational system, rigidity, bonding area, processing wearing and tearing, make system frequency drift about, if frequency generator is not followed variation, certainly will cause the imbalance of whole system, this just requires supersonic generator to have the automatic frequency tracking function.Traditional ultrasonic welding machine adopts vacuum tube oscillator to produce high-frequency signal, directly produces power ultrasonic after power amplification, thereby is difficult to realize can not adapt to the variation of weld load by frequency-tracking.For rapidity and the accuracy that realizes frequency-tracking better, people have carried out various explorations on its mode.Common ultrasonic bonding supply frequency automatic following control system has following control mode.
1, the self-oscillation mode of electricity feedback.Because it is simple and easy, use quite extensive, representational method is to adopt differential variable bridge circuit that PZT (piezoelectric transducer) electricity arm is compensated, make electrical feedback signal depend on robotic arm, reach frequency from motion tracking, simultaneously circuit can improve and satisfy self-oscillatory phase condition, is built into 1 self-oscillation loop, self-oscillation frequency accidental tool resonance point is changed synchronously, realize from motion tracking.
2, phase-locked VCO mode.Phase-locked this frequency tracking method of VCO mode is the phase difference signal of taking out voltage and current, and with its control signal as excited vibration system resonance frequency change, and a phase control system of realizing.
3, electric current dynamical feedback mode.Be under the situation of 1 two-port network with the ultrasonic transducer equivalence, the relation of output amplitude and size of current when deriving resonance, the transducer current virtual value is regulated reverse frequency as feedback quantity, realize ultrasonic system resonance control box amplitude constant output control.
In fact, all there is its weak point in above-mentioned various control methods.Such as, for the self-oscillation mode, if PZT (piezoelectric transducer) has multiple mode of resonance, then this method is just unreliable; The phase-lock mode automatic frequency tracking then will drive loop increase transducing reactor compensating element; And for dynamical feedback frequency-tracking mode, the direction that frequency is adjusted also is difficult to hold, and is difficult to realize automation control.In addition, in various frequency-tracking modes, feedback signal is all from ultrasonic transducer or oscillation control signal, ignored the influence of luffing bar and the first-class ultrasonic device of instrument to resonance, do not detect actual frequency output situation (can obviously change output frequency add load usually after), be called " high-power ultrasonics metal welding meet sb. at the airport self-adapting signal source " for CN201147869Y as Chinese patent Granted publication number at the tool heads place.According to above analysis, the embodiment of high-power ultrasonics welding processing control at present is all undesirable, all has defective.
Summary of the invention
The objective of the invention is at the existing the problems referred to above of existing technology, and a kind of Self Adaptive Control dicyclo feedback controling mode of realizing automatic frequency tracking in the process of welding is provided, thereby the power output that realizes welding is constant and adjustable, efficient is high, harmonic pollution is little, the control system of stable and reliable working performance, ultrasonic welding machine that the adaptive load ability is strong.
Purpose of the present invention can realize by following technical proposal: a kind of control system of ultrasonic welding machine, comprise inverter, ultrasonic transducer and central processing unit, described inverter is connected with ultrasonic transducer with central processing unit respectively, it is characterized in that, be connected with the frequency-tracking control system of feeding back real-time control when being used for resonance between described inverter and the ultrasonic transducer, be connected with the sensor that is used to detect frequency signal that is installed in tool heads between described ultrasonic transducer and the central processing unit, above-mentioned inverter is with voltage, current signal parameter and sensor all are input to the frequency signal parameter at tool heads place and handle the back in the central processing unit and calculate controlled quentity controlled variable, also are connected with the impulse generator that is used for producing according to controlled quentity controlled variable the frequency pulse signal between inverter and central processing unit.
The control system of this ultrasonic welding machine has creatively realized the dicyclo control mode, wherein by the frequency-tracking control system is set between ultrasonic transducer and inverter, ultrasonic transducer can send by the frequency-tracking control system and feed back signal to inverter, making has a frequency-tracking closed-loop control feedback loop between the two, forms resonance and reaches real-time control.Another ring is made up of inverter, transducer, sensor, central processing unit and impulse generator, and detect frequency signal and feed back on the central processing unit by the sensor on the tool heads, export and the work of driving inverter by the impulse generator of central processing unit control oscillation frequency signal again, to obtain desirable frequency curve of output.This central processing unit has used the MCU microcontroller in addition, modern technologies such as DDS Direct Digital Frequency Synthesizers, when three-phase alternating current input after rectifier filter alternating current is become behind the alternating current that direct current becomes direct current by inverter welding usefulness again and is input in the central processing unit, wherein central processing unit is to voltage, electric current, the transducer amplitude, all multi-parameters such as voltage signal phase difference are carried out on-line measurement, identification, onlinely utilize recurrent least square method to carry out parameter to know and to debate, revise the control parameter simultaneously, adopt minimum variance control law or POLE PLACEMENT USING control law, and pass through Adaptable System, go out controlled quentity controlled variable and according to the rules program changes systematic parameter according to detected each calculation of parameter, controlled frequency with the DDS outputting standard comes regulating frequency, and the frequency that makes impulse generator is the resonant frequency of tracking system well.
In the control system of above-mentioned ultrasonic welding machine, also be connected with step-up transformer between described inverter and the ultrasonic transducer.The big voltage of using when becoming welding after by step-up transformer alternating voltage being amplified here.
Be connected with step-up transformer between inverter of this ultrasonic welding machine and the ultrasonic transducer, step-up transformer will amplify the alternating voltage that comes out from inverter, uses in the time of offering the ultrasonic welding machine welding better.
In the control system of above-mentioned ultrasonic welding machine, also be connected with detecting amplifier between described inverter and the central processing unit, step-up transformer all with after detecting amplifier is connected is input in the central processing unit with inverter.Here detecting amplifier mainly is to be used for voltage, current signal detected amplifying the back and being input in the central processing unit, makes things convenient for central processing unit to handle calculating.
Step-up transformer of this ultrasonic welding machine and inverter are input in central processing unit after amplifying electric current, voltage signal through detecting amplifier again, central processing unit is more convenient when analyzing and processing is calculated these signals like this, simultaneously also can improve accuracy in computation, make the impulse generator output of central processing unit control oscillation frequency signal and drive inverter and export more suitably frequency, make that ultrasonic welding machine is stable more, efficient at work, high-quality.
In the control system of above-mentioned ultrasonic welding machine, also be connected with wave filter between described sensor and the central processing unit.Here wave filter mainly carries out filtering to the detected frequency signal of the sensor at tool heads place.
This ultrasonic welding machine is connected with wave filter between sensor and central processing unit, the clutter that contains ectocine tool heads output frequency in the detected frequency signal of sensor, by wave filter these clutters are got rid of, the frequency signal that arrives central processing unit like this can reflect the actual output frequency of tool heads self more realistically.
In the control system of above-mentioned ultrasonic welding machine, the input end of described inverter is connected with rectifier filter.Here rectifier filter mainly is that the voltage and current signal of importing is carried out rectifying and wave-filtering.
This ultrasonic welding machine provides this ultrasonic bonding mechanomotive force with extraneous AC power, the alternating current that often is being mingled with a variety of frequencies in the extraneous AC power, by rectifier filter AC rectification is become direct current, the alternating current that direct current is become single-frequency by inverter uses for ultrasonic welding machine so that stable power to be provided again, improves the quality and the stability of ultrasonic welding machine work greatly.
In the control system of above-mentioned ultrasonic welding machine, also be connected with drive circuit between described impulse generator and the inverter.Here can drive inverter work by drive circuit.
Inverter is by drive circuit driving work in this ultrasonic welding machine.
Compared with prior art, this ultrasonic welding machine the control system advantage be to adopt the dicyclo control mode, replace simulation control with the Digital Control mode, realized dynamic control to bandwidth frequency, can eliminate the shortcoming that conventional simulation adjusters such as temperature drift are difficult to overcome, helping parameter tuning and variable element regulates, be convenient to change by program software, adjust the control scheme easily and realize multiple Novel Control, can reduce simultaneously number, the simplification hardware configuration of components and parts, thereby improve the reliability of system.Adopt the topological structure of semi-bridge inversion in addition, with the IGBT power device is the inversion element, make work be in soft on off state, and the new type ultrasonic plastic welding power supply that adopts the shift power control algolithm to be developed, have from the motion tracking load resonant frequency, in addition, can also realize the automatic storage and the automatic fault diagnosis of service data, help to realize the intellectuality of power electronic equipment operation.This ultrasonic welding machine control system ground power output constant and adjustable, the efficient height, harmonic pollution is little, stable and reliable working performance, the adaptive load ability is strong, and is easy to use, have very strong practicality, the technology of its application and product are being represented the developing direction of ultrasonic-frequency power supply from now on.
Description of drawings
Fig. 1 be this ultrasonic welding machine the functional-block diagram of control system.
The specific embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figure 1, the control system of this ultrasonic welding machine, comprise inverter, ultrasonic transducer and central processing unit, be connected with step-up transformer and frequency-tracking control system between inverter and the ultrasonic transducer, offering ultrasonic transducer after the voltage of inverter output boosts by step-up transformer uses, ultrasonic transducer can send by the frequency-tracking control system in real time and feed back signal to inverter, be connected with the sensor that is used for testing tool head output frequency that is installed on the tool heads between ultrasonic transducer and the central processing unit, be connected with wave filter between sensor and the central processing unit, inverter all links to each other with central processing unit by detecting amplifier with step-up transformer, also be connected with the drive circuit of impulse generator and the work of driving inverter between inverter and the central processing unit, inverter also is connected with rectifier filter, and rectifier filter is connected with extraneous power supply.
During work, ultrasonic transducer is given inverter by the intrinsic frequency signal feedback that the frequency-tracking control system changes ultrasonic transducer in real time, after amplifying, the intrinsic frequency signal that will feed back to the variation of inverter by detecting amplifier is input to central processing unit, and carry out analyzing and processing with frequency signal of exporting from inverter and the detected frequency signal that behind filter filtering, feeds back to central processing unit of tool heads upper sensor and calculate, central processing unit carries out on-line measurement to these frequency signals, identification, onlinely utilize recurrent least square method to carry out parameter to know and to debate, revise the control parameter simultaneously, adopt the minimum variance control law, and pass through Adaptable System, go out controlled quentity controlled variable and according to the rules program changes systematic parameter according to detected each calculation of parameter, controlled frequency with the DDS outputting standard comes regulating frequency, the frequency that makes impulse generator is the resonant frequency of tracking system well, thereby has guaranteed that ultrasonic welding machine is stable, efficiently, high-quality work.
The minimum variance control law that adopts in the present embodiment can also adopt the POLE PLACEMENT USING control law.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technical staff of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (6)
1. the control system of a ultrasonic welding machine, comprise inverter, ultrasonic transducer and central processing unit, described inverter is connected with ultrasonic transducer with central processing unit respectively, it is characterized in that, be connected with the frequency-tracking control system of feeding back real-time control when being used for resonance between described inverter and the ultrasonic transducer, be connected with the sensor that is used to detect frequency signal that is installed in tool heads between described ultrasonic transducer and the central processing unit, above-mentioned inverter is with voltage, current signal parameter and sensor all are input to the frequency signal parameter at tool heads place and handle the back in the central processing unit and calculate controlled quentity controlled variable, also are connected with the impulse generator that is used for producing according to controlled quentity controlled variable the frequency pulse signal between inverter and central processing unit.
2. the control system of a kind of ultrasonic welding machine according to claim 1 is characterized in that, also is connected with step-up transformer between described inverter and the ultrasonic transducer.
3. the control system of a kind of ultrasonic welding machine according to claim 2, it is characterized in that, also be connected with detecting amplifier between described inverter and the central processing unit, step-up transformer all with after detecting amplifier is connected is input in the central processing unit with inverter.
4. according to the control system of claim 1 or 2 or 3 described a kind of ultrasonic welding machines, it is characterized in that, also be connected with wave filter between described sensor and the central processing unit.
5. according to the control system of claim 1 or 2 or 3 described a kind of ultrasonic welding machines, it is characterized in that the input end of described inverter is connected with rectifier filter.
6. according to the control system of claim 1 or 2 or 3 described a kind of ultrasonic welding machines, it is characterized in that, also be connected with drive circuit between described impulse generator and the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910098289 CN101574757B (en) | 2009-05-01 | 2009-05-01 | Control system of ultrasonic welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910098289 CN101574757B (en) | 2009-05-01 | 2009-05-01 | Control system of ultrasonic welding machine |
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| CN101574757A true CN101574757A (en) | 2009-11-11 |
| CN101574757B CN101574757B (en) | 2013-05-22 |
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| CN 200910098289 Expired - Fee Related CN101574757B (en) | 2009-05-01 | 2009-05-01 | Control system of ultrasonic welding machine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103051331A (en) * | 2012-12-14 | 2013-04-17 | 华南理工大学 | Phase locking circuit for ultrasonic power supply |
| TWI480111B (en) * | 2012-12-27 | 2015-04-11 | Metal Ind Res & Dev Ct | A vibration processing apparatus and a vibration driving module thereof |
| CN105706007A (en) * | 2013-11-04 | 2016-06-22 | 伊利诺斯工具制品有限公司 | System and method for selecting weld parameters |
| CN105954585A (en) * | 2016-04-22 | 2016-09-21 | 广东顺威精密塑料股份有限公司 | Ultrasonic power supply automatic frequency tracking system based on single-chip microcomputer (SCM) control |
| CN107160697A (en) * | 2017-06-09 | 2017-09-15 | 镇江宇神动力能源有限公司 | A kind of ultrasonic welding machine and application method |
| CN108327296A (en) * | 2018-01-31 | 2018-07-27 | 大连交通大学 | A kind of the ultrasonic precision sealing-in device and method of feature based wavelet |
| CN108393574A (en) * | 2018-05-09 | 2018-08-14 | 北京航天东方科技发展有限公司 | ultrasonic welding machine |
| CN109290672A (en) * | 2018-10-09 | 2019-02-01 | 湖南机电职业技术学院 | A kind of Metal Material Welding method and control system based on ultrasonic bonding |
| CN110340050A (en) * | 2019-06-28 | 2019-10-18 | 中广核工程有限公司 | It is a kind of for branch pipe weld seam Overlay built-up welding with weldering cleaning and welding bead apparatus for shaping |
| CN111386170A (en) * | 2017-11-29 | 2020-07-07 | 远程声波控股公司 | Ultrasonic machining apparatus, method of configuring ultrasonic machining apparatus, and system having ultrasonic machining apparatus |
| CN111958098A (en) * | 2020-09-01 | 2020-11-20 | 河南理工大学 | Multifunctional adjustable ultrasonic welding system for tabs |
| CN113677473A (en) * | 2019-04-09 | 2021-11-19 | 利萨·德雷克塞迈尔有限责任公司 | Device for determining the state of an ultrasonic welding process |
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| IT201900025810A1 (en) * | 2019-12-31 | 2021-07-01 | Sonic Italia S R L | ELECTRONIC DEVICE FOR PILOTING AND CONTROL OF A VIBRATING UNIT OF AN ULTRASONIC WELDING MACHINERY |
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2009
- 2009-05-01 CN CN 200910098289 patent/CN101574757B/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103051331B (en) * | 2012-12-14 | 2015-10-28 | 华南理工大学 | A kind of phase lock circuitry for ultrasonic power |
| CN103051331A (en) * | 2012-12-14 | 2013-04-17 | 华南理工大学 | Phase locking circuit for ultrasonic power supply |
| TWI480111B (en) * | 2012-12-27 | 2015-04-11 | Metal Ind Res & Dev Ct | A vibration processing apparatus and a vibration driving module thereof |
| CN105706007A (en) * | 2013-11-04 | 2016-06-22 | 伊利诺斯工具制品有限公司 | System and method for selecting weld parameters |
| CN105954585A (en) * | 2016-04-22 | 2016-09-21 | 广东顺威精密塑料股份有限公司 | Ultrasonic power supply automatic frequency tracking system based on single-chip microcomputer (SCM) control |
| CN107160697A (en) * | 2017-06-09 | 2017-09-15 | 镇江宇神动力能源有限公司 | A kind of ultrasonic welding machine and application method |
| JP7195319B2 (en) | 2017-11-29 | 2022-12-23 | テルソニック・ホールディング・アー・ゲー | Ultrasonic Machining Apparatus, Method for Configuring Ultrasonic Machining Apparatus, and System Having Ultrasonic Machining Apparatus of this Type |
| CN111386170A (en) * | 2017-11-29 | 2020-07-07 | 远程声波控股公司 | Ultrasonic machining apparatus, method of configuring ultrasonic machining apparatus, and system having ultrasonic machining apparatus |
| CN108327296B (en) * | 2018-01-31 | 2020-08-04 | 大连交通大学 | Ultrasonic precise sealing device and method based on characteristic wavelets |
| CN108327296A (en) * | 2018-01-31 | 2018-07-27 | 大连交通大学 | A kind of the ultrasonic precision sealing-in device and method of feature based wavelet |
| CN108393574A (en) * | 2018-05-09 | 2018-08-14 | 北京航天东方科技发展有限公司 | ultrasonic welding machine |
| CN109290672A (en) * | 2018-10-09 | 2019-02-01 | 湖南机电职业技术学院 | A kind of Metal Material Welding method and control system based on ultrasonic bonding |
| CN113677473A (en) * | 2019-04-09 | 2021-11-19 | 利萨·德雷克塞迈尔有限责任公司 | Device for determining the state of an ultrasonic welding process |
| CN113677473B (en) * | 2019-04-09 | 2024-02-13 | 利萨·德雷克塞迈尔有限责任公司 | Device for determining the state of an ultrasonic welding process |
| CN110340050A (en) * | 2019-06-28 | 2019-10-18 | 中广核工程有限公司 | It is a kind of for branch pipe weld seam Overlay built-up welding with weldering cleaning and welding bead apparatus for shaping |
| CN111958098A (en) * | 2020-09-01 | 2020-11-20 | 河南理工大学 | Multifunctional adjustable ultrasonic welding system for tabs |
| CN111958098B (en) * | 2020-09-01 | 2022-04-19 | 河南理工大学 | Multifunctional adjustable ultrasonic welding system for tabs |
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