CN205395147U - Control system of ultrasonic welding machine - Google Patents
Control system of ultrasonic welding machine Download PDFInfo
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- CN205395147U CN205395147U CN201620169577.XU CN201620169577U CN205395147U CN 205395147 U CN205395147 U CN 205395147U CN 201620169577 U CN201620169577 U CN 201620169577U CN 205395147 U CN205395147 U CN 205395147U
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- signal
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- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The utility model provides a control system of ultrasonic welding machine, this system includes signal acquisition circuit for gather the physical signalling of transducer, control circuit, the physical signalling of received signal acquisition circuit output, control circuit carries out analysis processes to the physical signalling, drive circuit receives the command signal of control circuit output, switching power supply circuit, drive circuit drives switching power supply circuit according to command signal, resonance matching circuit, receive switch output of the power supply circuit's the high -frequency voltage signal and the control signal of control circuit output, resonance matching circuit matches the processing according to control signal to the high -frequency voltage signal, the matching signal of resonance matching circuit output is received to the transducer, and the transducer is used for being mechanical energy with matching signal conversion. The utility model discloses a control system of ultrasonic welding machine has realized the use of transducer under multiple frequency, has reduced the cost of producer, can improve the sensitivity of observing and controlling.
Description
Technical field
The present invention relates to intelligent measurement and control field, especially relate to the control system of a kind of multi-frequency ultrasonic welding machine.
Background technology
Ultrasound wave plastic welding is to utilize ul-trasonic irradiation when thermoplastic plastic contact surface, the dither of several ten thousand times per second can be produced, this dither, by upper weldment, ultrasonic energy is sent to welding zone, owing to the interface place acoustic resistance of welding zone that is two welding is big, therefore can produce localized hyperthermia, cause the contact surface of two plastics to melt rapidly, after certain pressure, will be fused into one.After ultrasound wave fails, allowing pressure continue several seconds so that it is coagulation forming, thus form a firm strand, reach the purpose of welding, weld strength can close to raw material intensity.Ultrasonic bonding is widely used by a lot of industries because of advantages such as it is quick, environmental protection, cleanings.
Ultrasonic equipment power supply, is different from other kinds of alternating current power supply, and the sine voltage frequency of its output with the resonant frequency Complete Synchronization of transducer mould self, otherwise must can make transducer device and ultrasonic power self damage.Again owing to transducer mould frequency when being subject to the pressure in the external world also can change with pressure size therewith, this has more sensitive measure and control device with regard to an urgent demand TT&C system.
Prior art is generally adopted self-oscillation amplifying type operating circuit, but the shortcoming of amplifying type circuit is inefficiency, amplifier tube heating is serious, and the frequency of self-oscillation circuit can not external control, it is difficult to automatic frequency tracking, also often occurs stopping the phenomenons such as shake (i.e. so-called dead ripple phenomenon).
Market also there are some application PHASE-LOCKED LOOP PLL TECHNIQUE solve frequency-tracking problem, but these technology are only all solve the Single-issue of certain equipment, a lot of problems are in fact also had to need to solve, simply these problems are not taken seriously, frequency matching problem of such as transducer mould zero load identification, die pressure size detection, transducer and mould machine etc., and the identification of these data and observing and controlling, often whether stablize relevant with device energy conservation and system, also there's sth behind all this for minor issue in fact.More it is worth noting that the ultrasonic equipment on market can not realize a tractor serves several purposes, when such as user needs to change multi-frequency ultrasonic transducer, have to buy neat required product specification kind for this user, while increasing buying expenses, also bring extra expense to production maintenance.
Summary of the invention
The main purpose of the present invention is to provide a kind of multifrequency ultrasonic welding machine and controls system.
In order to realize above-mentioned main purpose, ultrasonic welding machine provided by the invention controls system and includes signal acquisition circuit, for gathering the physical signalling of transducer；Control circuit, receives the physical signalling of signal acquisition circuit output, and physical signalling is analyzed processing by control circuit；Drive circuit, receives the command signal of control circuit output；Switching power circuit, drive circuit drives switching power circuit according to command signal；Resonant matching circuit, receives the high-frequency voltage signal of switching power circuit output and the control signal of control circuit output, and high-frequency voltage signal is carried out matching treatment according to control signal by resonant matching circuit；Transducer receives the matched signal of resonant matching circuit output, and transducer is for being converted to mechanical energy by described matched signal.
From such scheme, the ultrasonic welding machine of the present invention controls system can by the transducer mould of different frequency under the observing and controlling of single-chip microcomputer, by switching the on and off switch of resonant capacitance, complete the coupling of resonant tank, allow each frequency transducer mould can when complete resonance normal operation, accomplish a tractor serves several purposes, save input cost for user.
One preferred scheme is that physical signalling includes current signal, voltage signal and/or phase signal.
From the foregoing, it will be observed that signal acquisition circuit includes the voltage signal of load and the current signal of load, wherein current signal is the electric current being gathered load by electric current loop；Voltage signal is the voltage signal of the load obtained by the mode of electric resistance partial pressure or capacitance partial pressure.
One preferred scheme is that control system also includes display circuit, the information of display circuit display transducer.
As from the foregoing, the ultrasonic welding machine of the present invention controls the display circuit of system, can Dynamic Announce transducer in the frequency of wire bonding, display and operation weld interval, pressure time, mould air-cooled time, it is also possible to the contents such as the display quantity of welding product, ultrasonic amplitude size and state alarm.
One preferred scheme is that control circuit includes PWM generator, and PWM generator exports the first pwm signal and the second pwm signal to drive circuit.
One preferred scheme is, drive circuit includes the first transformator and the second transformator, and PWM generator exports the first pwm signal to the first transformator, and PWM generator exports the second pwm signal to the second transformator；First transformator exports the first square-wave signal, and the second transformator exports the second square-wave signal, and the amplitude of the first square-wave signal is identical with the amplitude of the second square-wave signal, the opposite in phase of the phase place of the first square-wave signal and the second square-wave signal.
As from the foregoing, the PWM generator of control circuit and accessory circuit output two-way pwm signal, this two paths of signals delivers to the former limit of the first driving transformer and the second driving transformer respectively, exporting by the secondary of the first driving transformer and the second driving transformer that two-way is equal in magnitude, the square-wave signal of opposite in phase, this two paths of signals drives upper arm field effect transistor and the underarm field effect transistor of power half-bridge switch power source circuit respectively.
One preferred scheme is, switching power circuit includes the 3rd transformator, first electric capacity, second electric capacity, 3rd electric capacity, first field effect transistor and the second field effect transistor, the source electrode of the first field effect transistor and the drain electrode of the second field effect transistor connect, first end of the first electric capacity and the source electrode of the first field effect transistor connect, second end of the first electric capacity and the former limit of the 3rd transformator connect, first end of the second electric capacity and the first end of the 3rd electric capacity connect, the drain electrode of the first field effect transistor and the second end of the second electric capacity connect power end respectively, the secondary of the first termination the 3rd transformator of the second electric capacity, the source electrode of the second field effect transistor and the second end ground connection of the 3rd electric capacity.
From the foregoing, it will be observed that the switching tube being made up of field effect transistor can make up half-bridge circuit or full-bridge circuit, the power end of connection is rectification high pressure 308V.
One preferred scheme is, resonant matching circuit includes resonant inductance and multiple capacitance group, first end of resonant inductance and the secondary of the 3rd transformator connect, it is connected in parallel between multiple capacitance group, capacitance group includes at least one electric capacity and the switch of capacitances in series connection, first end of capacitance group is connected with the second end of resonant inductance, the secondary of the second termination the 3rd transformator of capacitance group.
From the foregoing, it will be observed that the capacitance group of resonant matching circuit can form different charge circuit combinations by the ground connection switched and disconnection, it can mate the transducer mould of different frequency, wherein switches on-off and is controlled by control circuit.
Accompanying drawing explanation
Fig. 1 is the system block diagram that ultrasonic welding machine of the present invention controls system embodiment.
Fig. 2 is that ultrasonic welding machine of the present invention controls the circuit diagram of drive circuit in system embodiment.
Fig. 3 is the circuit diagram that ultrasonic welding machine of the present invention controls system embodiment breaker in middle power circuit.
Fig. 4 is that ultrasonic welding machine of the present invention controls the circuit diagram of resonant matching circuit in system embodiment.
Fig. 5 applies ultrasonic welding machine of the present invention to control the method flow diagram of system embodiment.
Below in conjunction with drawings and Examples, the invention will be further described.
Detailed description of the invention
Referring to Fig. 1, Fig. 1 is the system block diagram that ultrasonic welding machine of the present invention controls system embodiment, the ultrasonic welding machine of the present invention controls system and includes signal acquisition circuit 1, control circuit 2, drive circuit 3, switching power circuit 4, resonant matching circuit 5, transducer 6 and display circuit 7, and wherein control circuit includes PWM generator 21.Signal acquisition circuit 1 is for gathering the physical signalling of transducer 6；Control circuit 2 receives the physical signalling of signal acquisition circuit 1 output, and physical signalling is analyzed processing by control circuit 2；Drive circuit 3 receives the command signal of control circuit output, and drive circuit 3 drives switching power circuit 4 according to command signal；Switching power circuit 4 output high voltage signal；Resonant matching circuit 5 receives the high-frequency voltage signal of switching power circuit 4 output and the control signal of control circuit 2 output, and high-frequency voltage signal is carried out matching treatment according to control signal by resonant matching circuit 5；Transducer 6 receives the matched signal of resonant matching circuit 5 output, and transducer 6 is for being converted to mechanical energy by matched signal.
Signal acquisition circuit 1, signal acquisition circuit 1 gathers the physical signalling of load, wherein physical signalling includes current signal, voltage signal and/or phase signal, signal acquisition circuit 1 gathers the current signal of load by electric current loop, is gathered the voltage signal obtaining load by the mode of electric resistance partial pressure or capacitance partial pressure.
Control circuit 2, the current signal and the voltage signals that gather signal acquisition circuit 1 are analyzed and process, and the data of analysis include the input voltage of transducer 6, the output electric current of transducer 6, the amplitude fluctuation size of load, the current phase of load, the voltage-phase of load and load whether unloaded etc.；Control circuit 2 is made up of microprocessor and accessory circuit, and control circuit 2 includes PWM generator, and PWM generator and accessory circuit output two-way pwm signal are to drive circuit 3.
Drive circuit 3, drive circuit 3 is made up of the first transformator B1 and the second transformator B2, below in conjunction with Fig. 2, ultrasonic welding machine of the present invention is controlled drive circuit 3 in system embodiment to illustrate, the PWM generator 21 of control circuit 2 and accessory circuit output two-way pwm signal, PWM generator 21 exports the first pwm signal to the first transformator B1, and PWM generator 21 exports the second pwm signal to the second transformator B2；First transformator B1 exports the first square-wave signal, second transformator B2 exports the second square-wave signal, the amplitude of the first square-wave signal is identical with the amplitude of the second square-wave signal, the opposite in phase of the phase place of the first square-wave signal and the second square-wave signal, first square-wave signal drives the first field effect transistor N1 of power half-bridge switch power source circuit 4, and the second square-wave signal drives the second field effect transistor N2 of power half-bridge switch power source circuit 4.
nullSwitching power circuit 4，Including the 3rd transformator B、First electric capacity C5、Second electric capacity C6、3rd electric capacity C7、First field effect transistor N1 and the second field effect transistor N2，Below in conjunction with Fig. 3, ultrasonic welding machine of the present invention is controlled system embodiment breaker in middle power circuit 4 to illustrate，The source electrode of the first field effect transistor N1 shown in Fig. 3 and the drain electrode of the second field effect transistor N2 connect，First end of the first electric capacity C5 and the source electrode of the first field effect transistor N1 connect，Second end of the first electric capacity C5 and the former limit of the 3rd transformator B connect，First end of the second electric capacity C6 and first end of the 3rd electric capacity C7 connect，The drain electrode of the first field effect transistor N1 and the second termination power end of the second electric capacity C6，The secondary of first termination the 3rd transformator B of the second electric capacity C6，The second end ground connection of the second field effect transistor N2 and the three electric capacity C7.Switching power circuit 4 is source generating unit, the energy secondary output by the 3rd transformator B of high-frequency isolation, secondary one end ground connection of the 3rd transformator B of high-frequency isolation, other end output high frequency square wave voltage, this voltage arrives resonant matching circuit 5 by resonant inductance L1.
Resonant matching circuit 5, resonant matching circuit 5 includes resonant inductance L1 and multiple capacitance group, below in conjunction with Fig. 4, ultrasonic welding machine of the present invention is controlled resonant matching circuit 5 in system embodiment to illustrate, resonant matching circuit shown in Fig. 4 is provided with four groups of capacitance group, first end of resonant inductance L1 and the secondary of the 3rd transformator B connect, it is connected in parallel between multiple capacitance group, each capacitance group includes at least one electric capacity and the switch of capacitances in series connection, first end of capacitance group is connected with second end of resonant inductance L1, the secondary of the second termination the 3rd transformator B of capacitance group.Connect in parallel or in series between multiple electric capacity and separately constitute the first equivalent capacity C11, the second equivalent capacity C12, third equivalent electric capacity C13 and the 4th equivalent capacity C14, first equivalent capacity C11 and the first switch K1 series connection, second equivalent capacity C12 connects with second switch K2, and the switch K3 series connection of third equivalent electric capacity C13 and the three and the 4th equivalent capacity C14 and the four switch K4 connect.In first group of capacitance group, first end of first end of the first equivalent capacity C11 and the first switch K1 connects, and second end of the first equivalent capacity C11 is connected with second end of resonant inductance L1, the secondary of second termination the 3rd transformator B of the first switch K1.It is left the connected mode of the connected mode with the connected mode of switch, equivalent capacity and resonant inductance L1 of the equivalent capacity in three groups of capacitance group and switch and the 3rd transformator B, all identical with the connected mode in the first above-mentioned capacitance group.Wherein four groups of resonant capacitance groups have corresponding frequency, according to resonance equation are:
;
Can be calculated, owing to L represents resonant inductance in formula, L is certain value, often changes the C value of a resonant capacitance, and corresponding to obtain a resonant frequency be the value of f, and the transducer 6 that any a frequency is f can find the resonant capacitance C matched.
Transducer 6, general ultrasonic transducer has 15KHz, 20KHz, 30KHz, 35KHz, 40KHz etc., transducer 6 mould of these different frequencies is under the observing and controlling of single-chip microcomputer, by switching the switch K of the break-make of the equivalent capacity C of resonant matching circuit, complete the coupling of resonant tank, allow each frequency transducer 6 mould can when complete resonance normal operation.
Display circuit 7, it is possible to Dynamic Announce transducer 6 is in the frequency of wire bonding, display and operation weld interval, pressure time, mould air-cooled time, it is also possible to the contents such as the display quantity of welding product, ultrasonic amplitude size and state alarm.
Illustrate below in conjunction with Fig. 5 method flow diagram that the ultrasonic welding machine of the present invention is controlled system, step S1 is first carried out, signal acquisition circuit 1 gathers the physical signalling of transducer 6, physical signalling includes voltage signal, current signal and/or phase signal, then step S2 is performed, voltage signal and current signal are sent to control circuit 2 by signal acquisition circuit 1, next step S3 is performed, voltage signal and current signal according to transducer 6 judge whether load has transducer 6 to exist, it is then perform step S5, continue the voltage of detection transducer 6, size of current and phase data, and these data are sent to control circuit 2, otherwise perform step S4, ultrasonic welding machine controls system and performs shutdown command.Step S6 is performed after execution of step S5, the corresponding resonant matching network of control circuit 2 selective resonance match circuit 4 and transducer 6 match, and then the resonant network of locking coupling, finally perform step S7, control circuit 2 is by adjusting the phase relation of electric current and voltage, and the real-time cooperation by digital circuit and single-chip microcomputer realizes automatic frequency tracking.
Above-mentioned automatic frequency tracking is embodied in, and along with increase or the reduction of transducer 6 pressure, frequency can change along with the change of pressure, and transducer 6 is completely in resonant condition, and the scope of automatic frequency tracking is generally located on ± about 500HZ.
Therefore, the ultrasonic welding machine of the present invention controls system and achieves the use of transducer under multi-frequency, reduces the cost of producer, it is possible to increase the sensitivity of observing and controlling.
Claims (7)
1. ultrasonic welding machine controls system, it is characterised in that including:
Signal acquisition circuit, for gathering the physical signalling of transducer；
Control circuit, receives the described physical signalling of described signal acquisition circuit output, and described physical signalling is analyzed processing by described control circuit；
Drive circuit, receives the command signal of described control circuit output；
Switching power circuit, described drive circuit drives described switching power circuit according to described command signal；
Resonant matching circuit, receives the high-frequency voltage signal of described switching power circuit output and the control signal of described control circuit output, and described high-frequency voltage signal is carried out matching treatment according to described control signal by described resonant matching circuit；
Described transducer receives the matched signal of described resonant matching circuit output, and described transducer is for being converted to mechanical energy by described matched signal.
2. ultrasonic welding machine according to claim 1 controls system, it is characterised in that:
Described physical signalling includes current signal, voltage signal and/or phase signal.
3. ultrasonic welding machine according to claim 1 controls system, it is characterised in that:
Described control system also includes display circuit, and described display circuit shows the information of described transducer.
4. ultrasonic welding machine according to claim 1 controls system, it is characterised in that:
Described control circuit includes PWM generator, and described PWM generator exports the first pwm signal and the second pwm signal to drive circuit.
5. ultrasonic welding machine according to claim 4 controls system, it is characterised in that:
Described drive circuit includes the first transformator and the second transformator, and described PWM generator exports described first pwm signal to described first transformator, and described PWM generator exports described second pwm signal extremely described second transformator；
Described first transformator exports the first square-wave signal, described second transformator exports the second square-wave signal, the amplitude of described first square-wave signal is identical with the amplitude of described second square-wave signal, the opposite in phase of the phase place of described first square-wave signal and described second square-wave signal.
6. the ultrasonic welding machine according to any one of claim 1 to 5 controls system, it is characterised in that:
Described switching power circuit includes the 3rd transformator, first electric capacity, second electric capacity, 3rd electric capacity, first field effect transistor and the second field effect transistor, the source electrode of described first field effect transistor and the drain electrode of described second field effect transistor connect, first end of described first electric capacity is connected with the source electrode of described first field effect transistor, second end of described first electric capacity is connected with the former limit of described 3rd transformator, first end of described second electric capacity is connected with the first end of described 3rd electric capacity, the drain electrode of described first field effect transistor and the second end of described second electric capacity connect power end respectively, the first of described second electric capacity terminates the secondary of described 3rd transformator, the source electrode of described second field effect transistor and the second end ground connection of described 3rd electric capacity.
7. ultrasonic welding machine according to claim 6 controls system, it is characterised in that:
Described resonant matching circuit includes resonant inductance and multiple capacitance group, first end of described resonant inductance is connected with the secondary of described 3rd transformator, it is connected in parallel between multiple described capacitance group, described capacitance group includes at least one electric capacity and the switch of described capacitances in series connection, first end of described capacitance group is connected with the second end of described resonant inductance, and the second of described capacitance group terminates the secondary of described 3rd transformator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620169577.XU CN205395147U (en) | 2016-03-04 | 2016-03-04 | Control system of ultrasonic welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620169577.XU CN205395147U (en) | 2016-03-04 | 2016-03-04 | Control system of ultrasonic welding machine |
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| CN205395147U true CN205395147U (en) | 2016-07-27 |
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| CN201620169577.XU Withdrawn - After Issue CN205395147U (en) | 2016-03-04 | 2016-03-04 | Control system of ultrasonic welding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105563808A (en) * | 2016-03-04 | 2016-05-11 | 珠海灵科自动化科技有限公司 | Control system of ultrasonic welding machine |
| CN113001003A (en) * | 2021-04-16 | 2021-06-22 | 东莞声索电子有限公司 | Nonlinear output power device of ultrasonic power supply |
-
2016
- 2016-03-04 CN CN201620169577.XU patent/CN205395147U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105563808A (en) * | 2016-03-04 | 2016-05-11 | 珠海灵科自动化科技有限公司 | Control system of ultrasonic welding machine |
| CN113001003A (en) * | 2021-04-16 | 2021-06-22 | 东莞声索电子有限公司 | Nonlinear output power device of ultrasonic power supply |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160727 Effective date of abandoning: 20180626 |
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| AV01 | Patent right actively abandoned |