CN200951483Y - Self-adaption, impulse, contravariant carbon dioxide fusion arc welding machine - Google Patents
Self-adaption, impulse, contravariant carbon dioxide fusion arc welding machine Download PDFInfo
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- CN200951483Y CN200951483Y CN 200620034953 CN200620034953U CN200951483Y CN 200951483 Y CN200951483 Y CN 200951483Y CN 200620034953 CN200620034953 CN 200620034953 CN 200620034953 U CN200620034953 U CN 200620034953U CN 200951483 Y CN200951483 Y CN 200951483Y
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Abstract
A self-adaptable impulse inversion CO 2 melting pole arc welder is provided in order to solve the problems of large welding splash and bad stability during middle and large electric current. The power supply is provided with a power frequency rectifier filter circuit, an IGBT or MOSFET pipe inverter and a high-frequency voltage-reducing and rectifier circuit. The control part is provided with a current automatic selection circuit 10 to put through constant-voltage wave-controlled circuit during small electric current; the self-adaptable impulse circuit is put trough during middle and large electric current and is output by the given voltage, feedback voltage and feedback current signal; the output terminal of circuit 10 is sent to the inverter through the PI circuit, PWM impulse width adjusting and drive circuit; the full current is applied to control the change rate to implement the small splashing, flexibility and the stability when welding. The IGBT pipe with the inversion frequency of 28 KHz and more is adopted to make higher power supply dynamic response characteristic. The PWM is adopted to exactly control the wire feeding speed to make the speed more stable and to obtain the good welding performance in the full current range. The utility model is suitable for the belting pole (such as MIG/MAG) arc welder which is provided with the protection weld of the inversion power supply CO 2.
Description
(1) technical field: the utility model relates to welding technology field, is a kind of CO
2Consumable electrode (MIG/MAG) gas shield welding machine, and make Arc Welding Power with the inversion direct current power supply.Belong to welding class (B23K).
(2) background technology:
Having adopted inversion transformation technique in 80～nineties on the domestic arc-welding machine, promptly is to have added following new-type electronic component (see figure 2) in arc welding power supply: igbt (being called for short the IGBT pipe) or mos field effect transistor (being called for short MOSFET).Become inverter thus, its function is: it improves frequency (can bring up to 20KHz-100KHz) with the filtered alternating voltage break-make in three-phase main-frequency commercial power rectification and becomes the used output DC source of welding machine through high frequency voltage descending and rectification circuit again.The arc welding power supply volume of transformer is reduced greatly, and electrical efficiency improves; And output current fluctuation is little, and the arc stability when the little electric current of output improves; Also determined simultaneously power supply have high dynamic response characteristic (because of the inverter dynamic response time suitable with the arc welding time constant, be hundred microsecond levels, and the triode thyristor Arc Welding Power cycle is 3.3ms) thus for the accurate control of welding arc become may with create conditions.See Fig. 8, Fig. 9, be respectively inverter type welder current waveform figure I when little electric current is exported
0(t) and voltage oscillogram U
0(t).As can be seen from Figure 8 at 2.-4. current-rising-rate DI/Dt controlled (not controlling current-rising-rate when dotted line is non-inverter among the figure) of shorted segment, thereby produce certain effect that reduces spatter.
But the little electric current welding performance of many similar inverter type welder ubiquities makes moderate progress at present, and in, electric arc is hot-tempered during the welding of big current standard, coarse granule splashes, poor stability, molten iron＜burning etc. problem so that the what inverter type welder that is operated in big electric current is also poorer than the arc-welding machine welding performance of traditional controllable silicon phase-shifting commutation and big mechanical reactance device power supply.
(3) summary of the invention: the self adaptation pulse inversion CO that the utility model proposes
2Arc welding machine using a consumable electrode, be exactly solve existing inverter type welder in, the relatively poor problem of welding performance during big electric current.Its technical scheme is as follows:
Self adaptation pulse inversion CO
2Arc welding machine using a consumable electrode, comprise: industrial frequency rectifying filter circuit 1, inverter 2, drive circuit 4, high frequency voltage descending and rectification circuit 3, control section, it is characterized in that described control section comprises following circuit: establish big or small electric current automatic selection circuit 10, an input of selecting is connected constant voltage ripple control circuit 8, and another input of selection is connected self adaptation impulse circuit 9; The voltage feedback circuit 5 that is connected with high frequency voltage descending and rectification circuit 3 outputs and the output of current feedback circuit 6, all be connected for determining voltage signal 7 with self adaptation impulse circuit 9 inputs, and establish ripple control given circuit 11 and link to each other with two circuit 8 or 9 and control startup with constant voltage ripple control circuit 8; From the output of automatic selection circuit 10, connect PWM pulse width regulating circuit 13, drive circuit 4, inverter 2 in turn by the output input.
Between above-mentioned automatic selection circuit 10 and PWM pulse width regulating circuit 13, can establish PI control circuit 12.
Be provided with electronic switch in the above-mentioned electric current automatic selection circuit 10, and the conversion setting value accesses parameter value for system's soldering test with the what conversion.Also can establish wire feeding motor control circuit 15 in the above-mentioned welding machine, comprise following part: wire-feed motor output services voltage returns current feed circuit 15.1 and electric current returns current feed circuit 15.2 and the given voltage 15.3 of wire feed is all imported wire feed PI control circuit 15.4 inputs that are provided with, and its output is established wire feed PWM pulse width regulating circuit 15.5 and wire-feed motor drive circuit 15.6 in turn.
Above-mentioned control section also can be established starting the arc control circuit 14, inserts the output of automatic selection circuit 10; Can establish and receive arc control circuit 15 access constant voltage ripple control circuit 8 and self adaptation impulse circuit 9 inputs.
Above-mentioned constant voltage ripple control circuit 8 is made up of constant voltage circuit 8.1, short circuit ripple control circuit 8.2, short circuit decision circuit 8.3.Above-mentioned self adaptation impulse circuit 9 is produced by constant voltage integrating circuit 9.0, impulse waveform generation circuit 9.1, impulse waveform treatment circuit 9.2 and composite pulse and output circuit 9.3 is formed.
All circuit insulated parts of above-mentioned arc-welding machine can adopt the F class F insulating material F.Siemens the 4th generation IGBT module that above-mentioned inverter 2 adopts or employing MOSFET, reverse frequency can reach 28KHZ.
The utility model beneficial effect:
1. in, big operating current section realizes pulse current control with automaticallying switch.This moment, output current became pulse current automatically, spurt into the molten bath with pulse current peak by molten drop, realize the fusing of welding wire, workpiece and the cooling in molten bath with background current, prevented the coarse granule molten drop short circuit that traditional generation bulky grain splashes thus, and then weld seam ' scaling loss ', quality problem rambunctious have been avoided.Splash during big electric current welding in the realization little, electric arc is soft, arc stability good; The current/voltage scope of application is wide, does not influence the fired state and the stability of electric arc when the bar variable elongation is big.2. adopted the PWM pulsewidth to adjust control circuit, it is according to the advanced Waveform Control theory of CO2, MIG/MAG welding, required accurate output current wave control circuit when designing short circuiting arc welding has further fundamentally solved welding machine arc burning stability and problem of splashing when little electric current welding thus again.3. wire-feeding control circuit adopts " PWM " mode to control electric moter voltage and realizes accurately controlling wire feed rate and adjustable purpose, makes wire feed more stable.4. design special starting the arc control circuit and receive the arc control circuit, make the starting the arc smooth-going, receive arc and do not have bead.5. adopt high performance F class F insulating material F, the dielectric strength height, heat resistance is good, dustproof, shockproof, moistureproof, anticorrosion, thus it is wide to guarantee that this welding machine has the scope of application, the excellent and high reliability of serviceability.6. special-purpose the 4th generation IGBT module of the inverter type welder that adopts Siemens to produce is used the advanced and applicable circuit engineering of powerful full-bridge inverting, and reverse frequency can be up to 28KHZ.The reverse frequency decision power supply of 28KHZ possesses the high dynamic response characteristics.7. the control system that provides of the utility model has solved inverter type welder all possessed the superior weldability energy in the total current working range.
(4) description of drawings:
The total block diagram of Fig. 1 the utility model
Fig. 2 inverter power circuit figure
Fig. 3 wire feed controlling party block diagram
Constant voltage ripple control circuit 8 circuit diagrams during the little electric current of Fig. 4
Self adaptation impulse circuit 9 circuit diagrams among Fig. 5, during big electric current
Little electric current output voltage and current waveform figure when Fig. 6 uses the utility model control system
Fig. 7 during with the utility model control system in, big electric current output voltage and current waveform figure
Fig. 8 has the little electric current output current wave of inverter welding machine figure now
Fig. 9 has the little electric current output voltage waveform of inverter welding machine now
(5) specific embodiment:
See Fig. 1, see Fig. 2, the utility model inverter comprises as the lower part: by diode D
11, D
12, D
13, D
14, D
15, D
16, capacitor C
1, form industrial frequency rectifying filter circuit 1; By the inverter 2 that IGBT manages or MOSFET manages, transformer T1 constitutes; By transformer T1, diode D
31, D
32, inductance L
3Form high frequency voltage descending rectification circuit 3 (following summary is a circuit 3).Three-phase 50Hz line voltage (380V) V～input is become the dc source V+ of output.See Fig. 1, the utility model power control part branch comprises: big or small electric current automatic selection circuit 10 (following summary is a circuit 10), optionally connected logical voltage wave control circuit 8 of its input (following summary is a circuit 8) or self adaptation impulse circuit 9 (following summary is a circuit 9) output, circuit 10 outputs connect PI control circuit 12, PWM pulse width regulating circuit 13, drive circuit 4 and inverter 2 (following summary respectively is circuit 12, circuit 13, circuit 4) in turn.And establish the voltage that links to each other with circuit 3 outputs and return current feed circuit 5 and return current feed circuit 6 (can adopt current sensor 5 and voltage sensor 6) with electric current and all be connected with circuit 9 inputs with circuit 8.And in circuit 8 and circuit 9, establish ripple control given circuit 11.
Above-mentioned PI control circuit 12 adopts the differential circuit of being made up of operational amplifier, resistance, electric capacity etc., to waveform shaping.This is that custom circuit no longer describes in detail.Be provided with electronic switch in the above-mentioned electric current automatic selection circuit 10, and the conversion setting value accesses parameter value for system's soldering test with the what conversion.
For making the arcing starting the arc smooth-going, receive arc and do not have bead, starting the arc control circuit 14 is set, the output of place in circuit 10; Be provided with and receive arc control circuit 15 places in circuit 8 and circuit 9 inputs.
See Fig. 3, in order to make wire-feed motor adjustable-speed joint, make wire feed more stable, in above-mentioned control circuit, can establish wire feeding motor control circuit 15, comprise: wire-feed motor output services voltage returns current feed circuit 15.1 and electric current returns current feed circuit 15.2 and wire feed given 15.3 all inserts wire feed PI control circuit 15.4 inputs that are provided with, its output is established wire feed PWM pulse width regulating circuit 15.5 and wire feeding motor drive circuit 15.6 in turn, offers the out-put supply of wire feeding motor thus.
See Fig. 4, circuit 8 is made up of constant voltage circuit 8.1, short circuit ripple control circuit 8.2 and short circuit decision circuit 8.3.Constant voltage circuit 8.1 is made of operational amplifier IC1, IC2B and R1～R7, capacitor C 1, diode D1.Short circuit ripple control circuit 8.2 (control of short circuit current waveform) is by electronic switch IC5B, IC5C, operational amplifier IC2C, IC2D, IC2A and resistance R 14～R23, capacitor C 3, (C2, C4 are that power supply removes lotus root electric capacity among Fig. 4), diode D2 and adjustable potentiometer W1 form.Short circuit decision circuit 8.3 keeps device V0, triode Q1, semifixed resistor VR1 and resistance R 8～R13 to constitute by comparator IC3A, NAND gate IC4A, IC4B, voltage.
See Fig. 4, when in little current conditions, be that output voltage is below 24V, below the welding current 200A, be achieved as follows constant voltage and the compound control of ripple control by circuit 8: during arcing, the difference of the voltage feedback signal that voltage given signal 7 and voltage sensor 6 provide obtains constant voltage control through the integration control of constant voltage circuit 8.1; Accurately judge the short circuit generation from voltage feedback signal and current feedback signal that the voltage and current sensor comes through short circuit decision circuit 8.3, automatically switch to short circuit ripple control circuit 8.2 again, realize control output short circuit current climbing Di/Dt then.This output short circuit current is again through circuit 10, PI control circuit 12, PWM pulse width regulating circuit 13, just the little electric current welding arc more optimized of obtained performance.See Fig. 6, the utility model welding machine output current wave is I during little electric current
1(t), output voltage waveforms is U
1(t).
See Fig. 5, the swollen circuit 9 of self adaptation arteries and veins is produced by constant voltage integrating circuit 9.0, impulse waveform generation circuit 9.1, impulse waveform treatment circuit 9.2 and composite pulse and output circuit 9.3 is formed.
Constant voltage integrating circuit 9.0 is by operational amplifier IC1C, IC1B, resistance R 1, R2, R8, R9, R10, and capacitor C 1 is formed.Impulse waveform treatment circuit 9.2 is by triode (switch) Q1, resistance R 3～R7, R12, R13, capacitor C 2～C4, and diode D1 forms.The impulse waveform output of impulse waveform generation circuit 9.1 is connected with triode (switch) Q1 base stage.Composite pulse produces and output circuit 9.3 is made up of operational amplifier IC1A, IC1D, R11, R14, R15, R16.
See Fig. 5, in, the situation of big electric current, voltage is more than 24V, welding current is more than 200A, adopt following complex pulse waveform control by circuit 9: during arcing, the difference of the voltage feedback signal that voltage given signal 7 and voltage sensor 6 provide provides constant voltage through constant voltage integral control circuit 9.1; Impulse waveform is introduced by triode Q1 base stage and is input in composite pulse generation and the output circuit 9.3 after pulse waveform processing circuit 9.2 is handled simultaneously, the electric current that while is provided by current sensor 5 returns feedback signal and also is input in composite pulse generation and the output circuit 9.3, just produce composite pulse through operational amplifier IC1A thus, amplify through operational amplifier IC1D again, the short circuit and the arcing process of the impulse waveform control electric current that adopts thus, make molten drop of transition under the pulse as far as possible, thereby obtain stablizing welding effect.This output short circuit current is again through circuit 10, PI control circuit 12, PWM pulse width regulating circuit 13, just obtained performance more optimize in big electric current welding arc.See Fig. 7, in, the utility model welding machine output current wave is I during big electric current
2(t), output voltage waveforms is U
2(t).
See Fig. 5, Fig. 6, pwm pulse width regulating circuit 13 is a kind of ripe functional chip, belongs to general custom circuit and no longer describes in detail here.
See Fig. 1, ripple control given circuit 11 is after circuit 10 selects switch to connect circuit 8 or circuit 9 automatically, again to circuit 8 or the circuit given signal of 9 incoming wave controls so that circuit 8 or circuit 9 startup work.See Fig. 4, Fig. 5, mainly establish adjustable potentiometer W in the ripple control given circuit 11
1Finish adjustable potentiometer W among Fig. 4
1Be located in the short circuit ripple control circuit 8.2.Adjustable potentiometer W during electric current big or middle
1Can be automatically switched in the impulse waveform generation circuit 9.1, be seen Fig. 5.
Claims (9)
1. self adaptation pulse inversion CO
2Arc welding machine using a consumable electrode comprises: industrial frequency rectifying filter circuit (1), inverter (2) and drive circuit (4), high frequency voltage descending and rectification circuit (3), and control section is characterized in that described control section comprises following circuit:
If big or small electric current automatic selection circuit (10), an input of selection is connected constant voltage ripple control circuit (8), and another input of selection is connected self adaptation impulse circuit (9); The voltage feedback circuit (5) that is connected with high frequency voltage descending and rectification circuit (3) output and the output of current feedback circuit (6), all be connected for determining voltage signal (7) with self adaptation impulse circuit (9) input, and establish ripple control given circuit (11) and link to each other with two circuit (8) or (9) and control startup with constant voltage ripple control circuit (8); Connect PWM pulse width regulating circuit (13), drive circuit (4), inverter (2) from the output of automatic selection circuit (10) in turn by the output input.
2. by the described arc-welding machine of claim 1, it is characterized in that between automatic selection circuit (10) and PWM pulse width regulating circuit (13), establishing PI control circuit (12).
3. by the described arc-welding machine of claim 1, it is characterized in that being provided with in the electric current automatic selection circuit (10) electronic switch, and the conversion setting value accesses parameter value for system's soldering test with the what conversion.
4. by the described arc-welding machine of claim 1, it is characterized in that establishing wire feed DC motor control circuit (15), comprise following part: wire-feed motor output services electric current returns current feed circuit (15.2) and voltage returns current feed circuit (15.1) and the given voltage of wire feed (15.3) is all imported wire feed PI control circuit (15.4) input that is provided with, and its output arrives wire feed PWM pulse width regulating circuit (15.5) and wire-feed motor drive circuit (15.6) in turn.
5. by the described arc-welding machine of claim 1, it is characterized in that establishing the output that starting the arc control circuit (14) connects automatic selection circuit (10); Connect constant voltage ripple control circuit (8) and self adaptation impulse circuit (9) input if receive arc control circuit (15).
6. by the described arc-welding machine of claim 1, it is characterized in that constant voltage ripple control circuit (8) is made up of constant voltage circuit (8.1), short circuit ripple control circuit (8.2), short circuit decision circuit (8.3).
7. by the described arc-welding machine of claim 1, it is characterized in that self adaptation impulse circuit (9) is produced and output circuit (9.3) by constant voltage integrating circuit (9.0), impulse waveform generation circuit (9.1), impulse waveform treatment circuit (9.2) and composite pulse.
8. by the described arc-welding machine of claim 1, it is characterized in that all circuit insulated parts of arc-welding machine adopt the F class F insulating material F.
9. by the described arc-welding machine of claim 1, it is characterized in that inverter (2) adopts the IGBT module, reverse frequency reaches 28KHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034953 CN200951483Y (en) | 2006-07-18 | 2006-07-18 | Self-adaption, impulse, contravariant carbon dioxide fusion arc welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620034953 CN200951483Y (en) | 2006-07-18 | 2006-07-18 | Self-adaption, impulse, contravariant carbon dioxide fusion arc welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN200951483Y true CN200951483Y (en) | 2007-09-26 |
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ID=38809780
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620034953 Expired - Fee Related CN200951483Y (en) | 2006-07-18 | 2006-07-18 | Self-adaption, impulse, contravariant carbon dioxide fusion arc welding machine |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626814A (en) * | 2011-02-07 | 2012-08-08 | 株式会社大亨 | Welding device and carbon dioxide gas shielded arc welding method |
| CN103801798A (en) * | 2014-03-05 | 2014-05-21 | 罗建坤 | Arc pressure sensing automatic welding head device |
| CN105562888A (en) * | 2016-01-27 | 2016-05-11 | 上海广为焊接设备有限公司 | Welding machine rated power limitation system based on dual PI inhibition |
| CN105689875A (en) * | 2016-03-26 | 2016-06-22 | 广州微点焊设备有限公司 | Three-axis linkage automatic welding equipment |
| CN105880819A (en) * | 2016-03-26 | 2016-08-24 | 广州微点焊设备有限公司 | Microscopic-welding point welding machine for hot-pressing electric resistance welding |
| CN106735735A (en) * | 2017-02-20 | 2017-05-31 | 上海威特力焊接设备制造股份有限公司 | Arc device and method is received in a kind of pulse gas-shielded weldering |
| CN106891075A (en) * | 2017-01-19 | 2017-06-27 | 上海广为焊接设备有限公司 | Control inverter type welder arc ignition system and its method of work |
| CN106925865A (en) * | 2017-02-20 | 2017-07-07 | 上海威特力焊接设备制造股份有限公司 | A kind of gas shielded arc welding receives arc device and method |
| CN110142487A (en) * | 2019-06-06 | 2019-08-20 | 深圳市普耐尔科技有限公司 | A kind of inverted gas protective welder of variable PWM frequency |
| CN110497063A (en) * | 2019-08-02 | 2019-11-26 | 上海沪工焊接集团股份有限公司 | A kind of reverse frequency adaptation control circuit and control method |
| CN111112799A (en) * | 2018-10-30 | 2020-05-08 | 林肯环球股份有限公司 | Two-stage pulse ramp |
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2006
- 2006-07-18 CN CN 200620034953 patent/CN200951483Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626814B (en) * | 2011-02-07 | 2016-03-16 | 株式会社大亨 | Welder and carbon dioxide arc welding method |
| CN102626814A (en) * | 2011-02-07 | 2012-08-08 | 株式会社大亨 | Welding device and carbon dioxide gas shielded arc welding method |
| CN103801798A (en) * | 2014-03-05 | 2014-05-21 | 罗建坤 | Arc pressure sensing automatic welding head device |
| CN103801798B (en) * | 2014-03-05 | 2015-08-19 | 罗建坤 | Arc voltage induction automatic welding machine head unit |
| CN105562888B (en) * | 2016-01-27 | 2017-07-11 | 上海广为焊接设备有限公司 | System is limited based on the welding machine rated power for suppressing double PI |
| CN105562888A (en) * | 2016-01-27 | 2016-05-11 | 上海广为焊接设备有限公司 | Welding machine rated power limitation system based on dual PI inhibition |
| CN105689875A (en) * | 2016-03-26 | 2016-06-22 | 广州微点焊设备有限公司 | Three-axis linkage automatic welding equipment |
| CN105880819A (en) * | 2016-03-26 | 2016-08-24 | 广州微点焊设备有限公司 | Microscopic-welding point welding machine for hot-pressing electric resistance welding |
| CN105880819B (en) * | 2016-03-26 | 2019-03-26 | 广州微点焊设备有限公司 | Hot pressing electric resistance welding micro welding contact welding machine |
| CN106891075A (en) * | 2017-01-19 | 2017-06-27 | 上海广为焊接设备有限公司 | Control inverter type welder arc ignition system and its method of work |
| CN106891075B (en) * | 2017-01-19 | 2019-07-12 | 上海广为焊接设备有限公司 | Control inverter type welder arc ignition system and its working method |
| CN106925865A (en) * | 2017-02-20 | 2017-07-07 | 上海威特力焊接设备制造股份有限公司 | A kind of gas shielded arc welding receives arc device and method |
| CN106735735A (en) * | 2017-02-20 | 2017-05-31 | 上海威特力焊接设备制造股份有限公司 | Arc device and method is received in a kind of pulse gas-shielded weldering |
| CN111112799A (en) * | 2018-10-30 | 2020-05-08 | 林肯环球股份有限公司 | Two-stage pulse ramp |
| CN110142487A (en) * | 2019-06-06 | 2019-08-20 | 深圳市普耐尔科技有限公司 | A kind of inverted gas protective welder of variable PWM frequency |
| CN110497063A (en) * | 2019-08-02 | 2019-11-26 | 上海沪工焊接集团股份有限公司 | A kind of reverse frequency adaptation control circuit and control method |
| CN110497063B (en) * | 2019-08-02 | 2021-09-10 | 上海沪工焊接集团股份有限公司 | Adaptive control circuit and control method for inversion frequency |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070926 Termination date: 20110718 |