CN102962548A - Pulse arc-stabilizing device of inverting alternating-current square-wave argon tungsten-arc welding machine - Google Patents
Pulse arc-stabilizing device of inverting alternating-current square-wave argon tungsten-arc welding machine Download PDFInfo
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- CN102962548A CN102962548A CN2012104799743A CN201210479974A CN102962548A CN 102962548 A CN102962548 A CN 102962548A CN 2012104799743 A CN2012104799743 A CN 2012104799743A CN 201210479974 A CN201210479974 A CN 201210479974A CN 102962548 A CN102962548 A CN 102962548A
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- 238000003466 welding Methods 0.000 title claims abstract description 25
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052786 argon Inorganic materials 0.000 title abstract 2
- 230000001360 synchronised effect Effects 0.000 claims abstract description 23
- 230000003019 stabilising effect Effects 0.000 claims description 63
- 239000003381 stabilizer Substances 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000007667 floating Methods 0.000 claims description 5
- 208000037516 chromosome inversion disease Diseases 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000004411 aluminium Substances 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000002242 deionisation method Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000002421 finishing Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a pulse arc-stabilizing device of an inverting alternating-current square-wave argon tungsten-arc welding machine, comprising a high-frequency power input unit, a double voltage rectification unit, an arc-stabilizing synchronous control unit and an arc-stabilizing pulse output unit, wherein the high-frequency power input unit is connected with the output end of a primary inverting switch tube; the double voltage rectification unit is connected with the output end of the high-frequency power input unit; the arc-stabilizing synchronous control unit is connected with the output end of a secondary inverting driving control circuit; and the arc-stabilizing pulse output unit is connected with the output end of the double voltage rectification unit. The pulse arc-stabilizing device disclosed by the invention has the advantages that the power energy needed by the an arc-stabilizing circuit is provided by adopting a main transformer, a double voltage rectifying circuit rectifies double voltage of a high-frequency alternating-current power supply of the main transformer into a high-voltage direct-current negative power supply with the voltage being 5 times of the no-load voltage of the welding machine, the arc-stabilizing synchronous control unit opens signals by detecting negative half waves of the alternating current and forms an arc-stabilizing pulse control signal with certain width, the arc-stabilizing pulse output unit provides certain arc-stabilizing pulse with fixed voltage, current and time for a welding circuit, the arc-breaking phenomenon of high-low current can be reliably eliminated, and good arc-stabilizing effect and higher cost performance are ensured.
Description
Technical field
The present invention relates to a kind of electric welding machine control technology, be specifically related to a kind of arc stabilizer that is applicable to half-bridge topology secondary inverting ac square wave TIG Welding Machine.
Background technology
Because that aluminium, magnesium and alloy material thereof have is corrosion-resistant, density is little, lightweight, the advantage such as mechanical property is good, more and more is subjected to people's welcome, especially is widely used in fields such as Aeronautics and Astronautics, nuclear energy, bridge, finishings.But the easily oxidation of surface of aluminium, magnesium and alloy material thereof, the oxide-film of formation one deck densification, the fusing point of this oxide-film is high and difficult broken than the fusing point of aluminium.Ac tungsten inert gases welding is mainly adopted in the welding of aluminium, magnesium and alloy material thereof both at home and abroad, can satisfy the cleaning action of the cathode of aluminium, can reduce again the loss of tungsten electrode.
The deficiencies in the prior art part is, in ac square wave TIG Welding Machine welding process, the polar cycle variation of welding current, current over-zero is reverse when positive and negative half-wave replaces, arc space generation deionization and restarting process, especially at welding current during less than 40A, when the electric current positive half-wave changes to negative half-wave, because the electron emissivity of weldment aluminium, magnesium and alloy material thereof is poor so that the electric arc resume combustion is difficult, arc extinction (being commonly called as " current interruption ") be will cause, welding procedure and welding efficiency had a strong impact on.
In order to solve the current interruption problem, just the arc stabilizer that electric arc is ignited again need to be arranged, method relatively more commonly used roughly has three kinds at present: 1, adopt full-bridge topology secondary inverting main circuit, utilize high-power filter inductance Bootstrap stabilising arc, but this method exists the secondary power consumption large, efficient is low, and ac square wave frequency adjustable extent is narrow, the defectives such as complete machine material cost height; 2, adopt the pulse of in good time overlapped high-frequency high pressure arc maintenance, but there is High-frequency Interference in this method, and human body and equipment are had very large injury; 3, newly-increased arc maintenance dc high-voltage circuit adopts Control, relay is connected when arc burning, this high direct voltage is put on the secondary inverting both ends of power continuously, turn-off this dc high-voltage circuit when unloaded, but this method exists circuit complicated, high type selecting that rectifying tube and secondary inverting switching tube are withstand voltage is difficult, and material cost is high, and will cause the arc maintenance effect unstable because of the work of control relay chronic fatigue.
Therefore, need especially a kind of arc stabilizer of ac square wave TIG Welding Machine, both possessed without High-frequency Interference harm, low in energy consumption, efficient is high, the material type selecting convenient, with low cost, can guarantee again high performance stabilising arc effect.
Summary of the invention
The object of the invention is to solve the alternating current arc shakiness, and the problem of the easy current interruption of little electric current can effectively overcome again High-frequency Interference harm problem and the defectives such as circuit is complicated, the material type selecting is difficult, the power consumption rate is low, job insecurity that existing welding machine exists simultaneously.
For achieving the above object, the invention provides a kind of ac square wave TIG Welding Machine pulse arc stabilizer, comprise high frequency electric source input block (100), voltage multiplying rectifier unit (200), stabilising arc synchronous control unit (300), and stabilising arc pulse output unit (400), wherein, the input of described high frequency electric source input block (100) is used for connecting an inverse switch pipe output, the input of described voltage multiplying rectifier unit (200) connects the output of described high frequency electric source input block (100), the input of described stabilising arc synchronous control unit (300) is used for connecting secondary inversion Drive and Control Circuit output, the input of described stabilising arc pulse output unit (400) connects the output of described stabilising arc synchronous control unit (300), and described voltage multiplying rectifier unit (200) connects described stabilising arc pulse output unit (400).
Preferably, described high frequency electric source input block (100) comprises main transformer stabilising arc winding (101) and the bond pattern gauge tap (102) that connects successively, wherein, described main transformer stabilising arc winding (101) is connected between a described inverse switch pipe output and the bond pattern gauge tap (102), and the output of described bond pattern gauge tap (102) is as the output of described high frequency electric source input block (100).
Preferably, described voltage multiplying rectifier unit (200) comprises described coupling capacitance (201), commutation diode (202) and the high-voltage filtering capacitor (203) that connects successively, wherein, described coupling capacitance (201) is connected between the output and described commutation diode (202) of described high frequency electric source input block (100).
Preferably, described stabilising arc synchronous control unit (300) comprises pulse front edge testing circuit (301) and the photoelectric isolating driving circuit (302) that connects successively, wherein, described pulse front edge testing circuit (301) is connected between described secondary inverting Drive and Control Circuit output and the described photoelectric isolating driving circuit (302), and the output of described photoelectric isolating driving circuit (302) is as the output of described stabilising arc synchronous control unit (300).
Preferably, described stabilising arc pulse output unit (400) comprises stabilising arc driving power circuit (401), stabilising arc gauge tap pipe (402), the stabilising arc current-limiting circuit (403) that connects successively, wherein, described stabilising arc driving power circuit (401) is connected between the output and described stabilising arc gauge tap pipe (402) of described stabilising arc synchronous control unit (300), and described stabilising arc gauge tap pipe (402) connects described high-voltage filtering capacitor (203).
Preferably, described voltage multiplying rectifier unit (200) is the HVDC negative polarity power supply that is multiple times than the welding machine floating voltage for the high-frequency ac power voltage multiplying rectifier that described high frequency electric source input block (100) is provided.
Preferably, described voltage multiplying rectifier unit (200) be used for the high-frequency ac power voltage multiplying rectifier that described high frequency electric source input block (100) provides be 5 times to the HVDC negative polarity power supply of welding machine floating voltage.
Preferably, described stabilising arc synchronous control unit (300) is used for bearing the stabilising arc pulse control signal that half-wave is opened signal and formed one fixed width by detecting alternating current.
Preferably, described employing stabilising arc pulse output unit (400) is used to welding circuit that voltage, electric current, certain stabilising arc pulse of time are provided.
Be compared with existing technology according to ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention, its advantage is, simple circuit of the present invention, with low cost, adopt main transformer to provide arc static circuit required power supply energy, adopt voltage doubling rectifing circuit with main transformer high-frequency ac power voltage multiplying rectifier be 5 times to the HVDC negative polarity power supply of welding machine floating voltage, the stabilising arc pulse control signal that adopts the stabilising arc synchronous control unit to open signal and form one fixed width by detecting the negative half-wave of alternating current, adopt stabilising arc pulse output unit to provide voltage for welding circuit, electric current, the stabilising arc pulse that time is certain, the current interruption phenomenon of current be can reliably eliminate, good stabilising arc effect and higher cost performance guaranteed.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the module diagram according to ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention;
Fig. 2 is the circuit theory diagrams according to ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention;
Fig. 3 is the secondary inverting output circuit schematic diagram according to ac square wave TIG Welding Machine provided by the invention.
The specific embodiment
Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing.Following examples will help those skilled in the art further to understand the present invention, but not limit in any form the present invention.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement.These all belong to protection scope of the present invention.
As shown in Figure 1, mainly formed by high frequency electric source input block 100, voltage multiplying rectifier unit 200, stabilising arc synchronous control unit 300, stabilising arc pulse output unit 400 4 parts according to ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention.High frequency electric source input block 100 comprises main transformer stabilising arc winding 101, bond pattern gauge tap 102; Voltage multiplying rectifier unit 200 comprises coupling capacitance 201, commutation diode 202, high-voltage filtering capacitor 203; Stabilising arc synchronous control unit 300 comprises pulse front edge testing circuit 301, photoelectric isolating driving circuit 302; Stabilising arc pulse output unit 400 comprises stabilising arc driving power circuit 401, stabilising arc gauge tap pipe 402, stabilising arc current-limiting circuit 403.
As shown in Figure 2, in ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention, the arc maintenance winding of main transformer T1 is that keep-alive circuit is supplied with interchange 175V high frequency square wave power supply by bond pattern control relay J1, relay J 1 is exchanging adhesive conducting under the weldering pattern, discharges under direct current weldering pattern and turn-offs; Capacitor C 1, C2, diode D1, D2 form the voltage multiplying rectifier unit, the interchange 175V power rectifier that main transformer TI stabilising arc winding is supplied with and to boost be negative 350V dc source; Capacitor C 4, resistance R 6 form the negative half-wave of alternating current and open the signal leading edge testing circuit, provide synchronized signal by resistance R 5 for photoelectric coupling integrated circuit U1; Diode D4, resistance R 4 provide driving power for arc maintenance switching tube Q1, and diode D3, capacitor C 3 form the driving power filter circuit of pressure-stabilizing, guarantee that the gate drive signal of arc maintenance switching tube Q1 is the 18V pulse voltage; Resistance R 1, R2 are the driving resistance of arc maintenance switching tube Q1, and Q1 opens the synchronous conducting in signal leading edge with the negative half-wave of alternating current and regularly turn-offs under the control of U1, for welding circuit provides the pulse of negative polarity arc maintenance; Resistance R 3 is high-power resistance, is used for the current limliting of arc maintenance pulse.In the present embodiment, the stabilising arc pulse width is 50～100us, and keep-alive voltage is negative 350V, and back ground current is 5～10A.
As shown in Figure 3, in ac square wave TIG Welding Machine pulse arc stabilizer provided by the invention, the secondary inverting main circuit adopts half-bridge topology, and the former limit winding of main transformer T1 is connected with an inverse switch pipe, is used for high-voltage ac power of input; Secondary windings is connected with bridge rectifier diode and is used for the required low-voltage dc power supply in rectification output secondary inverting loop; The secondary inverting switching tube is connected with the secondary inverting drive circuit, and switching tube is pressed a-c cycle and conducting ratio (also claiming " EP the ratio ") alternate conduction that the user arranges under drive circuit control up and down, for welding circuit provides the ac square wave welding current; The stabilising arc winding of main transformer T1 is connected with the normally opened contact of bond pattern control relay J1, be used to arc static circuit that high-frequency ac power is provided, bond pattern control relay J1 is controlled by user's bond pattern instruction, the J1 adhesive is connected under the ac square wave bond pattern, discharges under the direct current bond pattern and turn-offs; Pulse front edge Detection capacitance C4 is connected with the secondary inverting drive circuit, before the driving signal is directly taken from the grid driving resistance of pipe under the secondary inverting switching tube, no matter whether the secondary inverting switching tube exists the length of opening dead band or Dead Time to change, as long as under the secondary inverting switching tube in a single day pipe receives and opens instruction, be that the negative half-wave of alternating current starts moment, stabilising arc switching tube Q1 is with synchronous conducting 50～100us, to bear 350V DC voltage moment applies and welding circuit, avoid the interchange current interruption, guaranteed the smooth combustion of alternating current arc.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (9)
1. ac square wave TIG Welding Machine pulse arc stabilizer, it is characterized in that, comprise high frequency electric source input block (100), voltage multiplying rectifier unit (200), stabilising arc synchronous control unit (300), and stabilising arc pulse output unit (400), wherein, the input of described high frequency electric source input block (100) is used for connecting an inverse switch pipe output, the input of described voltage multiplying rectifier unit (200) connects the output of described high frequency electric source input block (100), the input of described stabilising arc synchronous control unit (300) is used for connecting secondary inversion Drive and Control Circuit output, the input of described stabilising arc pulse output unit (400) connects the output of described stabilising arc synchronous control unit (300), and described voltage multiplying rectifier unit (200) connects described stabilising arc pulse output unit (400).
2. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1, it is characterized in that, described high frequency electric source input block (100) comprises main transformer stabilising arc winding (101) and the bond pattern gauge tap (102) that connects successively, wherein, described main transformer stabilising arc winding (101) is connected between a described inverse switch pipe output and the bond pattern gauge tap (102), and the output of described bond pattern gauge tap (102) is as the output of described high frequency electric source input block (100).
3. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1, it is characterized in that, described voltage multiplying rectifier unit (200) comprises described coupling capacitance (201), commutation diode (202) and the high-voltage filtering capacitor (203) that connects successively, wherein, described coupling capacitance (201) is connected between the output and described commutation diode (202) of described high frequency electric source input block (100).
4. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1, it is characterized in that, described stabilising arc synchronous control unit (300) comprises pulse front edge testing circuit (301) and the photoelectric isolating driving circuit (302) that connects successively, wherein, described pulse front edge testing circuit (301) is connected between described secondary inverting Drive and Control Circuit output and the described photoelectric isolating driving circuit (302), and the output of described photoelectric isolating driving circuit (302) is as the output of described stabilising arc synchronous control unit (300).
5. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 4, it is characterized in that, described stabilising arc pulse output unit (400) comprises stabilising arc driving power circuit (401), stabilising arc gauge tap pipe (402), the stabilising arc current-limiting circuit (403) that connects successively, wherein, described stabilising arc driving power circuit (401) is connected between the output and described stabilising arc gauge tap pipe (402) of described stabilising arc synchronous control unit (300), and described stabilising arc gauge tap pipe (402) connects described high-voltage filtering capacitor (203).
6. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1, it is characterized in that the high-frequency ac power voltage multiplying rectifier that described voltage multiplying rectifier unit (200) is used for described high frequency electric source input block (100) is provided is the HVDC negative polarity power supply that is multiple times than the welding machine floating voltage.
7. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 6, it is characterized in that, described voltage multiplying rectifier unit (200) be used for the high-frequency ac power voltage multiplying rectifier that described high frequency electric source input block (100) provides be 5 times to the HVDC negative polarity power supply of welding machine floating voltage.
8. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1, it is characterized in that described stabilising arc synchronous control unit (300) is used for bearing the stabilising arc pulse control signal that half-wave is opened signal and formed one fixed width by detecting alternating current.
9. ac square wave TIG Welding Machine pulse arc stabilizer according to claim 1 is characterized in that, described employing stabilising arc pulse output unit (400) is used to welding circuit that voltage, electric current, certain stabilising arc pulse of time are provided.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210479974.3A CN102962548B (en) | 2012-11-22 | 2012-11-22 | Pulse arc-stabilizing device of inverting alternating-current square-wave argon tungsten-arc welding machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210479974.3A CN102962548B (en) | 2012-11-22 | 2012-11-22 | Pulse arc-stabilizing device of inverting alternating-current square-wave argon tungsten-arc welding machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537728A (en) * | 2016-01-27 | 2016-05-04 | 上海广为焊接设备有限公司 | Circuit for increasing small current arc striking successful rate and stability of inverter argon arc welding machine |
| CN105880798A (en) * | 2014-12-03 | 2016-08-24 | 盐城鼎力达焊接科技有限公司 | Pilot arc circuit of inverter alternating current-direct current square wave argon arc welding machine |
| CN107442896A (en) * | 2016-05-30 | 2017-12-08 | 上海沪工焊接集团股份有限公司 | Plasma cutting inverter control circuit |
| CN109396608A (en) * | 2017-08-15 | 2019-03-01 | 浙江颐顿机电有限公司 | A kind of digitlization AC/DC pulse TIG Welding Machine system |
| CN111521948A (en) * | 2020-06-15 | 2020-08-11 | 温州大学激光与光电智能制造研究院 | Arc-breaking fault detection circuit and detection method based on filter inductor voltage |
| CN116068699A (en) * | 2023-03-07 | 2023-05-05 | 南京迪威普光电技术股份有限公司 | Annular high-voltage arc generator with controllable strength and generation method |
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| CN111521948A (en) * | 2020-06-15 | 2020-08-11 | 温州大学激光与光电智能制造研究院 | Arc-breaking fault detection circuit and detection method based on filter inductor voltage |
| CN111521948B (en) * | 2020-06-15 | 2022-07-26 | 温州大学激光与光电智能制造研究院 | Detection method of arc-breaking fault detection circuit based on filter inductance voltage |
| CN116068699A (en) * | 2023-03-07 | 2023-05-05 | 南京迪威普光电技术股份有限公司 | Annular high-voltage arc generator with controllable strength and generation method |
| CN116068699B (en) * | 2023-03-07 | 2023-08-29 | 南京迪威普光电技术股份有限公司 | Annular high-voltage arc generator with controllable strength and generation method |
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