CN202129536U - Argon-arc-welding arc ignition circuit - Google Patents
Argon-arc-welding arc ignition circuit Download PDFInfo
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- CN202129536U CN202129536U CN201120151747U CN201120151747U CN202129536U CN 202129536 U CN202129536 U CN 202129536U CN 201120151747 U CN201120151747 U CN 201120151747U CN 201120151747 U CN201120151747 U CN 201120151747U CN 202129536 U CN202129536 U CN 202129536U
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Abstract
The utility model relates to an arc ignition circuit, in particular to an argon-arc-welding arc ignition circuit, comprising a high-frequency step-up transformer T1 and a high-frequency coupler T2. A primary winding of the high-frequency step-up transformer T1 is electrically connected with the power-frequency alternating current via a relay loop. A rectification filter circuit and a high-voltage discharge circuit are connected between the secondary winding of the high-frequency step-up transformer T1 and the primary winding of the high-frequency coupler T2. The high-voltage discharge circuit comprises a controllable silicon V2, a controllable silicon trigger circuit and a controllable silicon protection circuit. The secondary winding of the high-frequency coupler T2 is connected with a welding loop. According to the utility model, the on/off state of the controllable silicon is controlled by the controllable silicon trigger circuit, instead of a primary current pathway of the high-frequency coupler T2 originally provided by a spark plug, thereby solving the problems that the arc ignition effect by the spark plug mode is poor in consistency, main circuits are easily interfered, arc ignition is not easy to perform due to accumulated dust, etc.
Description
Technical field
The utility model relates to a kind of arc ignition circuit, relates in particular to a kind of argon arc welding arc ignition circuit.
Background technology
The argon arc welding technology is on the basis of the principle of common electrical arc-welding; Utilize the protection of argon gas, make wlding be melted into the liquid bath that forms on the base material by weldering, make a kind of solder technology that is reached metallurgical binding by weldering metal and wlding through high electric current to the metal wlding; Owing in the high-temperature fusion welding, constantly serve argon gas; Wlding can not be contacted with airborne oxygen, thereby prevented the oxidation of wlding, therefore can soldering copper, non-ferrous metals such as aluminium, steel alloy.
TIG weldering power supply has welding process to stablize, receive arc control and is easy to advantage as non-ferrous metal and stainless main welding equipment.And one of bottleneck that perplexs the development of TIG weldering power supply for a long time is exactly the striking problem.Can the quality of striking performance directly have influence on welding process and carry out smoothly.
TIG weldering striking mode generally is divided into contact starting and contactless striking two big classes.The contact starting mode that traditional hand is made an arc causes the phenomenons such as scaling loss, surface of the work scratch and weld seam tungsten inclusion of tungsten electrode easily, generally should not adopt.
Extensive use is non-contact starting mode in the TIG weldering at present, and contactless striking comprises high-voltage pulse thread-leading arc and high-frequency and high-voltage striking.The air gap that high-voltage pulse thread-leading arc can puncture is less, the striking weak effect.
Hf arc starter mainly contains dual mode:
1) the traditional power frequency high frequency oscillator shown in accompanying drawing 1; It is a high-frequency and high-voltage generator; Behind its access electric power network; Can make the power frequency electricity be transformed into the high-frequency and high-voltage alternating current,, be serially connected in the welding circuit and ignite and weld or arc cutting so as to the gap between puncture tungsten electrode and the workpiece through the spark plug discharge.
2) the high-frequency resonant striking device shown in accompanying drawing 2; By the controlled multi resonant oscillator that shakes certain dutycycle and frequency is provided, the driving power device is through the high high frequency transformer secondary side output high pressure of step-up ratio; Discharge releases energy through spark plug, realizes high-frequency arc strike.
The shortcoming of high frequency oscillator striking is that Electro Magnetic Compatibility is poor, easily the Interference Control system.The spark plug gap size directly influences the striking effect, and the striking same effect is poor.Puncture other electrical equipment in the source of welding current and the welding circuit easily, disturb the operate as normal of radio reception or other electronic instrument, harmful health.Influenced by ambient humidity,, will have a strong impact on the striking effect if dust is deposited on the spark plug, even can not striking.
A kind of Electro Magnetic Compatibility is good, safety, and the striking mode that reliability is high is imperative.
Summary of the invention
Argon arc welding arc ignition circuit to prior art punctures other electrical equipment in the source of welding current and the welding circuit easily; The striking effect is defective affected by environment easily; The utility model provides a kind of other electrical equipment that can not puncture in the source of welding current and the welding circuit, and striking uniformity and stability is the argon arc welding arc ignition circuit preferably.
For solving the problems of the technologies described above, the utility model is taked following technical scheme:
A kind of argon arc welding arc ignition circuit; Comprise high-frequency step-up transformer T1, high-frequency coupler T2; Described high-frequency step-up transformer T1 elementary (T1-1 end with T1-2 holds between) is electrically connected with industrial frequency AC through relay circuit; Be connected with current rectifying and wave filtering circuit and electrion loop between secondary (between T1-3 end and the T1-4 end) of described high-frequency step-up transformer T1 and elementary (between T2-1 end and the T2-2 end) of high-frequency coupler T2; Described electrion loop comprises controllable silicon V2, thyristor gating circuit, the silicon controlled rectifier protecting circuit, and the secondary and welding circuit of described high-frequency coupler T2 is connected.Relay circuit breaks off and conducting according to enable signal; The elementary power supply that provides for high-frequency step-up transformer T1; Replace original spark plug that the primary current path of high-frequency coupler T2 is provided by thyristor gating circuit control silicon controlled break-make; Make the primary voltage of high-frequency coupler T2 more stable, strengthened the uniformity and the stability of the starting the arc, greatly reduce interference main circuit.Simultaneously, also avoided the striking same effect of spark plug mode poor, dust is piled up problems such as causing being difficult for the starting the arc.
As preferably; Described thyristor gating circuit comprises second resistance R 2 that is connected in series, the first bilateral diode V1, the 3rd resistance R 3, piezo-resistance Rs; The negative pole of described controllable silicon V2 and trigger electrode are connected the two ends of second resistance R 2, and the positive pole of controllable silicon V2 is connected with the other end of piezo-resistance Rs.When voltage reached the breakdown voltage of piezo-resistance Rs, piezo-resistance Rs punctured, controllable silicon V2 conducting, and high-frequency coupler T2 obtains stable primary voltage, and T2 boosts through high-frequency coupler, and electric arc can ignite.
As preferably; Described silicon controlled rectifier protecting circuit comprises the 4th capacitor C 4 that is connected in series, the 4th resistance R 4, first inductance L 1; The other end of the 4th capacitor C 4 is connected with the negative pole of controllable silicon V2, and the other end of first inductance L 1 is connected between the 3rd resistance R 3 and the piezo-resistance Rs.The silicon controlled rectifier protecting circuit can absorb controllable silicon V2 spike, protection controllable silicon V2.As preferably; Described current rectifying and wave filtering circuit comprises the full-wave rectification bridge of being made up of the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4; The output of described full-wave rectification bridge is connected with the positive and negative electrode of controllable silicon V2 respectively, and described the 3rd capacitor C 3 is connected between the T1-1 end and T1-4 end of high-frequency step-up transformer T1.Current rectifying and wave filtering circuit provides required voltage and electric current for the electrion loop.
As preferably; Described relay circuit comprises triode V3, the 5th resistance R 5, the 5th diode D5, relay K 1, relay power CN1; The 5th resistance R 5 is connected between the base stage and emitter stage of triode V3; The base stage of triode V3 is connected with earth terminal, and the emitter stage of triode V3 is connected with the enable signal end, and the positive pole of the 5th diode D5 is connected with the colelctor electrode of triode V3; The negative pole of the 5th diode D5 is connected with relay power CN1, and relay K 1 is connected between the colelctor electrode of VCC end and triode V3 of relay power CN1.Enable signal ends with saturated through triode V3's, and control relay K1 cut-offs, and T1 provides power supply for high-frequency step-up transformer.
The described a kind of argon arc welding arc ignition circuit of the utility model; Replace original spark plug that the primary current path of high-frequency coupler T2 is provided by thyristor gating circuit control silicon controlled break-make; Make the primary voltage of high-frequency coupler T2 more stable; Strengthened the uniformity and the stability of the starting the arc, greatly reduced interference main circuit.Simultaneously, also avoided the striking same effect of spark plug mode poor, dust is piled up problems such as causing being difficult for the starting the arc.
Description of drawings
Fig. 1 is the structural representation of the said a kind of argon arc welding arc ignition circuit embodiment of the utility model.
Fig. 2 is the physical circuit figure of Fig. 1.
Specific embodiment
The utility model is described in further detail with the specific embodiment below in conjunction with accompanying drawing 1, accompanying drawing 2:
A kind of argon arc welding arc ignition circuit; As shown in Figure 1; Comprise high-frequency step-up transformer T1, high-frequency coupler T2; Be connected with current rectifying and wave filtering circuit and electrion loop between the secondary and high-frequency coupler T2 of high-frequency step-up transformer T1 elementary, described electrion loop comprises controllable silicon V2, thyristor gating circuit, the silicon controlled rectifier protecting circuit.The elementary of described high-frequency step-up transformer T1 is electrically connected with industrial frequency AC through relay circuit, and the secondary and welding circuit of described high-frequency coupler T2 is connected.
Shown in accompanying drawing 2; Described thyristor gating circuit comprises second resistance R 2 that is connected in series, the first bilateral diode V1, the 3rd resistance R 3, piezo-resistance Rs; The negative pole of described controllable silicon V2 and trigger electrode are connected the two ends of second resistance R 2, and the positive pole of controllable silicon V2 is connected with the other end of piezo-resistance Rs.
Described silicon controlled rectifier protecting circuit comprises the 4th capacitor C 4 that is connected in series, the 4th resistance R 4, first inductance L 1; The other end of the 4th capacitor C 4 is connected with the negative pole of controllable silicon V2, and the other end of first inductance L 1 is connected between the 3rd resistance R 3 and the piezo-resistance Rs.Described current rectifying and wave filtering circuit comprises the full-wave rectification bridge of being made up of the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4; The output of described full-wave rectification bridge is connected with the positive and negative electrode of controllable silicon V2 respectively, and described the 3rd capacitor C 3 is connected between the T1-1 end and T1-4 end of high-frequency step-up transformer T1.
Described relay circuit comprises triode V3, the 5th resistance R 5, the 5th diode D5, relay K 1, relay power CN1; The 5th resistance R 5 is connected between the base stage and emitter stage of triode V3; The base stage of triode V3 is connected with earth terminal; The emitter stage of triode V3 is connected with the enable signal end; The colelctor electrode of triode V3 is connected with the positive pole of the 5th diode D5, and the negative pole of the 5th diode D5 is connected with relay power CN1, and relay K 1 is connected between the colelctor electrode of VCC end and triode V3 of relay power CN1.Triode V3 is as switching tube, and the control relay coil gets dead electricity.During the enable signal high level of CN1-2 pin, triode V3 is saturated, relay K 1; Otherwise, during the enable signal low level of CN1-2 pin, the triode V3 state that do not reach capacity, relay K 1 must not.The 5th resistance R 5 prevents triode V3 misoperation as the base stage protective resistance of triode V3.Relay K 1 gets electric, and normally opened contact is closed, and high-frequency step-up transformer T1 obtains industrial-frequency alternating current, if normally opened contact breaks off then be opposite.The 5th diode D5 plays the afterflow effect when relay turn-offs, protective relay K1.
First capacitor C 1 is a filter capacitor, and connector CN1:1 pin is VCC, and 2 pin enable signals are used for driving triode V3, and 3 pin GND, VCC and GND are relay K 1 power supply.Connector CN2: industrial-frequency alternating current is high-frequency step-up transformer T1 power supply, connector CN3: high-tension electricity is connected to the high-frequency coupler T2 in the welding circuit.
When the enable signal of CN1-2 pin was high level, triode V3 was saturated, the conducting of triode V3 collector and emitter; Relay K 1 coil gets; Normally opened contact is closed, power frequency electric boost transformer T1 primary side T1-1, and T1-2 obtains industrial-frequency alternating current; Industrial-frequency alternating current boosts through step-up transformer T1, and gives the 3rd capacitor C 3 chargings;
When the T1-4 pin was high level with respect to the T1-3 pin, electric current was through step-up transformer T1-4 pin, through the first diode D1, when voltage reaches the breakdown voltage of piezo-resistance RS; Piezo-resistance RS punctures, and makes controllable silicon V2 conducting, through the 3rd diode D3; High-frequency coupler T2 primary side T2-2, T2-1 gets back to high-frequency step-up transformer T1 secondary side T1-3 pin; High-frequency coupler T2 obtains stable high-tension electricity, and this voltage boosts through high-frequency coupler T2, and electric arc can ignite.
When the T1-3 pin was high level with respect to the T1-4 pin, electric current was through step-up transformer secondary side T1-3, transformer primary side T1-1; T1-2 is through the 4th diode D4, when voltage reaches the breakdown voltage of piezo-resistance Rs; Piezo-resistance Rs punctures; Controllable silicon V2 conducting through the second diode D2, is got back to the high frequency transformation T1 secondary side T1-4 that boosts.Like this, high-frequency coupler T2 obtains stable high-tension electricity, and this voltage boosts through high-frequency coupler T2, and electric arc can ignite.
When the enable signal of CN1-2 is low level, the triode V3 state that do not reach capacity, be failure to actuate in relay K 1 contact, and arc ignition circuit is not worked.
Claims (5)
1. argon arc welding arc ignition circuit; Comprise high-frequency step-up transformer T1, high-frequency coupler T2; It is characterized in that: the elementary of described high-frequency step-up transformer T1 is electrically connected with industrial frequency AC through relay circuit; Be connected with current rectifying and wave filtering circuit and electrion loop between the secondary and high-frequency coupler T2 of described high-frequency step-up transformer T1 elementary; Described electrion loop comprises controllable silicon V2, thyristor gating circuit, the silicon controlled rectifier protecting circuit, and the secondary and welding circuit of described high-frequency coupler T2 is connected.
2. a kind of argon arc welding arc ignition circuit as claimed in claim 1; It is characterized in that: described thyristor gating circuit comprises second resistance R 2 that is connected in series, the first bilateral diode V1, the 3rd resistance R 3, piezo-resistance Rs; The negative pole of described controllable silicon V2 and trigger electrode are connected the two ends of second resistance R 2, and the positive pole of controllable silicon V2 is connected with the other end of piezo-resistance Rs.
3. a kind of argon arc welding arc ignition circuit as claimed in claim 2; It is characterized in that: described silicon controlled rectifier protecting circuit comprises the 4th capacitor C 4 that is connected in series, the 4th resistance R 4, first inductance L 1; The other end of the 4th capacitor C 4 is connected with the negative pole of controllable silicon V2, and the other end of first inductance L 1 is connected between the 3rd resistance R 3 and the piezo-resistance Rs.
4. a kind of argon arc welding arc ignition circuit as claimed in claim 3; It is characterized in that: described current rectifying and wave filtering circuit comprises the full-wave rectification bridge of being made up of the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4; The output of described full-wave rectification bridge is connected with the positive and negative electrode of controllable silicon V2 respectively, and described the 3rd capacitor C 3 is connected between the T1-1 end and T1-4 end of high-frequency step-up transformer T1.
5. a kind of argon arc welding arc ignition circuit as claimed in claim 4; It is characterized in that: described relay circuit comprises triode V3, the 5th resistance R 5, the 5th diode D5, relay K 1, relay power CN1; The 5th resistance R 5 is connected between the base stage and emitter stage of triode V3; The base stage of triode V3 is connected with earth terminal, and the emitter stage of triode V3 is connected with the enable signal end, and the colelctor electrode of triode V3 is connected with the positive pole of the 5th diode D5; The negative pole of the 5th diode D5 is connected with relay power CN1, and relay K 1 is connected between the colelctor electrode of VCC end and triode V3 of relay power CN1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120151747U CN202129536U (en) | 2011-05-13 | 2011-05-13 | Argon-arc-welding arc ignition circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120151747U CN202129536U (en) | 2011-05-13 | 2011-05-13 | Argon-arc-welding arc ignition circuit |
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| Publication Number | Publication Date |
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| CN202129536U true CN202129536U (en) | 2012-02-01 |
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| CN201120151747U Expired - Fee Related CN202129536U (en) | 2011-05-13 | 2011-05-13 | Argon-arc-welding arc ignition circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104801812A (en) * | 2015-05-04 | 2015-07-29 | 辽宁工程技术大学 | Arc striking device and arc striking method for vacuum brazing |
| CN103737153B (en) * | 2014-01-08 | 2015-10-28 | 无锡汉神电气有限公司 | High-frequency arc ignition circuit |
| CN108340048A (en) * | 2017-12-29 | 2018-07-31 | 上海广为焊接设备有限公司 | Contactless arc ignition circuit for argon arc welding machine |
| CN114789286A (en) * | 2021-01-25 | 2022-07-26 | 上海奥燃焊接设备有限公司 | Low-frequency high-voltage arc striking circuit without discharger |
-
2011
- 2011-05-13 CN CN201120151747U patent/CN202129536U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103737153B (en) * | 2014-01-08 | 2015-10-28 | 无锡汉神电气有限公司 | High-frequency arc ignition circuit |
| CN104801812A (en) * | 2015-05-04 | 2015-07-29 | 辽宁工程技术大学 | Arc striking device and arc striking method for vacuum brazing |
| CN104801812B (en) * | 2015-05-04 | 2016-09-14 | 辽宁工程技术大学 | A kind of arc initiation device for vacuum brazing and striking method |
| CN108340048A (en) * | 2017-12-29 | 2018-07-31 | 上海广为焊接设备有限公司 | Contactless arc ignition circuit for argon arc welding machine |
| CN108340048B (en) * | 2017-12-29 | 2019-09-27 | 上海广为焊接设备有限公司 | Contactless arc ignition circuit for argon arc welding machine |
| CN114789286A (en) * | 2021-01-25 | 2022-07-26 | 上海奥燃焊接设备有限公司 | Low-frequency high-voltage arc striking circuit without discharger |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20180513 |
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| CF01 | Termination of patent right due to non-payment of annual fee |