CN108015387A - A kind of non-contact arc ignition circuit and argon arc welding machine - Google Patents
A kind of non-contact arc ignition circuit and argon arc welding machine Download PDFInfo
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- CN108015387A CN108015387A CN201711483741.XA CN201711483741A CN108015387A CN 108015387 A CN108015387 A CN 108015387A CN 201711483741 A CN201711483741 A CN 201711483741A CN 108015387 A CN108015387 A CN 108015387A
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- 238000003466 welding Methods 0.000 title claims abstract description 51
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910052786 argon Inorganic materials 0.000 title claims abstract description 19
- 238000010891 electric arc Methods 0.000 claims abstract description 26
- 230000005611 electricity Effects 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000000977 initiatory effect Effects 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 12
- 238000007667 floating Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
- B23K9/0672—Starting the arc without direct contact between electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention discloses a kind of non-contact arc ignition circuit and argon arc welding machine.The non-contact arc ignition circuit includes：The first striking input terminal with non-contact arc ignition circuit, the high voltage input terminal of high-voltage arc ignition circuit and the supercharging input terminal of boost pressure circuit are electrically connected power supply respectively；First high-voltage pulse output terminal of high-voltage arc ignition circuit is electrically connected with a power output end, for producing electric arc according to the first alternating voltage, and is applied to the first striking input terminal and the second striking input terminal；The supercharging output terminal of boost pressure circuit is electrically connected with the first striking input terminal and the first high-voltage pulse output terminal respectively, for generating the second DC voltage according to the first alternating voltage, and apply to drawing the first arc input terminal and the first high-voltage pulse output terminal, pilot arc, the value of second DC voltage is more than the value of the first DC voltage, solve the problems, such as that non-contact arc ignition circuit poor reliability and arcing initiation success rate are relatively low, improve non-contact arc ignition circuit arcing initiation success rate and reliability.
Description
Technical field
The present embodiments relate to source of welding current technical field, more particularly to a kind of non-contact arc ignition circuit and argon arc welding
Machine.
Background technology
Welding procedure plays the role of very important in modern industrial civilization, and metal art has been catered in the appearance of welding
Develop the needs to new process means.Wherein, a kind of method of the argon arc welding as welding, due to narrow with welding heat affected zone,
Weldment stress, deformation and crackle tendency are small, and operation and observation are convenient, and have been obtained the advantages that solderable refractory metal extensively
Using.
The common striking mode of argon arc welding machine has two kinds, i.e. contacting ignition arc and non-contact striking.Contacting ignition arc passes through welding gun
On tungsten needle contact workpiece after lift and can produce electric arc.Non-contact striking is by high pressure or high-voltage pulse gas breakdown, in tungsten needle
Electric arc is produced between workpiece, is contacted without the tungsten needle on welding gun with workpiece.But the argon arc welding machine of existing non-contact striking is deposited
The poor reliability and relatively low arcing initiation success rate the shortcomings that, also always crucial controlling difficulties of industry.
The content of the invention
The present invention provides a kind of non-contact arc ignition circuit and argon arc welding machine, to improve non-contact arc ignition circuit arcing initiation success rate
And reliability.
In a first aspect, an embodiment of the present invention provides a kind of non-contact arc ignition circuit, including：
Power supply, including multiple power output ends, respectively the first striking input terminal with the non-contact arc ignition circuit,
The high voltage input terminal of high-voltage arc ignition circuit and the supercharging input terminal of boost pressure circuit are electrically connected, for being exported to the striking input terminal
First DC voltage, and input the first alternating voltage to the high voltage input terminal and the supercharging input terminal；
High-voltage arc ignition circuit, including the first high-voltage pulse output terminal and the second high-voltage pulse output terminal, first high pressure
Pulse output end is electrically connected with a power output end, for producing high-voltage pulse according to first alternating voltage, and
Apply to the first striking input terminal and the second striking input terminal, to produce electric arc；
Boost pressure circuit, including the first supercharging output terminal and the second supercharging output terminal, the first supercharging of the boost pressure circuit are defeated
Outlet is electrically connected with the first striking input terminal, and the second supercharging output terminal is electrically connected with the first high-voltage pulse output terminal
Connect, for generating the second DC voltage according to first alternating voltage, and apply to the first striking input terminal and described
First high-voltage pulse output terminal, maintains the electric arc, and the value of second DC voltage is more than the value of first DC voltage.
Alternatively, the value of second DC voltage is between 1.5 to 2.5 times of the value of first DC voltage.
Alternatively, power supply includes the first power output end, second source output terminal and the 3rd power output end, described
First power output end and the second source output terminal are exported with the first striking input terminal and second supercharging respectively
End is electrically connected；
The boost pressure circuit includes：
First capacitance, the first end of first capacitance are electrically connected with the 3rd power output end；
Second capacitance, the anode of second capacitance are electrically connected with the second source output terminal, second capacitance
Cathode is electrically connected with first power output end；
First diode, the cathode of first diode are electrically connected with the second end of first capacitance, and described first
The anode of diode is electrically connected with the second source output terminal；
Second diode, the anode of second diode are electrically connected with the cathode of first diode, and described second
The cathode of diode is electrically connected with the cathode of second capacitance.
Alternatively, the boost pressure circuit further includes：Supercharging protection sub-circuit；The cathode of second capacitance passes through the increasing
Pressure protection sub-circuit is electrically connected with first power output end；
The supercharging protection sub-circuit includes：3rd diode, first resistor and second resistance；3rd diode
Anode is electrically connected with the cathode of second capacitance, and the cathode and the first end of the second resistance of the 3rd diode are electrically connected
Connect, the second end of the second resistance is electrically connected with first power output end, the first end of the first resistor with it is described
The anode of 3rd diode is electrically connected, and the second end of the first resistor is electrically connected with the second end of the second resistance.
Alternatively, the high-voltage arc ignition circuit includes：
Line output transformer, including first voltage input terminal, second voltage input terminal, first voltage output terminal and the second electricity
Output terminal is pressed, the first voltage input terminal is electrically connected with the 3rd power output end, the second voltage input terminal and institute
State the electrical connection of second source output terminal；
4th diode, the anode of the 4th diode are electrically connected with the first voltage output terminal；
Discharger, the discharger be electrically connected to the 4th diode cathode and the second voltage output terminal it
Between；
3rd capacitance, the first end of the 3rd capacitance are electrically connected with the cathode of the 4th diode；
High-frequency coupler, including the first couple input, the second couple input, the first coupled output and the second coupling
Output terminal, second couple input are electrically connected with the second voltage output terminal, first couple input with it is described
The second end of 3rd capacitance is electrically connected, and first coupled output is electrically connected with first power output end, and described second
Coupled output is electrically connected with the second source output terminal.
Alternatively, the power supply includes：Main transformer, the secondary of the main transformer include centre cap, first
Tap and the second tap；
The virtual value of the alternating voltage exported between first tap and second tap be first tap and
Twice of the virtual value of the alternating voltage exported between the centre cap.
Alternatively, first tap is as the 3rd power output end, and second tap is as the described second electricity
Source output terminal；
The non-contact arc ignition circuit further includes：
Full-wave rectifying circuit, including the 5th diode and the 6th diode；
The anode of 5th diode is electrically connected with first tap；
The anode of 6th diode is electrically connected with second tap, the cathode of the 6th diode and described the
The cathode of five diodes is electrically connected, and is used as first power output end.
Alternatively, the non-contact arc ignition circuit further includes：
Output protection circuit, including varistor, the 4th capacitance and the 5th capacitance；The first end of the varistor and institute
Cathode of the first end of the 4th capacitance respectively with the 6th diode is stated to be electrically connected；The second end of 4th capacitance with it is described
The first end ground connection of 5th capacitance, the second end of the second end of the varistor and the 5th capacitance respectively with the center
Tap is electrically connected.
Second aspect, the embodiment of the present invention additionally provide a kind of argon arc welding machine, including welding gun, welding ground folder and fuselage；
The fuselage includes the non-contact arc ignition circuit that any embodiment of the present invention provides；
Wherein, the input terminal of the welding gun is electrically connected with the second striking input terminal, the input of the welding ground folder
End is electrically connected with the first striking input terminal, for the welding gun output terminal and the welding ground press from both sides output terminal it
Between produce electric arc.
The present invention exports the first alternating current by setting boost pressure circuit, by the supercharging input terminal of boost pressure circuit and power supply
The power output end of pressure is electrically connected, and the first supercharging output terminal of boost pressure circuit is electrically connected with the first striking input terminal, the second supercharging
Output terminal is electrically connected with the first high-voltage pulse output terminal, the second DC voltage for making boost pressure circuit be generated according to the first alternating voltage
Apply to the first striking input terminal and the first high-voltage pulse output terminal, and the value of the second DC voltage is more than the first DC voltage
Value so that the voltage of striking input terminal is multiplied, and increases floating voltage, and then improve high-voltage arc ignition circuit striking into
Power；Meanwhile boost pressure circuit provides continual and steady voltage, caused electricity after high-voltage arc ignition circuit striking success can be maintained
Arc, improves the reliability of welding.Therefore, there are poor reliability and striking for the argon arc welding machine of the invention for solving non-contact striking
The problem of success rate is relatively low, improves non-contact arc ignition circuit arcing initiation success rate and reliability.
Brief description of the drawings
Fig. 1 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention one provides；
Fig. 2 is a kind of structure diagram of non-contact arc ignition circuit provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention three provides；
Fig. 4 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention four provides；
Fig. 5 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention five provides；
Fig. 6 is a kind of structure diagram for argon arc welding machine that the embodiment of the present invention six provides.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
It illustrate only part related to the present invention rather than entire infrastructure in description, attached drawing.
Embodiment one
Fig. 1 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention one provides.Referring to Fig. 1, this is non-
Contacting ignition arc circuit specifically includes：Power supply 10, high-voltage arc ignition circuit 20 and boost pressure circuit 30.
Power supply 10 includes multiple power output ends 100, respectively with the first striking input terminal of non-contact arc ignition circuit
401st, the high voltage input terminal 201 of high-voltage arc ignition circuit 20 and the supercharging input terminal 301 of boost pressure circuit 30 are electrically connected.This is non-contact to draw
Arc circuit is used to export the first DC voltage to the first striking input terminal 401, and to high voltage input terminal 201 and is pressurized input terminal
301 the first alternating voltages of input.
High-voltage arc ignition circuit 20 includes the first high-voltage pulse output terminal 202 and the second high-voltage pulse output terminal 203, and high pressure is drawn
First high-voltage pulse output terminal 202 of arc circuit 20 is electrically connected with a power output end 100, for according to the first alternating voltage
High-voltage pulse is produced, and is applied to the first striking input terminal 401 and the second striking input terminal 402, to produce electric arc.
Boost pressure circuit 30 includes the first supercharging output terminal 302 and second and is pressurized output terminal 303, and the first of boost pressure circuit 30 increases
Pressure output terminal 302 is electrically connected with the first striking input terminal 401, the second supercharging 303 and first high-voltage pulse output terminal 202 of output terminal
It is electrically connected, for generating the second DC voltage according to the first alternating voltage, and applies high to the first arc input terminal 401 and first is drawn
Pulse output end 202, pilot arc are pressed, the value of the second DC voltage is more than the value of the first DC voltage.
According to Fig. 1, first can not only be exported between the first striking input terminal 401 and the second supercharging output terminal 303
DC voltage, additionally it is possible to export the second DC voltage.First supercharging 302 and first striking input terminal 401 of output terminal passes through power supply
Power supply 10 is electrically connected so that the first supercharging output terminal 302 and second is pressurized the high-voltage pulse that output terminal 303 produces and applies to first
Between 401 and second striking input terminal 402 of striking input terminal.The course of work of the non-contact arc ignition circuit is：Produced in electric arc
Incipient stage, the second direct current for exporting between the second supercharging 303 and first striking input terminal 401 of output terminal of boost pressure circuit 30
Voltage (i.e. floating voltage) is higher, improves arcing initiation success rate, the first high-voltage pulse output terminal 202 of high-voltage arc ignition circuit 20 and the
Two high-voltage pulse output terminals 203 export the striking high pressure of 2kV~10kV, which is applied to the first striking input terminal 401
On the welding gun and workpiece connected respectively with the second striking input terminal 402, the air between welding gun and workpiece can be punctured and produce electricity
Arc, striking success；In the first stage that electric arc maintains, the first supercharging supercharging output of output terminal 302 and second of boost pressure circuit 30
Second DC voltage pilot arc of the output of end 303 does not disappear；In the second stage that electric arc maintains, i.e. boost pressure circuit 30 continues defeated
Go out the second DC voltage of a period of time, after arc stability, high-voltage arc ignition circuit 20 and boost pressure circuit 30 can be disconnected, due to high pressure
The the first high-voltage pulse output terminal 202 and the second high-voltage pulse output terminal 203 of arc ignition circuit 20 are electrically connected, and power supply 10 exports
The first DC voltage apply to the first striking input terminal 401 and the second striking input terminal 402, do not disappeared with pilot arc.
Research shows that, in the incipient stage that electric arc produces, floating voltage is higher, and arcing initiation success rate is higher, and is tieed up in electric arc
Hold the stage, required voltage is relatively low.In existing technology, generally using low no-load voltage, it is low to cause arcing initiation success rate
Problem.The present invention sets the first supercharging output terminal 302 of boost pressure circuit 20 to be electrically connected with the first striking input terminal 401, Yi Ji
Two supercharging output terminals 303 are electrically connected with the first high-voltage pulse output terminal 202, for generating the second direct current according to the first alternating voltage
Voltage, and apply big to the first striking input terminal 401 and the second striking input terminal 402, pilot arc, the value of the second DC voltage
In the value of the first DC voltage.Technical solution provided in this embodiment is substantially that supercharging is added in non-contact arc ignition circuit
Circuit 20, improves the floating voltage of the incipient stage non-contact arc ignition circuit produced in electric arc, improves arcing initiation success rate；
The maintenance stage of electric arc, still using the first relatively low DC voltage of voltage, reduces the loss of non-contact arc ignition circuit.Cause
This, the present invention solves the problems, such as the argon arc welding machine of non-contact striking there are poor reliability and arcing initiation success rate are relatively low, improves
Non-contact arc ignition circuit arcing initiation success rate and reliability.
Alternatively, the value of the second DC voltage can be between 1.5 to 2.5 times of the value of the first DC voltage.On the one hand,
There is the requirement of higher to the precision and reliability of component due to producing excessive floating voltage, first device in circuit can be increased
The cost of part.On the other hand, in order to which the floating voltage for producing the first striking input terminal 401 and the second striking input terminal 402 is applied
It is added on workpiece, floating voltage is often exposed to outside argon arc welding machine, if non-contact arc ignition circuit generates excessive zero load electricity
Pressure, can cause serious threat to the personal safety of user.The value for setting the second DC voltage is the value of the first DC voltage
1.5 to 2.5 times between, arcing initiation success rate can be improved and reduce security risk.
Alternatively, the value of the second DC voltage can be 2 times of the value of the first DC voltage.
Alternatively, the first DC voltage can between 40V~113V, the second DC voltage can between 80V~
Between 226V.
Embodiment two
Fig. 2 is a kind of structure diagram of non-contact arc ignition circuit provided by Embodiment 2 of the present invention.Referring to Fig. 2, this is non-
Contacting ignition arc circuit includes：Power supply 10, high-voltage arc ignition circuit 20 and boost pressure circuit 30.
Further, on the basis of above-described embodiment, the power output end of power supply 10 can include the first power supply
Output terminal 102,104 and the 3rd power output end 106 of second source output terminal, the first power output end 102 and second source are defeated
Outlet 104 is electrically connected with the first striking input terminal 401 and the second supercharging output terminal respectively.
At this time, boost pressure circuit 30 can specifically include：
First capacitance C14, the first end of the first capacitance C14 are electrically connected with the 3rd power output end 106；
Second capacitance C2, the anode of the second capacitance C2 are electrically connected with second source output terminal 104, the cathode of the second capacitance C2
It is electrically connected with the first power output end 102；
First diode D1, the cathode of the first diode D1 are electrically connected with the second end of the first capacitance C14, the first diode
The anode of D1 is electrically connected with second source output terminal 104；
Second diode D2, the anode of the second diode D2 are electrically connected with the cathode of the first diode D1, the second diode
The cathode of D2 is electrically connected with the cathode of the second capacitance C2.
The boost pressure circuit 30 is voltage doubling rectifing circuit, when the first alternating voltage is positive half cycle, second source output terminal 104
Current potential be higher than the 3rd power output end 106 current potential.Through the first diode D1 the first alternating current is charged to the first capacitance C14
The peak value of pressure.When the first alternating voltage is negative half period, the current potential of the 3rd power output end 106 is higher than second source output terminal
104 current potential.First capacitance C14 and the first alternating voltage charge after being added through the second diode D2 to the second capacitance C2, make the
The voltage at two capacitance C2 both ends is twice or so of the peak value of the first alternating voltage.The present embodiment solves the argon of non-contact striking
There are the problem of poor reliability and relatively low arcing initiation success rate, improve non-contact arc ignition circuit arcing initiation success rate and reliable for arc-welding machine
Property.
With continued reference to Fig. 2, boost pressure circuit 30 can also include：Supercharging protection sub-circuit 31；The cathode of second capacitance C2 leads to
Supercharging protection sub-circuit 31 is crossed to be electrically connected with the first power output end 102.
Supercharging protection sub-circuit 31 can include：3rd diode D3, first resistor R1 and second resistance R2.Three or two pole
The anode of pipe D3 is electrically connected with the cathode of the second capacitance C2, and the first end of the cathode and second resistance R2 of the 3rd diode D3 is electrically connected
Connect, the second end of second resistance R2 is electrically connected with the first power output end 102, and the 3rd diode D3 and second resistance R2 are so set
Put the effect for playing the electric discharge for accelerating boost pressure circuit 30.The first end of first resistor R1 and the anode of the 3rd diode D3 are electrically connected
Connect, the second end of first resistor R1 is electrically connected with the second end of second resistance R2.First resistor R1 so sets and plays current limliting
Effect.
Embodiment three
Fig. 3 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention three provides.Referring to Fig. 3, this is non-
Contacting ignition arc circuit includes：Power supply 10, high-voltage arc ignition circuit 20 and boost pressure circuit 30.
Further, on the basis of the various embodiments described above, high-voltage arc ignition circuit 20 can specifically include：
Line output transformer T2, including first voltage input terminal 6, second voltage input terminal 7,8 and of first voltage output terminal
Second voltage output terminal 9, first voltage input terminal 6 are electrically connected with the 3rd power output end 106, second voltage input terminal 7 and
Two power output ends 104 are electrically connected；
4th diode D4, the anode of the 4th diode D4 are electrically connected with first voltage output terminal 8；
Discharger FD1, discharger FD1 are electrically connected between the cathode and second voltage output terminal 9 of the 4th diode D4；
3rd capacitance C3, the first end of the 3rd capacitance C3 are electrically connected with the cathode of the 4th diode D4；
High-frequency coupler 21, including the first couple input 211, the second couple input 213, the first coupled output
212 and second coupled output 214, the second couple input 213 be electrically connected with second voltage output terminal 9, the first coupling input
End 211 is electrically connected with the second end of the 3rd capacitance C3, and the first coupled output 212 is electrically connected with the first power output end 102, the
Two coupled outputs 214 are electrically connected with second source output terminal 104.
The course of work of the high-voltage arc ignition circuit 20 is line output transformer T2 output high voltage direct currents, the high voltage direct current
Winding between electric the first couple input 211 and the second couple input 213 through high-frequency coupler 21 gives the 3rd capacitance C3
Charging, when voltage reaches certain high pressure on the 3rd capacitance C3 (for example, break over voltage of discharger FD1), discharger FD1 starts
Electric discharge.3rd capacitance C3 recharges and electric discharge, produce high pressure resonance, 212 He of the first coupled output of high-frequency coupler 21
High pressure needed for the output striking of second coupled output 214.
Alternatively, high-frequency coupler 21 can also include two windings, and the turn ratio of the two windings is different, can pass through
Adjust the high-frequency and high-voltage that turn ratio adjusts the output to the first striking input terminal 401 and the second striking input terminal 402.
Alternatively, which can also include：3rd resistor R3, the first end of 3rd resistor R3 and second
Voltage output end 9 is electrically connected, and the second end of 3rd resistor R3 is electrically connected with discharger FD1 and the second couple input 213, is played
The effect of current-limiting protection.
Alternatively, which can also include：6th capacitance C4 and the 7th capacitance C5, the 6th capacitance C4 and
7th capacitance C5 is connected in parallel with the 3rd capacitance C3, is played the stability of the 3rd capacitance C3 of enhancing and was extended for the 3rd capacitance C3 longevity
The effect of life.
Example IV
Fig. 4 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention four provides.Referring to Fig. 4, this is non-
Contacting ignition arc circuit includes：Power supply 10, high-voltage arc ignition circuit 20 and boost pressure circuit 30.
Further, in conjunction with the embodiments two and embodiment three, boost pressure circuit 30 can specifically include：
First capacitance C14, the first end of the first capacitance C14 are electrically connected with the 3rd power output end 106；
Second capacitance C2, the anode of the second capacitance C2 are electrically connected with second source output terminal 104, the cathode of the second capacitance C2
It is electrically connected by being pressurized protection sub-circuit with the first power output end 102；
First diode D1, the cathode of the first diode D1 are electrically connected with the second end of the first capacitance C14, the first diode
The anode of D1 is electrically connected with second source output terminal 104；
Second diode D2, the anode of the second diode D2 are electrically connected with the cathode of the first diode D1, the second diode
The cathode of D2 is electrically connected with the cathode of the second capacitance C2.
High-voltage arc ignition circuit 20 can specifically include：
Line output transformer T2, including first voltage input terminal 6, second voltage input terminal 7,8 and of first voltage output terminal
Second voltage output terminal 9, first voltage input terminal 6 are electrically connected with the 3rd power output end 106, second voltage input terminal 7 and
Two power output ends 104 are electrically connected；
4th diode D4, the anode of the 4th diode D4 are electrically connected with first voltage output terminal 8；
Discharger FD1, discharger FD1 are electrically connected between the cathode and second voltage output terminal 9 of the 4th diode D4；
3rd capacitance C3, the first end of the 3rd capacitance C3 are electrically connected with the cathode of the 4th diode D4；
High-frequency coupler 21, including the first couple input 211, the second couple input 213, the first coupled output
212 and second coupled output 214, the second couple input 213 be electrically connected with second voltage output terminal 9, the first coupling input
End 211 is electrically connected with the second end of the 3rd capacitance C3, and the first coupled output 212 is electrically connected with the first power output end 102, the
Two coupled outputs 214 are electrically connected with second source output terminal 104.
The course of work of boost pressure circuit 30 and high-voltage arc ignition circuit 20 can be respectively referring to embodiment two and embodiment three, this reality
Apply and repeat no more.
Boost pressure circuit in the present embodiment is made of common and cheap diode, capacitance and resistance, and circuit cost is low
It is and simple in structure；Floating voltage is increased while security risk is avoided, so improve high-voltage arc ignition circuit striking into
Power；Meanwhile boost pressure circuit provides continual and steady voltage, caused electricity after high-voltage arc ignition circuit striking success can be maintained
Arc, improves the reliability of welding.
Embodiment five
Fig. 5 is a kind of structure diagram for non-contact arc ignition circuit that the embodiment of the present invention five provides.Referring to Fig. 5, this reality
Apply example and provide a kind of specific non-contact arc ignition circuit.The non-contact arc ignition circuit includes：Power supply 10, high-voltage arc strike electricity
Road 20, boost pressure circuit 30 and output protection circuit 60.
Further, on the basis of the various embodiments described above, which can specifically include：Main transformer T1,
The secondary of main transformer T1 includes centre cap 4, the first tap 3 and the second tap 5；It is defeated between first tap 3 and the second tap 5
The virtual value of the alternating voltage gone out is twice of the virtual value of the alternating voltage exported between the first tap 3 and centre cap 4.
Alternatively, the primary of main transformer T1 includes the 3rd tap 1 and the 4th tap 2, the 3rd tap 1 and the 4th tap 2
It is electrically connected respectively with external power supply, electric energy is provided for non-contact arc ignition circuit.
With continued reference to Fig. 5, on the basis of above-mentioned each technical solution, further, the first tap 3 can be used as the 3rd electricity
Source output terminal 106, the second tap 5 can be used as second source output terminal 104.
The non-contact arc ignition circuit can also include：
Full-wave rectifying circuit 11, including the 5th diode D1-3 and the 6th diode D4-6；
The anode of 5th diode D1-3 is electrically connected with the first tap 3；
The anode of 6th diode D4-6 is electrically connected with the second tap 5, the cathode of the 6th diode D4-6 and the five or two pole
The cathode of pipe D1-3 is electrically connected, and is used as the first power output end.
The operation principle of the full-wave rectifying circuit 11 is, when the first alternating voltage is positive half cycle, the current potential of the second tap 5
Higher than the current potential of centre cap 4.Supply voltage is exported to the first striking input terminal 401 through the 6th diode D4-6.When the first friendship
When galvanic electricity pressure is negative half period, the current potential of the first tap 3 is higher than the current potential of centre cap 4.Supply voltage is through the 5th diode D1-3
Export to the first striking input terminal 401.Waveform before and after 11 rectification of full-wave rectifying circuit is different from halfwave rectifier, main transformer
No matter T1 exports positive half cycle voltage or negative half period voltage, and the voltage exported to the first striking input terminal 401 is always in the same direction.Its
Two half-waves of alternating voltage are make use of, improve the efficiency of rectifier, and output voltage is more smooth.
Alternatively, which can also include the 4th resistance R4 and the 7th capacitance C7, the 4th resistance R4's
First end is electrically connected with the anode of the 5th diode D1-3, and the second end and the first end of the 7th capacitance C7 of the 4th resistance R4 are electrically connected
Connect, the second end of the 7th capacitance C7 is electrically connected with the cathode of the 5th diode D1-3, plays the role of filtering rectified voltage.Together
Reason, the full-wave rectifying circuit 11 can also include the 5th resistance R5 and the 8th capacitance C8, the first end and the 6th of the 5th resistance R5
The anode of diode D4-6 is electrically connected, and the second end of the 5th resistance R5 is electrically connected with the first end of the 8th capacitance C8, the 8th capacitance
The second end of C8 is electrically connected with the cathode of the 6th diode D4-6.So set and play protection the 5th diode D1-3 and the 6th
Effect without damage diode D4-6.
On the basis of above-mentioned each technical solution, which can also include：Output protection circuit 60, bag
Include varistor RV1, the 4th capacitance C6 and the 5th capacitance C1；The first end of the first end of varistor RV1 and the 4th capacitance C6
The cathode with the 6th diode D4-6 is electrically connected respectively；The second end of 4th capacitance C6 is grounded with the first end of the 5th capacitance C1,
The second end of varistor RV1 and the second end of the 5th capacitance C1 are electrically connected with centre cap 4 respectively.In non-contact arc ignition circuit
It is middle to set output protection circuit 60 to form the circuit of high-voltage arc ignition circuit, while also act bypass high-voltage signal, i.e. high pressure is drawn
The high-frequency and high-voltage that arc circuit produces will not pour in down a chimney into full-wave rectifying circuit 11, play protective effect.
In the present embodiment, in power supply 10 the 3rd tap 1 of main transformer T1 and the 4th tap 2 respectively with external power supply
It is electrically connected, electric energy is provided for non-contact arc ignition circuit.The cathode of the 6th diode D4-6 and the first striking are defeated in power supply 10
Enter end 401 to be electrically connected, the centre cap 4 of main transformer T1 is electrically connected with the second striking input terminal 402, to the first striking input terminal
401 and second export the first DC voltage between striking input terminal 402.
The centre cap of the first voltage input terminal 6 of line output transformer T2 and main transformer T1 in high-voltage arc ignition circuit 20
4 are electrically connected, and second voltage input terminal 7 is electrically connected with the first tap 3 of main transformer T1, and electric arc is produced for high-voltage arc ignition circuit 20
Electric energy is provided.The first coupled output 212 and the second coupled output 214 of high-frequency coupler 21 are inputted with the first striking respectively
401 and second striking input terminal 402 of end is electrically connected, and is produced between the first striking input terminal 401 and the second striking input terminal 402
Electric arc.
The first end of first capacitance C14 and the electricity of the first tap 3 of main transformer T1 in power supply 10 in boost pressure circuit 30
Connection, the cathode of the second capacitance C2 are electrically connected with the first striking input terminal 401, and the anode of the second capacitance C2 couples output with first
End 212 is electrically connected, and exports the second DC voltage between the first striking input terminal 401 and the first coupled output 212, second is straight
The value of galvanic electricity pressure is more than the value of the first DC voltage, improves the arcing initiation success rate that electric arc produces initial stage.
Alternatively, the first tap 3 of main transformer T1 through inductance L1 respectively with the supercharging input terminal of boost pressure circuit 30 and
The high voltage input terminal of high-voltage arc ignition circuit 20 is electrically connected.
In output protection circuit 60 first end and second end of varistor RV1 respectively with the first striking input terminal 401 and
First coupled output 212 is electrically connected.Output protection circuit 60 forms the circuit of high-voltage arc ignition circuit 20, while prevents first to draw
High pressure between 401 and first coupled output 212 of arc input terminal is poured in down a chimney into power supply 10, burns out first device of power supply 10
Part, plays the role of protecting power supply 10.
Embodiment six
Fig. 6 is a kind of structure diagram for argon arc welding machine that the embodiment of the present invention six provides.Referring to Fig. 6, in above-mentioned each reality
On the basis of applying example, which includes welding gun 920, welding ground folder 930 and fuselage 901；Fuselage 901 includes the present invention and appoints
The non-contact arc ignition circuit that one embodiment provides.Wherein, the input terminal of welding gun 920 is electrically connected with the second striking input terminal 402, weldering
The input terminal of earthing clamp 930 is electrically connected with the first striking input terminal 401, to be pressed from both sides in the output terminal of welding gun 920 and welding ground
Electric arc is produced between 930 output terminal.
When operating the argon arc welding machine, the output terminal of welding ground folder 930 clamps workpiece, at this time due to high-voltage arc ignition circuit
Effect, there are high pressure between the output terminal and workpiece of welding gun 920, air between welding gun 920 and workpiece because of high-voltage breakdown,
Electric arc is produced, workpiece is welded；The electric arc can be maintained under the action of the second DC voltage that boost pressure circuit produces,
High-voltage arc ignition circuit and boost pressure circuit are then turned off, electric arc continues to tie up under the action of the first DC voltage that power supply produces
Hold, realize the effect of reliable and stable welding workpiece.
Argon arc welding machine provided in this embodiment sets the first supercharging output terminal and the first striking input terminal 401 of boost pressure circuit
It is electrically connected, and the second supercharging output terminal is electrically connected with the first high-voltage pulse output terminal 202, for being given birth to according to the first alternating voltage
Into the second DC voltage, and apply to the first striking input terminal 401 and the second striking input terminal 402, pilot arc, the second direct current
The value of voltage is more than the value of the first DC voltage.Technical solution provided in this embodiment is substantially in non-contact arc ignition circuit
Boost pressure circuit is added, the floating voltage of the incipient stage non-contact arc ignition circuit produced in electric arc is improved, improves striking
Success rate；In the maintenance stage of electric arc, still using the first relatively low DC voltage of voltage, non-contact arc ignition circuit is reduced
Loss.Therefore, the present invention solves the problems, such as the argon arc welding machine of non-contact striking there are poor reliability and arcing initiation success rate are relatively low,
Improve non-contact arc ignition circuit arcing initiation success rate and reliability.
Note that it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
It can include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (9)
- A kind of 1. non-contact arc ignition circuit, it is characterised in that including：Power supply, including multiple power output ends, respectively the first striking input terminal with the non-contact arc ignition circuit, high pressure The high voltage input terminal of arc ignition circuit and the supercharging input terminal of boost pressure circuit are electrically connected, for being exported to the first striking input terminal First DC voltage, and input the first alternating voltage to the high voltage input terminal and the supercharging input terminal；High-voltage arc ignition circuit, including the first high-voltage pulse output terminal and the second high-voltage pulse output terminal, first high-voltage pulse Output terminal is electrically connected with a power output end, for producing high-voltage pulse according to first alternating voltage, and is applied To the first striking input terminal and the second striking input terminal, to produce electric arc；Boost pressure circuit, including the first supercharging output terminal and the second supercharging output terminal, the first supercharging output terminal of the boost pressure circuit It is electrically connected with the first striking input terminal, the second supercharging output terminal is electrically connected with the first high-voltage pulse output terminal, For generating the second DC voltage according to first alternating voltage, and apply to the first striking input terminal and described first High-voltage pulse output terminal, maintains the electric arc, and the value of second DC voltage is more than the value of first DC voltage.
- 2. non-contact arc ignition circuit according to claim 1, it is characterised in that the value of second DC voltage is described Between 1.5 to 2.5 times of the value of first DC voltage.
- 3. non-contact arc ignition circuit according to claim 1, it is characterised in that power supply is exported including the first power supply End, second source output terminal and the 3rd power output end, first power output end and second source output terminal difference It is electrically connected with the first striking input terminal and the second supercharging output terminal；The boost pressure circuit includes：First capacitance, the first end of first capacitance are electrically connected with the 3rd power output end；Second capacitance, the anode of second capacitance are electrically connected with the second source output terminal, the cathode of second capacitance It is electrically connected with first power output end；First diode, the cathode of first diode are electrically connected with the second end of first capacitance, the one or two pole The anode of pipe is electrically connected with the second source output terminal；Second diode, the anode of second diode are electrically connected with the cathode of first diode, the two or two pole The cathode of pipe is electrically connected with the cathode of second capacitance.
- 4. non-contact arc ignition circuit according to claim 3, it is characterised in that the boost pressure circuit further includes：Supercharging is protected Protect sub-circuit；The cathode of second capacitance protects sub-circuit to be electrically connected with first power output end by the supercharging；The supercharging protection sub-circuit includes：3rd diode, first resistor and second resistance；The anode of 3rd diode It is electrically connected with the cathode of second capacitance, the cathode of the 3rd diode is electrically connected with the first end of the second resistance, The second end of the second resistance is electrically connected with first power output end, the first end of the first resistor and the described 3rd The anode of diode is electrically connected, and the second end of the first resistor is electrically connected with the second end of the second resistance.
- 5. non-contact arc ignition circuit according to claim 3, it is characterised in that the high-voltage arc ignition circuit includes：Line output transformer, including first voltage input terminal, second voltage input terminal, first voltage output terminal and second voltage are defeated Outlet, the first voltage input terminal are electrically connected with the 3rd power output end, the second voltage input terminal and described the Two power output ends are electrically connected；4th diode, the anode of the 4th diode are electrically connected with the first voltage output terminal；Discharger, the discharger are electrically connected between cathode and the second voltage output terminal of the 4th diode；3rd capacitance, the first end of the 3rd capacitance are electrically connected with the cathode of the 4th diode；High-frequency coupler, including the first couple input, the second couple input, the first coupled output and the second coupling output End, second couple input are electrically connected with the second voltage output terminal, first couple input and the described 3rd The second end of capacitance is electrically connected, and first coupled output is electrically connected with first power output end, second coupling Output terminal is electrically connected with the second source output terminal.
- 6. non-contact arc ignition circuit according to claim 3, it is characterised in that the power supply includes：Main transformer, The secondary of the main transformer includes centre cap, the first tap and the second tap；The virtual value of the alternating voltage exported between first tap and second tap is first tap and described Twice of the virtual value of the alternating voltage exported between centre cap.
- 7. non-contact arc ignition circuit according to claim 6, it is characterised in that first tap is as the described 3rd electricity Source output terminal, second tap is as the second source output terminal；The non-contact arc ignition circuit further includes：Full-wave rectifying circuit, including the 5th diode and the 6th diode；The anode of 5th diode is electrically connected with first tap；The anode of 6th diode is electrically connected with second tap, the cathode and the described 5th 2 of the 6th diode The cathode of pole pipe is electrically connected, and is used as first power output end.
- 8. non-contact arc ignition circuit according to claim 7, it is characterised in that further include：Output protection circuit, including varistor, the 4th capacitance and the 5th capacitance；The first end of the varistor and described Cathode of the first end of four capacitances respectively with the 6th diode is electrically connected；The second end and the described 5th of 4th capacitance The first end ground connection of capacitance, the second end of the second end of the varistor and the 5th capacitance respectively with the centre cap It is electrically connected.
- 9. a kind of argon arc welding machine, it is characterised in that including welding gun, welding ground folder and fuselage；The fuselage includes the non-contact arc ignition circuit of claim 1-8 any one of them；Wherein, the input terminal of the welding gun is electrically connected with the second striking input terminal, the input terminal of welding ground folder with The first striking input terminal is electrically connected, to be produced between the output terminal of the output terminal of the welding gun and welding ground folder Electric arc.
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| CN201711483741.XA CN108015387B (en) | 2017-12-29 | 2017-12-29 | Non-contact arc striking circuit and argon arc welding machine |
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| CN201711483741.XA CN108015387B (en) | 2017-12-29 | 2017-12-29 | Non-contact arc striking circuit and argon arc welding machine |
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Cited By (1)
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| CN114050733A (en) * | 2021-11-19 | 2022-02-15 | 杭州凯尔达电焊机有限公司 | Lifting arc striking anti-sticking welding control circuit and welding power supply |
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