CN108340048B - Contactless arc ignition circuit for argon arc welding machine - Google Patents
Contactless arc ignition circuit for argon arc welding machine Download PDFInfo
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- CN108340048B CN108340048B CN201711479472.XA CN201711479472A CN108340048B CN 108340048 B CN108340048 B CN 108340048B CN 201711479472 A CN201711479472 A CN 201711479472A CN 108340048 B CN108340048 B CN 108340048B
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- 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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The present invention provides a kind of contactless arc ignition circuit for argon arc welding machine.The present invention includes high-frequency arc strike control circuit, high-frequency arc ignition circuit and auxiliary arc ignition circuit.When arc welding gun switch closure, high-frequency arc strike control circuit handles control system and issues pulse signal HFc, triode Q1 conducting, and switch K1 and K2 primary side has electric current to flow through；High-frequency arc ignition circuit switch K1 and K2 pair side is closed the alternating current of the first secondary windings of main transformer primary side, after circuit occurs for voltage-multiplying circuit and high frequency, by striking inductance, acts on welding machine output negative pole OUT-；Meanwhile the striking signal HFc for assisting arc ignition circuit processing control system to issue, metal-oxide-semiconductor Q4 is connected, then the alternating current of main transformer primary side second subprime winding, after diode D12 rectification, acts on welding machine output cathode OUT+ through metal-oxide-semiconductor Q4；To the electric arc that ignites.Electromagnetic interference and striking noise when circuit of the present invention can greatly reduce striking improve arcing initiation success rate.
Description
Technical field
The present invention relates to the circuits in a kind of electric welding machine, and in particular, to a kind of to draw for the contactless of argon arc welding machine
Arc circuit.
Background technique
Currently, there are two types of the modes of the striking of argon arc welding machine.One is contacting ignition arc, this striking mode circuit is simple,
But when striking, it is easy to cause weld seam tungsten inclusion, tungsten needle loss is big and influences weldquality.Another striking mode is non-contact draws
The problem of arc achievees the purpose that striking using high-frequency and high-voltage breakdown argon gas, and this striking mode can solve weld seam tungsten inclusion.But
Traditional non-contact striking, does arc ignition circuit using high voltage package, there is that electromagnetic interference is big, and striking noise is big, and arcing initiation success rate is low
Disadvantage.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of contactless strikings for argon arc welding machine
Circuit.
A kind of contactless arc ignition circuit for argon arc welding machine provided according to the present invention, including high-frequency arc strike control electricity
Road, high-frequency arc ignition circuit and auxiliary arc ignition circuit；
The high-frequency arc strike control circuit is connected with high-frequency arc ignition circuit, auxiliary arc ignition circuit respectively.
Preferably, high-frequency arc strike control circuit is according to pulse signal HFc, the actuation of control switch K1 and switch K2；
In the actuation of switch K1 and switch K2, high-frequency arc ignition circuit forms high voltage high frequency bursts, then through striking inductance L1,
It is eventually coupled to welding machine output negative pole OUT-；
When arc welding gun switch is pressed, welding machine output cathode OUT+ is by assisting arc ignition circuit to be coupled to the high pressure of same frequency
Pulse, the high voltage high frequency bursts being coupled to welding machine output negative pole OUT- by high-frequency arc ignition circuit, collective effect puncture argon gas,
Ignite electric arc.
Preferably, high-frequency arc strike control circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, diode
D1, diode D2, operational amplifier U1D, capacitor C1, triode Q1, relay K1A；The relay K1A includes switch K1
The control unit of control unit, switch K2；
One end of the resistance R1 constitutes first voltage connecting pin；
The other end of the resistance R1 is respectively connected to the inverting input terminal of one end of resistance R2, operational amplifier U1D；
The other end of the resistance R2 is grounded；
The resistance R3 is in parallel with diode D1；
The normal phase input end of the operational amplifier U1D be respectively connected to one end of resistance R3, diode D1 cathode with
And one end of capacitor C1；
The anode that the other end of the resistance R3 is connected to diode D1 forms the end pulse signal HFc；
The output end of the operational amplifier U1D is connected to one end of resistance R4；
The other end of the resistance R4 is respectively connected to the base stage of one end of resistance R5, triode Q1；
The other end of the resistance R5 is respectively connected to the emitter of the other end of capacitor C1, triode Q1, and is grounded；
The collector of the triode Q1 is respectively connected to the anode of one end of relay K1A, diode D2；
The cathode of the diode D2, the other end of relay K1A are connected to second source connecting pin；
The voltage value of first power connector end is higher than the voltage value of second source connecting pin.
Preferably, the high-frequency arc ignition circuit includes voltage-multiplying circuit, high-frequency arc strike sub-circuit；
The voltage-multiplying circuit, high-frequency arc strike sub-circuit are connected with each other.
Preferably, the high-frequency arc strike sub-circuit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance
It is R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, relay K2B, diode D7, diode D8, two-way
Transistor D9, diode D10, diode D12, capacitor C12, capacitor C13, capacitor C14, striking inductance L1, IGBT pipe Q2 and
Thyristor Q3；
Control unit one end of the switch K1 is connected to one end of resistance R6；
The other end of the resistance R6 is divided into multiple branches；
The first branch of the other end of the resistance R6 is that resistance R7 and resistance R8 is connected in series；
Wherein, the other end of resistance R6 is connected to one end of resistance R7；
The other end of the resistance R7 is connected to one end of resistance R8；
The second branch of the other end of the resistance R6 is voltage-multiplying circuit；
Wherein the other end of resistance R6 is connected to the input terminal of voltage-multiplying circuit；
The other end of the resistance R8, the output end of voltage-multiplying circuit are connected to the anode of diode D7；
The cathode of the diode D7 be respectively connected to the collector of IGBT pipe Q2, one end of resistance R9, resistance R10 one
End；
The emitter of the IGBT pipe Q2 is respectively connected to one end of one end of resistance R13, resistance R14；
The other end of the resistance R13, the other end of resistance R14 are connected to the anode of thyristor Q3, diode D8
One end of anode, the cathode of diode D10, one end of resistance R15 and capacitor C14；
The base stage of the IGBT pipe Q2 is respectively connected to the cathode of the other end of resistance R9, diode D8；
The cathode of the thyristor Q3 is respectively connected to one end of one end of resistance R11, bidirectional transistor D9；
The other end of the resistance R11 is connected to one end of resistance R12；
One end of the bidirectional transistor D9 is respectively connected to one end of capacitor C12, one end of capacitor C13 and relay
One end of K1B；
The other end of the relay K1B is connected to the other end of resistance R10；
The anode of the diode D10 is respectively connected to the other end and resistance of the cathode of diode D12, resistance R15
One end of R16；
Wherein, the other end of resistance R15 is connected to one end of resistance R16；
The other end of the capacitor C14 is connected to the input terminal A of striking inductance L1；
The input terminal B of the striking inductance L1, the other end of resistance R16, the cathode of thyristor Q3, resistance R12 it is another
End, the capacitor C6 in the other end of capacitor C13, the other end of capacitor C12, voltage-multiplying circuit, capacitor C7 and diode D3 connect
It is connected to switch K2；
Striking inductance L1 output end corresponding with input terminal A connects welding machine output negative pole Out-, striking inductance L1's
Output end ground connection corresponding with input terminal B；
The control unit other end of the switch K1, the control unit other end of switch K2 connect first grade of main transformer primary side
Winding.
Preferably, the auxiliary arc ignition circuit includes resistance R17, resistance R18, resistance R19, resistance 20, resistance 21, two poles
Pipe D13, diode D14, voltage-stabiliser tube D15, capacitor C15, capacitor C16, metal-oxide-semiconductor Q4 and optocoupler U2；
One end of the resistance R17 is connected to the other end of the relay K1A of high-frequency arc strike control circuit；
The other end of the resistance R17 is connected to the anode of diode D13；
The cathode of the diode D13 is respectively connected to the leakage of one end of capacitor C15, one end of resistance R18, metal-oxide-semiconductor Q4
Pole；
The other end of the capacitor C15, the second pin of optocoupler U2 are grounded；
The other end of the resistance R18 is connected to the anode of diode D14；
The cathode of the diode D14 is respectively connected to one end of capacitor C16, the cathode of voltage-stabiliser tube D15 and optocoupler U2
The 4th pin；
The anode of the voltage-stabiliser tube D15, the other end of capacitor C16 are connected to welding machine output cathode Out+；
The third pin of the optocoupler U2 is connected to one end of resistance R20；
The other end of the resistance R20 is respectively connected to the grid of one end of resistance R21, metal-oxide-semiconductor Q4；
The drain electrode of the other end, metal-oxide-semiconductor Q4 of the resistance R21 is connected to
Welding machine output cathode Out+；The first pin of optocoupler U2 connects the end pulse signal HFc by a resistance；
The first pin of optocoupler U2, the second pin of optocoupler U2 are the anode of optocoupler U2 light emitting source, cathode, optocoupler U2 respectively
Third pin, optocoupler U2 the 4th pin be emitter, collector respectively.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The present invention acts on welding machine output negative pole using high-frequency arc ignition circuit, and auxiliary arc ignition circuit is acting on welding machine output just
Pole has electromagnetic interference small, and striking noise is small, the high advantage of arcing initiation success rate.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is high-frequency arc strike control circuit schematic diagram of the present invention for the contactless arc ignition circuit of argon arc welding machine.
Fig. 2 is high-frequency arc ignition circuit schematic diagram of the present invention for the contactless arc ignition circuit of argon arc welding machine.
Fig. 3 is auxiliary arc ignition circuit schematic diagram of the present invention for the contactless arc ignition circuit of argon arc welding machine.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
As shown in Figure 1 to Figure 3, the present invention provides a kind of contactless arc ignition circuits for argon arc welding machine, including height
Frequency striking arc control circuit, high-frequency arc ignition circuit and auxiliary arc ignition circuit；The high-frequency arc strike control circuit is drawn with high frequency respectively
Arc circuit, auxiliary arc ignition circuit are connected.High-frequency arc strike control circuit is according to pulse signal HFc, control switch K1 and switch K2
Actuation；In the actuation of switch K1 and switch K2, high-frequency arc ignition circuit forms high voltage high frequency bursts, then through striking inductance L1,
It is eventually coupled to welding machine output negative pole OUT-；When arc welding gun switch is pressed, welding machine output cathode OUT+ passes through auxiliary arc ignition circuit
It is coupled to the high-voltage pulse of same frequency, the high voltagehigh frequency arteries and veins being coupled to welding machine output negative pole OUT- by high-frequency arc ignition circuit
Punching, collective effect puncture argon gas, and ignite electric arc.
As shown in Figure 1, the high-frequency arc strike control circuit include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5,
Diode D1, diode D2, operational amplifier U1D, capacitor C1, triode Q1, relay K1A；The relay K1A includes opening
Close the control unit of K1, the control unit of switch K2；The control unit of switch K1, the control unit of switch K1 are respectively the defeated of relay K1A
Entry loop, output loop, or it is referred to as control system, by control system, switch K2 is similarly；One end structure of the resistance R1
At first voltage connecting pin, such as 15V power connector end；The other end of the resistance R1 be respectively connected to resistance R2 one end,
The inverting input terminal of operational amplifier U1D；The other end of the resistance R2 is grounded；The resistance R3 is in parallel with diode D1；Institute
The normal phase input end for stating operational amplifier U1D is respectively connected to one end of resistance R3, the cathode of diode D1 and capacitor C1
One end；The anode that the other end of the resistance R3 is connected to diode D1 forms the end pulse signal HFc；The operational amplifier
The output end of U1D is connected to one end of resistance R4；The other end of the resistance R4 is respectively connected to one end of resistance R5, triode
The base stage of Q1；The other end of the resistance R5 is respectively connected to the emitter of the other end of capacitor C1, triode Q1, and is grounded；
The collector of the triode Q1 is respectively connected to the anode of one end of relay K1A, diode D2；The cathode of diode D2,
The other end of relay K1A connects second source connecting pin, such as 12V power connector end.The voltage value of first power connector end
Higher than the voltage value of second source connecting pin.
As shown in Fig. 2, the high-frequency arc ignition circuit includes voltage-multiplying circuit, high-frequency arc strike sub-circuit；The voltage-multiplying circuit, height
Frequency striking arc sub-circuit is connected with each other.
The high-frequency arc strike sub-circuit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, electricity
Hinder R12, resistance R13, resistance R14, resistance R15, resistance R16, relay K1B, relay K2B, the high-frequency arc strike in as Fig. 1
The relay K1A of control circuit, the control unit of control unit, switch K2 including switch K1, for the ease of distinguishing two circuits, because
The relay of high-frequency arc strike sub-circuit in Fig. 2 is named as K2B by this, i.e. K2B includes switch K1, switch K2；Diode D7,
Diode D8, bidirectional transistor D9, diode D10, diode D12, capacitor C12, capacitor C13, capacitor C14, striking inductance L1,
IGBT pipe Q2 and thyristor Q3；One end of the first branch of the relay K2B, control unit one end connection of as switch K1
To one end of resistance R6；The other end of the resistance R6 is divided into multiple branches；The first branch of the other end of the resistance R6 is
Resistance R7 and resistance R8 is connected in series；Wherein, the other end of resistance R6 is connected to one end of resistance R7；The resistance R7's is another
End is connected to one end of resistance R8；The second branch of the other end of the resistance R6 is voltage-multiplying circuit；Wherein, resistance R6's is another
End is connected to the input terminal of voltage-multiplying circuit；The other end of the resistance R8, the output end of voltage-multiplying circuit are connected to diode D7
Anode；The cathode of the diode D7 be respectively connected to the collector of IGBT pipe Q2, one end of resistance R9, resistance R10 one
End；The emitter of the IGBT pipe Q2 is respectively connected to one end of one end of resistance R13, resistance R14；The resistance R13's is another
One end, resistance R14 the other end be connected to the anode of thyristor Q3, the anode of diode D8, the cathode of diode D10, electricity
Hinder one end of R15 and one end of capacitor C14；The base stage of the IGBT pipe Q2 is respectively connected to the other end of resistance R9, two poles
The cathode of pipe D8；The control electrode of the thyristor Q3 is respectively connected to one end of one end of resistance R11, bidirectional transistor D9；Institute
The other end for stating resistance R11 is connected to one end of resistance R12；One end of the bidirectional transistor D9 is respectively connected to capacitor C12
One end, one end of capacitor C13 and one end of relay K1B；The other end of the relay K1B is connected to resistance R10's
The other end；The anode of the diode D10 is respectively connected to the other end and resistance of the cathode of diode D12, resistance R15
One end of R16；Wherein, the other end of resistance R15 is connected to one end of resistance R16；The other end of the capacitor C14, which is connected to, to be drawn
The input terminal A of arc inductance L1；Input terminal B, the other end of resistance R16, the cathode of thyristor Q3, the resistance of the striking inductance L1
The other end of R12, the other end of capacitor C13, the other end of capacitor C12, the capacitor C6 in voltage-multiplying circuit, capacitor C7 and two poles
Pipe D3 is connected to one end of the second branch of relay K2B, as one end of the control unit of switch K2.Striking inductance L1 with it is defeated
Enter to hold output end corresponding with the input terminal B ground connection of the corresponding output end connection welding machine output negative pole Out-, striking inductance L1 of A；
The other end of the other end of the first branch of the relay K2B, as the control unit other end of switch K1, second branch, i.e.,
The other end for the control unit of switch K2 connects the first secondary windings of main transformer primary side.The IGBT pipe mentioned among the above, as
Insulated gate bipolar transistor, (Insulated Gate Bipolar Transistor, IGBT).
As shown in figure 3, the auxiliary arc ignition circuit include resistance R17, resistance R18, resistance R19, resistance 20, resistance 21,
Diode D13, diode D14, voltage-stabiliser tube D15, capacitor C15, capacitor C16, metal-oxide-semiconductor Q4 and optocoupler U2；The resistance R17's
One end is connected to the other end of the relay K1A of high-frequency arc strike control circuit；The other end of the resistance R17 is connected to diode
The anode of D13；The cathode of the diode D13 is respectively connected to one end of capacitor C15, one end of resistance R18, metal-oxide-semiconductor Q4
Drain electrode；The other end of the capacitor C15, the second pin of optocoupler U2 are grounded；The other end of the resistance R18 is connected to two poles
The anode of pipe D14；The cathode of the diode D14 is respectively connected to the cathode and light of one end of capacitor C16, voltage-stabiliser tube D15
The 4th pin of coupling U2；The anode of the voltage-stabiliser tube D15, the other end of capacitor C16 are connected to welding machine output cathode Out+；Institute
The third pin for stating optocoupler U2 is connected to one end of resistance R20；The other end of the resistance R20 is respectively connected to resistance R21's
One end, metal-oxide-semiconductor Q4 grid；The drain electrode of the other end, metal-oxide-semiconductor Q4 of the resistance R21 is connected to welding machine output cathode Out+；
The first pin of optocoupler U2 connects the end pulse signal HFc by a resistance.The second pin of the first pin of optocoupler U2, optocoupler U2
Anode, the cathode of optocoupler U2 light emitting source respectively, the third pin of optocoupler U2, the 4th pin of optocoupler U2 be respectively emitter,
Collector.
Working principle provided by the invention is further described below:
As shown in Figure 1, the pulse signal HFc that control system issues setting is added in pulse signal when arc welding gun switch is pressed
The end HFc.When pulse signal HFc is that height, such as 15V power supply quickly give capacitor C1 by diode D1 when as voltage is 15V
15V is charged to, the normal phase input end of operational amplifier U1D is sent into；15V power supply is sent into after resistance R1 and resistance R2 partial pressure
The inverting input terminal of operational amplifier U1D；At this point, then being transported since operational amplifier U1D normal phase input end is greater than inverting input terminal
Calculating amplifier U1D output voltage is height, and for the output voltage after resistance R4 and resistance R5 partial pressure, driving is preferably NPN's
Triode Q1 conducting, then relay K1 and relay K2 primary side have electric current to flow through, and relay K1 and relay K2 are attracted.
When pulse signal HFc is low, such as voltage is 0V, capacitor C1 both end voltage is slowly discharged by resistance R3, is made
It obtains pulse signal HFc to be overturn again to be high, for example, 15V, before OV reaches 15V, the voltage at the both ends capacitor C1 is always more than fortune
The inverting input terminal voltage of amplifier U1D is calculated, then the input voltage of operational amplifier U1D is height, for example, 15V, triode Q1 is led
Logical, relay K1 and relay K2 are attracted.Then high-frequency arc strike control circuit, guarantee when there is the pulse signal HFc of certain frequency,
Relay K1 and relay K2 is in attracting state.
As shown in Fig. 2, connecing the high frequency of the first secondary windings of main transformer primary side after relay K1 and relay K2 is attracted
Alternating current is via electrolytic capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor
4 voltage-multiplying circuits that C10, capacitor C11 and diode D3, diode D4, diode D5, diode D6 are formed, then through diode D7
Afterwards, become high voltage direct current, resistance R6 is current-limiting resistance in figure, and resistance R7 and resistance R8 are absorption resistance.
The high voltage direct current of diode D7 after resistance R15 and resistance R16, is managed in IGBT through resistance R9, zener diode D8
Conducting voltage, IGBT pipe Q2 conducting are generated between the GE of Q2.Then the high voltage direct current of diode D7 passes through IGBT pipe Q2, resistance R13
With resistance R14 give capacitor C14 charging, when capacitor C14 both end voltage reaches certain value, IGBT pipe Q2 by.Diode simultaneously
The high voltage direct current of D7 cathode charges by resistance R10, relay K1 to capacitor C12, capacitor C13, when voltage is more than two-way steady
When the threshold voltage of pressure pipe D9, bi-directional voltage stabilizing pipe D9 conducting, and thyristor Q3 is driven to be connected.After thyristor Q3 conducting, capacitor C14
It is discharged by thyristor Q3, simultaneously because capacitor C14 and striking inductance L1 resonance, at the end B of striking inductance L1, i.e. striking inductance
The input terminal B of L1 generates positive phase voltage, forms reverse voltage on thyristor Q3 after diode D10 and diode D11 clamp,
Thyristor Q3 by.
The high voltage direct current of diode D7 cathode is filled again by IGBT pipe Q2 and resistance R13, resistance R14 to capacitor C14
Electricity, after capacitor C14 voltage is charged to certain value, IGBT pipe Q2 by.The high direct voltage of diode D7 cathode is again by resistance
R10 charges to capacitor C12, capacitor C13, reaches bidirectional transistor D9 threshold values, conducting thyristor Q3, into next concussion week
Phase.Resistance R11 and resistance R12 is discharge resistance in figure.High voltage high frequency bursts are finally formed on capacitor C14, then through striking electricity
Feel L1, is eventually coupled to welding machine output negative pole.
As shown in figure 3, control system issues the pulse signal HFc with certain frequency when arc welding gun switch is pressed, when
When HFc signal is high, optocoupler U2 is connected by resistance R19；Meanwhile main transformer primary side second subprime winding alternating current passes through
Resistance R17 is rectified by diode D12, is transformed into high voltage direct current after capacitor C15 filtering；When optocoupler U2 conducting, the height
Straightening galvanic electricity is on the one hand through resistance R18, diode D13, optocoupler U2, then after resistance R20 and resistance R21 partial pressure, drives metal-oxide-semiconductor
Q4 conducting, diode D14 play pressure stabilization function, and electrolytic capacitor C16 is played a filtering role；On the other hand the high voltage direct current is connected
Q4 is coupled to welding machine output cathode OUT+.When HFc signal is low, optocoupler U2 and metal-oxide-semiconductor Q4 are not turned on, and assist arc ignition circuit
There is no voltage to be coupled to welding machine output cathode OUT+.Therefore, when arc welding gun switch is pressed, control system, which issues, has certain frequency
Pulse signal HFc, welding machine output cathode OUT+ can by assisting arc ignition circuit be coupled to the high-voltage pulse of same frequency, with
The high-frequency and high-voltage that welding machine output negative pole OUT- is coupled to by high-frequency arc ignition circuit, collective effect puncture argon gas, and ignite electric arc.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (3)
1. a kind of contactless arc ignition circuit for argon arc welding machine, which is characterized in that including high-frequency arc strike control circuit, high frequency
Arc ignition circuit and auxiliary arc ignition circuit；
The high-frequency arc strike control circuit is connected with high-frequency arc ignition circuit, auxiliary arc ignition circuit respectively；
The high-frequency arc strike control circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, diode D1, two poles
Pipe D2, operational amplifier U1D, capacitor C1, triode Q1, relay K1A；The relay K1A include switch K1 control unit,
The control unit of switch K2；
One end of the resistance R1 constitutes first voltage connecting pin；
The other end of the resistance R1 is respectively connected to the inverting input terminal of one end of resistance R2, operational amplifier U1D；
The other end of the resistance R2 is grounded；
The resistance R3 is in parallel with diode D1；
The normal phase input end of the operational amplifier U1D is respectively connected to the cathode and electricity of one end of resistance R3, diode D1
Hold one end of C1；
The anode that the other end of the resistance R3 is connected to diode D1 forms the end pulse signal HFc；
The output end of the operational amplifier U1D is connected to one end of resistance R4；
The other end of the resistance R4 is respectively connected to the base stage of one end of resistance R5, triode Q1；
The other end of the resistance R5 is respectively connected to the emitter of the other end of capacitor C1, triode Q1, and is grounded；
The collector of the triode Q1 is respectively connected to the anode of one end of relay K1A, diode D2；
The cathode of the diode D2, the other end of relay K1A are connected to second source connecting pin；
The voltage value of first power connector end is higher than the voltage value of second source connecting pin；
The high-frequency arc strike sub-circuit includes resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance
R12, resistance R13, resistance R14, resistance R15, resistance R16, relay K1B, diode D7, diode D8, bidirectional transistor D9,
Diode D10, diode D12, capacitor C12, capacitor C13, capacitor C14, striking inductance L1, IGBT pipe Q2 and thyristor Q3；
Control unit one end of the switch K1 is connected to one end of resistance R6；
The other end of the resistance R6 is divided into multiple branches；
The first branch of the other end of the resistance R6 is that resistance R7 and resistance R8 is connected in series；
Wherein, the other end of resistance R6 is connected to one end of resistance R7；
The other end of the resistance R7 is connected to one end of resistance R8；
The second branch of the other end of the resistance R6 is voltage-multiplying circuit；
Wherein the other end of resistance R6 is connected to the input terminal of voltage-multiplying circuit；
The other end of the resistance R8, the output end of voltage-multiplying circuit are connected to the anode of diode D7；
The cathode of the diode D7 is respectively connected to one end of the collector of IGBT pipe Q2, one end of resistance R9, resistance R10；
The emitter of the IGBT pipe Q2 is respectively connected to one end of one end of resistance R13, resistance R14；
The other end of the resistance R13, the other end of resistance R14 be connected to the anode of thyristor Q3, diode D8 anode,
One end of the cathode of diode D10, one end of resistance R15 and capacitor C14；
The base stage of the IGBT pipe Q2 is respectively connected to the cathode of the other end of resistance R9, diode D8；
The control electrode of the thyristor Q3 is respectively connected to one end of one end of resistance R11, bidirectional transistor D9；
The other end of the resistance R11 is connected to one end of resistance R12；
One end of the bidirectional transistor D9 is respectively connected to one end of capacitor C12, one end of capacitor C13 and relay K1B
One end；
The other end of the relay K1B is connected to the other end of resistance R10；
The anode of the diode D10 is respectively connected to the cathode of diode D12, the other end of resistance R15 and resistance R16's
One end；
Wherein, the other end of resistance R15 is connected to one end of resistance R16；
The other end of the capacitor C14 is connected to the input terminal A of striking inductance L1；
The input terminal B of the striking inductance L1, the other end of resistance R16, the cathode of thyristor Q3, resistance R12 the other end, electricity
Hold the other end of C13, the other end of capacitor C12, the capacitor C6 in voltage-multiplying circuit, capacitor C7 and diode D3 to be connected to out
Close one end of the control unit of K2；
Striking inductance L1 output end corresponding with input terminal A connects welding machine output negative pole Out-, striking inductance L1 with it is defeated
Enter to hold the corresponding output end ground connection of B；
The control unit other end of the switch K1, switch K2 control unit other end connection first grade of main transformer primary side around
Group；
The auxiliary arc ignition circuit includes resistance R17, resistance R18, resistance R19, resistance 20, resistance 21, diode D13, two poles
Pipe D14, voltage-stabiliser tube D15, capacitor C15, capacitor C16, metal-oxide-semiconductor Q4 and optocoupler U2；
One end of the resistance R17 is connected to the other end of the relay K1A of high-frequency arc strike control circuit；
The other end of the resistance R17 is connected to the anode of diode D13；
The cathode of the diode D13 is respectively connected to the drain electrode of one end of capacitor C15, one end of resistance R18, metal-oxide-semiconductor Q4；
The other end of the capacitor C15, the second pin of optocoupler U2 are grounded；
The other end of the resistance R18 is connected to the anode of diode D14；
The cathode of the diode D14 is respectively connected to the of one end of capacitor C16, the cathode of voltage-stabiliser tube D15 and optocoupler U2
Four pins；
The anode of the voltage-stabiliser tube D15, the other end of capacitor C16 are connected to welding machine output cathode Out+；
The third pin of the optocoupler U2 is connected to one end of resistance R20；
The other end of the resistance R20 is respectively connected to the grid of one end of resistance R21, metal-oxide-semiconductor Q4；
The drain electrode of the other end, metal-oxide-semiconductor Q4 of the resistance R21 is connected to welding machine output cathode Out+；The first of optocoupler U2 is drawn
Foot connects the end pulse signal HFc by a resistance；
The first pin of optocoupler U2, the second pin of optocoupler U2 are the anode of optocoupler U2 light emitting source, cathode respectively, the of optocoupler U2
Three pins, optocoupler U2 the 4th pin be emitter, collector respectively.
2. the contactless arc ignition circuit according to claim 1 for argon arc welding machine, which is characterized in that
High-frequency arc strike control circuit is according to pulse signal HFc, the actuation of control switch K1 and switch K2；
When switch K1 and switch K2 is attracted, high-frequency arc ignition circuit forms high voltage high frequency bursts, then through striking inductance L1, final coupling
Close welding machine output negative pole OUT-；
When arc welding gun switch is pressed, welding machine output cathode OUT+ is by assisting arc ignition circuit to be coupled to the high-tension pulse of same frequency
Punching, the high voltage high frequency bursts being coupled to welding machine output negative pole OUT- by high-frequency arc ignition circuit, collective effect puncture argon gas, draw
Fire electric arc.
3. the contactless arc ignition circuit according to claim 1 for argon arc welding machine, which is characterized in that the high frequency draws
Arc circuit includes voltage-multiplying circuit, high-frequency arc strike sub-circuit；
The voltage-multiplying circuit, high-frequency arc strike sub-circuit are connected with each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479472.XA CN108340048B (en) | 2017-12-29 | 2017-12-29 | Contactless arc ignition circuit for argon arc welding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479472.XA CN108340048B (en) | 2017-12-29 | 2017-12-29 | Contactless arc ignition circuit for argon arc welding machine |
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| CN108340048A CN108340048A (en) | 2018-07-31 |
| CN108340048B true CN108340048B (en) | 2019-09-27 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604772A (en) * | 2018-12-30 | 2019-04-12 | 上海广为焊接设备有限公司 | A kind of circuit improving inverter argon arc welding machine arcing initiation success rate and stability |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116727808B (en) * | 2023-05-05 | 2024-02-02 | 佛山市三乔焊接实业有限公司 | Arc striking circuit of stud welding machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202129536U (en) * | 2011-05-13 | 2012-02-01 | 杭州恒湖科技有限公司 | Argon-arc-welding arc ignition circuit |
| CN202877694U (en) * | 2012-10-30 | 2013-04-17 | 上海威特力焊接设备制造股份有限公司 | Auxiliary striking arc circuit used for inverter argon arc welding machine |
| CN203245482U (en) * | 2013-02-19 | 2013-10-23 | 广州友田机电设备有限公司 | High-frequency arc starting circuit with direct-current voltage output |
| CN203330562U (en) * | 2013-07-02 | 2013-12-11 | 上海沪工焊接集团股份有限公司 | High-frequency arc starter circuit used for inverter type argon arc welding machine |
| CN205834454U (en) * | 2016-06-28 | 2016-12-28 | 深圳市恒炬晟科技有限公司 | Argon arc welding supercharging arc ignition circuit |
| CN206356705U (en) * | 2016-12-29 | 2017-07-28 | 浙江联洋机电科技有限公司 | A kind of high-frequency and high-voltage arc ignition circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT413953B (en) * | 2003-11-25 | 2006-07-15 | Fronius Int Gmbh | METHOD AND CIRCUIT FOR TOUCH-FREE IGNITION OF A WELDING ARC |
-
2017
- 2017-12-29 CN CN201711479472.XA patent/CN108340048B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202129536U (en) * | 2011-05-13 | 2012-02-01 | 杭州恒湖科技有限公司 | Argon-arc-welding arc ignition circuit |
| CN202877694U (en) * | 2012-10-30 | 2013-04-17 | 上海威特力焊接设备制造股份有限公司 | Auxiliary striking arc circuit used for inverter argon arc welding machine |
| CN203245482U (en) * | 2013-02-19 | 2013-10-23 | 广州友田机电设备有限公司 | High-frequency arc starting circuit with direct-current voltage output |
| CN203330562U (en) * | 2013-07-02 | 2013-12-11 | 上海沪工焊接集团股份有限公司 | High-frequency arc starter circuit used for inverter type argon arc welding machine |
| CN205834454U (en) * | 2016-06-28 | 2016-12-28 | 深圳市恒炬晟科技有限公司 | Argon arc welding supercharging arc ignition circuit |
| CN206356705U (en) * | 2016-12-29 | 2017-07-28 | 浙江联洋机电科技有限公司 | A kind of high-frequency and high-voltage arc ignition circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109604772A (en) * | 2018-12-30 | 2019-04-12 | 上海广为焊接设备有限公司 | A kind of circuit improving inverter argon arc welding machine arcing initiation success rate and stability |
| CN109604772B (en) * | 2018-12-30 | 2020-09-29 | 上海广为焊接设备有限公司 | Circuit for improving arc striking success rate and stability of inverter argon arc welding machine |
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|---|---|
| CN108340048A (en) | 2018-07-31 |
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