CN106735742A - It is a kind of that there are six anti-and good striking performance inverter argon arc welding machines - Google Patents
It is a kind of that there are six anti-and good striking performance inverter argon arc welding machines Download PDFInfo
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- CN106735742A CN106735742A CN201611197879.9A CN201611197879A CN106735742A CN 106735742 A CN106735742 A CN 106735742A CN 201611197879 A CN201611197879 A CN 201611197879A CN 106735742 A CN106735742 A CN 106735742A
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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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
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Abstract
There are six anti-and good striking performance inverter argon arc welding machines the present invention relates to a kind of, the present invention is designed by special machine structure, preferably solves the problems, such as dust-proof, moistureproof, mould proof " six prevent " i.e. waterproof, anti-electric conductivity, anti-corrosion, vibrationproof；By controlling the design of circuit, 100% high-frequency arc strike success rate under the conditions of 10 meters long welding gun welding cables, and the superpower anti-net voltage fluctuation ability that welding machine can still work under 140~27V line voltages are preferably realized；By multinomial anti-jamming circuit or the implementation of measure, the job stability and reliability of welding machine have been ensured.New design makes the performance of welding machine of the present invention be significantly better than the numerous like product of in the market, the characteristic with oneself.The every control of argon arc welding, security performance detection and certification etc. can be met to require；Welding machine of the present invention, due to good performance, thus has more preferable market adaptability, and the circuit of welding machine of the present invention, circuit board and complete machine structure are designed with the unique distinction of oneself.
Description
Technical field
There are six anti-and good striking performance inverter argon arc welding machines the present invention relates to a kind of, belong to inverter type welder technology neck
Domain.
Technical background
At present, contravariant argon arc welding and the competition in the dual-purpose machine product market of manual metal-arc welding are very fierce, are not only embodied in technology
Advanced and advantage on, also depend greatly on the aspects such as the function and design of welding machine.
On domestic and international market, small-sized metal-oxide-semiconductor, the rated current of IGBT pipe contravariant argon arc welding machines are generally in 80 ~ 200A（It is negative
Carry water holdup 100 ~ 15%）Level.Different products, its control circuit theory diagrams, board structure of circuit and complete machine structure design etc.
It is different.The aspects such as performance, reliability, manufacture craft and cost in product, also have larger otherness.It is past very
Many like products, because interference protection measure is few, it is difficult to ensure the reliability of welding machine.Additionally, many welding machines cannot accomplish waterproof, prevent
Electric conductivity is dust-proof, moistureproof, mould proof, anti-corrosion, vibrationproof " six prevent " performance.Furthermore, exactly it is difficult to 10 meters long welding gun welding cables
Under the conditions of 100% high-frequency arc strike, and there is a problem of voltage ripple of power network exceed ± 15% when welding machine cannot normal work.Cause
This, how on the premise of low cost, the good welding machine of exploitation performance has certain technical difficulty.This is also that the present invention needs solution
Problem certainly.
The content of the invention
It is of the invention be provide it is a kind of there are six anti-and good striking performance inverter argon arc welding machines, its good " six
It is anti-" it is waterproof, dust-proof, moistureproof, mould proof anti-electric conductivity, anti-corrosion, vibrationproof ability, it is capable of achieving under the conditions of 10 meters long welding gun welding cables
100% high-frequency arc strike, and voltage ripple of power network exceed ± 20% when, welding machine still can make performance of the invention with normal work
It is significantly better than the numerous like product of in the market, the characteristic with oneself.Due to good control performance, security and can
By property, thus welding machine has more preferable market adaptability.Its good circuit and its structure design are also advantage place of the invention,
It is also to meet important leverage efficiently advanced with inexpensive production, high reliability, manufacturing technology.The circuit of welding machine of the present invention is former
Reason, circuit board and complete machine structure are designed with the unique distinction of oneself.
It is a kind of that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Including casing part, below
Plate part, front-facing portion and control plate part；Casing part includes shell handle and base plate, and rear panel portion point includes rear plastics
Panel, rear plastic front board is provided with power switch, cooling blower, electromagnetic gas valve and its intake interface, power switch control welding machine
The on-off of power supply, cooling fan is located at the rear portion of welding machine, and cold wind is carried out from the air admission hole at welding machine rear portion；Front-facing portion includes
Plastic front panel, is provided with plastic front panel：Positive polarity output snap joint holder assembly, negative polarity output gas-electricity one
Joint, argon arc welding gun switch line socket, small panel and its parameter installed above show and adjust control panel；Described control
Plate part is designed as five pieces, respectively switching power circuit and IGBT inversion controls plate, fast recovery diode rectification output board, master
Control panel, high-frequency arc strike control panel, parameter show and adjust control panel；The IGBT of switching power circuit and IGBT inversion control plates
Adopted with the aluminium radiator of rectification output fast recovery diode and be screwed on plastic insulation division board, plastic insulation division board
Then it is fixed on welding machine base plate, two both sides of radiator are respectively switching power circuit and IGBT inversion controls plate, fast recovery
Diode rectification output board, switching power circuit and IGBT inversion control plates are put into shield box and are cast with colloidal substance, the shield
Box is also secured on welding machine base plate, this part of the invention is constituted an integral part by above-mentioned assembling mode, and it is close to
The cooling fan at rear portion, thus fast recovery diode rectification output board, switching power circuit and IGBT inversion controls plate it
Between constitute air channel.
After the pin of described IGBT is all inserted in using tube leg sheathing, then IGBT is welded on circuit board；Described opens
Powered-down source circuit and IGBT inversion controls plate, master board, parameter show and adjust that control panel is put into respective shield box, and
Cast PGL；Then take brushing exhausted in described fast recovery diode rectification output board and high-frequency arc strike control panel, surface
Edge paint.
A support is designed with the center section of welding machine, is provided with protecting the master board of box above it, in support
Centre, then install inversion main transformer, in the lower section of support, then high-frequency arc strike control panel is installed, they are whole as one
Body, using the screw of support, is screwed on the base plate of welding machine by adopting.
The control circuit of described control plate part mainly includes that inverter main circuit, switching power circuit, IGBT drive electricity
Road, current detecting and rectification transformating circuit, Thermal protection detection and control circuit, given value of current circuit, solenoid valve control circuit, height
Frequency striking arc control circuit, output characteristics control circuit and anti-interference and filter circuit.
Described inverter main circuit by power switch, rectifier bridge, thermistor, IGCT, relay and its control circuit,
Big electrochemical capacitor, IGBT pipes, fast recovery diode and inversion main transformer composition, by positive polarity and negative polarity output output weldering
Connect electric current and voltage；Relay can be connected in power switch, be acted after the certain time-delay time, and its contact closure or short-circuit temperature-sensitive are electric
Resistance and IGCT, the time delay of relay are controlled by it circuit to realize, the charging to big electrochemical capacitor first passes through IGCT
With thermistor branch road, afterwards short circuit IGCT and thermistor again, electricity buffering in realization；Big electrochemical capacitor plays the work of filtering
With.
Described inverter main circuit produces+310V direct currents to supply by switching mode power supply transformer, metal-oxide-semiconductor, pwm pulse width
Modulator, fast diode, integrated regulator, and resistance, electric capacity, the switch power supply of voltage-stabiliser tube composition around them
Road；
IGBT drive circuit includes the resistance, electricity of driving transformer, metal-oxide-semiconductor field effect transistor, voltage-stabiliser tube, diode and their peripheries
Hold；Two IGBT drive for two roads, and the drive circuit form of each part is consistent, the partial circuit, the control letter of input
Number from output characteristics control circuit in pwm pulse width modulated chip output, because pwm pulse width modulated chip is defeated
The signal driving power for going out is small, it is necessary to be amplified by driving power circuit, then by the drive of driving transformer and its periphery
Dynamic circuit goes to control two working conditions of IGBT；The control of pwm pulse width modulated chip output, pwm pulse width modulated
Signal is the signal for determining welding machine inverter main circuit output voltage and size of current, and pwm pulse bandwidth modulation signals are then welded
The given value of current circuit of machine adjusts feedback signal to determine.
Described high-frequency arc strike control circuit by high voltage package, striking transformer, SD, electric capacity, control chip,
The circuit composition of metal-oxide-semiconductor and periphery, striking（Transformer series in the output negative pole loop of inverter main circuit, when weldering weld
During rifle switch closure, can produce control chip and export, the output of control chip can make metal-oxide-semiconductor form batch (-type) break-make, pass through
The boosting of high voltage package, can raise the voltage at electric capacity two ends, can puncture up between SD when voltage is increased to
Air gap, and when forming electric discharge, electric capacity constitutes oscillating circuit with the armature winding of striking transformer, its Resonant High Voltage high frequency for producing
Coupling and again boosting of the signal by striking transformer, are incorporated into secondary loop or the welding circuit of inverter main circuit,
Now the tungsten needle in welding gun is appropriate with the distance between workpiece, and has protective gas to be flowed out from welding gun, realizes argon arc welding
High-frequency arc strike.
Thermal protection is detected and control circuit is made up of many resistance of thermistor, operational amplifier and its periphery, electric capacity,
The form of two operational amplifier parts is consistent, and the radiator peace of IGBT is close in the temperature detection face of two thermistors
Dress, when the temperature of radiator is too high, the output of correspondence operation amplifier circuit can overturn, and export high level signal, lead to
Diode is crossed, protection indicator lamp can on the one hand lighted, close high frequency control, on the other hand, diode current flow, voltage-stabiliser tube can be made
Puncture, voltage stabilizing, its high level signal can make the circuit output low level of operational amplifier part, close pwm pulse width modulated
Chip is exported, and is finally stopped the output of welding machine, realizes overtemperature protection control function.
Described output characteristics controls circuit by the resistance of pwm pulse width modulated chip, operational amplifier and its periphery
（, electric capacity, diode, voltage-stabiliser tube composition, operation amplifier circuit part is typical proportional plus integral control circuit, welding current
Setting signal is input to controlling unit by resistance；From current divider, and the Current Negative Three-Point Capacitance amplified by operational amplifier is believed
Number it is input to controlling unit.
Circuit anti-interference measure on welding machine of the present invention, mainly there is the following aspects：Electricity on welding machine of the present invention
Road interference protection measure, mainly there is the following aspects：1）Input filter interference protection measure.See accompanying drawing 2, input filter circuit is by filtering
Ripple electric capacity Ck1~composition Ck3.Mainly the interference signal from power network is filtered, interference signal is reduced or reduce to this
The adverse effect of invention welding machine control circuit work.2）Output filtering interference protection measure.See accompanying drawing 4, output anti-interference filtration electricity
Route R1 ~ R2 resistance, CC5 electric capacity；R7 ~ R8 resistance, CC4 electric capacity；The groups such as D5 ~ D9 diodes, CC1 ~ CC3 electric capacity, R3 ~ R5 resistance
Into.The series circuit of R1 ~ R2 resistance and CC5 electric capacity（The burr jump signal in current waveform can be reduced）, mainly prevent from doing
Disturb signal corruption（In accompanying drawing 4）D1 ~ D2 fast recovery diodes；The series circuit of R7 ~ R8 resistance and CC4 electric capacity, mainly prevents
Only interference signal is damaged（In accompanying drawing 4）D3 ~ D4 fast recovery diodes；It is connected in parallel on the resistance and electricity at fast recovery diode two ends
Hold the spike interference signal that anti-jamming circuit can be then reduced in fast recovery diode switching process.D8, R5 and CC3 composition
Circuit is that the interference signal for preventing output end damages welding machine control circuit, while it is defeated to being connected to be also prevented from the interference signal of itself
Go out the interference and destruction of the miscellaneous equipment at end；The circuit of D5 ~ D9, R/3 ~ R4 and CC1 ~ CC2 compositions is then further to prevent interference
The destruction of signal butt welding machine job stability, improves the reliability of welding machine.3）The interference protection measure of IC chip.This arranges
Apply, mainly IC2 ~ IC5 power supply over the ground between set filtering or decoupling capacitor, the topmost part seen in accompanying drawing 3.So
Way be mainly and prevent the interference signal from switching power circuit from being exerted an adverse impact to each chip control circuit.4）Weldering
Rifle thread switching control interference protection measure.This measure, mainly first twists two control lines of arc welding gun switch together, afterwards,
Two control lines on a magnet ring around some circles or the number of turns, be finally connected in master board.Such way is main
It is to prevent the interference signal from arc welding gun switch line from being exerted an adverse impact to control circuit.5）The anti-of inversion main transformer output line is done
Disturb measure.This measure, respectively covers a magnet ring mainly on two output lines of inversion main transformer.Such way is main
It is to prevent the interference signal from inversion main transformer output line from being exerted an adverse impact to control circuit.6）Fast recovery diode rectification
The interference protection measure of connecting line between output board and master board.This measure, mainly first twists two control lines together,
Afterwards, two control lines on a magnet ring around some circles or the number of turns.Such way is mainly to be prevented from recovering two from fast
The interference signal of pole pipe rectification output board exerts an adverse impact to main control circuit.7）Switching power circuit and IGBT inversion controls
The interference protection measure of connecting line between making sheet and master board.This measure, mainly first twists five control lines together, it
Afterwards, five control lines on a magnet ring around some circles or the number of turns.Such way is mainly to be prevented from fast Switching Power Supply
The interference signal of circuit and IGBT inversion control plates exerts an adverse impact to main control circuit.Additionally, in terms of structure design,
The measure being also electromagnetically shielded.The part such as inversion of the invention and control circuit constitutes equivalent to by shell, base plate and rear board
Metal shell surround.The effects such as isolation strong electromagnetic, limit electromagnetic radiation can be played.Above-mentioned measure is to ensure present invention electricity
One important prerequisite of the welding machine product functional reliability that road is made.
To different current classes and the welding machine of the present invention of cyclic duration factor requirement, can be by adjustment circuit plate a small amount of zero
Number of components and specifications parameter, form the product of different output rated current and cyclic duration factor, make product seriation.For example,
Change the number of big electrochemical capacitor；Change rectifier bridge parameter；Change the current class and heat sink size of IGBT device；Change fast
The model and parameter of quick-recovery diode；Change specification and parameter of inversion main transformer and output filter reactor etc., you can
Easily form the series of products of different size.Such as 200A/28V, 180A/27.2V, 160A/26.4V, 140A/25.6V, 120A/
The product of many kinds of current classes of 24.8V, 100A/24V, 80A/23.2V and specifications and models.Rated current is smaller, then specified negative
Carry water holdup higher.Certainly, these changes, it is therefore an objective to make the cost of manufacture of product refer to the specifications parameter of corresponding machine and performance
Mark matches.So, the welding machine of every kind of specifications and models could realize the cost control for optimizing.This just improves institute's development
The market competitiveness.
Welding machine of the present invention, due to good control performance, safety and reliability, thus welding machine has more preferable market
Adaptability.Where its good circuit and its structure design are also advantage of the invention, be also meet efficiently and low cost production,
The advanced important leverage of high reliability, manufacturing technology.The circuit theory of welding machine of the present invention, circuit board and complete machine structure are designed with
The unique distinction of oneself.The content of present patent application protection is that the circuit and structure design for protecting this welding machine.
Brief description of the drawings
Accompanying drawing 1 is a kind of structural representation of example welding machine that the present invention is made；
Accompanying drawing 2 is the circuit theory diagrams such as input rectifying, inversion, the Switching Power Supply control of welding machine；
Accompanying drawing 3 is the main control circuit schematic diagram of welding machine；
Accompanying drawing 4 is the circuit theory diagrams such as output rectification, high-frequency coupling and the controlling of sampling of welding machine；
Accompanying drawing 5 is floor portions IGBT inverter circuit PCB components' placement figures；
Accompanying drawing 6 is top layer portion IGBT inverter circuit PCB components' placement figures；
Accompanying drawing 7 is the circuit pcb board components' placement figures such as output rectification, sampling；
Accompanying drawing 8 is high-frequency circuit part pcb board components' placement figure；
Accompanying drawing 9 is the part panels PCB components' placement figures such as to operate and show；
Accompanying drawing 10 is main control circuit pcb board components' placement figure；
Accompanying drawing 11 is the schematic block circuit diagram of welding machine；
The title of each part is as follows in accompanying drawing 1：1st, handle screw；2nd, handle；3rd, shell；4th, fast recovery diode；5th, IGBT pipes；
6th, the anti-interference component of input filter；7th, rectifier or rectifier bridge；8th, radiator A；9th, big electrochemical capacitor；10th, switching power circuit
And IGBT inversion control plates；11st, switching mode power supply transformer；12nd, IGBT driving transformers；13rd, current detecting ring or transformer；
14th, plastic insulation division board；15th, radiator B；16th, fast recovery diode rectification output board；17th, switching power circuit and IGBT
The shield box of inversion control plate；18th, plastics rear board；19th, the power supply line with plug；20th, power switch；21st, electromagnetic gas valve
Component；22nd, base plate；23rd, cooling fan or blower fan；24th, the tube leg sheathing of IGBT pipes；25th, IGBT pipes；26th, fast recovery diode；
27th, radiator C；28th, main transformer output line magnet ring A；29th, main transformer output line magnetic；30th, inversion main transformer or main transformer；31st, support；
32nd, master board shield box；33rd, master board；34th, two connecting lines with magnet ring；35th, five connecting lines with magnet ring；36、
Metal-oxide-semiconductor and its radiator；37th, high voltage package；38th, high-frequency arc strike control panel；39th, parameter shows and adjusts control panel；40th, it is above small
Plate；41st, electric current regulation potentiometer and its knob；42nd, time delay is held one's breath time adjustment potentiometer and its knob；43rd, positive polarity output
Snap joint seat；44th, argon arc welding gun switch line socket；45th, negative polarity output gas-electricity one joint；46th, plastic front panel；
47th, output boosting coupling transformer.
Specific embodiment
It is a kind of structural representation of the IGBT inversions argon arc welding and manual arc welder being made using the present invention shown in accompanying drawing 1.
The structural design drawing main parts size inventory of the charger of the present invention of subordinate list 1.Its chief component includes：
1）Casing part.Including shell 3, handle 2, base plate 22, shell screw etc..
2）Rear board part.The parts installed on rear board mainly have：Power switch 20, band plug power supply line and
Its drawing is not dragged（Or be wire fixer）19th, the portion such as cooling blower 23, electromagnetic gas valve and its intake interface 21, rear plastic front board 18
Point.Power line and plug 19 are connected to power supply grid.Power switch 20 controls the on-off of welding machine electric power.Cooling fan 23 is located at
The rear portion of welding machine, cold wind is carried out from the air admission hole at welding machine rear portion.Some heater members of circuit part or parts can be made, such as
The parts such as IGBT and Heat Sink A heat sink, fast recovery diode and radiator are preferably cooled down.Such air channel and
The type of cooling is designed, and is conducive to ensureing the reliability of welder circuit work, is also that welding machine of the present invention realizes that larger current and height are negative
Carry one of major reason of water holdup.
3）Front-facing portion.The parts installed on welding machine plastic front panel 46 mainly have：Positive polarity exports snap joint
Holder assembly 43, negative polarity output gas-electricity one joint 45, argon arc welding gun switch line socket 44, small panel 40 and its peace above
The parameter of dress shows and adjusts control panel 39.Show and adjust on control panel 39 in parameter, be provided with working power indicator lamp（In vain
Color）, Thermal protection status indicator lamp（Yellow）, argon gas time delay hold one's breath time adjustment potentiometer, output current regulation potentiometer, digital display
Ammeter, and the part such as some electronic components.Two groups of positive and negative polarity output snap joint holder assemblies connect workpiece clamp respectively
Cable and argon arc welding gun cable.Working power indicator lamp indicates power on.Thermal protection status indicator lamp then indicates to overheat shape
Whether state occurs.When internal components temperature is too high, during more than operating temperature, in the presence of circuit is controlled, this on the one hand can be made
Indicator lamp is lighted；On the other hand, welding machine can be made to stop welding or export.In the case where welding machine is not exported, the cooling of blower fan is made
Reduced with the temperature of device can be made.When recovery action temperature is reduced to, welding machine superheating phenomenon is eliminated.Overheating indicator lamp extinguishes.
Meanwhile, welding machine can be welded again.
4）Control plate part.It is designed as five pieces, respectively switching power circuit and IGBT inversion controls plate, two poles of fast recovery
Pipe rectification output board, master board, high-frequency arc strike control panel, parameter show and adjust control panel.Have very on every piece of control panel
Many components and parts.
5）Internal structure part：
After the pin of IGBT 5 and 25 is all inserted in using tube leg sheathing, then it is welded to switching power circuit and IGBT inversion controls
On plate 10.Switching power circuit and IGBT inversion controls plate 10 are put into shield box 17, and pour into a mould PGL；Parameter show and
Regulation control panel 39 is put into its shield box（Note：This shield box is not drawn into accompanying drawing 1）In, and pour into a mould PGL；Master board 33
It is also placed in its master board shield box 32, and pours into a mould PGL.The present invention solves this three pieces of welding machine through the above way
" six prevent " performance issue of control panel.Other two pieces of control panels, i.e. fast recovery diode rectification output board 16 and high-frequency arc strike
Control panel 38, then take the mode of brushing insulated paint to realize that waterproof, anti-electric conductivity be dust-proof, moistureproof, mould proof, corrosion-resistant performance.
These technical measures, can avoid some adsorbing powder dusts containing conductive metal of working site after inverter type welder long-term use to IGBT
Between the pin of electronic device such as pipe, in control board, creep age distance will not be caused to reduce.It is not easy device and control circuit
Failure.Above-mentioned measure, largely improves welding machine functional reliability.
Radiator B 15 is fixed on plastic insulation division board 14.On fast recovery diode rectification output board 16 quick two
The radiating surface held against heat sink B 15 of pole pipe is fixed.IGBT pipes 5 and 25 in inverter main circuit, and fast recovery diode 4
Radiating surface held against heat sink A 8 with 26 is fixed.And the sampling screws of radiator A 8 are fixed on plastic insulation division board 14.
Plastic insulation division board 14 is adopted and is screwed on welding machine base plate 23.The shield box 17 for having poured into a mould PGL is also adopted by screw
It is fixed on welding machine base plate 23.There are switching power circuit and IGBT inversion controls plate 10 in the shield box 17.By above-mentioned assembling, company
Mode is connect, this part of inverter type welder of the present invention is constituted an entirety, see the part in the upper right corner in accompanying drawing 1.Also, it is leaned on
The cooling fan at nearly rear portion.So, just in fast recovery diode rectification output board 16, switching power circuit and IGBT inversion controls
Constituted between plate 10 in " air channel ".Because each radiator is that cooling wind their centre with flute profile, but from fan leads to
Cross, and can in time take away the heat of each radiator.Meanwhile, can also be to the inversion main transformer of rear end from rear end wind out
30th, switching mode power supply transformer 13, HF-O strikings（Boosting）Transformation 47 etc. is cooled down.Further, since being configured with Wind Volume, high speed
（4000~5500rpm/min）Direct cooling blower fan 23, the presence in " air channel " can improve the main power critical parts of heating（Such as
Each IGBT, each fast recovery diode, each radiator, rectifier bridge, inversion main transformer etc.）Cooling effectiveness.Also improve welding machine
Cyclic duration factor during output.If the output current of welding machine is small, cyclic duration factor can be higher, or even can carry out successively
Ground welding.This just preferably solves the problems, such as that weld interval is short.Meanwhile, effectively reduce IGBT or fast recovery diode, inversion
The fault rate of the devices such as transformer or parts.
In the center section of welding machine, a support 31 is designed with.Above it, it is provided with protecting the master board of box 32
33.In the centre of support 31, then inversion main transformer or main transformer 30 are installed.In the lower section of support 31, then high-frequency arc strike is installed
The part of control panel 38.They, using the screw of support 31, the base plate 22 of welding machine are screwed in by adopting as an entirety
On.
Because some takes the measure for strengthening fixed and anti-loosened screw, meanwhile, polylith circuit board all employ
The processing method of the additional encapsulating of box is protected, therefore vibrationproof problem is resolved.
2~accompanying drawing of accompanying drawing 4 and accompanying drawing 11 are the circuit theory diagrams of welding machine of the present invention.5~accompanying drawing of accompanying drawing 10 is weldering of the present invention
The components' placement of machine associated circuit board.Each circuit board control section and other parts or component of welding machine, by one
A little pilots carry out mutual circuit connection.Between each circuit board, between device or parts, according to welding machine of the present invention
Circuit theory diagrams relation（See accompanying drawing 2, accompanying drawing 4 and accompanying drawing 11）Link together.The circuit output control of argon arc welding method can be met
System.
Whole control circuit it is main by upper electric buffer circuit, inverter main circuit, switching power circuit, IGBT drive circuit,
Current detecting and rectification transformating circuit, Thermal protection detection and control circuit, given value of current circuit, solenoid valve control circuit, high frequency
The functional circuit compositions such as arc ignition control circuit, output characteristics control circuit, anti-interference and filter circuit.Come from the function of its circuit
See, mainly complete upper electricity buffering, input rectifying filtering, inversion, output filtering, the generation of each DC supply, pwm pulse
Width adjusting, IGBT pipe drive controls, the output parameter of argon arc welding method（Electric current）Negative feedback control, supply gas, high-frequency arc strike,
Filtering waits work with anti-interference.Finally in the presence of circuit is controlled, argon arc welding is realized, security performance detection is met and is recognized
Card etc. is required.Some explanations are carried out to related functional circuit below：
The operation principle of welding machine other parts functional circuit of the present invention is summarized as follows：As shown in Figure 2.L is connected to N-terminal
The power supplies such as 220V/50Hz.After power switch K connects electric network source, welding machine is powered.White power supply indicator on front panel
（18）Light.From the alternating current that power network comes, by being changed into Rectified alternating current after ZLQ rectifier bridge rectifications.Output after rectification, first passes through
Cross Q5 IGCTs and RT1 thermistor branch roads（Also referred to as go up electric buffer circuit）, afterwards, to the big electrochemical capacitors of EC1 and EC2（470
μ F or 680 μ F/400V etc.）Charged, voltage gradually rises, relatively stable+310V direct currents are eventually become, after output is arrived
Level circuit.
In accompanying drawing 2, JDQA relays can be connected in power switch K, be acted after the certain time-delay time, its contact JDQB closures
Or short circuit RT1 thermistors and Q5 IGCTs.The time delay of JDQA relays is controlled by it circuit to realize.EC1 and EC2
Big electrochemical capacitor（470 μ F or 680 μ F/400V etc.）Charging, first pass through Q5 IGCTs and RT1 thermistor branch roads, Zhi Houzai
Short circuit Q5 IGCTs and RT1 thermistors.Such control circuit is referred to as electric buffer circuit.
That is, JDQA pull up times lag behind power switch K closing the moment.That is JDQA relays
And its contact JDQB is deferred action.When the big electrochemical capacitors of EC1 and EC2（470 μ F or 680 μ F/400V etc.）On charging electricity
After pressure stabilization, the relay is just acted, its contact closure RT1 thermistors, when the normal inversion of welding machine of the present invention is worked, big electricity
Stream is flowed through from the contact of relay.Upper electric buffer circuit is mainly prevents power switch K from connecting moment, due to EC1 and EC2
Big electrochemical capacitor（470 μ F or 680 μ F/400V etc.）Upper no voltage, equivalent to short circuit, can form larger surge current, burn
Bad power switch K.And the effect of upper electric buffer circuit, exactly RT1 thermistors are sealed in by moment of closing a floodgate to limit surge electricity
Stream.Also, the resistance of RT1 thermistors, is to rise with its temperature and increase.Therefore, upper electric buffer circuit can play compared with
Good protective effect.
See accompanying drawing 2 and accompanying drawing 4, inverter main circuit is by power switch K, rectifier bridge ZLQ, RT1 thermistor, JR1 relays
And its control circuit（Triode containing Q1, D4 diodes, ZD2 voltage-stabiliser tubes, resistance R50 and R70 etc.）, upper electric buffer circuit（Containing Q5
IGCT or SCR, Q4 triode, ZD6 voltage-stabiliser tubes, resistance R5 and R9 etc.）, the big electrochemical capacitors of EC1 and EC2（470 μ F or 680 μ F/
400V etc.）, IGBT2 ~ IGBT3 pipe, fast recovery diode（In accompanying drawing 2）D1 and D2, T3 or HGQ current detectings ring or transformer,
Inversion main transformer ZB,（In accompanying drawing 4）D1 ~ D4 fast recovery diodes etc. are constituted.By OUT（+）Positive polarity and OUT（-）Negative pole
Property output end output welding current and voltage.
The big electrochemical capacitors of EC1 and EC2（470 μ F or 680 μ F/400V etc.）Play a part of filtering.The side of+310V direct currents one
Face supplies inverter main circuit.Its function is mainly：High voltage direct current is converted to intermediate frequency（Tens KHz）Alternating current.ZB inversion transformations
Device realizes the conversion of voltage step-down and High-current output.Fast recovery diode is then the midfrequent AC that contravariant transformer is exported
Electricity is transformed to direct current.On the other hand, accompanying drawing 2 is seen ,+310V direct currents are supplied by T1（Containing T1A and T1B）Switching Power Supply transformation
Device, Q2 metal-oxide-semiconductors, U1（3843）The fast diode such as pwm pulse width modulator, D21 ~ 23, D5 ~ 7, D17, D3, U2
（7912）, 2Q2 in accompanying drawing 3（7815）Integrated regulator, and resistance, electric capacity, voltage-stabiliser tube Z2, Z3 and ZD10 around them
Deng the switching power circuit of device composition, -15V ,+12V ,+28V are produced（HF interfaces are exported to CN1 the and CN2 high frequencies in accompanying drawing 3
Arc ignition control circuit part）, -12V ,+15V supply voltages.The live line works such as the corresponding control circuit of supply.For Switching Power Supply
Circuit part, due to Q2 metal-oxide-semiconductors and the armature winding of T1A switching mode power supply transformers, U1（3843）Pwm pulse width modulated
Device, and the composition such as voltage-stabiliser tube around them, diode, many resistance and electric capacity circuit, be belonging to+310V high tension loops
's.To ensure the safety of control circuit, in fig 2, U5 is employed（817）Photoelectrical coupler is isolated.Switching Power Supply
The kernel control chip of PWM control platelets is U1, i.e. 3843 pwm pulse width adjustors.Its peripheral resistance, electric capacity can set
The relevant parameter of fixed its work.As to how determining, it is necessary to check UC3843（Or TL3843）Data used in connection with or explanation.
It is not repeated herein.In a word, the pulse of U1 outputs is the driving pulse of certain working frequency, can make the Q2 metal-oxide-semiconductors in accompanying drawing 2
In break-make working condition.In the output circuit part of T1, -15V ,+28V ,+12V, -12V ,+24V ,+15V are obtained respectively（It is attached
The output of 2Q2 voltage-stablizers in Fig. 3）Supply voltage.The different device of supply and circuit are used.For example ,+24V passes through FAN1 plugs
Supply fan work；+ 12V and -12V power supply voltage supplying opamp control circuits etc..On this part of Switching Power Supply
Operation principle, above section is to have carried out simple illustration.The detailed working condition of this circuit part is understood if desired, is related to
And to many knowledge of Switching Power Supply.The on-off circuit books or data that reader can inquire about correlation make further understanding.Here
No longer describe in detail.
The control circuit of switching power supply parts of the invention, with following features：In the input power supply voltage of welding machine
140V is reduced to by rated value 220V, or during up to 270V, switching power circuit still can produce the output voltage of stabilization.This is just
Ensure that welding machine in the still solderable work of 140~270V supply voltages.That is, welding machine of the present invention has stronger anti-power network
Voltage pulsation ability.
From the circuit and principle of above-mentioned switching power supply parts, the present invention is without using general control transformer and phase
The voltage conversion circuit of pass produces above-mentioned 6 supply voltages.Its circuit power taking is from+the 310V in major loop.Switch transformation
The volume and size of device, general control transformer is significantly less weight than, this just reduces the cost of welding machine of the present invention, improves welding machine
Technical value added.
See accompanying drawing 2, the driving circuit section of IGBT is by T2 driving transformers（Containing T2A, T2B, T2C winding）、Q7~Q8 MOS
Resistance, electric capacity of FET, Z4 and ZD4 ~ ZD5 voltage-stabiliser tubes, D13 ~ D14 diodes, and their peripheries etc. are constituted.2
IGBT, 2 roads drive, and the drive circuit form of each part is consistent.The partial circuit, the control signal CN9-5 of input comes
Circuit is controlled from output characteristics（See accompanying drawing 3）In IC1 pwm pulse width modulated chips 6 pin output ends.Due to IC1 chips
The signal driving power of output is small, therefore needs to be amplified by driving power circuit, then by T2 driving transformers and its outward
The drive circuit for enclosing goes to control 2 working conditions of IGBT.IC1 pulse width modulations（PWM）Chip output control signal be
One prescription wave pulse signal.The frequency of square-wave pulse signal, is one of important parameter of guarantee IGBT switchs.It is to pass through
The peripheral components parameter setting of IC1 chips and determine.As to how determining, it is necessary to check data used in connection with or explanation.This
In be not repeated.Need exist for explanation be：Pwm pulse bandwidth modulation signals be determine welding machine inverter main circuit output voltage and
The signal of size of current.And pwm pulse bandwidth modulation signals are then by electric current regulation Setting signal Ug and the Current Negative Three-Point Capacitance of welding machine
Signal Ufi is determined.
Accompanying drawing 2 and accompanying drawing 3 are seen, by HGQ（Or T3）The signal that current detecting ring or transformer are detected, by accompanying drawing 3
CN5 interfaces, input is to following stage circuit.The groups such as electric routing resistance R5~R10, diode D1 and D82, the electric capacity C8~C9
Into.Once there is bus over-current phenomenon avoidance, the signal can close the output of IC1 PWM chips.Eventually through CN9 interfaces, control attached
The work of drive circuit Q7 metal-oxide-semiconductors in Fig. 2, closes drive signal and stops the output of welding machine inverter main circuit, realizes that excessively stream is protected
Shield.
RF current dividers in accompanying drawing 4, the output current for detecting welding machine.By J4 interfaces, it is connected in accompanying drawing 3
CN8 interfaces.Because the signal of current divider detection is millivolt level, therefore, the circuit being made up of the IC2 operational amplifiers of rear class
Signal amplification is carried out, as output current negative-feedback signal Ufi.Be connected to output characteristics control circuit in R43 resistance it is defeated
Enter end.
See accompanying drawing 3, the 1RP3 on welding machine front panel export welding current regulation potentiometer by interface be connected to electric current to
Determine circuit.Main resistance by RP1~RP3 potentiometers, IC4A operational amplifiers and its periphery of the circuit etc. is constituted.By electric current
Given circuit, electric current regulation Setting signal Ug is obtained by the output end of the output end of operational amplifier IC4A, i.e. R44.Electric current school
Positive potential device is RP1 and RP3, the minimum and maximum electric current of recoverable welding machine output.By the cooperation with given potentiometer, correction
The output current of welding machine can be made to meet the requirement of curent change scope in nameplate afterwards.The signal of RP2 outputs can then connect welding machine
Display control circuit part.The main digital tube current by 1U2 microprocessors or single-chip microcomputer and its right in the part shows table, also
It is made up of many resistance of their peripheries, electric capacity and triode etc..Power supply+5V the power supplys of the part, are to pass through 1U3 by+12V
（7805）Voltage regulator circuit is produced.The circuit system being made up of 1U2 microprocessors, is capable of achieving the number of welding machine output current
Word shows.
See accompanying drawing 3, CN3 is connected to the control line of TIG argon arc welding guns switch.After arc welding gun switch is closed, in optocoupler IC7
LED lighting, the triode ON of its output stage.+ 12V is input into 11 pin of IC5.
First, by the conducting of triode Q3, control electromagnetic gas valve control circuit is removed.Electromagnetic gas valve is connected to CN4 interfaces.
Electromagnetic gas valve control circuit is made up of the device of IC4B and IC4C operational amplifiers and its periphery.1RP2 is that time delay is held one's breath on panel
Time adjustment potentiometer, it constitutes RC delay circuits with EC7 electric capacity.The conducting of triode Q3 can make 8 pin of IC4C export low electricity
Flat, voltage-stabiliser tube Z5 punctures, triode Q4 conductings, is then connected to the electromagnetic gas valve action of CN4 interfaces.Make protective gas argon gas
（Ar）Welding gun is flowed into, the protection to weld zone is realized.
Secondly, D13 diodes cut-off；The 6 pin output high level of IC5, the 12 pin output low level of IC5.Two in optocoupler IC8
Pole tube light-emitting, the triode ON of its output stage.Puncture voltage-stabiliser tube Z1, voltage stabilizing, triode Q5 conducting.So that the height of rear class
Frequency striking arc circuit works.
See accompanying drawing 3 and accompanying drawing 4, high-frequency arc strike controls circuit by 2T1 high voltage packages, HF-O strikings（Boosting）Transformer, spark
Discharger FD, electric capacity 2C9~2C11,3Q4 metal-oxide-semiconductor, 2IC2 chips, metal-oxide-semiconductor 2Q1, and a lot of devices of periphery are constituted.OUT
（+）And OUT（-）It is the positive and negative output end of welding machine.HF-O strikings（Boosting）Output negative pole of the transformer series in inverter main circuit
In property loop.When TIG weldering arc welding gun switch is closed, as mentioned above, triode Q5 conductings can produce 2IC2 chips defeated
Go out.The output of 2IC2 chips can make metal-oxide-semiconductor 2Q1 form batch (-type) break-make.By the boosting of 2T1 high voltage packages, electric capacity can be made
The voltage at 2C9~2C11 two ends is raised.When voltage is increased to the air gap that can puncture up between SD FD, and form electric discharge
When, electric capacity 2C9~2C11 and HF-O strikings（Boosting）The armature winding of transformer constitutes oscillating circuit, its Resonant High Voltage for producing
High-frequency signal is by HF-O strikings（Boosting）The coupling of transformer and again boosting, the secondary for being incorporated into inverter main circuit are returned
Road or welding circuit.Because the tungsten needle in now welding gun is appropriate with the distance between workpiece, and there is Ar（Argon gas）Protective gas
Flowed out from welding gun, therefore the high-frequency arc strike of argon arc welding can be realized, be i.e. air gap between tungsten needle and workpiece is vibrated by high-frequency and high-voltage
Signal punctures, and finally ignite electric arc, in the presence of other control circuits, finally forms electricity according to the size of given welding current
Arc current.Normal argon arc welding operation is can be carried out afterwards.
Due to there is output current to produce, therefore（In accompanying drawing 4）Current divider RF detects signal.The signal is by accompanying drawing 2
IC2 amplifying circuits after, have current signal in the input of R48 resistance, can make IC3B operational amplifiers export high level.Can make
D3 is turned on, LED lighting in IC6 optocouplers, its output stage triode ON, then the cut-off of Q5 triodes.2IC2 chips stop defeated
Go out control signal, the high-frequency arc ignition circuit of rear class stops producing high-frequency arc strike pulse.That is, into after normal weld, it is high
Frequency striking arc signal is automatically stopped generation.Unless after welding arc current interruption, can just repeat above-mentioned control process.
Argon arc welding gun switch is pressed, if without striking success, i.e., welding machine does not produce output high current.Then D8 and D3
It is not turned on or ends.By the starting the arc abnormal circuit in accompanying drawing 3（Containing IC5, resistance R53~R54, electric capacity C16 etc.）Work
After several seconds of, time delay, the 4 pin output high level of IC5, D15 conductings.Protection indicator lamp 1LED1 on welding machine front panel is lighted,
LED lighting in IC6 optocouplers, its output stage triode ON, then Q5 triodes cut-off.2IC2 chips stop output control
Signal, the high-frequency arc ignition circuit of rear class stops producing high-frequency arc strike pulse.
On the other hand, the high level of the 4 pin output of IC5, by D15（Conducting）, D7 diode current flows, voltage-stabiliser tube Z3 can be made
Puncture, voltage stabilizing, its high level signal can make the circuit output low level of IC4D operational amplifiers part, can then close IC1 cores
The pwm signal output of piece.It is finally stopped the output of welding machine.
High-frequency arc strike of the invention controls circuit, with following features：The higher-order of oscillation striking of high voltage can be produced to believe
Number.Even under the gap condition in 10 meters long welding gun welding cables and between normal electrode and workpiece, still can realize
100% high-frequency arc strike success rate.This performance is substantially better than the striking performance of the numerous like product of in the market.
See accompanying drawing 3, Thermal protection detection and control circuit by RM1 and RM2 thermistors, operational amplifier IC3C and IC3D and
Many resistance, electric capacity of its periphery etc. are constituted.The form of two operational amplifier parts is consistent.RM1 and RM2 two is installed
During thermistor, the radiator for allowing its temperature detection face to be close to IGBT is installed.When the temperature of radiator is too high, correspondence computing
The output of amplifier circuit can overturn, and export high level signal.By diode D4 or D5,1LED1 can on the one hand protected
Shield indicator lamp is lighted, and closes high frequency control etc..On the other hand, part like above, can make D7 diode current flows, voltage-stabiliser tube Z3
Puncture, voltage stabilizing, its high level signal can make the circuit output low level of IC4D operational amplifiers part, close the PWM of IC1 chips
Signal output.It is finally stopped the output of welding machine.Realize overtemperature protection control function.In the presence of cooling blower, when overheat is existing
During as eliminating, control circuit can just continue to output pwm control signal.While overheating indicator lamp（Yellow）Extinguish.
See accompanying drawing 3, output characteristics control circuit by IC1 pwm pulse width modulateds chip, IC4D operational amplifiers and its
The resistance of periphery（R22、R24）, electric capacity（C13 and C14）, diode D6, voltage-stabiliser tube Z4 devices composition.IC4D operational amplifiers
Circuit part is typical proportional integral（PI）Control circuit.Already discussed above, welding current Setting signal Ug is by electricity
Resistance R44 is input to PI controlling units；From current divider, and the current negative feedback signal Ufi resistance R45 amplified by IC2 is input into
To PI controlling units.
The control process of welding machine argon arc welding output characteristics of the present invention is summarized as follows：
The switch K of welding machine rear board closes after connecting the power supply extremely short time（During this, welder circuit carries out electricity buffering
Control, there is certain delays time to control）, the above-mentioned each control panel live line work inside welding machine.White power supply instruction on front panel
1LED2 lamps are bright, indicate welding machine powered.
After the necessary devices such as the welding gun needed for connecting argon arc welding, protective gas, you can start welding operation.First,
Make to keep appropriately distance between welding gun tungsten needle and workpiece, typically several millimeters.After arc welding gun switch is pressed, in control circuit
Under effect, electromagnetic gas valve DF actions convey protective gas to weld zone.Meanwhile, the IC1 pwm pulse width control systems in accompanying drawing 3
Circuit produces the larger pulse signal of a dutycycle, makes the drive circuit works of IGBT, finally exports inverter main circuit empty
Carry voltage.Afterwards, in the presence of high-frequency arc strike control circuit, the contactless striking of high frequency is realized.The output current of welding machine, by
The given potentiometer signal Ug of welding current is determined on the front panel that operator regulates.It is detectable by current divider RF during welding
To the output current signal of inverter main circuit, by IC2 operation amplifier circuit enhanced processings, current negative feedback signal is formed
Ufi.Current negative feedback signal Ufi, can be compared with welding current Setting signal Ug.Difference signal after comparing, passes through
The output characteristics control circuit of IC4D parts, carries out PI in accompanying drawing 3（Ratio and integration）Regulation control.The output control of its output
Pulse width or the dutycycle output of IC1 PWM chips.By the drive circuit of IGBT, IGBT's is logical in control inverter main circuit
Disconnected time, the final size for determining welding machine output current and voltage realizes the accurate control of output current parameter.And make welding machine
Output characteristics is the dropping characteristic of constant current.Further say, when welding current Setting signal Ug is constant, as welder circuit is examined
The negative-feedback Ufi current signals that measure increase, also, after reaching given setting value, the given Ug signals of welding current and Ufi electricity
The difference for flowing negative feedback control signal can increase and reduce with electric current, and IC1 PWM chips are exported by after PI controls, making welding machine
Pulse width or dutycycle reduce, the output voltage reduction of welding machine.This process, that is, so-called Current cut-off negative feedback control
System.The feedback control for only just being worked after electric current reaches the setting value of welding current potentiometer.When welding current is given
During signal intensity, Current cut-off negative feedback setting value is different, but other control process are similar.So, set in potentiometer
Between fixed minimum and maximum, so that it may obtain without several negative characteristic curves.If unclamping arc welding gun switch to prepare not welded
When, welding machine can be made to close output.Simultaneously as the time-lag action of 1RP2, EC7, DF magnetic valves can stop dynamic delayed some times
Make, which achieves the delayed control of holding one's breath of argon arc welding.Control process above, is also to meet substantially for argon arc welding welding
Ask.
Circuit anti-interference measure on welding machine of the present invention, mainly there is the following aspects：
1）Input filter interference protection measure.See accompanying drawing 2, input filter circuit is by filter capacitor Ck1~constitute Ck3.It is mainly right
Interference signal from power network is filtered, and reduces or reduce unfavorable shadow of the interference signal to welding machine of the present invention control circuit work
Ring.
2）Output filtering interference protection measure.See accompanying drawing 4, output anti-interference filtration circuit is by R1 ~ R2 resistance, CC5 electric capacity；R7
~ R8 resistance, CC4 electric capacity；D5 ~ D9 diodes, CC1 ~ CC3 electric capacity, R3 ~ R5 resistance etc. are constituted.R1 ~ R2 resistance and CC5 electric capacity
Series circuit（The burr jump signal in current waveform can be reduced）, mainly prevent interference signal from damaging（In accompanying drawing 4）D1~D2
Fast recovery diode；The series circuit of R7 ~ R8 resistance and CC4 electric capacity, mainly prevents interference signal from damaging（In accompanying drawing 4）D3
~ D4 fast recovery diodes；The resistance and electric capacity anti-jamming circuit for being connected in parallel on fast recovery diode two ends can then be reduced soon
Spike interference signal during quick-recovery diode rectification.The circuit of D8, R5 and CC3 composition is that the interference for preventing output end is believed
Number damage welding machine control circuit, while being also prevented from the interference signal of itself to being connected to the interference of the miscellaneous equipment of output end and broken
It is bad；The circuit of D5 ~ D9, R/3 ~ R4 and CC1 ~ CC2 compositions is then further to prevent breaking for interference signal butt welding machine job stability
It is bad, improve the reliability of welding machine.
3）The interference protection measure of IC chip.This measure, mainly IC2 ~ IC5 power supply over the ground between set
Filtering or decoupling capacitor, the topmost part seen in accompanying drawing 3.Such way is mainly prevents dry from switching power circuit
Signal is disturbed to exert an adverse impact each chip control circuit.
4）Arc welding gun switch control line interference protection measure.This measure, mainly first twists two control lines of arc welding gun switch
Together, afterwards, two control lines on a magnet ring around some circles or the number of turns, be finally connected to master board CN3's
On socket.Such way is mainly prevents the interference signal from arc welding gun switch line from being exerted an adverse impact to control circuit.
5）The interference protection measure of inversion main transformer output line.This measure, mainly in two outputs of inversion main transformer
A magnet ring is respectively covered on line.Such way is mainly prevents the interference signal from inversion main transformer output line from being produced to control circuit
The bad influence of life.
6）The interference protection measure of connecting line between fast recovery diode rectification output board and master board.This measure, it is main
If two control lines are first twisted together, afterwards, two control lines on a magnet ring around some circles or the number of turns.It is such
Way is mainly prevents the interference signal from fast recovery diode rectification output board from being exerted an adverse impact to main control circuit.
7）The interference protection measure of connecting line between switching power circuit and IGBT inversion controls plate and master board.This arranges
Apply, mainly five control lines first twisted together, afterwards, five control lines on a magnet ring around some circles or the number of turns.
Such way is mainly prevents the interference signal from fast switching power circuit and IGBT inversion control plates to main control circuit
Exert an adverse impact.
Additionally, in terms of structure design, the measure being also electromagnetically shielded.The part phase such as inversion of the invention and control circuit
Surrounded when in the metal shell constituted by shell, base plate and rear board.Isolation strong electromagnetic, limit electromagnetic radiation etc. can be played
Effect.
Above-mentioned measure is an important prerequisite for ensureing the welding machine product functional reliability that circuit of the present invention is made.
Above is the brief control process explanation of each circuit part of welding machine of the present invention and argon arc welding method.Due to this hair
The bright detailed circuit schematic diagram for having been presented for accompanying drawing 2 and accompanying drawing 4, therefore, for there is circuit reading ability（Or possess mutually powered-down
Road knowledge）People for, can understand completely.Circuit diagram is exactly a kind of noiseless language.But, read for no circuit
Reading ability（Or do not possess interlock circuit knowledge）People for, even if explain it is many again, they are also elusive.In view of a piece
The relation of width, can only illustrate main part herein, so that reader better understood when the operation principle and process of correlation.
Visible by described above, circuit of the present invention has the mentality of designing and method of oneself uniqueness.Welding machine can not only be realized
The controls such as argon arc welding method output, and, the designed complete machine structure for controlling circuit and welding machine is all to produce welding machine of the present invention
Product meet security credential requirement, are also that to meet product high where basic reason with technical advantages such as good control performances
Effect and inexpensive production, high reliability, the important leverage of manufacturing process technology advance.The content of present patent application protection
It is that the structure design for protecting this welding machine.
Additionally, connecting simple between circuit board of the invention, device is much using automatic placement machine and inserts on circuit board
Part machine completes processing, and its production process and production technology are greatly simplified, reduces product weight, production and transportation cost.
Above content is to combine specific machine structure and circuit board and control function detailed description made for the present invention,
It cannot be assumed that specific implementation of the invention is only limited to these explanations.Others skilled in the art to technical field of the present invention come
Say, without departing from the inventive concept of the premise, can also make some other deductions and conversion, these should all be considered as category
In the category of present invention protection.
Claims (10)
- It is 1. a kind of that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Including casing part, rear board Partly, front-facing portion and control plate part；Casing part includes shell handle and base plate, and rear panel portion point includes rear plastic cover Plate, rear plastic front board is provided with power switch, cooling blower, electromagnetic gas valve and its intake interface, power switch control welding machine electricity The on-off in source, cooling fan is located at the rear portion of welding machine, and cold wind is carried out from the air admission hole at welding machine rear portion；Front-facing portion includes modeling Material front panel, is provided with plastic front panel：Positive polarity output snap joint holder assembly, negative polarity output gas-electricity one connect Head, argon arc welding gun switch line socket, small panel and its parameter installed above show and adjust control panel；Described control panel Part is designed as five pieces, respectively switching power circuit and IGBT inversion controls plate, fast recovery diode rectification output board, master control Making sheet, high-frequency arc strike control panel, parameter show and adjust control panel；The IGBT of switching power circuit and IGBT inversion control plates and The aluminium radiator of rectification output fast recovery diode is adopted and is screwed on plastic insulation division board, and plastic insulation division board is then It is fixed on welding machine base plate, two both sides of radiator are respectively switching power circuit and IGBT inversion controls plate, recover two soon Pole pipe rectification output board, switching power circuit and IGBT inversion control plates are put into shield box and are cast with colloidal substance, the shield box It is also secured on welding machine base plate, this part of the invention is constituted an integral part by above-mentioned assembling mode, it is after The cooling fan in portion, thus between fast recovery diode rectification output board, switching power circuit and IGBT inversion control plates Constitute air channel.
- It is 2. a kind of as claimed in claim 1 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Institute After the pin of the IGBT for stating all is inserted in using tube leg sheathing, then IGBT is welded on circuit board；Described switching power circuit And IGBT inversion controls plate, master board, parameter show and adjust that control panel is put into respective shield box, and pour into a mould epoxy filling Envelope material；Described fast recovery diode rectification output board and high-frequency arc strike control panel, brushing insulated paint is then taken on surface.
- It is 3. a kind of as claimed in claim 2 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that： The center section of welding machine is designed with a support, is provided with protecting the master board of box above it, in the centre of support, then pacifies Dress inversion main transformer, in the lower section of support, then high-frequency arc strike control panel is installed, they as an entirety, using support Screw, be screwed on the base plate of welding machine by adopting.
- It is 4. a kind of as claimed in claim 1 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Institute The control circuit of the control plate part stated mainly includes inverter main circuit, switching power circuit, IGBT drive circuit, current detecting Controlled with rectification transformating circuit, Thermal protection detection and control circuit, given value of current circuit, solenoid valve control circuit, high-frequency arc strike Circuit, output characteristics control circuit and anti-interference and filter circuit.
- It is 5. a kind of as claimed in claim 4 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Institute The inverter main circuit stated is by power switch, rectifier bridge, thermistor, IGCT, relay and its control circuit, big electrolysis electricity Hold, IGBT pipe, fast recovery diode and inversion main transformer composition, by positive polarity and negative polarity output output welding current and Voltage；Relay can be connected in power switch, be acted after the certain time-delay time, its contact closure or short-circuit thermistor and brilliant lock Pipe, the time delay of relay is controlled by it circuit to realize, the charging to big electrochemical capacitor, first passes through IGCT and temperature-sensitive electricity Resistance branch road, short circuit IGCT and thermistor again, electric realizations in buffer afterwards；Big electrochemical capacitor plays a part of filtering.
- It is 6. a kind of as claimed in claim 5 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Institute The inverter main circuit stated produces the supply of+310V direct currents by switching mode power supply transformer, metal-oxide-semiconductor, pwm pulse width modulator, fast Fast diode, integrated regulator, and resistance, electric capacity, the switching power circuit of voltage-stabiliser tube composition around them.
- It is 7. a kind of as claimed in claim 4 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that： IGBT drive circuit includes the resistance, electric capacity of driving transformer, metal-oxide-semiconductor field effect transistor, voltage-stabiliser tube, diode and their peripheries； Two IGBT drive for two roads, and the drive circuit form of each part is consistent, the partial circuit, and the control signal of input is come The output of the pwm pulse width modulated chip from output characteristics control circuit, due to the output of pwm pulse width modulated chip Signal driving power is small, it is necessary to be amplified by driving power circuit, then passes through the driving electricity of driving transformer and its periphery Road is gone to control two working conditions of IGBT；The control of pwm pulse width modulated chip output, pwm pulse bandwidth modulation signals It is the signal for determining welding machine inverter main circuit output voltage and size of current, and pwm pulse bandwidth modulation signals are then by welding machine Given value of current circuit adjusts feedback signal to determine.
- It is 8. a kind of as claimed in claim 4 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Institute The high-frequency arc strike control circuit stated is by high voltage package, striking transformer, SD, electric capacity, control chip, metal-oxide-semiconductor and outer Enclose circuit composition, striking transformer series in the output negative pole loop of inverter main circuit, when weld arc welding gun switch close when, Can produce control chip to export, the output of control chip can make metal-oxide-semiconductor form batch (-type) break-make, make by the boosting of high voltage package With, can raise the voltage at electric capacity two ends, when voltage is increased to the air gap that can puncture up between SD, and form electric discharge When, electric capacity constitutes oscillating circuit with the armature winding of striking transformer, and the Resonant High Voltage high-frequency signal that it is produced becomes by striking The coupling of depressor and again boosting, are incorporated into secondary loop or the welding circuit of inverter main circuit, now the tungsten in welding gun Pin is appropriate with the distance between workpiece, and has protective gas to be flowed out from welding gun, realizes the high-frequency arc strike of argon arc welding.
- It is 9. a kind of as claimed in claim 4 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that：Heat Protection detection and control circuit are made up of many resistance of thermistor, operational amplifier and its periphery, electric capacity, and two computings are put The form of big device part is consistent, and the radiator installation of IGBT is close in the temperature detection face of two thermistors, works as radiator Temperature it is too high when, correspondence operation amplifier circuit output can overturn, export high level signal, by diode, one Aspect can light protection indicator lamp, close high frequency control, on the other hand, can make diode current flow, and voltage-stabiliser tube punctures, voltage stabilizing, Its high level signal can make the circuit output low level of operational amplifier part, close the output of pwm pulse width modulated chip, most Stop the output of welding machine eventually, realize overtemperature protection control function.
- It is 10. a kind of as claimed in claim 4 that there are six anti-and good striking performance inverter argon arc welding machines, it is characterised in that： Described output characteristics controls circuit by the resistance of pwm pulse width modulated chip, operational amplifier and its periphery（, electric capacity, two Pole pipe, voltage-stabiliser tube composition, operation amplifier circuit part is typical proportional plus integral control circuit, and welding current Setting signal is led to Cross resistance and be input to controlling unit；From current divider, and control is input to by the current negative feedback signal that operational amplifier amplifies Link processed.
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| CN201611197879.9A CN106735742B (en) | 2016-12-22 | 2016-12-22 | It is a kind of that there are six anti-and good striking performance inverter argon arc welding machines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719523A (en) * | 2020-09-11 | 2021-04-30 | 上海宗镕电器有限公司 | Complete machine circuit principle of three-phase 380V power supply manual arc inverter welding machine |
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| JPS5870973A (en) * | 1981-10-23 | 1983-04-27 | Mitsubishi Electric Corp | Consumable electrode type arc welding machine |
| CN201168848Y (en) * | 2008-03-22 | 2008-12-24 | 太原市星云焊接设备有限公司 | Multifunctional full-digitalized contravariant welding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719523A (en) * | 2020-09-11 | 2021-04-30 | 上海宗镕电器有限公司 | Complete machine circuit principle of three-phase 380V power supply manual arc inverter welding machine |
| CN112719523B (en) * | 2020-09-11 | 2023-03-10 | 上海宗镕电器有限公司 | Complete machine circuit principle of three-phase 380V power supply manual arc inverter welding machine |
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| CN106735742B (en) | 2018-05-25 |
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