CN2138001Y - Multifunctional silicon controlled inverter arc welder - Google Patents

Multifunctional silicon controlled inverter arc welder Download PDF

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Publication number
CN2138001Y
CN2138001Y CN 92232242 CN92232242U CN2138001Y CN 2138001 Y CN2138001 Y CN 2138001Y CN 92232242 CN92232242 CN 92232242 CN 92232242 U CN92232242 U CN 92232242U CN 2138001 Y CN2138001 Y CN 2138001Y
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circuit
voltage
functional
welding
control circuit
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张义
白志范
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Jilin University of Technology
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Jilin University of Technology
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Abstract

The utility model relates to a multi-functional silicon controlled rectifier contravariant arc-welding device adopts closed-loop control system, the operating frequency of control dc-to-ac converter, the requirement of adaptation standard setting value.
The device is composed of: CO 22Gas cylinder, CO2The device comprises a pressure-reducing flow regulator, an air feed pipe, a power line, a control circuit, a cable, an air outlet pipe, a wire feeder, a welding gun, a switch K and the like.
The control circuit comprises: the arc welding device comprises a main circuit, a no-load voltage establishing and voltage-frequency converting circuit, a plurality of external characteristic obtaining circuits, a frequency dividing and trigger pulse output circuit, a positive and negative detection and delay circuit, a pulse generating and standard setting circuit, a TIG/MIG welding control circuit, a wire feeding speed regulating circuit, a time sequence control circuit, a control power supply circuit and the like, which form the silicon controlled inverter arc welding device with a plurality of welding functions.

Description

Multifunctional sillicon controlled converting arc welder
The utility model relates to a kind of arc welder that is used for, particularly a kind of multi-functional thyristor inversion arc welding equipment.
Existing thyristor inversion arc-welding machine, its power supply, do not possess drop characteristic and flat characteristic simultaneously, when its reason is to be afraid of that welding machine is in flat characteristic output, misapply in manual metal-arc welding or TIG soldering method and weld, this moment, generator characteristic was a flat characteristic, will cause short circuit current excessive, power supply burns, and welding machine damages.So all be single function mostly, as ZX7-400S manual arc welder, the NBC-400 in Chengdu, CO 2Welding machine, NBM-400 type, MIG welding machine.From retrieving the domestic as can be known multi-functional inverter arc welding machine that do not have.And for example U.S. POWCON-200SMT is three functions.Also just like the LHH-400 of Sweden, but S, TIG, MIG/MAGCO are arranged all 2, but the back a kind of be not flat characteristic, but permanent power curve, (band dams), and be waveform controlling method.Manufacturing, debugging are all very difficult, and cost is also very expensive.
Task of the present utility model is to provide a kind of improved, particularly a kind of thyristor inversion arc welding equipment of multi-functional, best welding characteristic.It can be suitable for various occasions and the various metal material that welds such as structural steel, copper, aluminium, stainless steel etc. easily.A kind of gas metal-arc welding holding circuit with flat characteristic output is provided simultaneously, solve since welding method not to the time cause device damage.Multi-functional welder one, performance the best that is is provided.
Task of the present utility model is finished by following manner:
Adopt control circuit, the operating frequency of control inverter promptly adds external characteristic control circuit, obtains needed external characteristics.
Weld control circuit, improve welding procedure by main circuit, back-pressure detection and delay circuit, floating voltage foundation and voltage-frequency conversion, frequency division detection and trigger impulse output, sampling control, external characteristics acquisition, wire feed speed governing, pulse generation and standard setting, SECO, TIG/MIG, by measures such as K switch control methods, thereby make this device have following characteristic:
(1) linear fall volt-ampere characteristic, (2) constant-current characteristics, (3) constant voltage external characteristics, characteristic etc. is dragged in (4) constant current outward.
Being suitable for the multi-functional of multiple welding method by above various different qualities, this invention is the comprehensive inversion welder of one.
(1). direct current manual metal-arc welding (D.C.STICK).
(2). DC pulse manual metal-arc welding (D.C.STICK/P.).
(3). direct current argon tungsten-arc welding (D.C.TIG).
(4). DC pulse argon tungsten-arc welding (D.C.TIG/P.).
(5). direct current metal argon arc welding (D.C.MIG/MAG).
(6). DC pulse metal argon arc welding (D.C.MIG/MAG-P.)
(7) .CO 2Gas shielded arc welding.
Solved the problem that never solves in the welding field, i.e. this invention has solved when adopting flat characteristic, and the misconnection manual metal-arc welding makes power supply cause the overload problem, the present invention has adopted holding circuit, when power supply switches in the flat characteristic shelves, guaranteed that floating voltage is zero, has only the MIG/MAG of connection or CO 2When unsolder closed, floating voltage just can take place.
Economy of the present invention is imitated suitable considerable, uses 1 year through calculating every, can economize on electricity about 1.5 ten thousand degree, amount to more than 4000 yuan of RMB, this machine stable performance, best results, function are complete substantially, yet no matter on function, or on capacity, and even on the economic benefit, or on easy to use, in welding field, must very bend the umber one for generation.
The concrete structure of invention is drawn by following examples and accompanying drawing.
Fig. 1 is that CO is being made in this invention 2Connection diagram when gas shielded arc welding and metal argon arc welding (MIG):
(1) CO 2Gas bomb.
(2) CO 2The decompression flow regulator.
(3) snorkel.
(4) CO 2Decompression flow regulator heating power supply line.
(5) control circuit.
(6) earth cable.
(7) electrode cable.
(8) escape pipe.
(9) wire-feed motor control cable.
(10) wire-feed motor.
(11) weldering is robbed.
(12) welded piece.
Fig. 2 is the functional-block diagram of control circuit of the present invention.
Fig. 3 is the main circuit diagram in the control circuit of the present invention.
Fig. 4 is that floating voltage is set up and voltage-frequency change-over circuit schematic diagram in the control circuit of the present invention.
Fig. 5 is that the multiple external characteristics in the control circuit of the present invention obtains circuit theory diagrams.
Fig. 6 is frequency division and the trigger impulse output circuit schematic diagram in the control circuit of the present invention.
Fig. 7 is that the back-pressure in the control circuit of the present invention detects and delay circuit figure.
Fig. 8 is pulse generation and the standard initialization circuit schematic diagram in the control circuit of the present invention.
Fig. 9 is the TIG/MIG weldering control circuit figure in the control circuit of the present invention.
Figure 10 is the wire feed alignment circuit schematic diagram in the control circuit of the present invention.
Figure 11 is the sequential control circuit schematic diagram in the control circuit of the present invention.
Figure 12 is the control power principle figure in the control circuit of the present invention.
Figure 13 is the inverter fundamental diagram of the main circuit in the control circuit.
Figure 14 is multiple external characteristic curve and two kinds of output characteristics figures.
Figure 15 is frequency division and pulse shaping sequential chart.
Has multi-functional thyristor inversion arc welding equipment with reference to one of Fig. 1, Fig. 2, its control circuit obtains circuit (7), wire feed alignment circuit (8), pulse generation and standard initialization circuit (9), sequential control circuit (10), TIG/MIG weldering control circuit (11), control power circuit compositions such as (12) by main circuit ［ 1,3 ］, back-pressure detection and delay circuit ［ 2 ］, floating voltage foundation and voltage-frequency change-over circuit (4), frequency division and trigger impulse output circuit (5), sample circuit (6), external characteristics.
Provided main circuit (1,3) with reference to Fig. 3, entered main circuit (1,3), through D from the high-voltage fence of 380V 1～D 6(6 * ZP50A/1000V), D 1～D 6Diode two ends C in parallel respectively 1R 2, C 2R 4, C 3R 6, C 4R 1, C 5R 3, C 6R 5Deng the three-phase bridge rectifier circuit that 6 groups of rc protection circuits are formed, rectification goes out the DC voltage of 514V, through controllable silicon SCR 1, SCR 2(2 * KK200A) carry out inversion, through main transformer B 1Lotus root close, through D 11, D 12(ZK300A/1000V * 2) and B 1Secondary coil is formed the secondary full-wave rectification, to output.
From B 1Inferior electrode capacitance C 19Positive terminal is drawn and is connected to the IC that external characteristics obtains circuit (7) 1Input, as the voltage negative feedback signal of control circuit, and from B 1Draw on the current divider FL on the centre cap lead-out wire, be equivalent to the DC voltage of 75mv,, feed back to multiple external characteristics and obtain IC in the circuit (7) as the current feedback signal of control circuit 2Input.Controllable silicon SCR 1, SCR 2Control utmost point G 1' K 1', G 2' K 2' receive the transformer B of frequency division and trigger impulse output circuit (5) respectively 1, B 2Secondary two ends.Be used for guaranteeing controllable silicon SCR 1, SCR 2Conducting in turn in order to guarantee the requirement of output characteristics, is also adopted some other technical measures: by diode D in the main circuit (1,3) 7, D 8(ZK20 * 2), R 10(5/80W) form the release circuit, by L 3, L 4, C 19(1500uf/100v) form T type Lu ripple device, diode D 9, D 10(1N4007) * 2, with back-pressure detect with delay circuit (2) in D 1, D 2Constitute full bridge rectifier, in the input and the controllable silicon SCR of main circuit (1,3) 1, SCR 2Between the series connection resistance R 7(0～10/200W) is resistance flowing resistance and choking winding L 1, other end string L 2Four groups of change of current capacitor C in parallel with inverter 7～C 14(8 * 4uf/500v), by universal switch S(K 1, K 2, K 3) control, its four groups conversion change of current electric capacity (4uf, 8uf, 12uf, 16uf), promptly by change of current capacitor C 7～C 14, controlled SCR 1, SCR 2And the feature circuit of the primary coil of main transformer formation main circuit (1,3), the operation principle of its inverter is seen accompanying drawing 13, the power of inverter and its operating frequency relational expression are: P=2CE 2F, C is a change of current electric capacity in the formula, is a definite value, and E is that the input voltage (514V) of inverter is definite value, and the proportional relation of P and f is so by changing the frequency of inverter, reach the requirement that changes power output.
With reference to Fig. 4, provide the electrical schematic diagram and the component parameters connection diagram of floating voltage foundation and voltage-frequency change-over circuit ［ 4 ］.
By IC 2, IC 3, IC 4, IC 5(1/2LM339 * 4) form four groups of voltage comparators, IC 1Two ends also are connected to R 3(10K), C 1(0.022 μ f), DW 1The integrated computing of voltage-stabiliser tube (μ A714) IC 1, and mu balanced circuit ［ BG 1(S9013), DW 2～DW 4, D 2(1N4004) ］ etc. form a closed-loop system, overturn, when finishing reverse drawing, pulse frequency, pulse width, pulse coupling etc., form the pulse process of a requirement by certain sequential.
By D 2, DW 4, DW 3, DW 2Form mu balanced circuit surely at 24 volts.Work as U 0When point is 75 volts of left and right sides, BG 3Conducting, the C that main circuit is secondary 19Stop charging, this moment, voltage-frequency converter was turned off inverter SCR 1, SCR 2Quit work, on the contrary when floating voltage little when the certain value, triode BG 3Conducting, voltage-frequency converter, inverter is started working, to capacitor C 19Charging so goes round and begins again.
Fig. 5 has provided electric principle and the component parameters signal connection layout that multiple external characteristics obtains circuit ［ 7 ］.
Multiple external characteristics obtains circuit (7), by the scale operation IC circuit 1, IC 2, (μ A741 * 2) and subtraction IC circuit 3(standard initialization circuit) formed closed loop negative feedback system, after utilizing the standard setting value and amplification or dwindling, carries out subtraction at the feedback quantity with an order of magnitude, i.e. the closed loop forming process: feedback quantity → difference → reverse frequency → feedback quantity.
Computing circuit IC 1, IC 2Output and input be parallel with R respectively 3C 1(10K/0.47 μ f), R 15C 2(100K/0.1 μ f), and its output passes through resistance R 9With R 8(85K 10K) is connected on a bit, and thus by a resistance R 10(10K) draw and receive on the characteristic change-over switch K.
Lead to from multithrow switch K " 1 " point and to obtain the constant voltage external characteristics, lead to the acquisition external characteristics of constant current, lead to from " 2 " point of multithrow switch K and obtain fall volt-ampere characteristic and at IC from " 3 " point of K switch 2On potentiometer W 1Reach the effect of cut-off frequency.
External characteristics of constant current and constant voltage external characteristics obtain basic identical on method, i.e. the current signal that sampling on the FL from main circuit (1,3) obtains, and reality is 75mV voltage, through IC 2(uA741) amplify 100 times and pass through R for 7.5V 19With R 11, R 12Carry out subtraction with the standard initialization circuit, obtain external characteristics of constant current by " 3 " on multithrow switch K point.The constant voltage external characteristics is similar substantially to external characteristics of constant current, " 1 " point on K switch leads to the constant voltage external characteristics, between constant voltage and constant current, promptly gets each a certain proportion of composition of constant voltage and constant current so, just obtain fall volt-ampere characteristic, fall volt-ampere characteristic is drawn from " 2 " point on the multithrow switch K.
Fig. 6 has provided the principle and the component parameters signal connection layout of frequency division and trigger impulse output circuit ［ 5 ］.
By IC 1, IC 2Compose in series d type flip flop (74LS74) mutually, at IC 2Q, Q the end, be connected to the identical impulse output circuit ［ R of two-way respectively 1, BG 1(S9013), C 1, D 1(1N4004), B 1, be the sequential difference that two group pulses take place, its sequential is determined by frequency dividing circuit (5).
Because controllable silicon SCR 1, SCR 2Alternate conduction must have a frequency dividing circuit to guarantee, two divided-frequency is carried out in the pulse that voltage-frequency converter produces, and makes the inverter operate as normal.
The formation of trigger impulse: work as IC 2Q end when being high level by low level transition, triode BG 1(S9013) conducting, capacitor C at this moment 1By triode BG 1, B 1Primary coil discharges, B 1Secondary generation induced electromotive force, C then 2After the discharge, both end voltage is zero, and the electric current that the effect of self-induction produces is by diode D 1, vibration is stopped, the pulse generation process stops.R 3, C 2(240 Ω, 0.022 μ f) forms the capacitance-resistance absorption circuit, prevents that vibration from producing higher hamonic wave, guarantees the inverter operate as normal.
Another road (BG 2, C 2, D 2, B 2) identical therewith, its sequential difference is controlled by sequential control circuit.
Fig. 7 has provided principle and the component parameters connection diagram of back-pressure detection with delay circuit ［ 2 ］.
Judge controllable silicon SCR 1, SCR 2Reliable turn-off detects controllable silicon and whether bears back-pressure, detect bear back-pressure after, delay time a period of time with delay circuit, guarantee the controllable silicon reliable turn-off.
The D of the input of back-pressure detection and delay circuit (2) 1, D 2(1N4004), with main circuit in D 9, D 10Form the full-bridge rectification detecting circuit and and the delay circuit of its output between, adopt photoisolator IC 1(T9136) be coupling element.At IC 1Input and be connected to D 0With three mutually the serial connection D 3～D 5Particularly the delay circuit to its output has certain requirement: the 80 μ s that will delay time after controllable silicon two ends back-pressure signal detection is come out, when its back-pressure signal did not detect, this delay circuit was wanted automatic time delay 2ms, had guaranteed controllable silicon SCR thus 1, SCR 2Reliable turn-off.
In main circuit (1,3): SCR 1There is back-pressure, i.e. SCR 1Cathode voltage be higher than anode voltage, i.e. (F 0＞F +), then electric current flows through D 2, R 2(27K) and IC 1(T9136) with main circuit in D 9, R 15Form loop (1N4007,510/30W) and make IC 1Conducting, back-pressure is detected, makes BG this moment 1End.15 volts of power supplys pass through resistance R 6(1.2K) diode D 8(1N4004) to capacitor C 1(0.01 μ f) charging, when the B point voltage greater than IC 2During negative terminal, IC 2Upset impels voltage-frequency converter circuit (4) work, R 6C 1Time constant be back-pressure delay time constant, be about 80 μ s.When the back-pressure signal does not detect, phototriode IC 1End transistor BG 1Conducting, C at this moment 1Pass through R 7(100K) charging, R 7C 1Charge constant be about 2ms.Automatic time delay 2ms guarantees the controllable silicon reliable turn-off, if omission, or the testing circuit damage, then maintain this process always, the frequency when this moment, inverter frequency was also greater than zero load, (2-4Hz).
Electric principle and component parameters signal that Fig. 8 has provided pulse output and standard initialization circuit (9) connect figure:
By capacitor C 1(0.047 μ f), integrated transporting discharging IC 2(μ A741), multithrow switch K, form impulse generator with by W 1//W 2, BG 1, DW 1The standard initialization circuit of forming connects by a switch.
When pulse output K switch 1When closing in an instant between, C point current potential is zero, B point current potential is a partial pressure value, its voltage swing is by R 3(10K), W 2(10K) dividing potential drop decision, U B＞U CPoint current potential, IC at this moment 1(μ A741) output O point current potential+15 volts passes through W 1The FE section, D 2(1N4148) R 1(10K) to capacitor C 1U is worked as in (0.47 μ f) charging a=U bDuring point, IC 1Upset makes IC 1Output O point current potential is-15 volts, at this moment capacitor C 1Pass through R 1, D 1, W 1DF section discharge, when making the C point voltage be lower than the B point voltage, IC 1Upset once more, charging hockets IC once more 1Export a pulse, W among the figure 1Be the duty cycle adjustment turn-knob, charge constant is big more, and dutycycle is big more.W 2Be the regulating impulse frequency, P point dividing potential drop is more little, and B point voltage value is more little, and then toggle frequency is high more, when the output pulse is high level, and triode BG 1Potentiometer W is set in conducting 3, W 4(15K, 10K) takes out voltage is maximum, and when being output as negative 15 volts, vice versa.From BG 1(D just 8Positive pole) base stage draws a K switch 2As TIG/MIG weldering transposing switch.
Fig. 9 has provided TIG/MIG weldering control circuit (11) schematic circuit and component parameters schematic diagram.
Photoisolator IC 1, IC 2The negative pole end of input, respectively by a resistance R 2, R 7And be connected to respectively and C between the ground 3, C 4The K switch that is in parallel 1, K 2, when the present invention doing TIG/MIG when weldering, be by K switch on the welding torch handgrip 1, K 2Control also only because so, just can finish TIG/MIG weldering function.
When 1. TIG welds: be K switch 2, IC 2, BG 2, BG 3Execution work is when welding torch handgrip K switch 2When closing, IC 2Conducting, BG 2End capacitor C 2Pass through R 11, R 12Charging impels BG 3Base potential more and more higher (∵ is the PNP pipe) is so cause BG 3End, finish TIG weldering control.
2. MIG welding: be by K switch 1, IC 1, BG 1K switch is worked as in execution work 1When closing, sequence circuit is started working, IC 1Conducting, capacitor C 1, will pass through DW 1, R 4Discharge makes triode BG 1End, the work of standard initialization circuit, welding machine brings into operation, by BG 1Colelctor electrode pass through D 1Be drawn out to MIG.
This welding machine has the two kinds of functions that increase progressively and decay.
Before closing in TIG unsolder pass (was K 2Open), BG 3So conducting is capacitor C 2Both end voltage is zero, i.e. D 3Cathode potential is zero, and its anode is by the BG of method selector switch and standard initialization circuit 1Connect, make BG 1End the handgrip K switch 2When closing, make this circuit BG 2End capacitor C 2Pass through R 12, R 11Charging makes the BG in the standard initialization circuit (9) 1Cut-off state slowly becomes conducting state, and the load both end voltage is raise, even the standard setting value raises gradually, therefore reaches the purpose that increases progressively.The above-mentioned inverse process of attenuation process.
When MIG welds: when with K switch 1When closing, sequence circuit is started working, and makes IC 1Conducting, C 1Discharge makes BG rapidly 1End, standard initialization circuit (9) work, welding machine brings into operation.
Multi-functional switching: the present invention has multiple external characteristics, and the present invention adopts single knob to switch, multi-functional switching, and 1, pulse switching, 2, MIG/TIG shakes control switching, 3, external characteristics feedback sample switching, 4, the switching of method conversion indicator lamp, function is switched.
Functional switch of the present invention adopts four throw switches (S), by each single-throw switch K 1, K 2... form, power taking stream feedback and voltage feedback have fall volt-ampere characteristic during the manual metal-arc welding I.When manual metal-arc welding II and TIG weldering, a power taking stream feedback signal obtains external characteristics of constant current, and feedback signal is pressed in the gas metal-arc welding power taking.
Electric principle and element that Figure 10 has provided wire feed alignment circuit (8) connect schematic diagram:
This circuit is by transformer B 1, wire feeding motor DJ(154SN-J01), SCR 1, SCR 2Form full bridge rectifier, constitute the trigger impulse circuit by unijunction transistor BT33C, composite amplifier BG 1, BG 2Deng composition wire feed alignment circuit (8).
The voltage of motor D J is by controllable silicon SCR 1, SCR 2The angle of flow determine that the angle of flow is big more, armature voltage is big more.The positive pole of electric motor loop and speed control loop " " be connected on a bit, alignment circuit is by B 1Primary coil, SCR 1, SCR 2, the full bridge controllable silicon rectification circuit formed such as DJ.By unijunction transistor BIT 1The trigger impulse that produces triggers.
Pass through BG 3The control signal voltage of being sent here by sequence circuit is added to BG 2Base stage, pass through R again thus 10Guide to the negative terminal of buncher DJ, W 1On voltage swing, the decision BG 2Base stage and the size of current between the emitter stage, this electric current is through BG 1, BG 2Carry out compound amplification, be the input signal of unijunction transistor.
Work as BIT 1During conducting, at D 2Two ends produce a spike, go to trigger controllable silicon SCR 1, SCR 2
BG 3For the gauge tap of alignment circuit, work as BG 3When ending, alignment circuit is not worked.
Figure 11 has provided sequential control circuit (10), in welding procedure, when carrying out the TIG weldering, need supply gas in advance, lag behind and die.When carrying out the MIG weldering, supply gas earlier, wire feed welds again then, and welding stops wire feed earlier, and then stops to supply gas after finishing.Therefore, need a sequential control circuit.
During the MIG weldering, after MIG weldering handgrip switch closes, capacitor C 4By diode D 6, resistance R 15Discharge makes BG rapidly 5End, make BG 4Conducting, then electromagnetic gas valve DF starts working, and therefore the gas circuit conducting, makes BG simultaneously 3Be in low level, so capacitor C 3Pass through R 7, R 8Charging, this charging interval is worked as capacitor C for supplying gas the time in advance 3Charge value is greater than voltage stabilizing DW 1The voltage stabilizing value time, make BG 2Conducting makes BG 1End, wire feeding circuit is started working, and has finished in advance and has supplied gas, then wire feed.
When welding finishes, unclamp the MIG unsolder and close K 2, make capacitor C 4Pass through R 15, R 16Charging is at first overturn for making the circuit of supplying gas, and is last, and wire feeding circuit is quit work, and this time difference dies the time for lagging behind, and above process is the MIG weldering and supplies gas earlier, after back wire feed and the welding end, stop wire feed earlier after, stop the sequential of supplying gas again.
When doing the TIG weldering, the circuit as long as control is supplied gas, finishing lags behind dies.
Figure 12 provides the control circuit power supply:
This machine control circuit adopts integrated voltage stabilizing sheet to replace mu balanced circuit, the integrated voltage stabilizing sheet of circuit IC 1, IC 2, IC 3Be respectively " 7815 ", " 7915 " and " 7805 ", C 1, C 2(being 1000 μ F/25v * 2), C 3(100 μ f/16v), C 4(0.1 μ f), R 1(10 Ω), R 2(10K) wait composition, it is output as ± 15V and+5V output.
This power supply also has the DC voltage of one+50V, the transformer B from the speed-regulating control circuit (8) that accompanying drawing 10 provides 1Be added to wire feed alignment circuit and sequential control circuit through 50 volts of direct currents of IC401 full-wave rectification.
Annotate: because of this invention electrical schematic diagram breadth is too big, duplicating is unclear.Therefore total electrical schematic diagram is divided into ten parts.(accompanying drawing 3～12).

Claims (8)

1, a kind of thyristor inversion arc-welding machine, particularly a kind of multi-functional thyristor inversion arc welding equipment of multifunction electronic control circuit is characterized in that:
A. multi-functional thyristor inversion arc welding equipment, by main circuit (1,3), back-pressure detection and delay circuit (2), floating voltage foundation and voltage-frequency change-over circuit (4), frequency division and trigger impulse output circuit (5), sample circuit (6), external characteristics obtain circuit (7), wire feed alignment circuit (8), pulse generation and standard initialization circuit (9), sequential control circuit (10), TIG/MIG weldering control circuit (11), control power circuit compositions such as (12);
B. floating voltage is set up and voltage-frequency change-over circuit (4), adopts the closed-loop system circuit, by IC 2, IC 3, IC 4, IC 5Four voltage comparators that constitute and integrated transporting discharging IC 1Form;
C. main circuit (1), (3) are by change of current capacitor C 7～C 14, controllable silicon SCR 1, SCR 2With main transformer B 1The controllable silicon series connection half bridge inverter circuit of forming;
D. external characteristics obtains circuit (7), adopts the closed loop negative feedback system circuit, by voltage ratio computing circuit (IC 1, R 8, R 10), current ratio computing circuit (IC 2, R 8, R 10) and standard initialization circuit (IC 3, R 11, R 12) and the K switch formation;
E. frequency division and trigger impulse output circuit (5) are by (BG 1, C 1, D 1, B 1) form two identical triggering pulse shaping circuits, be connected to by IC respectively 1, IC 2Two integrated d type flip flop IC that are connected in series mutually 2Q, the Q two ends;
F. back-pressure detects and delay circuit (2), the full-bridge rectification testing circuit (D of its input 9, D 10, D 1, D 2) with the delay circuit (BG of its output 1, R 6, R 7, C 1, IC 2) between adopt photoisolator (IC 1Model T9136) is coupling element;
G. pulse output and standard initialization circuit (9), two regulator potentiometer W that are in parallel 3, W 4Be connected in series a transistor BG 1(S9013);
H.TIG/MIG welds control circuit (11), is connected to K switch on the welding torch handgrip respectively 2And K 1
M.TIG/MIG welds control circuit (11), between its input and the output circuit, all adopts IC respectively 2And IC 1The photoelectricity coupling;
I. wire feed alignment circuit (8) adopts thyristor speed control circuit (B 1, SCR 1, SCR 2, DJ, R 1, BIT 1);
Q. sample circuit (6), the B in main circuit (1,3) 1Be connected to current divider FL (75mV/500A) on the secondary centre tap line;
Y. sequential control circuit (10) is provided with and K switch 2The circuit DF that supplies gas that joins.
2, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: the output of main circuit (1), (3) also is connected to capacitor C 18(1500 μ f/100V).
3, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: BG 2Output and IC 3Input, pass through resistance R respectively 8And R 11Be connected to by (BG 3, R 10, DW 2, DW 3, DW 4, D 2Serial connection mutually) mu balanced circuit of formation.
4, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: voltage ratio computing circuit (IC 1), current ratio computing circuit (IC 2) and standard initialization circuit (IC 3) between be connected to characteristic change-over switch K.
5, by claim 1 or 4 described multi-functional thyristor inversion arc-welding machines, it is characterized in that: voltage and and current ratio computing circuit IC 1, IC 2Output passes through resistance R 9(85K), R 8(10K) connect a bit, and pass through resistance R thus 10(10K) guide on the K switch.
6, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: work as BG 1C when ending 1Charge constant R 6C 1〉=80 μ S work as BG 1R during conducting 7C 1=2 μ S.
7, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: integrated transporting discharging IC 1The output of (μ A741) and the negative terminal and the anode of input meet potentiometer W respectively 1, W 2
8, by the described multi-functional thyristor inversion arc-welding machine of claim 1, it is characterized in that: the positive terminal in motor (DJ) loop and speed control loop " " be connected on some the positive terminal of motor and triode BG 2Base stage pass through resistance R 10(47K) join.
CN 92232242 1992-09-01 1992-09-01 Multifunctional silicon controlled inverter arc welder Expired - Fee Related CN2138001Y (en)

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CN 92232242 CN2138001Y (en) 1992-09-01 1992-09-01 Multifunctional silicon controlled inverter arc welder

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CN 92232242 CN2138001Y (en) 1992-09-01 1992-09-01 Multifunctional silicon controlled inverter arc welder

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1066992C (en) * 1994-06-08 2001-06-13 东北重型机械学院南校 Field effect tube positively excited inversion thermal protection type arc welder
CN102035294A (en) * 2010-12-06 2011-04-27 郑美波 Planetary gear speed reducing wire feeding motor equipment, wire feeding device and welding system
CN105478966A (en) * 2016-01-14 2016-04-13 浙江肯得机电股份有限公司 220 V and 380 V double-power-source IGBT inversion multifunctional welding machine
CN106141516A (en) * 2016-08-05 2016-11-23 江苏现代造船技术有限公司 A kind of industry welding machine intelligent monitor system and monitoring method
CN107530814A (en) * 2014-12-10 2018-01-02 伊利诺斯工具制品有限公司 System and method for detecting the IGCT that do not work in welding system
CN109822188A (en) * 2019-03-14 2019-05-31 江苏新扬子造船有限公司 A kind of small-bore air hose automatic soldering device of rectangle and its working method
CN112091367A (en) * 2020-09-28 2020-12-18 宁波天德创新智能科技有限公司 Welding process data acquisition system of direct current welding machine and using method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1066992C (en) * 1994-06-08 2001-06-13 东北重型机械学院南校 Field effect tube positively excited inversion thermal protection type arc welder
CN102035294A (en) * 2010-12-06 2011-04-27 郑美波 Planetary gear speed reducing wire feeding motor equipment, wire feeding device and welding system
CN102035294B (en) * 2010-12-06 2012-10-03 郑美波 Planetary gear speed reducing wire feeding motor equipment, wire feeding device and welding system
CN107530814A (en) * 2014-12-10 2018-01-02 伊利诺斯工具制品有限公司 System and method for detecting the IGCT that do not work in welding system
CN107530814B (en) * 2014-12-10 2020-01-10 伊利诺斯工具制品有限公司 System and method for detecting a inoperative thyristor in a welding system
CN105478966A (en) * 2016-01-14 2016-04-13 浙江肯得机电股份有限公司 220 V and 380 V double-power-source IGBT inversion multifunctional welding machine
CN105478966B (en) * 2016-01-14 2017-03-08 浙江肯得机电股份有限公司 A kind of 220V and 380V dual power supply IGBT inversion multifunctional welding machine
CN106141516A (en) * 2016-08-05 2016-11-23 江苏现代造船技术有限公司 A kind of industry welding machine intelligent monitor system and monitoring method
CN109822188A (en) * 2019-03-14 2019-05-31 江苏新扬子造船有限公司 A kind of small-bore air hose automatic soldering device of rectangle and its working method
CN112091367A (en) * 2020-09-28 2020-12-18 宁波天德创新智能科技有限公司 Welding process data acquisition system of direct current welding machine and using method

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