CN203541813U - Digitization multifunctional solar electric arc welding machine - Google Patents
Digitization multifunctional solar electric arc welding machine Download PDFInfo
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- CN203541813U CN203541813U CN201320755586.3U CN201320755586U CN203541813U CN 203541813 U CN203541813 U CN 203541813U CN 201320755586 U CN201320755586 U CN 201320755586U CN 203541813 U CN203541813 U CN 203541813U
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Abstract
The utility model relates to the technical field of electric welding machines, in particular to a digitization multifunctional solar electric arc welding machine. The digitization multifunctional solar electric arc welding machine comprises a preceding stage common power supply circuit, an auxiliary power supply circuit, a master control circuit, a welding machine control circuit, a wire feeder control circuit and a wire feeder motor which is connected with the wire feeder control circuit. Electric currents are divided into three routes after passing through the preceding stage common power supply circuit, and the electric currents enter the wire feeder control circuit, the welding machine control circuit and the auxiliary power supply circuit respectively. According to the digitization multifunctional solar electric arc welding machine, the wire feeder control circuit and the preceding stage common power supply circuit are connected, so that the wire feeder control circuit and the welding machine control circuit share the same power supply, and an additional power supply does not need to be arranged; meanwhile, the input voltage of the wire feeder control circuit is lowered, an insulated isolation part does not need to be additionally arranged in the wire feeder control circuit, the size of the entire machine is decreased, the weight of the entire machine is lowered, production and marketing cost is reduced, and daily production operation is facilitated.
Description
Technical field
the utility model relates to electric welding machine technical field, is specifically related to a kind of digital multifunctional solar-electricity arc-welding machine.
Background technology
at present, contravariant welding machine has been widely used in the weld job of industrial every profession and trade to various non-ferrous metals and alloy thereof.Contravariant welding machine is lightweight with it, and volume is little, consumes copper material, steel are few, energy-saving effect is remarkable and welding technological properties is outstanding and favored by user during production.Digitalization multifunctional inversion type welding machine adopts the digital control chip control source of welding current and automatic wire feeding device, and multiple welding procedure is integrated in one, and realizes the increment of one-machine-multi-function and uses, and the automaticity of welding is improved.Chinese invention patent publication number is: CN103386535A, denomination of invention is: in the technical scheme of a < < digital inverse welder > >, a kind of digital inverse welder is provided, but, this digital inverse welder in use, it needs extraneous power supply to power, and it cannot be applicable to the environment that field etc. lacks extraneous power supply.
Summary of the invention
for overcoming above-mentioned defect, the purpose of this utility model is to provide a kind of digital multifunctional solar-electricity arc-welding machine.
the purpose of this utility model is achieved through the following technical solutions:
the utility model is a kind of digital multifunctional solar-electricity arc-welding machine, mainly comprise: solar energy conversion input circuit, prime public power circuit, auxiliary power circuit, main control circuit, welding machine control circuit, control circuit for wire feeder, and the wire-feed motor motor being connected with control circuit for wire feeder;
described solar energy conversion input circuit is connected with prime public power circuit, for extraneous solar energy is converted to electric energy, and this electric energy is input to prime public power circuit;
described prime public power circuit comprises: the soft starting circuit being linked in sequence by current direction and filter circuit, and electric current is divided into three tunnels after by filter circuit, enters respectively control circuit for wire feeder, welding machine control circuit, auxiliary power circuit;
described control circuit for wire feeder comprises: wire-feed motor front-end controlling circuit and wire-feed motor rear end control circuit, and electric current, successively after wire-feed motor front-end controlling circuit and wire-feed motor rear end control circuit, is connected with wire-feed motor motor; Described wire-feed motor front-end controlling circuit comprises: the first translation circuit; Described wire-feed motor rear end control circuit comprises: parallel with one another first whole/freewheeling circuit, secondary side current feedback circuit;
described welding machine control circuit comprises: welding machine front-end controlling circuit and welding machine rear end control circuit, and electric current, successively after welding machine front-end controlling circuit and welding machine rear end control circuit, enters the output of welding machine control circuit; Described welding machine front-end controlling circuit comprises: the second translation circuit parallel with one another and pulse current all-wave sample circuit, described pulse current all-wave sample circuit is for gathering the pulsed current signal that the second translation circuit receives, and using this pulse signal as feedback information, be sent to main control circuit, described welding machine rear end control circuit comprises: parallel with one another second whole/freewheeling circuit, voltage/current feedback circuit;
described auxiliary power circuit is connected with described main control circuit, is used to main control circuit that stable direct-current working volts are provided;
described main control circuit is connected with the second translation circuit, pulse current all-wave sample circuit, voltage/current feedback circuit in described welding machine control circuit, the feedback information sending for receiving pulse current all-wave sample circuit, voltage/current feedback circuit, processes this feedback information; And send corresponding pulsed current signal to the second translation circuit; Described main control circuit is also connected with the first translation circuit, secondary side current feedback circuit in control circuit for wire feeder, receive the feedback information that described main control circuit receives the first translation circuit, secondary side current feedback circuit, and send wire-feed motor control command to this first translation circuit.
further, described solar energy is changed input circuit into photovoltaic cell group.
further, described the first translation circuit is single-end ortho-exciting translation circuit, and described the second translation circuit is alternating expression step-down conversion circuit; Described alternating expression step-down conversion circuit produces after the pulse push-pull signal of two-way complementation, is delivered to second whole/freewheeling circuit; And the dutycycle of each road pulse push-pull signal is all lower than 50%.
further, the utility model also comprises: control interface circuit, described control interface circuit is connected with described main control circuit, for to main control circuit input of control commands and read the status information of main control circuit, and this status information is shown.
further, in the control circuit of described wire-feed motor rear end, be also provided with back-emf sampling/feedback circuit, described back-emf sampling/feedback circuit is connected with the armature in wire-feed motor motor, and back-emf sampling/feedback circuit is comprised of operational amplifier U1D, U1B, analog switch U12, resistance R 33, R34, R40 and capacitor C 36, C40; The voltage of the armature in wire-feed motor motor will be to deliver to analog switch U12 lower than the voltage of 3.3V and after capacitor C 36 filtering interfering are by operational amplifier U1B emitter following through resistance R 33, R34 dividing potential drop, after the real-time gating of analog switch U12, deliver on the sampling hold circuit being formed by resistance R 40 and capacitor C 40, after operational amplifier U1D emitter following, be delivered to the entrance of main control circuit; Back-emf sampling/feedback circuit is sent to main control circuit by the back-emf signal voltage of the wire-feed motor motor collecting; Analog switch U12 is during main control circuit suspends transmission wire-feed motor control command, treat to be opened after the armature inductance afterflow action of wire-feed motor motor, wire-feed motor motor is equivalent to the back-emf that a dc generator sends because inertia rotates and as the sign amount signal voltage of rotating speed, detects, as feedback information, to main control circuit, send.
further, described main control circuit comprises:
low-frequency pulse signal generator, high-frequency pulse signal generator and MIG weldering pulse width modulation module;
described low-frequency pulse signal generator is used for occurring low frequency pulse current signal;
described high-frequency pulse signal generator is used for occurring high-frequency pulse current signal;
described MIG weldering pulse width modulation module is connected with low-frequency pulse signal generator, high-frequency pulse signal generator and alternating expression step-down conversion circuit respectively, for periodically driving low frequency pulse current signal, change the current peak of pulsed current signal and the width of base value ratio frequently, to realize the modulation of high-frequency pulse current signal, and the high-frequency pulse current signal through ovennodulation is exported to alternating expression step-down conversion circuit.
further, in described wire-feed motor front-end controlling circuit, also comprise: the primary side current feedback circuit in parallel with the first translation circuit, described primary side current feedback circuit is used for monitoring by the magnitude of current of the first translation circuit, obtain magnitude of current information, and this magnitude of current information is sent to main control circuit as feedback information.
further, in the control circuit of described wire-feed motor rear end, also comprise: the wire-feed motor motor braking circuits being connected with main control circuit, described wire-feed motor motor braking circuits comprises: photoelectrical coupler U9, insulated gate power switching device Q4 and resistance R 22, described insulated gate power switching device Q4 is connected with the armature of wire-feed motor motor with resistance R 22, when described main control circuit stall control signal arrives photoelectrical coupler U9, photoelectrical coupler U9 delivers to this stall control signal the gate pole of insulated gate power switching device Q4, drive insulated gate power switching device Q4 conducting, make the armature of wire-feed motor motor by resistance R 22 and insulated gate power switching device Q4 shorted to earth, by magnetic field resistance, stop the rotation of wire-feed motor motor.
further, described wire-feed motor motor is printed motor.
further, described main control circuit also comprises:
acidic electrode welding module, low hydrogen type basic electrode/cellulose welding rod welding module, LIFT TIG welding module, carbon dioxide gas arc welding connection module, pulsed MIG welding module and MIG weldering pulse amplitude modulation module.
in the utility model, it is take solar energy as power supply, do not need to join with extraneous power supply, and welding machine control circuit, control circuit for wire feeder jointly adopt solar energy conversion input circuit to power and make, obtain the utility model and can be adapted to the environment in multiple field, be convenient to the operation in field.
Accompanying drawing explanation
for ease of explanation, the utility model is described in detail by following preferred embodiment and accompanying drawing.
fig. 1 is the logical construction schematic diagram of an embodiment of the present utility model;
fig. 2 is circuit structure schematic diagram of the present utility model;
the oscillogram that Fig. 3 drives for the alternating expression step-down conversion circuit in the utility model;
fig. 4 is the back-emf sampling/feedback circuit electromotive force sampling schematic diagram in the utility model;
fig. 5 is the external characteristic curve figure of the common acidic electrode welding in the utility model;
fig. 6 is the low hydrogen type basic electrode/cellulose welding rod external characteristic curve figure in the utility model;
fig. 7 is the external characteristic curve figure of the LIFT TIG welding in the utility model;
fig. 8 is the external characteristic curve figure of the carbon dioxide gas arc welding in the utility model;
fig. 9 is the welding sequential chart of the carbon dioxide gas arc welding in the utility model;
figure 10 is the pulsed MIG welding oscillogram in the utility model;
figure 11 is the dipulse MIG welding control waveform figure of the employing amplitude modulation(PAM) in the utility model;
figure 12 is the dipulse MIG welding control waveform figure of the employing width modulated in the utility model.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further described.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1, Fig. 2, the utility model is a kind of digital multifunctional solar-electricity arc-welding machine, mainly comprise: solar energy conversion input circuit 800, prime public power circuit 100, auxiliary power circuit 200, main control circuit 300, welding machine control circuit 400, control circuit for wire feeder 500, and the wire-feed motor motor 600 being connected with control circuit for wire feeder; Main control circuit 300 is MCU1;
Described solar energy conversion input circuit 800 is connected with prime public power circuit 100, for extraneous solar energy is converted to electric energy, and this electric energy is input to prime public power circuit 100;
Described prime public power circuit 100 comprises: the soft starting circuit 101 that is linked in sequence by current direction, with filter circuit 102, described soft starting circuit 101 is comprised of power switch S1, semistor RT1, relay J D1; Electric current is divided into three tunnels after by filter circuit 102, enters respectively control circuit for wire feeder, welding machine control circuit, auxiliary power circuit; ;
Described control circuit for wire feeder 500 comprises: wire-feed motor front-end controlling circuit 510 and wire-feed motor rear end control circuit, and electric current, is connected with wire-feed motor motor 600 through after wire-feed motor front-end controlling circuit 510 and wire-feed motor rear end control circuit 520 successively; Described wire-feed motor front-end controlling circuit 510 comprises: the first translation circuit; Described wire-feed motor rear end control circuit comprises: parallel with one another first whole/freewheeling circuit 521, secondary side current feedback circuit 522; Described first whole/freewheeling circuit 521 is comprised of fast recovery diode D15, D16; Described secondary side current feedback circuit 522 is comprised of operational amplifier U1C, resistance R 23, R35, R36, R37 and capacitor C 37 etc., for detection of the current strength in first whole/freewheeling circuit 521;
Described welding machine control circuit 400 comprises: welding machine front-end controlling circuit 410 and welding machine rear end control circuit 420, and electric current through after welding machine front-end controlling circuit 410 and welding machine rear end control circuit 420, enters the output of welding machine control circuit 400 successively; Described welding machine front-end controlling circuit 410 comprises: the second translation circuit parallel with one another and pulse current all-wave sample circuit 411, described pulse current all-wave sample circuit 411 is comprised of transformer T2, fast recovery diode D5, D6, D7, D8, resistance R 13 and capacitor C 17 etc., the pwm pulse current signal that it receives for gathering the second translation circuit, and this pwm pulse signal is sent to main control circuit 300, the pwm pulse signal to output that main control circuit 300 can be real-time is adjusted; Described welding machine rear end control circuit 420 comprises: parallel with one another second whole/freewheeling circuit 421, voltage/current feedback circuit 422; Described second whole/freewheeling circuit 421 is comprised of fast recovery diode group D3, D4 and inductance L 1 etc.; Described voltage/current feedback circuit 422 is comprised of operational amplifier U1A, resistance R 9, R10, R11, capacitor C 12, C13, C14, C15 and Zener diode D9 etc.; Described voltage/current feedback circuit 422 is for detection of the output voltage/electric current of second whole/freewheeling circuit 421;
Described auxiliary power circuit 200 is connected with main control circuit 300, it is comprised of three end flyback switching integrated circuit U5, flyback transformer T3, three end line integrated package of pressure-stabilizing U6, U7, fast recovery diode D11, D12, D13, D25 photoelectrical coupler U13, Zener diode D14, resistance R 15, R17, R18 and capacitor C 22, C23, C24, C25, C26, C27, C28, C29, C30, C31 etc., and it provides stable direct-current working volts for main control circuit 300;
Described main control circuit 300 is connected with the second translation circuit, pulse current all-wave sample circuit 411, voltage/current feedback circuit 422 in described welding machine control circuit 400, the feedback information sending for receiving pulse current all-wave sample circuit 411, voltage/current feedback circuit 422, processes this feedback information; And send corresponding pulsed current signal to the second translation circuit; Described main control circuit 300 is also connected with primary side current feedback circuit, the first translation circuit, secondary side current feedback circuit 522 in control circuit for wire feeder 500, when receiving described main control circuit 300 and receiving the feedback information of primary side current feedback circuit, the first translation circuit, secondary side current feedback circuit 522, and send corresponding wire-feed motor control command to this first translation circuit.
Further, described solar energy is changed input circuit into photovoltaic cell group.Because the utility model adopts photovoltaic cell group, power, its power supply is dc source, makes the utility model not need to carry out front end rectification, has simplified the structure of complete machine.
Please refer to Fig. 3, described the first translation circuit is single-end ortho-exciting translation circuit 511, this single-end ortho-exciting translation circuit 511 is by insulated gate power switching device Q6, driving transformer T6, photoelectrical coupler U10, contravariant transformer T4, fast recovery diode D15, D16, D17, D19, D20, Zener diode D21, D22, PNP triode Q5, resistance R 24, R31, R30, R32, the compositions such as R44 and capacitor C 33, described the second translation circuit is alternating expression decompression transformation (BUCK) circuit 412, described alternating expression step-down conversion circuit 412 is by insulated gate power switching device group Q1, Q2, driving transformer T1, resistance R 1, R2, R3, R4, R5, R6, R7, R8 and capacitor C 6, C7, C8, the compositions such as C9, described alternating expression step-down conversion circuit 412 produces after the pulse push-pull signal of two-way complementation, is delivered to second whole/freewheeling circuit 421, and the dutycycle of each road pulse push-pull signal is all lower than 50%.One tunnel pulse push-pull signal is by photoelectrical coupler U3, it is elementary that U4 delivers to pulse transformer T1, after through pulse transformer T1, isolation is transmitted, through resistance R 1, R2, R3, R4, R5, R6, capacitor C 6, C7, diode D1, after D2 shaping, deliver to respectively insulated gate power switching device group Q1 and Q2 gate pole, driven insulated gate power switching device group Q1 and Q2, although deliver to the PWM drive pulse waveform dutycycle of insulated gate power switching device group Q1 and Q2 gate pole, be all less than 50%, but it is that original twice dutycycle can be greater than 50%(between 0%-100% that the break-make waveform of Q1 and Q2 has just become frequency altogether) break-make waveform.This has just reached the PWM that transmits 0%-50% dutycycle by magnetic coupling mode and has obtained the object of 0%-100% dutycycle break-make waveform, and chopping frequency has also obtained frequency multiplication.After copped wave, by inductance L 1 chokes energy storage, fast recovery diode group D3, D4 afterflow, just at DC output end, obtain the required electric energy of welding.With centre tapped pulse current transformer T2, be a kind of especial operation of current transformer in the utility model; pulse current transformer T2 crosses an electric current point phase flow of insulated gate power switching device group Q1 and Q2 respectively that it is elementary; just to have obtained positive and negative pulsewidth be respectively current pulse shape between 0%-50% to level secondarily; by sampling through resistance R 13 after the full-wave rectification being formed by D5, D6, D7, D8 fast recovery diode, after capacitor C 17 filtering interfering, deliver to MCU1 digital processing system and do corresponding current feedback and overcurrent protection processing.In addition; by operational amplifier U1A and peripheral devices, form output voltage pressure sampling circuit; resistance R 9, R10, capacitor C 12, Zener diode D9 composition dividing potential drop, over-voltage clamping protection and interference filter circuit 102; 0 volt to tens volts voltage of welding machine output is changed into the voltage of 0V-3.3V, the voltage of exporting 0V-3.3V after operational amplifier U1A emitter following on resistance R 11 and capacitor C 15 parallel circuits is delivered to MCU1 digital processing system as Voltage Feedback voltage signal and is done corresponding Voltage Feedback processing.
Further, the utility model also comprises: control interface circuit 700, controlling interface circuit 700 is MCU2; Described control interface circuit 700 is connected with described main control circuit 300, for to main control circuit 300 input of control commands and read the status information of main control circuit 300, and this status information is shown.Main control circuit 300 is connected by USART serial ports with control interface circuit 700, control interface circuit 700 operator's welding parameter instruction is read in to system, pass to again main control circuit 300, so that control circuit for wire feeder 500, welding machine control circuit 400 are sent to pulsewidth modulation instruction, control welding parameter.
Please refer to Fig. 4, in the control circuit of described wire-feed motor rear end, be also provided with back-emf sampling/feedback circuit 523, described back-emf sampling/feedback circuit 523 is connected with the armature in wire-feed motor motor 600, and back-emf sampling/feedback circuit 523 is comprised of operational amplifier U1D, U1B, analog switch U12, resistance R 33, R34, R40 and capacitor C 36, C40; The voltage of the armature in wire-feed motor motor 600 will be to deliver to analog switch U12 lower than the voltage of 3.3V and after capacitor C 36 filtering interfering are by operational amplifier U1B emitter following through resistance R 33, R34 dividing potential drop, after the real-time gating of analog switch U12, deliver on the sampling hold circuit being formed by resistance R 40 and capacitor C 40, after operational amplifier U1D emitter following, be delivered to the entrance of main control circuit 300; Back-emf sampling/feedback circuit 523 is sent to main control circuit 300 by the back-emf signal voltage of the wire-feed motor motor 600 collecting.Back-emf sampling/feedback circuit 523 by the process that gathers back-emf signal voltage is: main control circuit 300 suspends frequency P WM(Pulse Width Modulation regularly, pulse width modulation) pulse, and at its interval, after treating armature inductance afterflow action, wire-feed motor motor 600 is equivalent to the back-emf that a dc generator sends because inertia rotates and as the sign amount signal voltage of rotating speed, detects, deliver to main control circuit 300 and do the signal voltage of speed feedback.
Further, described main control circuit 300 comprises:
Low-frequency pulse signal generator, high-frequency pulse signal generator and MIG weldering pulse width modulation module;
Described low-frequency pulse signal generator is used for occurring low frequency pulse current signal;
Described high-frequency pulse signal generator is used for occurring high-frequency pulse current signal;
Described MIG(metal inert-gas welding, welding) weldering pulse width modulation module respectively with low-frequency pulse signal generator, high-frequency pulse signal generator is connected with alternating expression step-down conversion circuit 412, for periodically driving low frequency pulse current signal, change the current peak of pulsed current signal and the width of base value ratio frequently, to realize the modulation of high-frequency pulse current signal, and the high-frequency pulse current signal through ovennodulation is exported to alternating expression step-down conversion circuit 412, to meet the width modulated of dipulse MIG welding.Described MIG weldering pulse width modulation module spends low frequency pulse signal the width of modulation high-frequency impulse MIG waveform, periodically change the current peak of high-frequency impulse MIG and the width ratio of base value, and do not change its current amplitude, reach the pulse width modulation result of the pulse of low-frequency pulse to high impulse MIG weldering.Can by the width of high-frequency impulse from close to acyclic homologically trioial to its Breadth Maximum, adjustable extent is very large.But can not change the amplitude of its pulse current, the regulating effect that has reached wide region is not subject to again critical injection electric current I
orestriction, the dipulse MIG welding manner of this width modulated has been to having reduced the average current in each cycle, reduced the heat input of mother metal, alleviated the heat accumulation effect of mother metal, more goes a step further.Obtain the crystal grain refinement more of molten wide corrugated weld seam more even, attractive in appearance, seam organization, increased substantially the total quality of weld seam, can adopt the dipulse MIG weldering of width modulated to carry out meticulous welding to delicate workpieces.
Further, in described wire-feed motor front-end controlling circuit 510, also comprise: the primary side current feedback circuit 512 in parallel with the first translation circuit, described primary side current feedback circuit 512 is by transformer T5, fast recovery diode D18, the compositions such as resistance R 29 and capacitor C 35, by current transformer T5, can obtain the On current signal of insulated gate power switching device Q6, by diode D18 rectification, resistance R 29, after capacitor C 35 sampling filters, deliver to main control circuit 300, as the current monitoring signal of insulated gate power switching device Q6, can Real-Time Monitoring flow through the electric current of insulated gate power switching device Q6, protection Q6 exempts from overcurrent damage in time.Resistance R 24, capacitor C 33 and diode D17 composition RDC peak voltage absorbing circuit, guarantee that Q6 exempts from overvoltage and damages.The electric current that flows through wire feeding motor is sampled through resistance R 23; after the in-phase amplifier forming via operational amplifier U1C and resistance R 35, R36, R37 capacitor C 37 again, deliver to main control circuit 300; as wire feeding motor current monitoring, to protect motor can not damage because of overcurrent.By primary side current feedback circuit 512 is set; electric current to the first translation circuit detects; and the magnitude of current information detecting is sent to main control circuit as feedback information, and normal to guarantee the running of the first translation circuit, further to reach the object of protection wire-feed motor motor.
Further, in the control circuit of described wire-feed motor rear end, also comprise: the wire-feed motor motor braking circuits 524 being connected with main control circuit 300, described wire-feed motor motor braking circuits 524 comprises: photoelectrical coupler U9, insulated gate power switching device Q4 and resistance R 22, described insulated gate power switching device Q4 is connected with the armature of wire-feed motor motor 600 with resistance R 22, when described main control circuit 300 stall control signals arrive photoelectrical coupler U9, photoelectrical coupler U9 delivers to this stall control signal the gate pole of insulated gate power switching device Q4, drive insulated gate power switching device Q4 conducting, make the armature of wire-feed motor motor 600 by resistance R 22 and insulated gate power switching device Q4 shorted to earth, powerful magnetic field resistance will stop wire-feed motor motor 600 to continue rotation, wire-feed motor motor 600 will stop rapidly.Because wire-feed motor motor also requires that stall signal is had to enough response speeds, therefore, when main control circuit 300 stops sending driving signal to wire-feed motor motor, although there is not driving force in wire-feed motor motor, but it can remain in operation because of inertia, now, by the driving of main control circuit 300, wire-feed motor motor braking circuits 524 will effectively be braked wire-feed motor motor, makes it reach the high speed that stops.
Further, described wire-feed motor motor 600 is printed motor.Because the welding jig of digital high precision all has higher velocity-stabilization degree and the requirement of response speed to automatic feeding part, therefore, traditional power frequency controlled rectification drives, the DC servo motor of armature voltage FEEDBACK CONTROL does not reach requirement.For reaching above-mentioned requirements, wire-feed motor motor 600 can adopt printed motor that rotary inertia is less as wire feeding motor.
Further, described main control circuit 300 also comprises:
Acidic electrode welding module, low hydrogen type basic electrode/cellulose welding rod welding module, LIFT TIG(non-consumable gas shielded arc welding) welding module, carbon dioxide gas arc welding connection module, pulsed MIG welding module and dipulse MIG welding module; Wherein, described dipulse MIG welding module comprises: MIG weldering pulse amplitude modulation module and MIG weldering pulse width modulation module.
Except common acidic electrode welding module, low hydrogen type basic electrode/cellulose welding rod welding module belong to the automatic startup of start, other LIFT TIG welding module, carbon dioxide gas arc welding connection module, pulsed MIG welding module and dipulse MIG welding module etc. are by arc welding gun switch control start and stop.
Please refer to Fig. 5, the process that acidic electrode welding module is realized common acidic electrode welding function in the utility model is specially:
When operator drives acidic electrode welding module, after main control circuit 300 is exported sampling electric current to welding supply and voltage, make calculation process, output pwm signal goes to control the staggered BUCK break-make of insulated gate power switching device, finally at welding terminal, obtain the volt/peace curve shown in Fig. 5, curve meets the arc voltage formula V of common acidic electrode welding
0=20+0.04I
0, when being operated in little electric current welding conditions, system program has suitably added the permanent power hyperbola external characteristics of some low arc voltages, to increase arc force.
Please refer to Fig. 6, the process that low hydrogen type basic electrode/cellulose welding rod welding module is realized low hydrogen type basic electrode/cellulose welding rod welding function in the utility model is specially:
When operator drives low hydrogen type basic electrode/cellulose welding rod welding module, after main control circuit 300 is exported sampling electric current to welding supply and voltage, make calculation process, output pwm signal goes to control the staggered BUCK break-make of insulated gate power switching device, finally at welding terminal, obtain the volt/peace curve shown in Fig. 6, curve meets the arc voltage formula V of low hydrogen type basic electrode/cellulose welding rod welding
0=30+0.04I
0.
The utility model is the hangover electric current of the special 180A left and right arranging of low hydrogen type basic electrode/cellulose welding rod, and hangover flex point is 18V left and right.This is that the particularity of electric arc arranges while welding according to low hydrogen type basic electrode/cellulose welding rod, object be when welding welding machine when arc voltage approaches short circuit lower than about 18V left and right welding rod and workpiece provide a larger electric current and push molten bath open, in order to avoid welding rod and workpiece short circuit make welding process non-normal termination generation welding procedure defect.
Please refer to Fig. 7, in the utility model, LIFT TIG welding module is realized the detailed process of LIFT TIG welding function and is:
When operator drives LIFT TIG welding module, after main control circuit 300 digital processing systems are exported sampling electric current to welding supply and voltage, make calculation process, output pwm signal goes to control the staggered BUCK break-make of insulated gate power switching device, finally at welding terminal, obtain the volt/peace curve shown in Fig. 7, curve meets the arc voltage formula V of LIFT TIG welding function
0=10+0.04I
0.
TIG is a kind of non-melt pole soldering of inert gas shielding, and what electrode material adopted is refractory metal tungsten, and welding always contacts tungsten electrode the weld seam of welded piece while starting, and opens and promotes the tungsten electrode generation electric arc that spaces out after welding current.For fear of workpiece, ooze tungsten and cause electrochemical corrosion in the future, the utility model is provided with LIFT TIG striking welding manner.
Its principle is: when starting LIFT TIG welding; operator contacts welding gun tungsten electrode with welded piece weld seam; press arc welding gun switch S2; this signal is delivered to after main control circuit 300 array manipulation systems are processed and is opened protective gas air valve VAL1; then export the minimum LIFT electric current that is not enough to deposite metal; to avoid oozing tungsten, until promoting tungsten electrode, operator spaces out after generation electric arc, electric current rises to rapidly as welding setting value.What such control mode can be avoided workpiece completely oozes tungsten phenomenon, and welding quality is ensured.
Please refer to Fig. 8, Fig. 9, in the utility model, carbon dioxide gas arc welding connection module is realized the detailed process of carbon dioxide gas arc welding connection function and is:
When operator selects carbon dioxide gas arc welding welding function; after main control circuit 300 digital processing systems are exported sampling electric current to welding supply and voltage, make calculation process; output pwm signal goes to control the staggered BUCK break-make of insulated gate power switching device; finally at welding terminal, obtain the volt/peace curve shown in Fig. 8, curve meets the arc voltage formula V of carbon dioxide gas arc welding welding function
0=15+0.05I
0.
When starting carbon dioxide gas arc welding welding; operator presses arc welding gun switch S2; this signal is delivered to after main control circuit 300 array manipulation systems are processed and is opened protective gas air valve VAL1; then export high non-load voltage and coordinate wire feed striking at a slow speed; after striking success, stablize arc voltage and wire feed rate, the welding parameter of setting according to operator is welded.
When welding finishes, operator presses rifle switch S 2 and enters receipts arc program, then enters bead program, and wire-feed motor is shut down and braked, and source of welding current output voltage is down to bead voltage standard and is stopped output voltage after time delay a period of time simultaneously.So just make welding wire termination after welding finishes only have minimum molten ball, for the striking of welding next time, created good condition, guarantee arcing initiation success rate.Finally, treat that molten bath stops protective gas output after cooling, welding quality is ensured.
Receiving arc program is exactly the little welding conditions that one section of low-voltage is joined slow wire feed, plays the object of filling up arc crater when welding finishes.
Please refer to Figure 10, in the utility model, pulsed MIG welding module is realized the detailed process of pulsed MIG welding function and is:
MIG welding manner is actual is that welding connects mode.After welding wire melts under inert gas shielding atmosphere, in the mode of transition of spraying, being transitioned into molten bath, is a kind of welding manner efficiently.
But welding wire will reach spray transfer needs certain condition, needs welding current to reach certain value---exceed critical current, if welding current is less than this value, can not produce spray transfer.
The suitable welding current spray transfer that exceedes critical current has face of weld forming, the advantage such as little of splashing, but due to the restriction of critical current, the condition that makes to reach spray transfer must be that electric current is enough large, and during spray transfer welding, on workpiece, molten bath volume is large, molten dark large.Therefore, be difficult to the welding of thin plate, be difficult to vertical position welding welding.
For this reason, the utility model is provided with pulse MIC welding mode and solves this problem: pulse MIC welding mode can make welding current reach the critical current of spray transfer requirement, and the heat input to molten bath in the time of reducing again welding, reduces molten bath volume and the degree of depth.When needing the droplet transfer, electric current exceedes the critical current of injection, guarantees at ordinary times a very little electric current pilot arc, and the average current of welding process is reduced.Both meet the condition of spray transfer, greatly limited again the heat input to workpiece.Large electric current guarantees the requirement of spray transfer, and little electric current guarantees that the droplet transfer pulse MIC welding mode of one, the arteries and veins of pilot arc is a basic direction of modern welding.
By main control circuit 300 digital processing systems, to producing suitable pulse current control waveform, electric current switches between background current and peak point current back and forth by certain suitable frequency.
Pulse background current is much smaller than spray transfer critical current; Pulse peak current is greater than spray transfer critical current, and the pulse peak current duration is called peak value of pulse width, and pulse base value current duration is called pulse base value width.
Peak value of pulse, pulse base value, peak value of pulse time and the pulse base value time of pulse control waveform can be set according to welding process requirement, according to different welding process requirement, can design different pulse current waveform control programs, under spray transfer welding procedure pattern, the workpiece of different materials and different thicknesss of slab be welded guaranteeing.
During operator's strobe pulse MIG weldering welding function, after main control circuit 300 digital processing systems are exported sampling electric current to welding supply and voltage, make calculation process, output pwm signal goes to control the staggered BUCK break-make of insulated gate power switching device, finally at welding terminal, obtain volt/peace curve of constant current, the arc voltage formula V of curve coincidence pulse MIG weldering welding function
0=14+0.05I
0.
When starting pulse MIC welding welding; operator presses arc welding gun switch S2; this signal is delivered to after main control circuit 300 array manipulation systems are processed and is opened protective gas air valve VAL1; then export high non-load voltage and coordinate wire feed striking at a slow speed; after striking success, stablize wire feed rate, the pulse welding current parameters output pulse current of setting according to operator welds.
When welding finishes, operator presses rifle switch S 2 and enters the arc program of receiving, and receipts arc program is exactly the pulse MIC welding standard of a section little, plays the object of filling up arc crater when welding finishes.Then wire-feed motor is shut down and is braked, and simultaneously the source of welding current is defeated stops output sending after last current impulse, last, treats that molten bath stops protective gas output after cooling.
The utility model has also designed dipulse MIG welding function, adopt peak current level or the peak point current duration width of low-frequency pulse to the higher pulse of frequency to modulate, the intensity that makes unit pulse strong and weak between low-frequency cycle property switch, obtain periodically variable strong, weak impulse train.
Welding current after modulation meets desired molten drop spray transfer form, and the arc force and the heat input that make again to act in molten bath change with low frequency modulations frequency.High-frequency impulse is the droplet transfer in order to realize one, an arteries and veins, and low-frequency pulse is in order to control molten bath; High-frequency impulse transition one drip melt drips, and a low-frequency cycle forms a molten bath.
This pulse welding mode has further reduced the average current in each cycle, has further reduced the heat input of mother metal, has alleviated the heat accumulation effect of mother metal, can obtain molten wide corrugated weld seam even, attractive in appearance.Meanwhile, also can strengthen the stirring action in molten bath, make the defect factors such as the bubble that forms in metal being excluded early.And also refinement the crystal grain of seam organization, reduced crack sensitivity, improved the total quality of weld seam.
Please refer to Figure 11, in the utility model, MIG weldering pulse amplitude modulation module realizes the detailed process of dipulse MIG welding function and is:
Low frequency pulse signal is gone to modulate to the amplitude of high-frequency impulse MIG waveform, the current amplitude of periodic change high-frequency impulse MIG, reaches the amplitude modulation(PAM) effect of the pulse of low-frequency pulse to high-frequency impulse MIG weldering.But the dipulse MIG of the amplitude modulation(PAM) shown in figure 12 weldering is subject to the limit value of critical injection current condition, make the dipulse waveform low current amplitude after modulation can not be too small, can not be lower than critical injection electric current I
o.So the low-frequency pulse amplitude adjustable extent of the welding current waveform of amplitude modulation type dipulse MIG weldering is large not, limited to a certain extent the utilization scope of dipulse MIG weldering, be difficult to the weld job of delicate workpieces.
In order to address this problem, the utility model also provides a kind of method of being welded pulse width modulation module and realized dipulse MIG welding function by MIG, please refer to Figure 12, is specially:
Low frequency pulse signal is spent to the width of modulation high-frequency impulse MIG waveform, periodically change the current peak of high-frequency impulse MIG and the width ratio of base value, and do not change its current amplitude, reach the pulse width modulation result of the pulse of low-frequency pulse to high impulse MIG weldering.Can by the width of high-frequency impulse from close to acyclic homologically trioial to its Breadth Maximum, adjustable extent is very large.But can not change the amplitude of its pulse current, the regulating effect that has reached wide region is not subject to again critical injection electric current I
orestriction, the dipulse MIG welding manner of this width modulated is to having reduced the average current in each cycle, reduced the heat input of mother metal, alleviated the heat accumulation effect of mother metal, obtain the crystal grain refinement more of molten wide corrugated weld seam more even, attractive in appearance, seam organization, increase substantially the total quality of weld seam, can adopt the dipulse MIG weldering of width modulated to carry out meticulous welding to delicate workpieces.
The utility model is also provided with the intelligent cooling blower control system with sleep mode, and it is comprised of main devices such as temperature sensor RT2, photoelectrical coupler U2, triode Q3 and axial flow blower FAN1.Its operation principle is: the temperature sensor RT2 being placed on insulated gate power switching device group Q1, Q2 radiator is transformed into voltage signal amount by radiator temperature amount, deliver to the ADC port of digital processing system main control circuit 300, by processing, output control signal removes to drive photoelectrical coupler U2, removes Control Shaft flow fan FAN1.When radiator temperature is lower need not carry out forced air cooling time, main control circuit 300 will allow axial flow blower FAN1 stall, avoid on the one hand unnecessary waste, saves electric energy, improve efficiency, on the other hand also can extending shaft flow fan service life.When radiator temperature reaches certain value, main control circuit 300 will send instruction, allow axial flow blower FAN1 rotate, to heat abstractor forced air cooling.
the foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a digital multifunctional solar-electricity arc-welding machine, it is characterized in that, comprise: solar energy conversion input circuit, prime public power circuit, auxiliary power circuit, main control circuit, welding machine control circuit, control circuit for wire feeder, and the wire-feed motor motor being connected with control circuit for wire feeder;
Described solar energy conversion input circuit is connected with prime public power circuit, for extraneous solar energy is converted to electric energy, and this electric energy is input to prime public power circuit;
Described prime public power circuit comprises: the soft starting circuit being linked in sequence by current direction and filter circuit, and electric current is divided into three tunnels after by filter circuit, enters respectively control circuit for wire feeder, welding machine control circuit, auxiliary power circuit;
Described control circuit for wire feeder comprises: wire-feed motor front-end controlling circuit and wire-feed motor rear end control circuit, and electric current, successively after wire-feed motor front-end controlling circuit and wire-feed motor rear end control circuit, is connected with wire-feed motor motor; Described wire-feed motor front-end controlling circuit comprises: the first translation circuit; Described wire-feed motor rear end control circuit comprises: parallel with one another first whole/freewheeling circuit, secondary side current feedback circuit;
Described welding machine control circuit comprises: welding machine front-end controlling circuit and welding machine rear end control circuit, and electric current, successively after welding machine front-end controlling circuit and welding machine rear end control circuit, enters the output of welding machine control circuit; Described welding machine front-end controlling circuit comprises: the second translation circuit parallel with one another and pulse current all-wave sample circuit, described pulse current all-wave sample circuit is for gathering the pulsed current signal that the second translation circuit receives, and using this pulse signal as feedback information, be sent to main control circuit, described welding machine rear end control circuit comprises: parallel with one another second whole/freewheeling circuit, voltage/current feedback circuit;
Described auxiliary power circuit is connected with described main control circuit, is used to main control circuit that stable direct-current working volts are provided;
Described main control circuit is connected with the second translation circuit, pulse current all-wave sample circuit, voltage/current feedback circuit in described welding machine control circuit, the feedback information sending for receiving pulse current all-wave sample circuit, voltage/current feedback circuit, processes this feedback information; And send corresponding pulsed current signal to the second translation circuit; Described main control circuit is also connected with the first translation circuit, secondary side current feedback circuit in control circuit for wire feeder, receive the feedback information that described main control circuit receives the first translation circuit, secondary side current feedback circuit, and send wire-feed motor control command to this first translation circuit.
2. digital multifunctional solar-electricity arc-welding machine according to claim 1, is characterized in that, described solar energy is changed input circuit into photovoltaic cell group.
3. digital multifunctional solar-electricity arc-welding machine according to claim 2, is characterized in that, described the first translation circuit is single-end ortho-exciting translation circuit, and described the second translation circuit is alternating expression step-down conversion circuit; Described alternating expression step-down conversion circuit produces after the pulse push-pull signal of two-way complementation, is delivered to second whole/freewheeling circuit; And the dutycycle of each road pulse push-pull signal is all lower than 50%.
4. digital multifunctional solar-electricity arc-welding machine according to claim 3, it is characterized in that, also comprise: control interface circuit, described control interface circuit is connected with described main control circuit, for to main control circuit input of control commands and read the status information of main control circuit, and this status information is shown.
5. digital multifunctional solar-electricity arc-welding machine according to claim 4, it is characterized in that, in the control circuit of described wire-feed motor rear end, be also provided with back-emf sampling/feedback circuit, described back-emf sampling/feedback circuit is connected with the armature in wire-feed motor motor, and back-emf sampling/feedback circuit is comprised of operational amplifier U1D, U1B, analog switch U12, resistance R 33, R34, R40 and capacitor C 36, C40; The voltage of the armature in wire-feed motor motor will be to deliver to analog switch U12 lower than the voltage of 3.3V and after capacitor C 36 filtering interfering are by operational amplifier U1B emitter following through resistance R 33, R34 dividing potential drop, after the real-time gating of analog switch U12, deliver on the sampling hold circuit being formed by resistance R 40 and capacitor C 40, after operational amplifier U1D emitter following, be delivered to the entrance of main control circuit; Back-emf sampling/feedback circuit is sent to main control circuit by the back-emf signal voltage of the wire-feed motor motor collecting; Analog switch U12 is during main control circuit suspends transmission wire-feed motor control command, treat to be opened after the armature inductance afterflow action of wire-feed motor motor, wire-feed motor motor is equivalent to the back-emf that a dc generator sends because inertia rotates and as the sign amount signal voltage of rotating speed, detects, as feedback information, to main control circuit, send.
6. digital multifunctional solar-electricity arc-welding machine according to claim 5, is characterized in that, described main control circuit comprises:
Low-frequency pulse signal generator, high-frequency pulse signal generator and MIG weldering pulse width modulation module;
Described low-frequency pulse signal generator is used for occurring low frequency pulse current signal;
Described high-frequency pulse signal generator is used for occurring high-frequency pulse current signal;
Described MIG weldering pulse width modulation module is connected with low-frequency pulse signal generator, high-frequency pulse signal generator and alternating expression step-down conversion circuit respectively, for periodically driving low frequency pulse current signal, change the current peak of pulsed current signal and the width of base value ratio frequently, to realize the modulation of high-frequency pulse current signal, and the high-frequency pulse current signal through ovennodulation is exported to alternating expression step-down conversion circuit.
7. digital multifunctional solar-electricity arc-welding machine according to claim 6, it is characterized in that, in described wire-feed motor front-end controlling circuit, also comprise: the primary side current feedback circuit in parallel with the first translation circuit, described primary side current feedback circuit is used for monitoring by the magnitude of current of the first translation circuit, obtain magnitude of current information, and this magnitude of current information is sent to main control circuit as feedback information.
8. digital multifunctional solar-electricity arc-welding machine according to claim 7, it is characterized in that, in the control circuit of described wire-feed motor rear end, also comprise: the wire-feed motor motor braking circuits being connected with main control circuit, described wire-feed motor motor braking circuits comprises: photoelectrical coupler U9, insulated gate power switching device Q4 and resistance R 22, described insulated gate power switching device Q4 is connected with the armature of wire-feed motor motor with resistance R 22, when described main control circuit stall control signal arrives photoelectrical coupler U9, photoelectrical coupler U9 delivers to this stall control signal the gate pole of insulated gate power switching device Q4, drive insulated gate power switching device Q4 conducting, make the armature of wire-feed motor motor by resistance R 22 and insulated gate power switching device Q4 shorted to earth, by magnetic field resistance, stop the rotation of wire-feed motor motor.
9. digital multifunctional solar-electricity arc-welding machine according to claim 8, is characterized in that, described wire-feed motor motor is printed motor.
10. digital multifunctional solar-electricity arc-welding machine according to claim 9, is characterized in that, described main control circuit also comprises:
Acidic electrode welding module, low hydrogen type basic electrode/cellulose welding rod welding module, LIFT TIG welding module, carbon dioxide gas arc welding connection module, pulsed MIG welding module and MIG weldering pulse amplitude modulation module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320755586.3U CN203541813U (en) | 2013-11-27 | 2013-11-27 | Digitization multifunctional solar electric arc welding machine |
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| CN201320755586.3U CN203541813U (en) | 2013-11-27 | 2013-11-27 | Digitization multifunctional solar electric arc welding machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439621A (en) * | 2014-11-05 | 2015-03-25 | 深圳华意隆电气股份有限公司 | Refined multifunctional welding system and control method thereof |
| CN104985288A (en) * | 2015-06-26 | 2015-10-21 | 惠州市国树焊接器材有限公司 | System for removing welding wire ball through gas shield welding |
| CN105171189A (en) * | 2015-09-30 | 2015-12-23 | 深圳华意隆电气股份有限公司 | Welding device for inverse type soft switch |
| CN108406043A (en) * | 2018-04-20 | 2018-08-17 | 吴忠市中心电焊机有限公司 | Photovoltaic welding machine |
-
2013
- 2013-11-27 CN CN201320755586.3U patent/CN203541813U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439621A (en) * | 2014-11-05 | 2015-03-25 | 深圳华意隆电气股份有限公司 | Refined multifunctional welding system and control method thereof |
| CN104439621B (en) * | 2014-11-05 | 2016-08-31 | 深圳华意隆电气股份有限公司 | One becomes more meticulous Multifunctional welding welding system and control method thereof |
| CN104985288A (en) * | 2015-06-26 | 2015-10-21 | 惠州市国树焊接器材有限公司 | System for removing welding wire ball through gas shield welding |
| CN104985288B (en) * | 2015-06-26 | 2018-12-14 | 惠州市国树焊接器材有限公司 | A kind of system that gas shield welding connects welding wire ball |
| CN105171189A (en) * | 2015-09-30 | 2015-12-23 | 深圳华意隆电气股份有限公司 | Welding device for inverse type soft switch |
| CN108406043A (en) * | 2018-04-20 | 2018-08-17 | 吴忠市中心电焊机有限公司 | Photovoltaic welding machine |
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Granted publication date: 20140416 Termination date: 20171127 |