CN103801798B - Arc voltage induction automatic welding machine head unit - Google Patents
Arc voltage induction automatic welding machine head unit Download PDFInfo
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- CN103801798B CN103801798B CN201410078813.2A CN201410078813A CN103801798B CN 103801798 B CN103801798 B CN 103801798B CN 201410078813 A CN201410078813 A CN 201410078813A CN 103801798 B CN103801798 B CN 103801798B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/124—Circuits or methods for feeding welding wire
- B23K9/125—Feeding of electrodes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a kind of arc voltage induction automatic welding machine head unit, comprise welding head and control module; Described control module comprises energy supply control module and electric machine speed regulation module; Described energy supply control module comprises auxiliary power module, arc voltage power module and electrical source exchange unit; When welding head is in holding state, adopt auxiliary power module for its power supply; When welding head is started working, cut off auxiliary power module and adopt arc voltage power module for its power supply; Switching between described auxiliary power module and arc voltage power module is switched by described electrical source exchange unit; The status information of described electric machine speed regulation module Real-time Collection welding head, thus the wire feed rate or the welding wire melting rate that regulate welding head.The arc voltage induction automatic welding machine head unit that the present invention proposes, strong adaptability and simple to operate.
Description
Technical field
The present invention relates to welding control technology field, refer to a kind of arc voltage induction automatic welding machine head unit especially.
Background technology
Along with the development of solder technology, very important intermetallic composite coating means are become in current industrial production.Especially seem more important in industries such as shipbuilding, harbour machinery, pressure vessel, oil-gas pipeline, metal structure factory building, power constructions, the requirement of welding efficiency, welding quality, Welding Safety operation is also more and more higher.Along with cost of human resources rises year by year, conventional metals processing and manufacturing industry faces must accelerate the transformation of automatic production model.
Substantially constant speed or gearshift adjustment mode is adopted both at home and abroad about automatic welding head control technology, mate constant voltage constant-voltage welding source (CV) or the constant current dropping characteristic source of welding current respectively, the working power of welding head must be separately extra simultaneously, extend cable length and be subject to current supply circuit voltage drop restriction, the large scope of operation, long distance welding scene bad adaptability; In addition there is welding material or gage of wire bad adaptability, it is large that operation controls difficulty.
Summary of the invention
In view of this, the object of the invention is to propose a kind of arc voltage induction automatic welding machine head unit, strong adaptability and simple to operate.
Based on above-mentioned purpose a kind of arc voltage induction automatic welding machine head unit provided by the invention, comprise welding head and control module;
Described control module comprises energy supply control module and electric machine speed regulation module;
Described energy supply control module comprises auxiliary power module, arc voltage power module and electrical source exchange unit; When welding head is in holding state, adopt auxiliary power module for its power supply; When welding head is started working, cut off auxiliary power module and adopt arc voltage power module for its power supply; Switching between described auxiliary power module and arc voltage power module is switched by described electrical source exchange unit;
The status information of described electric machine speed regulation module Real-time Collection welding head, thus the wire feed rate or the welding wire melting rate that regulate welding head.
In some embodiments, described welding head comprises the printed motor for the wire feed rate or welding wire melting rate controlling welding head; Described control module also comprises and minimizes control system and motor commutation unit; Described motor commutation unit comprises commutation control unit and commutation performance element;
The output signal of electric machine speed regulation module is as commutation performance element input signal, and commutation performance element is controlled by commutation control unit and input signal is realized motor commutation function through the first coil switch by specific phase sequence output.
In some embodiments, described electric machine speed regulation module comprises circuit of motor speed regulation control based, pwm control circuit and electric machine speed regulation power conversion unit;
The setting signal of the feedback signal of printed motor and welding wire melting rate is passed through the difference amplifier output speed margin of error to described pwm control circuit by described circuit of motor speed regulation control based;
Described velocity error amount is converted to pwm signal and is input to described electric machine speed regulation power conversion unit thus the wire feed rate or the welding wire melting rate that regulate printed motor by described pwm control circuit.
In some embodiments, described electric machine speed regulation power conversion unit comprises pulse driving circuit, machine operation ON time circuit and energy consumption of electrical machinery skidding circuit.
In some embodiments, described motor commutation unit also comprises the communtation protection network be connected with described commutation performance element; Communtation protection network absorbs surge peak voltage when being used for the first coil switch contact commutation and during switching, afterflow avoids contact arc discharge to damage.
In some embodiments, described electrical source exchange unit comprises the second coil switch, control the switching of second switch in the second coil switch by the adhesive of the second coil in the second coil switch and disconnection, thus realize the switching between auxiliary power module and arc voltage power module.
In some embodiments, described welding head also comprises gear reduction box, four-wheel wire feed assembly; Described printed motor connects described gear reduction box, and described gear reduction box connects described four-wheel wire feed assembly, thus ensures to stablize wire feed.
In some embodiments, the described welding head electric installation that also comprises solder flux bucket, discharge nozzle, welding gun bar and be integrated in below welding head; Described electric installation comprises conducting rod, ignition tip, discharging cover, conductive plate, flux hopper;
Described solder flux bucket connects described flux hopper by discharge nozzle; Described welding gun bar connects described conducting rod, and described ignition tip is arranged on conducting rod end by ignition tip seat, and described conductive plate is arranged on conducting rod top, and described discharging is set on described ignition tip end; Described discharge nozzle adopts detachable connection with the junction of flux hopper.
As can be seen from above, arc voltage induction automatic welding machine head unit provided by the invention, realize conditions at the arc accurately to sample, accurate control wire melting and welding wire send state to, ensure that wire melting is equal with feed rate of welding wire, do not change by outside weldings condition changes such as welding material change, gage of wire change, dry extension of electrode change, the changes of welding protection gas simultaneously; In addition, described arc voltage induction automatic welding machine head unit operating voltage is arc voltage, need not additionally provide independent power supply, reduce control system power supply power consumption, improve welding cable length adaptive capacity, reduce operation easier, improve welding quality.
Further, by energy supply control module being set to accessory power supply in conjunction with the operating voltage of arc voltage as system, there is provided system works power supply can complete the functions such as welding head display and upper lower wire feeding hose by accessory power supply before welding process does not start and complete the front welding wire tip position adjustment of welding and welded condition detection, beginning through interlock circuit automatic switchover operating voltage when welding process is arc voltage; Thus achieve dual power supply work and the seamless automatic switchover of dual power supply.
Preferably, electric machine speed regulation module adopts PWM control technology adjustment printed motor input armature voltage thus changes wire feed rate, meets welding process stability requirement; Meanwhile, Real-time Collection arc voltage and conditions at the arc, regulate the change of printed motor rotating speed thus change wire feed rate or welding wire melting rate and adjust electric arc arc length in normal range of operation, the arc length such as realization, etc. penetration welding process.
Further; control module based on PIC16F716 single-chip microcomputer comprises hardware system and embedded software system; realize crawl wire feed, crawl reels off raw silk from cocoons, weld the process control such as startup, welding stopping; realize the cold striking of automatic short-circuit pumpback or the hot striking of non-shorting slow wire feed identifies automatically simultaneously; return at the end of realizing welding process and burn pumpback and to disappear ball etc.; can complete the source of welding current in addition to start and to stop and welding parameter sets automatically, coupling automatic gas shielded welding also possesses the functions such as control gas when connecing.
Preferably, arc voltage induction automatic welding machine head unit provided by the present invention, adopted printed motor be printed-armature motor, in addition printed-armature motor module also comprises gear reduction box and four-wheel wire feed assembly, meet the use of the real core metal welding wire of φ 1.6-6.0 or flux-cored wire, wire feed rate scope 0.2m/min-6.0m/min.Wire feeder torque requirement 200NM in the embodiment of the present invention, therefore the power of printed motor is increased to 110W-150W, and the reducing gear of gear reduction box becomes multi-stage speed-reducing by single-stage speed reducing.Further; also improve the electric installation be integrated in below welding head; make described arc voltage respond to automatic welding machine head unit and be applicable to automatic consumable electrode submerged-arc welding or automatic gas shielded welding (this function switches only need be replaced with protective gas conveying device by flux transfer section, also the two can be integrated and realize two kinds of function compatibilities).
Accompanying drawing explanation
Fig. 1 is the construction module schematic diagram of arc voltage provided by the invention induction automatic welding machine head unit embodiment;
Fig. 2 is the electrical block diagram of control module in arc voltage provided by the invention induction automatic welding machine head unit embodiment;
Fig. 3 is the construction module schematic diagram of energy supply control module in arc voltage provided by the invention induction automatic welding machine head unit embodiment;
Fig. 4 is the electrical block diagram of the circuit of motor speed regulation control based in arc voltage provided by the invention induction automatic welding machine head unit embodiment in electric machine speed regulation module;
Fig. 5 is the electrical block diagram of the electric machine speed regulation power conversion unit in arc voltage provided by the invention induction automatic welding machine head unit embodiment in electric machine speed regulation module;
The electrical block diagram of the running driving control system of the arc voltage induction automatic welding carriage that Fig. 6 applies for arc voltage induction automatic welding machine head unit embodiment provided by the invention;
The electrical block diagram of the speed of travel conditional operation unit of the arc voltage induction automatic welding carriage that Fig. 7 applies for arc voltage induction automatic welding machine head unit embodiment provided by the invention;
The electrical block diagram of the movable motor speed governing major loop of the arc voltage induction automatic welding carriage that Fig. 8 applies for arc voltage induction automatic welding machine head unit embodiment provided by the invention;
Fig. 9 is the structural representation of welding head in arc voltage provided by the invention induction automatic welding machine head unit embodiment;
Figure 10 is the structural representation of the wire-feeding part of welding head in arc voltage provided by the invention induction automatic welding machine head unit embodiment.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
It should be noted that, in the embodiment of the present invention, the statement of all uses " first " and " second " is all the parameters in order to the entity or non-equal distinguishing two same names non-equal, visible " first " " second " convenience only in order to state, should not be construed as the restriction to the embodiment of the present invention, subsequent embodiment illustrates no longer one by one to this.
With reference to accompanying drawing 1, it is the construction module schematic diagram of arc voltage induction automatic welding machine head unit embodiment provided by the invention.
Described arc voltage induction automatic welding machine head unit, comprises welding head 100 and control module 200;
Described control module 200 comprises energy supply control module 206 and electric machine speed regulation module 201;
Described energy supply control module 206 comprises auxiliary power module, arc voltage power module and electrical source exchange unit (with reference to accompanying drawing 3); When welding head 100 is in holding state, adopt auxiliary power module for its power supply; When welding head 100 is started working, cut off auxiliary power module and adopt arc voltage power module for its power supply; Switching between described auxiliary power module and arc voltage power module is switched by described electrical source exchange unit;
The status information of described electric machine speed regulation module 201 Real-time Collection welding head 100, thus the wire feed rate or the welding wire melting rate that regulate welding head 100.
With reference to accompanying drawing 2, it is the electrical block diagram of control module in arc voltage induction automatic welding machine head unit embodiment provided by the invention.
Further, by reference to the accompanying drawings 1, described welding head 100 comprises the printed motor 102 of wire feed rate for controlling welding head 100 or welding wire melting rate; Described control module 200 also comprises and minimizes control system 203 and motor commutation unit 202; Described motor commutation unit 202 comprises commutation control unit and commutation performance element;
The output signal of electric machine speed regulation module 201 is as commutation performance element input signal, and commutation performance element is controlled by commutation control unit and input signal is realized motor commutation function through the first coil K switch 1 by specific phase sequence output.
Optionally, described motor commutation unit 202 also comprises the communtation protection network be connected with described commutation performance element; Communtation protection network absorbs surge peak voltage when being used for the contact commutation of the first coil K switch 1 and during switching, afterflow avoids contact arc discharge to damage.
Further, by reference to the accompanying drawings 1 and accompanying drawing 2, described control module also comprises remote communication module 204, power supply dolly start unit 205, wire-feed motor start unit 207 and operation interface 208.
The described control system 203 that minimizes comprises single-chip microcomputer (model is PIC16F716) N1, the electrify restoration circuit be made up of resistance R10, electric capacity C3 and electric capacity C6, the clock circuit that is made up of crystal oscillator G1, electric capacity C16 and electric capacity C17.
Described motor commutation unit 202 comprises commutation control unit, commutation performance element and communtation protection unit; The output signal of electric machine speed regulation module 201 is as the input signal of described commutation performance element, and described commutation performance element is controlled by described commutation control unit and is exported by specific phase sequence through the first coil K switch 1 by input signal and realize motor commutation function.Particularly, when single-chip microcomputer N1 output motor direction of rotation signal is 1, signal is through resistance R13, electric capacity C11, by open-minded for triode VT3, first coil adhesive of the first coil K switch 1, the contact 3 of the first coil K switch 1 and the contact 4 of contact 5 and the first coil K switch 1 and contact 6 are connected respectively, thus complete printed motor and rotate forward; When single-chip microcomputer N1 output motor direction of rotation signal is 0, signal is through resistance R13, electric capacity C11, triode VT3 is closed, first coil of the first coil K switch 1 disconnects, the contact 1 of the first coil K switch 1 and the contact 2 of contact 5 and the first coil K switch 1 and contact 6 are connected respectively, thus complete printed motor and reversely rotate; Contact afterflow during switching that described communtation protection network is used for contact absorption surge peak voltage and first coil K switch 1 when commutating of the first coil K switch 1 avoids contact arc discharge to damage.
Its Reference numeral in fig 2 of described remote communication module 204(is M1) adopt power carrier special module to form.Described power supply dolly start unit 205 controls the arc voltage induction automatic welding carriage that arc voltage induction automatic welding machine head unit embodiment applies and starts and system power supply startup.Described operation interface 208 comprises startup, stopping, wire feed, reels off raw silk from cocoons and various welding parameter setting (striking current, arcing time, receipts arc current, receipts arc time, welding current etc.).Described wire-feed motor start unit 207 requires chronologically to provide wire-feed motor starting switch signal after welding system completes startup, by resistance R3 in described wire-feed motor start unit 207, electric capacity C15, triode VT1, form with tertiary coil K switch 3 and control, when enabling signal or wire feed, when the signal that reels off raw silk from cocoons is effective, single-chip microcomputer N1 exports high signal (FEEDER-ON), triode VT1 conducting, the tertiary coil adhesive of tertiary coil K switch 3, the contact 18 of tertiary coil K switch 3 and the contact 23 of contact 20 and tertiary coil K switch 3 and contact 21 are closed respectively to be connected, these two groups of contacts are respectively used to printed motor (being also wire feeding motor) startup and the startup of bi-motor (movable motor of printed motor and dolly) drive system controls for subsequent use.
With reference to accompanying drawing 3, it is the construction module schematic diagram of energy supply control module in arc voltage induction automatic welding machine head unit embodiment provided by the invention.
Preferably, by reference to the accompanying drawings 1 and accompanying drawing 2, described auxiliary power module and electrical source exchange unit provide welding equipment (comprising welding head and arc voltage induction automatic welding carriage) do not start before control system (the comprising control module 200) power supply that must use, and after power initiation completes, automatically cut off the accessory power supply that auxiliary power module provides.Further, described electrical source exchange unit comprises the second coil switch K2, control the switching of second switch in the second coil switch K2 by the adhesive of the second coil in the second coil switch K2 and disconnection, thus realize the switching between auxiliary power module and arc voltage power module.
Further, the accessory power supply that auxiliary power module provides is AC17.5V alternating current or DC24V direct current, after rectifier bridge VC1 rectification, wherein a road be supplied to DCDC converter unit carry out power supply wave shape standardization processing provide rear class control power supply use, another road is supplied to electrical source exchange unit and is controlled by the control of the power supply starting signal of single-chip microcomputer N1, thus determines whether export to printed motor (that is wire feeding motor) and movable motor (movable motor of arc voltage induction automatic welding carriage) drive circuit use, particularly, before power supply does not start, the second coil adhesive of the second coil switch K2, the contact 11 of the second coil switch K2 and the contact 10 of contact 13 and the second coil switch K2 and contact 14 are closed respectively to be connected, accessory power supply normally exports and is supplied to printed motor (that is wire feeding motor) and movable motor (movable motor of arc voltage induction automatic welding carriage) drive circuit use, when after power initiation, second coil of the second coil switch K2 disconnects, the contact 11 of the second coil switch K2 and the contact 10 of contact 13 and the second coil switch K2 and contact 14 disconnect respectively, accessory power supply is cut off, drive circuit power supply turns is provided by arc voltage for printed motor (that is wire feeding motor) and movable motor (movable motor of arc voltage induction automatic welding carriage).
With reference to accompanying drawing 4 and accompanying drawing 5, be respectively the electrical block diagram of the electric machine speed regulation power conversion unit in the electrical block diagram of the circuit of motor speed regulation control based in arc voltage provided by the invention induction automatic welding machine head unit embodiment in electric machine speed regulation module and electric machine speed regulation module.
Preferably, by reference to the accompanying drawings 1 and accompanying drawing 2, described electric machine speed regulation module 201 comprises circuit of motor speed regulation control based, pwm control circuit and electric machine speed regulation power conversion unit;
The setting signal of the feedback signal of printed motor and welding wire melting rate is passed through the difference amplifier output speed margin of error to described pwm control circuit by described circuit of motor speed regulation control based;
Described velocity error amount is converted to pwm signal and is input to described electric machine speed regulation power conversion unit thus the wire feed rate or the welding wire melting rate that regulate printed motor by described pwm control circuit.
With reference to accompanying drawing 4 and by reference to the accompanying drawings 1 and accompanying drawing 2, in figure, feedback signal is provided by printed motor tach signal (wire feed rate signal) module, and in figure, burn-off rate sensing isolated location output voltage signal is provided through dividing potential drop by the guidance panel of welding tractor by setting signal; Feedback signal is through the clamped de-noising circuit that is made up of diode CR13, resistance R2, electric capacity C1 and pass to resistance R5 and resistance R4 carries out signal dividing potential drop, voltage division signal forms PI regulating circuit carry out proportional integral computing through operational amplifier N3D, resistance R7, electric capacity C2, resistance R6, meet signal dynamics response requirement, PI Output rusults forms the shaping of RC circuit via resistance R8, electric capacity C4 and passes to difference amplifier; Setting signal is through diode CR18 clamp circuit and carry out signal ratio specification through operational amplifier N3B7, resistance R12, resistance R9 and resistance R11 composition computing circuit, and the signal transmission after specification is to difference amplifier.
The velocity error amount △ V that difference amplifier exports is supplied to pwm control circuit affects output pulse width dutycycle D, output pulse width controls power model conducting dutycycle, Um=U*D, U is arc voltage, D is output duty cycle, Um is motor operating voltage, and the height of Um affects motor speed, thus determines the speed of wire feed rate.
Preferably, with reference to accompanying drawing 5 and by reference to the accompanying drawings 1 and accompanying drawing 2, described electric machine speed regulation power conversion unit comprises pulse driving circuit, machine operation ON time circuit and energy consumption of electrical machinery skidding circuit.
Particularly, DCDC power module M2 is DCDC isolated location, for driving pulse isolated location N2 provides insulating power supply; In figure, DCDC power module M2, electric capacity C5, resistance R18, electric capacity C8 and driving pulse isolated location N2 form pulse driving circuit, and pwm signal is from said PWM control circuit; Diode CR7, resistance R16, resistance R17 and diode CR5 determine the opening of field-effect transistor Q1, turn-off speed, and field-effect transistor Q1 is for controlling printed motor work ON time (determining printed motor rotating speed); Resistance R14, field-effect transistor Q2, electric capacity C7, diode CR9 and resistance R19 form energy consumption of electrical machinery skidding circuit, and when preventing motor stalls, machinery inertial causes haircuts.Diode CR3 is motor afterflow unit, complete printed motor do not have pulse voltage by time carry out afterflow.
With reference to accompanying drawing 6, respond to the electrical block diagram of the running driving control system of the arc voltage induction automatic welding carriage that automatic welding machine head unit embodiment is applied for arc voltage provided by the invention.
One of its main applied environment of arc voltage induction automatic welding machine head unit embodiment provided by the invention is arc voltage induction automatic welding carriage; The welding core texture of described welding tractor is described arc voltage induction automatic welding machine head unit, and in addition, it also comprises the running gear for trolley for advancing arc voltage to respond to the walking of automatic welding machine head unit.
The described welding tractor driving control system utilizing arc voltage to be operating voltage comprises impulse generating unit, wide region DCDC, PI module, speed of travel setting, speed of travel feedback, motor (movable motor) speed governing major loop, enabling signal monitoring unit, motor (movable motor) over-current protecting unit, PWM driving isolation unit; Wherein impulse generating unit comprises PWM device, time base circuit, the circuit such as impedance-compensated.
With reference to accompanying drawing 7, respond to the electrical block diagram of the speed of travel conditional operation unit of the arc voltage induction automatic welding carriage that automatic welding machine head unit embodiment is applied for arc voltage provided by the invention.
The described speed of travel regulates arithmetic element to be made up of speed of travel setup unit, speed of travel feedback unit, PI adjustment module.
Described speed of travel setup unit is made up of adjustable resistance RP1, electric capacity C26, diode CR8, resistance R25 and resistance R26, its operation principle is that adjustable resistance RP1 voltage division signal prevents setting signal or interfering signal from causing PI adjustment module to be damaged more than VCC through catching diode CR8 after electric capacity C26 de-noising, and resistance R25 and resistance R26 dividing potential drop ensure the relation of setting signal and feedback signal 1:1 for revising computing ratio; PI adjustment module is made up of operational amplifier N1A, resistance R28 and electric capacity C27, and foundation difference adjusts dynamically and scale amplifying multiple requires that the assembly time constant that can adjust R28*C27 ensures.When setting signal exceedes feedback signal, show that the speed of travel is partially slow, PI adjustment module regulating error amount exports as high, and this semaphore request PWM device output pulse width broadens, and movable motor armature voltage uprises, and movable motor rotating speed accelerates, and the speed of travel accelerates; When feedback signal exceedes setting signal, show that the speed of travel is fast, PI adjustment module regulating error amount exports as low, and this semaphore request PWM device output pulse width narrows, movable motor armature voltage step-down, and movable motor rotating speed is slack-off, and the speed of travel is slack-off.
With reference to accompanying drawing 8, respond to the electrical block diagram of the movable motor speed governing major loop of the arc voltage induction automatic welding carriage that automatic welding machine head unit embodiment is applied for arc voltage provided by the invention.
Described movable motor speed governing major loop comprises arc voltage self adapting circuit of polarity, energy-storage units, driving pulse switching speed control circuit, electric machine speed regulation power amplification circuit, freewheeling circuit.
Described arc voltage self adapting circuit of polarity is realized by rectifier bridge VC2, no matter input signal is straight polarity direct current (DCSP) or DC reverse connection (DCRP) can ensure that output signal phase sequence is correct all the time, thus realizes automatically identifying and self adaptation arc voltage polarity; Described electric machine speed regulation module 201 by this circuit Real-time Collection arc voltage, thus regulates the rotating speed of described printed motor.
Described energy-storage units is made up of the effect realizing arc voltage filtering energy storage resistance C19 and piezo-resistance RV1, ensure welding process instantaneous short circuit, control circuit normally works; Pulse switch speed circuit is made up of resistance R22, diode CR4, resistance R20 and diode CR3, realizes the switch wink consumption that slow opening fast shutting reduces field-effect transistor Q3; Power amplification circuit is made up of field-effect transistor Q1, when input pulse signal is high, field-effect transistor Q1 conducting, arc voltage allows to pass through, and motor rotates, armature voltage rises, when input pulse signal is low, field-effect transistor Q1 ends, and arc voltage does not allow to pass through, motor relies on diode CR6 afterflow to be continued to rotate, and armature voltage declines; Freewheeling circuit is made up of diode CR6, realizes movable motor and provide movable motor stray inductance freewheeling path between pulse voltage stand-down.
With reference to accompanying drawing 9, it is the structural representation of welding head in arc voltage induction automatic welding machine head unit embodiment provided by the invention.
Described welding head 100 comprises printed motor 102, gear reduction box 103, four-wheel wire feed assembly 104; Described printed motor 102 connects described gear reduction box 103, and described gear reduction box 103 connects described four-wheel wire feed assembly 104, thus ensures to stablize wire feed.
Further, described welding head 100 electric installation that also comprises solder flux bucket 107, discharge nozzle 113, welding gun bar 301 and be integrated in below welding head; Described electric installation comprises conducting rod 303, ignition tip seat 305, ignition tip 306, discharging cover 307, conductive plate 302, flux hopper 304.Further, with reference to accompanying drawing 10, it is the structural representation of the wire-feeding part of welding head in arc voltage induction automatic welding machine head unit embodiment provided by the invention; Described wire-feeding part comprises gear 116, straight pin 117, wire feed rolls 118, gear cover 119, wire feed wheel shaft 120, bracket 121, protective plate 122, oil-containing packing ring 123, oiliness bearing 124 and 125, milled screw 126.
Described solder flux bucket 107 connects described flux hopper 304 by discharge nozzle 113; Described welding gun bar 301 connects described conducting rod 303, and described ignition tip 306 is arranged on conducting rod 303 end by ignition tip seat 305, and described conductive plate 302 is arranged on conducting rod 303 top, and described discharging cover 307 is arranged on described ignition tip 306 end; Described discharge nozzle 113 adopts detachable connection with the junction of flux hopper 304, only flux transfer section need be replaced with at the detachable connecting portion of discharge nozzle 113 and flux hopper 304 function that protective gas conveying device can realize between automatic consumable electrode submerged-arc welding and automatic gas shielded welding to switch, make described welding head can adapt to automatic consumable electrode submerged-arc welding or automatic gas shielded welding; Certainly, also the two can be integrated and realize two kinds of function compatibilities.
Described conductive plate 302 connects described control module 200, and receives the electrically conductive signal that control module 200 sends, thus controls melting welding speed; In addition, the sampling of described arc voltage also gathers from described conductive plate 302.
In addition, described welding head also comprises the straightening-wheel 109 be arranged near four-wheel wire feed assembly 104, be arranged on wire feed bracket assembly 110 and the pressure regulating handle 112 of wire feeder side, be arranged on the wire feed entrance mouth 106 above wire feeder, and be arranged on the pointer 114 of conducting rod 303 side.
As can be seen from above, arc voltage induction automatic welding machine head unit provided by the present invention, by energy supply control module being set to accessory power supply in conjunction with the operating voltage of arc voltage as system, there is provided system works power supply can complete the functions such as welding head display and upper lower wire feeding hose by accessory power supply before welding process does not start and complete the front welding wire tip position adjustment of welding and welded condition detection, beginning through interlock circuit automatic switchover operating voltage when welding process is arc voltage; Thus achieve dual power supply work and the seamless automatic switchover of dual power supply.
Further, electric machine speed regulation module adopts PWM control technology adjustment printed motor input armature voltage thus changes wire feed rate, meets welding process stability requirement; Meanwhile, Real-time Collection arc voltage and conditions at the arc, regulate the change of printed motor rotating speed thus change wire feed rate or welding wire melting rate and adjust electric arc arc length in normal range of operation, the arc length such as realization, etc. penetration welding process.
Preferably; control module based on PIC16F716 single-chip microcomputer comprises hardware system and embedded software system; realize crawl wire feed, crawl reels off raw silk from cocoons, weld the process control such as startup, welding stopping; realize the cold striking of automatic short-circuit pumpback or the hot striking of non-shorting slow wire feed identifies automatically simultaneously; return at the end of realizing welding process and burn pumpback and to disappear ball etc.; can complete the source of welding current in addition to start and to stop and welding parameter sets automatically, coupling automatic gas shielded welding also possesses the functions such as control gas when connecing.
Arc voltage induction automatic welding machine head unit provided by the present invention, adopted printed motor be printed-armature motor, in addition printed-armature motor module also comprises gear reduction box and four-wheel wire feed assembly, meet the use of the real core metal welding wire of φ 1.6-6.0 or flux-cored wire, wire feed rate scope 0.2m/min-6.0m/min.Wire feeder torque requirement 200NM in the embodiment of the present invention, therefore the power of printed motor is increased to 110W-150W, and the reducing gear of gear reduction box becomes multi-stage speed-reducing by single-stage speed reducing.Further; also improve the electric installation be integrated in below welding head; make described arc voltage respond to automatic welding machine head unit and be applicable to automatic consumable electrode submerged-arc welding or automatic gas shielded welding (this function switches only need be replaced with protective gas conveying device by flux transfer section, also the two can be integrated and realize two kinds of function compatibilities).
Those of ordinary skill in the field are to be understood that: the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an arc voltage induction automatic welding machine head unit, is characterized in that, comprise welding head and control module;
Described control module comprises energy supply control module and electric machine speed regulation module;
Described energy supply control module comprises auxiliary power module, arc voltage power module and electrical source exchange unit; When welding head is in holding state, adopt auxiliary power module for its power supply; When welding head is started working, cut off auxiliary power module and adopt arc voltage power module for its power supply; Switching between described auxiliary power module and arc voltage power module is switched by described electrical source exchange unit;
The status information of described electric machine speed regulation module Real-time Collection welding head, thus the wire feed rate or the welding wire melting rate that regulate welding head.
2. device according to claim 1, is characterized in that, described welding head comprises the printed motor for the wire feed rate or welding wire melting rate controlling welding head; Described control module also comprises and minimizes control system and motor commutation unit; The described control system that minimizes comprises single-chip microcomputer, electrify restoration circuit, clock circuit; Described motor commutation unit comprises commutation control unit and commutation performance element;
The output signal of electric machine speed regulation module is as commutation performance element input signal, and commutation performance element is controlled by commutation control unit and input signal is realized motor commutation function through the first coil switch by specific phase sequence output.
3. device according to claim 2, is characterized in that, described electric machine speed regulation module comprises circuit of motor speed regulation control based, pwm control circuit and electric machine speed regulation power conversion unit;
The setting signal of the feedback signal of printed motor and welding wire melting rate is passed through the difference amplifier output speed margin of error to described pwm control circuit by described circuit of motor speed regulation control based;
Described velocity error amount is converted to pwm signal and is input to described electric machine speed regulation power conversion unit thus the wire feed rate or the welding wire melting rate that regulate printed motor by described pwm control circuit.
4. device according to claim 3, is characterized in that, described electric machine speed regulation power conversion unit comprises pulse driving circuit, machine operation ON time circuit and energy consumption of electrical machinery skidding circuit.
5. device according to claim 2, is characterized in that, described motor commutation unit also comprises the communtation protection network be connected with described commutation performance element; Communtation protection network absorbs surge peak voltage when being used for the first coil switch contact commutation and during switching, afterflow avoids contact arc discharge to damage.
6. device according to claim 1, it is characterized in that, described electrical source exchange unit comprises the second coil switch, control the switching of second switch in the second coil switch by the adhesive of the second coil in the second coil switch and disconnection, thus realize the switching between auxiliary power module and arc voltage power module.
7. device according to claim 2, is characterized in that, described welding head also comprises gear reduction box, four-wheel wire feed assembly; Described printed motor connects described gear reduction box, and described gear reduction box connects described four-wheel wire feed assembly, thus ensures to stablize wire feed.
8. device according to claim 7, is characterized in that, the electric installation that described welding head also comprises solder flux bucket, discharge nozzle, welding gun bar and is integrated in below welding head; Described electric installation comprises conducting rod, ignition tip, discharging cover, conductive plate, flux hopper;
Described solder flux bucket connects described flux hopper by discharge nozzle; Described welding gun bar connects described conducting rod, and described ignition tip is arranged on conducting rod end by ignition tip seat, and described conductive plate is arranged on conducting rod top, and described discharging is set on described ignition tip end; Described discharge nozzle adopts detachable connection with the junction of flux hopper.
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| CN106735732B (en) * | 2016-12-30 | 2018-05-08 | 唐山松下产业机器有限公司 | The energy control method and device of consumable electrode high-speed welding |
| CN106695071B (en) * | 2016-12-30 | 2018-09-04 | 唐山松下产业机器有限公司 | Arc start control method and device |
| CN107378202B (en) * | 2017-08-08 | 2023-02-28 | 深圳市佳士科技股份有限公司 | Control system and method for double-pulse wire feeding motor |
| CN108075563B (en) * | 2017-12-18 | 2024-03-26 | 上海电科电器科技有限公司 | Reverse connection braking module of dual power switch control system |
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Effective date of registration: 20170323 Address after: 102200 room A1202, unit A, building, building No. 6, super Road, Changping District science and Technology Park, Beijing Patentee after: BEIJING KUNHEXINGYE TECHNOLOGY CO., LTD. Address before: 102200 room A1202, unit A, building, building No. 6, super Road, Changping District science and Technology Park, Beijing Patentee before: Luo Jiankun |