CN108746944A - The adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase and its control method - Google Patents
The adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase and its control method Download PDFInfo
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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
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
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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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Abstract
The invention discloses a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase and its control methods, the power-supply system includes STM32 human-computer interface modules, host power supply and from electromechanical source, the STM32 human-computer interface modules are connect with host power supply and from the DSP digital coordination control modules in electromechanical source respectively by CAN bus, host power supply provides electric current for preceding silk, and electric current is provided from electromechanical source for rear silk；It host power supply and is made of respectively two main circuits in parallel and control circuit from electromechanical source, the power-supply system can realize 7 kinds of low-and high-frequency impulse phase patterns, high-power twin arc, mariages molten drop are acted on by slave two-way low frequency modulations type dipulse and molten bath is caused to be resonated, optimize the temperature gradient of temperature field of molten pool and reduce twin arc interference, to improve welding process stability, optimization seam organization and improve quality of weld seam molding.
Description
Technical field
The present invention relates to efficient welding technology field, more particularly to high-power mariages pulse MIC welding technical field, specifically
It is related to a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase and its control method.
Background technology
As the important support point of welding technique innovation, high efficiency welding improves deposition effect when being mainly reflected in welding slab
Rate improves quality of weld joint.Realize that efficient welding, key are further increasing for welding current.High-power mariages arteries and veins
One of the major way that MIG welderings are efficient welding is rushed, has clear advantage, welding electricity than traditional mariages pulse MIC welding
The high current (pulse peak current is more than 630A) of source output acts on welding wire, and principal and subordinate's electric arc burns in the same molten bath,
The molten drop that two electric arcs generate project transfers keeps molten bath wide and deep, can significantly improve welding efficiency.But high-power mariages pulse MIC
It welds and uses High-current output, magnetic field intensity increases caused by electric current so that twin arc interaction force increases, and causes serious
Twin arc interferes；High-power mariages pulse MIC welding is big to the heat input of material, therefore causes weld metal zone and heat affected area crystal grain thick
Greatly, the toughness of material is seriously reduced, is heat-treated after some structure weldings, its application is made to be restricted.
High-power mariages pulse MIC welding has broad application prospects in terms of big thick plates, especially one-pass molding
Efficient high-speed welding, for improve mariages pulse MIC welding welding production efficiency open new approach.But high-power mariages arteries and veins
MIG is rushed to weld since distance is closer between mariages, if the electric current rule in conventional Double Wire Welding is applied to high current double wire welding,
The two-way pulse current for only increasing Double Wire Welding, will make twin arc interaction force increase, and be interfered so as to cause twin arc
Seriously, and the bigger interference of power is more serious, and the stability of electric arc is poorer than conventional 630A or less mariages pulse MIC welding, even
Also poorer than monofilament pulse MIC welding, twin arc intermittence current interruption occurs often, causes welding process unstable, cannot achieve ideal
Efficient high-speed welding process.The arc behavior for interfering with each other, interacting between the pulse high current twin arc of short distance
The stability and welding quality of electric arc, droplet transfer and welding process are directly influenced with the droplet transfer.Twin arc interferes shadow
Ringing welding quality becomes the main bottleneck for restricting its popularization and application.
It can be seen that existing high-power mariages pulse MIC welding technology, mainly there is the shortcomings that the following aspects：
(1) high-power mariages pulse MIC welding is big to the heat input of material, causes weld metal zone and heat affected area coarse grains,
The toughness of material is seriously reduced, is heat-treated after some structure weldings, its application is made to be restricted.
(2) high-power mariages pulse MIC welding due between mariages distance it is closer, if by conventional Double Wire Welding electric current advise
Rule is applied to high current double wire welding, i.e., only increases the two-way pulse current of Double Wire Welding merely, then magnetic caused by electric current
Field will accordingly increase so that twin arc interaction force increases, and serious twin arc is caused to interfere, and disturbed condition increases with power
And further increase, the current interruption of twin arc intermittence occurs often, causes welding process unstable, cannot achieve ideal high efficiency
Welding process, welding effect are poorer or even also poorer than monofilament pulse MIC welding than conventional 630A or less mariages pulse MIC weldings, can not
The advantages of embodying high-power double wire welding.
The ripe mariages Pulse MIG Welding Power Source power used is also smaller on the market at present, be substantially all in 630A hereinafter,
Especially domestic, the high-power mariages pulse MIC welding development of 1000A ranks is not also especially ripe；In addition, working as source of welding current work(
Rate the more is done the more big, and the interference problem during Double Wire Welding between twin arc is also more and more serious, and which has limited mariages pulse MICs
Weldering welding current further increases.
The stability of electric arc is to realize the premise of welding process stability, and the stability of electric arc depends in twin arc each
The suffered size disturbed of electric arc and each electric arc itself can bear the ability of disturbance.High-power mariages pulse MIC welding, due to double
Arc current is larger, then the mutual attractive force between twin arc can be larger, and the interference between twin arc can become more serious.
It is to improve electric arc itself to bear the ability of disturbance and improve twin arc phase interaction that twin arc interference optimization, which controls comparatively ideal thought,
Distribution firmly makes the mutual attractive force of twin arc reach minimum；The stability of electric arc is welding condition optimal control
Premise.
Wave control technology plays an important role in optimization electric arc and in terms of the droplet transfer.If mutual for twin arc
Formation mechenism is interfered, corresponding wave control technology is taken, it is likely that reaches and reduces high-power twin arc interference, reach raising
The purpose of welding process stability.Dipulse low frequency modulations are one of the modes of waveform control, are in high frequency single pulse waveforms
On the basis of be modulated again, two kinds of single pulse waveforms are generated one kind of periodically strong and weak pulse current waveform by certain rule
New process.Dipulse slave output current has 10 adjustable parameters respectively：Flash background current Ib1, flash peak value
Electric current Ip1, flash base value time Tb1With flash time to peak Tp1；Weak pulse rushes background current Ib2, weak pulse peak current
Ip2, weak pulse rush base value time Tb2Time to peak T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train current time Tw,
Dipulse has better adjustability for from technique.
Low current value or the small high-frequency impulse group of duty ratio are modulated into the weak pulse punching of low-frequency pulse, high current value or duty
Than the flash that big high-frequency impulse group is modulated into low-frequency pulse, the periodicity of several high frequencies flash group constitutes low frequency arteries and veins
Flash group's current time T of punchings, when the periodicity of the weak impulse train of several high frequencies constitutes the weak impulse train electric current of low-frequency pulse
Between Tw；The periodicity of high frequency power impulse train determines the duty ratio of low-frequency pulse.Low frequency modulations method can be by high-frequency impulse
N-fold lower (n is equal to the sum of the periodicity of high frequency power impulse train), control high frequency flash group periodicity and high frequency weak pulse drop in frequency
Rush group's periodicity ratio can output low frequency pulse duty factor arbitrary value.By the pulse ginseng for modulating two groups of high-frequency impulses
Number makes pulse strength by preset Frequency and periodically switches, to obtain periodically variable strong and weak pulse, while
The electric arc and heat input for making pulse MIC welding change with low frequency modulations frequency and are changed.The stirring action of dual-pulse welding pool
Obviously, dipulse can eliminate weld metal zone columnar dendrite, and gained weld grain is more tiny than single impulse welding seam crystal particle；Dual-pulse
The stirring in molten bath causes molten bath resonance to interrupt continuously growing up for crystal grain, so that primary crystallization is formed by crystallite dimension change
It is small, have the effect of crystal grain thinning, to improve quality of weld seam molding.
It is domestic about the welding of monofilament pulse, the welding of monofilament low frequency modulations type dipulse and the welding of mariages pulse at present
Have more research outside, it is high-power about the research ground zero of high-power mariages pulse MIC welding low frequency modulations type dipulse welding
Mariages pulse MIC welding low frequency modulations type dipulse solder bond high-power mariages pulse MIC welding high efficiency and low frequency modulations type
The advantages of dipulse high quality of weld seam molding.But high-power mariages pulse MIC welding low frequency modulations type dipulse welding at present is ground
Study carefully the adjusting of mainly high-frequency impulse phase, and the research that low-frequency pulse phase is adjusted still belongs to blank.Such as existing skill
In art documents and materials " process characteristic of low frequency modulations type pulse MIC welding method " (Tong Hongjun, intelligence of going up a hill welding,
2001.11), although the welding method can obtain beautiful fish scale-shaped face of weld, expand the range of solderable play movement, effectively
Inhibit the generation of weld blowhole defect, crystal grain thinning to reduce crack sensitivity, but is limited only to the list that peak point current is less than 630A
Silk pulse MIC welding is not mariages pulse MIC welding, and output power is much smaller than the high-power mariages pulse MIC that the present invention is applied
Weldering, can not achieve efficient welding.It is separately found through retrieval, Chinese Patent Application No. is：201510713907.7 entitled：Greatly
Power mariages pulse MIC welding low frequency modulations type dual-pulse power supply system, this application is using in DSP digital coordination control modules
It sets eCAN modules and realizes that the digital coordination between slave controls, to realize synchronous, alternating and random three kinds of low frequency modulations
Type dipulse phase output.But the power-supply system is designed for three kinds of phases of high-frequency impulse, principal and subordinate when system works
Machine is to export flash and weak pulse punching simultaneously, and low frequency phase and high-frequency phase cannot be separately adjustable simultaneously.
Invention content
The purpose of the invention is to overcome shortcoming and deficiency of the existing technology, a kind of low-and high-frequency impulse phase is provided
Adjustable high-power mariages synergic-pulsed MIG welding power-supply system and its control method.
The present invention acts on high-power mariages pulse by the low-and high-frequency modulation type dipulse of different low-and high-frequency impulse phases
MIG welderings process optimizes the electromagnetic force between high-power twin arc to adjust the field strength and distribution situation of twin arc current field
Interaction situation, reduce high-power twin arc and interfere with each other, enhance the controllability of droplet transfer, pass through change mariages electric current
Output phase relationship, enhance melting bath stirring, reduce the occurrence probability of gas hole defect, while optimizing heat input, refine weld metal zone
And heat affected area crystal grain, beautiful scalelike mark weld seam is obtained, to improve welding efficiency and welding process stability, optimization weld seam
Tissue and raising quality of weld seam molding.
First purpose of the present invention is achieved through the following technical solutions：
A kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, including the man-machine boundaries STM32
Face mould block, the STM32 human-computer interface modules are connected by the DSP digital coordination control modules in CAN bus and host power supply
It connects, the host power supply provides electric current for main machine arc load, and the STM32 human-computer interface modules pass through CAN bus and slave
DSP digital coordination control modules connection in power supply, it is described to provide electric current from electromechanical source for slave arc load；
It the host power supply and is composed in parallel respectively by two main circuits from electromechanical source, the host power supply and from electromechanical source
Main circuit one end connect with three-phase alternating current, connect with arc load after other end parallel connection, the main circuit includes input rectifying
Filter module, high-frequency inversion module, power voltage changing module and output rectification filter module；
The topological structure of the main circuit can be according to practical condition, and to be selected as hard switching, phase shifting full bridge soft is opened
Pass or LLC resonance software switch topology one of which；
The control circuit include DSP digital coordinations control module, high-frequency drive module, measure voltage & and
Failure protection module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, the other end and DSP digital coordinations
The ends PWM of control module connect；
One end of the measure voltage & is connect with arc load, and the other end controls mould with DSP digital coordinations
The A/D input terminals of block connect；
One end of the failure protection module is connect with one end of input rectifying filter module, and the other end is digitized with DSP
One end of Collaborative Control module connects；
The STM32 human-computer interface modules are connected with each other with DSP digital coordination control modules.
Preferably, eCAN modules are real built in the STM32 human-computer interface modules and the DSP digital coordinations control module
Existing digital coordination control between host computer and slave computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of patterns.
Preferably, the DSP digital coordinations control module is specially TMS320F28335.
Preferably, the built-in ePWM output modules for generating pwm signal of the DSP digital coordinations control module.
Preferably, the power-supply system adjusts low-and high-frequency impulse phase and 7 kinds of operating modes can be obtained, and is respectively：Low frequency is same
Walk high-frequency synchronous phase pattern, low frequency synchronisation high frequency alternating phase pattern, low frequency synchronisation high frequency random phase pattern, low frequency alternating
High-frequency synchronous phase pattern, low frequency replace high frequency alternating phase pattern, and low frequency replaces high frequency random phase pattern, and low frequency is high at random
Frequency random phase pattern.
When the power-supply system is operated in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse
Phase is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；Phase herein
Under bit pattern, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage from
Machine low-frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak when host low-frequency pulse is in weak stage pulse
Stage pulse；The peak base value of slave high-frequency impulse, which synchronizes, to be occurred, i.e., when host high-frequency impulse is in peak phase, slave is high
Frequency pulse is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；
Low frequency synchronisation phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternately phase
Position base value electric arc interference is small, and the interference of peak value electric arc is big.
When the power-supply system is operated in low frequency synchronisation high frequency alternating phase pattern, slave output current low-frequency pulse phase
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high frequency
The peak base value of pulse is alternately present, i.e., the output of slave high-frequency impulse is exported than host high-frequency impulse in a high-frequency impulse group prolongs
Slow half of high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase makes the temperature difference ladder of temperature field of molten pool
Spend it is larger, high frequency alternating phase then make twin arc annoyance level than locking phase peak value electric arc interfere it is few, and base value electric arc interference
It is larger.
When the power-supply system is operated in low frequency synchronisation high frequency random phase pattern, slave output current low-frequency pulse phase
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, that is, exists
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in one high-frequency impulse group, and slave high-frequency impulse may
Export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is same
Step phase keeps the temperature gradient of temperature field of molten pool larger, and high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase.
When the power-supply system is operated in low frequency alternating high-frequency synchronous phase pattern, the output of slave low frequency pulse current is than master
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, high-frequency impulse phase is same
Step, i.e. high-frequency impulse phase differenceh=0 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, i.e.,
When host low-frequency pulse is in the flash stage, slave low-frequency pulse is in weak stage pulse, otherwise at host low-frequency pulse
Slave low-frequency pulse is in the flash stage when weak stage pulse, and slave low-frequency pulse frequency is equal；But slave
The peak base value of high-frequency impulse, which synchronizes, to be occurred, and slave high-frequency impulse frequency is equal；Low frequency alternating phase makes temperature field of molten pool
Temperature gradient is smaller, and it is small that high-frequency synchronous phase then makes twin arc annoyance level be interfered than alternating phase base value electric arc, and peak value is electric
Arc interference is larger.
When the power-supply system is operated in low frequency alternating high frequency alternating phase pattern, the output of slave low-and high-frequency pulse current
Respectively half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulseh=φl=
180 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, the peak base value arteries and veins of slave high-frequency impulse
Punching is also alternately present, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase make the temperature gradient in temperature field compared with
Small, it is few that high frequency alternating phase then makes twin arc annoyance level be interfered than locking phase pattern peak value electric arc, and base value electric arc interferes
It is larger.
When the power-supply system is operated in low frequency alternating high frequency random phase pattern, the output of slave low frequency pulse current is than master
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, under this phase pattern,
The strong and weak pulse of slave low-frequency pulse is alternately present, and slave low-frequency pulse frequency is equal；But slave high-frequency impulse
Base value or peak value may be exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；It is low
Frequency alternating phase keeps the temperature gradient of temperature field of molten pool smaller, and high frequency random phase then makes peak value electric arc and base value electric arc interfere journey
Degree is between high-frequency synchronous and alternating phase.
When the power-supply system is operated in low frequency random high frequency random phase pattern, the pulse electricity of slave in welding process
Stream output is orthogonal, is all respectively to give independently of each other, between the two not stringent phase relation, slave low frequency arteries and veins
Punching may export simultaneously flash or weak pulse punching, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase with
Machine；Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave is high
Frequency impulse phase is random；Low frequency random phase make the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase it
Between, high frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
Preferably, DSP digital coordinations control module is defeated in ePWM by closed loop control algorithm generation control signal function
Go out module, PWM duty cycle is changed to control the IGBT break-makes of main circuit to protect by dynamic if main circuit uses hard switching
Hold voltage pulse output or electric current；Main electricity is controlled by dynamic regulation PWM phase shifting angles if main circuit is using phase-shifting full-bridge
The IGBT break-makes on road are to keep voltage pulse output or electric current；PFM frequencies are changed by dynamic if main circuit is using LLC resonance
Rate controls the MOSFET break-makes of main circuit to keep voltage pulse output or electric current.
Preferably, when DSP digital coordinations control module controls pulse current and pulse of the low-frequency pulse to high-frequency impulse
Between carry out periodical switching, obtain periodically variable two-way power impulse train, high-power twin arc is periodically variable two
Weld pool surface is acted on rigid electric arc under the power impulse train effect of road, stirring action is generated to molten bath.Stirring action can be eliminated
Weld metal zone columnar dendrite, gained weld grain are more tiny than single impulse welding seam crystal particle；The stirring in dual-pulse molten bath causes to melt
Pond resonance interrupts the continuous of crystal grain and grows up, and becomes smaller to make primary crystallization be formed by crystallite dimension, the effect with crystal grain thinning
Fruit, to improve quality of weld seam molding.
Preferably, mariages molten drop is transitioned into molten bath under the effect of low frequency modulations type dipulse in the form of project transfer, melts
Drop carries a large amount of thermal energy and kinetic energy impact molten bath, generates intense impact effect to molten bath, makees to generate stirring to molten bath
With the frequency of the STM32 human-computer interface modules modulation low frequency modulations type dipulse keeps its frequency range intrinsic with molten bath itself
Frequency range it is close, so that molten bath is generated resonance.
Another object of the present invention is achieved through the following technical solutions：
A kind of control method of the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, including
Following steps：
DSP digital coordinations control module enters after initializing and being communicated with the verification of STM32 human-computer interface modules to be waited for
Machine state；
DSP digital coordinations control module judges the disconnected conjunction of arc welding gun switch, if arc welding gun switch is closed, host in the standby state
Striking signal is sent to slave, then slave enters the striking stage, while the respective size of current of the continuous cycle criterion of slave,
If electric current reaches certain threshold value, the low-and high-frequency impulse phase pattern set according to STM32 human-computer interface modules realizes master respectively
The timing control of the low frequency flash of slave and the switching of weak impulsive switched and high-frequency impulse peak value and base value, while basis
The given double-pulse parameters of STM32 human-computer interface modules realize the current constant control of slave output current.
At the same time, the state of the continuous cycle detection arc welding gun switch of DSP digital coordinations control module, once arc welding gun switch
It disconnects, slave, which enters, after host sends receipts arc signal to slave receives the arc stage, and after the completion of slave receives arc, power-supply system is completed
Welding process, slave enter standby mode.In the standby state, DSP digital coordinations control module constantly detects weldering
Rifle switchs, once detecting that arc welding gun switch is closed, then starts new round welding process.
The present invention has the following advantages and effects with respect to the prior art：
(1) welding efficiency is high.Traditional Double Wire Welding already has larger promotion, high-power mariages pulse compared to monofilament weldering efficiency
MIG welderings are due to using thick welding wire (1.6 or more diameter) to be generated under high current (monofilament peak point current 630A or more) heat effect
Molten drop amount is big, and molten bath is wide and deep, can fill up the groove of big slab weldment quickly, and high-power twin arc fires on a molten bath jointly
It burns, total heat input is much larger than traditional monofilament electric current in 630A Double Wire Welding heat inputs below, it is easy to accomplish one-pass molding is welded
Connect, and traditional Double Wire Welding generally require it is several can just fill up big thick plates groove to tens, layer weld seam, therefore can carry significantly
High speed of welding and deposition efficiency.
(2) temperature gradient for optimizing temperature field of molten pool, in addition greatly reduces high-power twin arc and interferes with each other.It can pass through
Select different low-and high-frequency impulse phase patterns to adjust the temperature gradient of temperature field of molten pool；High-power mariages pulse MIC welding by
Distance is closer between mariages, if the electric current rule in conventional Double Wire Welding is applied to high current double wire welding, i.e., only single
The pure two-way pulse current for increasing Double Wire Welding, then magnetic field caused by electric current will accordingly increase so that twin arc interacts
Power increases, and serious twin arc is caused to interfere, and disturbed condition increases with power and further increased, when twin arc intermittence current interruption
Often occur, cause welding process unstable, cannot achieve ideal efficient welding process, welding effect than conventional 630A with
Lower mariages pulse MIC welding is poor, or even welds worse, the advantages of can not embodying mariages high power welding than single electric arc.The present invention is logical
The adjusting of excessively high low-frequency pulse phase changes the field strength and distribution situation of twin arc current field, optimizes between high-power twin arc
Electromagnetic force interaction situation, reduce high-power twin arc and interfere with each other.
(3) welding quality is high.High-power mariages pulse MIC welding is big to the heat input of material, therefore causes weld metal zone and heat
Zone of influence coarse grains seriously reduce the toughness of material, are heat-treated after some structure weldings, make its application by
Limitation.The present invention acts on high-power mariages pulse MIC welding process by low frequency modulations type dipulse, by changing the defeated of mariages
Go out phase relation, enhance melting bath stirring, reduce the occurrence probability of gas hole defect, while reducing thermal output, refines weld metal zone and heat
Zone of influence crystal grain obtains beautiful scalelike mark weld seam, to improve welding process stability, optimization seam organization and improve weld seam
Forming quality.
Description of the drawings
Fig. 1 is the overall structure block diagram of the present invention；
Fig. 2 (a) is the waveform parameter schematic diagram of the high-frequency impulse of the low frequency modulations type dipulse of the present invention；
Fig. 2 (b) is the waveform parameter schematic diagram of the low-frequency pulse of the low frequency modulations type dipulse of the present invention；
Fig. 3 (a) is the low frequency synchronisation high-frequency synchronous phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (b) is the low frequency synchronisation high frequency alternating phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (c) is the low frequency synchronisation high frequency random phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (d) is the low frequency alternating high-frequency synchronous phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (e) is the low frequency alternating high frequency alternating phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (f) is the low frequency alternating high frequency random phase pattern dipulse waveform diagram of the present invention；
Fig. 3 (g) is the low frequency random high frequency random phase pattern dipulse waveform diagram of the present invention；
Fig. 4 (a) is that the high-frequency direct-current square-wave current waveform of the low frequency modulations type dipulse waveform of the present invention generates schematic diagram；
Fig. 4 (b) is that the middle low-frequency rectangular wave impulse current waveform generation of the low frequency modulations type dipulse waveform of the present invention is shown
It is intended to；
Fig. 5 (a) is the host control program flow chart of the present invention；
Fig. 5 (b) is the slave control program flow diagram of the present invention.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
A kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase and its control as shown in Figure 1
Method processed, including STM32 human-computer interface modules, the STM32 human-computer interface modules pass through in CAN bus and host power supply
DSP digital coordination control modules connect, and the host power supply provides electric current, the man-machine boundaries STM32 for main machine arc load
Face mould block is connect by CAN bus with from the DSP digital coordination control modules in electromechanical source, it is described from electromechanical source be from electromechanics
Arc load provides electric current；
It the host power supply and is composed in parallel respectively by two main circuits from electromechanical source, the host power supply and from electromechanical source
Main circuit one end connect with three-phase alternating current, connect with arc load after other end parallel connection, the main circuit includes input rectifying
Filter module, high-frequency inversion module, power voltage changing module and output rectification filter module；
The control circuit includes DSP digital coordination control modules, high-frequency drive module, measure voltage & and
Failure protection module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, the other end and DSP digital coordinations
The ends PWM of control module connect；
Described measure voltage & one end is connect with arc load, the other end and DSP digital coordination control modules
A/D input terminals connection；
One end of the failure protection module is connect with one end of input rectifying filter module, and the other end is digitized with DSP
One end of Collaborative Control module connects；
The STM32 human-computer interface modules are connected with each other with DSP digital coordination control modules.
Wherein, eCAN modules built in the STM32 human-computer interface modules and the DSP digital coordinations control module are realized
Digital coordination control between host computer and slave computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of patterns.
The operation principle of the present invention：The predetermined output low-and high-frequency of principal and subordinate's electromechanical source is inputted by STM32 human-computer interface modules
Modulation type double-pulse parameters, while DSP digital coordination control modules collect arc voltage by measure voltage &
And welding current signal, the arc voltage and welding electricity that DSP digital coordinations control module gives STM32 human-computer interface modules
Signal is flowed compared with from the collected two-way arc voltage of measure voltage & and welding current signal, by DSP numbers
Word Collaborative Control module closed loop control algorithm generates control signal function in ePWM output modules, is opened firmly if main circuit uses
Guan Ze changes PWM duty cycle to control the IGBT break-makes of main circuit to keep voltage pulse output or electric current by dynamic；If
Main circuit uses phase-shifting full-bridge then to control the IGBT break-makes of main circuit by dynamic regulation PWM phase shifting angles to keep output pulse
Voltage or electric current；PFM frequencies are changed to control the MOSFET break-makes of main circuit by dynamic if main circuit is using LLC resonance
To keep voltage pulse output or electric current.
It should be pointed out that heretofore described slave refers to host and slave, referred to as slave.
The present invention is constantly changed according to coherent pulse parameter by closed loop control algorithm by DSP digital coordinations control module
Duty ratio, phase shifting angle or the PFM frequencies for becoming pwm signal, to change duty ratio, phase shifting angle or the MOSFET of IGBT switching signals
The frequency of switching signal, and then change the output current of power supply, form one high and one low pulse current.Make between reduction twin arc
The firmly influence of welding quality, host power supply and is communicated by STM32 human-computer interface modules by CAN bus between electromechanical source
Adjust the phase duty pattern of principal and subordinate's electromechanical source.
The control method of power-supply system includes the following steps：Slave is inputed to by STM32 human-computer interface modules respectively
Determine low-and high-frequency impulse phase operating mode and low-and high-frequency pulse parameter (flash background current Ib1, flash peak point current Ip1、
Flash base value time Tb1With flash time to peak Tp1；Weak pulse rushes background current Ib2, weak pulse peak current Ip2, weak pulse punching
Base value time Tb2Time to peak T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train current time Tw10 ginsengs in total
Number), DSP digital coordinations control module enters standby shape after initializing and being communicated with the verification of STM32 human-computer interface modules
State.DSP digital coordinations control module judges that arc welding gun switch is disconnected and closes in the standby state, if arc welding gun switch is closed, host to from
Machine sends striking signal, and then slave enters the striking stage, while the respective size of current of the continuous cycle criterion of slave, if electric
Stream reaches certain threshold value, then the low-and high-frequency impulse phase pattern set according to STM32 human-computer interface modules realizes slave respectively
The timing control of low frequency flash and the switching of weak impulsive switched and high-frequency impulse peak value and base value, at the same it is man-machine according to STM32
The given double-pulse parameters of interface module realize the current constant control of slave output current.At the same time, DSP digital coordinations control
The state of the continuous cycle detection arc welding gun switch of molding block, once arc welding gun switch disconnects, host is main after sending receipts arc signal to slave
Slave, which enters, to be received the arc stage, and after the completion of slave receives arc, power-supply system completes a welding process, and slave enters standby shape
State.In the standby state, DSP digital coordinations control module constantly detects arc welding gun switch, once detect that arc welding gun switch is closed,
Then start new round welding process.
The present invention acts on high-power mariages pulse MIC welding process by low-and high-frequency phase modulation-type dipulse, improves big
Interaction force between power twin arc reduces high-power twin arc and interferes with each other, and enhances melting bath stirring, reduces gas hole defect
Occurrence probability, reduce thermal output, refine weld metal zone and heat affected area crystal grain, beautiful scalelike mark weld seam is obtained, to improve
Welding process stability, optimization seam organization and raising quality of weld seam molding.
The high-frequency impulse and low frequency arteries and veins of low frequency modulations type dipulse respectively of the invention as shown in Fig. 2 (a) and Fig. 2 (b)
The waveform parameter schematic diagram of punching.Low frequency modulations type dipulse includes flash group and weak impulse train, flash and weak impulse waveform
Similar with single impulse welding waveform, frequency is higher, referred to as high-frequency impulse；Meanwhile flash group and weak impulse train are respectively as big arteries and veins
Rush the peak value and base value of waveform, the lower macroscopical pulse of overall structure frequency, referred to as low-frequency pulse.It can by Fig. 2 (a) and Fig. 2 (b)
Know, low frequency modulations type dipulse there are 10 parameters for adjusting, they are：Flash background current Ib1, flash peak point current
Ip1, flash background current time Tb1With flash peak current time Tp1；Weak pulse rushes background current Ib2, weak peak value of pulse electricity
Flow Ip2, weak pulse rush background current time Tb2Peak current time T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train
Current time Tw10 parameters in total.
In Fig. 3 (a)-Fig. 3 (g), power-supply system adjusts low-and high-frequency impulse phase and 7 kinds of operating modes can be obtained, and is respectively：
Low frequency synchronisation high-frequency synchronous phase pattern, low frequency synchronisation high frequency alternating phase pattern, low frequency synchronisation high frequency random phase pattern are low
Alternately high-frequency synchronous phase pattern, low frequency replace high frequency alternating phase pattern to frequency, and low frequency replaces high frequency random phase pattern, low frequency
Random high frequency random phase pattern.
When the power-supply system is operated in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse
Phase is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；Phase herein
Under bit pattern, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage from
Machine low-frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak when host low-frequency pulse is in weak stage pulse
Stage pulse；The peak base value of slave high-frequency impulse, which synchronizes, to be occurred, i.e., when host high-frequency impulse is in peak phase, slave is high
Frequency pulse is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；
Low frequency synchronisation phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternately phase
Position base value electric arc interference is small, and the interference of peak value electric arc is big.
When the power-supply system is operated in low frequency synchronisation high frequency alternating phase pattern, slave output current low-frequency pulse phase
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high frequency
The peak base value of pulse is alternately present, i.e., the output of slave high-frequency impulse is exported than host high-frequency impulse in a high-frequency impulse group prolongs
Slow half of high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase makes the temperature difference ladder of temperature field of molten pool
Spend it is larger, high frequency alternating phase then make twin arc annoyance level than locking phase peak value electric arc interfere it is few, and base value electric arc interference
It is larger.
When the power-supply system is operated in low frequency synchronisation high frequency random phase pattern, slave output current low-frequency pulse phase
Position is identical, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low frequency
Pulse frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, that is, exists
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in one high-frequency impulse group, and slave high-frequency impulse may
Export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is same
Step phase keeps the temperature gradient of temperature field of molten pool larger, and high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase.
When the power-supply system is operated in low frequency alternating high-frequency synchronous phase pattern, the output of slave low frequency pulse current is than master
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, high-frequency impulse phase is same
Step, i.e. high-frequency impulse phase differenceh=0 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, i.e.,
When host low-frequency pulse is in the flash stage, slave low-frequency pulse is in weak stage pulse, otherwise at host low-frequency pulse
Slave low-frequency pulse is in the flash stage when weak stage pulse, and slave low-frequency pulse frequency is equal；But slave
The peak base value of high-frequency impulse, which synchronizes, to be occurred, and slave high-frequency impulse frequency is equal；Low frequency alternating phase makes temperature field of molten pool
Temperature gradient is smaller, and it is small that high-frequency synchronous phase then makes twin arc annoyance level be interfered than alternating phase base value electric arc, and peak value is electric
Arc interference is larger.
When the power-supply system is operated in low frequency alternating high frequency alternating phase pattern, the output of slave low-and high-frequency pulse current
Respectively half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulseh=φl=
180 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, the peak base value arteries and veins of slave high-frequency impulse
Punching is also alternately present, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase make the temperature gradient in temperature field compared with
Small, it is few that high frequency alternating phase then makes twin arc annoyance level be interfered than locking phase pattern peak value electric arc, and base value electric arc interferes
It is larger.
When the power-supply system is operated in low frequency alternating high frequency random phase pattern, the output of slave low frequency pulse current is than master
Machine low-frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, under this phase pattern,
The strong and weak pulse of slave low-frequency pulse is alternately present, and slave low-frequency pulse frequency is equal；But slave high-frequency impulse
Base value or peak value may be exported simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；It is low
Frequency alternating phase keeps the temperature gradient of temperature field of molten pool smaller, and high frequency random phase then makes peak value electric arc and base value electric arc interfere journey
Degree is between high-frequency synchronous and alternating phase.
When the power-supply system is operated in low frequency random high frequency random phase pattern, the pulse electricity of slave in welding process
Stream output is orthogonal, is all respectively to give independently of each other, between the two not stringent phase relation, slave low frequency arteries and veins
Punching may export simultaneously flash or weak pulse punching, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase with
Machine；Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave is high
Frequency impulse phase is random；Low frequency random phase make the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase it
Between, high frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
The high-frequency direct-current square wave of low frequency modulations type dipulse waveform respectively of the invention as shown in Fig. 4 (a) and Fig. 4 (b)
Current waveform and middle low-frequency rectangular wave impulse current waveform generate schematic diagram.By taking hard switching main circuit as an example, low frequency modulations type is double
Impulse waveform generate basic functional principle be：Three-phase alternating current is rectified become direct current after be reverse into inverter
The high-frequency ac square wave current of 20kHz, then by becoming high-frequency direct-current square wave current after Transformer Rectifier, the high-frequency direct-current square wave
Electric current is finally converted into middle low-frequency rectangular wave impulse electric current after inductor filter.Must be subject to, it is emphasized that output current it is big
Small related with duty ratio, duty ratio is bigger, and electric current is bigger；Duty ratio is smaller, and electric current is smaller.Therefore, changing duty ratio size is
Changeable output current size.Based on this principle it is found that the duty ratio for passing through change pulse current, you can output current is allowed to become
Become smaller greatly, forms the middle low-frequency rectangular wave impulse electric current of 1~200Hz.In fact, exactly DSP programs are according to coherent pulse parameter
The duty ratio for constantly changing pwm signal to change IGBT switching signal duty ratios, and then changes the output current of power supply, shape
At one high and one low middle low-frequency rectangular wave impulse electric current.The realization principle of total impulse waveform is to be realized with DSP internal processes
Pulse width modulation to 20kHz high frequency carrier waveforms, filter inductance then realize the demodulation to modulation waveform, finally obtain full
Low frequency modulations type dipulse waveform needed for sufficient welding procedure.
Host control method flow chart respectively of the invention and slave control method stream as shown in Fig. 5 (a) and Fig. 5 (b)
Cheng Tu.Low frequency modulations type double PMIG welding welding wave parameter includes flash background current Ib1, flash peak point current Ip1, strong arteries and veins
Rush background current time Tb1With flash peak current time Tp1；Weak pulse rushes background current Ib2, weak pulse peak current Ip2, it is weak
Pulse background current time Tb2Peak current time T is rushed with weak pulsep2；Flash group's current time TsWith weak impulse train current time
Tw10 parameters in total.Host low frequency modulations type dipulse generates mainly realizes low frequency modulations type dipulse by timer T2
Switching.For the course of work of slave by host computer control, slave waveform switch is also the strong and weak impulse phase sended over according to host
Mode signal realizes the switching of low-and high-frequency impulse waveform.The strong and weak impulse phase mode signal that host is sent contains low-and high-frequency arteries and veins
Rush the state in each stage, slave then continually scans for the strong and weak impulse phase mode signal of host transmission, and according to receiving
Strong and weak impulse phase mode signal realizes the output of low-and high-frequency pulse.10 parameters of low frequency modulations type double PMIG welding welding wave,
It is all given by STM32 human-computer interface modules, for ease of using, these parameters will carry out to a certain degree in pulse parameter calculating
Conversion.
The control method of the power-supply system includes the following steps：DSP digital coordination control modules by initialization and with
Enter standby mode after the verification communication of STM32 human-computer interface modules.DSP digital coordinations control module judges in the standby state
Arc welding gun switch is disconnected to be closed, if arc welding gun switch is closed, host sends striking signal to slave, and then slave enters the striking stage, together
When slave continuous cycle criterion respectively size of current is set if electric current reaches certain threshold value according to STM32 human-computer interface modules
Fixed low-and high-frequency impulse phase pattern realize respectively the flash of slave low frequency and weak impulsive switched and high-frequency impulse peak value and
The timing control of base value switching, while realizing slave output electricity according to the double-pulse parameters that STM32 human-computer interface modules give
The current constant control of stream.At the same time, the state of the continuous cycle detection arc welding gun switch of DSP digital coordinations control module, once weldering
Rifle switch disconnects, and slave, which enters, after host sends receipts arc signal to slave receives the arc stage, and after the completion of slave receives arc, system is complete
At a welding process, slave enters standby mode.In the standby state, DSP digital coordinations control module constantly detects
Arc welding gun switch then starts new round welding process once detecting that arc welding gun switch is closed.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications,
Equivalent substitute mode is should be, is included within the scope of the present invention.
Claims (10)
1. a kind of adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, which is characterized in that the electricity
Source system includes STM32 human-computer interface modules, host power supply and from electromechanical source,
The host power supply provides electric current for main machine arc load, described to provide electric current from electromechanical source for slave arc load；Institute
It states host power supply and is made of respectively two main circuits and control circuit in parallel from electromechanical source, wherein every main circuit one end
It connect with three-phase alternating current, is connect with arc load after other end parallel connection, every main circuit includes the input rectifying filter being linked in sequence
Wave module, high-frequency inversion module, power voltage changing module and output rectification filter module；
Every control circuit includes DSP digital coordinations control module, high-frequency drive module, measure voltage & and failure
Protection module；
One end of the high-frequency drive module is connect with one end of high-frequency inversion module, and the other end is controlled with DSP digital coordinations
The ends PWM of module connect；
One end of the measure voltage & is connect with arc load, the other end and DSP digital coordination control modules
A/D input terminals connect；
One end of the failure protection module is connect with one end of input rectifying filter module, the other end and DSP digital coordinations
One end of control module connects；
The STM32 human-computer interface modules are connected with the DSP digital coordination control modules in host power supply respectively by CAN bus
It connects, the STM32 human-computer interface modules are connected with from the DSP digital coordination control modules in electromechanical source respectively by CAN bus
It connects.
2. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the topology of the main circuit is hard switching, phase shifting full bridge soft switch or LLC resonance software switch topologies.
3. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, eCAN modules built in the STM32 human-computer interface modules and the DSP digital coordinations control module are realized upper
Digital coordination control between machine and slave computer, to realize the low-and high-frequency dipulse phase output of 7 kinds of patterns.
4. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the built-in ePWM output modules for generating pwm signal of the DSP digital coordinations control module.
5. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the DSP digital coordinations control module uses TMS320F28335.
6. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 3,
It is characterized in that, the low-and high-frequency dipulse phase output of 7 kinds of patterns is respectively：It is low frequency synchronisation high-frequency synchronous phase pattern, low
The synchronous high frequency alternating phase pattern of frequency, low frequency synchronisation high frequency random phase pattern, low frequency alternating high-frequency synchronous phase pattern, low frequency
Alternately high frequency alternating phase pattern, low frequency alternating high frequency random phase pattern, low frequency random high frequency random phase pattern, wherein
When the power-supply system is operated in low frequency synchronisation high-frequency synchronous phase pattern, slave output off current HIGH low-frequency pulse phase
It is identical, i.e. low-and high-frequency pulse phase difference φh=φl=0 °, and slave low-and high-frequency pulse frequency difference is equal；In this phase mode
Under formula, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, i.e., when host low-frequency pulse is in the flash stage, slave is low
Frequency pulse is in the flash stage, otherwise slave low-frequency pulse is in weak pulse punching when host low-frequency pulse is in weak stage pulse
Stage；The peak base value of slave high-frequency impulse, which synchronizes, to be occurred, i.e. the slave high frequency arteries and veins when host high-frequency impulse is in peak phase
Punching is in peak phase, otherwise slave high-frequency impulse is in the base value stage when host high-frequency impulse is in the base value stage；Low frequency
Locking phase keeps the temperature gradient of temperature field of molten pool larger, and high-frequency synchronous phase then makes twin arc annoyance level than alternating phase base
It is small to be worth electric arc interference, and the interference of peak value electric arc is big；
When the power-supply system is operated in low frequency synchronisation high frequency alternating phase pattern, slave output current low-frequency pulse phase phase
Together, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low-frequency pulse
Frequency is equal；But slave high-frequency impulse phase alternation, i.e. high-frequency impulse phase differenceh=180 °, slave high-frequency impulse
Peak base value be alternately present, i.e., the output of slave high-frequency impulse is than host high-frequency impulse output delay half in a high-frequency impulse group
A high-frequency impulse period, and slave high-frequency impulse frequency is equal；Low frequency synchronisation phase make the temperature gradient of temperature field of molten pool compared with
Greatly, high frequency alternating phase then makes twin arc annoyance level be interfered than locking phase peak value electric arc few, and the interference of base value electric arc is larger；
When the power-supply system is operated in low frequency synchronisation high frequency random phase pattern, slave output current low-frequency pulse phase phase
Together, i.e. low-frequency pulse phase differencel=0 °, the strong and weak impulsive synchronization of slave low-frequency pulse occurs, and slave low-frequency pulse
Frequency is equal；But slave high-frequency impulse phase is random, the peak base value of slave high-frequency impulse occurs at random, i.e., at one
The output of slave high-frequency impulse is random with host high-frequency impulse output phase in high-frequency impulse group, and slave high-frequency impulse may be simultaneously
Export base value or peak value, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency synchronisation phase
Position keeps the temperature gradient of temperature field of molten pool larger, and high frequency random phase then makes peak value electric arc and base value electric arc annoyance level in high frequency
Between synchronous and alternating phase；
When the power-supply system is operated in low frequency alternating high-frequency synchronous phase pattern, the output of slave low frequency pulse current is lower than host
Frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, high-frequency impulse Phase synchronization, i.e.,
High-frequency impulse phase differenceh=0 °, under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, that is, works as master
Slave low-frequency pulse is in weak stage pulse when machine low-frequency pulse is in the flash stage, otherwise when host low-frequency pulse is in weak
Slave low-frequency pulse is in the flash stage when stage pulse, and slave low-frequency pulse frequency is equal；But slave high frequency
The peak base value of pulse, which synchronizes, to be occurred, and slave high-frequency impulse frequency is equal；Low frequency alternating phase makes the temperature difference of temperature field of molten pool
Gradient is smaller, and it is small that high-frequency synchronous phase then makes twin arc annoyance level be interfered than alternating phase base value electric arc, and peak value electric arc is dry
It disturbs larger；
When the power-supply system is operated in low frequency alternating high frequency alternating phase pattern, slave low-and high-frequency pulse current output difference
Half of low-and high-frequency pulse period of delay, i.e. low-and high-frequency pulse phase difference φ are exported than host low-and high-frequency pulseh=φl=180 °,
Under this phase pattern, the strong and weak pulse of slave low-frequency pulse is alternately present, and the peak base value pulse of slave high-frequency impulse is also handed over
For appearance, and slave low-and high-frequency pulse frequency difference is equal；Low frequency alternating phase keeps the temperature gradient in temperature field smaller, high frequency
It is few that alternating phase then makes twin arc annoyance level be interfered than locking phase pattern peak value electric arc, and the interference of base value electric arc is larger；
When the power-supply system is operated in low frequency alternating high frequency random phase pattern, the output of slave low frequency pulse current is lower than host
Frequency pulse output half of low-frequency pulse period of delay, i.e. low-frequency pulse phase differencel=180 °, under this phase pattern, principal and subordinate
The strong and weak pulse of machine low-frequency pulse is alternately present, and slave low-frequency pulse frequency is equal；But slave high-frequency impulse may
Export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave high-frequency impulse phase is random；Low frequency is handed over
Keep the temperature gradient of temperature field of molten pool smaller for phase, high frequency random phase then makes peak value electric arc and base value electric arc annoyance level exist
Between high-frequency synchronous and alternating phase；
When the power-supply system is operated in low frequency random high frequency random phase pattern, the pulse current of slave is defeated in welding process
Go out orthogonal, is all respectively given, not stringent phase relation between the two, slave low-frequency pulse can independently of each other
Flash or weak pulse punching can be exported simultaneously, it is also possible to strong and weak pulse alternating state, and slave low-frequency pulse phase is random；It is main
Slave high-frequency impulse may export base value or peak value simultaneously, it is also possible to base value and peak value alternating state, and slave high frequency arteries and veins
It is random to rush phase；Low frequency random phase makes the temperature gradient of temperature field of molten pool between low frequency synchronisation phase and alternating phase,
High frequency random phase then makes twin arc annoyance level between high-frequency synchronous and alternating phase.
7. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 3,
It is characterized in that, the DSP digital coordinations control module generates control signal function by closed loop control algorithm and exported in ePWM
Module changes PWM duty cycle to control the IGBT break-makes of main circuit to keep if main circuit uses hard switching by dynamic
Voltage pulse output or electric current；Main circuit is controlled by dynamic regulation PWM phase shifting angles if main circuit is using phase-shifting full-bridge
IGBT break-makes to keep voltage pulse output or electric current；PFM frequencies are changed by dynamic if main circuit is using LLC resonance
To control the MOSFET break-makes of main circuit to keep voltage pulse output or electric current.
8. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, peak point current and burst length of the DSP digital coordinations control module control low-frequency pulse to high-frequency impulse
Periodical switching is carried out, obtains periodically variable two-way power impulse train, high-power twin arc is in periodically variable two-way
Weld pool surface is acted on rigid electric arc under strong and weak impulse train effect, stirring action is generated to molten bath.
9. the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase according to claim 1,
It is characterized in that, the frequency of the STM32 human-computer interface modules modulation low frequency modulations type dipulse makes its frequency range and molten bath certainly
The intrinsic frequency range of body is close, and molten bath is made to generate resonance.
10. a kind of control method of the adjustable high-power mariages synergic-pulsed MIG welding power-supply system of low-and high-frequency impulse phase, feature
It is, the control method includes the following steps：
DSP digital coordinations control module enters standby shape after initializing and being communicated with the verification of STM32 human-computer interface modules
State；
DSP digital coordinations control module judges that arc welding gun switch is disconnected and closes in the standby state, if arc welding gun switch is closed, host to from
Machine sends striking signal, and then slave enters the striking stage, while the respective size of current of the continuous cycle criterion of slave, if electric
Stream reaches certain threshold value, then the low-and high-frequency impulse phase pattern set according to STM32 human-computer interface modules realizes slave respectively
Low frequency flash and weak impulsive switched and high-frequency impulse peak value and base value switching timing control, while according to STM32 people
The given low-and high-frequency double-pulse parameters of machine interface module realize the current constant control of slave output current, wherein the low-and high-frequency
Double-pulse parameters include flash background current Ib1, flash peak point current Ip1, flash base value time Tb1With flash peak value
Time Tp1；Weak pulse rushes background current Ib2, weak pulse peak current Ip2, weak pulse rush base value time Tb2Time to peak is rushed with weak pulse
Tp2；Flash group's current time TsWith weak impulse train current time Tw；
The state of the continuous cycle detection arc welding gun switch of DSP digital coordination control modules, once arc welding gun switch disconnect, host to from
Slave enters the receipts arc stage after machine sends receipts arc signal, and after the completion of slave receives arc, power-supply system completes a welding process,
Slave enters standby mode；In the standby state, DSP digital coordinations control module constantly detects arc welding gun switch, once inspection
Arc welding gun switch closure is measured, then starts new round welding process.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203610A (en) * | 2020-01-14 | 2020-05-29 | 华南理工大学 | Double-wire median pulse MIG welding power supply system and control method thereof |
| CN111975178A (en) * | 2020-07-17 | 2020-11-24 | 华南理工大学 | Welding pool balanced oscillation pulse deep-melting lockhole TIG welding system and welding method thereof |
| CN112008196A (en) * | 2020-07-22 | 2020-12-01 | 武汉理工大学 | Composite pulse welding method, welding system, welding machine and application |
| CN112388118A (en) * | 2020-10-29 | 2021-02-23 | 唐山松下产业机器有限公司 | Current control method and device for double-wire pulse welding, electronic equipment and storage medium |
| CN113059256A (en) * | 2021-04-02 | 2021-07-02 | 唐山松下产业机器有限公司 | Welding control method, system, equipment and storage medium of double-wire welding system |
| CN113661025A (en) * | 2019-04-10 | 2021-11-16 | 弗罗纽斯国际有限公司 | Multi-pulse welding method |
| CN115609111A (en) * | 2022-12-19 | 2023-01-17 | 宁波芯合为一电子科技有限公司 | Control method for self-adaptive adjustment of temperature of pulse welding power supply and pulse welding power supply |
| CN115883049A (en) * | 2022-11-30 | 2023-03-31 | 深圳市云天数字能源有限公司 | Signal synchronization method and device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6051810A (en) * | 1998-01-09 | 2000-04-18 | Lincoln Global, Inc. | Short circuit welder |
| JP2001287031A (en) * | 2000-03-31 | 2001-10-16 | Daihen Corp | Control method and welding equipment for multiple electrode pulse arc welding |
| JP2003103368A (en) * | 2001-09-26 | 2003-04-08 | Daihen Corp | Method for controlling multiple electrode pulse arc welding process and welding equipment |
| JP2012166247A (en) * | 2011-02-16 | 2012-09-06 | Daihen Corp | Two-wire welding control method |
| CN105269117A (en) * | 2015-10-27 | 2016-01-27 | 华南理工大学 | High-power double-wire pulse MIG welding low-frequency modulation type double-pulse control system |
-
2018
- 2018-07-18 CN CN201810789022.9A patent/CN108746944B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6051810A (en) * | 1998-01-09 | 2000-04-18 | Lincoln Global, Inc. | Short circuit welder |
| JP2001287031A (en) * | 2000-03-31 | 2001-10-16 | Daihen Corp | Control method and welding equipment for multiple electrode pulse arc welding |
| JP2003103368A (en) * | 2001-09-26 | 2003-04-08 | Daihen Corp | Method for controlling multiple electrode pulse arc welding process and welding equipment |
| JP2012166247A (en) * | 2011-02-16 | 2012-09-06 | Daihen Corp | Two-wire welding control method |
| CN105269117A (en) * | 2015-10-27 | 2016-01-27 | 华南理工大学 | High-power double-wire pulse MIG welding low-frequency modulation type double-pulse control system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113661025B (en) * | 2019-04-10 | 2023-07-21 | 弗罗纽斯国际有限公司 | Multi-pulse welding method |
| CN113661025A (en) * | 2019-04-10 | 2021-11-16 | 弗罗纽斯国际有限公司 | Multi-pulse welding method |
| CN111203610A (en) * | 2020-01-14 | 2020-05-29 | 华南理工大学 | Double-wire median pulse MIG welding power supply system and control method thereof |
| CN111203610B (en) * | 2020-01-14 | 2021-11-23 | 华南理工大学 | Double-wire median pulse MIG welding power supply system and control method thereof |
| CN111975178A (en) * | 2020-07-17 | 2020-11-24 | 华南理工大学 | Welding pool balanced oscillation pulse deep-melting lockhole TIG welding system and welding method thereof |
| CN111975178B (en) * | 2020-07-17 | 2024-03-26 | 华南理工大学 | Molten pool balance oscillation pulse deep-melting locking hole TIG welding system and welding method thereof |
| CN112008196A (en) * | 2020-07-22 | 2020-12-01 | 武汉理工大学 | Composite pulse welding method, welding system, welding machine and application |
| CN112388118A (en) * | 2020-10-29 | 2021-02-23 | 唐山松下产业机器有限公司 | Current control method and device for double-wire pulse welding, electronic equipment and storage medium |
| CN113059256A (en) * | 2021-04-02 | 2021-07-02 | 唐山松下产业机器有限公司 | Welding control method, system, equipment and storage medium of double-wire welding system |
| CN115883049A (en) * | 2022-11-30 | 2023-03-31 | 深圳市云天数字能源有限公司 | Signal synchronization method and device |
| CN115609111A (en) * | 2022-12-19 | 2023-01-17 | 宁波芯合为一电子科技有限公司 | Control method for self-adaptive adjustment of temperature of pulse welding power supply and pulse welding power supply |
| CN116021122A (en) * | 2023-01-30 | 2023-04-28 | 华南理工大学 | SiC power device-based local dry underwater fast-frequency MIG welding method |
| CN116021122B (en) * | 2023-01-30 | 2024-04-26 | 华南理工大学 | SiC power device-based local dry underwater fast-frequency MIG welding method |
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