CN103182584A - Arc striking control method of consumable electrode arc welding - Google Patents
Arc striking control method of consumable electrode arc welding Download PDFInfo
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- CN103182584A CN103182584A CN2012105677442A CN201210567744A CN103182584A CN 103182584 A CN103182584 A CN 103182584A CN 2012105677442 A CN2012105677442 A CN 2012105677442A CN 201210567744 A CN201210567744 A CN 201210567744A CN 103182584 A CN103182584 A CN 103182584A
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Abstract
The invention provides an arc striking control method of consumable electrode arc welding. When welding of the consumable electrode arc welding begins, the method makes electric arc rapidly and smoothly shift to stable state after the electric arc is generated. In the arc striking control method of consumable electrode arc welding, at the beginning of welding, under a condition that welding current (Iw) is powered on (time T2), a value of a voltage setting signal (Vr) is set AS a trigger voltage setting value (Vsr) which is larger than a stable voltage set value (Vcr) in a first period (T1), and the voltage setting signal (Vr) is set as the stable voltage set value (Vcr) in a continuous stable period (after time t5). Through constant voltage control, the welding current (Iw) is powered on. The first time (T1) is ended at the time when welding voltage estimated values (Vw) increase to be equal to the trigger voltage setting value (Vsr). Therefore, since the first period should be ended after an arc length reaches a targeted arc length, welding solder wires and base metal can be properly input with heat and smoothly shift to stable states.
Description
Technical field
The present invention relates to obtain the striking control method of the sacrificial electrode arc welding of the good starting the arc.
Background technology
In the invention of patent fraction 1, in approximate period ground repeats sacrificial electrode arc welding that electric arc and short circuit weld, be set with following during: the constant current control period, the molten size of carrying out short circuiting transfer that hot exposure (hot start) electric current of energising regulation during after the electric arc starting tens of milliseconds, formation can make the front end at the welding welding wire form; During constant voltage control high voltage was set, during ensuing hundreds of ms, the energising weldingvoltage was controlled the welding current that produces than the constant voltage of the high several v of stable weldingvoltage and is enlarged arc length; During the constant voltage control low voltage set, further during ensuing hundreds of ms, control the welding current that produces by the energising weldingvoltage than the constant voltage of the low several v of stable weldingvoltage, shorten arc length, thereby make it carry out the repetition period of electric arc and short circuit regularly; And during the setting of constant voltage control burning voltage, the welding current of the constant voltage control that the stable weldingvoltage that the energising arc length does not become too short produces makes it carry out the cycle of electric arc and short circuit regularly.Because by carrying out the striking control method of this sacrificial electrode arc welding, can suppress the short circuit that produces in the transition period after the starting the arc and the irregular state repeatedly of electric arc, so can obtain the good starting the arc.
The prior art document
Patent documentation
Patent documentation 1: Japanese patent laid-open 7-204848 communique
Summary of the invention
In above-mentioned prior art in the past, during setting, above-mentioned constant voltage control high voltage is set to setting.Action effect during this constant voltage control high voltage is set is that arc length is elongated till the target arc length corresponding with the weldingvoltage higher than stable weldingvoltage.By than elongating arc length between stationary phase, welding welding wire and mother metal in suitable fusion state under produce short circuit.As above such, the cycle of short circuit and electric arc is in stable stateization in advance, can obtain the good starting the arc.
But, the cambic change of arc length is because distance between state, joint geometry, power supply tip (tip) and the mother metal in the size of the molten ball of the welding welding wire front end before the welding beginning, molten bath, the influence of variable of stablizing the setting value etc. of weldingvoltage change.Its result during the constant voltage control high voltage of regulation is set, produces the situation that arc length stops during under the state of miss the mark arc length.Conversely, reached the target arc length in advance because arc length changes rapidly, under this state, continued than long till stopping during the setting of constant voltage control high voltage thereby become.If be in such state, then the heat input to welding welding wire and mother metal becomes too small or too much, and the starting the arc degenerates.
Therefore, provide the striking control method of following sacrificial electrode arc welding in the present invention: no matter the influence of above-mentioned variable, suitably change during all can making when starting the arc arc length elongated between temporarily than stationary phase, and can obtain its successful starting the arc.
In order to solve above-mentioned problem, in a first aspect of the present invention, a kind of striking control method of sacrificial electrode arc welding, when the welding beginning, under the situation that welding current begins to switch on, during the first that the voltage setting signal value of being set at is big than burning voltage setting value starting voltage sets value, in between ensuing stationary phase described voltage setting signal being set at described burning voltage sets value, and control the welding current of switching on by constant voltage, the striking control method of this sacrificial electrode arc welding is characterised in that, becomes the time point that equates with described starting voltage setting value in the increase of weldingvoltage detected value and stops between the described first phase.
In a second aspect of the present invention, striking control method as the described sacrificial electrode arc welding of a first aspect of the present invention, it is characterized in that, increase and become with described starting voltage setting value and to equate and passed through the time point of the timing period of predesignating from this time point at described weldingvoltage detected value, stop between the described first phase.
In a third aspect of the present invention, striking control method as the present invention first or the described sacrificial electrode arc welding of second aspect, it is characterized in that, the hot exposure electric current of controlling to switch on and predesignating by constant current in during this hot exposure is set before between the described first phase during the hot exposure of predesignating.
In a fourth aspect of the present invention, striking control method as the described sacrificial electrode arc welding in the present invention first to the 3rd any aspect, it is characterized in that, after between the described first phase be set the second phase, this second phase is set at the time span that multiply by the coefficient gained of having predesignated between the described first phase, and, in this second phase, set described voltage setting signal in the mode that reduces to described burning voltage set-point ramp shape ground from described starting voltage setting value.
According to the present invention, become the time point that equates with the value starting voltage setting value bigger than the burning voltage setting value increasing with the proportional weldingvoltage detected value of arc length, between the end first phase.Therefore, according to distance between state, joint geometry, power supply tip and the mother metal in the size of the molten ball of the welding welding wire front end before the welding beginning, molten bath, the influence of variable of stablizing the setting value etc. of weldingvoltage, even the pace of change of arc length produces change, also must reach target arc length (starting voltage setting value) at arc length (weldingvoltage detected value) and stop between the first phase afterwards.Therefore, produce after the electric arc, welding welding wire and mother metal are carried out suitable heat input, can obtain the good starting the arc.
Description of drawings
Fig. 1 is the sequential chart that the striking control method of the sacrificial electrode arc welding that embodiments of the present invention relate to is shown.
Fig. 2 is the block diagram for the source of welding current of the striking control method of implementing the sacrificial electrode arc welding that embodiments of the present invention relate to.
Symbol description
1 welding welding wire
2 mother metals
3 electric arcs
4 welding torches
5 feed rolls
The CD judging circuit of switching on
The Cd judgment signal of switching on
CS control mode switching signal generative circuit
Cs control mode switching signal
The DV drive circuit
Dv drives signal
The Ea error amplification signal
EI current error amplifying circuit
Ei current error amplifying signal
EV voltage error amplifying circuit
Ev voltage error amplifying signal
FC feeding control circuit
Fc feeding control signal
FR feed speed initialization circuit
Fr feed speed setting signal
The Fw feed speed
ID welding current testing circuit
Id welding current detection signal
Ih hot exposure electric current
IHR hot exposure current setting circuit
Ihr hot exposure current settings signal
The Iw welding current
The LD arc length arrives judging circuit
Ld arc length arriving signal
Initialization circuit during the MS
Setting signal during the Ms
The PM electric power main circuit
The RC robot controller
St welds commencing signal
SW controls commutation circuit
T1 is between the first phase
The T2 second phase
The Td timing period
TDR timing period initialization circuit
Tdr timing period setting signal
During the Th hot exposure
Initialization circuit during the THR hot exposure
Setting signal during the Thr hot exposure
VAV weldingvoltage filter circuit
Vav weldingvoltage filtering signal
VCR burning voltage initialization circuit
The Vcr burning voltage is set (signal/value)
VD weldingvoltage testing circuit
Vd weldingvoltage detection signal
The VR voltage setting circuit
The Vr voltage setting signal
VSR starting voltage initialization circuit
The Vsr starting voltage is set (signal/value)
The Vw weldingvoltage
The WM feed motor
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
Fig. 1 is the sequential chart that the striking control method of the sacrificial electrode arc welding that embodiments of the present invention relate to is shown.This figure (A) illustrates welding commencing signal St, this figure (B) illustrates control mode switching signal Cs, this figure (C) illustrates the feed speed Fw of welding welding wire, this figure (D) illustrates arc length arriving signal Ld, this figure (E) illustrates voltage setting signal Vr, this figure (F) illustrates welding current Iw, and this figure (G) illustrates weldingvoltage Vw.This figure illustration used the situation of the welding of robot.Below, describe with reference to this figure.
In moment t1, move and when making welding torch arrive the welding initial position in robot, from robot controller to source of welding current output welding commencing signal St.
(1) during the deceleration feeding of t1～t2 constantly
Shown in this figure (A), in moment t1, when the welding commencing signal St from robot controller becomes high level, because the source of welding current begins output, so shown in this figure (G), non-load voltage is applied between welding welding wire and the mother metal.Simultaneously, shown in this figure (C), feed speed Fw becomes the slow deceleration feed speed about 1～2m/min, and welding welding wire and mother metal move closer to.Shown in this figure (B), control mode switching signal Cs becomes low level (constant current control) till moment t3, after this becomes high level (constant voltage control).This control mode switching signal Cs is the signal that the mode of the output control of the source of welding current is switched to constant current control or constant voltage control.Shown in this figure (D), arc length arriving signal Ld is following signal, becomes low level till moment t31 that is:, becomes high level in constantly during t31～t4, after this becomes low level.This arc length arriving signal Ld is when arc length reaches the target arc length, becomes the signal of high level.Shown in this figure (E), voltage setting signal Vr became starting voltage setting value Vsr before moment t4, reduce with slope (slope) shape to burning voltage setting value Vcr from starting voltage setting value Vsr in during moment t4～t5, after this become burning voltage setting value Vcr.Starting voltage setting value Vsr is set linkedly with burning voltage setting value Vcr, is set to than the value about the big 2～5v of burning voltage setting value Vsr.So that becoming the mode of appropriate value, arc length sets burning voltage setting value Vcr according to the kind of welding welding wire, feed speed etc.Therefore, the arc length the when arc length during starting voltage setting value Vsr sets value Vcr than burning voltage becomes long, and this arc length becomes the target arc length.
(2) Th during the hot exposure of t2～t3 constantly
In moment t2, contact with mother metal and during conducting, shown in this figure (G), weldingvoltage Vw sharply is reduced to the short-circuit voltage value about several v at the welding welding wire.Simultaneously, shown in this figure (F), the energising of welding current Iw begins, and among the Th, the hot exposure electric current I h that predesignates switches on during the hot exposure of predesignating of moment t2～t3.During this hot exposure, among the Th, shown in this figure (B), because control mode switching signal Cs is low level, control so become constant current.Th is set to about 5～15ms during the hot exposure, and hot exposure electric current I h is set to about 450～600A.Two values according to the kind of welding welding wire, stablize feed speed etc. and all be set to appropriate value.In moment t2, when the energising of welding current Iw began, shown in this figure (C), feed speed Fw was switched to the stable feed speed of having predesignated.This hot exposure electric current I h is for the front end of fusion weld welding wire in advance and produce electric arc and switch on.Therefore, the moment t21 after the short time from about moment t2 process 1ms produces electric arc.When electric arc produced, shown in this figure (G), weldingvoltage Vw sharply was increased to the arc voltage value of tens of v.During moment t21～t3, front end is melted because hot exposure electric current I h makes the welding welding wire, so arc length is elongated gradually.Corresponding therewith, shown in this figure (G), weldingvoltage Vw its value during moment t21～t3 becomes big gradually.Th during this hot exposure, be not the sin qua non arrange necessary during.Even between the first phase of adopting when having contacted with mother metal following item to describe from the welding welding wire during the T1 short circuit because the welding current Iw of current value switches on greatly, so when electric arc produces, or not such problem according to welding condition.
(3) T1 between the first phase of moment t3～t4
In moment t3, when Th stopped during hot exposure, shown in this figure (B), control mode switching signal Cs was changed to high level, switched to constant voltage control.Shown in this figure (E), because be starting voltage setting value Vsr in the value of the voltage setting signal Vr of moment t3 time point, so carry out constant voltage control according to this setting value.Shown in this figure (G), weldingvoltage Vw increases so control the value of being somebody's turn to do by constant voltage gradually because be than in the moment t3 time point little value of value corresponding with starting voltage setting value Vsr.Be accompanied by this situation, arc length is also little by little elongated.And in moment t31, shown in this figure (G), the value of weldingvoltage Vw equates with the value that sets value Vsr corresponding to starting voltage.Corresponding therewith, shown in this figure (D), arc length arriving signal Ld is changed to high level, and continues till moment t4.That is, in moment t31, arc length reaches the target arc length.From this moment t31 to the moment t4 through the timing period Td that predesignated, shown in this figure (E), voltage setting signal Vr keeps starting voltage setting value Vsr constant, shown in this figure (G), it is constant that value maintenance and the starting voltage of weldingvoltage Vw sets value the corresponding value of Vsr, and it is constant that arc length is maintained at the target arc length.Shown in this figure (F), welding current Iw becomes in the moment t3 value that has sharply reduced from hot exposure electric current I h.Timing period Td is set to appropriate value in the scope of 0～10ms.It is the situation that timing period is not set when Td=0.This timing period Td is set to appropriate value according to kind, welding, joint geometry and the speed of welding etc. of welding welding wire.Constantly T1 is not specified time limit as mentioned above between the first phase of t3～t4, and become Th during hot exposure stop time be carved into arc length before arriving the target arc length during added timing period Td during.T1 becomes about 10～50ms between this first phase.Thus, even because of the pace of change change of the influence arc length of above-mentioned variable, must arc length arrives the target arc length after, keep fixing during and preparation enters ensuing second phase T2.Therefore, welding welding wire and mother metal are carried out suitable heat supply, and realize the good starting the arc.
(4) second phase T2 of moment t4～t5
When moment t4 timing period Td (T1 between the first phase) finished, shown in this figure (E), voltage setting signal Vr was from reducing to the setting value of the burning voltage under moment t5 time point Vcr ramped shaped ground at the setting value of the starting voltage under moment t4 time point Vsr.Constantly t4～t5 during become second phase T2, become the value that between the first phase of moment t3～t4 T1 multiply by the coefficient that is predetermined.Coefficient is set at the scope about 0.5～1.5.In coefficient=1.0 o'clock, it is the situation of T1=T2.This illustrates this situation.Coefficient according to the kind of poor, the welding welding wire of starting voltage setting value Vsr and burning voltage setting value Vcr, stablize feed speed etc. and be set to appropriate value.According to the variation of this voltage setting signal Vr, shown in this figure (G), weldingvoltage Vw ramped shaped ground reduces.Be accompanied by this situation, arc length also also shortens gradually.Shown in this figure (F), welding current Iw also between the first phase value the T1 little by little reduce.For arc length more successfully being led stablize arc length and this second phase T2 is set.Therefore, second phase T2 may not be set.
(5) between the stationary phase that t5 shifts constantly
When moment t5 second phase T2 finished, shown in this figure (E), voltage setting signal Vr became burning voltage setting value Vcr.Corresponding therewith, shown in this figure (G), weldingvoltage Vw also converges to fixed value.Follow this situation, arc length also is converged in stable arc length.Equally, shown in this figure (F), welding current Iw also is converged in the stable welding current value.When entering between stationary phase, repeat the short circuit of t51～t52 constantly during, constantly during the arc period, the short circuit of t53～t54 constantly of t52～t53, during the short circuit in such cycle of the arc period of t54～t55 constantly and arc period.Shown in this figure (G), weldingvoltage Vw becomes the short-circuit voltage value of several v in during short circuit, becomes the arc voltage value of tens v in arc period.In addition, shown in this figure (F), during becoming during short circuit, welding current Iw increases the waveform that in arc period, reduces gradually gradually.
Fig. 2 is the block diagram for the source of welding current of the striking control method of implementing the sacrificial electrode arc welding that above-mentioned embodiments of the present invention relate to.Below, with reference to this figure each module is described.
Electric power main circuit PM as input, according to the output control that driving signal Dv described later carries out inverter control etc., exports welding current Iw and weldingvoltage Vw with the source power supply (omitting diagram) of 3 phase 200v etc.Though this electric power main circuit PM omits diagram, have a rectifier of rectification source power supply, the galvanic capacitor that smoothly is rectified, according to above-mentioned driving signal Dv with smoothed direct current be transformed to high-frequency alternating current inverter circuit, with the high-frequency alternating current step-down for the high frequency transformer of the magnitude of voltage that is fit to arc welding, to by step-down high-frequency alternating current carry out the secondary rectifier of rectification and the galvanic reactor that smoothly is rectified.By with the rotation of the feed rolls 5 of feed motor WM coupling, welding welding wire 1 is fed in the welding torch 4, and mother metal 2 between produce electric arc 3 and weld.Welding torch 4 is carried in robot (omitting diagram).
Weldingvoltage testing circuit VD detects above-mentioned weldingvoltage Vw, and output weldingvoltage detection signal Vd.Weldingvoltage filter circuit VAV as input, removes radio-frequency component by low pass filter with this weldingvoltage detection signal Vd, output weldingvoltage filtering signal Vav.The cut-off frequency of low pass filter is set at about 0.1～1kHz.Because there are proportionate relationship roughly in the value of this weldingvoltage filtering signal Vav and arc length, so can detect arc length by this weldingvoltage filtering signal Vav.Survey arc length for fear of flase drop, remove high-frequency noise from inverter circuit by this circuit.And then, in order to remove because of the temporary transient change due to ejection of the gas in molten bath etc., more correctly detect the variation of arc length, be provided with this circuit.Welding current testing circuit ID detects above-mentioned welding current Iw, and output welding current detection signal Id.Energising judging circuit CD as input, is threshold value when above in this value with this welding current detection signal Id, and output becomes the energising judgment signal Cd of high level.This energising judgment signal Cd becomes the signal of high level when welding current Iw switches on.Therefore, threshold value is set at about 5A.
Robot controller RC storage is in advance by the operation procedure of teaching, according to the action of this operation procedure control robot (omitting diagram), and to source of welding current output welding commencing signal St.
Setting signal Thr during the hot exposure that initialization circuit THR output has been predesignated during the hot exposure.The burning voltage setting signal Vcr that burning voltage initialization circuit VCR output has been predesignated.Starting voltage initialization circuit VSR with this burning voltage setting signal Vcr as input, the starting voltage setting signal Vsr that output is calculated by the function of having predesignated.This function for example is Vsr=Vcr+ (positive setting).Must be set at Vsr＞Vcr.Arc length arrive judging circuit LD will above-mentioned weldingvoltage filtering signal Vav and above-mentioned starting voltage setting signal Vsr as input, when becoming Vav 〉=Vsr, export the arc length arriving signal Ld that becomes high level.The timing period setting signal Tdr that timing period initialization circuit TDR output has been predesignated.
During this time initialization circuit MS with above-mentioned welding commencing signal St, above-mentioned energising judgment signal Cd, above-mentioned hot exposure during setting signal Thr, above-mentioned arc length arriving signal Ld and above-mentioned timing period setting signal Tdr as input, carry out setting signal Ms between following processing and period of output.
When 1) welding commencing signal St becomes high level (beginning), export this value from 0 become 1 during setting signal Ms.During Ms=1, become during the deceleration feeding of Fig. 1.
2) after this, when energising judgment signal Cd becomes high level (energising), export its value become 2 during setting signal Ms.During Ms=2, become Th during the hot exposure of Fig. 1.
3) after this, in the time of during through setting signal Thr regulation during by hot exposure, export this value become 3 during setting signal Ms.T1 between the first phase that becomes Fig. 1 during the Ms=3.
4) after this, become high level (arrival) afterwards through during by timing period setting signal Tdr regulation the time at arc length arriving signal Ld, export this value become 4 during setting signal Ms.During Ms=4, become the second phase T2 of Fig. 1.
5) after this, through be multiply by the coefficient predesignated by the length during Ms=3 (T1 between the first phase) the value defined during the time, export this value become 5 during setting signal Ms.During Ms=5, become between the stationary phase of Fig. 1.
Voltage setting circuit VR with above-mentioned burning voltage setting signal Vcr, above-mentioned starting voltage setting signal Vsr and above-mentioned during setting signal Ms as input, in Ms≤3 o'clock, starting voltage setting signal Vsr is exported as voltage setting signal Vr, when Ms=4, output from the value of starting voltage setting signal Vsr to the value of burning voltage setting signal Vcr till the voltage setting signal Vr that reduces of ramped shaped ground, when Ms=5, burning voltage setting signal Vcr is exported as voltage setting signal Vr.Voltage error amplifying circuit EV amplifies output voltage error amplifying signal Ev to the error of this voltage setting signal Vr and above-mentioned weldingvoltage filtering signal Vav.
The hot exposure current settings signal Ihr that hot exposure current setting circuit IHR output has been predesignated.Current error amplifying circuit EI, the error of amplifying this hot exposure current settings signal Ihr and above-mentioned welding current detection signal Id, and output current error amplification signal Ei.
Control mode switching signal generative circuit CS as input, exports following control mode switching signal Cs with setting signal Ms during above-mentioned: in Ms=3～5 o'clock, become high level (constant voltage control), become low level (constant current control) during in addition.Control commutation circuit SW with above-mentioned voltage error amplifying signal Ev, above-mentioned current error amplifying signal Ei and above-mentioned control mode switching signal Cs as input, when Cs=low level (constant current control), current error amplifying signal Ei is exported as error amplification signal Ea, when Cs=high level (constant voltage control), voltage error amplifying signal Ev is exported as error amplification signal Ea.Drive circuit DV with this error amplification signal Ea and above-mentioned welding commencing signal St as input, when being high level, welding commencing signal St carries out PWM modulation control based on error amplification signal Ea, output is used for driving the driving signal Dv of the inverter circuit in the above-mentioned electric power main circuit PM, stops to drive the output of signal Dv when welding commencing signal St for low level.
Feed speed initialization circuit FR with setting signal Ms during above-mentioned as input, when Ms=1, the deceleration feed speed predesignated as feed speed setting signal Fr output, in Ms 〉=2 o'clock, is exported the stable feed speed of predesignating as feed speed setting signal Fr.Feeding control circuit FC with this feed speed setting signal Fr and above-mentioned welding commencing signal St as input, when welding commencing signal St is high level, to when being low level, welding commencing signal St will output to above-mentioned feed motor WM for the feeding control signal Fc of feed-disabling for outputing to above-mentioned feed motor WM with the feeding control signal Fc that is welded welding wire 1 by the speed feeding of feed speed setting signal Fr regulation.
In Fig. 1 and Fig. 2, in above-mentioned embodiments of the present invention, T1 becomes necessary constitutive requirements between the first phase.At this moment, timing period Td not necessarily must arrange as 0.Th and second phase T2 during the hot exposure may not be set.When timing period Td is not set, is set at timing period setting signal Tdr=0 and gets final product.In addition, during hot exposure is not set during Th, be set at hot exposure during setting signal Thr=0 get final product.In addition, when second phase T2 is not set, sets coefficient=0 and get final product.
(1) according to above-mentioned embodiment, increasing with the proportional weldingvoltage detected value of arc length and becoming the moment that equates with the starting voltage setting value of the value bigger than the burning voltage setting value, finishes between the first phase.Therefore, according to distance between state, joint geometry, power supply tip and the mother metal in the size of the molten ball of the welding welding wire front end before the welding beginning, molten bath, the influence of variable of stablizing the setting value etc. of weldingvoltage, even the pace of change of arc length produces change, also must reach target arc length (starting voltage setting value) at arc length (weldingvoltage detected value) and stop between the first phase afterwards.Therefore, produce after the electric arc, welding welding wire and mother metal are carried out suitable heat input, can get the starting the arc well.
(2) in addition, the weldingvoltage detected value is increased and equate with the starting voltage setting value, and, also can be at the time point that has passed through the timing period of predesignating from this time point between the termination first phase.Like this, arc length is kept this state at timing period after arriving the target arc length.Therefore because according to the setting value of timing period, can adjust after electric arc taken place soon the welding welding wire and the hot input quantity of mother metal, so can make the starting the arc better according to the kind of welding welding wire, welding, joint geometry, speed of welding etc.
The hot exposure electric current that also can control to switch on and predesignate by constant current in during this hot exposure (3) in addition, is set before between the first phase during the hot exposure predesignated.Like this, when being contacted with mother metal by the welding welding wire of deceleration feeding, can produce electric arc at once through too short short circuit.Therefore, can further improve the starting the arc.
(4) in addition, the second phase is set after between the first phase, this second phase is set at the time span that multiply by the coefficient gained between the first phase, and, in this second phase, also can come the setting voltage setting signal according to the mode that reduces to burning voltage set-point ramp shape ground from the starting voltage setting value.Like this, long arc length is to successfully shifting than the long short suitable arc length of arc length between the ratio first phase between stationary phase can be between the first phase.Therefore, can further improve the starting the arc.
Claims (4)
1. the striking control method of a sacrificial electrode arc welding, when the welding beginning, under the situation that welding current begins to switch on, during the first that the voltage setting signal value of being set at is big than burning voltage setting value starting voltage sets value, in between ensuing stationary phase described voltage setting signal being set at described burning voltage sets value, and control the welding current of switching on by constant voltage, the striking control method of this sacrificial electrode arc welding is characterised in that
Becoming the time point that equates with described starting voltage setting value in the increase of weldingvoltage detected value stopped between the described first phase.
2. the striking control method of sacrificial electrode arc welding as claimed in claim 1 is characterized in that,
Increase and become with described starting voltage setting value and to equate and passed through the time point of the timing period of predesignating from this time point at described weldingvoltage detected value, stop between the described first phase.
3. the striking control method of sacrificial electrode arc welding as claimed in claim 1 or 2 is characterized in that,
The hot exposure electric current of controlling to switch on and predesignating by constant current in during this hot exposure is set before between the described first phase during the hot exposure of predesignating.
4. as the striking control method of any described sacrificial electrode arc welding of claim 1～3, it is characterized in that,
After between the described first phase be set the second phase, this second phase is set at multiply by the time span of the coefficient gained of predesignating between the described first phase, and, in this second phase, set described voltage setting signal in the mode that reduces to described burning voltage set-point ramp shape ground from described starting voltage setting value.
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| JP2011284593A JP5943460B2 (en) | 2011-12-27 | 2011-12-27 | Arc start control method for consumable electrode arc welding |
| JP2011-284593 | 2011-12-27 |
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| CN104646797A (en) * | 2013-11-15 | 2015-05-27 | 株式会社大亨 | Electrical arc welding method |
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| JP6184007B2 (en) * | 2013-08-29 | 2017-08-23 | 株式会社ダイヘン | Arc start control method |
| CN104400185B (en) * | 2014-10-28 | 2016-05-04 | 无锡汉神电气有限公司 | The striking detection of electric arc welding equipment and push current control circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104646797A (en) * | 2013-11-15 | 2015-05-27 | 株式会社大亨 | Electrical arc welding method |
| CN104646797B (en) * | 2013-11-15 | 2018-09-11 | 株式会社大亨 | Arc-welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5943460B2 (en) | 2016-07-05 |
| JP2013132658A (en) | 2013-07-08 |
| CN103182584B (en) | 2016-05-04 |
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