CN103182584B - The striking control method of sacrificial electrode arc welding - Google Patents
The striking control method of sacrificial electrode arc welding Download PDFInfo
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- CN103182584B CN103182584B CN201210567744.2A CN201210567744A CN103182584B CN 103182584 B CN103182584 B CN 103182584B CN 201210567744 A CN201210567744 A CN 201210567744A CN 103182584 B CN103182584 B CN 103182584B
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Abstract
The invention provides a kind of striking control method of sacrificial electrode arc welding. in the time that the welding of sacrificial electrode arc welding starts, after electric arc occurs, make it fast and successfully shift to stable state. in the striking control method of this sacrificial electrode arc welding, in the time that welding starts, in the situation that welding current (Iw) starts energising (moment t2), in first period (T1), starting voltage larger than burning voltage setting value (Vcr) voltage setting signal (Vr) value of being set as is set value to (Vsr), between the stationary phase of continuing, in (after moment t5), voltage setting signal (Vr) is set as to burning voltage setting value (Vcr), make welding current (Iw) energising by constant voltage control, become in weldingvoltage detected value (Vw) increase the time point equating with starting voltage setting value (Vsr) and stop first period (T1). therefore, because must stop this first period after arc length arrives target arc length, thus can carry out suitable heat input to welding welding wire and mother metal, and successfully transfer to stable state.
Description
Technical field
The present invention relates to the striking control method of the sacrificial electrode arc welding that can obtain the good starting the arc.
Background technology
In the invention of patent fraction 1, approximate period repeat the consumption that electric arc and short circuit are weldedIn electrode arc weldering, be set with following during: constant current control period, the tens of millis after electric arc startingHot exposure (hotstart) electric current of energising regulation during second, formation can make the front end at welding welding wireThe molten size of carrying out short circuiting transfer forming; During constant voltage control high voltage is set, ensuingDuring hundreds of ms, energising weldingvoltage produces than the constant voltage control of the high several v of stable weldingvoltageWelding current expand arc length; During constant voltage control low voltage set, further at ensuing numberDuring hundred ms, produce than the constant voltage control of the low several v of stable weldingvoltage by energising weldingvoltageRaw welding current, shortens arc length, thereby makes it carry out regularly the repetition period of electric arc and short circuit;And during constant voltage control burning voltage sets, energising arc length does not become too short stable weldingvoltage instituteThe welding current of the constant voltage control producing, makes it carry out regularly the cycle of electric arc and short circuit. Because logicalCross the striking control method that carries out this sacrificial electrode arc welding, can suppress in the transition period after the starting the arcThe short circuit producing and the irregular state repeatedly of electric arc, so can obtain the good starting the arc.
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, above-mentioned constant voltage control high voltage is set to during settingSetting. Action effect during this constant voltage control high voltage is set be by arc length elongation until with than surelyTill determining target arc length that weldingvoltage that weldingvoltage is high is corresponding. By than elongating arc between stationary phaseLong, welding welding wire and mother metal in suitable melting state under produce short circuit. As above, short circuit andThe cycle of electric arc, in advance in stable state, can obtain the good starting the arc.
But the cambic change of arc length, because welding the molten ball of the welding welding wire front end before startingState, joint geometry, the power supply tip (tip) and mother metal spacing, stable weldering in size, molten bathConnect setting value of voltage etc. variable impact and change. Its result, in the constant voltage control of regulationHigh voltage set during, produce arc length under the state of miss the mark arc length during stop situation.Conversely, reached in advance target arc length because arc length changes rapidly, thereby become under this stateContinue long until stop during the setting of constant voltage control high voltage. If in such state,The heat input of welding welding wire and mother metal is become to too small or too much, and the starting the arc degenerates.
Therefore, the striking control method of following sacrificial electrode arc welding is provided in the present invention: no matterThe impact of above-mentioned variable, during all can making in the time of the starting the arc arc length elongated between temporarily than stationary phaseSuitableization, 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 sacrificial electrode arc weldingStriking control method, in the time that welding starts, in the situation that welding current starts energising, in the first phaseBetween in the voltage setting signal value of being set as is set value to large starting voltage setting value than burning voltage,In between ensuing stationary phase, described voltage setting signal is set as to described burning voltage setting value, andBy the constant voltage control welding current of switching on, the feature of the striking control method of this sacrificial electrode arc weldingBe, become with described starting voltage and set value the time point equating in the increase of weldingvoltage detected valueStop described first period.
In a second aspect of the present invention, the sacrificial electrode arc welding as described in a first aspect of the present inventionStriking control method, it is characterized in that, described weldingvoltage detected value increase and with described startingVoltage setting value becomes the time equal and passed through the timing period of predetermining from this time pointPoint, stops described first period.
In a third aspect of the present invention, the sacrificial electrode electricity as described in the present invention first or second aspectThe striking control method of arc-welding, is characterized in that, before described first period, setting is predeterminedDuring hot exposure, during this hot exposure in by the constant current control hot exposure electricity of predetermining of switching onStream.
In a fourth aspect of the present invention, if the present invention first is to the consumption as described in the 3rd any aspectThe striking control method of electrode arc weldering, is characterized in that, after described first period, arranges secondDuring this time, this second phase is set as when described first period is multiplied by the coefficient gained predeterminedBetween length, and, in this second phase to set value to described burning voltage from described starting voltageThe mode that set-point ramp shape ground reduces is set described voltage setting signal.
According to the present invention, increase and become with value than steady at weldingvoltage detected value proportional to arc lengthDetermine the starting voltage that voltage setting value is large and set value equal time point, finish first period. Therefore,The size of the molten ball of the welding welding wire front end according to welding before starting, the state in molten bath, joint geometry,Power supply tip and mother metal spacing, the impact of stablizing the variable of the setting value etc. of weldingvoltage,Make the pace of change of arc length produce variation, also must reach target arc at arc length (weldingvoltage detected value)Long (starting voltage setting value) stops first period afterwards. Therefore, after producing electric arc, to welding welderingSilk and mother metal carry out suitable heat input, can obtain the good starting the arc.
Brief description of the drawings
Fig. 1 is the striking control method of the sacrificial electrode arc welding that illustrates that embodiments of the present invention relate toSequential chart.
Fig. 2 is the starting the arc control for implementing the sacrificial electrode arc welding that embodiments of the present invention relate toThe block diagram of the source of welding current of method.
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 generating circuit
Cs control mode switching signal
DV drive circuit
Dv drives signal
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
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
Iw welding current
LD arc length arrives judging circuit
Ld arc length arriving signal
Initialization circuit during MS
Setting signal during Ms
PM electric power main circuit
RC robot controller
St welds commencing signal
SW controls commutation circuit
T1 first period
The T2 second phase
Td timing period
TDR timing period initialization circuit
Tdr timing period setting signal
During Th hot exposure
Initialization circuit during THR hot exposure
Setting signal during Thr hot exposure
VAV weldingvoltage filter circuit
Vav weldingvoltage filtering signal
VCR burning voltage initialization circuit
Vcr burning voltage is set (signal/value)
VD weldingvoltage testing circuit
Vd weldingvoltage detection signal
VR voltage setting circuit
Vr voltage setting signal
VSR starting voltage initialization circuit
Vsr starting voltage is set (signal/value)
Vw weldingvoltage
WM feed motor
Detailed description of the invention
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the striking control method of the sacrificial electrode arc welding that illustrates that embodiments of the present invention relate toSequential chart. This figure (A) illustrates welding commencing signal St, and this figure (B) illustrates control mode switching signalCs, 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, and this figure (F) illustrates welding current Iw, and this figure (G) illustrates welderingMeet voltage Vw. This figure is exemplified with the situation of welding that has used robot. Below, enter with reference to this figureRow explanation.
In moment t1, move and make welding torch arrive welding when initial position in robot, from robotControl device is to source of welding current output welding commencing signal St.
(1) during the deceleration feeding of moment t1～t2
As shown in this figure (A), in moment t1, start letter in the welding from robot controllerWhen number St becomes high level, because the source of welding current starts output, so as this figure (G) as shown in, without bearingLive is pressed and is applied between welding welding wire and mother metal. Meanwhile, as shown in this figure (C), feed speed FwBecome the slow deceleration feed speed of 1～2m/min left and right, welding welding wire and mother metal move closer to. AsShown in this figure (B), control mode switching signal Cs becomes low level (constant current control) until moment t3 isOnly, after this become high level (constant voltage control). This control mode switching signal Cs is by the source of welding currentThe mode that output is controlled switches to the signal of constant current control or constant voltage control. As shown in this figure (D),Arc length arriving signal Ld is following signal, becomes low level until moment t31 that is:, timeIn carving during t31～t4, become high level, after this become low level. This arc length arriving signal Ld beWhen arc length reaches target arc length, become the signal of high level. As shown in this figure (E), voltage setting signalVr became starting voltage setting value Vsr before moment t4, during moment t4～t5 in from starting electricityBe installed with definite value Vsr and reduce with slope (slope) shape to burning voltage setting value Vcr, after this become steadyDetermine voltage setting value Vcr. Starting voltage setting value Vsr is set value Vcr linkedly with burning voltageSet, be set to than the value of the large 2～5v of burning voltage setting value Vsr left and right. According to welding welding wireKind, feed speed etc. set burning voltage setting value Vcr so that arc length becomes the mode of appropriate value.Therefore arc length when arc length when, starting voltage sets value Vsr sets value Vcr than burning voltage becomesLong, this arc length becomes target arc length.
(2) Th during the hot exposure of moment t2～t3
In moment t2, contact with mother metal and when conducting, as shown in this figure (G), weld at welding welding wireConnect the short-circuit voltage value that voltage Vw is sharply reduced to several v left and right. Meanwhile, as shown in this figure (F), welderingThe energising that meets electric current I w starts, during the hot exposure of predetermining of moment t2～t3 in Th, in advanceThe hot exposure electric current I h energising of regulation. During this hot exposure in Th, as shown in this figure (B), becauseControl mode switching signal Cs is low level, so become constant current control. During hot exposure, Th is establishedBe decided to be 5～15ms left and right, hot exposure electric current I h is set to 450～600A left and right. Two value basesThe kind of welding welding wire, stablize feed speed etc. and be all set to appropriate value. In moment t2, in welderingWhen the energising that meets electric current I w starts, as shown in this figure (C), feed speed Fw is switched to rule in advanceThe stable feed speed of having determined. This hot exposure electric current I h is in order to shift to an earlier date the front end of fusion weld welding wire and to produceGive birth to electric arc and switch on. Therefore, at the moment t21 after the short time of 1ms left and right from moment t2,Produce electric arc. In the time that electric arc produces, as shown in this figure (G), weldingvoltage Vw is sharply increased to tens ofThe arc voltage value of v. During moment t21～t3, because hot exposure electric current I h makes to weld welding wireFront end is melted, and therefore arc length is elongated gradually. Correspondingly, as shown in this figure (G), weldingvoltageVw its value during moment t21～t3 becomes large gradually. Th during this hot exposure is not definitely essentialArrange necessary during. Even item carries out below adopting in the time that welding welding wire has contacted with mother metalDuring bright first period T1 short circuit, because the welding current Iw of large current value energising, so rootIn the time that producing, electric arc do not produce such problem according to welding condition.
(3) the first period T1 of moment t3～t4
In moment t3, when during hot exposure, Th stops, as shown in this figure (B), control mode is cutChange signal Cs and be changed to high level, switch to constant voltage control. As shown in this figure (E), because in the momentThe value of the voltage setting signal Vr of t3 time point is starting voltage setting value Vsr, so according to this settingValue is carried out constant voltage control. As shown in this figure (G), weldingvoltage Vw is because be than in the moment t3 timePoint sets value with starting voltage the value that value corresponding to Vsr is little, so this value is gradually by constant voltage controlIncrease. Be accompanied by this situation, arc length is also little by little elongated. And, in moment t31, as thisShown in figure (G), the value of weldingvoltage Vw equates with the value that sets value Vsr corresponding to starting voltage. WithThis correspondence, as shown in this figure (D), arc length arriving signal Ld is changed to high level, and continue untilTill moment t4. ,, in moment t31, arc length reaches target arc length. From this moment t31 to warpCross the moment t4 of the timing period Td having predetermined, as shown in this figure (E), voltage setting signalVr keeps starting voltage setting value Vsr constant, and as shown in this figure (G), the value of weldingvoltage Vw is protectedHold the value corresponding with starting voltage setting value Vsr constant, it is constant that arc length is maintained at target arc length. AsShown in this figure (F), welding current Iw becomes in moment t3 and has sharply reduced from hot exposure electric current I hValue. Timing period Td is set to appropriate value in the scope of 0～10ms. In the time of Td=0, be notThe situation of timing period is set. This timing period Td according to welding welding wire kind, welding, connectHead shapes and speed of welding etc. are set to appropriate value. The first period T1 of moment t3～t4 asThe above is not specified time limit, and become Th during hot exposure stop time be carved into arc length arriveDuring having added timing period Td during before target arc length. This first period T1 becomes 10～50ms left and right. Thus, even because of the pace of change variation of the impact arc length of above-mentioned variable,Must after arc length arrives target arc length, maintain fixing during and prepare to enter the ensuing second phaseBetween T2. Therefore, welding welding wire and mother metal are carried out to suitable heat supply, and realize the good starting the arc.
(4) second phase T2 of moment t4～t5
In the time that moment t4 timing period Td (first period T1) finishes, as shown in this figure (E), voltage is establishedDetermine signal Vr from the starting voltage setting value Vsr under moment t4 time point at moment t5 time pointUnder burning voltage setting value Vcr ramped shaped ground reduce. During moment t4～t5, become the second phaseT2, becomes at the first period of moment t3～t4 T1 and is multiplied by the value of the coefficient predetermining. Coefficient quiltBe set in the scope of 0.5～1.5 left and right. In coefficient=1.0 o'clock, it is the situation of T1=T2. This illustratesThis situation. Coefficient is according to poor, the weldering of starting voltage setting value Vsr and burning voltage setting value VcrConnect welding wire kind, stablize feed speed etc. and be set to appropriate value. According to this voltage setting signalThe variation of Vr, as shown in this figure (G), weldingvoltage Vw ramped shaped ground reduces. Be accompanied by this situation,Arc length also also shortens gradually. As shown in this figure (F), welding current Iw is also from first period T1Value little by little reduces. Stablize arc length and this second phase T2 is set for arc length is more successfully led.Therefore, second phase T2 may not be set.
(5) between the stationary phase that moment t5 shifts
In the time that the moment t5 second phase, T2 finished, as shown in this figure (E), voltage setting signal Vr becomesFor burning voltage setting value Vcr. Correspondingly, as shown in this figure (G), weldingvoltage Vw also restrainsFor fixed value. Follow this situation, arc length is also converged in stable arc length. Equally, as shown in this figure (F),Welding current Iw is also converged in stable welding current value. In the time entering between stationary phase, repetition moment t51～During the short circuit of t52, during the short circuit of the arc period of moment t52～t53, moment t53～t54,During the short circuit in such cycle of the arc period of moment t54～t55 and arc period. As this figure (G)Shown in, weldingvoltage Vw becomes the short-circuit voltage value of several v in during short circuit, in arc periodBecome the arc voltage value of tens v. In addition, as shown in this figure (F), welding current Iw becomes shortDuring road, increase gradually the waveform reducing gradually in arc period.
Fig. 2 is for implementing rising of sacrificial electrode arc welding that above-mentioned embodiments of the present invention relate toThe block diagram of the source of welding current of arc control method. Below, with reference to this figure, each module is described.
Electric power main circuit PM using the source power supply of 3 phase 200v etc. (omitting diagram) as inputting, according toDriving signal Dv described later carries out the output control of inverter control etc., output welding current Iw and welderingMeet voltage Vw. Although this electric power main circuit PM omits diagram, has one of rectification source power supplyInferior rectifier, be smoothly rectified galvanic capacitor, will be put down according to above-mentioned driving signal DvSliding direct current is transformed to the inverter circuit of high-frequency alternating current, high-frequency alternating current step-down is electric for being applicable toThe high frequency transformer of the magnitude of voltage of arc-welding, to by step-down high-frequency alternating current to carry out the secondary of rectification wholeStream device and the galvanic reactor being smoothly rectified. By with feed motor WM couplingThe rotation of feed rolls 5, welding welding wire 1 be fed in welding torch 4, and mother metal 2 between produce electricityArc 3 welds. Welding torch 4 is mounted in robot (omitting diagram).
Weldingvoltage testing circuit VD detects above-mentioned weldingvoltage Vw, and exports weldingvoltage inspectionSurvey signal Vd. Weldingvoltage filter circuit VAV is using this weldingvoltage detection signal Vd as input,Remove radio-frequency component by low pass filter, output weldingvoltage filtering signal Vav. Low pass filterCut-off frequency be set at about 0.1～1kHz. Because the value of this weldingvoltage filtering signal VavThere is proportionate relationship roughly with arc length, so can detect arc by this weldingvoltage filtering signal VavLong. For fear of error detection arc length, remove the high-frequency noise from inverter circuit by this circuit.And then, in order to remove because of the temporary transient variation due to the ejection of the gas from molten bath etc., come more accurateGround detects the variation of arc length, is provided with this circuit. Welding current testing circuit ID detects above-mentioned welderingMeet electric current I w, and export welding current detection signal Id. Energising judging circuit CD is by this welding currentDetection signal Id is as input, is threshold value when above in this value, and output becomes the energising of high level and differentiatesSignal Cd. This energising judgment signal Cd becomes the signal of high level in the time that welding current Iw switches on.Therefore, threshold value is set at 5A left and right.
Robot controller RC storage is in advance by the operation procedure of teaching, according to this operation procedure controlThe action of robot processed (omitting diagram), and to source of welding current output welding commencing signal St.
Setting signal during the hot exposure that during hot exposure, initialization circuit THR output has been predeterminedThr. The burning voltage setting signal Vcr that burning voltage initialization circuit VCR output has been predetermined.Starting voltage initialization circuit VSR is using this burning voltage setting signal Vcr as input, and output is by advanceThe starting voltage setting signal Vsr that the function first having specified calculates. This function is for exampleVsr=Vcr+ (positive setting). Must be set as Vsr > Vcr. Arc length arrives judging circuit LD by upperThe weldingvoltage filtering signal Vav stating and above-mentioned starting voltage setting signal Vsr be as input,While becoming Vav >=Vsr, output becomes the arc length arriving signal Ld of high level. Timing period initialization circuitThe timing period setting signal Tdr that TDR output has been predetermined.
Initialization circuit MS is by above-mentioned welding commencing signal St, above-mentioned energising judgment signal during this timeSetting signal Thr during Cd, above-mentioned hot exposure, above-mentioned arc length arriving signal Ld and above-mentionedTiming period setting signal Tdr as input, carry out setting signal between following processing period of outputMs。
1), when welding commencing signal St becomes high level (beginning), export this value and become during 1 from 0Setting signal Ms. During Ms=1, during becoming the deceleration feeding of Fig. 1.
2) after this,, when energising judgment signal Cd becomes high level (energising), exporting its value becomes for 2 phaseBetween setting signal Ms. During Ms=2, become Th during the hot exposure of Fig. 1.
3) after this,, during through setting signal Thr regulation during by hot exposure time, export this valueSetting signal Ms during becoming 3. During Ms=3, become the first period T1 of Fig. 1.
4) after this, become high level (arrival) afterwards through being established by timing period at arc length arriving signal LdWhile determining during signal Tdr regulation, setting signal Ms during exporting this value and becoming 4. At Ms=4During, become the second phase T2 of Fig. 1.
5) after this, be multiplied by and predetermine by the length during Ms=3 (first period T1) in processCoefficient and value defined during time, setting signal Ms during exporting this value and becoming 5.During Ms=5, become between the stationary phase of Fig. 1.
Voltage setting circuit VR is by above-mentioned burning voltage setting signal Vcr, above-mentioned starting voltageSetting signal Vsr and above-mentioned during setting signal Ms as input, in Ms≤3 o'clock, will riseMoving voltage setting signal Vsr is as voltage setting signal Vr output, and in the time of Ms=4, output is from startingThe value of voltage setting signal Vsr till the value ramped shaped ground of burning voltage setting signal Vcr reduceVoltage setting signal Vr, in the time of Ms=5 using burning voltage setting signal Vcr as voltage setting signalVr output. Voltage error amplifying circuit EV is to this voltage setting signal Vr and above-mentioned weldingvoltageThe error of filtering signal Vav is amplified, output voltage error amplifying signal Ev.
The hot exposure current settings signal Ihr that hot exposure current setting circuit IHR output has been predetermined.Current error amplifying circuit EI, amplifies this hot exposure current settings signal Ihr and above-mentioned welding currentThe error of detection signal Id, and output current error amplification signal Ei.
Control mode switching signal generating circuit CS, during above-mentioned, setting signal Ms is as defeatedEnter, export following control mode switching signal Cs: in Ms=3～5 o'clock, become high level (constant voltageControl), during in addition, become low level (constant current control). Control commutation circuit SW by above-mentionedVoltage error amplifying signal Ev, above-mentioned current error amplifying signal Ei and above-mentioned control modeSwitching signal Cs is as input, when Cs=low level (constant current control) by current error amplifying signalEi, as error amplification signal Ea output, amplifies voltage error when Cs=high level (constant voltage control)Signal Ev exports as error amplification signal Ea. Drive circuit DV is by this error amplification signal EaAnd above-mentioned welding commencing signal St is as input, when welding commencing signal St is high level based onError amplification signal Ea carries out PWM modulation control, and output is for driving above-mentioned electric power main circuitThe driving signal Dv of the inverter circuit in PM stops in the time that welding commencing signal St is low levelDrive the output of signal Dv.
Feed speed initialization circuit FR during above-mentioned setting signal Ms as input, at Ms=1Time, the output using the deceleration feed speed of predetermining as feed speed setting signal Fr, in Ms >=2Time, export the stable feed speed of predetermining as feed speed setting signal Fr. Feeding controlCircuit FC processed is using this feed speed setting signal Fr and above-mentioned welding commencing signal St as input,In the time that welding commencing signal St is high level, by for by feed speed setting signal Fr regulationThe feeding control signal Fc of speed feeding welding welding wire 1 outputs to above-mentioned feed motor WM,In the time that welding commencing signal St is low level, the feeding control signal Fc for feed-disabling is outputed toAbove-mentioned feed motor WM.
In Fig. 1 and Fig. 2, in above-mentioned embodiments of the present invention, first period T1 becomesFor necessary constitutive requirements. Now, timing period Td, as 0, not necessarily must arrange. May notTh and second phase T2 during hot exposure must be set. In the time that timing period Td is not set, establishBe decided to be timing period setting signal Tdr=0. In addition, during hot exposure is not set when Th,Be set as setting signal Thr=0 during hot exposure. In addition, in the time that second phase T2 is not set,Set coefficient=0.
(1), according to above-mentioned embodiment, increase at weldingvoltage detected value proportional to arc lengthSet value with the starting voltage that sets value large value than burning voltage the moment equating and become, finish theDuring one. Therefore, the size of the molten ball of the welding welding wire front end before starting, molten bath according to weldingState, joint geometry, power supply tip and mother metal spacing, the change of stablizing setting value of weldingvoltage etc.The impact of reason element, even if the pace of change of arc length produces variation, also must be in arc length (weldingvoltage inspectionMeasured value) reach target arc length (starting voltage setting value) and stop afterwards first period. Therefore, produce electric arcAfterwards, welding welding wire and mother metal are carried out to suitable heat input, can obtain the starting the arc well.
(2) in addition, weldingvoltage detected value is increased and equate with starting voltage setting value, and, alsoCan stop first period at the time point that has passed through the timing period of predetermining from this time point. ThisSample, arc length maintains this state at timing period after arriving target arc length. Therefore, because according to delaySetting value during this time, can adjust the heat input of welding welding wire soon after electric arc is occurred and mother metalAmount, so can make according to the kind of welding welding wire, welding, joint geometry, speed of welding etc.Arc is better.
(3) in addition, during the hot exposure of having predetermined being set before first period, in this hot exposure phaseBetween in also can be by the constant current control hot exposure electric current of having predetermined of switching on. Like this, slowed downWhen the welding welding wire of feeding contacts with mother metal, can produce at once electric arc through too short short circuit. Therefore,Can further improve the starting the arc.
(4) in addition, be set after first period the second phase, this second phase was set as in the first phaseBetween be multiplied by the time span of coefficient gained, and, also can be according to from starting electricity in this second phaseBe installed with definite value to burning voltage set-point ramp shape the mode that reduces carry out setting voltage setting signal. ThisSample, the arc length that can grow from first period is to long arc length in the ratio first period than between stationary phaseShort suitable arc length successfully shifts. Therefore, can further improve the starting the arc.
Claims (4)
1. a striking control method for sacrificial electrode arc welding, in the time that welding starts, at welding electricityStream starts, in the situation of energising, during the first the voltage setting signal value of being set as to be compared to burning voltageSet value large starting voltage setting value, between ensuing stationary phase in by described voltage setting signalBe set as described burning voltage setting value, and by the constant voltage control welding current of switching on, this consumption electricityThe striking control method of pole electrical arc weldering is characterised in that:
Become with described starting voltage and set value the time point equating in the increase of weldingvoltage detected valueStop described first period.
2. the striking control method of sacrificial electrode arc welding as claimed in claim 1, its feature existsIn,
Described weldingvoltage detected value increase and with described starting voltage setting value become equate andThrough the time point of the timing period of predetermining from this time point, stopped described first period.
3. the striking control method of sacrificial electrode arc welding as claimed in claim 1 or 2, its spyLevy and be,
During the hot exposure predetermined being set before described first period, during this hot exposure inBy the constant current control hot exposure electric current of predetermining of switching on.
4. the striking control method of sacrificial electrode arc welding as claimed in claim 1 or 2, its spyLevy and be,
After described first period, be set the second phase, this second phase was set as the described first phaseBetween be multiplied by the time span of the coefficient gained of predetermining, and, in this second phase with from describedStarting voltage setting value to described burning voltage set-point ramp shape the mode that reduces set described electricityPress setting signal.
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| JP2011-284593 | 2011-12-27 | ||
| JP2011284593A JP5943460B2 (en) | 2011-12-27 | 2011-12-27 | Arc start control method for consumable electrode arc welding |
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| CN103182584A CN103182584A (en) | 2013-07-03 |
| CN103182584B true CN103182584B (en) | 2016-05-04 |
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| JP6184007B2 (en) * | 2013-08-29 | 2017-08-23 | 株式会社ダイヘン | Arc start control method |
| JP6296641B2 (en) * | 2013-11-15 | 2018-03-20 | 株式会社ダイヘン | Arc welding 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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| CN101269433A (en) * | 2007-03-23 | 2008-09-24 | 株式会社大亨 | Arc starting method for double-electrode arc welding |
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| CN103182584A (en) | 2013-07-03 |
| JP5943460B2 (en) | 2016-07-05 |
| JP2013132658A (en) | 2013-07-08 |
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