CN103028812B - The arc crater control method of two welding wire welding - Google Patents
The arc crater control method of two welding wire welding Download PDFInfo
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- CN103028812B CN103028812B CN201210361651.4A CN201210361651A CN103028812B CN 103028812 B CN103028812 B CN 103028812B CN 201210361651 A CN201210361651 A CN 201210361651A CN 103028812 B CN103028812 B CN 103028812B
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Abstract
The arc crater control method of two welding wire welding shortens the arc crater processing time in two welding wire welding. this pair of wire welding connected during stabilization in (before moment t1), between welding welding wire and mother metal, apply weldingvoltage (Vww) and the welding current of switching on (Iww) produces electric arc, and making filler wire contact on one side one side with the molten bath forming by this electric arc carries out feeding (Fs) and carries out, in the arc crater control method of this pair of welding wire welding, during arc crater in (Tc), continuing under the state of the generation of electric arc and the feeding of filler wire (Fs), the distance between weldingwires that makes to weld welding wire and filler wire from (Lw) than short-and-medium between stationary phase, carry out thus arc crater processing. thus, even if the value of the welding current (Iww) of electric arc being switched on due to arc crater processing diminishes and the temperature in molten bath reduces, also can pass through the direct melting filler wire of electric arc, therefore in during arc crater, also can carry out the feeding (Fs) of filler wire, can shorten arc crater and process required time.
Description
Technical field
It is two that the molten bath feeding filler wire that the present invention relates to that sacrificial electrode electric arc is produced carries outArc crater (crater) control method of welding wire welding.
Background technology
The molten bath that filler wire is contacted form by sacrificial electrode electric arc while carry out feedingTwo welding wire welding methods of carrying out, owing to using welding welding wire and the filler wire of sacrificial electrode electric arcThese two kinds of welding wires, therefore good aspect high-speed welding and high deposited property. Especially, two in employingWhen welding wire welding method is carried out high-speed welding, in order to prevent from becoming humping weld (bumpingbead),More to contact feeding with molten bath be important at rear from sacrificial electrode electric arc to make filler wire. This be becauseCarry out melting if filler wire is fed in the generating unit of sacrificial electrode electric arc, molten bath is coldBut effect diminishes, and owing to can not suppress the protuberance of the latter half in molten bath by filler wire, fromAnd the cause that the effect that suppresses humping weld does not almost have. On the other hand, if make filler wire and electricityThe feeding that contacts of the latter half in the molten bath outside the generating unit of arc, and melt by the heat in molten bathMelt, molten bath is cooled efficiently, and suppresses molten bath latter half by filler wire and canSuppress the formation of humping weld. In the following description, the welding wire of sacrificial electrode electric arc is recited as to welderingConnect welding wire, distinguish with filler wire. As the welding that produces sacrificial electrode electric arc, use twoCarbon oxide gas arc-welding process, MAG (protection of consumable electrode active gases) welding, MIG (meltChange utmost point inert gas shielding) welding, pulse MAG welding connection, pulse MIC welding connection, consumptionElectrode alternating-current pulse arc-welding process etc. .
In the time that the welding of two welding wire welding finishes, under the state that welding torch is stopped, stopping filler wireFeeding and carry out arc crater processing by sacrificial electrode electric arc. During arc crater, stop filler wireThe reasons are as follows of feeding described in. During arc crater, in order to form sound arc crater portion, make welding welderingThe feed speed of silk is than slow 40～70% degree between stationary phase. Its result, due to energising sacrificial electrode electricityThe value of the welding current of arc also diminishes, and therefore the temperature in molten bath is also than reducing between stationary phase. Therefore, asFruit is fed into molten bath by filler wire in during arc crater, can not carry out fully melting, this be because ofFor there is the cause in the bad situation of melting. Therefore, in the welding of two welding wires, during arc crater inStopping the feeding of filler wire and only carrying out arc crater processing by sacrificial electrode electric arc is general feelingsCondition (reference example is as patent documentation 1). At this, so-called arc crater processing is to arrive welding stop bits at welding torchUnder the state of putting and stopped, welding weldering is filled in the molten bath under the state in depression due to electric arcSilk forms the situation of sound welding bead portion.
Patent documentation 1JP JP 2009-154173 communique
Summary of the invention
As described above, in the two welding wires welding of prior art, stop filling weldering in during arc craterThe feeding of silk the sacrificial electrode electric arc only producing by welding welding wire carry out arc crater processing. As aboveLike that, if only carry out arc crater processing by welding welding wire, melting gold is filled to by the arc crater portion of depressionGenus forms sound welding bead needs spended time. Two welding wire welding can be carried out high-speed welding, have lifeProduce the high feature of efficiency. In order further to improve this speciality, need to shorten arc crater and process when neededBetween.
At this, the object of the present invention is to provide one can shorten arc crater processing in two welding wires weldingThe arc crater control method of two welding wire welding of needed time.
In order to solve above-mentioned problem, the invention of technical scheme 1 is the arc crater control of a kind of pair of welding wire weldingMethod processed, this pair of wire welding produced electric arc in connecting during stabilization between welding welding wire and mother metal,And the molten bath feeding filler wire forming by this electric arc is carried out to the arc of this pair of welding wire weldingHole control method is characterised in that, during arc crater in, continuing generation and above-mentioned the filling out of above-mentioned electric arcFill under the state of feeding of welding wire, make the distance between weldingwires between above-mentioned welding welding wire and above-mentioned filler wireFrom than short-and-medium during aforementioned stable, carry out thus arc crater processing.
The invention of technical scheme 2 is the arc crater control of the two welding wire welding on the basis of technical scheme 1Method, is characterized in that, the feed speed of the above-mentioned welding welding wire in making during above-mentioned arc crater is than above-mentionedFeed speed between stationary phase is slow, the feed speed of the above-mentioned filler wire in making during above-mentioned arc craterSlower than the feed speed in during aforementioned stable, the entering of the above-mentioned filler wire in making during above-mentioned arc craterTo speed than above-mentioned arc crater during in the feed speed of above-mentioned welding welding wire slow.
The effect of invention
According to the present invention, during arc crater in, continuing the generation of electric arc and the feeding of filler wireUnder state, make to weld distance between weldingwires between welding wire and filler wire from than between stationary phase shorter enterThe processing of row arc crater. Thus, even the value of the welding current to electric arc energising diminishes due to arc crater processingAnd the temperature in molten bath reduces, also can be by electric arc by direct filler wire melting, therefore during arc crater inAlso can feeding filler wire, can shorten arc crater and process the needed time. Its result, improves and producesEfficiency.
Brief description of the drawings
Fig. 1 is the arc crater control method for implementing two welding wire welding that embodiments of the present invention are relevantThe structure chart of welder.
Fig. 2 is the block diagram of the source of welding current PS of the welder described in pie graph 1.
Fig. 3 is the arc crater control method for two welding wire welding that embodiments of the present invention are relevant are describedFig. 1～Fig. 2 in the sequential chart of each signal.
Fig. 4 is the figure of the weld part in representing during arc crater.
Detailed description of the invention
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the arc crater control method for implementing two welding wire welding that embodiments of the present invention are relevantThe structure chart of welder. Below, with reference to this figure, each construct is described.
This welder possesses by the welding torch WT of dotted line, source of welding current PS, robot control and fillsPut RC and robot (diagram is omitted). Welding torch WT possesses for to welding welding wire 1a power supplyPower supply chip 4a, for filler wire 1b being directed to the feeding guider 4b of insertion position and filling outFill welding wire travel mechanism 6. Filler wire travel mechanism 6 is for comprising with distance between weldingwires described later from settingSignal Lwr, as input, makes the insertion position of filler wire 1b according to the value of this setting signal LwrMove up in the front and back of welding direction and distance between weldingwires is automatically adjusted from Lw electronicThe mechanism of machine. As this mechanism, adopted the rotatablely moving motor by slider crank mechanism in the pastBe transformed to straight-line mechanism, by crank and jack back, rotatablely moving of motor be transformed to and shakenThe mechanism of moving motion etc. Spray the mixed of carbon dioxide, carbon dioxide and argon gas from the front end of welding torch WTClose the protective gas (diagram is omitted) of gas etc. Welding torch WT is by robot (diagram is omitted) quiltKeep, and be moved along sealing wire according to the operation procedure being stored in robot controller RC.
Welding welding wire 1a is by the welding welding wire use being coupled with feed motor WM with welding welding wireThe rotation of feed rolls 5a and being fed in welding torch WT with welding welding wire feeding speed Ws, and withBetween mother metal 2, produce sacrificial electrode electric arc 3a. Filler wire 1b by with filler wire feeding electricityFiller wire that motivation FM is coupled with the rotation of feed rolls 5b with filler wire feed speed FsBe fed in feeding guider 4b, and inserted with the state contacting with the latter half of molten bath 2aEnter. The weld part of this figure represents the state between stationary phase. For the weld part during arc crater, afterIn Fig. 4, narrate.
Between welding welding wire 1a and mother metal 2, apply weldingvoltage Vww, welding current Iww is disappearingIn power pole electric arc 3a, switch on. In the figure, welding direction in left to. By in advanceSacrificial electrode electric arc 3a form molten bath 2a. Between filler wire 1b and mother metal 2, do not apply voltage,Also no power electric current. Filler wire 1b is inserted under the state contacting with the latter half of molten bath 2aEnter, by being melted from the heat of molten bath 2a. Filler wire 1b is fed to sacrificial electrode electricityOutside the generating unit of arc 3a. This is because as described above, prevents that filler wire 1b from passing through sacrificial electrodeElectric arc 3a is by the cause of direct melting. The advancing angle of welding welding wire 1a is the scope of 0～30 ° of degree,It in this figure, is the situation of plane (0 °). The advancing angle of filler wire 1b is the scope of 20～50 °. ?Filler wire 1b is tiltedly being inserted in forward direction.
Represent the center line of the direction of feed that welding welding wire 1a is shown with single-point line, this center line withThe mother metal 2 crossing points in surface become welding target position a. The insertion position of filler wire 1b becomes surelyRegularly, use insertion position b. Between this stationary phase, be set in specific consumption electrode with insertion position bMore rear and than the rear end of molten bath 2a more in the scope in front of the generating unit of electric arc 3a. WelderingMeet target location a and become distance between weldingwires from Lw by the distance between the b of insertion position between stationary phase(mm). As mentioned above, this distance between weldingwires is established from setting signal Lwr according to distance between weldingwires from LwFixed.
Source of welding current PS is by applying between welding welding wire 1a and mother metal 2 via power supply chip 4aWeldingvoltage Vww, thus the power supply for the welding current Iww that switches on become. From source of welding current PSWelding welding wire is sent to welding welding wire feeding control signal Wc with feed motor WM, control weldingWelding wire feeding speed Ws, and filler wire is sent to filler wire feeding with feed motor FMControl signal Fc, controls filler wire feed speed Fs. In addition, source of welding current PS will be used for settingDistance between weldingwires between welding welding wire 1a and filler wire 1b is from the above-mentioned distance between weldingwires of Lw from settingSignal Lwr outputs to above-mentioned filler wire travel mechanism 6. From source of welding current PS via for battery coreWhen sheet 4a applies weldingvoltage Vww, welding welding wire 1a is in+side. Source of welding current PS is with commonBe similarly the power supply of constant-voltage characteristic. Therefore, welding current Iww is according to welding welding wire feeding speed WsDetermine its value.
Robot controller RC by initiating signal On and arc crater during signal Tcs output toState source of welding current PS. Initiating signal On becomes between stationary phase and during arc crater the high level during this,Control output and the feeding of the source of welding current. If welding torch WT arrives welding starting position, startingSignal On is in high level, starts the output of source of welding current PS, and start to weld welding wire 1a withAnd the feeding of filler wire 1b, thereby start the welding between stationary phase. If welding torch WT arrives arcPosition (welding end position) is processed in hole, during predetermined arc crater during this, during arc crater, believesNumber Tcs is in high level. Corresponding, at the output resume of source of welding current PS and produced and disappearUnder the state of power pole electric arc 3a, the feed speed of welding welding wire 1a is changed to entering of using during arc craterThe speed of giving. Meanwhile, the feed speed of filler wire 1b is also changed to the feed speed of using during arc crater.Distance between weldingwires in during arc crater is set to than short-and-medium between stationary phase from Lw. Thus, during arc craterIn the insertion position of filler wire become the inside of the generating unit of sacrificial electrode electric arc 3a, fill welderingSilk 1b is by the directly melting of sacrificial electrode electric arc 3a quilt. If initiating signal On is changed to low level,The output of source of welding current PS stops and sacrificial electrode electric arc 3a extinguishing arc, welds welding wire 1a and fills outThe feeding of filling welding wire 1b also stops. Thus, welding finishes. During above-mentioned arc crater by being stored in machineOperation procedure in device people control device RC and being set. During arc crater, welding torch WT is in stoppingOnly state. Robot controller RC carries out the moving of robot (diagram is omitted) according to operation procedureControl.
Fig. 2 is the block diagram of the source of welding current PS of the welder described in pie graph 1. Below, ginsengAccording to this figure, each module is described.
Electric power main circuit PM using the source power supply (diagram is omitted) of 3 phase 200V etc. as inputting,Carry out the output control of inverter control etc. according to driving signal Dv described later, output weldingvoltageVww and welding current Iww. Although this electric power main circuit PM diagram has been omitted, and possesses:To source power supply carry out No. 1 rectification circuit of rectification, smoothly the direct current that is rectified capacitor, by instituteLevel and smooth DC converting is the inverter circuit of high-frequency ac, high-frequency ac is depressured to and is suitable for arc weldingThe inverter transformer (invertertransformer) of the magnitude of voltage connecing, to being entered by the high-frequency ac of step-downThe reactor of No. 2 rectification circuits of row rectification and the direct current being smoothly rectified. 1a is logical for welding welding wireThe rotation of crossing the welding welding wire feed rolls 5a being coupled with welding welding wire feed motor WM comesBe powered while be fed in power supply chip 4a, and and mother metal 2 between produce sacrificial electrodeElectric arc 3a. Filler wire 1b is by the filling weldering being coupled with feed motor FM with filler wireSilk is fed in feeding guider 4b with the rotation of feed rolls 5b, and is inserted into molten bath. FillWelding wire travel mechanism 6 adjusts the insertion position of filler wire 1b. Structure Fig. 1 described above of welding torchShown in, but illustrate simplifiedly at this.
Voltage detecting circuit VD detects above-mentioned weldingvoltage Vww voltage sense signal Vd.Average voltage calculates circuit VAV by this voltage detection signal Vd is passed into low pass filter(cut-off frequency 1～10Hz degree) averages (smoothing), and output voltage average value letterNumber Vav.
Between stationary phase, export between predetermined stationary phase and use weldingvoltage with weldingvoltage initialization circuit VSRSetting signal Vsr. During exporting predetermined arc crater with weldingvoltage initialization circuit VCR during arc crater, useWeldingvoltage setting signal Vcr. Voltage commutation circuit SV is to establish with weldingvoltage between above-mentioned stationary phaseDetermine during signal Vsr, above-mentioned arc crater with weldingvoltage setting signal Vcr and from robot controlDuring the arc crater of device RC processed, signal Tcs is as input, and signal Tcs is low electricity during arc craterWhen flat (between stationary phase), during stable output, establish as weldingvoltage with weldingvoltage setting signal VsrDetermine signal Vr, use weldingvoltage setting signal export arc crater when high level (during arc crater) duringVcr is as weldingvoltage setting signal Vr. Voltage error amplifying circuit EV sets this weldingvoltageError between signal Vr and above-mentioned average voltage value signal Vav is amplified, and output voltage error is putLarge-signal Ev. By this circuit, the source of welding current becomes the power supply of constant-voltage characteristic. Drive circuit DV willThis voltage error amplifying signal Ev and from the initiating signal On conduct of robot controller RCInput, and in the time that initiating signal On is high level (starting) (between stationary phase+arc crater during), baseIn voltage error amplifying signal, Ev carries out pulse width modulation control, and output is used for driving above-mentioned power supplyThe driving signal Dv of the inverter circuit in main circuit. By this circuit, source of welding current PS is stableBe output during this time and in during arc crater.
Between stationary phase, export between predetermined stationary phase and use with welding welding wire feeding Speed Setting circuit WSRWelding welding wire feeding rate setting signal Wsr. During arc crater, use welding welding wire feeding Speed Setting circuitWCR uses welding welding wire feeding rate setting signal Wcr during exporting predetermined arc crater. Feeding is switchedCircuit SW by aforementioned stable during with welding welding wire feeding rate setting signal Wsr, above-mentioned arc crater phaseBetween with welding welding wire feeding rate setting signal Wcr and from the arc of robot controller RCDuring hole, signal Tcs is as input, when during arc crater, signal Tcs is low level (between stationary phase)During stable output, use welding welding wire feeding rate setting signal Wsr as welding welding wire feeding speedSetting signal Wr, when high level (during arc crater), export arc crater during by welding welding wire feeding speedDegree setting signal Wcr is as welding welding wire feeding rate setting signal Wr. The control of welding welding wire feedingCircuit WC is by this welding welding wire feeding rate setting signal Wr and from robot controller RCInitiating signal On as input, in the time that initiating signal On is high level (starting), will be used forWith the feed speed feeding welding welding wire 1a being determined according to welding welding wire feeding rate setting signal WrWelding welding wire feeding control signal Wc output to above-mentioned welding welding wire feed motor WM.
Between stationary phase, export between predetermined stationary phase and use with filler wire feed speed initialization circuit FSRFiller wire feed speed setting signal Fsr. During arc crater, use filler wire feed speed initialization circuitFCR uses filler wire feed speed setting signal Fcr during exporting predetermined arc crater. The 2nd feeding is cutChange circuit SW2 by aforementioned stable during with filler wire feed speed setting signal Fsr, above-mentioned arc craterUse during this time filler wire feed speed setting signal Fcr and from robot controller RC'sDuring arc crater, signal Tcs, as input, is low level (between stationary phase) at signal Tcs during arc craterTime stable output during with filler wire feed speed setting signal Fsr as filler wire feed speedSetting signal Fr, uses filler wire feed speed during exporting arc crater when high level (during arc crater)Setting signal Fcr is as filler wire feed speed setting signal Fr. Filler wire feeding control circuitFC is by this filler wire feed speed setting signal Fr and rising from robot controller RCMoving signal On is as input, at initiating signal On when high level (starting), will be used forThe feed speed feeding filler wire 1b's determining according to filler wire feed speed setting signal FrFiller wire feeding control signal Fc outputs to above-mentioned filler wire feed motor FM.
Between stationary phase, export between predetermined stationary phase with between welding wire from initialization circuit LSR by distance between weldingwiresApart from setting signal Lsr. During arc crater, export predetermined arc crater by distance between weldingwires from initialization circuit LCRUse during this time distance between weldingwires from setting signal Lcr. Use welding wire apart from commutation circuit SL during by aforementioned stableDuring spacing setting signal Lsr, above-mentioned arc crater with distance between weldingwires from setting signal Lcr and fromDuring the arc crater of robot controller RC, signal Tcs is as input, signal Tcs during arc craterDuring for low level (between stationary phase), using between stationary phase, use distance between weldingwires from setting signal Lsr as welding wireSpacing setting signal Lwr outputs to above-mentioned filler wire travel mechanism 6, in high level (the arc crater phaseBetween) time during arc crater with distance between weldingwires from setting signal Lcr as distance between weldingwires from setting signalLwr outputs to above-mentioned filler wire travel mechanism 6.
Fig. 3 is the arc crater control method for two welding wire welding that embodiments of the present invention are relevant are describedFig. 1～Fig. 2 in the sequential chart of each signal. This figure (A) represents that the time of initiating signal On becomesChange, during this figure (B) expression arc crater, the time of signal Tcs changes, and this figure (C) represents welding electricityPress the time of Vww to change, this figure (D) represents the time variation of welding welding wire feeding speed Ws,This figure (E) represents the time variation of welding current Iww, and this figure (F) represents filler wire feedingThe time of speed Fs changes, and this figure (G) represents the time variation of distance between weldingwires from Lw. To fillingDuring stabilization and during arc crater, during these two, all do not apply voltage, electric current does not also flow welding wire 1bLogical. Below, describe with reference to this figure.
In the figure, moment t1 was between stationary phase in the past, welding torch WT with the speed of welding of being scheduled to alongSealing wire moves, and stablizes like that welding as described later. During moment t1～t2, beTc during predetermined arc crater, under the state having stopped, carrying out arc crater as described later like that at welding torch WTProcess. During arc crater, Tc is established according to kind, the material of mother metal etc. of joint geometry, welding welding wireBe decided to be 0.3～3.0 second degree. After moment t2, exist and carry out for preventing from welding the deposited of welding wireDuring short antiseized (anti-stick) of 50ms degree processes, but this release treatment and prior artIdentical, unrelated to the invention, therefore in this omission.
(1) between the stationary phase before moment t1
In between the stationary phase before moment t1, welding torch WT with the speed of welding of being scheduled to along sealing wireMobile. In between stationary phase, as shown in this figure (A), initiating signal On is in high level (starting),As shown in this figure (B), during arc crater, signal Tcs is in low level (between stationary phase). Initiating signalOn becomes high level, and during arc crater, signal Tcs becomes low level, therefore as this figure (C) instituteShow, from source of welding current PS output according to setting with weldingvoltage setting signal Vsr between stationary phaseThe weldingvoltage Vww of value. Initiating signal On is in high level, and signal Tcs place during arc craterIn low level, therefore, as shown in this figure (D), welding welding wire feeding speed Ws became by stationary phaseBetween the value that sets with welding welding wire feeding rate setting signal Wsr. As shown in this figure (E), rightThe welding current Iww that welding welding wire 1a switches on becomes and above-mentioned welding welding wire feeding speed WsCorresponding value. Be to apply the weldingvoltage Vww using between stationary phase between stationary phase, between stationary phaseWith stationary phase of welding current Iww energising between the sacrificial electrode electric arc 3a that uses welding welding wire 1a withBetween mother metal 2, produce. On the other hand, the initiating signal On between stationary phase is in high level, andAnd during arc crater signal Tcs is in low level, therefore as shown in this figure (F), filler wire feedingSpeed Fs becomes the value setting with filler wire feed speed setting signal Fsr by between stationary phase. ?Filler wire 1b is fed under the state contacting with the latter half of molten bath 2a. In between stationary phaseFiller wire feed speed Fs be set to 10～30% degree of welding welding wire feeding speed Ws.The value of weldingvoltage Vww between stationary phase (is used weldingvoltage setting signal Vsr's between stationary phaseValue) be set to and weld that welding wire feeding speed Ws is corresponding and sacrificial electrode electric arc 3a stablizes real estateRaw. In addition, during arc crater signal Tcs in low level, therefore as shown in this figure (G), welding wireSpacing Lw becomes the value setting from setting signal Lsr by distance between weldingwires by between stationary phase. This is steadyRegularly with distance between weldingwires from the value of setting signal Lsr be set to than use distance between weldingwires during arc crater fromThe value of setting signal Lcr is long. Be distance between weldingwires from Lw according to arc crater during than side short between stationary phaseFormula is adjusted automatically by filler wire travel mechanism 6.
(2) Tc during arc crater
Moment t1, processes position (welding end position) if welding torch WT arrives arc crater, stopsMobile, become Tc during arc crater the specified time limit of moment t1～t2 during this. During arc crater in Tc,As shown in this figure (A), initiating signal On becomes high level, as shown in this figure (B), and the arc crater phaseBetween signal Tcs in high level. Initiating signal On is in high level, and signal Tcs during arc craterIn high level, therefore, as shown in this figure (C), export according to using during arc crater from source of welding current PSThe weldingvoltage Vww of the value that weldingvoltage setting signal Vcr sets. Initiating signal On is in heightLevel, and during arc crater, signal Tcs is in high level, and therefore, as shown in this figure (D), welding is weldedSilk feed speed Ws becomes according to set with welding welding wire feeding rate setting signal Wcr during arc craterFixed value, becomes than speed slow between stationary phase. As shown in this figure (E), to welding welding wire, 1a entersThe welding current Iww that works electric becomes the value corresponding with above-mentioned welding welding wire feeding speed Ws, becomesFor the value than little between stationary phase. Be during arc crater in Tc, apply the weldingvoltage Vww using during arc crater,The welding current Iww using during energising arc crater, the sacrificial electrode electric arc 3a using during arc crater is in weldingBetween welding wire 1a and mother metal 2, produce. On the other hand, initiating signal On is in high level, and arcDuring hole, signal Tcs is in high level, therefore as shown in this figure (F), and filler wire feed speedFs becomes the value setting with filler wire feed speed setting signal Fcr according to during arc crater, becomesThan speed slow between stationary phase. In addition, during arc crater, signal Tcs is in high level, therefore as this figure(G), shown in, distance between weldingwires becomes according to using distance between weldingwires from setting signal Lcr during arc crater from LwThe value setting, than short between stationary phase. Be that distance between weldingwires shortens from Lw, the insertion of filler wire 1bThe inside of the generating unit of position in sacrificial electrode electric arc 3a, therefore filler wire 1b is by consuming electricityPole electrical arc 3a carries out melting and is inserted into molten bath. Therefore, during arc crater, in Tc, during arc crater, useSacrificial electrode electric arc 3a and distance between weldingwires shorten from Lw, weld by the filling being melted by electric arcArc crater processing is carried out in the insertion of silk 1b. The maximum difference of Tc exists between stationary phase and during arc craterLength in distance between weldingwires from Lw, filler wire 1b is carried out melting or is not carried out melting by electric arc.Distance between weldingwires between stationary phase is set to 3～7mm degree from Lw, the welding wire in during arc craterSpacing Lw is set to than its short 2～3mm degree. Distance between weldingwires from Lw according to welding, welderingMeet speed, joint geometry, welding welding wire feeding speed Fs etc. and be set to appropriate value. The arc crater phaseBetween welding welding wire feeding speed Ws in Tc be 40～70% degree between stationary phase. And, arcFiller wire feed speed Fs during hole in Tc is the welding welding wire feeding speed in Tc during arc crater20～50% degree of degree Ws. Therefore, the welding welding wire feeding speed Ws ratio in Tc during arc craterSlow between stationary phase. Filler wire feed speed Fs during arc crater in Tc is than slow between stationary phase.And then, the filler wire feed speed Fs during arc crater in Tc than arc crater during welding weldering in TcWs is slow for silk feed speed. The value of weldingvoltage Vww during arc crater in Tc (is used weldering during arc craterConnect the value of voltage setting signal Vcr) be set to weld welding wire feeding speed Ws corresponding and disappearPower pole electric arc 3a stably produces.
At moment t2, if Tc finishes during arc crater, described above, during release treatment, omit,Therefore as shown in this figure (A), initiating signal On becomes low level (stopping). As this figure (B)Shown in, during arc crater, signal Tcs becomes low level. Initiating signal On becomes low level, therefore comesFrom the output of welding power ps, in halted state, welding welding wire 1a and filler wire 1b enterAlso stopped. Its result, sacrificial electrode electric arc 3a extinguishing arc. Thus, welding finishes. And, timeCarve after t2 signal Tcs during arc crater and turn back to low level, therefore as shown in this figure (G), welding wireSpacing Lw turn back to by the value setting from setting signal Lsr by distance between weldingwires between stationary phase (timeCarve t1 value in the past).
Fig. 4 is the figure of the weld part in representing during arc crater. Equally, with above-mentioned Fig. 1 in stableWeld part is during this time corresponding. Below, describe with reference to this figure.
During arc crater, welding torch WT stops. Welding welding wire 1a by with welding welding wire feeding electricityWelding welding wire that motivation WM is coupled with the rotation of feed rolls 5a with welding welding wire feeding speedWs is fed in welding torch WT, and and mother metal 2 between produce sacrificial electrode electric arc 3a. As aboveDescribed, to use during applying arc crater between welding welding wire 1a and mother metal 2 weldingvoltage Vww,The welding welding wire feeding speed Ws that welding welding wire 1a uses during with arc crater be fed and the arc crater of switching on duringWith welding current Iww, produce the sacrificial electrode electric arc 3a using during arc crater.
Filler wire 1b uses by the filler wire being coupled with feed motor FM with filler wireThe rotation of feed rolls 5b is fed in feeding guider 4b with filler wire feed speed Fs, andDuring being inserted into arc crater, use insertion position c. Between filler wire 1b and mother metal 2, do not apply electricityPress also no power electric current in filler wire 1b. The filling weldering that filler wire 1b uses during with arc craterSilk feed speed Fs is fed. During arc crater, be set at than using and insert between stationary phase with insertion position cThe position (position in front) of the more close welding target of implantation site b position a. Welding target position aAnd the distance between the insertion position of filler wire 1b is that distance between weldingwires becomes during arc crater from LwA-c spacing, during stabilization becomes a-b spacing. Therefore, distance between weldingwires from Lw in the arc crater phaseBetween in than short-and-medium between stationary phase. During arc crater, be set as being inserted into sacrificial electrode electricity with insertion position cThe inside of the generating unit of arc 3a. This is because filler wire 1b is straight by sacrificial electrode electric arc 3aConnect the cause of melting. Therefore, the front end of filler wire 1b and molten bath 2a in contact condition and/Or contactless state.
In the present embodiment, between stationary phase in, filler wire is inserted into specific consumption with contact conditionThe end that the generating unit of electrode arc is positioned at Qie Bi molten bath, rear is positioned between stationary phase in front with insertingPosition. Therefore, as implied above, in the present embodiment, molten bath is by cooling efficiently, and passes throughFiller wire suppresses molten bath latter half and can suppress the formation of humping weld. Keeping this effectState under, in the present embodiment, during arc crater in, filler wire is inserted into and is compared stationary phaseBetween with during the arc crater of more close front, insertion position the inside in sacrificial electrode electric arc with insertPosition. Thus, even thereby due to arc crater process and the value of welding current diminish molten bath temperature reduce,Also can be by filler wire melting fully, also can feeding filler wire in therefore during arc crater, canShorten the arc crater processing time.
According to above-mentioned embodiment, continuing the generation of electric arc and filler wire in during arc craterUnder the state of feeding, make to weld distance between weldingwires between welding wire and filler wire from than short-and-medium between stationary phase,Carry out thus arc crater processing. Thus, even the welding of electric arc being switched on due to arc crater processingThe value of electric current diminishes and the temperature in molten bath reduces, and also filler wire can be passed through to the direct melting of electric arc, because ofThis during arc crater in filler wire also can feeding, can shorten arc crater and process the needed time. ItsAs a result, enhance productivity.
The explanation of symbol
Claims (2)
1. an arc crater control method for two welding wire welding, this pair of wire welding connected during stabilizationIn, between welding welding wire and mother metal, produce electric arc, and the molten bath forming by this electric arc is enteredCarry out to filler wire, the arc crater control method of described pair of welding wire welding is characterised in that,
During arc crater, at the state that continues the generation of above-mentioned electric arc and the feeding of above-mentioned filler wireUnder, make distance between weldingwires between above-mentioned welding welding wire and above-mentioned filler wire from than in during aforementioned stableShort, carry out thus arc crater processing.
2. the arc crater control method of according to claim 1 pair of welding wire welding, is characterized in that,
The feed speed of the above-mentioned welding welding wire in making during above-mentioned arc crater than aforementioned stable during inFeed speed is slow, and the feed speed of the above-mentioned filler wire in making during above-mentioned arc crater is than the aforementioned stable phaseBetween in feed speed slow, the feed speed of the above-mentioned filler wire in making during above-mentioned arc crater is than above-mentionedThe feed speed of the above-mentioned welding welding wire in during arc crater is slow.
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| JP2011215804A JP5863365B2 (en) | 2011-09-30 | 2011-09-30 | Two-wire welding crater control method |
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| JP6425588B2 (en) * | 2015-03-09 | 2018-11-21 | 株式会社ダイヘン | Crater control method for 2-wire welding |
| CN109175610B (en) * | 2018-10-11 | 2021-04-20 | 南京钢铁股份有限公司 | Gas shielded welding method for marine thin plate |
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| CN101116925A (en) * | 2006-07-31 | 2008-02-06 | 株式会社大亨 | Double-wire feeding arc welding method and multi-layer surfacing method |
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| JP5863365B2 (en) | 2016-02-16 |
| JP2013075303A (en) | 2013-04-25 |
| CN103028812A (en) | 2013-04-10 |
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