CN103028812A - Arc crater control method for double-solder-wire soldering - Google Patents
Arc crater control method for double-solder-wire soldering Download PDFInfo
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Abstract
The present invention relates to an arc crater control method for double-solder-wire soldering, which can shorten arc crater processing time. During a stable period (before time t1) of double-solder-wire soldering, a soldering voltage (Vww) is applied between a soldering wire and a base material, a soldering current (Iww) is switched on to generate arc, and a filling soldering wire is contacted with a melting pool formed by the arc and simultaneously fed (Fs). In the arc crater control method for double-solder-wire soldering, during arc crater period (Tc), the distance between the soldering wire and the filling soldering wire is shortened than that during the stable period, thereby performing arc crater processing. Therefore, even if the value of the soldering current (Iww) for switching on the arc is reduced due to the arc crater processing and the temperature of the melting pool is reduced, the arc can directly melt the filling soldering wire, thereby feeding (Fs) the filling soldering wire during the arc crater processing period and shortening the time required by arc crater processing.
Description
Technical field
Arc crater (crater) control method of two welding wire welding that the molten bath feeding filler wire that the present invention relates to that sacrificial electrode electric arc is produced carries out.
Background technology
Make filler wire carry out two welding wire welding methods that feeding is carried out while contacting by the formed molten bath of sacrificial electrode electric arc, since use welding welding wire and these two kinds of welding wires of filler wire of sacrificial electrode electric arc, therefore good aspect high-speed welding and high deposited property.Especially, when adopting two welding wire welding methods to carry out high-speed welding, in order to prevent becoming humping weld (bumping bead), more to contact feeding with the molten bath be important at the rear from sacrificial electrode electric arc to make filler wire.This is to carry out melting because if filler wire is fed in the generating unit of sacrificial electrode electric arc, then the cooling effect in molten bath diminishes, and owing to the protuberance that can not suppress the latter half in molten bath by filler wire, thereby the cause that the effect of inhibition humping weld does not almost have.Relative therewith, if make the latter half in the outer molten bath of filler wire and the generating unit of electric arc contact feeding, and carry out melting by the heat in molten bath, then the molten bath is cooled efficiently, and suppresses the molten bath latter half by filler wire and can suppress the formation of humping weld.In the following description, the welding wire of sacrificial electrode electric arc is recited as the welding welding wire, distinguishes with filler wire.As the welding that produces sacrificial electrode electric arc, use co3 gas arc welding connection, MAG (protection of consumable electrode active gases) welding, MIG (consumable electrode noble gas protective) welding, pulse MAG welding connection, pulse MIC welding connection, sacrificial electrode alternating-current pulse arc-welding process etc.。
When the welding of two welding wire welding finishes, under the state that welding torch is stopped, stopping the feeding of filler wire and carry out the arc crater processing by sacrificial electrode electric arc.Stop in during arc crater filler wire feeding the reasons are as follows described.During the arc crater, in order to form sound arc crater section, make the feed speed of welding welding wire than slow 40～70% degree between stationary phase.Its result, because the value of the welding current of energising sacrificial electrode electric arc also diminishes, so the temperature in molten bath is also than reducing between stationary phase.Therefore, if in during arc crater filler wire is fed into the molten bath, then can not carry out fully melting, this is because there is the cause that is in the bad situation of melting.Therefore, in the welding of two welding wires, stopping the feeding of filler wire in during the arc crater and only being undertaken by sacrificial electrode electric arc that arc crater processes is general situation (reference example such as patent documentation 1).At this, so-called arc crater process be welding torch arrive the welding end position and the state that stopped under, the molten bath under the state that is in depression owing to electric arc filled the situation that welding wire forms sound welding bead section of welding.
Patent documentation 1JP JP 2009-154173 communique
Summary of the invention
Such as mentioned above, in the two welding wires welding of prior art, stop the feeding of filler wire in during the arc crater and the sacrificial electrode electric arc that only produces by the welding welding wire carries out arc crater and processes.As above such, process if only carry out arc crater by the welding welding wire, then the arc crater section filling motlten metal that caves in being formed sound welding bead needs spended time.Two welding wire welding can be carried out high-speed welding, have the high feature of production efficiency.In order further to improve this speciality, need to shorten arc crater and process the needed time.
At this, the object of the present invention is to provide a kind of arc crater control method that arc crater is processed two welding wires welding of needed time that in two welding wires weld, can shorten.
In order to solve above-mentioned problem, the invention of technical scheme 1 is the arc crater control method of a kind of pair of welding wire welding, during connecting during stabilization, this pair wire welding between welding welding wire and mother metal, produced electric arc, and to being undertaken by the formed molten bath feeding of this electric arc filler wire, the arc crater control method of this pair welding wire welding is characterised in that, in during the arc crater, under the state of the feeding of the generation that continues above-mentioned electric arc and above-mentioned filler wire, make distance between weldingwires between above-mentioned welding welding wire and the above-mentioned filler wire from than short-and-medium during the aforementioned stable, carry out thus arc crater and process.
The invention of technical scheme 2 is arc crater control methods of the two welding wire welding on the basis of technical scheme 1, it is characterized in that, the feed speed of the above-mentioned welding welding wire in making during the above-mentioned arc crater than aforementioned stable during in feed speed slow, the feed speed of the above-mentioned filler wire in making during the above-mentioned arc crater than aforementioned stable during in feed speed slow, the feed speed of the above-mentioned filler wire in making during the above-mentioned arc crater 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 the arc crater in, under the state of the feeding of the generation that continues electric arc and filler wire, make distance between weldingwires between welding welding wire and the filler wire from processing than the shorter arc crater that carries out between stationary phase.Thus, even the value of the welding current of electric arc being switched on because arc crater is processed diminishes and the temperature in molten bath reduces, also can be by electric arc with the direct melting of filler wire, so also can the feeding filler wire in during the arc crater, can shorten arc crater and process the needed time.Its result enhances productivity.
Description of drawings
Fig. 1 is the structure chart for the welder of the arc crater control method of implementing the relevant two welding wires welding of embodiments of the present invention.
Fig. 2 is the block diagram of the source of welding current PS of the welder described in the pie graph 1.
Fig. 3 is the sequential chart for each signal of Fig. 1～Fig. 2 of the arc crater control method of the relevant two welding wires welding of explanation embodiments of the present invention.
Fig. 4 for the expression arc crater during in the figure of weld part.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are described.
Fig. 1 is the structure chart for the welder of the arc crater control method of implementing the relevant two welding wires welding of embodiments of the present invention.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 controller RC and robot (diagram is omitted).Welding torch WT possesses for the power supply chip 4a that welding welding wire 1a is powered, feeding guider 4b and the filler wire travel mechanism 6 that is used for filler wire 1b is directed to the insertion position.Filler wire travel mechanism 6 is for comprising with distance between weldingwires described later from setting signal Lwr as input, the insertion position of filler wire 1b moved up and the mechanism of motor that distance between weldingwires is automatically adjusted from Lw in the front and back of welding direction according to the value of this setting signal Lwr.As this mechanism, adopted by slider crank mechanism rotatablely moving of motor is transformed to straight-line mechanism, rotatablely moving of motor is transformed to the mechanism of swing movement etc. by crank and jack back in the past.Protective gas (diagram is omitted) from the mist of the ejection of the front end of welding torch WT carbon dioxide, carbon dioxide and argon gas etc.Welding torch WT is held by robot (diagram is omitted), and is moved along sealing wire according to the operation procedure that is stored in the robot controller RC.
Welding welding wire 1a is by being fed in the welding torch WT to weld welding wire feeding speed Ws with the rotation of feed rolls 5a with the welding welding wire that feed motor WM is coupled with the welding welding wire, and and mother metal 2 between generation sacrificial electrode electric arc 3a.Filler wire 1b is by being fed in the feeding guider 4b with filler wire feed speed Fs with the rotation of feed rolls 5b with the filler wire that feed motor FM is coupled with filler wire, and to be inserted into the contacted state of the latter half of molten bath 2a.The weld part of this figure represents the state between stationary phase.For the weld part during the arc crater, the back is narrated in Fig. 4.
Apply weldingvoltage Vww between welding welding wire 1a and mother metal 2, welding current Iww switches in sacrificial electrode electric arc 3a.In the figure, welding direction be in left to.Form molten bath 2a by the sacrificial electrode electric arc 3a that goes ahead of the rest.Between filler wire 1b and mother metal 2, do not apply voltage, the no power electric current yet.Filler wire 1b with the contacted state of the latter half of molten bath 2a under be inserted into, be melted by the heat from molten bath 2a.Filler wire 1b is fed to outside the generating unit of sacrificial electrode electric arc 3a.This is because as described above, prevents that filler wire 1b is by the cause of the direct melting of sacrificial electrode electric arc 3a quilt.The advancing angle of welding welding wire 1a is the scope of 0～30 ° of degree, is the situation of plane (0 °) among this figure.The advancing angle of filler wire 1b is 20～50 ° scope.Be that filler wire 1b is inserted in oblique the place ahead direction.
Represent to illustrate the center line of the direction of feed of welding welding wire 1a with single-point line, the crossing points in this center line and mother metal 2 surfaces become welding target position a.The insertion position of filler wire 1b becomes uses insertion position b between stationary phase.Be set at the generating unit rear and than the rear end of molten bath 2a more in the scope in the place ahead more that is in specific consumption electrode arc 3a with insertion position b between this stationary phase.Welding target position a and become distance between weldingwires from Lw (mm) with the distance between the b of insertion position between stationary phase.As mentioned above, this distance between weldingwires is set from setting signal Lwr according to distance between weldingwires from Lw.
Source of welding current PS is by applying weldingvoltage Vww via power supply chip 4a between welding welding wire 1a and mother metal 2, thereby becomes the power supply for the welding current Iww that switches on.From the source of welding current PS welding welding wire is sent welding welding wire feeding control signal Wc with feed motor WM, control welding welding wire feeding speed Ws, and filler wire is sent filler wire feeding control signal Fc with feed motor FM, control filler wire feed speed Fs.In addition, source of welding current PS will output to above-mentioned filler wire travel mechanism 6 for setting distance between weldingwires between welding welding wire 1a and the filler wire 1b from the above-mentioned distance between weldingwires of Lw from setting signal Lwr.When applying weldingvoltage Vww from source of welding current PS via power supply chip 4a, welding welding wire 1a is in+side.Source of welding current PS and the power supply that usually is similarly constant-voltage characteristic.Therefore, welding current Iww determines its value according to welding welding wire feeding speed Ws.
Robot controller RC with initiating signal On and arc crater during signal Tcs output to above-mentioned source of welding current PS.Initiating signal On becomes between stationary phase and the high level during this during the arc crater, output and the feeding of the control source of welding current.If welding torch WT arrives the welding starting position, then initiating signal On is in high level, begins the output of source of welding current PS, and the feeding that begins to weld welding wire 1a and filler wire 1b, thereby begins the welding between stationary phase.If welding torch WT arrives arc crater and processes position (welding end position), then during the predetermined arc crater during this, signal Tcs is in high level during the arc crater.Corresponding, produced under the state of sacrificial electrode electric arc 3a at the output resume of source of welding current PS, the feed speed of welding welding wire 1a is changed to the feed speed of using during the arc crater.Simultaneously, the feed speed of filler wire 1b also is changed to the feed speed of using during the arc crater.Distance between weldingwires in during the arc crater is set to than short-and-medium between stationary phase from Lw.Thus, the insertion position of the filler wire in during the arc crater becomes the inside of the generating unit of sacrificial electrode electric arc 3a, filler wire 1b by sacrificial electrode electric arc 3a by directly melting.If initiating signal On is changed to low level, then the output of source of welding current PS stops and sacrificial electrode electric arc 3a extinguishing arc, and the feeding of welding welding wire 1a and filler wire 1b also stops.Thus, welding finishes.Be set by the operation procedure that is stored among the robot controller RC during the above-mentioned arc crater.During the arc crater, welding torch WT is in halted state.Robot controller RC carries out the action control of robot (diagram is omitted) according to operation procedure.
Fig. 2 is the block diagram of the source of welding current PS of the welder described in the pie graph 1.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 weldingvoltage Vww and welding current Iww with the source power supply (diagram is omitted) of 3 phase 200V etc.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, the direct current that smoothly is rectified capacitor, with level and smooth DC converting be high-frequency ac inverter circuit, with high-frequency ac be depressured to the inverter transformer (inverter transformer) of the magnitude of voltage that is suitable for arc welding, to the reactor of No. 2 rectification circuits being carried out rectification by the high-frequency ac of step-down and the direct current that smoothly is rectified.Welding welding wire 1a is fed in the power supply chip 4a while being powered by the rotation with feed rolls 5a of the welding welding wire that is coupled with feed motor WM with the welding welding wire, and and mother metal 2 between generation sacrificial electrode electric arc 3a.Filler wire 1b is fed in the feeding guider 4b by the rotation with feed rolls 5b of the filler wire that is coupled with feed motor FM with filler wire, and is inserted into the molten bath.Filler wire travel mechanism 6 adjusts the insertion position of filler wire 1b.The structure of welding torch is described above shown in Figure 1, but illustrates simplifiedly at this.
Voltage detecting circuit VD detects above-mentioned weldingvoltage Vww and voltage sense signal Vd.Average voltage is calculated circuit VAV and is averaged (smoothing) by this voltage detection signal Vd being passed into low pass filter (cut-off frequency 1～10Hz degree), and output voltage average value signal Vav.
Use weldingvoltage setting signal Vsr between the stationary phase of being scheduled to weldingvoltage initialization circuit VSR output between stationary phase.Use weldingvoltage setting signal Vcr during the arc crater of being scheduled to weldingvoltage initialization circuit VCR output during the arc crater.Voltage commutation circuit SV with between above-mentioned stationary phase with during weldingvoltage setting signal Vsr, the above-mentioned arc crater with weldingvoltage setting signal Vcr and from signal Tcs during the arc crater of robot controller RC as input, and signal Tcs is that low level uses weldingvoltage setting signal Vsr as weldingvoltage setting signal Vr during the stable output when (between stationary phase) during arc crater, uses weldingvoltage setting signal Vcr as weldingvoltage setting signal Vr when high level (during the arc crater) during the output arc crater.Voltage error amplifying circuit EV amplifies the error between this weldingvoltage setting signal Vr and the above-mentioned average voltage value signal Vav, and output voltage error amplifying signal Ev.By this circuit, the source of welding current becomes the power supply of constant-voltage characteristic.Drive circuit DV with this voltage error amplifying signal Ev and from the initiating signal On of robot controller RC as input, and when initiating signal On is high level (starting) (between stationary phase+arc crater during), carry out pulse width modulation control based on voltage error amplifying signal Ev, output is used for driving the driving signal Dv of the inverter circuit in the above-mentioned electric power main circuit.By this circuit, source of welding current PS during stabilization and in during the arc crater is output.
Use welding welding wire feeding rate setting signal Wsr between the stationary phase of being scheduled to welding welding wire feeding Speed Setting circuit WSR output between stationary phase.Use welding welding wire feeding rate setting signal Wcr during the arc crater of being scheduled to welding welding wire feeding Speed Setting circuit WCR output during the arc crater.Feeding commutation circuit SW with aforementioned stable during with welding welding wire feeding rate setting signal Wsr, use welding welding wire feeding rate setting signal Wcr during the above-mentioned arc crater, and from signal Tcs during the arc crater of robot controller RC as input, signal Tcs is that low level uses welding welding wire feeding rate setting signal Wsr as welding welding wire feeding rate setting signal Wr during the stable output when (between stationary phase) during arc crater, uses during the output arc crater when high level (during the arc crater) and welds welding wire feeding rate setting signal Wcr as welding welding wire feeding rate setting signal Wr.Welding welding wire feeding control circuit WC will weld welding wire feeding rate setting signal Wr and from the initiating signal On of robot controller RC as input, when initiating signal On is high level (starting), will output to above-mentioned welding welding wire feed motor WM for the welding welding wire feeding control signal Wc that welds welding wire 1a with the feed speed feeding that is determined according to welding welding wire feeding rate setting signal Wr.
Use filler wire feed speed setting signal Fsr between the stationary phase of being scheduled to filler wire feed speed initialization circuit FSR output between stationary phase.Use filler wire feed speed setting signal Fcr during the arc crater of being scheduled to filler wire feed speed initialization circuit FCR output during the arc crater.The 2nd feeding commutation circuit SW2 with aforementioned stable during with filler wire feed speed setting signal Fsr, use filler wire feed speed setting signal Fcr during the above-mentioned arc crater, and from signal Tcs during the arc crater of robot controller RC as input, signal Tcs is that low level uses filler wire feed speed setting signal Fsr as filler wire feed speed setting signal Fr during the stable output when (between stationary phase) during arc crater, uses filler wire feed speed setting signal Fcr as filler wire feed speed setting signal Fr when high level (during the arc crater) during the output arc crater.Filler wire feeding control circuit FC with this filler wire feed speed setting signal Fr and from the initiating signal On of robot controller RC as input, when initiating signal On is in high level (starting), will output to above-mentioned filler wire feed motor FM for the filler wire feeding control signal Fc with the feed speed feeding filler wire 1b that determined according to filler wire feed speed setting signal Fr.
Use distance between weldingwires from setting signal Lsr with distance between weldingwires between the stationary phase that initialization circuit LSR output is scheduled between stationary phase.During the predetermined arc crater of initialization circuit LCR output, use distance between weldingwires from setting signal Lcr with distance between weldingwires during the arc crater.Apart from commutation circuit SL with aforementioned stable during with distance between weldingwires from setting signal Lsr, use distance between weldingwires from setting signal Lcr during the above-mentioned arc crater, and from signal Tcs during the arc crater of robot controller RC as input, signal Tcs is that low level will output to above-mentioned filler wire travel mechanism 6 as distance between weldingwires from setting signal Lwr from setting signal Lsr with distance between weldingwires between stationary phase when (between stationary phase) during arc crater, outputs to above-mentioned filler wire travel mechanism 6 as distance between weldingwires from setting signal Lwr from setting signal Lcr with distance between weldingwires during with arc crater when high level (during the arc crater).
Fig. 3 is the sequential chart for each signal of Fig. 1～Fig. 2 of the arc crater control method of the relevant two welding wires welding of explanation embodiments of the present invention.The time of this figure (A) expression initiating signal On changes, the time of signal Tcs changes during this figure (B) expression arc crater, the time of this figure (C) expression weldingvoltage Vww changes, the time of this figure (D) expression welding welding wire feeding speed Ws changes, the time of this figure (E) expression welding current Iww changes, the time of this figure (F) expression filler wire feed speed Fs changes, and this figure (G) expression distance between weldingwires is from the time variation of Lw.To filler wire 1b during stabilization and all do not apply voltage during the arc crater during these two, electric current does not circulate yet.Below, describe with reference to this figure.
In the figure, t1 was between stationary phase in the past constantly, and welding torch WT moves along sealing wire with predetermined speed of welding, and stablizes like that welding as described later.Constantly t1～t2 during be Tc during the predetermined arc crater, under the state that welding torch WT has stopped, carrying out like that as described later arc crater and process.Tc is set to 0.3～3.0 second degree according to joint geometry, the kind of welding welding wire, the material of mother metal etc. during the arc crater.Behind moment t2, have that antiseized (anti-stick) carry out be used to the weak point of the deposited 50ms degree that prevents from welding welding wire process during, but this release treatment is same as the prior art, and is irrelevant with the present invention, therefore in this omission.
(1) between the stationary phase before the moment t1
In constantly between the stationary phase before the t1, welding torch WT moves along sealing wire with predetermined speed of welding.In between stationary phase, shown in this figure (A), initiating signal On is in high level (starting), and shown in this figure (B), signal Tcs is in low level (between stationary phase) during the arc crater.Initiating signal On becomes high level, and signal Tcs becomes low level during the arc crater, therefore shown in this figure (C), from the weldingvoltage Vww of source of welding current PS output according to the value that sets with weldingvoltage setting signal Vsr between stationary phase.Initiating signal On is in high level, and signal Tcs is in low level during the arc crater, and therefore shown in this figure (D), welding welding wire feeding speed Ws becomes the value that sets with welding welding wire feeding rate setting signal Wsr by between stationary phase.Shown in this figure (E), the welding current Iww that welding welding wire 1a is switched on becomes the value corresponding with above-mentioned welding welding wire feeding speed Ws.Be to apply the weldingvoltage Vww that uses between stationary phase between stationary phase, the sacrificial electrode electric arc 3a that uses between the stationary phase of the welding current Iww energising of using between stationary phase generation between welding welding wire 1a and mother metal 2.On the other hand, initiating signal On between stationary phase is in high level, and signal Tcs is in low level during the arc crater, and therefore shown in this figure (F), filler wire feed speed Fs becomes the value that sets with filler wire feed speed setting signal Fsr by between stationary phase.Be filler wire 1b with the contacted state of the latter half of molten bath 2a under be fed.Filler wire feed speed Fs between stationary phase is set to 10～30% degree of welding welding wire feeding speed Ws.The value of weldingvoltage Vww between stationary phase (between stationary phase with weldingvoltage setting signal Vsr value) is set to weld welding wire feeding speed Ws corresponding and sacrificial electrode electric arc 3a stably produces.In addition, signal Tcs is in low level during the arc crater, and therefore shown in this figure (G), distance between weldingwires becomes the value that sets from setting signal Lsr with distance between weldingwires by between stationary phase from Lw.Be set to than long from the value of setting signal Lcr with distance between weldingwires during the arc crater with the value of distance between weldingwires from setting signal Lsr between this stationary phase.Being distance between weldingwires is adjusted by filler wire travel mechanism 6 than mode short between stationary phase during according to arc crater automatically from Lw.
(2) Tc during the arc crater
Constantly t1 processes position (welding end position) if welding torch WT arrives arc crater, then stops mobilely, constantly becomes Tc during the arc crater specified time limit of t1～t2 during this.Among the Tc, shown in this figure (A), initiating signal On becomes high level during the arc crater, and shown in this figure (B), signal Tcs is in high level during the arc crater.Initiating signal On is in high level, and signal Tcs is in high level during the arc crater, therefore shown in this figure (C), from the weldingvoltage Vww of source of welding current PS output according to the value that sets with weldingvoltage setting signal Vcr during the arc crater.Initiating signal On is in high level, and signal Tcs is in high level during the arc crater, therefore shown in this figure (D), welding welding wire feeding speed Ws becomes the value that sets with welding welding wire feeding rate setting signal Wcr according to during the arc crater, becomes than speed slow between stationary phase.Shown in this figure (E), the welding current Iww that welding welding wire 1a is switched on becomes the value corresponding with above-mentioned welding welding wire feeding speed Ws, becomes than value little between stationary phase.Be during the arc crater among the Tc, apply the weldingvoltage Vww that uses during the arc crater, the welding current Iww that uses during the energising arc crater, the sacrificial electrode electric arc 3a that uses during arc crater generation between welding welding wire 1a and mother metal 2.On the other hand, initiating signal On is in high level, and signal Tcs is in high level during the arc crater, therefore shown in this figure (F), filler wire feed speed Fs becomes the value that sets with filler wire feed speed setting signal Fcr according to during the arc crater, becomes than speed slow between stationary phase.In addition, signal Tcs is in high level during the arc crater, and therefore shown in this figure (G), distance between weldingwires becomes the value that sets from setting signal Lcr with distance between weldingwires according to during the arc crater from Lw, than short between stationary phase.Be that distance between weldingwires shortens from Lw, the insertion position of filler wire 1b is in the inside of the generating unit of sacrificial electrode electric arc 3a, so filler wire 1b carries out melting and is inserted into the molten bath by sacrificial electrode electric arc 3a.Therefore, among the Tc, sacrificial electrode electric arc 3a and the distance between weldingwires used during the arc crater shorten from Lw during the arc crater, carry out arc crater by the insertion of the filler wire 1b that is melted by electric arc and process.The difference of maximum of Tc is distance between weldingwires from the length of Lw between stationary phase and during the arc crater, and filler wire 1b carries out melting or do not carry out melting by electric arc.Distance between weldingwires between stationary phase is set to 3～7mm degree from Lw, and the distance between weldingwires in during the arc crater is set to than its short 2～3mm degree from Lw.Distance between weldingwires is set to appropriate value from Lw according to welding, speed of welding, joint geometry, welding welding wire feeding speed Fs etc.Welding welding wire feeding speed Ws during the arc crater among the Tc is 40～70% degree between stationary phase.And the filler wire feed speed Fs during the arc crater among the Tc is 20～50% degree of the welding welding wire feeding speed Ws among the Tc during the arc crater.Therefore, during the arc crater welding welding wire feeding speed Ws among the Tc than slow between stationary phase.Filler wire feed speed Fs during the arc crater among the Tc is than slow between stationary phase.And then, the filler wire feed speed Fs during the arc crater among the Tc than arc crater during welding welding wire feeding speed Ws among the Tc slow.The value of weldingvoltage Vww during the arc crater among the Tc (during the arc crater with weldingvoltage setting signal Vcr value) is set to weld welding wire feeding speed Ws corresponding and sacrificial electrode electric arc 3a stably produces.
At moment t2, if Tc finishes during the arc crater, then as mentioned above, omit during the release treatment, therefore shown in this figure (A), initiating signal On becomes low level (stopping).Shown in this figure (B), signal Tcs becomes low level during the arc crater.Initiating signal On becomes low level, and therefore the output from source of welding current PS is in halted state, and the feeding of welding welding wire 1a and filler wire 1b also stops.Its result, sacrificial electrode electric arc 3a extinguishing arc.Thus, welding finishes.And signal Tcs turns back to low level during the later arc crater of t2 constantly, and therefore shown in this figure (G), distance between weldingwires turns back to by the value that sets from setting signal Lsr with distance between weldingwires between stationary phase (the constantly value before the t1) from Lw.
Fig. 4 for the expression arc crater during in the figure of weld part.Equally, with above-mentioned Fig. 1 in stationary phase between in weld part corresponding.Below, describe with reference to this figure.
During the arc crater, welding torch WT stops.Welding welding wire 1a is by being fed in the welding torch WT to weld welding wire feeding speed Ws with the rotation of feed rolls 5a with the welding welding wire that feed motor WM is coupled with the welding welding wire, and and mother metal 2 between generation sacrificial electrode electric arc 3a.Such as mentioned above, the weldingvoltage Vww that during applying arc crater between welding welding wire 1a and the mother metal 2, uses, 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 during the welding current Iww that uses, produce the sacrificial electrode electric arc 3a that uses during the arc crater.
In the present embodiment, between stationary phase in, the generating unit that filler wire is inserted into the specific consumption electrode arc with contact condition is positioned at the rear and is positioned at than the end in molten bath between stationary phase in the place ahead uses the insertion position.Therefore, as implied above, in the present embodiment, the molten bath is cooled off efficiently, and suppresses the formation that the molten bath latter half also can suppress humping weld by filler wire.Keeping under the state of this effect, in the present embodiment, during arc crater in, filler wire is inserted into than using the insertion position with more close the place ahead, insertion position and during being in the arc crater of inside of sacrificial electrode electric arc between stationary phase.Thus, even thereby the diminish temperature in molten bath of the value of welding current reduces because arc crater is processed, also can be with fully melting of filler wire, also can the feeding filler wire in therefore during arc crater, and can shorten the arc crater processing time.
According to above-mentioned embodiment, during the arc crater under the state of the feeding of the generation that continues electric arc and filler wire, make distance between weldingwires between welding welding wire and the filler wire from than short-and-medium between stationary phase, carry out thus arc crater and process.Thus, even the value of the welding current of electric arc being switched on because arc crater is processed diminishes and the temperature in molten bath reduces, also can be with filler wire by the direct melting of electric arc, therefore during arc crater in filler wire also can feeding, can shorten arc crater and process the needed time.Its result enhances productivity.
The explanation of symbol
Claims (2)
1. the arc crater control method of two welding wires welding, during this pair wire welding was connected during stabilization, between welding welding wire and mother metal, produce electric arc, and to being undertaken by the formed molten bath feeding of this electric arc filler wire, the arc crater control method of described pair of welding wire welding is characterised in that
During the arc crater, under the state of the feeding of the generation that continues above-mentioned electric arc and above-mentioned filler wire, make distance between weldingwires between above-mentioned welding welding wire and the above-mentioned filler wire from than short-and-medium during the aforementioned stable, carry out thus arc crater and process.
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 the above-mentioned arc crater than aforementioned stable during in feed speed slow, the feed speed of the above-mentioned filler wire in making during the above-mentioned arc crater than aforementioned stable during in feed speed slow, the feed speed of the above-mentioned filler wire in making during the above-mentioned arc crater than above-mentioned arc crater during in the feed speed of above-mentioned welding welding wire slow.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011-215804 | 2011-09-30 | ||
| JP2011215804A JP5863365B2 (en) | 2011-09-30 | 2011-09-30 | Two-wire welding crater control method |
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| CN103028812B CN103028812B (en) | 2016-05-11 |
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| CN (1) | CN103028812B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109175610A (en) * | 2018-10-11 | 2019-01-11 | 南京钢铁股份有限公司 | A kind of welding of gas shielded welding of thin plate welding method peculiar to vessel |
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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 |
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| JPH0698494B2 (en) * | 1990-02-21 | 1994-12-07 | 共同酸素株式会社 | Consumable electrode arc welding method |
| JP2003145270A (en) * | 2001-11-14 | 2003-05-20 | Daihen Corp | Method for terminating consumable two-electrode arc welding |
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| JP2002224833A (en) * | 2001-01-30 | 2002-08-13 | Daihen Corp | Method for arc welding with consumable electrodes, method for controlling welding robot, and welding robot |
| JP2002361413A (en) * | 2001-06-12 | 2002-12-18 | Daihen Corp | Method for completing consumable two-electrode arc welding, method for controlling completion of welding, and welding robot |
| 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 |
| CN101391337A (en) * | 2007-09-20 | 2009-03-25 | 株式会社大亨 | Welding starting method of double-wire welding |
| CN101422841A (en) * | 2007-10-31 | 2009-05-06 | 株式会社大亨 | Welding start method of double-wire welding |
| CN101422842A (en) * | 2007-10-31 | 2009-05-06 | 株式会社大亨 | Welding start method of double-wire welding |
| JP2009154173A (en) * | 2007-12-26 | 2009-07-16 | Daihen Corp | Ending control method of two-wire welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109175610A (en) * | 2018-10-11 | 2019-01-11 | 南京钢铁股份有限公司 | A kind of welding of gas shielded welding of thin plate welding method peculiar to vessel |
Also Published As
| Publication number | Publication date |
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| JP2013075303A (en) | 2013-04-25 |
| JP5863365B2 (en) | 2016-02-16 |
| CN103028812B (en) | 2016-05-11 |
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