CN102922088A - Double wire welding control method - Google Patents
Double wire welding control method Download PDFInfo
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- CN102922088A CN102922088A CN2012102728279A CN201210272827A CN102922088A CN 102922088 A CN102922088 A CN 102922088A CN 2012102728279 A CN2012102728279 A CN 2012102728279A CN 201210272827 A CN201210272827 A CN 201210272827A CN 102922088 A CN102922088 A CN 102922088A
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Abstract
The invention provides a double wire welding control method. In the double wire welding method, filler wires are fed into a consumable electrode arc for welding, deposit weld amount of the filler wires can be increased to improve welding efficiency. An electric arc is generated and a weld pool is formed between a consumable electrode and base material, the filler wires are inserted in to a latter part of the meld pool and welding is simultaneously carried out, lateral oscillations of the filler wires are carried out along a front and back direction of a welding direction, and displacement (Lh) of inserting positions of the filler wires can change in a sine wave shape. And feed speed (Fw) of the filler wires and displacement (Lh) change proportionally in the sine wave shape. Compared with lateral oscillation center position, if the inserting position of the filler wires are positioned in a front direction, fusion of the filler wires is improved, and feed speed (Fw) of the filler wires is highly speeded; and is the inserting position of the filler wires are positioned in a back direction, the weld pool is cooled, protrusions are suppressed, so forming of hump weld bead is prevented.
Description
Technical field
The present invention relates between consumable electrode and mother metal to produce electric arc and to form the molten bath double-wire welding control method that when filler wire being inserted into molten bath latter half of, welds.
Background technology
In the past known a kind of: as between consumable electrode (hereinafter referred to as the welding welding wire) and mother metal, to produce electric arc and form the molten bath, and filler wire is inserted into the Double-wire welding method (with reference to patent documentation 1) that welds in this molten bath.In this Double-wire welding method, owing to apply the motlten metal of filler wire to the motlten metal of welding welding wire, thereby increase the motlten metal amount, so can carry out high deposited and welding at a high speed.Especially, utilizing Double-wire welding method to carry out in the high-speed welding, in order to prevent becoming humping weld (humping bead), importantly make filler wire after consumable electrode electric arc, carry out feeding with molten bath short circuit ground.This be because, carry out melting in the consumable electrode electric arc if filler wire is fed to, then the molten bath is almost uncolled and owing to also can't utilize filler wire to constrain the latter half of protuberance in molten bath, so do not reach the effect that suppresses humping weld.Relative with it, if make the latter half of short circuit ground in the molten bath of filler wire and electric arc circumference carry out feeding, and utilize the heat in molten bath to carry out melting, then the molten bath is cooled and to utilize filler wire to suppress the molten bath latter half of, thereby can suppress the formation of humping weld.Thereby, in the Double-wire welding method of prior art, by with state and the molten bath short circuit of cooling, thereby cooling off the molten bath to filler wire no power electric current.
In Double-wire welding method; as the method that between welding welding wire and mother metal, produces electric arc, can use the various consumable electrode formula arc-welding process of CO2 welding connection, metal active gas arc welding connection (metal active gas welding), Metallic Inert Gas shielded arc welding connection (metal inert gas welding), pulse arc welding connection, alternating current arc welding etc.In addition, filler wire is welding wire front end and molten bath short circuit basically, is used to carry out melting from the heat in molten bath.Therefore, between filler wire and molten bath, do not produce electric arc.In the present invention, although explanation uses the pulse arc welding connection to be used as the situation of above-mentioned consumable electrode formula arc-welding process, also but other weldings.In addition, in the following description, use with the roughly the same meaning in mother metal and molten bath.
Fig. 6 is the current-voltage waveform figure that has used in the Double-wire welding method of pulse electric arc welding.Fig. 6 (A) expression changed the time of the welding current Iw that the welding welding wire is switched on, the time that Fig. 6 (B) is illustrated in the weldingvoltage Vw that applies between welding welding wire and the mother metal (molten bath) changes, and the time of the feed speed Fw of Fig. 6 (C) expression filler wire changes.Although the feed speed of welding welding wire is also not shown, carries out the constant speed feeding with setting.Between filler wire and molten bath, do not apply voltage, electrical current not yet.Filler wire as described above, with the molten bath short circuit state under carry out feeding.Even if filler wire and molten bath deviate from, owing to do not apply voltage yet, so between filler wire and molten bath, do not produce electric arc.Below, describe with reference to this figure.
Between the peak period of moment t1～t2 among the Tp, shown in Fig. 6 (A), certainly weld the switched on peak point current Ip of the large current value more than the critical value of welding wire in order to make the droplet transfer, shown in Fig. 6 (B), between welding welding wire and molten bath, applied and the proportional crest voltage Vp of arc length.
During moment t2～t3 basic among the Tb, shown in Fig. 6 (A), switched in order not form molten drop less than the fundamental current Ib of the little current value of critical value, shown in Fig. 6 (B), apply fundamental voltage Vb.To arrive till t1～t3 constantly during as 1 cycle (pulse period Tf), repeatedly weld.Above-mentioned peak point current Ip is 450～550A degree, and above-mentioned fundamental current Ib is 30～60A degree.Tp and constantly during t4～t5 basic among the Tb between the peak period of moment t3～t4 carries out and above-mentioned same action again.
On the other hand, shown in Fig. 6 (C), the feed speed Fw of filler wire is with the stable filler wire feed speed Fc of fixed value, with the molten bath short circuit state under carry out feeding.Stablize filler wire feed speed Fc, most applications is set at the scope of 10～30% degree of the feed speed of welding welding wire in order stably to carry out melting.
Yet, in order to carry out good pulse electric arc welding, importantly arc length is maintained appropriate value.For arc length is maintained appropriate value, need to carry out the output control (arc length control) of following this welder.Arc length has proportional relation roughly with the weldingvoltage mean value Vav that is shown in broken lines in Fig. 6 (B).For this reason, need to detect weldingvoltage mean value Vav, becoming with this detected value makes the output control of the welding current mean value Iav that the is shown in dotted line variation of Fig. 6 (A) with the mode of the weldingvoltage setting value that is equivalent to suitable arc length.Because be that arc length is longer than in the appropriate value in weldingvoltage mean value Vav sets value greater than weldingvoltage, so will reduce welding current mean value Iav to reduce welding wire melting speed, to shorten arc length.On the other hand, because weldingvoltage mean value Vav is less than being that arc length is shorter than in the appropriate value in the weldingvoltage setting value, so want increase of weld current mean value Iav to increase welding wire melting speed, lengthening arc length.As above-mentioned weldingvoltage mean value Vav, the value after normal operation makes weldingvoltage Vw by low pass filter (cut-off frequency is 1～10Hz degree).In addition, as the operational ton that welding current mean value Iav is changed, and make the operation of at least one variation of Tp between the peak period, pulse period Tf, peak point current Ip or fundamental current Ib.For example, pulse period Tf is being carried out in the FEEDBACK CONTROL as operational ton, Tp, peak point current Ip and fundamental current Ib are set to setting (being called the frequency modulation(PFM) control mode) between the peak period.In addition, (pulse width) Tp carries out in the FEEDBACK CONTROL as operational ton between with the peak period, and peak point current Ip, fundamental current Ib and pulse period Tf are set to setting (being called pulse width modulation control method).
The invention of patent documentation 2 is that the gas-shielded metal-arc welding with following characteristics connects method: in the gas-shielded metal-arc welding of zinc-based metal plated steel sheet connects; utilize a plurality of welding wires; only making in advance, welding wire produces electric arc and forms the molten bath; make rear row welding wire to be inserted in this molten bath with the mode of welding wire at a distance of the above distance of 2mm of going ahead of the rest; take vibration number as more than 0.5 time/second, amplitude makes it vibration and stirs as the condition more than the 0.3mm, and use the argon gas of the oxygen that contains not enough 7Vol% as protective gas.And the direction of vibration of rear row welding wire can be the sealing wire direction, can be and the direction of sealing wire quadrature, also can draw camber line.According to this inventive method, during the gas-shielded metal-arc welding that produces the zinc-based metal plated steel sheet of more gas in when welding connects, prevented the generation of hole groove and pore, can access solid weld metal.Namely, in the invention of patent documentation 2, in the Double-wire welding method that has used 2 welding welding wires, welding wire (consumable electrode) produces electric arc and forms the molten bath making in advance, rear row welding wire (filler wire) is not produced in the situation of electric arc, (teeter weaving) comes agitation molten pool in the vibration of sealing wire direction.
Patent documentation 1: TOHKEMY 2010-167489 communique
Patent documentation 2: Japanese kokai publication hei 6-39554 communique
Summary of the invention
In the Double-wire welding method of above-mentioned prior art, make filler wire with the molten bath short circuit state insert, filler wire is by the heat fusing in molten bath.For this reason, with by the heat in molten bath so that the mode of the speed of filler wire melting (melting speed) balance is set the feed speed of filler wire.Therefore, the maximum of the feed speed of filler wire adopts by the heat energy from the molten bath enough so that the value of filler wire melting.If the feed speed of filler wire is greater than this maximum, then filler wire has slag (the residual り of molten け), forms bad welding bead.On the other hand, in Double-wire welding method, in order further to improve high depositedization and high-speed welding, need further to increase the feed speed of filler wire.
Therefore, in the present invention, thereby its purpose is to provide a kind of and suppresses the formation that protuberance can suppress humping weld by the latter half of cooling that makes the molten bath, and can realize the high speed of the feed speed of filler wire, the double-wire welding control method of high depositedization with good molten condition.
In order to solve the problems of the technologies described above, the invention of technical scheme 1 is a kind of double-wire welding control method, produces electric arc and form the molten bath between consumable electrode and mother metal, filler wire is inserted into the latter half of of described molten bath and welds, it is characterized in that,
Make the insertion position of described filler wire carry out teeter at the fore-and-aft direction of welding direction, the feed speed of described filler wire and described teeter are synchronously changed.
The invention of technical scheme 2 is characterised in that in technical scheme 1 described double-wire welding control method,
Described insertion position compared with the center of described teeter and be moved to the front side in displacement be made as positive value, the described displacement that is moved in the rear direction is made as negative value, the feed speed of described filler wire and described displacement are changed pro rata.
The invention of technical scheme 3 is characterised in that in technical scheme 2 described double-wire welding control methods,
In the feed speed that makes described filler wire and described displacement change pro rata, is set the time delay of regulation between two signals.
The invention of technical scheme 4 is characterised in that in technical scheme 1 described double-wire welding control method,
Described insertion position is compared with the center of described teeter and be moved to the front side in the feed speed of described filler wire faster than the feed speed that is moved to the described filler wire in the rear direction.
The invention effect
According to the present invention, can make the insertion position of filler wire carry out teeter at the fore-and-aft direction of welding direction, the feed speed of filler wire and teeter are synchronously changed.Thus, the insertion position of filler wire be positioned at the front side in, impel the melting of filler wire, make the mean value high speed of the feed speed of filler wire, when being positioned at rear side, having cooled off the molten bath and suppressed protuberance and suppressed the formation of humping weld.Its result in the present invention, compared to prior art, can carry out high deposited welding and high-speed welding.
Description of drawings
Fig. 1 is the synoptic diagram of the weld part of the double-wire welding control method that relates to of expression embodiments of the present invention.
Fig. 2 is the oscillogram of the 1st pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.
Fig. 3 is the oscillogram of the 2nd pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.
Fig. 4 is the oscillogram of the 3rd pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.
Fig. 5 is the block diagram of the welder of the double-wire welding control method that relates to for the embodiment that is implemented in the invention described above that Fig. 1～Fig. 4 narrates.
Fig. 6 is the current-voltage waveform figure that has used in the prior art in the Double-wire welding method of pulse electric arc welding.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the synoptic diagram of the weld part of the double-wire welding control method that relates to of expression embodiments of the present invention.Fig. 1 is the figure that watches from the side weld part, welds like that as shown by arrows left direction and advances.Below, describe with reference to Fig. 1.
By welding torch 4 feedings welding welding wire 1, between the front end that welds welding wire and mother metal 2, produce electric arc 3.Here, be that welding welding wire 1 vertically is fed to mother metal 2 in 0 ° the situation at the advancing angle of welding torch 4.Since this electric arc 3, and formed molten bath 2a at mother metal 2.With a chain-dotted line center line of the direction of feed that represents to weld welding wire 1 is shown, the points that intersect on this center line and mother metal 2 surfaces are welding target position a.
To be displacement Lh (mm) because of the insertion position of the filler wire 6 of teeter displacement and the distance definition that inserts between the b0 of reference position (teeter center).About the symbol of this displacement Lh, will be positioned at the place ahead of inserting reference position b0 and be made as positive value, will be positioned at the rear and be made as negative value.By such definition, then have: position, forefront b1 is Lh=Sw/2, and inserting reference position (teeter center) b0 is Lh=0, and last location b2 is Lh=-Sw/2.Here, displacement Lh is as shown in the formula changing with sinusoidal wave shape like that.
Lh=(Sw/2) sin (2 π ft) ... (1) formula
Wherein, t is elapsed time (second).
And the feed speed Fw of filler wire 6 and this displacement Lh synchronously change.Below, with reference to Fig. 2～Fig. 4, the change pattern of the feed speed Fw of filler wire 6 is described.
Fig. 2 is the oscillogram of the 1st pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.Fig. 2 (A) expression changed the time of the welding current Iw that the welding welding wire is switched on, the time that Fig. 2 (B) is illustrated in the weldingvoltage Vw that applies between welding welding wire and the mother metal (molten bath) changes, the time of the displacement Lh of the insertion position of Fig. 2 (C) expression filler wire changes, and the time of the feed speed Fw of Fig. 2 (D) expression filler wire changes.Although the feed speed of welding welding wire is also not shown, carries out the constant speed feeding with setting.Between filler wire and molten bath, do not apply voltage, electrical current not yet.Fig. 2 is than above-mentioned Fig. 6 and oscillogram in the long situation more than 10 times of time shaft (transverse axis).Therefore, the welding current Iw shown in Fig. 2 (A) was the impulse waveform same with Fig. 6 originally, but because show its mean value, so roughly linearly.Similarly, the weldingvoltage Vw shown in Fig. 2 (B) also was impulse waveform originally, but because show mean value, so roughly linearly.Below, describe with reference to Fig. 2.
Shown in Fig. 2 (A), to welding welding wire energising welding current Iw, shown in Fig. 2 (B), between welding welding wire and mother metal, apply weldingvoltage Vw, and produce electric arc.Shown in Fig. 2 (C), displacement Lh changes with sinusoidal wave shape as above-mentioned (1) formula illustrates.Therefore, at moment t0, t=0 second, Lh=0.At moment t1, t=1/ (4f), displacement Lh=Sw/2.At moment t2, t=1/ (2f), displacement Lh=0.At moment t3, t=3/ (4f), displacement Lh=-Sw/2.At moment t4, t=1/f, displacement Lh=0.Later on so repeatedly.For example, if establish f=10Hz, then constantly t1=25ms, constantly t2=50ms, constantly t3=75ms, constantly t4=100ms.
Shown in Fig. 2 (D), the feed speed Fw of filler wire and displacement Lh pro rata, as shown in the formula changing with sinusoidal wave shape like that.
Fw=(Sf/2) sin (2 π ft)+Fwc... (2) formula
Wherein, Sf (cm/min) is the feed speed amplitude, and f (Hz) is the teeter frequency, and t (second) is the elapsed time, and Fwc (cm/min) is amplitude center feed speed.
At moment t0, t=0 second, the feed speed Fw=Fwc of filler wire.At moment t1, t=1/ (4f), the feed speed Fw=of filler wire (Sf/2)+Fwc.At moment t2, t=1/ (2f), the feed speed Fw=Fwc of filler wire.At moment t3, t=3/ (4f), the feed speed Fw=of filler wire (Sf/2)+Fwc.At moment t4, t=1/f, the feed speed Fw=Fwc of filler wire.Later on so repeatedly.
Such as Fig. 2 (C) and (D), the displacement Lh of the variation of the feed speed Fw of filler wire and the insertion position of filler wire is proportional.Wherein, feed speed Fwc in amplitude center can be set as than the larger value of above-mentioned of the prior art stable filler wire feed speed Fc in Fig. 6 narration.Because amplitude center feed speed Fwc is the mean value of feed speed, so present embodiment compared to prior art, can set the feed speed of filler wire larger.It is the reasons are as follows.During moment t0～t2, because displacement Lh 〉=0, the insertion position of filler wire enters into the inside of electric arc generating unit or near the electric arc generating unit, becomes large so bring the heat input of filler wire, and it is large that melting speed becomes.Therefore, in this period, also can melting even if increase the feed speed of filler wire.During moment t2～t4, because displacement Lh＜0, the insertion position of filler wire is away from the electric arc generating unit, so the melting speed of filler wire diminishes, thereby the feed speed of filler wire also diminishes pro rata.And filler wire is subject to from the heat in molten bath and melting.Thereby, as described above, play the effect of cooling molten bath and compacting protuberance, so can suppress the formation of humping weld.Namely, be positioned at the front side in (Lh 〉=0) in the insertion position, promote the melting of filler wire, make the mean value high speed of the feed speed of filler wire; Be positioned in the rear direction (Lh＜0), cooling molten bath and compacting protuberance are so suppressed the formation of humping weld.Its result in the present embodiment, compared to prior art, can carry out high deposited welding and high-speed welding.In addition and since be positioned at the front side in promote melting to get final product, so need not to make filler wire to be in state with the molten bath short circuit.By comparison, be positioned in the inside that electric arc produces in the insertion position of filler wire, for making stably melting, preferably be in non-short-circuit condition.On the other hand, be positioned in the rear direction in the insertion position of filler wire, in order to be subject to heat and the compacting protuberance from the molten bath, being in that short-circuit condition becomes must condition.
Fig. 3 is the oscillogram of the 2nd pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.Fig. 3 (A) expression changed the time of the welding current Iw that the welding welding wire is switched on, the time that Fig. 3 (B) is illustrated in the weldingvoltage Vw that applies between welding welding wire and the mother metal (molten bath) changes, the time of the displacement Lh of the insertion position of Fig. 3 (C) expression filler wire changes, and the time of the feed speed Fw of Fig. 3 (D) expression filler wire changes.It is corresponding that Fig. 3 and above-mentioned Fig. 2 carry out, all identical except the feed speed Fw of the filler wire shown in Fig. 2 (D), so omit these explanations.Below, with reference to Fig. 3, the change pattern of the feed speed Fw of filler wire is described.
Shown in Fig. 3 (D), the feed speed Fw of filler wire is corresponding to the variation of the displacement Lh of the insertion position of the filler wire shown in this Fig. 3 (C), as shown in the formula changing with sinusoidal wave shape like that.
Fw=(Sf/2) sin (2 π ft-α)+Fwc... (3) formula
Wherein, α (second) is the time delay of predesignating.Namely, the feed speed Fw of filler wire is for having postponed the sine wave of α time delay than displacement Lh.Be set to the degree of 0＜α≤(1/8f).In the situation of f=10Hz, the higher limit of α is 1/810=12.5ms.The waveform of Fig. 3 (D) is the situation of α=(1/8f).Therefore, shown in Fig. 3 (D), at the centre of moment t0 with moment t1, t=(1/8f) second, the feed speed Fw=Fwc of filler wire.At the centre of moment t1 with moment t2, t=(3/8f), the feed speed Fw=of filler wire (Sf/2)+Fwc.At the centre of moment t2 with moment t3, t=(5/8f), the feed speed Fw=Fwc of filler wire.In the centre of moment t3 with moment t4, t=(7/8f), the feed speed Fw=of filler wire (Sf/2)+Fwc.From moment t4 through the moment after (1/8f), t=(9/8f), the feed speed Fw=Fwc of filler wire.So repeat later on.
Such as Fig. 3 (C) and (D), the displacement Lh of the variation of the feed speed Fw of filler wire and the insertion position of filler wire synchronously changes, and for having postponed the waveform of α time delay.The effect that synchronizes them is identical with Fig. 2.And, by making it delay, can further increase amplitude center feed speed Fwc, can make the mean value high speed of the feed speed of filler wire.Thus, can further improve high depositedization and high-speed welding.Its reason is, till being subject to heat from electric arc and molten bath and playing the melting that helps filler wire from filler wire, and free the delay.Therefore, if having the α and the feed speed of filler wire is changed time delay that is equivalent to this time delay, then can improve melting efficiency, can make the feed speed high speed of filler wire.Therefore, time delay, A was set to the time delay that is equivalent between heat input and the melting, was set to by experiment appropriate value according to the feed speed of welding welding wire, diameter, material, speed of welding etc.
Fig. 4 is the oscillogram of the 3rd pattern of the double-wire welding control method that relates to of expression embodiments of the present invention.Fig. 4 (A) expression changed the time of the welding current Iw that the welding welding wire is switched on, the time that Fig. 4 (B) is illustrated in the weldingvoltage Vw that applies between welding welding wire and the mother metal (molten bath) changes, the time of the displacement Lh of the insertion position of Fig. 4 (C) expression filler wire changes, and the time of the feed speed Fw of Fig. 4 (D) expression filler wire changes.It is corresponding that Fig. 4 and above-mentioned Fig. 2 carry out, all identical except the feed speed Fw of the filler wire shown in Fig. 4 (D), so omit these explanations.Below, with reference to Fig. 4, the change pattern of the feed speed Fw of filler wire is described.
Shown in Fig. 4 (D), the feed speed Fw of filler wire is corresponding to the variation of the displacement Lh of the insertion position of the filler wire shown in Fig. 4 (C), as shown in the formula changing so that rectangle is wavy like that.
In Lh 〉=0 o'clock, Fw=(Sf/2)+Fwc ... (41) formula
In Lh＜0 o'clock, and Fw=(Sf/2)+Fwc ... (42) formula
Namely, because teeter and so that the insertion position of filler wire is positioned at the front side in (Lh 〉=0), near electric arc, the heat input becomes large, so increase the feed speed Fw of filler wire.On the other hand, be positioned in the rear direction (Lh＜0) in the insertion position of filler wire, away from electric arc, the heat input diminishes, so reduce the feed speed Fw of filler wire.Shown in Fig. 4 (D), during moment t0～t2 in, so displacement Lh 〉=0 is the feed speed Fw=of filler wire (Sf/2)+Fwc.During moment t2～t4, displacement Lh＜0, thus the feed speed Fw=of filler wire (Sf/2)+Fwc.Repeatedly carry out later on.
Such as Fig. 4 (C) and (D), the variation of the displacement Lh of the feed speed Fw of filler wire and the insertion position of filler wire synchronously changes so that rectangle is wavy.The effect of this moment is identical with Fig. 2.But, because the feed speed Fw of filler wire is changed so that rectangle is wavy, so when changing with sinusoidal wave shape as shown in Figure 2, simplified the feeding control circuit of filler wire.
In above-mentioned Fig. 2～Fig. 4, the situation that the displacement Lh of the insertion position of the filler wire that is caused by teeter changes with sinusoidal wave shape has been described.But this displacement Lh also can triangular wave, trapezoidal wave, rectangle is wavy changes.Correspondingly, the feed speed Fw of filler wire also can triangular wave, trapezoidal wavy the variation.
Fig. 5 is the block diagram of the welder of the double-wire welding control method that relates to for the embodiment that is implemented in the invention described above that Fig. 1～Fig. 4 narrates.Fig. 5 is that consumable electrode arc welding is the situation of above-mentioned pulse electric arc welding.Below, with reference to Fig. 5, each piece is described.
Electric power main circuit PM as input, according to driving signal Dv described later, utilizes inverter control to export control the source power supply (omitting diagram) of 3 phase 200V etc., exports weldingvoltage Vw and welding current Iw for generation of electric arc 3.Although this electric power main circuit PM has omitted diagram, is made of following parts: to source power supply carry out rectification No. 1 rectification circuit, make the direct current smoothing after being rectified capacitor, according to above-mentioned driving signal Dv with the DC converting after smoothed become high-frequency ac inverter circuit, high-frequency ac is depressurized to for generation of the high frequency transformer of the required appropriate voltage value of electric arc 3, to No. 2 rectification circuits that carried out rectification by the high frequency electric after the step-down and the reactor that the direct current after being rectified is carried out smoothing.
Welding welding wire 1 by the rotation of the welding welding wire feeding roller 5 after welding welding wire feeding motor WM is combined in welding torch 4 interior feedings, from above-mentioned electric power main circuit PM, power via power supply chip (omit diagram), and and mother metal 2 between produce electric arc 3.Filler wire 6 is fed in filler wire guide rod 7 by the rotation of the filler wire feed rolls 8 after filler wire feeding motor FM is combined, and is inserted into the molten bath that is formed by electric arc 3.Teeter signal generating circuit WS output becomes sinusoidal wave teeter signal Ws.Wherein, Ws=sin (2 π ft), f is the teeter frequency of predesignating, t is the elapsed time.Teeter driving mechanism 9 is the mechanisms that comprise following motor: this teeter signal Ws as input, is used for making filler wire 6 carry out teeter at the fore-and-aft direction of welding direction.As this mechanism, used in the past and utilize the slider crank mechanism that rotatablely moving of motor is transformed into straight-line mechanism, utilizes crank and jack back rotatablely moving of motor to be transformed into the mechanism etc. of swing movement.Utilize this teeter driving mechanism 9, so that the displacement Lh formula described above (1) of the insertion position of filler wire 6 changes like that.Come set amplitude Sw by this teeter driving mechanism 9.
Voltage detecting circuit VD detects above-mentioned weldingvoltage Vw, and voltage sense signal Vd.Voltage smoothing circuit VAV averages (being the low pass filter of 1～10Hz degree by cut-off frequency) with this voltage detection signal Vd as input, and output weldingvoltage average value signal Vav.Voltage setting circuit VR exports predetermined weldingvoltage setting signal Vr.Voltage error amplifying circuit EV amplifies the error between this weldingvoltage setting signal Vr and the above-mentioned weldingvoltage average value signal Vav, and output voltage error amplifying signal Ev.
Voltage/frequency translation circuit VF is transformed into signal with the proportional frequency of value of above-mentioned voltage error amplifying signal Ev with it, becomes the pulse-period signal Tf of high level by each frequency (pulse period) output short time.Carry out above-mentioned frequency modulation(PFM) control by this voltage/frequency translation circuit VF.Initialization circuit TPR exports setting signal Tpr between the predetermined peak period between the peak period.Between the peak period timer circuit TP with setting signal Tpr between above-mentioned pulse-period signal Tf and above-mentioned peak period as input, output from the time that pulse-period signal Tf is changed to high level light that setting signal Tpr determines between by the peak period during in become signal Tp between peak period of high level.Therefore, signal Tp is that the cycle is the pulse period between this peak period, and becomes high level between the peak period, becomes low level signal in during basic.
Peak point current initialization circuit IPR exports predetermined peak point current setting signal Ipr.Fundamental current initialization circuit IBR exports predetermined fundamental current setting signal Ibr.Current Control initialization circuit ICR with signal Tp between the above-mentioned peak period, above-mentioned peak point current setting signal Ipr and above-mentioned fundamental current setting signal Ibr as input, be peak point current setting signal Ipr to be exported as Current Control setting signal Icr in the high level (between the peak period) at signal Tp between the peak period, in low level (during basic), fundamental current setting signal Ibr exported as Current Control setting signal Icr.Current detection circuit ID detects above-mentioned welding current Iw, and output electric current measure signal Id.Current error amplifying circuit EI amplifies the error between above-mentioned Current Control setting signal Icr and the above-mentioned current detection signal Id, and output current error amplification signal Ei.Drive circuit DV as input, carries out PWM modulation control based on this signal with this current error amplifying signal Ei, is used for driving the driving signal Dv of the inverter circuit in the above-mentioned electric power main circuit PM based on its result's output.
Welding welding wire feeding Speed Setting circuit WR exports predetermined welding welding wire feeding rate setting signal Wr.Welding welding wire feeding control circuit WC will export above-mentioned welding welding wire feeding motor WM to for the welding welding wire feeding control signal Wc that comes feeding welding welding wire 1 with the feed speed suitable with the value of this welding welding wire feeding rate setting signal Wr.Amplitude center feed speed initialization circuit FWCR exports predetermined amplitude center feed speed setting signal Fwcr.Feed speed amplitude setting circuit SFR exports predetermined feed speed amplitude setting signal Sfr.As input, output is changed to the wavy filler wire feed speed setting signal Fr of restriction based on above-mentioned (2) formula to filler wire feed speed initialization circuit FR with above-mentioned amplitude center feed speed setting signal Fwcr and this feed speed amplitude setting signal Sfr.Because the elapsed time t that generates in the above-mentioned teeter signal Ws is identical value with elapsed time t in generating this filler wire feed speed setting signal Fr, so these two signals are synchronous.As mentioned above, also can replace (2) formula and use (3) formula.And, also (2) formula be can replace and (41) formula and (42) formula used.Filler wire feeding control circuit FCT will be for coming the filler wire feeding control signal Fct of feeding filler wire 6 to export above-mentioned filler wire feeding motor FM to the suitable feed speed of value of this filler wire feed speed setting signal Fr.
According to above-mentioned embodiment, can make the insertion position of filler wire carry out teeter at the fore-and-aft direction of welding direction, the feed speed of filler wire and teeter are synchronously changed.Thus, the insertion position of filler wire be positioned at the front side in, impel the melting of filler wire, make the mean value high speed of the feed speed of filler wire, when being positioned at rear side, having cooled off the molten bath and suppressed protuberance and suppressed the formation of humping weld.Its result in the present embodiment, compared to prior art, can carry out high deposited welding and high-speed welding.
Symbol description:
1 welding welding wire
2 mother metals
The 2a molten bath
3 electric arcs
4 welding torches
5 welding welding wire feeding rollers
6 filler wires
7 filler wire guide rods
8 filler wire feed rolls
9 teeter driving mechanisms
A welding target position
B0 inserts reference position (teeter center)
Position, b1 forefront
The last location of b2
The DV drive circuit
Dv drives signal
EI current error amplifying circuit
Ei current error amplifying signal
EV voltage error amplifying circuit
Ev voltage error amplifying signal
F teeter frequency
Fc stablizes the filler wire feed speed
FCT filler wire feeding control circuit
Fct filler wire feeding control signal
FM filler wire feeding motor
FR filler wire feed speed initialization circuit
Fr filler wire feed speed setting signal
The feed speed of Fw filler wire
Fwc amplitude center feed speed
FWCR amplitude center feed speed initialization circuit
Fwcr amplitude center feed speed setting signal
Iav welding current mean value
The Ib fundamental current
IBR fundamental current initialization circuit
Ibr fundamental current setting signal
ICR Current Control initialization circuit
Icr Current Control setting signal
The ID current detection circuit
The Id current detection signal
The Ip peak point current
IPR peak point current initialization circuit
Ipr peak point current setting signal
The Iw welding current
The displacement of the insertion position of Lh filler wire
The Lw distance between weldingwires from
The PM electric power main circuit
SFR feed speed amplitude setting circuit
Sfr feed speed amplitude setting signal
The Sw amplitude
The t elapsed time
During Tb is basic
The Tf pulse period (signal)
TP timer circuit between the peak period
Tp is (signal) between the peak period
TPR initialization circuit between the peak period
Tpr setting signal between the peak period
The VAV voltage smoothing circuit
Vav weldingvoltage mean value (signal)
The Vb fundamental voltage
The VD voltage detecting circuit
The Vd voltage detection signal
VF voltage/frequency translation circuit
The Vp crest voltage
The VR voltage setting circuit
Vr weldingvoltage setting signal
The Vw weldingvoltage
WC welding welding wire feeding control circuit
Wc welding welding wire feeding control signal
WM welding welding wire feeding motor
WR welding welding wire feeding Speed Setting circuit
Wr welding welding wire feeding rate setting signal
WS teeter signal generating circuit
Ws teeter signal
A time delay
Claims (4)
1. double-wire welding control method produces electric arc and forms the molten bath between consumable electrode and mother metal, filler wire is inserted into the latter half of of described molten bath and welds, and this double-wire welding control method is characterised in that,
Make the insertion position of described filler wire carry out teeter at the fore-and-aft direction of welding direction, the feed speed of described filler wire and described teeter are synchronously changed.
2. double-wire welding control method according to claim 1 is characterized in that,
Described insertion position compared with the center of described teeter and be moved to the front side to the time displacement be made as positive value, described displacement when being moved to rear direction is made as negative value, and the feed speed of described filler wire and described displacement are changed pro rata.
3. double-wire welding control method according to claim 2 is characterized in that,
In the feed speed that makes described filler wire and described displacement change pro rata, is set the time delay of regulation between two signals.
4. double-wire welding control method according to claim 1 is characterized in that,
Described insertion position is compared with the center of described teeter and be moved to the front side to the time the feed speed of the described filler wire of feed speed when being moved to rear direction of described filler wire fast.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-172840 | 2011-08-08 | ||
| JP2011172840A JP5785812B2 (en) | 2011-08-08 | 2011-08-08 | 2-wire welding control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102922088A true CN102922088A (en) | 2013-02-13 |
| CN102922088B CN102922088B (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210272827.9A Active CN102922088B (en) | 2011-08-08 | 2012-08-02 | Double-wire welding control method |
Country Status (2)
| Country | Link |
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| JP (1) | JP5785812B2 (en) |
| CN (1) | CN102922088B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104227181A (en) * | 2013-06-24 | 2014-12-24 | 北京工业大学 | Double-wire-feeding welding method implemented by main electric arcs driven by auxiliary electric arcs to swing |
| CN112496505A (en) * | 2020-10-23 | 2021-03-16 | 上海船舶工艺研究所(中国船舶工业集团公司第十一研究所) | Double-wire gas shielded welding method for high-strength steel medium plate for ship |
| CN112570852A (en) * | 2019-09-27 | 2021-03-30 | 林肯环球股份有限公司 | Dual wire welding or additive manufacturing system and method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140263234A1 (en) * | 2013-03-15 | 2014-09-18 | Lincoln Global, Inc. | Tandem hot-wire systems |
| CN105817737B (en) * | 2016-04-11 | 2019-03-19 | 中国第一重型机械集团大连加氢反应器制造有限公司 | Electrode TIG bead-welding technology |
| JP2020069521A (en) * | 2018-11-01 | 2020-05-07 | 株式会社Ihi | Welding device and welding method |
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Also Published As
| Publication number | Publication date |
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| JP2013035020A (en) | 2013-02-21 |
| CN102922088B (en) | 2016-06-29 |
| JP5785812B2 (en) | 2015-09-30 |
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