CN104289790B - Double welding wire welding control methods - Google Patents
Double welding wire welding control methods Download PDFInfo
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- CN104289790B CN104289790B CN201410327768.XA CN201410327768A CN104289790B CN 104289790 B CN104289790 B CN 104289790B CN 201410327768 A CN201410327768 A CN 201410327768A CN 104289790 B CN104289790 B CN 104289790B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/124—Circuits or methods for feeding welding wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/095—Monitoring or automatic control of welding parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
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- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Abstract
The present invention provides a kind of double welding wire welding control methods.Suppress filler wire (6) in the welding of double welding wires and the situation of non-shorting state is in mother metal (2) because feeding is changed.Electric arc (3) is produced between consumable electrode (1) and mother metal (2) to form molten bath (2), in double welding wire welding control methods that filler wire (6) into short-circuit condition feeds to weld with molten bath (2), differentiate that filler wire (6) and molten bath (2) is in non-shorting state in welding, when the non-shorting state continue for more than the 1st a reference value (Tt1) (during moment t4~t5), the feed speed (Fw) of filler wire (6) is set to accelerate to acceleration filler wire feed speed (Fh) from filler wire feed speed (Fc) is stablized.Thus, even if filler wire (6) is changed into non-shorting state because of feeding variation, short-circuit condition also can promptly be reverted to.
Description
Technical field
The present invention relates to producing electric arc between consumable electrode and mother metal to form molten bath, and filler wire and molten bath are into short
The double welding wire welding control methods for feeding to weld line state.
Background technology
Known one kind produced electric arc to form molten bath in consumable electrode (hereinafter referred to as welding welding wire) between mother metal in the past,
And the double welding wire welding methods for into short-circuit condition feeding filler wire with the molten bath to weld (with reference to patent document 1).
In this pair of welding wire welding method, due to adding the molten metal of filler wire in the molten metal of welding welding wire, melt
Melt amount of metal increase, at a high speed and efficient be welded into possibility.Especially, carried out at a high speed when by double welding wire welding methods
During welding, in order to prevent as uneven welding bead, make filler wire from the rear of consumable electrode electric arc and molten bath short circuit into
To it is particularly important that.If the reason is that filler wire is fed into consumable electrode electric arc to melt, molten bath is hardly cold
But, and also the latter half of protrusion in molten bath can not be pressed by filler wire, therefore without the effect for suppressing uneven welding bead.
In contrast, if making the rear portion short circuit in filler wire and the molten bath of electric arc peripheral part to feed, melted because of the heat in molten bath, then
Molten bath is cooled, and can push down by filler wire that molten bath is latter half of, so as to suppress the formation of uneven welding bead.Cause
This, in double welding wire welding methods of the prior art, no power make filler wire overheat as electric current and in the state of cool
It is short-circuit with molten bath, so as to cool down molten bath.
In double welding wire welding methods, as the method that electric arc is produced between welding welding wire and mother metal, two can be used
Carbon oxide gas arc-welding process, MAG (protection of consumable electrode active gases) welding, MIG (consumable electrode noble gas protective) welderings
The various consumable electrode formula arc-welding process such as connection, pulse arc welding connection, alternating current arc welding.In addition, filler wire base
It is welding wire front end and molten bath short circuit on this, is melted because of the heat from molten bath.Therefore, will not be produced between filler wire and molten bath
Raw electric arc.In the present invention, although explanation uses feelings of the pulse arc welding connection as above-mentioned consumable electrode formula arc-welding process
Condition, but can also be other weldings.In addition, in the following description, mother metal and molten is used with the roughly the same meaning
Pond.
Fig. 7 is the current-voltage waveform figure in the double welding wire welding methods for used pulse electric arc welding.Figure (A) table
Show the time change for the welding current Iw being powered to welding welding wire, which represents in welding welding wire and mother metal (molten bath)
Between the time change of weldingvoltage Vw that applies, which represents the feed speed Fw of filler wire.Weld the feeding of welding wire
Speed is although it is not shown, still with setting and by constant speed feed.The no applied voltage between filler wire and molten bath, it is also obstructed
Electric current.Filler wire is fed with state with molten bath short circuit as described above.Even if because filler wire away from molten bath not yet
Apply voltage, so electric arc will not be produced between filler wire and molten bath.Hereinafter, illustrated with reference to the figure.
In Tp during the peak value of moment t1~t2, as shown in the figure (A), to make molten drop from welding welding wire transition, and lead to
The peak point current Ip of high current value more than electric critical value, as shown in the figure (B), applies and electricity between welding welding wire and molten bath
The proportional crest voltage Vp of arc length.
In Tb during the base value of moment t2~t3, as shown in the figure (A), to make not formed molten drop, and energization deficiency is faced
The reference current Ib of the low current value of dividing value, as shown in the figure (B), applies reference voltage V b.Will be untill moment t1~t3
During repeat to weld as 1 cycle (pulse period Tf).Tp and moment t4~t5 during the peak value of moment t3~t4
Tb repeats action same as described above again during base value.
On the other hand, as shown in the figure (C), the feed speed Fw of filler wire is fed with the stabilization filler wire of steady state value
The state of speed Fc and molten bath short circuit is fed.In order to stably melt, stablize filler wire feed speed Fc most cases quilts
It is set in the range of 10~30% degree of the feed speed of welding welding wire.
However, in order to carry out good pulse electric arc welding, electric arc is grown into it is particularly important that maintaining adequate value.In order to by electricity
Arc length maintains adequate value, carries out the output control (electric welding arc control) of following such source of welding current.Electric arc length exist with
Weldingvoltage average value Vav shown in figure (B) the middle dotted line is substantially in the relation of ratio.For this reason, detection weldingvoltage is averaged
Value Vav, into exercise the figure (A) dotted line shown in welding current average value Iav change so that the detected value be equal to it is proper
When electric arc grows output control as suitable weldingvoltage setting value.Because weldingvoltage average value Vav is more than weldingvoltage
When being that electric arc length is longer than adequate value when setting value, so reducing welding current average value Iav to reduce welding wire melting speed
Degree so that electric arc length shortens.On the contrary, because when weldingvoltage average value Vav is less than weldingvoltage setting value it is electric arc length
When shorter than adequate value, so increase of weld current average value Iav melts speed to increase welding wire so that electric arc length is elongated.
As above-mentioned weldingvoltage average value Vav, general use by weldingvoltage Vw by low-pass filter (cutoff frequency 1~
10Hz degree) after value.In addition, as the changed operating quantity of welding current average value Iav is made, between the enforcement peak period
At least one changed action of Tp, pulse period Tf, peak point current Ip or reference current Ib.For example, by pulse
Cycle T f as operating quantity to carry out feedback control when, Tp, peak point current Ip and reference current Ib are set to during peak value
Setting (is referred to as frequency modulation(PFM) control mode).In addition, carrying out using (pulse width) Tp during peak value as operating quantity
During feedback control, peak point current Ip, reference current Ib and pulse period Tf are set to setting and (are referred to as pulse width tune
Control mode processed).
In the TIG filling welding shown in patent document 2, it is (non-short to apply small voltage between filler wire and mother metal
Detect voltage in road), between filler wire and mother metal no power electric current, thus differentiates that filler wire is used up, to send alarm.
That is, if applying the non-shorting detection voltage for several V for not producing electric arc between filler wire and mother metal, in filler wire and
Electrical current when mother metal is in short-circuit condition, no power electric current when in away from state (non-shorting state).Pass through the electric current
Energization, to differentiate that filler wire is to be in non-shorting state in short-circuit condition.Moreover, it is being judged as in non-shorting
During state, the surplus of filler wire is changed into 0, differentiates and is used up as filler wire.
, also can be as although differentiating short-circuit condition or non-shorting state by the energization of electric current in above-mentioned
Differentiated like that by magnitude of voltage down.If that is, apply between filler wire and mother metal do not produce electric arc several V (such as
Non-shorting detection voltage 5V), then when filler wire and mother metal are in short-circuit condition, the voltage between filler wire and mother metal
(filler wire voltage) is changed into 0V, is changed into 5V when in non-shorting state.Therefore, it is possible to the value according to the filler wire voltage
To differentiate short-circuit condition or non-shorting state.
In addition, the current value being powered when above-mentioned filler wire and mother metal are in short-circuit condition be set at 0.05~
To overheat filler wire in the range of 1.0A degree.Thus one, the above-mentioned uneven welding bead of suppression will not be reduced
Effect.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2012-170958 publications
Patent document 2：Japanese Unexamined Patent Publication 5-305441 publications
The content of the invention
It is internal constantly in the feed path (guider) of filler wire if welding is repeated in a period of long-time
The residue that accumulation filler wire is cut, the variation of feeding constantly become larger.As a result, filler wire is constantly produced in welding
Non-shorting state.In the case where the non-shorting state is shorter than during fixing, the influence to welding bead less occurs.But such as
The fruit non-shorting state is more than during fixing, then welding bead can deteriorate.
Thus, in the present invention, even if being produced its purpose is to provide a kind of variation due to the feeding of filler wire
Raw non-shorting state, can also suppress double welding wire welding control methods of welding bead variation.
Means for solving the problems
In order to solve above-mentioned problem, the invention of technical solution 1 is a kind of double welding wire welding control methods, its feature exists
In between consumable electrode and mother metal producing electric arc forms molten bath, and short-circuit condition is according to filler wire and above-mentioned molten bath
Mode feed filler wire to weld, this pair of welding wire welding control method is characterized in that, is differentiated in above-mentioned welding above-mentioned
Filler wire and above-mentioned molten bath become non-shorting state, when the non-shorting state continue for more than the 1st predetermined a reference value,
The feed speed of above-mentioned filler wire is set to accelerate to predetermined acceleration filler wire from predetermined stabilization filler wire feed speed
Feed speed.
The invention of technical solution 2 is double welding wire welding control methods described in technical solution 1, it is characterised in that by
Apply non-shorting differentiation voltage between above-mentioned filler wire and above-mentioned molten bath, to carry out between above-mentioned filler wire and above-mentioned molten bath
Differentiation in above-mentioned short-circuit condition or above-mentioned non-shorting state.
The invention of technical solution 3 is double welding wire welding control methods described in technical solution 1 or 2, it is characterised in that above-mentioned
The side for accelerating filler wire feed speed to become larger according to the value of the acceleration filler wire feed speed with the passage of time
Formula changes.
Double welding wire welding control methods of the invention of technical solution 4 any one of technical solution 1~3, its feature
It is, when determining, the above-mentioned non-shorting state between above-mentioned filler wire and above-mentioned molten bath more than above-mentioned 1st a reference value is extensive
When again into above-mentioned short-circuit condition, the feed speed of above-mentioned filler wire is restored to aforementioned stable filler wire feed speed.
A kind of double welding wire welding control methods of the invention of technical solution 5 any one of technical solution 1~3, its
It is characterized in that, when determining the above-mentioned non-shorting shape between above-mentioned filler wire and above-mentioned molten bath more than above-mentioned 1st a reference value
When state reverts to above-mentioned short-circuit condition, the feed speed of above-mentioned filler wire is maintained above-mentioned acceleration filler wire and feeds speed
Degree, untill above-mentioned welding terminates.
Double welding wire welding control methods of the invention of technical solution 6 any one of technical solution 1~5, its feature
It is, when the duration of above-mentioned non-shorting state reaching value predetermined 2 a reference value bigger than above-mentioned 1st a reference value, stops
Only above-mentioned welding.
Invention effect
In accordance with the invention it is possible to non-shorting state is set promptly to revert to short-circuit condition.Thus, in the present invention, even if
Non-shorting state is produced due to the variation of the feeding of filler wire, can also suppress welding bead variation.
Brief description of the drawings
Fig. 1 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 1
Figure.
Fig. 2 is the welder for implementing double welding wire welding control methods involved by embodiments of the present invention 1
Block diagram.
Fig. 3 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 2
Figure.
Fig. 4 is the welder for implementing double welding wire welding control methods involved by embodiments of the present invention 2
Block diagram.
Fig. 5 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 3
Figure.
Fig. 6 is the welder for implementing double welding wire welding control methods involved by embodiments of the present invention 3
Block diagram.
Fig. 7 is the Current Voltage ripple used in the prior art among double welding wire welding methods of pulse electric arc welding
Shape figure.
Embodiment
Hereinafter, embodiments of the present invention are explained with reference to.
[embodiment 1]
Fig. 1 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 1
Figure.The figure (A) represents the time change of the average value Iav for the welding current being powered to welding welding wire, which represents
The time change of the average value Vav of the weldingvoltage applied between welding welding wire and mother metal (molten bath), the figure (C) represent filling weldering
The time change of the feed speed Fw of silk, the figure (D) represent the filler wire applied between filler wire and mother metal (molten bath)
The time change of voltage Vf.The feed speed of welding wire is welded although it is not shown, still with setting and by constant speed feed.The figure
(A) the weldingvoltage average value Vav shown in welding current average value Iav and the figure (B) shown in is made shown in above-mentioned Fig. 7
Impulse waveform equalization obtained by value, substantially steady state value.Hereinafter, illustrated with reference to the figure.
The feed speed Fw of filler wire shown in the figure (C) is configured to stablize filler wire feed speed Fc so as to fill out
Fill welding wire and be in short-circuit condition with molten bath.Apply the non-shorting detection voltage of such as 5V, the figure between filler wire and molten bath
(D) the filler wire voltage Vf shown in becomes 5V when filler wire is in non-shorting state, becomes when in short-circuit condition
0V。
It is that the guider of filler wire disappears as described above during moment t1~t2 and during moment t3~t5
Consume and produce the variation of feeding, so that during filler wire is changed into non-shorting state.In addition during, at filler wire
In short-circuit condition.The non-shorting period of moment t1~t2 is the feelings of the time span of the 1st predetermined a reference value Tt1 (second) of deficiency
Condition, the non-shorting period of moment t3~t5 are the situations of the time span more than the 1st a reference value Tt1.1st a reference value Tt1 quilts
It is set as that even if filler wire is changed into the time span that non-shorting state is also hardly impacted to welding bead.1st a reference value
Tt1 is set to such as 0.05~0.2 second degree.
Shown in such as figure (A), welding current average value Iav essentially becomes steady state value in whole period.Such as figure (B) institute
Show, weldingvoltage average value Vav also essentially becomes steady state value in whole period.Shown in such as figure (D), filler wire voltage Vf
Become 5V in during moment t1~t2 and during moment t3~t5, during in addition in become 0V.
Such as shown in the figure (C), the feed speed Fw of filler wire during except moment t1~t2 and moment t3~
Become predetermined stabilization filler wire feed speed Fc in during beyond during t5.Because the non-shorting shape of moment t1~t2
State is less than the 1st a reference value Tt1, so the feed speed Fw of filler wire keeps stable filler wire feed speed Fc constant.Cause
Be during for moment t3~t4 non-shorting state less than the 1st a reference value Tt1 during, so the feed speed Fw of filler wire
Keep stable filler wire feed speed Fc constant.If reach the 1st a reference value in the duration of the non-shorting states of moment t4
Tt1, then the feed speed of filler wire be accelerated into predetermined acceleration filler wire feed speed Fh steppedly.If when
Carve t5 filler wires and revert to short-circuit condition, then the feed speed Fw of filler wire is restored to stablize filler wire feed speed
Fc.Therefore, t4~t5 only at the time of the duration of the non-shorting state of filler wire more than the 1st a reference value Tt1 is changed into
In period, the feed speed Fw of filler wire is changed into accelerating filler wire feed speed Fh.To make non-shorting state promptly extensive
It is multiple into short-circuit condition, acceleration filler wire feed speed Fh be configured to than stablize filler wire feed speed Fc fast 30~
100% speed.If accelerate filler wire feed speed Fh too fast, the melting of filler wire when reverting to short-circuit condition
It is insufficient and become unstable.
In above-mentioned, as shown in the figure (C), the acceleration filler wire feed speed in showing during moment t4~t5
Fh is the situation of steady state value, but the side that can also be accelerated according to the process with the time untill its value reaches setting
Formula changes.That is, it also can with gradient accelerate from moment t4, and converge on setting.So, because being more non-short
Line state is long lasting for then accelerating the value of filler wire feed speed Fh to become faster, so reverting to the effect of short-circuit condition
Become strong.On the contrary, when non-shorting state reverts to short-circuit condition in advance, because accelerating the value of filler wire feed speed Fh simultaneously
It is fast not as becoming, so the melting for reverting to the filler wire after short-circuit condition hastily stabilizes.
When the feeding of filler wire is stablized, non-shorting state is hardly produced in welding.Therefore, when such as figure that
When sample produces non-shorting state, it may be said that into the variation that there is a situation where the feeding of filler wire.Especially, the 1st base is being produced
In the case of the non-shorting state of quasi- more than value Tt1, it is big to represent that it is changed.Thus, the production of the non-shorting state in having welding
When raw, alarm is sent based on its frequency and its duration.In the case where alarm occurs, welding operator terminates operation
Welding, is then replaced with the maintenance of the feed system of new product etc. into the guider for being about to filler wire.
Fig. 2 is the welding for implementing double welding wire welding control methods involved by above-mentioned embodiments of the present invention 1
The block diagram of device.The figure is to produce the electric arc 3 between welding welding wire 1 and molten bath 2 by consumable electrode formula pulse electric arc welding
Situation, output control (electric welding arc control) is the situation of above-mentioned frequency modulation(PFM) control.Hereinafter, illustrate with reference to the figure each
Block.
Electric power main circuit PM believes using the source power supply (illustration omitted) of 3 phase 200V etc. as input according to driving described later
Number Dv simultaneously carries out output control by inverter control, and output is used for the weldingvoltage Vw and welding current for producing electric arc 3
Iw.Although illustration omitted, electric power main circuit PM possesses：The primary rectifier circuit of rectification is carried out to source power supply, to quilt
The direct current of rectification carries out smooth capacitor, according to above-mentioned drive signal Dv and by the DC converting being smoothed into high-frequency ac
Inverter circuit, in order to produce electric arc 3 high-frequency ac is depressured into the high frequency transformer of appropriate magnitude of voltage, to being depressurized
High-frequency ac carry out the secondary commutation circuit of rectification and the direct current to being rectified carries out smooth reactor.
Non-shorting detection voltage applying circuit VS is that constant pressure source (illustration omitted) and resistor (illustration omitted) become series connection
Composition, be connected between filler wire 6 and molten bath 2.The value of the constant pressure source becomes above-mentioned non-shorting detection voltage Vs.This is non-
Even if short-circuit detecting voltage Vs, which is configured to filler wire 6, is changed into the value that non-shorting state does not produce electric arc yet, it is configured to 1~
8V degree.For example, it is set to the Ω of non-shorting detection voltage Vs=5V and resistor=50.If by filler wire 6 and molten bath 2
Between voltage be labeled as filler wire voltage Vf, then when filler wire 6 and molten bath 2 are in non-shorting state become filling weldering
Filament voltage Vf=5V, becomes Vf=0V when in short-circuit condition.When in short-circuit condition, to 6 energization 0.1A of filler wire
Electric current.
Welding welding wire 1 by the rotation for welding welding wire feeding roller 5 that is combined with welding wire feed motor WM and by into
Be given in welding torch 4, power from above-mentioned electric power main circuit PM via feeder ear (illustration omitted), thus with mother metal (molten bath)
Electric arc 3 is produced between 2.
Filler wire 6 by the rotation of the filler wire feed rolls 8 combined with filler wire feed motor FM and by into
It is given in filler wire guider 7, from above-mentioned non-shorting detection voltage applying circuit VS via feeder ear (illustration omitted)
Come the non-shorting detection voltage Vs that powers, occur to melt in the state of short circuit in the molten bath 2 with being formed by electric arc 3.In the figure, though
So show that welding torch 4 and filler wire guider 7 are the situation of different compositions, but two can also be fed from a welding torch
Welding wire (welding welding wire 1 and filler wire 6).
Emergency stop circuit ST outputs become the washout St of high level (High level) in emergent stopping.
Voltage detecting circuit VD detects above-mentioned weldingvoltage Vw, and voltage sense signal Vd.Voltage smoothing circuit
VAV is allowed to equalize (by the low-pass filtering of cutoff frequency 1~10Hz degree using voltage detection signal Vd as input
Device), output weldingvoltage average value signal Vav.Voltage setting circuit VR exports predetermined weldingvoltage setting signal Vr.Voltage
Error amplifying circuit EV amplifies the error of the weldingvoltage setting signal Vr and above-mentioned weldingvoltage average value signal Vav,
Output voltage error amplified signal Ev.
Voltage/frequency translation circuit VFC is transformed into the frequency proportional to the value of above-mentioned voltage error amplified signal Ev
Signal, become the pulse-period signal Tf of high level in the short time according to each frequency (pulse period) to export.By the electricity
Pressure/frequency-conversion circuit VFC controls to carry out above-mentioned frequency modulation(PFM).Initialization circuit TPR exports predetermined peak value during peak value
Period setting signal Tpr.Timer circuit TP is by during above-mentioned pulse-period signal Tf and above-mentioned peak value during peak value
Setting signal Tpr is exported and is changed into time of high level from pulse-period signal Tf and lights only by being set during peak value as input
Signal Tp during the peak value for determining to be changed into a period of signal Tpr is provided high level.Therefore, signal Tp is its cycle during the peak value
To be changed into the letter of low level (Low level) in a period of during being changed into high level, benchmark in a period of during pulse period, peak value
Number.
Peak point current initialization circuit IPR exports predetermined peak point current setting signal Ipr.Reference current initialization circuit IBR
Export predetermined background current setting signal Ibr.Electric current sets switching circuit SI by signal Tp during above-mentioned peak value, above-mentioned
Peak point current setting signal Ipr and above-mentioned background current setting signal Ibr is as input, and signal Tp is height during peak value
Exported during level (during peak value) using peak point current setting signal Ipr as electric current setting signal Ir, in low level (the base value phase
Between) when export using background current setting signal Ibr as electric current setting signal Ir.Current detection circuit ID detects above-mentioned weldering
Meet electric current Iw, output electric current measure signal Id.Current error amplifying circuit EI is to above-mentioned electric current setting signal Ir and above-mentioned
The error of current detection signal Id is amplified, output current error amplified signal Ei.Drive circuit DV puts the current error
Big signal Ei and above-mentioned washout St is as input, when washout St is low level, based on electric current
Error amplification signal Ei is used to drive in above-mentioned electric power main circuit PM based on its result to carry out PWM modulation control to export
Inverter circuit drive signal Dv, the not output drive signal Dv when washout St is high level.
Weld welding wire feeding speed initialization circuit WR and export predetermined welding welding wire feeding speed setting signal Wr.Welding weldering
Control circuit WC is using welding welding wire feeding speed setting signal Wr and above-mentioned washout St as defeated for silk feeding
Enter, when washout St is low level, be used for above-mentioned welding wire feed motor WM outputs with equivalent to weldering
The feed speed of the value of welding wire feeding speed setting signal Wr is connect to feed the welding welding wire feeding control signal of welding welding wire 1
Wc, when washout St is high level, does not export welding welding wire feeding control signal Wc.
Filler wire voltage detecting circuit VFD detects above-mentioned filler wire voltage Vf, exports filler wire voltage detecting
Signal Vfd.Non-shorting judging circuit SD is exported following non-shorting using the filler wire voltage detection signal Vfd as input
Differentiate signal Sd, i.e.,：It is determined as becoming in short-circuit condition in predetermined short circuit discrimination a reference value (2.5V) of value deficiency
Low level, is determined as becoming high electric in non-shorting state when the value is more than predetermined short circuit discrimination a reference value (2.5V)
It is flat.1st reference value circuit TT1 exports the 1st predetermined reference value signal Tt1.Non-shorting later stage judging circuit SDD will
Above-mentioned non-shorting differentiation signal Sd and the 1st reference value signal Tt1 makes non-shorting differentiation signal as input, output
Sd only turns on differentiation of the non-shorting later stage letter after delay (0n delay) period as defined in the 1st reference value signal Tt1
Number Sdd.The non-shorting later stage differentiates that signal Sdd is only to become to believe than the 1st reference value in the duration of non-shorting state
During the value length of number Tt1 (at the time of Fig. 1 during t4~t5) in become the signal of high level.
Stablize filler wire feed speed initialization circuit FCR and export predetermined stabilization filler wire feed speed setting signal
Fcr.Filler wire feed speed initialization circuit FHR is accelerated to export predetermined acceleration filler wire feed speed setting signal Fhr.
Filler wire feed speed sets switching circuit SF by above-mentioned stabilization filler wire feed speed setting signal Fcr, above-mentioned
Filler wire feed speed setting signal Fhr and above-mentioned non-shorting later stage is accelerated to differentiate signal Sdd as input, non-short
When road later stage differentiation signal Sdd is high level, filler wire feed speed setting signal Fhr will be accelerated to be fed as filler wire
Rate setting signal Fr is exported, and will stablize filler wire feed speed setting signal Fcr in low level as filler wire
Feed speed setting signal Fr is exported.Filler wire feeds control circuit FCT by the filler wire feed speed setting signal
Fr and above-mentioned washout St, when washout St is low level, is welded as input to above-mentioned filling
Silk feed motor FM output is used to feed with the feed speed of the value equivalent to filler wire feed speed setting signal Fr
The filler wire feeding control signal Fct of filler wire 6, when washout St is high level, does not export filler wire
Feed control signal Fct.
In the figure, constantly become larger to make acceleration filler wire feed speed Fh pass through with the time, as long as by such as
Under type changes above-mentioned acceleration filler wire feed speed initialization circuit FHR.That is, filler wire feed speed is accelerated to set
Determine circuit FHR and the above-mentioned non-shorting later stage is differentiated that signal Sdd as input, is exported and differentiated signal with from the non-shorting later stage
The acceleration filler wire feed speed setting signal Fhr that the time that the time that Sdd is changed into high level lights passes through and constantly becomes larger.
Although the figure is the situation that electric welding arc control is carried out by frequency modulation(PFM) control, pulse width modulation control can also be used
Other modulation controls such as system.
According to above-mentioned embodiment 1, differentiate that filler wire and molten bath become non-shorting state in welding, when this is non-
When short-circuit condition be continue for more than the 1st predetermined a reference value, make the feed speed of filler wire from predetermined stabilization filler wire
Feed speed accelerates to predetermined acceleration filler wire feed speed.It is short thereby, it is possible to make non-shorting state promptly revert to
Line state.Thus, in the present embodiment, even if producing non-shorting state due to the variation of the feeding of filler wire,
It can suppress welding bead variation.
In above-mentioned embodiment 1, although the description of fetching the situation that produces electric arc, but energy by pulse arc welding
Enough welded using all consumable electrode formula electric arcs.
[embodiment 2]
Embodiments of the present invention 2, the non-shorting state between filler wire and molten bath more than the 1st a reference value are recovered
During into short-circuit condition, the feed speed of filler wire is maintained and accelerates filler wire feed speed, untill welding terminates.
In above-mentioned embodiment 1, if reverting to short-circuit condition, it is restored to stablize filler wire feed speed, but in reality
Apply and maintain to accelerate filler wire feed speed as former state in mode 2.
Fig. 3 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 2
Figure.The figure (A) represents the time change of the average value Iav for the welding current being powered to welding welding wire, which represents
The time change of the average value Vav of the weldingvoltage applied between welding welding wire and mother metal (molten bath), the figure (C) represent filling weldering
The time change of the feed speed Fw of silk, the figure (D) represent the filler wire voltage Vf between filler wire and mother metal (molten bath)
Time change.The feed speed of welding wire is welded although it is not shown, still with setting and by constant speed feed.The figure with it is above-mentioned
Fig. 1 is corresponding, and action later only moment t5 is different.Hereinafter, the later actions of moment t5 are illustrated with reference to the figure.
Because be during moment t3~t4 non-short-circuit condition less than the 1st a reference value Tt1 during, filler wire
Feed speed Fw keeps stable filler wire feed speed Fc constant.If reach in the duration of the non-shorting states of moment t4
1st a reference value Tt1, then the feed speed of filler wire is stepped is accelerated into acceleration filler wire feed speed Fh.Even if
Moment t5 filler wire reverts to short-circuit condition, and the feed speed Fw of filler wire also maintains to accelerate filler wire feed speed Fh
Untill the welding of the workpiece terminates.Therefore, the 1st a reference value is become in the duration of the non-shorting state from filler wire
During t4 is untill welding terminates at the time of more than Tt1, the feed speed Fw of filler wire become accelerate filler wire into
Give speed Fh.
In above-mentioned, as shown in the figure (C), it is constant to show the later acceleration filler wire feed speed Fh of moment t4
The situation of value, but can also accelerate in the same manner as embodiment 1 according to the process with the time until its value reaches regulation
Mode untill value changes.That is, it also can with gradient accelerate from moment t4, and converge on setting.
Fig. 4 is the welding for implementing double welding wire welding control methods involved by above-mentioned embodiments of the present invention 2
The block diagram of device.The figure is corresponding with above-mentioned Fig. 2, assigns same label for same, and omit their explanation.The figure
It is the figure that the non-shorting later stage judging circuit SDD of Fig. 2 is replaced as to the 2nd non-shorting later stage judging circuit SDD2.Hereinafter, reference should
Figure illustrates the block.
2nd non-shorting later stage judging circuit SDD2 makees non-shorting differentiation signal Sd and the 1st reference value signal Tt1
For input, following differentiation of non-shorting later stage signal Sdd is exported, i.e.,：From non-shorting differentiation signal Sd be changed into high level when
Between light merely through being set to high level when during as defined in the 1st reference value signal Tt1, if welding and terminating
It is reset to low level.Non-shorting later stage differentiation signal Sdd is the duration of non-short-circuit condition to reach the 1st reference value
Become the signal of high level during after the time point of the value of signal Tt1 (during t4 is later at the time of Fig. 3).
It is non-shorting more than the 1st a reference value between filler wire and molten bath when determining according to above-mentioned embodiment 2
When state reverts to short-circuit condition, the feed speed of filler wire is maintained and accelerates filler wire feed speed, until welding
Untill end.Situation as producing non-shorting state more than 1st a reference value is that filler wire is fed with large variation
Situation.Therefore, in this case, even if also accelerating the feed speed of filler wire in short-circuit condition, so as to inhibit again
It is secondary to produce non-shorting state.
[embodiment 3]
In embodiments of the present invention 3, when the duration of non-shorting state reaches, value is bigger than the 1st a reference value to be made a reservation for
2 a reference value when, impose emergent stopping to stop welding.
Fig. 5 is the current-voltage waveform for representing double welding wire welding control methods involved by embodiments of the present invention 3
Figure.The figure (A) represents the time change of the average value Iav for the welding current being powered to welding welding wire, which represents
The time change of the average value Vav of the weldingvoltage applied between welding welding wire and mother metal (molten bath), the figure (C) represent filling weldering
The time change of the feed speed Fw of silk, the figure (D) represent the filler wire voltage Vf between filler wire and mother metal (molten bath)
Time change.The feed speed of welding wire is welded although it is not shown, still with setting by constant speed feed.The figure and above-mentioned figure
1 is corresponding, and action later only moment t5 is different.Hereinafter, the later actions of moment t5 are illustrated with reference to the figure.
Such as shown in the figure (C) because be during moment t3~t4 non-short-circuit condition less than the 1st a reference value Tt1 during,
So the feed speed Fw of filler wire keeps stable filler wire feed speed Fc constant.If in the non-shorting states of moment t4
Duration reach the 1st a reference value Tt1, then the feed speed of filler wire it is stepped is accelerated into accelerate filler wire feeding
Speed Fh.Afterwards, if reach in the duration of the non-shorting states of moment t5 bigger than the 1st a reference value value it is i.e. predetermined the 2nd
A reference value Tt2, then impose emergent stopping to stop welding.The stopping of so-called welding, refers to stop weldingvoltage Vw and welding
The output of electric current Iw, stops the feeding of welding welding wire 1, stops the feeding of filler wire 6.Therefore, in moment t5, such as the figure (A)
Shown welding current average value Iav is changed into 0A, and the weldingvoltage average value Vav as shown in the figure (B) is changed into 0V, such as figure (C) institute
Show that the feed speed Fw of filler wire is changed into 0, the filler wire voltage Vf as shown in the figure (D) is changed into 0V.
The 2nd above-mentioned a reference value Tt2 is set to become welding when non-shorting state continue for more than the time span
The value of defect.Its setting range is 0.3~1.0 second degree.
Fig. 6 is the welding for implementing double welding wire welding control methods involved by above-mentioned embodiments of the present invention 3
The block diagram of device.The figure is corresponding with above-mentioned Fig. 2, assigns same label for same, and omit their explanation.The figure
It is the figure that the emergency stop circuit ST of Fig. 2 is replaced as to the 2nd emergency stop circuit ST2.Hereinafter, the block is illustrated with reference to the figure.
2nd emergency stop circuit ST2 is changed into using non-shorting differentiation signal Sd as input when from non-shorting differentiation signal Sd
When the elapsed time that the time of high level lights reaches the 2nd predetermined a reference value Tt2, the emergent stopping of high level is output into
Signal St.
According to above-mentioned embodiment 3, reach bigger than the 1st a reference value when the duration of the non-shorting state of filler wire
Value, that is, predetermined 2 a reference value when, stop welding.Thus, when it can determine welding bead and become bad, can stop welding
Connect.Thus, can be in the base of the maintenance for the feed system for implementing the guider of filler wire etc. without carrying out unnecessary welding
That is welded in advance on plinth restarts.
, can also embodiment 2 although embodiment 3 adds emergency stop function based on embodiment 1
Based on add.
Label declaration
1 welding welding wire
2 mother metals, molten bath
3 electric arcs
4 welding torches
5 welding welding wire feeding rollers
6 filler wires
7 filler wire guiders
8 filler wire feed rolls
DV drive circuits
Dv drive signals
EI current error amplifying circuits
Ei current error amplified signals
EV voltage error amplifying circuits
Ev voltage error amplified signals
Fc stablizes filler wire feed speed
FCR stablizes filler wire feed speed initialization circuit
Fcr stablizes filler wire feed speed setting signal
FCT filler wires feed control circuit
Fct filler wires feed control signal
Fh accelerates filler wire feed speed
FHR accelerates filler wire feed speed initialization circuit
Fhr accelerates filler wire feed speed setting signal
FM filler wire feed motors
Fr filler wire feed speed setting signals
Fw feed speeds
Iav welding current average values
Ib reference currents
IBR reference current initialization circuits
Ibr reference current setting signals
ID current detection circuits
Id current detection signals
Ip peak point currents
IPR peak point current initialization circuits
Ipr peak point current setting signals
Ir electric current setting signals
Iw welding currents
PM electric power main circuits
The non-shorting judging circuits of SD
The non-shorting differentiation signals of Sd
The non-shorting later stage judging circuits of SDD
The Sdd non-shorting later stages differentiate signal
The 2nd non-shorting later stage judging circuits of SDD2
SF filler wires feed speed sets switching circuit
SI electric currents set switching circuit
ST emergency stop circuits
St washouts
The 2nd emergency stop circuits of ST2
During Tb base values
The Tf pulse periods (signal)
Timer circuit during TP peak values
During Tp peak values (signal)
Initialization circuit during TPR peak values
Setting signal during Tpr peak values
The 1st reference value circuits of TT1
The 1st a reference values (setting signal) of Tt1
The 2nd a reference values of Tt2
VAV voltage smoothing circuits
Vav weldingvoltages average value (signal)
Vb base value voltages
VD voltage detecting circuits
Vd voltage detection signals
Vf filler wire voltages
VFC voltage/frequency translation circuits
VFD filler wire voltage detecting circuits
Vfd filler wire voltage detection signals
Vp crest voltages
VR voltage setting circuits
Vr weldingvoltage setting signals
The non-shorting detection voltage applying circuits of VS
The non-shorting detection voltages of Vs
Vw weldingvoltages
WC welds welding wire feeding control circuit
Wc welds welding wire feeding control signal
WM welds wire feed motor
WR welds welding wire feeding speed initialization circuit
Wr welds welding wire feeding speed setting signal
Claims (3)
1. a kind of double welding wire welding control methods, produce electric arc to form molten bath, according to filling between consumable electrode and mother metal
Welding wire feeds filler wire to weld with mode of the above-mentioned molten bath in short-circuit condition, the feature of this pair of welding wire welding control method
It is,
Differentiate that above-mentioned filler wire and above-mentioned molten bath are in non-shorting state in above-mentioned welding, when the non-shorting state continues
When more than the 1st predetermined a reference value, make the feed speed of above-mentioned filler wire from predetermined stabilization filler wire feed speed
Predetermined acceleration filler wire feed speed is accelerated to,
Recover when determining the above-mentioned non-shorting state between above-mentioned filler wire and above-mentioned molten bath more than above-mentioned 1st a reference value
During into above-mentioned short-circuit condition, the feed speed of above-mentioned filler wire is maintained above-mentioned acceleration filler wire feed speed until upper
State untill welding terminates.
2. double welding wire welding control methods according to claim 1, it is characterised in that
By applying non-shorting differentiation voltage between above-mentioned filler wire and above-mentioned molten bath, come carry out above-mentioned filler wire with it is upper
State the differentiation in above-mentioned short-circuit condition or above-mentioned non-shorting state between molten bath.
3. double welding wire welding control methods according to claim 1 or 2, it is characterised in that
When the duration of above-mentioned non-shorting state reaching predetermined 2 a reference value bigger than above-mentioned 1st a reference value, in stopping
State welding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-149010 | 2013-07-18 | ||
| JP2013149010A JP6144137B2 (en) | 2013-07-18 | 2013-07-18 | 2-wire welding control method |
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| CN104289790A CN104289790A (en) | 2015-01-21 |
| CN104289790B true CN104289790B (en) | 2018-04-13 |
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| JP (1) | JP6144137B2 (en) |
| KR (1) | KR102134488B1 (en) |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759248Y2 (en) * | 1976-03-26 | 1982-12-17 | ||
| CN101821048A (en) * | 2007-10-16 | 2010-09-01 | 株式会社大亨 | Arc start control method |
| CN102205454A (en) * | 2010-03-31 | 2011-10-05 | 株式会社大亨 | Electric arc welding method |
| CN103084705A (en) * | 2011-10-28 | 2013-05-08 | 株式会社大亨 | Current control method during necking detection of fusion electrode electric arc welding |
| JP2013094850A (en) * | 2011-11-07 | 2013-05-20 | Panasonic Corp | Method of controlling arc welding and apparatus for arc welding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05305441A (en) | 1992-04-30 | 1993-11-19 | Ishikawajima Harima Heavy Ind Co Ltd | Method for detecting welding wire running out |
| JP5706710B2 (en) | 2011-02-18 | 2015-04-22 | 株式会社ダイヘン | 2-wire welding control method |
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2013
- 2013-07-18 JP JP2013149010A patent/JP6144137B2/en active Active
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5759248Y2 (en) * | 1976-03-26 | 1982-12-17 | ||
| CN101821048A (en) * | 2007-10-16 | 2010-09-01 | 株式会社大亨 | Arc start control method |
| CN102205454A (en) * | 2010-03-31 | 2011-10-05 | 株式会社大亨 | Electric arc welding method |
| CN103084705A (en) * | 2011-10-28 | 2013-05-08 | 株式会社大亨 | Current control method during necking detection of fusion electrode electric arc welding |
| JP2013094850A (en) * | 2011-11-07 | 2013-05-20 | Panasonic Corp | Method of controlling arc welding and apparatus for arc welding |
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| KR102134488B1 (en) | 2020-07-15 |
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| JP2015020186A (en) | 2015-02-02 |
| KR20150010582A (en) | 2015-01-28 |
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