CN104275540A - Output control method for welding power source - Google Patents
Output control method for welding power source Download PDFInfo
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- CN104275540A CN104275540A CN201410283059.6A CN201410283059A CN104275540A CN 104275540 A CN104275540 A CN 104275540A CN 201410283059 A CN201410283059 A CN 201410283059A CN 104275540 A CN104275540 A CN 104275540A
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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
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
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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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
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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
- B23K9/095—Monitoring or automatic control of welding parameters
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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
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
- B23K9/1006—Power supply
- B23K9/1043—Power supply characterised by the electric circuit
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- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
- Generation Of Surge Voltage And Current (AREA)
Abstract
The invention provides an output control method for a welding power source. When a plurality of welding power sources are used at the same time, the welding power sources are prevented from being influenced by the welding currents of other welding power sources. Therefore, the welding voltage is lowered and the welding state is made unstable. The output of a welding power source (PS1) is controlled, so that the voltage detection value is equal to a voltage preset value (Vr1). In voltage detection value (Vd), according to the through power from a welding power source of the total welding current (Ig) a common energizing the electric resistance value (Rg) path and the generated voltage (Vw1)-overlapping with the welding voltage. In a common electrical path, from the other of the energized the welding power supply with the welding current is not energized, the voltage compared to a set value (Vr1) is set to increase the voltage increase (delta Vr) detecting welding power supply is energized from the other of the welding current for a total of to the mean value of the (Igd-Id), a voltage increase the value according to the delta Vr=Rg*(Igd-Id) operation are automatically set. Therefore, it is possible to suppress the reduction of the welding voltage (Vw1).
Description
Technical field
The present invention relates to and by multiple source of welding current, electric arc is produced respectively to public workpiece and weld, and in power supply at least 1 carries out exporting the output control method controlled to make the source of welding current that weldingvoltage detected value is equal with predetermined voltage setting value.
Background technology
For the workpiece having multiple welding position, sometimes use multiple source of welding current to weld simultaneously.Below, be described for welder under such circumstances with reference to accompanying drawing.
Fig. 5 is for using 2 sources of welding current simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.2 sources of welding current are all by sacrificial electrode electric arc welding power supply that constant voltage controls.Below, with reference to Fig. 5, each construct is described.
1st source of welding current PS1 exports the 1st output voltage Vo1 and the 1st welding current Iw1, and exports the 1st feeding control signal Fc1 to the 1st feeding machine FD1.1st output voltage Vo1 and the 1st welding current Iw1 is instantaneous value.1st welding wire 11, using the 1st feeding control signal Fc1 as input, passes in the 1st welding torch 41 and carries out feeding by the 1st feeding machine FD1.Between the 1st welding wire 11 and workpiece 2, produce the 1st electric arc 31 weld.1st welding torch 41 is held by robot (omitting diagram).Workpiece 2 is arranged in fixture 5.
The positive terminal of the 1st source of welding current PS1 is connected via cable with the 1st feeder ear 61 in the 1st welding torch 41.In addition, the negative terminal of the 1st source of welding current PS1 is connected via cable with fixture 5.Below, the resistance value of the total of these cables is expressed as the 1st cable resistance value Rc1.1st weldingvoltage Vw1 is the voltage applied between the 1st feeder ear 61 and the surface of workpiece 2.In addition, the 1st output voltage Vo1 is the voltage applied between the lead-out terminal of the 1st source of welding current PS1.
1st voltage detecting circuit VD1 detects above-mentioned 1st output voltage Vo1, exports the 1st voltage detection signal Vd1.1st voltage setting circuit VR1 exports predetermined 1st voltage setting signal Vr1.1st voltage error amplifying circuit EV1 amplifies the error between above-mentioned 1st voltage setting signal Vr1 (+) and above-mentioned 1st voltage detection signal Vd1 (-), and exports the 1st voltage error amplifying signal Ev1.1st voltage error amplifying signal Ev1 inputs to above-mentioned 1st source of welding current PS1, is carried out constant voltage control based on this signal.
2nd source of welding current PS2 exports the 2nd output voltage Vo2 and the 2nd welding current Iw2, and exports the 2nd feeding control signal Fc2 to the 2nd feeding machine FD2.2nd output voltage Vo2 and the 2nd welding current Iw2 is instantaneous value.2nd welding wire 12 as input, passes in the 2nd welding torch 42 and carries out feeding by the 2nd feeding machine FD2 by the 2nd feeding control signal Fc2.Between the 2nd welding wire 12 and workpiece 2, produce the 2nd electric arc 32 weld.2nd welding torch 42 is held by robot (omitting diagram).
The positive terminal of the 2nd source of welding current PS2 is connected via cable with the 2nd feeder ear 62 in the 2nd welding torch 42.In addition, the negative terminal of the 2nd source of welding current PS2 is connected via cable with fixture 5.Below, the resistance value of the total of these cables is expressed as the 2nd cable resistance value Rc2.2nd weldingvoltage Vw2 is the voltage applied between the 2nd feeder ear 62 and the surface of workpiece 2.In addition, the 2nd output voltage Vo2 is the voltage applied between the lead-out terminal of the 2nd source of welding current PS2.
2nd voltage detecting circuit VD2 detects above-mentioned 2nd output voltage Vo2, and exports the 2nd voltage detection signal Vd2.2nd voltage setting circuit VR2 exports predetermined 2nd voltage setting signal Vr2.2nd voltage error amplifying circuit EV2 amplifies the error between above-mentioned 2nd voltage setting signal Vr2 (+) and above-mentioned 2nd voltage detection signal Vd2 (-), and exports the 2nd voltage error amplifying signal Ev2.2nd voltage error amplifying signal Ev2 inputs to above-mentioned 2nd source of welding current PS2, is carried out constant voltage control based on this signal.
1st welding current Iw1 is energized according to the path of the negative terminal of positive terminal → the 1st feeder ear the 61 → 1st welding wire 11 → workpiece 2 → fixture the 5 → 1st source of welding current PS1 of the 1st source of welding current PS1.2nd welding current Iw2 is energized according to the path of the negative terminal of positive terminal → the 2nd feeder ear the 62 → 2nd welding wire 12 → workpiece 2 → fixture the 5 → 2nd source of welding current PS2 of the 2nd source of welding current PS2.Therefore, in workpiece 2 and fixture 5, the 1st welding current Iw1 and the 2nd welding current Iw2 is energized.The electric current obtained after being amounted to by these the 1st welding current Iw1 and the 2nd welding current Iw2 amounts to welding current Ig in following being called as.Further, the workpiece 2 be energized by this total welding current Ig and fixture 5 are called public electrical path.This public electrical path has resistance value.Below, the resistance value of this public electrical path is expressed as common electrical resistance Rg.
Above-mentioned 1st voltage detecting circuit VD1, above-mentioned 1st voltage setting circuit VR1 and above-mentioned 1st voltage error amplifying circuit EV1 are built in the 1st source of welding current PS1.Above-mentioned 2nd voltage detecting circuit VD2, above-mentioned 2nd voltage setting circuit VR2 and above-mentioned 2nd voltage error amplifying circuit EV2 are built in the 2nd source of welding current PS2.
The mean value of above-mentioned 1st output voltage Vo1 is recited as Vo1 (a), the mean value of above-mentioned 1st weldingvoltage Vw1 is recited as Vw1 (a), the mean value of above-mentioned 1st welding current Iw1 is recited as Iw1 (a), the mean value of above-mentioned total welding current Ig is recited as Ig (a).Like this, following formula is set up.
Vo1(a)＝Vw1(a)+Rc1·Iw1(a)+Rg·Ig(a)
Here, the 1st output voltage average value Vo1 (a) is set by the 1st voltage setting signal Vr1, so both displacements arrange obtain following formula.
Vr1＝Vw1(a)+(Rc1+Rg)·Iw1(a)+Rg·(Ig(a)-Iw1(a))
Further, Vw1 (passes through a) to arrange, obtains following formula.
Vw1 (a)=Vr1-(Rc1+Rg) Iw1 (a)-Rg (Ig (a)-Iw1 (a)) ... (1) formula
If the 1st weldingvoltage mean value Vw1 (a) is desired value, then the 1st electric arc 31 becomes stable state.When the 1st voltage setting signal Vr1 is set as setting, when the welding current from other the source of welding current is not energized and when being energized, the 1st weldingvoltage mean value Vw1 (a) changes the voltage Rg (Ig (a)-Iw1 (a)) produced according to common electrical resistance Rg.Namely, if when the welding current from other the source of welding current is not energized, the 1st voltage setting signal Vr1 is set in order to make the generation of the 1st electric arc 31 in stable condition, then when the welding current energising from other the source of welding current, the 1st weldingvoltage mean value Vw1 (a) voltage that according to common electrical resistance Rg produces lower than desired value.Its result, the generation state of the 1st electric arc 31 also becomes unstable.In Figure 5, the mean value from the aggregate values of the welding current of other the source of welding current is (Ig (a)-Iw1 (a))=Iw2 (a).
Fig. 6 is the sequential chart of each signal of above-mentioned welder in Fig. 5.Fig. 6 (A) represents the time variations of the 1st welding current mean value Iw1 (a), Fig. 6 (B) represents the time variations of the 1st voltage setting signal Vr1, Fig. 6 (C) represents the time variations of the 1st weldingvoltage mean value Vw1 (a), and Fig. 6 (D) represents the time variations of the 2nd welding current mean value Iw2 (a).In Fig. 6, during moment t1 ~ t2, only the 1st welding current energising, during moment t2 ~ t3, the 1st welding current and the energising of the 2nd welding current.Below, be described with reference to Fig. 6.
(1) when the welding current from other the source of welding current is not energized (during moment t1 ~ t2)
As shown in Fig. 6 (A), during moment t1 ~ t2, only the 1st welding current energising.As shown in Fig. 6 (B), the 1st voltage setting signal Vr1 is set as desired value according to the mode making the 1st electric arc 31 during this period become stable state.As shown in Fig. 6 (C), the 1st weldingvoltage mean value Vw1 (a) becomes desired value.
(2) when the welding current energising from other the source of welding current (during moment t2 ~ t3)
During moment t2 ~ t3, as shown in Fig. 6 (D), the 2nd welding current energising.As shown in Fig. 6 (A), the 1st welding current mean value Iw1 (a) is fixed value during moment t1 ~ t3.As shown in Fig. 6 (B), the value of the 1st voltage setting signal Vr1 is also fixed value during moment t1 ~ t3.Thus, as shown in Fig. 6 (C), the 1st weldingvoltage mean value Vw1 (a) ratio during moment t2 ~ t3 is low during moment t1 ~ t2.This reduction amplitude becomes voltage Rg (Ig (a)-Iw1 (a))=RgIw2 (a) produced according to common electrical resistance Rg.Fig. 6 is illustrated for the 1st source of welding current PS1, but also identical for the 2nd source of welding current PS2.
The invention of patent document 1, when detecting to the voltage providing the load of the electric current temporally changed to apply, in this detection voltage, except the load voltage of only load, also comprise the voltage loss produced based on reactance amount and resistance and carry out in the load voltage detection system detected, possess: reactance value/resistance value calculation element, it precalculates and each value of the reactance amount stored beyond above-mentioned load and resistance, and exports the reactance value and resistance value that store when load current supplies; With load voltage calculation element, the load voltage that its detection moment when load current supplies changes, put on the corresponding voltage of reactance based on what calculate from the reactance value of above-mentioned reactance value/resistance value calculation element and resistance value that the moment changes and put on the corresponding voltage of resistance, from above-mentioned detection voltage, deduct each corresponding voltage, and only calculate the load voltage of the load as object.That is, in Figure 5, relate to and remove the voltage produced according to the 1st cable resistance value Rc1 and common electrical resistance Rg from the value of the 1st voltage detection signal Vd1, correctly calculate the method for the 1st weldingvoltage Vw1.
Patent document 1:JP JP 7-115183 publication
Summary of the invention
Therefore, in the present invention, object is, a kind of output control method of the source of welding current is provided, in the output control method of this source of welding current, produce electric arc by multiple source of welding current respectively to public workpiece to weld, at least 1 in these sources of welding current is carried out constant voltage and is controlled, when not being energized from the welding current of other the source of welding current in public electrical path, energising when can both maintain stable welded condition.
In order to solve above-mentioned problem, the invention of technical scheme 1 is a kind of output control method of the source of welding current, produce electric arc by multiple source of welding current respectively to public workpiece to weld, at least 1 in the above-mentioned source of welding current is carried out output and controls, to make voltage detecting value equal with predetermined voltage setting value, in the output control method of this source of welding current, in above-mentioned voltage detecting value, the voltage produced from the resistance value of the public electrical path of the welding current of the above-mentioned source of welding current according to energising and weldingvoltage overlap, above-mentioned voltage setting value is set as during the above-mentioned welding current being energized from other the above-mentioned source of welding current in above-mentioned public electrical path increasing voltage value added compared with when not being energized.
The feature of the invention of technical scheme 2 is, according to the output control method of the source of welding current that technical scheme 1 is recorded, the value that above-mentioned voltage value added obtains after being redefined for and being multiplied with above-mentioned resistance value by the mean value of the aggregate values of the above-mentioned welding current from other above-mentioned source of welding current energising.
The feature of the invention of technical scheme 3 is, according to the output control method of the source of welding current that technical scheme 1 is recorded, detect the mean value of the aggregate values of the above-mentioned welding current of the above-mentioned source of welding current energising from other, the value obtained after above-mentioned voltage value added is automatically set to the above-mentioned mean value detected to be multiplied with above-mentioned resistance value.
Invention effect
According to the present invention, can suppress to result from due to the voltage that produces from the welding current of other the source of welding current that is energized in public electrical path, weldingvoltage reduces than desired value and welded condition becomes unstable.Thus, in the present invention, produce electric arc by multiple source of welding current respectively to public workpiece to weld, at least 1 source of welding current in these sources of welding current is carried out constant voltage and is controlled, when not being energized from the welding current of other the source of welding current in public electrical path, energising when, stable welded condition can both be maintained.
Accompanying drawing explanation
Fig. 1 is that 2 sources of welding current for using embodiments of the present invention 1 to relate to are simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.
Fig. 2 is the sequential chart of each signal in Fig. 1 in above-mentioned welder.
Fig. 3 is that 2 sources of welding current for using embodiments of the present invention 2 to relate to are simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.
Fig. 4 is the sequential chart of each signal in Fig. 3 in above-mentioned welder.
Fig. 5 is in the prior art for using 2 sources of welding current simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.
Fig. 6 is the sequential chart of each signal in the welder described in Fig. 5.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of embodiments of the present invention.
Embodiment 1
Fig. 1 is that 2 sources of welding current for using embodiments of the present invention 1 to relate to are simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.Fig. 1 is corresponding with above-mentioned Fig. 5, adds same-sign for identical construct, does not repeat these explanations.In FIG, for the purpose of simplifying the description, the invention of embodiment 1 is only implemented for the 1st source of welding current PS1.Therefore, the 2nd source of welding current PS2 is the source of welding current same as the prior art.Fig. 1 has added total welding current testing circuit IGD, welding current testing circuit ID, current electrifying judging circuit CD, voltage value added initialization circuit DVR and Control of Voltage initialization circuit VCR in Figure 5.Below, with reference to Fig. 1, these constructs are described.
Amount to welding current testing circuit IGD detect the total welding current Ig that is energized in public electrical path and average, export total welding current detection signal Igd.In this manual, equalization is undertaken by the low pass filter with the cut-off frequency of about 1 ~ 10Hz.
Welding current testing circuit ID detects the 1st welding current Iw1 and averages, and exports welding current detection signal Id.
Current electrifying judging circuit CD using above-mentioned total welding current detection signal Igd and above-mentioned welding current detection signal Id as input, carry out the subtraction of Igd-Id, when this subtraction value is more than threshold value, be output into the current electrifying judgment signal Cd of high level.Set the threshold to about 10A.Igd-Id, in above-mentioned (1) formula, carries out computing to (Ig (a)-Iw1 (a)).This subtraction value, from the 1st source of welding current PS1, is equivalent to the mean value of the aggregate values of the welding current of the source of welding current from other.Therefore, when above-mentioned current electrifying judgment signal Cd is high level, when being the welding current energising from other the source of welding current, when low level, be when not being energized.In Fig. 1, the so-called welding current from other the source of welding current is the 2nd welding current Iw2.
Voltage value added initialization circuit DVR exports predetermined voltage value added setting signal Δ Vr.This voltage value added setting signal Δ Vr is set as the value obtained after the mean value of the aggregate values of the welding current be energized by the source of welding current from other is multiplied with common electrical resistance Rg.Assay method for common electrical resistance Rg illustrates later.In addition, the value also can trying to achieve the 1st voltage setting signal Vr1 when making the welding current energising from other the source of welding current is by experiment more how many than increasing when not being energized, and welded condition becomes stable, and sets this voltage value added setting signal Δ Vr.
Control of Voltage initialization circuit VCR using the 1st voltage setting signal Vr1, above-mentioned voltage value added setting signal Δ Vr and above-mentioned current electrifying judgment signal Cd as input, when current electrifying judgment signal Cd is high level, the addition value of the 1st voltage setting signal Vr1 and voltage value added setting signal Δ Vr is exported as Control of Voltage setting signal Vcr, when low level, the 1st voltage setting signal Vr1 is exported as Control of Voltage setting signal Vcr.Control of Voltage setting signal Vcr inputs to the 1st voltage error amplifying circuit EV1.Due to this circuit, Control of Voltage setting signal Vcr becomes Vr1+ Δ Vr during the welding current energising from other the source of welding current, during not being energized, become Vr1.In robot welding, also can generate current electrifying judgment signal Cd by operation procedure is signal during high level.When teaching sealing wire, in the interval that the welding current from other the source of welding current is energized, become the mode of the value of large voltage value added setting signal Δ Vr to be made operation procedure according to making the setting value of the 1st voltage setting signal Vr1.
Above-mentioned welding current testing circuit ID, above-mentioned current electrifying judging circuit CD, above-mentioned voltage value added initialization circuit DVR and above-mentioned Control of Voltage initialization circuit VCR can be built in the 1st source of welding current PS1.
In Fig. 1, for the 2nd source of welding current PS2, the circuit identical with the 1st source of welding current PS1 can be set to and form, implement the invention of embodiment 1.
Fig. 2 is the sequential chart of each signal in Fig. 1 in above-mentioned welder.Fig. 2 (A) represents the time variations of the 1st welding current mean value Iw1 (a), Fig. 2 (B) represents the time variations of the 1st voltage setting signal Vr1, Fig. 2 (C) represents the time variations of the 1st weldingvoltage mean value Vw1 (a), Fig. 2 (D) represents the time variations of the 2nd welding current mean value Iw2 (a), Fig. 2 (E) represents the time variations of current electrifying judgment signal Cd, and Fig. 2 (F) represents the time variations of Control of Voltage setting signal Vcr.In Fig. 2, during moment t1 ~ t2, be only energized the 1st welding current, during moment t2 ~ t3, and energising the 1st welding current and the 2nd welding current.Fig. 2 is corresponding with above-mentioned Fig. 6, does not repeat identical explanation.Below, with reference to Fig. 2, different actions is described.
(1) when the welding current from other the source of welding current is not energized (during moment t1 ~ t2)
Action is during this period substantially identical with Fig. 6.Namely, in this period, as shown in Fig. 2 (D), because the welding current from other the source of welding current i.e. the 2nd welding current mean value Iw2 (a) is 0A, so as shown in Fig. 2 (E), current electrifying judgment signal Cd becomes low level.Thus, as shown in Fig. 2 (F), the value of Control of Voltage setting signal Vcr becomes identical with the value of the 1st voltage setting signal Vr1 shown in Fig. 2 (B).Its result, as shown in Fig. 2 (C), the 1st weldingvoltage mean value Vw1 (a) becomes the value set according to the 1st voltage setting signal Vr1.
(2) when the welding current energising from other the source of welding current (during moment t2 ~ t3)
In this period, as shown in Fig. 2 (D), because the welding current from other the source of welding current i.e. the 2nd welding current mean value Iw2 (a) is for more than threshold value, so as shown in Fig. 2 (E), current electrifying judgment signal Cd becomes high level.Thus, as shown in Fig. 2 (F), the value of Control of Voltage setting signal Vcr become in the value of the 1st voltage setting signal Vr1 shown in Fig. 2 (B), add the value of voltage value added setting signal Δ Vr after the value that obtains.Its result, as shown in Fig. 2 (C), the 1st weldingvoltage mean value Vw1 (a) becomes the desired value roughly the same with during moment t1 ~ t2.Therefore, the generation state of the 1st electric arc 31 can maintain stable state.In Fig. 6 of prior art, the value of the 1st weldingvoltage mean value Vw1 (a) reduces than desired value due to the voltage produced in common electrical resistance Rg.In embodiment 1, improve such state.
Under the state that the common electrical resistance Rg of public electrical path is set to using state welder is arranged at scene, measure before welding procedure and set.As the example of assay method, the analyzers such as the LCR instrument that market can be used to sell carry out.In addition, also can be measured by following such step.
1) the 1st feeder ear 61 is set to the state that to contact with workpiece 2.
2) from the electric current I p that the 1st source of welding current PS1 energising is fixing.
3) the voltage Vp at the two ends (between the surface of workpiece 2 and fixture 5) of public electrical path is now measured.
4) Rg=Vp/Ip is calculated.
According to above-mentioned embodiment 1, voltage setting value is set as, when being energized from the welding current of other the source of welding current in public electrical path, increases voltage value added than when not being energized.Thereby, it is possible to suppress to result from the voltage produced due to the welding current energising from other the source of welding current in public electrical path, weldingvoltage reduces than desired value and welded condition becomes unstable situation.Thus, in the present embodiment, produce electric arc by multiple source of welding current respectively to public workpiece to weld, at least 1 in these sources of welding current is carried out constant voltage and is controlled, when not being energized from the welding current of other the source of welding current in public electrical path, energising when can both maintain stable welded condition.
Embodiment 2
In the invention of above-mentioned embodiment 1, preset voltage value added.In contrast, in the invention of embodiment 2, voltage value added is automatically made in welding the value obtained after the mean value of the aggregate values of the welding current from other source of welding current energising is multiplied by common resistance value constantly.
Fig. 3 is that 2 sources of welding current for using embodiments of the present invention 2 to relate to are simultaneously to the pie graph of the welder that 2 welding positions of 1 workpiece weld.Fig. 3 is corresponding with above-mentioned Fig. 1, adds same-sign for identical construct, does not repeat their explanation.In figure 3, for the purpose of simplifying the description, only the 1st source of welding current PS1 is implemented to the invention of embodiment 2.Therefore, the 2nd source of welding current PS2 is the source of welding current same as the prior art.Fig. 3 deletes the current electrifying judging circuit CD of Fig. 1, the voltage value added initialization circuit DVR of Fig. 1 is replaced into the 2nd voltage value added initialization circuit DVR2, and the Control of Voltage initialization circuit VCR of Fig. 1 is replaced into the 2nd Control of Voltage initialization circuit VCR2.Below, with reference to Fig. 3, these constructs are described.
2nd voltage value added initialization circuit DVR2 will amount to welding current detection signal Igd and welding current detection signal Id as input, preset common electrical resistance Rg, carry out the computing of Rg (Igd-Id) constantly, and export as voltage value added setting signal Δ Vr.Rg (Igd-Id), in above-mentioned (1) formula, carries out computing to Rg (Ig (a)-Iw1 (a)).Thus, computing is carried out to the magnitude of voltage owing to producing from the welding current energising of other the source of welding current in public electrical path.
1st voltage setting signal Vr1 and above-mentioned voltage value added setting signal Δ Vr as input, is added two values, exports as Control of Voltage setting signal Vcr by the 2nd Control of Voltage initialization circuit VCR2.By this circuit, Control of Voltage setting signal becomes Vcr=Vr1+ Δ Vr.Further, the value of the voltage value added setting signal Δ Vr during being energized from the welding current of other the source of welding current is the value obtained after being multiplied with common electrical resistance Rg by the mean value of the aggregate values of the welding current from other the source of welding current.On the other hand, the value of the voltage value added setting signal Δ Vr during not being energized from the welding current of other the source of welding current becomes 0.
Also above-mentioned 2nd voltage value added initialization circuit DVR2 and above-mentioned 2nd Control of Voltage initialization circuit VCR2 can be built in the 1st source of welding current PS1.
In figure 3, for the 2nd source of welding current PS2, also can be set to the circuit identical with the 1st source of welding current PS1 and form, implement the invention of embodiment 2.
Fig. 4 is the sequential chart of each signal in the welder described in Fig. 3.Fig. 4 (A) represents the time variations of the 1st welding current mean value Iw1 (a), Fig. 4 (B) represents the time variations of the 1st voltage setting signal Vr1, Fig. 4 (C) represents the time variations of the 1st weldingvoltage mean value Vw1 (a), Fig. 4 (D) represents the time variations of the 2nd welding current mean value Iw2 (a), Fig. 4 (E) is different from Fig. 2, represent the time variations of voltage value added setting signal Δ Vr, Fig. 4 (F) represents the time variations of Control of Voltage setting signal Vcr.In Fig. 4, during moment t1 ~ t2, be only energized the 1st welding current, during moment t2 ~ t3, and energising the 1st welding current and the 2nd welding current.Fig. 4 is corresponding with above-mentioned Fig. 2, does not repeat identical explanation.Below, with reference to Fig. 4, different action is described.
(1) when not being energized from the welding current of other the source of welding current (during moment t1 ~ t2)
Action is during this period identical with Fig. 2.Namely, in this period, as shown in Fig. 4 (D), welding current i.e. the 2nd welding current mean value Iw2 (a) from other the source of welding current is 0A, so as shown in Fig. 4 (E), the value of voltage value added setting signal Δ Vr is 0.Thus, as shown in Fig. 4 (F), the value of Control of Voltage setting signal Vcr is identical with the value of the 1st voltage setting signal Vr1 shown in Fig. 4 (B).Its result, as shown in Fig. 4 (C), the 1st weldingvoltage mean value Vw1 (a) is the value set according to the 1st voltage setting signal Vr1.
(2) when the welding current energising from other the source of welding current (during moment t2 ~ t3)
In this period, as shown in Fig. 4 (D), because the welding current from other the source of welding current i.e. the 2nd welding current mean value Iw2 (a) is for more than threshold value, so as shown in Fig. 4 (E), voltage value added setting signal Δ Vr becomes Rg (Igd-Id).Thus, as shown in Fig. 4 (F), the value of Control of Voltage setting signal Vcr become in the value of the 1st voltage setting signal Vr1 shown in Fig. 4 (B), add the value of voltage value added setting signal Δ Vr after the value that obtains.Its result, as shown in Fig. 4 (C), the 1st weldingvoltage mean value Vw1 (a) becomes the desired value roughly the same with during moment t1 ~ t2.Therefore, the generation state of the 1st electric arc 31 can maintain stable state.In Fig. 6 of prior art, the value of the 1st weldingvoltage mean value Vw1 (a), reduces than desired value due to the voltage produced in common electrical resistance Rg.The state such at embodiment 2 improves.
According to above-mentioned embodiment 2, detect the mean value of the aggregate values of the welding current of the source of welding current energising from other, the value that voltage value added obtains after being automatically made and being multiplied with common electrical resistance by the mean value detected.Thus, in the present embodiment, except the effect of embodiment 1, voltage setting signal automatically increase with owing to being energized in public electrical path from the welding current of other the source of welding current and the suitable voltage value added of the voltage produced.Thus, due to setting voltage value added need not be carried out by experiment in advance, so Operational preparation high efficiency.Further, because voltage value added is automatically set to suitable value all the time, so stable welded condition can be maintained all the time.
Symbol description:
11 the 1st welding wires
12 the 2nd welding wires
2 workpiece
31 the 1st electric arcs
32 the 2nd electric arcs
41 the 1st welding torches
42 the 2nd welding torches
5 fixtures
61 the 1st feeder ears
62 the 2nd feeder ears
CD current electrifying judging circuit
Cd current electrifying judgment signal
DVR voltage value added initialization circuit
DVR2 the 2nd voltage value added initialization circuit
EV1 the 1st voltage error amplifying circuit
Ev1 the 1st voltage error amplifying signal
EV2 the 2nd voltage error amplifying circuit
Ev2 the 2nd voltage error amplifying signal
Fc1 the 1st feeding control signal
Fc2 the 2nd feeding control signal
FD1 the 1st feeding machine
FD2 the 2nd feeding machine
ID welding current testing circuit
Id welding current detection signal
Ig amounts to welding current
Ig (a) amounts to welding current mean value
IGD amounts to welding current testing circuit
Igd amounts to welding current detection signal
The electric current that Ip is fixing
Iw1 the 1st welding current
Iw1 (a) the 1st welding current mean value
Iw2 the 2nd welding current
Iw2 (a) the 2nd welding current mean value
PS1 the 1st source of welding current
PS2 the 2nd source of welding current
Rc1 the 1st cable resistance value
Rc2 the 2nd cable resistance value
Rg common electrical resistance
VCR Control of Voltage initialization circuit
Vcr Control of Voltage setting signal
VCR2 the 2nd Control of Voltage initialization circuit
VD1 the 1st voltage detecting circuit
Vd1 the 1st voltage detection signal
VD2 the 2nd voltage detecting circuit
Vd2 the 2nd voltage detection signal
Vo1 the 1st output voltage
Vo1 (a) the 1st output voltage average value
Vo2 the 2nd output voltage
VR1 the 1st voltage setting circuit
Vr1 the 1st voltage setting signal
VR2 the 2nd voltage setting circuit
Vr2 the 2nd voltage setting signal
Vw1 the 1st weldingvoltage
Vw1 (a) the 1st weldingvoltage mean value
Vw2 the 2nd weldingvoltage
Δ Vr voltage value added setting signal.
Claims (3)
1. the output control method of a source of welding current, produced electric arc respectively to weld to public workpiece by multiple source of welding current, at least 1 source of welding current in the above-mentioned source of welding current carries out output and controls, to make voltage detecting value equal with predetermined voltage setting value, the feature of the output control method of this source of welding current is
In above-mentioned voltage detecting value, the voltage produced from the resistance value of the public electrical path of the welding current of the above-mentioned source of welding current by energising and weldingvoltage are overlapped,
Above-mentioned voltage setting value is set as increasing voltage value added compared with when not being energized the above-mentioned welding current from other the above-mentioned source of welding current in above-mentioned public electrical path when being energized the above-mentioned welding current from other the above-mentioned source of welding current in above-mentioned public electrical path.
2. the output control method of the source of welding current according to claim 1, is characterized in that,
The value that above-mentioned voltage value added obtains after being redefined for and being multiplied with above-mentioned resistance value by the mean value of the aggregate values of the above-mentioned welding current from other above-mentioned source of welding current energising.
3. the output control method of the source of welding current according to claim 1, is characterized in that,
Detect the mean value of the aggregate values of the above-mentioned welding current of the above-mentioned source of welding current energising from other, the value obtained after above-mentioned voltage value added is automatically set to the above-mentioned mean value detected to be multiplied with above-mentioned resistance value.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2013138748A JP6154681B2 (en) | 2013-07-02 | 2013-07-02 | Output control method of welding power source |
| JP2013-138748 | 2013-07-02 |
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| EP3616822A1 (en) * | 2018-08-30 | 2020-03-04 | Fronius International GmbH | Method for determining an interfering coupling between welding current circuits of a welding installation |
| EP3616823A1 (en) * | 2018-08-30 | 2020-03-04 | Fronius International GmbH | Method for compensating for interference of a welding current from another welding current source |
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| US20040045942A1 (en) * | 2002-09-05 | 2004-03-11 | Norris Stephen W. | Plasma ARC torch system with pilot re-attach circuit and method |
| CN1496774A (en) * | 2002-09-26 | 2004-05-19 | 株式会社大亨 | Output control method of welding source device |
| CN101860072A (en) * | 2010-04-19 | 2010-10-13 | 成都康瑞特科技开发有限责任公司 | Multi-power parallel-combination welding power supply |
| CN102950366A (en) * | 2011-08-25 | 2013-03-06 | 株式会社大亨 | Welding set |
| CN102990201A (en) * | 2011-09-14 | 2013-03-27 | 株式会社大亨 | Welding device |
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| JPS5043029A (en) * | 1973-08-20 | 1975-04-18 | ||
| JPS5285040A (en) * | 1976-01-07 | 1977-07-15 | Nippon Steel Corp | Method of controlling multiielectrode welding voltage |
| JPS60170572A (en) * | 1984-02-10 | 1985-09-04 | Nippon Steel Corp | Multi-electrode welding method |
| JPH07115183A (en) | 1993-10-15 | 1995-05-02 | Olympus Optical Co Ltd | Layer-built solid-state image pickup device |
| JP4815966B2 (en) * | 2005-09-21 | 2011-11-16 | パナソニック株式会社 | Arc welding system |
| JP5099083B2 (en) * | 2009-06-22 | 2012-12-12 | Ｊｆｅエンジニアリング株式会社 | Control method and apparatus for multi-electrode welding apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040045942A1 (en) * | 2002-09-05 | 2004-03-11 | Norris Stephen W. | Plasma ARC torch system with pilot re-attach circuit and method |
| CN1496774A (en) * | 2002-09-26 | 2004-05-19 | 株式会社大亨 | Output control method of welding source device |
| CN101860072A (en) * | 2010-04-19 | 2010-10-13 | 成都康瑞特科技开发有限责任公司 | Multi-power parallel-combination welding power supply |
| CN102950366A (en) * | 2011-08-25 | 2013-03-06 | 株式会社大亨 | Welding set |
| CN102990201A (en) * | 2011-09-14 | 2013-03-27 | 株式会社大亨 | Welding device |
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| JP2015009271A (en) | 2015-01-19 |
| KR102140349B1 (en) | 2020-07-31 |
| KR20150004269A (en) | 2015-01-12 |
| CN104275540B (en) | 2017-09-15 |
| JP6154681B2 (en) | 2017-06-28 |
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