CN102189314A - Arc welding control method of non-consumable electrode - Google Patents
Arc welding control method of non-consumable electrode Download PDFInfo
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- CN102189314A CN102189314A CN2011100608649A CN201110060864A CN102189314A CN 102189314 A CN102189314 A CN 102189314A CN 2011100608649 A CN2011100608649 A CN 2011100608649A CN 201110060864 A CN201110060864 A CN 201110060864A CN 102189314 A CN102189314 A CN 102189314A
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Abstract
The present invention provides an arc welding control method of a non-consumable electrode. In the arc welding of the non-consumable electrode, which is simultaneously performed when a filler wire is performed, even when welding torch height control of keeping the length of the arc to a certain length is performed, an insertion height of the filler wire can be always kept to a preset value. According to the arc welding control method of the non-consumable electrode, welding arc height control for restricting variation of an arc length (La), which is caused along with the consumption of a non-consumable electrode (1) in welding is performed. Furthermore a mounting component (51) is controlled for lifting along a longitudinal long shaft direction of the welding torque (4) through a mode which is characterized in that: the welding is performed simultaneously when the filler wire (5) is fed into a welding wire guiding device (52) which is mounted on the welding torque (4) through a mounting component (51), and an insertion height (Lh) of the filler wire (5) into an arc generation part is certain. Therefore, the variation of the insertion height of the filler wire (5) along with arc length control can be restrained, and an excellent welding quality can be obtained.
Description
Technical field
The non-melt electrode arc welding control method that welds when the present invention relates to carry out torch height control in the mode that electric arc reaches setting.
Background technology
As non-melt electrode arc welding, TIG welding (tungsten inert-gas welding connects), plasma-arc welding etc. are arranged.In the welding of non-melt electrode arc, electrode uses the non-melt electrode of tungsten electrode etc., makes under its state that covers from atmosphere at the protective gas by argon gas etc., electric arc takes place between non-melt electrode and mother metal weld.At this moment, through being everlasting feeding filler wire and welding when being inserted into the electric arc generating unit.In the following description, non-melt electrode is recited as electrode separately.
Fig. 3 is the summary pie graph of the welder of use during the non-melt electrode arc of feeding filler wire is welded.Below, with reference to this figure, each is constituted thing describe.
Source of welding current PS output is used to take place the welding current Iw and the weldingvoltage Vw of electric arc 3, and to welding torch elevating motor TM output welding torch lifting control signal Tc, to the feed motor FM of filler wire 5 output feeding control signal Fc.Because in non-melt electrode arc welding, use constant-current characteristics,, be controlled to be welding current Iw and reach setting so this source of welding current PS is the power supply of constant current control.Front end at welding torch 4 is equipped with nozzle 41, and from this inboard ejection protective gas (omitting diagram).In addition, electrode 1 is installed, installs with state from the outstanding number of the front end mm of nozzle 41 at the front end of welding torch 4.Electric arc 3 has taken place between electrode 1 and mother metal 2.
Via installation component 51 wire guide 52 is installed on the welding torch 4.By feed motor FM feeding filler wire 5 in wire guide 52, to be inserted into the electric arc generating unit.Feed motor FM controls feed speed by the feeding control signal Fc from above-mentioned source of welding current PS.
Welding torch elevating mechanism 6 is the mechanisms that are used for along above-below direction lifting welding torch 4.Welding torch elevating motor TM is the motor that is used for along above-below direction lifting welding torch 4.This welding torch elevating motor TM such as above-mentioned, the welding torch lifting control signal Tc by from source of welding current PS controls lifting direction and lifting distance.Though omitted diagram, mother metal 2 is arranged on the automatic chassis, and automatic chassis moves with the speed of welding of predesignating in welding process.
In the figure, the distance between the front end of electrode 1 and the mother metal 2 is the long La of electric arc.And, the intersection point between the chain-dotted line y2 of the chain-dotted line y1 of the direction of feed of expression filler wire 5 and binding front end of electrode 1 and mother metal 2 is made as P.With the distance definition between this intersection point P and the mother metal 2 is the insertion height Lh of filler wire 5.In order to obtain good welding quality, the insertion height Lh of long La of electric arc in the welding and filler wire need be set at appropriate value.
In non-melt electrode arc welding, electric arc length is the distance between the front end of electrode 1 and the mother metal 2.Therefore, before welding beginning, adjust, make welding torch elevating motor TM action in the mode that the front end and the distance between the mother metal 2 of this electrode 1 is appropriate value.Main cause as the long La of electric arc in welding changes mainly contains two situations.Be that the apparent height of mother metal 2 changes as first situation.Because when the apparent height of mother metal 2 changes with electrode 1 between variable in distance, so the long La variation of electric arc.As the 2nd situation be, the front end consumption by electric arc 3 electrodes 1 shortens, and causes the long La of electric arc to change.Advancing of the consumption of electrode 1, because of the waveform (exchanging or direct current) of the material of electrode 1, diameter, welding current value, welding current, the frequency that electric arc starts etc. different.Especially, under the situation of energising alternating current, this consumption is advanced apace when electrode straight polarity.Carried out in the past and be used to suppress the variation of the long La of this electric arc and it is maintained the torch height control method (for example, with reference to patent documentation 1) of certain value.In the torch height control method of the prior art, the illumination by weldingvoltage Vw or arclight detects the long La of electric arc, becomes and sets value the mode that equates and control welding torch elevating motor TM with this detected value.
On the other hand, about the highly adjustment of Lh of insertion of filler wire 5, various guiding mechanisms (for example, with reference to patent documentation 2) had been used in the past.By the guiding mechanism of patent documentation 2 grades records is set, before the welding beginning on one's own initiative with the direction of insertion of filler wire 5 and insert height Lh and be adjusted into appropriate state.
Patent documentation
[patent documentation 1] TOHKEMY 2002-239728 communique
[patent documentation 2] TOHKEMY 2009-107003 communique
As above-mentioned, by carrying out torch height control, the variation that the electric arc in can suppressing to weld is long.At this moment, be under the mother metal apparent height situation about changing in the 1st main cause that electric arc length changes, be that certain mode is carried out torch height control with the distance between the surface of the front end of welding torch and mother metal.For this reason, the insertion of long La of electric arc and filler wire height Lh keeps appropriate value, and can obtain good welding quality.
On the other hand, be that electrode consumes and under the situation that front end shortens in long the 2nd main cause that changes of electric arc, the distance that is controlled to be by torch height between the surface of the front end of welding torch and mother metal shortens.Its result, the distance between electrode front end and the mother metal surface are that the long La of electric arc can keep certain value.But, because the torch height step-down, so the insertion of filler wire height Lh step-down.Do not have to have nothing to do with the long La of electric arc with the certain value variation, because the insertion of filler wire height Lh variation, so the situation of generation welding quality variation.The reason that the insertion of filler wire height Lh changes is, as described in Figure 3 because wire guide 52 combines with welding torch 4 via installation component 51, thus when torch height changes the insertion of filler wire highly Lh also change.
Summary of the invention
Therefore, the objective of the invention is to, the long variation of electric arc that provides a kind of consumption that can suppress because of electrode to cause, and can suppress the non-melt electrode arc welding control method of variation of the insertion height of filler wire.
In order to solve above-mentioned problem, a kind of non-melt electrode arc welding control method of the invention of technical scheme 1, the consumption that execution is used for suppressing being accompanied by the non-melt electrode of welding causes the torch height control of the long variation of electric arc, and by being installed in via installation component in the wire guide on the welding torch, weld in the time of the feeding filler wire, this non-melt electrode arc welding control method is characterised in that, the insertion of inserting to the electric arc generating unit with described filler wire highly is certain mode, along the fore and aft axis direction of described welding torch described installation component is carried out lifting control.
The invention of technical scheme 2, it is technical scheme 1 described non-melt electrode arc welding control method, it is characterized in that, described torch height control is according to each control cycle of predesignating, difference Δ V based on the detected value Vd of voltage setting value Vr that predesignates and weldingvoltage comes computed correction Δ h, make torch height change the control of this correction amount h
The lifting of described installation component control is to make the reversed control of the counter-rotating correction-Δ h behind the symbol of described correction amount h of described installation component lifting.
[invention effect]
According to the present invention, control by torch height and to suppress the long variation of electric arc that the consumption because of non-melt electrode causes, and highly control by the insertion of carrying out filler wire, can insertion electric arc is long and filler wire maintain appropriate value highly all the time.Therefore, can obtain good welding quality.
Description of drawings
Fig. 1 is the signal pie graph that is used to implement the welder of the related non-melt electrode arc welding control method of embodiments of the present invention.
Fig. 2 is the detailed diagram of the source of welding current PS of pie graph 1.
Fig. 3 is the signal pie graph of the non-melt electrode arc welder of prior art.
[symbol description]
1-(non-melt) electrode; The 2-mother metal; 3-electric arc; The 4-welding torch; The 41-nozzle; The 5-filler wire; The 51-installation component; The 52-wire guide; 6-welding torch elevating mechanism; 71-installation component elevating mechanism; DB-decline button; The Db-dropping signal; DH-correction counting circuit; EI-current error amplifying circuit; Ei-current error amplifying signal; FC-feed motor control circuit; Fc-feeding control signal; The FM-feed motor; FR-feed speed initialization circuit; Fr-feed speed setting signal; HC-installation component lifting control circuit; Hc-installation component lifting control signal; HM-installation component elevating motor; The ID-current detection circuit; The Id-current detection signal; The IR-current setting circuit; Ir-current settings signal; The Iw-welding current; The K-magnifying power; La-electric arc is long; The Lh-filler wire inserts height; The P-intersection point; The PM-electric power main circuit; The PS-source of welding current; TC-welding torch lifting control circuit; Tc-welding torch lifting control signal; TM-welding torch elevating motor; UB-rising button; The Ub-rising signals; The VD-voltage detecting circuit; The Vd-voltage detection signal; The VR-voltage setting circuit; Vr-voltage is set (signal/value); The Vw-weldingvoltage; Y1-filler wire direction of feed; Y2-electrode longitudinally; Δ h-correction (signal); Δ V-voltage setting signal and voltage detection signal poor.
The specific embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the signal pie graph that is used to implement the welder of the related non-melt electrode arc welding control method of embodiments of the present invention.In the figure, give prosign to the formation thing identical, and omit these explanations with above-mentioned Fig. 3.This figure is the schematic diagram that has appended installation component elevating mechanism 71 and installation component elevating motor HM in Fig. 3.Below, with reference to this figure these parts are described.
Installation component elevating mechanism 71 is the mechanisms that are used for along the fore and aft axis direction lifting installation component 51 of welding torch 4.
Installation portion elevating mechanism 71 is to be made of the ball screw of installing abreast along the fore and aft axis direction of welding torch 4 and the part of sliding abreast along the fore and aft axis direction of welding torch by the rotation of ball screw, and in the part of sliding installation component 51 has been installed, and has been made installation component with the mechanism of lift in height arbitrarily by the swing roller screw rod.
Fig. 2 is the detailed diagram of the source of welding current PS of expression pie graph 1.Below, with reference to this figure, each piece is described.
Electric power main circuit PM as input, according to the output control that current error amplifying signal Ei described later carries out inverter control etc., exports welding current Iw with the source power supply (omitting diagram) of 3 phase 200V etc.This welding current Iw switches on by welding torch 4, electrode 1, electric arc 3 and mother metal 2, applies weldingvoltage Vw between welding torch 4 and mother metal 2.
The current settings signal Ir that current setting circuit IR output is predesignated.Current detection circuit ID detects above-mentioned welding current Iw, and output current detection signal Id.Error between current settings signal Ir that current error amplifying circuit EI amplification is above-mentioned and the above-mentioned current detection signal Id, and output current error amplification signal Ei.Control by the output of carrying out the source of welding current according to this current error amplifying signal Ei and to carry out constant current control, switch on the welding current Iw of desired value.
Voltage detecting circuit VD detects above-mentioned weldingvoltage Vw, and voltage sense signal Vd.Voltage setting circuit VR output and the long corresponding voltage setting signal Vr of the electric arc of regulation.Correction counting circuit DH with above-mentioned voltage setting signal Vr and above-mentioned voltage detection signal Vd as input, according to each control cycle of predesignating, the magnifying power K that on the difference of the value of the value of voltage setting signal Vr and voltage detection signal Vd, multiplies each other and predesignate, and output correction signal delta h=K (Vr-Vd).At this, control cycle is the cycle that is used for the welding torch elevating motor TM and the installation component elevating motor HM of control chart 1, and the response speed that needs only with respect to these motor is the fully short time, for example is set at about 0.1～10ms.Because magnifying power K sets the gain of reponse system, so be configured to the stable value of reponse system.At this, example be used as conventional techniques P control the situation of computed correction signal delta h, but similarly, also can calculate based on PI control and PID control as conventional techniques.
The feed speed setting signal Fr that feed speed initialization circuit FR output is predesignated.Feed motor control circuit FC outputs to feed motor FM with feeding control signal Fc, and this feeding control signal Fc is used for the value feeding filler wire 5 with above-mentioned feed speed setting signal Fr.Feed motor FM is according to above-mentioned feeding control signal Fc control rotating speed.
When rising button UB was pressed, output became the rising signals Ub of height (High) level.When decline button DB was pressed, output became the dropping signal Db of high level.Welding torch lifting control circuit TC with above-mentioned correction signal delta h, above-mentioned rising signals Ub and above-mentioned dropping signal Db as input, and when rising signals Ub is high level, output promotes the welding torch lifting control signal Tc of the height of welding torch with the low velocity of predesignating, when dropping signal Db is high level, the welding torch lifting control signal Tc that output reduces the height of welding torch with above-mentioned low velocity, in welding, according to each above-mentioned control cycle, the height of output welding torch only changes the welding torch lifting control signal Tc of the value of correction signal delta h.Welding torch elevating motor TM controls its direction of rotation and rotating speed according to above-mentioned welding torch lifting control signal Tc.When above-mentioned correction signal delta h is positive value, the height rising Δ h of control welding torch, at above-mentioned correction signal delta h during for negative value, the absolute value of the height decline Δ h of control welding torch.Because the height of welding torch becomes the long La of electric arc, so the height of control welding torch and the long La equivalence of control electric arc.Before beginning welding, press rising button UB or decline button DB, the mode that becomes setting with the height of welding torch is adjusted, and begins welding then.
Installation component lifting control circuit HC with above-mentioned correction signal delta h as input, in welding, according to each above-mentioned control cycle, output installation component lifting control signal Hc, this lifting control signal Hc make reversed value behind the symbol of correction signal delta h of the Level Change of installation component.Installation component elevating motor HM controls its direction of rotation and rotating speed according to above-mentioned installation component lifting control signal Hc.When above-mentioned correction signal delta h is positive value, control the height decline Δ h that makes installation component, during for negative value, control the absolute value of the height rising Δ h that makes installation component at above-mentioned correction signal delta h.Because the insertion height Lh of the height of installation component decision filler wire, so the height of control installation component and the insertion height Lh equivalence of controlling filler wire.Before beginning welding, so that the height of installation component is in the reference position, begin welding then by manually adjusting.
Utilize numerical example, the control of the insertion of long La of electric arc and filler wire height Lh is described.In n the control cycle in welding, establish voltage detection signal Vd=20.2V, voltage setting signal Vr=20.0V.Promptly, there is consumption of electrode and causes the long La of electric arc to become than the situation of setting length.The correction signal delta h=2 of this moment * (20.0-20.2)=-0.4mm.At this, establish magnifying power K=2.According to this correction signal delta h, the height of the welding torch 0.4mm that in this n control cycle, descends, the long La of the electric arc 0.4mm that shortens, thereby near setting.Simultaneously, the height of installation component rising 0.4mm and offset the rising part of welding torch in this n control cycle so the insertion of filler wire height Lh is Lh-0.4+0.4=Lh, thereby is directly keeping with setting.At this, though establish magnifying power K=2,, also can consider the stability of the insertion height control system of torch height control system and filler wire as above-mentioned, set.
As above-mentioned, about the long main cause that changes of electric arc in welding, in first main cause the variation of the apparent height of mother metal, in the 2nd, be the consumption of electrode.The variation of the apparent height of mother metal can be confirmed before beginning welding.By confirm and under the vicissitudinous situation of the apparent height of mother metal, inapplicable the present invention.Promptly, only carry out torch height control, the action that the insertion of filler wire is highly controlled stops.On the other hand, under the unconverted situation of the apparent height of mother metal, carry out the insertion of torch height control and filler wire simultaneously and highly control.
According to above-mentioned embodiment, can suppress to cause the variation that electric arc is long by torch height control, and highly control and insertion electric arc is long and filler wire to maintain appropriate value highly all the time by the insertion of carrying out filler wire because of the consumption of non-melt electrode.Therefore, can obtain good welding quality.Especially, in the consumption of electrode strong AC-TIG WELDING welding and AC plasma arc welding, the effect that the present embodiment performance is bigger.
In the above-described embodiment, though illustration the situation of automatic soldering device, allow situation that robot controls the robot welding device that welding torch welds too.In this case, be that voltage setting circuit VR, voltage detecting circuit VD, correction counting circuit DH, welding torch lifting control circuit TC and installation component lifting control circuit HC are built in the manipulator controller with the module relevant with torch height control shown in Figure 2.In addition, because carry out the height control of welding torch, so do not need welding torch elevating motor TM by each of robot.Installation component elevating motor HM is set at the wrist axis of manipulator.The teaching machine of using by teaching (teach pendant) carries out and rising button UB and the same operation of decline button DB.By from the welding torch lifting control signal Tc of welding torch lifting control circuit TC control robot each and the height of welding torch changes.
Claims (2)
1. non-melt electrode arc welding control method, execution is used for suppressing being accompanied by the consumption of non-melt electrode of welding and the torch height control of the long variation of the electric arc that causes, and by being installed in via installation component in the wire guide on the welding torch, in the feeding filler wire, weld, this non-melt electrode arc welding control method is characterised in that
The insertion of inserting to the electric arc generating unit according to described filler wire highly is certain mode, along the fore and aft axis direction of described welding torch described installation component is carried out lifting control.
2. non-melt electrode arc welding control method according to claim 1 is characterized in that,
Described torch height control is according to each control cycle of predesignating, poor (Δ V) based on the detected value (Vd) of voltage setting value of predesignating (Vr) and weldingvoltage comes computed correction (Δ h), make torch height change the control of this correction (Δ h)
The lifting control of described installation component is the control that makes described installation component lifting counter-rotating correction (Δ h), and this counter-rotating correction (Δ h) makes the sign-inverted of described correction (Δ h).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-059375 | 2010-03-16 | ||
| JP2010059375A JP2011189396A (en) | 2010-03-16 | 2010-03-16 | Non-consumable electrode arc welding control method |
Publications (2)
| Publication Number | Publication Date |
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| CN102189314A true CN102189314A (en) | 2011-09-21 |
| CN102189314B CN102189314B (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110060864.9A Expired - Fee Related CN102189314B (en) | 2010-03-16 | 2011-03-10 | Arc welding control method of non-consumable electrode |
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| JP (1) | JP2011189396A (en) |
| CN (1) | CN102189314B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104209631A (en) * | 2014-09-02 | 2014-12-17 | 招商局重工（江苏）有限公司 | Electrical arc welding control device of consumable electrode |
| CN111168196A (en) * | 2020-01-07 | 2020-05-19 | 北京博清科技有限公司 | Control method for crawling welding robot, robot and storage medium |
| CN111451604A (en) * | 2020-04-10 | 2020-07-28 | 西安交通大学 | Repair welding monitoring feedback method and system for GTAW arc fuse material additive manufacturing arc blowout part |
| CN112388111A (en) * | 2020-12-02 | 2021-02-23 | 唐山松下产业机器有限公司 | TIG welding wire control method, TIG welding wire control system, TIG welding wire control device, and TIG welding wire control medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101855686B1 (en) * | 2012-03-29 | 2018-05-08 | 다이요 닛산 가부시키가이샤 | Semiautomatic welding system, conversion adapter kit, and welding torch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111451604A (en) * | 2020-04-10 | 2020-07-28 | 西安交通大学 | Repair welding monitoring feedback method and system for GTAW arc fuse material additive manufacturing arc blowout part |
| CN111451604B (en) * | 2020-04-10 | 2021-07-13 | 西安交通大学 | Repair welding monitoring feedback method and system for GTAW arc fuse material additive manufacturing arc blowout part |
| CN112388111A (en) * | 2020-12-02 | 2021-02-23 | 唐山松下产业机器有限公司 | TIG welding wire control method, TIG welding wire control system, TIG welding wire control device, and TIG welding wire control medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102189314B (en) | 2015-05-20 |
| JP2011189396A (en) | 2011-09-29 |
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