CN85100692A - The electric current amplitude modulation method and the device thereof of push-pull short circuit transition welding - Google Patents
The electric current amplitude modulation method and the device thereof of push-pull short circuit transition welding Download PDFInfo
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- CN85100692A CN85100692A CN 85100692 CN85100692A CN85100692A CN 85100692 A CN85100692 A CN 85100692A CN 85100692 CN85100692 CN 85100692 CN 85100692 A CN85100692 A CN 85100692A CN 85100692 A CN85100692 A CN 85100692A
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- amplitude modulation
- welding
- short circuit
- electric current
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Abstract
Be used for various electric arcs automatic and semi-automatic welding, particularly CO
2In the gas shielded arc welding.This method is utilized in the push-pull pulsed wire feeding arc burning and the cycle of droplet transfer to change and is actually these characteristics that determined by the wire feed phase place, according to the wire feed phase place welding current is carried out amplitude modulation.The more general continuous detection welding process parameter of this method, the amplitude modulation method equipment of reaction is simple, reliable for effect rapidly.Can greatly reduce and can not prolong short circuit duration in conjunction with short circuit current in the push-pull short circuit transition welding, the characteristics of deterioration welding process can make short circuit splash and greatly reduce.
Description
Be used for various electric arcs automatic and semi-automatic welding, particularly CO
2In the gas shielded arc welding.
CO
2In the short circuiting arc welding, reducing the most effective way of splashing is to reduce the electric current that short circuit begins moment and ending phase.The electric current that reduces beginning moment can prevent that electric current increases suddenly molten drop when touching the molten bath rigidly connecting, and blasts in the contact position and the whole ejection of molten drop, becomes and splash.The electric current that reduces ending phase can make liquid metal foot bridge that final stage connects welding wire and molten bath not reason heat too quickly and explode.In order to reach the purpose that accurately and timely changes electric current, generally all welding process is carried out continuous detection, by control system electric current is carried out amplitude modulation according to testing result.For example approach zero, illustrate and this moment short circuit has taken place, should reduce electric current immediately when arc voltage descends suddenly.Rise when short-circuit voltage falls gradually, reach suitable numerical value, illustrate that the liquid bridge between welding wire and molten bath has become very thin at this moment, resistance is bigger, also should reduce electric current immediately.This way that constantly detects reaction in time according to the process status parameter requires to have sensitive sensing element and executing agency fast, and equipment is complexity quite.However, because the irregularities of droplet transfer often still has the molten drop of quite a few to fail to be brought under control (1～4).
Pulsed wire feeding makes the droplet transfer become very regular.The control short circuit current can reduce splash (5) effectively in pulsed wire feeding.But when short circuit current reduces when too much, short circuit duration can excessively prolong, and the arc time shortens relatively, and the electric arc heated process worsens.
Push-pull pulsed wire feeding makes short circuit duration and the welding conditions renunciation that comprises short circuit current.By the welding wire forward-reverse motion accurately rapidly that wire-feed motor determined, short circuit current can be reduced to, and electric arc can also ignite again as long as foot bridge disconnects the back, and whether needn't consider to be generally the needed electromagnetic contractile force of the rapid transition of molten drop fully enough.
Consider that it also is that the wire feed phase place is determined that arc burning and the cycle of droplet transfer in the push-pull pulsed wire feeding process change that the cycle that is actually by wire feed changes, and being position of rotation by motor, the wire feed phase place determined, therefore state parameter that in this case can continuous detecting electric arc, and as long as according to the welding wire motion state, just the wire feed phase place is carried out electric current amplitude modulation and just can be accomplished to coordinate accurately and reliably with arc burning and droplet transfer.For example just reduce electric current soon, after welding wire has retreated suitable distance, just recover normal current, do with regard to one surely whole short circuit process all is included in the electric current amplitude modulation scope like this, avoided possibility out of control when welding wire begins to advance.
Purpose of the present invention promptly is to utilize the characteristics of push-pull pulsed wire feeding process according to the wire feed phase place welding current to be carried out degree of depth amplitude modulation, reaches to reduce the purpose that short circuit is splashed.The amplitude modulation method equipment that the more general continuous detection of this method is reacted rapidly is simple, reliable for effect.
Carry out electric current amplitude modulation according to the wire feed phase place two kinds of implementations can be arranged: a kind of is to obtain signal from the wire feeding motor axle, controls another executing agency with this signal, and the welding circuit electric current is changed.Another kind is by the device coaxial with motor, directly electric current is carried out amplitude modulation.The operation principle of these two kinds of modes is respectively as Fig. 1 and shown in Figure 3.
In Fig. 1, (1) is pulsating solder wire feeder, and (2) are welding wire, (3) electric arc, and (4) workpiece, (5) wire feeding motor, the other end of motor drive shaft are adorned a narrow meshed disk (6).When the light of lampet (7) enters in the photoelectric tube (8) by aperture, the electric pulse that is produced promptly turns on and off controllable silicon (9), make with controllable silicon parallel resistor R by short circuit or insert in the welding circuit, the electric current that power supply (10) is supplied with changes.
Fig. 2 is its oscillogram.Here only with two apertures, promptly two cover electro-optical systems work.Positive pulse disconnects controllable silicon, and resistance R inserts, and electric current reduces.Negative pulse is connected controllable silicon, the resistance R short circuit, and electric current increases.The selection of pulse generating time makes just in time and begins to overlap with the moment that finishes motion with welding wire among the figure.At t
1When welding wire had just begun to advance, positive pulse reduced arc current simultaneously.Because welding wire moves closer to the molten bath, arc voltage also reduces, and electric arc is by short circuit behind the certain hour excessively, and the molten drop liquid metal is poured into the molten bath.Welding wire retreats rapidly then, breaks away from molten drop, and electric arc ignites again, elongates.t
2The time welding wire retreated and finished, negative pulse produces, and makes electric current return to normal value.When the setting in motion again of welding wire next time, process repeats.
Increase little number of perforations, can obtain more pulse, can do thinner multistage amplitude modulation electric current.Select different aperture position, can change the phase place of pulse generation, promptly change priority length with respect to the amplitude modulation effect generation of short circuit process.Change the size of R, can change the size of amplitude modulation electric current, promptly obtain the different amplitude modulation degree of depth.
Among Fig. 3, (1) is pulsating solder wire feeder, (2) welding wire, and (3) electric arc, (4) workpiece, (5) wire feeding motor, the other end of motor drive shaft have a commutator (6), and 3 brushes (7 are arranged on the commutator
A, 7
B, 7
C).Commutator is made up of two halves, intermediate insulation.During the motor rotation, the insulating trip change in location changes the relation of connecting mutually between brush.As position shown in scheming to go up, brush 7
AWith 7
CConnect, with 7
BDisconnect, the electric current that power supply (8) is supplied with can directly flow to electric arc.Behind the insulating trip half-twist, brush 7
AWill be only with 7
BConnect, with 7
CDisconnect, resistance R inserts in the loop, and electric current reduces.Fig. 4 is its oscillogram, and principle is identical with Fig. 2.Increase brush and insulating trip number, change the position of insulating trip, change resistance R and all can produce and the same effect of preceding a kind of mode with respect to motor drive shaft.
List of references: 1, И С П И Н Ч y К " С В А Р О Ч Н О Е П Р О И З В " 76 № 1
2、И·С·ПИНЧУК《АВТОМАТ·СВАРКА》78·№·10
3、И·С·ПИНЧУК《СВАРОЧНОЕ ПРОИЗВ》80·№·6
4, Russian Patent 854639
5, the international welding in Hangzhou in 84 years such as Wang Qilong proceeding, XI-1.
Claims (1)
1, is used for various electric arcs automatic and semi-automatic welding, particularly CO
2The amplitude modulation method and the device thereof of gas shielded arc welding insert controllable silicon (9) in welding circuit, have resistance R in parallel with it.Change the reverse-blocking tetrode thyristor state according to the arc burning situation, can carry out amplitude modulation welding current.The feature of this method is: the amplitude modulation program is that just the wire feed phase place is determined by the position of rotation of the motor of pulsating solder wire feeder (1) (5) axle, and this amplitude modulation method realizes that by special amplitude modulation apparatus it is characterized in that: amplitude modulation apparatus is coaxial with wire feeding motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100692A CN85100692B (en) | 1985-04-01 | 1985-04-01 | Method and device of electric current amplitude modulation for push-pull short circuit transition weld |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100692A CN85100692B (en) | 1985-04-01 | 1985-04-01 | Method and device of electric current amplitude modulation for push-pull short circuit transition weld |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100692A true CN85100692A (en) | 1986-08-13 |
| CN85100692B CN85100692B (en) | 1987-03-11 |
Family
ID=4791365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100692A Expired CN85100692B (en) | 1985-04-01 | 1985-04-01 | Method and device of electric current amplitude modulation for push-pull short circuit transition weld |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100692B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032683A1 (en) * | 1996-03-05 | 1997-09-12 | Zheng Baoying | A control method for reducing spatter in co2 protective welding and pulsate wire feeder thereto |
| CN101474708B (en) * | 2008-01-02 | 2012-05-09 | 杭州凯尔达电焊机有限公司 | Method and system for realizing electric arc wire feeding for arc welding power source |
| CN102626814A (en) * | 2011-02-07 | 2012-08-08 | 株式会社大亨 | Welding device and carbon dioxide gas shielded arc welding method |
| CN108188544A (en) * | 2018-01-30 | 2018-06-22 | 苏州迈德焊接科技有限公司 | A kind of low spatter short circuit gas shield welding equipment |
| CN110625260A (en) * | 2019-09-25 | 2019-12-31 | 西南交通大学 | Laser-low current welding wire spontaneous induction electric arc hybrid welding system |
| CN113020753A (en) * | 2020-12-16 | 2021-06-25 | 中国石油大学(华东) | Novel double-cam push-pull wire electric arc additive manufacturing device |
-
1985
- 1985-04-01 CN CN85100692A patent/CN85100692B/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032683A1 (en) * | 1996-03-05 | 1997-09-12 | Zheng Baoying | A control method for reducing spatter in co2 protective welding and pulsate wire feeder thereto |
| CN101474708B (en) * | 2008-01-02 | 2012-05-09 | 杭州凯尔达电焊机有限公司 | Method and system for realizing electric arc wire feeding for arc welding power source |
| CN102626814A (en) * | 2011-02-07 | 2012-08-08 | 株式会社大亨 | Welding device and carbon dioxide gas shielded arc welding method |
| CN102626814B (en) * | 2011-02-07 | 2016-03-16 | 株式会社大亨 | Welder and carbon dioxide arc welding method |
| CN108188544A (en) * | 2018-01-30 | 2018-06-22 | 苏州迈德焊接科技有限公司 | A kind of low spatter short circuit gas shield welding equipment |
| CN110625260A (en) * | 2019-09-25 | 2019-12-31 | 西南交通大学 | Laser-low current welding wire spontaneous induction electric arc hybrid welding system |
| CN113020753A (en) * | 2020-12-16 | 2021-06-25 | 中国石油大学(华东) | Novel double-cam push-pull wire electric arc additive manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100692B (en) | 1987-03-11 |
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