CN103521885A - Welding method with indirect arc between double welding wires alternately changed to form by-pass arc - Google Patents
Welding method with indirect arc between double welding wires alternately changed to form by-pass arc Download PDFInfo
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- CN103521885A CN103521885A CN201310456520.9A CN201310456520A CN103521885A CN 103521885 A CN103521885 A CN 103521885A CN 201310456520 A CN201310456520 A CN 201310456520A CN 103521885 A CN103521885 A CN 103521885A
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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
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
- B23K9/1735—Arc welding or cutting making use of shielding gas and of a consumable electrode making use of several electrodes
Abstract
The invention relates to a welding method with an indirect arc between double welding wires alternately changed to form a by-pass arc, and belongs to the technical field of the welding. The method breaks through the limit of traditional arc welding method, deposition amount is increased while welding heat input is reduced, and the deposition amount and the hot input can be adjusted respectively. The two welding wires are fed through two wire feeders at a certain included angle and are located above a workpiece, and the two welding wires are connected with two electrodes of an AC welding power source to establish the indirect arc; a change-over switch is connected with the positive electrode of a DC welding power source, the other two ends of the change-over switch are connected with the two welding wires respectively, the negative electrode of the DC welding power source is connected with the workpiece, a main arc is sequentially and alternately established between the two welding wires and the workpiece welded through the change-over switch, the change-over switch alternately works in a change-over mode to adjust the direction of the currents of the welding wires, the change-over frequency of the change-over switch and the output frequency of the AC welding power source are consistent, meanwhile, it is guaranteed that the flow directions of the currents on the same welding wire for the two welding power sources are same, the indirect arc is changed alternately to form the by-pass arc, and the indirect arc and the main arc work jointly for completing welding.
Description
Technical field
The present invention relates to the welding method that a kind of twin-wire indirect arc replaces bypass, is a kind of multi-electrode coupled arc welding method, belongs to welding technology field.
Background technology
In modern processing manufacturing industry and industrial processes, solder technology has become a kind of important processing technology.Along with the application of new material, solder technology to be had higher requirement, modern welding technology, to efficient, high-quality, low consumption future development, has proposed more and more higher requirement to the productivity ratio of welding method and hot input control.The main path of high efficiency welding: the one, improve speed of welding; The 2nd, improve deposition rate, but the raising of this two aspect finally to be summed up as the significantly raising of welding current.In traditional welding procedure, there is intrinsic limitation in welding wire deposition rate and heat input, and welding wire deposition rate and heat input can not decoupling zeros, along with the increase of welding current will inevitably increase the heat input of welding, causes the decline of welding quality.Improve welding production efficiency and welding quality, reduce heat input and reduce the study hotspot that defect is modern welding circle.
Released in recent years a large amount of new welding process, for example: Tandem weldering, CMT weldering, multifibres weldering in parallel, Cold arc weldering etc., although sweating heat input and welding efficiency are improved, but still fundamentally do not change traditional arc mode: an energy part for electric arc is used for the filler wire formation droplet transfer to workpiece, a part produces a lot of heats on workpiece, but workpiece quantity of heat production is much larger than the heat for filler wire, the heat production of workpiece just becomes a kind of waste of energy, and this energy has increased the variation of material property.The welding current of the welding procedure that these are novel reduces to make welding arc unstable, and process control difficulty increases, and welding equipment cost increases.
Existing welding arc pattern can not thoroughly change intrinsic energy distribution, Kentucky, United States university opens abundant penetrating judgment and awards and released By-pass and two kinds of NEW TYPE OF COMPOSITE welding methods of Arcing-wire, the common welding of having worked of two electric arcs of GTAW and GMAW, this welding method is broken the intrinsic collocation of original welding arc, realizes heat input and the deposited separate regulation of metal.But to connect positive pole (DCEP) arc stability of power supply output good for the welding wire of GMAW in above-mentioned two kinds of welding methods, wire melting and droplet transfer are even, but welding wire melting rate is relatively low.And when welding wire connects the negative pole (DCEN) of power supply output, weld penetration is shallow, it is high that the relative DCEP of welding wire heat production wants, and the deposition rate of welding wire is fast, and its burn-off rate is 1.5 times of DCEP.In existing welding procedure, be mostly to adopt the connection of DCEP, only having methods such as exchanging MIG and CMTADVANCED is can make full use of advantage that electric arc negative pole (DCEN) quantity of heat production is many to melt more welding wire and complete welding process, but welding equipment cost is very high.
Patent of the present invention is a kind of deposition rate that increases welding wire, can improve the novel consumable electrode welding method of energy utilization efficiency simultaneously, realizes the free adjustment of the input of welding process heat and deposition rate.
Summary of the invention
The object of the invention is to overcome and in existing arc mode, improve welding wire deposition rate and reduce the contradictory relation of heat input between the two, propose a kind of welding method that increases welding deposition rate and reduce arc heat input.
In the present invention, adopt the direct current source of welding current to be connected between welding wire and workpiece and set up main arc, AC welding power source is set up an indirect arc between two root wires, main arc alternately appears between two root wires and workpiece, main arc heats welding wire and workpiece on the one hand, control heat input, improve on the other hand droplet transfer ability, indirect arc effect is filler wire, can regulate separately deposition rate.
To achieve these goals, the present invention has taked following technical scheme: two identical root wires are sent to respectively by two wire-feed motor with the angle of 30-60 °, two root wires are positioned at the top of welded piece, two electrodes of AC welding power source are connected with the ignition tip of two root wires respectively, and set up indirect arc between two root wires, utilize the energy of indirect arc to melt the welding wire of sending to, the direct current source of welding current is anodal to be connected with reversing switch, the another two ends of reversing switch are connected with two root wires respectively, direct current source of welding current negative pole connects welded piece, by reversing switch, make alternately to set up successively between two welding wires and welded piece main arc, reversing switch replaces commutation work and adjusts the sense of current on welding wire, the commutating frequency of reversing switch wants consistent with the output current frequency of AC welding power source, and the current direction on same welding wire is identical simultaneously with AC welding power source to guarantee the direct current source of welding current.Specifically, referring to Fig. 1,2 and 3, when reversing switch makes, welding wire I and the direct current source of welding current are anodal to be connected, and the direct current source of welding current, welding wire I, workpiece form current loop, produce electric arc I, the positive pole of AC welding power source connects welding wire I, and negative pole connects welding wire II, between two root wires, forms indirect arc.When reversing switch makes, welding wire II and the direct current source of welding current are anodal to be connected, the direct current source of welding current, welding wire II, workpiece form current loop, produce electric arc II, and the positive pole of AC welding power source connects welding wire II, negative pole connects welding wire I, between two root wires, forms indirect arc.The alternately commutation of main arc wants consistent with the frequency of AC welding power source.The common welding of having worked of main arc and indirect arc.The energy of two electric arcs can regulate separately, has realized the separate regulation of welding wire deposition rate and the input of workpiece heat.Utilize the energy of indirect arc to melt the welding wire of sending to, by regulating the electric current of indirect arc and the feed rate of welding wire to complete the adjusting of the deposition rate of welding wire; Main arc not only can be controlled sweating heat input, and the plasma jet that can also increase welding wire is simultaneously made every effort to promote makes the droplet transfer in molten bath.Reversing switch replaces commutation work and adjusts the sense of current on welding wire, guarantees that two root wire deposition rates are suitable.
Advantage of the present invention is as follows:
It is exactly break traditions electric arc deposited speed and the intrinsic collocation of heat input that welding method of the present invention is different from the most significant feature of conventional arc welding method, realize the heat input separate regulation of welding wire deposition rate and welding arc, can adjust flexibly heat transfer and mass transfer in welding process, this is an invention that existing welding technology is reformed, and the method can utilize some existing equipment to carry out high efficiency, high-quality and economic thin plate and cut deal welding.
Accompanying drawing explanation:
Fig. 1 operation principle schematic diagram of the present invention;
Fig. 2 welding wire I and electric arc I work schematic diagram;
Fig. 3 welding wire II and electric arc II work schematic diagram;
Fig. 4 current waveform sequential chart;
In figure, 1 is the direct current source of welding current, and 2 is AC welding power source, and 3 is welded piece, and 4 is reversing switch, and 5 is welding wire I, and 6 is welding wire II, and 7 is indirect arc, and 8 is electric arc I, and 9 is electric arc II, and 10 and 11 are respectively two wire-feed motor.
The specific embodiment:
Below specifically describing embodiments of the present invention, is illustrative in accompanying drawing, and the connected mode of this welding method about aspect, electric loop has only been described, the necessary gas circuit of welding gun and water route connection are all to use conventional connection, so no longer describe.
Below the step of this welding method is elaborated: Fig. 1 is shown in by operation principle schematic diagram of the present invention; Fig. 2 is shown in by welding wire I and electric arc I work schematic diagram; Fig. 3 is shown in by welding wire II and electric arc II work schematic diagram; The overlaying relation of the electric current of the electric current of the direct current source of welding current 1 and AC welding power source 2 in welding wire I and welding wire II is shown in Fig. 4.
(1) welding wire I and welding wire II are respectively by two wire-feed motor automatic feed at a certain angle, and welding wire I is connected with two outputs of AC welding power source respectively with welding wire II; Welding wire I is connected with the output cathode of the direct current source of welding current with welding wire II simultaneously, between welding wire and direct current source of welding current output cathode, is connected with reversing switch, and reversing switch is controlled two root wires and the anodal conducting of the direct current source of welding current.The direct current source of welding current is the adjustable constant current of amplitude or constant voltage source.
(2) between welding wire I and welding wire II, produce indirect arc (side-arcing), welding process indirect electric arc (side-arcing) exists all the time.Indirect arc (side-arcing) heat mainly carrys out filler wire, and the time of AC welding power source positive-negative half-cycle and amplitude be adjustable constant current or constant voltage source all.(3) during the anodal conducting of welding wire I and the direct current source of welding current, form electric arc I between welding wire I and workpiece, between welding wire I and welding wire II, produce indirect arc, electric arc I is considered as main arc, and the indirect arc between welding wire II and welding wire I is considered as side-arcing.
(4) during the anodal conducting of welding wire II and the direct current source of welding current, form electric arc II between welding wire II and workpiece, between welding wire I and welding wire II, produce indirect arc, electric arc II is considered as main arc, and the indirect arc between welding wire I and welding wire II is considered as side-arcing.
(5) above-mentioned two processes hocket, and main arc and indirect arc are jointly worked and realized welding.The output frequency of reversing switch turn-on frequency and AC welding power source is consistent, guarantees that the direction of welding current on welding wire is consistent simultaneously.
(6) in the current waveform sequential chart of Fig. 4, welding wire I is considered as to the electric current sequential chart in anodal situation, I in figure
1for the electric current output waveform of the direct current source of welding current 1, I
2for the electric current output waveform of AC welding power source 2, I
3and I
4the current waveform figure of welding wire I and welding wire II while being respectively normal operation.
(7), during the anodal conducting of welding wire I and the direct current source of welding current, the electric current that flows into welding wire I is I
3(I
1+ I
2), the electric current of indirect arc is I
2, the electric current of electric arc I is I
1.Under this working method, the energy of welding wire I fusing comes from electric arc I and indirect arc, and electric arc I increases the droplet transfer ability of welding wire I simultaneously.In this state, welding wire II is in DCEN state in indirect arc, and welding wire melting rate is fast, and indirect arc is only that welding wire II is carried out to heat fused, does not have the droplet transfer, and the welding wire II of fusing is that next process is prepared.
(8), during the anodal conducting of welding wire II and the direct current source of welding current, the electric current that flows into welding wire II is I
4(I
1+ I
2), the electric current of indirect arc is I
2, the electric current of electric arc II is I
1.Under this working method, the energy of welding wire II fusing comes from electric arc II and indirect arc, and electric arc II increases the droplet transfer ability of welding wire II simultaneously.In this state, welding wire I is in DCEN state in indirect arc, and welding wire melting rate is fast, and indirect arc is only that welding wire II is carried out to heat fused, does not have the droplet transfer, and the welding wire I of fusing is that next process is prepared.
(9) reversing switch 4 is controlled the current lead-through order of two root wires, electric arc I and electric arc II mutual conduction, and two electric arcs do not interfere with each other.
Claims (3)
1. twin-wire indirect arc replaces the welding method of bypass, it is characterized in that, comprise the following steps: two identical root wires are sent to respectively by two wire-feed motor with the angle of 30-60 °, two root wires are positioned at the top of welded piece, two electrodes of AC welding power source are connected with the ignition tip of two root wires respectively, and set up indirect arc between two root wires, utilize the energy of indirect arc to melt the welding wire of sending to; The direct current source of welding current is anodal to be connected with reversing switch, the another two ends of reversing switch are connected with two root wires respectively, direct current source of welding current negative pole connects welded piece, by reversing switch, make alternately to set up successively between two welding wires and welded piece main arc, reversing switch replaces commutation work and adjusts the sense of current on welding wire, the commutating frequency of reversing switch wants consistent with the output current frequency of AC welding power source, and the current direction on same welding wire is identical simultaneously with AC welding power source to guarantee the direct current source of welding current.
2. according to the method for claim 1, it is characterized in that, the commutating frequency of reversing switch wants consistent with the output current frequency of AC welding power source, the current direction on same welding wire is identical simultaneously with AC welding power source to guarantee the direct current source of welding current, be: when reversing switch makes, welding wire I and the direct current source of welding current are anodal to be connected, the direct current source of welding current, welding wire I, workpiece form current loop, produce electric arc I, the positive pole of AC welding power source connects welding wire I, negative pole connects welding wire II, between two root wires, forms indirect arc; When reversing switch makes, welding wire II and the direct current source of welding current are anodal to be connected, the direct current source of welding current, welding wire II, workpiece form current loop, produce electric arc II, and the positive pole of AC welding power source connects welding wire II, negative pole connects welding wire I, between two root wires, forms indirect arc; The alternately commutation of main arc wants consistent with the frequency of AC welding power source, the common welding of having worked of main arc and indirect arc.
3. according to the method for claim 1, it is characterized in that, by regulating the electric current of indirect arc and the feed rate of welding wire to complete the adjusting of the deposition rate of welding wire, main arc is controlled sweating heat input, and the plasma jet that simultaneously increases welding wire is made every effort to promote makes the droplet transfer in molten bath; Reversing switch replaces commutation work and adjusts the sense of current on welding wire, guarantees that two root wire deposition rates are suitable.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057182A (en) * | 2014-04-17 | 2014-09-24 | 深圳市瑞凌实业股份有限公司 | Power supply device for realizing double-wire three-arc welding |
| CN104117757A (en) * | 2014-08-06 | 2014-10-29 | 山东大学 | Efficient low heat input and double-wire surfacing method |
| CN105562897A (en) * | 2016-03-11 | 2016-05-11 | 兰州理工大学 | Twin-wire bypass coupled arc efficient metal-inert gas (MIG) welding system |
| CN106513924A (en) * | 2016-11-11 | 2017-03-22 | 深圳市瑞凌实业股份有限公司 | Double-wire electric arc welding method and device |
| CN106914708A (en) * | 2017-02-27 | 2017-07-04 | 北京工业大学 | Laser twin-wire indirect arc composite welding apparatus and wire feed rate prediction computational methods |
| CN108176915A (en) * | 2017-12-08 | 2018-06-19 | 深圳市瑞凌实业股份有限公司 | The striking control method of polymorphic double wire welding device and polymorphic double wire welding device |
| CN108500266A (en) * | 2018-04-19 | 2018-09-07 | 河北科技大学 | 7000 line aluminium alloy increasing material manufacturing method and system |
| CN110919017A (en) * | 2019-12-20 | 2020-03-27 | 北京工业大学 | Method and device for preparing spherical metal powder by hot wire assisted plasma arc |
| CN112139630A (en) * | 2019-06-28 | 2020-12-29 | 南京理工大学 | Method and device for electric arc additive manufacturing of consumable electrode with adjustable heat input |
| CN114247966A (en) * | 2021-12-16 | 2022-03-29 | 北京工业大学 | Dual-wire dissimilar material welding and additive method based on variable polarity power supply |
| CN114247962A (en) * | 2021-12-16 | 2022-03-29 | 北京工业大学 | Multi-electrode time-sharing conduction and polarity-changing alternating arc welding and material adding method |
| CN114700643A (en) * | 2022-05-06 | 2022-07-05 | 盐城工学院 | High-deposition low-heat-input plasma-twin-wire bypass arc welding device and method |
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Non-Patent Citations (1)
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| 耿正，邱光，王巍，韩雪飞，汪清华: "动态三电弧双丝电弧焊接方法的研究一种新型双丝电弧焊接方法", 《先进的汽车及轨道交通焊接论坛论文集》, 1 September 2013 (2013-09-01), pages 10 - 13 * |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104057182A (en) * | 2014-04-17 | 2014-09-24 | 深圳市瑞凌实业股份有限公司 | Power supply device for realizing double-wire three-arc welding |
| CN104057182B (en) * | 2014-04-17 | 2016-05-18 | 深圳市瑞凌实业股份有限公司 | Realize the supply unit of mariages three arc weldings |
| CN104117757A (en) * | 2014-08-06 | 2014-10-29 | 山东大学 | Efficient low heat input and double-wire surfacing method |
| CN104117757B (en) * | 2014-08-06 | 2017-01-18 | 山东大学 | Efficient low heat input and double-wire surfacing method |
| CN105562897A (en) * | 2016-03-11 | 2016-05-11 | 兰州理工大学 | Twin-wire bypass coupled arc efficient metal-inert gas (MIG) welding system |
| CN106513924B (en) * | 2016-11-11 | 2019-01-11 | 深圳市瑞凌实业股份有限公司 | Twin wire arc welds method and device |
| WO2018086629A1 (en) * | 2016-11-11 | 2018-05-17 | 深圳市瑞凌实业股份有限公司 | Dual-wire arc welding method and device |
| CN106513924A (en) * | 2016-11-11 | 2017-03-22 | 深圳市瑞凌实业股份有限公司 | Double-wire electric arc welding method and device |
| CN106914708B (en) * | 2017-02-27 | 2019-10-29 | 北京工业大学 | Laser twin-wire indirect arc composite welding apparatus and wire feed rate predict calculation method |
| CN106914708A (en) * | 2017-02-27 | 2017-07-04 | 北京工业大学 | Laser twin-wire indirect arc composite welding apparatus and wire feed rate prediction computational methods |
| CN108176915A (en) * | 2017-12-08 | 2018-06-19 | 深圳市瑞凌实业股份有限公司 | The striking control method of polymorphic double wire welding device and polymorphic double wire welding device |
| CN108500266B (en) * | 2018-04-19 | 2020-01-07 | 河北科技大学 | 7000 series aluminum alloy additive manufacturing method and system |
| CN108500266A (en) * | 2018-04-19 | 2018-09-07 | 河北科技大学 | 7000 line aluminium alloy increasing material manufacturing method and system |
| CN112139630A (en) * | 2019-06-28 | 2020-12-29 | 南京理工大学 | Method and device for electric arc additive manufacturing of consumable electrode with adjustable heat input |
| CN112139630B (en) * | 2019-06-28 | 2022-05-13 | 南京理工大学 | Method and device for electric arc additive manufacturing of consumable electrode with adjustable heat input |
| CN110919017A (en) * | 2019-12-20 | 2020-03-27 | 北京工业大学 | Method and device for preparing spherical metal powder by hot wire assisted plasma arc |
| CN110919017B (en) * | 2019-12-20 | 2023-03-28 | 北京工业大学 | Method and device for preparing spherical metal powder by hot wire assisted plasma arc |
| CN114247966A (en) * | 2021-12-16 | 2022-03-29 | 北京工业大学 | Dual-wire dissimilar material welding and additive method based on variable polarity power supply |
| CN114247962A (en) * | 2021-12-16 | 2022-03-29 | 北京工业大学 | Multi-electrode time-sharing conduction and polarity-changing alternating arc welding and material adding method |
| CN114247962B (en) * | 2021-12-16 | 2023-02-28 | 北京工业大学 | Multi-electrode time-sharing conduction and polarity-changing alternating arc welding and material adding method |
| CN114700643A (en) * | 2022-05-06 | 2022-07-05 | 盐城工学院 | High-deposition low-heat-input plasma-twin-wire bypass arc welding device and method |
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Application publication date: 20140122 |