CN106513924A - Double-wire electric arc welding method and device - Google Patents
Double-wire electric arc welding method and device Download PDFInfo
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- CN106513924A CN106513924A CN201611005197.3A CN201611005197A CN106513924A CN 106513924 A CN106513924 A CN 106513924A CN 201611005197 A CN201611005197 A CN 201611005197A CN 106513924 A CN106513924 A CN 106513924A
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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
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention discloses a double-wire electric arc welding method and device. The double-wire electric arc welding device comprises a wire conveying mechanism, a first welding wire tip, a second welding wire tip, a DC power supply, a first switch and a second switch, wherein a first welding wire and a second welding wire are correspondingly conveyed to the first welding wire tip and the second welding wire tip through the wire conveying mechanism; the first switch and the second switch are used for receiving a control signal and then are turned on by turns so as to control the DC power supply to sequentially supply power to the first welding wire tip and the second welding wire tip by turns. According to the technical scheme, the double-wire electric arc welding device has the advantages that the structure is simplified, so that the cost can be decreased.
Description
Technical field
The present invention relates to Electric arc welding technology field, more particularly to a kind of Twin wire arc welding method and device.
Background technology
Twin-wire Arc Welding is a kind of arc-welding method of efficient low_input_power, has extensive use in industrial welding field
Way and demand.Twin-wire Arc Welding is mainly characterized by：But insulated from each other welding wire end and Welder close to each other at two
Two independent electric arcs are formed between part, but shares a molten bath.Two are usually used in existing Twin-wire Arc Welding system
Independent, and the pulse metal active-gas welding power supply with Collaborative Control function.But the double wire welding device construction for thus constituting is complicated
And high cost.
The content of the invention
The main object of the present invention is to provide a kind of Twin wire arc welder, it is intended to simplify Twin wire arc welder
Construction, reduces cost.
For achieving the above object, the present invention proposes a kind of Twin wire arc welder, including wire feeder, the first welding wire
Ignition tip, the second welding tip, DC source, first switch and second switch；
Are delivered to the first welding tip respectively by the first welding wire and the second welding wire for the wire feeder and the second welding wire is conductive
Mouth；
First switch and second switch, receive control signal, turn in turn successively, taken turns with controlling the DC source successively
Flow and power to first welding tip and second welding tip.
Preferably, described DC source one end input respectively with the input and the second switch of the first switch
End connection, the outfan of the first switch is connected with first welding tip, the outfan of the second switch and institute
The connection of the second welding tip is stated, the other end of the DC source is connected with workpiece to be welded.
Preferably, the dutycycle of the first switch and the second switch is equal.
Preferably, the first switch and the second switch are both turned in the preset duration during switched conductive.
Preferably, the Preset Time is less than the 1/2 of first switch and second switch ON time.
Preferably, the DC source is constant-voltage DC source or constant-current dc power supply.
The present invention proposes that a kind of Twin wire arc welds method, comprises the following steps：
First welding wire and the second welding wire are delivered to the first welding tip and the second welding tip by wire feeder respectively；
First switch receives control signal conducting, is powered to first welding tip with controlling the DC source,
DC source, the first welding wire and workpiece to be welded form the first current loop, and the is formed between the first wire tip and workpiece to be welded
One electric arc；
Second switch receives control signal conducting, is powered to second welding tip with controlling the DC source,
DC source, the second welding wire and workpiece to be welded form the second current loop, and the is formed between the second wire tip and workpiece to be welded
Two electric arcs.
Preferably, the first switch and the second switch are simultaneously turned in Preset Time.
Preferably, the Preset Time is less than the 1/2 of first switch and second switch ON time.
Preferably, the DC source is constant-voltage DC source or constant-current dc power supply.
Technical solution of the present invention includes wire feeder, the first welding tip, the second welding tip, direct current by arranging
Power supply, first switch and second switch, define a kind of Twin wire arc welder.The wire feeder carries out wire feed；It is described
DC source powers to the first welding tip and the second welding tip.Control outside first switch and second switch reception
Signal so that turn in turn successively, to control the DC source successively in turn to first welding tip and described the
Two welding tips are powered, and electric arc is produced between welding wire and workpiece to be welded, and welding wire is melted by the huge heat that electric arc is produced, and is realized
Treat the welding of welder's part.Technical solution of the present invention only needs a DC source just to realize that Twin wire arc is welded, relative to existing
Twin wire arc welding system need two Collaborative Control functions pulse metal active-gas welding power supply, simplify Twin-wire Arc Welding tipping
Put, reduce installation cost.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the structural representation of one embodiment of Twin wire arc welder of the present invention；
Fig. 2 is the oscillogram of electric current I1 in Fig. 1；
Fig. 3 is the oscillogram of electric current I2 in Fig. 1；
Fig. 4 is the oscillogram of electric current IW in Fig. 1.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| F1 | Wire feeder | E2 | Second welding wire |
| F2 | Wire feeder | A1 | First electric arc |
| T1 | First welding tip | A2 | Second electric arc |
| T2 | Second welding tip | V1 | DC source |
| Q1 | First switch | 1 | Power supply |
| Q2 | Second switch | 2 | Stannum wire bond rifle |
| E1 | First welding wire |
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment a part of embodiment only of the invention, rather than the embodiment of whole.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used in the embodiment of the present invention
In the relative position relation under a certain particular pose (as shown in drawings) between each part, motion conditions etc. are explained, if should
When particular pose changes, then directionality indicates also correspondingly to change therewith.
In addition, the description for being related to " first ", " second " etc. in the present invention is only used for describing purpose, and it is not intended that referring to
Show or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", "
Two " at least one this feature can be expressed or be implicitly included to feature.In addition, the technical scheme between each embodiment can
To be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical scheme occurs
It is conflicting or will be understood that the combination of this technical scheme is not present when cannot realize, also not in the protection model of application claims
Within enclosing.
The present invention proposes a kind of Twin wire arc welder.
Reference Fig. 1, in embodiments of the present invention, the Twin wire arc welder, including wire feeder F1 and wire feeder
F2, the first welding tip T1, the second welding tip T2, DC source V1, first switch Q1 and second switch Q2.Wherein,
The wire feeder F1 and wire feed structure F2 by the first welding wire E1 and the second welding wire E2 deliver to respectively the first welding tip T1 and
Second welding tip T2；The DC source V1, powers to the first welding tip T1 and the second welding tip T2；First
Switch Q1 and second switch Q2, receives control signal, turns in turn successively, to control the DC source V1 successively in turn to institute
State the first welding tip T1 and the second welding tip T2 powers.
It should be noted that present embodiment adopts wire feeder F1 and wire feed structure F2 by the welderings of the first welding wire E1 and second
Silk E2 difference automatic feed the first welding tip T1 and the second welding tip T2, the first welding tip T1 and the second welding wire
Ignition tip T2 is arranged in stannum wire bond rifle 2, and between making the angle between two welding wire be in 0 ° to 90 °.
Form the first welding current loop between DC source V1, the first welding tip T1 and workpiece W to be welded, first
The first welding arc is formed between the end of welding wire E1 and workpiece W to be welded；DC source V1, the second welding tip T2 and treat
The second welding current loop is formed between welder part W, the second welding electricity between the end of the second welding wire E2 and workpiece W to be welded, is formed
Road.
The Twin wire arc welder further comprises controller (not shown), and controller outputs control signals to
The controlled end of first switch Q1 controlled end and second switch Q2.In this embodiment, first switch Q1 and second switch Q2 are taken turns successively
Conductance leads to.DC source passes through first switch Q1 and second switch Q2 connects the first welding tip T1 respectively and the second welding wire is led
Two root wires are powered by sparking plug T2 respectively.
The first switch Q1 and second switch Q2 switch operating in the way of 180 ° of phase place mutual deviation, makes DC source V1 to first
Welding tip T1 and the second welding tip T2.This working method only provides crest voltage, and without background current, therefore can
Preferably to avoid the electromagnetic force between two electric arc from disturbing.This method is using the distance between two root wires less than 10mm's
High deposition rate double-wire welding gun.
In the embodiment of the present invention, first switch Q1 and second switch Q2 can be switched using IGBT, MOSFET constant power, and
Other can realize the electrical switch or device of this function, not enumerate herein.
Technical solution of the present invention by arrange include wire feeder F1 and wire feeder F2, the first welding tip T1, the
Two welding tip T2, DC source V1, first switch Q1 and second switch Q2, define a kind of Twin wire arc welder.
The wire feeder F1 and wire feeder F2 carry out wire feed；The DC source V1 gives the first welding tip T1 and the second welding wire
Ignition tip T2 powers.Control signal outside first switch Q1 and second switch Q2 receptions so that turn in turn successively, to control
The DC source V1 is powered to the first welding tip T1 and the second welding tip T2 successively in turn, welding wire with
Treat between welder's W parts, to produce electric arc, welding wire is melted by the huge heat that electric arc is produced, the welding of welder's part is treated in realization.This
Bright technical scheme only needs a DC source just to realize that Twin wire arc is welded, and needs relative to existing Twin wire arc welding system
The pulse metal active-gas welding power supply of two Collaborative Control functions, simplifies Twin wire arc welder, reduces installation cost.
Specifically, described DC source V1 one end respectively with the input of first switch Q1 and the second switch Q2
Input connection, the outfan of first switch Q1 is connected with the first welding tip T1, the second switch Q2
Outfan be connected with the second welding tip T2, the other end of the DC source V1 is connected with workpiece W to be welded.
With reference to Fig. 2 and Fig. 3 further, the dutycycle of first switch Q1 and the second switch Q2 is equal.I.e.
One switch Q1 and the second switch Q2 ON times are equal.
Further, first switch Q1 and the second switch Q2 are equal in the preset duration during switched conductive
Conducting.It can be readily appreciated that Preset Time should be less than the ON time of first switch Q1 and second switch Q2.Preset Time
The visual concrete welding requirements of size and arrange.Overlapped by the short time of two power electronic switchings and ensured without background current mould
Arc stability switching under formula.The peak impulse voltage of two root wires is identical, but can be by different dutycycle adjustment arteries and veins
Current peak is rushed, therefore equally can be using the welding wire of two different-diameters, different materials and different wires feed rate, to meet not
Same welding process requirement.
Further, the Preset Time is less than the 1/2 of first switch Q1 and second switch Q2 ON times.Then first is electric
The electric arc displacement that arc A1 and the second electric arc A2 can be produced produced by adelphotaxy has time enough to return to origin-location,
Integral solder process is more stable.
In the present embodiment, the DC source is constant-voltage DC source or constant-current dc power supply.
Embodiment of the present invention technical scheme is expanded on further in conjunction with Fig. 1 to Fig. 4：
V1 in Fig. 1 is above-mentioned DC source, and the single channel of DC source V1 is exported by first switch Q1 and second switch Q2
Power supply is changed into dual-output power supply, by the conducting sequential for controlling first switch Q1 and second switch Q2, makes the DC source V1 can
With timesharing, it is also possible to while powering to the first welding wire E1 and the second welding wire E2.
Double-wire welding gun in Fig. 1 has the first welding tip T1 and the second welding tip T2 of mutually insulated, the first weldering
Silk E1 and the second welding wire E2 is sent into by wire feeder F1 and wire feeder F2.
It can be readily appreciated that can be with will be the DC source V1 in dotted line frame, first switch Q1 and second switch Q2 whole in Fig. 1
As a power supply 1 on body, the first switch Q1 output first welding tip T1 of termination of power supply 1 powers to the first welding wire E1；
The second switch Q2 output second welding tip T2 of termination of power supply 1, power to welding wire E2, and in power supply 1, DC source V1's is negative
Receive welder part W in pole.
In Fig. 1, the first electric arc A1 is the electric arc set up between the first welding wire E1 and electric welding workpiece W, and the second electric arc A2 is to build
Stand in the electric arc between the second welding wire E2 and workpiece W to be welded.
The conducting sequential and welding wire and workpiece of two high-power electronic switch of first switch Q1 and second switch Q2 in Fig. 1
Current waveform is as shown in Figures 2 to 4.
Wherein, for high-power electronic switch, ON is conducting, and OFF is cut-off；Flow through the first welding wire E1 and the first electric arc A1
Electric current be I1, flow through the second welding wire E2 and the second electric arc A2 electric current be I2, flow through workpiece W to be welded electric current be IW.
The conduction phase of reference Fig. 2 and Fig. 3, first switch Q1 and second switch Q2 is 180 ° of mutual deviation, in other words, first
During electric arc A1 works, the second electric arc A2 is to extinguish, otherwise during the second electric arc A2 works, the first electric arc A1 is to extinguish
's.This working method is completely eliminated the effect of the electromagnetic interference between two electric arc, it is possible that causing the first electric arc A1
The convert failed between the second electric arc A2 electric arcs.Arrange of short duration for this in handoff procedure of first switch Q1 with second switch Q2
Common ON time Δ t, i.e., before the shut-off of first switch Q1 before, second switch Q2 shorting advances；Equally in second switch Q2
Before shut-off, first switch Q1 shorting advance.Thereby guarantee that the stable switching between the first electric arc A1 and the second electric arc A2.
First switch Q1 and the common ON time Δ t in second switch Q2 handoff procedures are adjusted, can be sent not changing
Increase welding current under conditions of silk speed.In first switch Q1 with the common ON time Δ t of second switch Q2, the first electric arc
As long as A1 and the second electric arc A2 electric arcs can produce adelphotaxy, but ensure that Δ t is less than first switch Q1 or second switch
1/2 ON time of Q2, then the first electric arc A1 and the second electric arc A2, can produce adelphotaxy, produced electric arc displacement
There is time enough to return to origin-location, integral solder process is stable.
Based on above-mentioned Twin wire arc welder, the present invention proposes that a kind of Twin wire arc welds method, comprises the following steps：
First welding wire and the second welding wire are delivered to respectively by the first welding tip by wire feeder and the second welding wire is conductive
Mouth, powers to the first welding tip and the second welding tip by DC source；
First switch receives control signal conducting, is powered to first welding tip with controlling the DC source,
DC source, the first welding wire and workpiece to be welded form the first current loop, and the is formed between the first wire tip and workpiece to be welded
One electric arc；
Second switch receives control signal conducting, is powered to second welding tip with controlling the DC source,
DC source, the second welding wire and workpiece to be welded form the second current loop, and the is formed between the second wire tip and workpiece to be welded
Two electric arcs.
First switch and second switch are turned on successively in turn, and the first electric arc of control and the second electric arc alternating are treated welder's part and entered
Row welding.
In welding process, repeat the above steps, until workpiece to be welded completes welding.
Further, the first switch and the second switch are turned in Preset Time jointly.
Further, the Preset Time is less than the 1/2 of first switch and second switch ON time.
Further, the DC source is constant-voltage DC source or constant-current dc power supply.
The preferred embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in the scope of patent protection of the present invention in other related technical fields.
Claims (10)
1. a kind of Twin wire arc welder, it is characterised in that lead including wire feeder, the first welding tip, the second welding wire
Sparking plug, DC source, first switch and second switch；
First welding wire and the second welding wire are delivered to the first welding tip and the second welding tip by the wire feeder respectively；
First switch and second switch, receive control signal, turn in turn successively, control the DC source successively in turn to institute
State the first welding tip and second welding tip is powered.
2. Twin wire arc welder as claimed in claim 1, it is characterised in that described DC source one end respectively with it is described
The input connection of the input of first switch and the second switch, the outfan of the first switch and first welding wire
Ignition tip connects, and the outfan of the second switch is connected with second welding tip, the other end of the DC source
It is connected with workpiece to be welded.
3. Twin wire arc welder as claimed in claim 1, it is characterised in that the first switch and the second switch
Dutycycle it is equal.
4. Twin wire arc welder as claimed in claim 3, it is characterised in that the first switch and the second switch
It is both turned in the preset duration during switched conductive.
5. Twin wire arc welder as claimed in claim 4, it is characterised in that the preset duration less than first switch and
The 1/2 of second switch ON time.
6. the Twin wire arc welder as described in any one in claim 1 to 5, it is characterised in that the DC source
For constant-voltage DC source or constant-current dc power supply.
7. a kind of Twin wire arc welds method, it is characterised in that comprise the following steps：
First welding wire and the second welding wire are delivered to the first welding tip and the second welding tip by wire feeder respectively；
When first switch receives control signal to be turned on, control DC source is powered to first welding tip, unidirectional current
Source, the first welding wire and workpiece to be welded form the first current loop, form first electric between the first wire tip and workpiece to be welded
Arc；
When second switch receives control signal to be turned on, control the DC source and power to second welding tip, directly
Stream power supply, the second welding wire and workpiece to be welded form the second current loop, form second between the second wire tip and workpiece to be welded
Electric arc.
8. Twin wire arc as claimed in claim 7 welds method, it is characterised in that the first switch and the second switch
Turned in preset duration jointly.
9. Twin wire arc as claimed in claim 8 welds method, it is characterised in that the preset duration less than first switch and
The 1/2 of second switch ON time.
10. the Twin wire arc as described in any one in claim 7 to 9 welds method, it is characterised in that the DC source
For constant-voltage DC source or constant-current dc power supply.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611005197.3A CN106513924B (en) | 2016-11-11 | 2016-11-11 | Twin wire arc welds method and device |
| PCT/CN2017/111659 WO2018086629A1 (en) | 2016-11-11 | 2017-11-17 | Dual-wire arc welding method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611005197.3A CN106513924B (en) | 2016-11-11 | 2016-11-11 | Twin wire arc welds method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106513924A true CN106513924A (en) | 2017-03-22 |
| CN106513924B CN106513924B (en) | 2019-01-11 |
Family
ID=58351883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611005197.3A Active CN106513924B (en) | 2016-11-11 | 2016-11-11 | Twin wire arc welds method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106513924B (en) |
| WO (1) | WO2018086629A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114951921A (en) * | 2022-06-09 | 2022-08-30 | 斯图加特航空自动化（青岛）有限公司 | Double-wire narrow-gap GMAW (gas metal arc welding) welding device for thick plate of middle groove of scraper conveyor of coal machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117206645B (en) * | 2023-11-09 | 2024-01-23 | 珠海东方重工股份有限公司 | Double-wire high-speed welding robot |
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| NL7610983A (en) * | 1975-10-15 | 1977-04-19 | Eichhorn Friedrich Prof Dr | DEVICE AND METHOD FOR WELDING PROCESSING. |
| JPS5291752A (en) * | 1976-01-27 | 1977-08-02 | Matsushita Electric Ind Co Ltd | Automatic arc welding method |
| US20030102295A1 (en) * | 2001-12-04 | 2003-06-05 | Rogers Frank S. | Voltage controlled arc spray |
| CN101972879A (en) * | 2010-11-12 | 2011-02-16 | 哈尔滨工业大学 | Electric arc welding method with high welding wire melting speed and low welding heat input |
| CN102069265A (en) * | 2010-12-23 | 2011-05-25 | 哈尔滨工业大学 | Dynamic twin-wire three-arc welding method |
| CN103341681A (en) * | 2013-06-26 | 2013-10-09 | 哈尔滨工业大学 | Multi-state double-wire electrical arc welding device and welding method |
| CN103521885A (en) * | 2013-09-25 | 2014-01-22 | 北京工业大学 | Welding method with indirect arc between double welding wires alternately changed to form by-pass arc |
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| US8895896B2 (en) * | 2004-01-12 | 2014-11-25 | Lincoln Global, Inc. | Modified series arc welding and improved control of one sided series arc welding |
| CN104400181B (en) * | 2014-12-02 | 2016-06-29 | 哈尔滨工业大学（威海） | Mariages underwater wet welding device and method |
| 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 |
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2016
- 2016-11-11 CN CN201611005197.3A patent/CN106513924B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7610983A (en) * | 1975-10-15 | 1977-04-19 | Eichhorn Friedrich Prof Dr | DEVICE AND METHOD FOR WELDING PROCESSING. |
| JPS5291752A (en) * | 1976-01-27 | 1977-08-02 | Matsushita Electric Ind Co Ltd | Automatic arc welding method |
| US20030102295A1 (en) * | 2001-12-04 | 2003-06-05 | Rogers Frank S. | Voltage controlled arc spray |
| CN101972879A (en) * | 2010-11-12 | 2011-02-16 | 哈尔滨工业大学 | Electric arc welding method with high welding wire melting speed and low welding heat input |
| CN102069265A (en) * | 2010-12-23 | 2011-05-25 | 哈尔滨工业大学 | Dynamic twin-wire three-arc welding method |
| CN103341681A (en) * | 2013-06-26 | 2013-10-09 | 哈尔滨工业大学 | Multi-state double-wire electrical arc welding device and welding method |
| CN103521885A (en) * | 2013-09-25 | 2014-01-22 | 北京工业大学 | Welding method with indirect arc between double welding wires alternately changed to form by-pass arc |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114951921A (en) * | 2022-06-09 | 2022-08-30 | 斯图加特航空自动化（青岛）有限公司 | Double-wire narrow-gap GMAW (gas metal arc welding) welding device for thick plate of middle groove of scraper conveyor of coal machine |
| CN114951921B (en) * | 2022-06-09 | 2024-03-08 | 斯图加特航空自动化（青岛）有限公司 | Double-wire narrow-gap GMAW welding device for middle groove thick plate of scraper conveyor of coal machine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018086629A1 (en) | 2018-05-17 |
| CN106513924B (en) | 2019-01-11 |
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