WO2008016084A1 - Procédé de soudage à l'arc sous gaz avec métal tandem, torche de soudage et dispositif de soudage utilisés - Google Patents
Procédé de soudage à l'arc sous gaz avec métal tandem, torche de soudage et dispositif de soudage utilisés Download PDFInfo
- Publication number
- WO2008016084A1 WO2008016084A1 PCT/JP2007/065079 JP2007065079W WO2008016084A1 WO 2008016084 A1 WO2008016084 A1 WO 2008016084A1 JP 2007065079 W JP2007065079 W JP 2007065079W WO 2008016084 A1 WO2008016084 A1 WO 2008016084A1
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- WIPO (PCT)
- Prior art keywords
- gas
- electrode
- welding
- carbon dioxide
- shielding
- Prior art date
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Classifications
-
- 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
Definitions
- the present invention relates to a tandem gas metal arc (GMA) welding method that can move two electrodes simultaneously to increase the amount of welding per one pass, a welding torch and a welding apparatus used in the welding method.
- GMA gas metal arc
- Tandem GMA welding which is a highly efficient welding method, is required in many fields, such as fields in which thick plate welding is performed for construction machinery and bridges, and fields in which thin plate welding is performed for automobiles. It is popular.
- Tandem GMA welding is a method in which two electrodes and a welding wire are used and two arcs are generated simultaneously.
- the main advantage is that the welding speed can be increased and the amount of welding per pass can be increased.
- Japanese Patent Application Laid-Open No. 2003-53545 discloses a tandem GMA welding method using a solid wire for welding without copper plating!
- the present invention has been made in view of the above circumstances, and by supplying a shielding gas having a different composition suitable for the leading electrode and the trailing electrode, it is possible to stabilize the droplet transfer that reduces the penetration. It is an object of the present invention to provide a tandem gas metal arc welding method, a welding torch and a welding apparatus used therefor that can reduce spatter.
- the present invention relates to a tandem gas metal arc welding method using a leading electrode and a trailing electrode, and a shielding gas force for leading electrode supplied to the leading electrode, argon gas, and Two kinds of mixed gas of carbon dioxide, or three kinds of mixed gas of argon gas, carbon dioxide gas and oxygen gas.
- a tandem gas metal arc welding method characterized in that the concentration of carbon dioxide in the shielding gas for the trailing electrode is made lower than the concentration of carbon dioxide in the shielding gas for the leading electrode.
- the shield gas for the leading electrode is used. It is preferable that the carbon dioxide gas concentration is 5 vol.% Or more and less than 40 vol.%, And the oxygen gas concentration in the preceding electrode shielding gas is 0 or more and 10 vol.% Or less.
- Oxygen gas does not have the effect of deepening the penetration like carbon dioxide gas, but if it is added in a small amount, there is little adverse effect on the welding quality and spatter generation amount. Does not interfere with the addition. However, if the amount added is too large, the generation of the snout increases and the oxide adheres to the bead surface as slag after the droplet metal solidifies.
- the concentration of oxygen gas in the shielding gas of the leading electrode is preferably 5 vol.% Or less, preferably Ovol.% Or more and lOvol.% Or less.
- the difference between the carbon dioxide concentration in the leading electrode shield gas and the carbon dioxide concentration in the trailing electrode shield gas is 3% or more, and the rear It is preferred that the oxygen gas concentration in the row electrode shielding gas is Ovol.% Or more and 10 vol.% Or less. More preferably, it is Ovol.% Or more and 5 vol.
- the lower the oxygen concentration in the shielding gas for the trailing electrode the lower the bead surface slag and the lower the amount of dissolved oxygen contained in the weld metal. It is preferable because toughness is improved.
- the present invention is a welding torch used in the tandem gas metal arc welding method, wherein the torch includes a plurality of electrodes inside the nozzle, and further includes a shield gas for the leading electrode and Provided is a tandem gas metal arc welding torch comprising a partition that prevents mixing with a shielding gas for a trailing electrode.
- the present invention is a welding torch used in the above tandem gas metal arc welding method, wherein a protective cover for shielding the weld pool is provided behind the welding progress direction. Provide a welding torch.
- the protective cover preferably includes a shield gas nozzle.
- the present invention further provides a tandem comprising a welding torch having a leading electrode and a trailing electrode, and a shielding gas supply source for supplying a shielding gas to each electrode.
- a welding torch having a leading electrode and a trailing electrode
- a shielding gas supply source for supplying a shielding gas to each electrode.
- tandem gas metal arc welding apparatus comprising a device for switching between a shield gas supplied to the preceding electrode and a shield gas supplied to the succeeding electrode.
- tandem gas metal arc welding method of the present invention in the tandem GMA welding method, by using an appropriate shield gas for each of the leading electrode and the trailing electrode, welding is performed without reducing penetration. Sputtering that occurs can be reduced. This reduces the spatter removal work and reduces the cost in the welding process with the power S.
- a shield gas having a different composition is supplied to the leading electrode and the trailing electrode, respectively, and the concentration of carbon dioxide in the shielding gas for the trailing electrode is made lower than the concentration of carbon dioxide for the leading electrode.
- the shielding gas for the leading electrode is a mixed gas of two kinds of argon gas and carbon dioxide, or the mixed gas of three kinds of argon, carbon dioxide and oxygen
- the shielding gas for the trailing electrode is argon gas alone, argon gas and carbon dioxide A mixed gas of argon gas and oxygen gas, or a mixed gas of argon gas, carbon dioxide gas and oxygen gas
- the concentration of the carbon dioxide gas in the leading electrode shield gas is the same, the penetration is considered to hardly depend on the concentration of the carbon dioxide gas in the trailing electrode shield gas.
- the concentration of carbon dioxide in the shielding gas for the trailing electrode and making it argon gas rich the detachment of the droplets is improved and the amount of spatter generated by the trailing electrode is reduced. The amount of spatter generated can be reduced.
- a plurality of electrodes are provided inside the nozzle, and a partition is provided between the preceding electrode and the succeeding electrode in the nozzle.
- a protective cover is attached to the welding torch, a shield gas nozzle is attached to the protective cover, and a shield gas is supplied from the shield gas nozzle, so that the molten pool can be shielded from the atmosphere. It is possible to reduce welding defects such as blow holes.
- the traveling direction of the welding torch is changed as appropriate, so that the leading and trailing electrodes are switched.
- a gas switching device that supplies a shield gas for the leading electrode to the electrode that becomes the leading electrode and a shield gas for the trailing electrode to the electrode that becomes the trailing electrode in accordance with the change in the welding traveling direction was provided.
- FIG. 1 is a schematic configuration diagram showing an example of a welding apparatus used in a welding method of the present invention.
- 2 is a schematic configuration diagram showing a first example of a welding torch of the welding apparatus of FIG. 1.
- FIG. 3 is a schematic configuration diagram showing a second example of a welding torch.
- FIG. 4 is a schematic configuration diagram showing a third example of a welding torch.
- FIG. 5 is a schematic configuration diagram showing a fourth example of a welding torch.
- Control device 2 Leading electrode welding power source
- Shield gas supply source for leading electrode 8 Shield gas supply source for trailing electrode
- FIG. 1 shows an example of a welding apparatus used in the tandem GMA welding method of the present invention
- FIG. 2 shows a first example of a welding torch used in the welding apparatus.
- reference numeral 1 denotes a control device.
- This control device 1 sends control signals for controlling the welding current value, welding voltage value, welding wire delivery speed, etc., to the leading electrode welding power source 2, the trailing electrode welding power source 3, the leading electrode welding wire feeding device 4, These are sent to the subsequent electrode welding wire supply device 5, and these operations are individually controlled.
- a control signal for controlling the gas switching is sent to the gas switching device 22 in accordance with the change in the welding progress direction.
- a predetermined welding current is sent from the leading electrode welding power source 2 and the trailing electrode welding power source 3 to the leading electrode welding wire supply device 4 and the trailing electrode welding wire supply device 5, respectively. Further, these leading electrode welding wire feeder 4 and trailing electrode welding wire feeder The welding current is applied to welding wire A and welding wire B, which are fed from 5 to the leading electrode and the trailing electrode, respectively, at a predetermined supply speed.
- the welding torch 6 is connected to the leading electrode shield gas supply source 7 and the trailing electrode shield gas supply source 8 via the gas switching device 22 and the leading electrode shielding gas and the trailing electrode, respectively.
- Shielding gas is supplied individually through pipes 9 and 10 at a predetermined flow rate.
- the gas switching device 22 receives the signal from the control device 1, and supplies the leading electrode shield gas to the leading electrode side and the trailing electrode shielding gas to the trailing electrode side in accordance with the welding direction. Switch to supply appropriate shielding gas to 9 and pipe 10.
- FIG. 2 shows a first example of the welding torch 6.
- This welding torch 6 is arranged in a front-and-rear direction along the welding direction at a predetermined interval in the nozzle 11 with a cover-like nozzle 11 that injects the above-described two kinds of shielding gas toward the workpiece C.
- Leading electrode 12 and trailing electrode 13 leading electrode inlet 14 for feeding leading electrode shield gas and leading electrode welding wire A into nozzle 11, shield electrode gas for trailing electrode and trailing electrode welding And a trailing electrode inlet 15 through which the wire B is fed.
- a preceding flow path 16 through which the leading electrode shield gas flows is formed on the front side in the welding direction of the leading electrode 12, and the trailing electrode shim is formed on the rear side in the welding direction of the trailing electrode 13.
- a trailing flow path 17 through which a gas is flowing is formed.
- leading electrode welding wire A introduced from the leading electrode introduction port 14 is fed through a through hole formed in the leading electrode 12.
- the trailing electrode welding wire B introduced from the trailing electrode introduction port 15 is fed through a through hole formed in the trailing electrode 13.
- each electrode is freely selectable. Is slightly inclined toward the front side in the welding direction, and the trailing electrode 13 is slightly inclined toward the rear side in the welding direction.
- the welding wires A and B fed from the respective electrodes 12 and 13 are also slightly inclined, and are inclined about 4 degrees with respect to the vertical direction of the workpiece C, respectively.
- the leading electrode shield gas flows from the leading channel 16 of the nozzle 11 having the above structure, and the trailing electrode shielding gas flows from the trailing channel 17 and is blown out toward the workpiece C.
- the welding wires A and B are delivered from the electrodes 12 and 13, respectively, and a welding current is applied to the electrodes 12 and 13 to form an arc. In this state, the welding torch 6 moves relative to the workpiece C in the illustrated welding direction.
- leading electrode 12 and the resulting arc are surrounded by the leading electrode shielding gas
- trailing electrode 13 and the resulting arc are surrounded by the trailing electrode shielding gas, and are each shielded from the atmosphere.
- the composition of the shielding gas for the leading electrode and the shielding gas for the trailing electrode is different.
- a mixed gas of argon gas and carbon dioxide or a mixed gas of argon gas, carbon dioxide and oxygen gas is used.
- the carbon dioxide gas concentration in the shielding gas for the leading electrode is preferably 10 vol.% Or more and 30 vol.% Or less, preferably 5 vol.% Or more and less than 40 vol.%. Carbon dioxide concentration is 5vol.
- the arc is unstable and the penetration becomes insufficient, and if it is 40 vol.% Or more, the effect of reducing the sputtering is lost. Especially at 30 vol.% Or less, arc stability and spatter reduction effect are good.
- the oxygen gas concentration in the shield electrode electrode gas is preferably 0 vol.% Or more and 10 vol.% Or less, more preferably 5 vol.% Or less.
- the oxygen gas concentration exceeds 10 vol.%, The spatter and slag increase, and the mechanical properties of the joint deteriorate.
- the shielding gas for the trailing electrode includes argon gas alone, a mixed gas of two types of argon gas and carbon dioxide, a mixed gas of two types of argon gas and oxygen gas, or argon gas and carbonic acid gas.
- argon gas alone a mixed gas of two types of argon gas and carbon dioxide
- a mixed gas of two types of argon gas and oxygen gas or argon gas and carbonic acid gas.
- a triple gas mixture with oxygen gas is used.
- the concentration of carbon dioxide in the shielding gas for the trailing electrode is preferably Ovol.% Or more and less than 37 vol.%. Good.
- the concentration of oxygen gas in the shielding gas for the trailing electrode is preferably Ovol.% Or more and less than 10 vol.%, More preferably 5 vol.% Or less.
- the shielding gas composition of both is determined so that the concentration of the carbon dioxide gas in the shielding gas for the trailing electrode is lower than the concentration of the carbon dioxide gas in the shielding gas for the leading electrode.
- the difference in carbon dioxide concentration in the shielding gas between the two is preferably 3 vol.% Or more, more preferably 5 vol.% Or more. If the difference in carbon dioxide concentration between the two shielding gases is less than 3 vol.%, The effect of reducing the sputtering becomes insufficient. On the other hand, the spatter reduction effect is particularly good at 5 vol.% Or more.
- the composition of the leading electrode shield gas and the composition of the trailing electrode shield gas are made different so that the concentration of carbon dioxide in the trailing electrode shield gas is such that the carbon dioxide concentration in the leading electrode shield gas is low.
- tandem gas metal arc welding method of the present invention can be applied not only to the torch shape shown in FIG. 2 but also to a tandem GMA welding torch in which nozzles are independent for each electrode.
- FIG. 3 shows a second example of the welding torch used in the welding method of the present invention.
- the welding torch 6 shown in FIG. 3 is provided with a partition plate 19 that partitions the electrodes 12 and 13 between the leading electrode 12 and the trailing electrode 13 and substantially at the center of the nozzle 11.
- the torch 6 shown in FIG. 3 is different from the torch shown in FIG.
- the shielding gas for the leading electrode and the shielding gas for the trailing electrode are not mixed in the nozzle 11, and the effect of the shielding gas is maximized. be able to.
- FIG. 4 shows a third example of the welding torch which is the force of the present invention
- FIG. 5 shows the fourth example.
- a dome-shaped protective cover 20 is attached to the rear side of the nozzle 11 in the welding direction.
- the welding torch 6 of the fourth example further includes the protective cover.
- One is equipped with a shield gas nozzle 21.
- the length of the weld pool in tandem GMA welding is longer than that of the conventional weld pool in GMA welding using a single wire. For this reason, the conventional welding torch could not sufficiently shield the weld pool behind the welding direction.
- a protective cover 20 is attached to the rear of the welding torch 6 and the welding pool is supplied with shielding gas so as to shield the entire molten pool, thereby oxidizing and nitriding the weld metal, blowholes, etc. It becomes possible to prevent welding defects.
- the shield gas supplied to the shield gas nozzle 21 includes argon gas, helium gas, a mixed gas of argon gas and helium gas, a mixed gas of argon gas and carbon dioxide, or argon gas, carbon dioxide and oxygen. It is possible to use a triple gas mixture with gas.
- the welding torch according to the present invention is not limited to the shapes shown in FIGS. 2 to 5 shown in FIGS. 2 to 5, but may be a tandem GMA welding torch in which nozzles are independent for each electrode.
- the shielding gas for the leading electrode and the shielding gas for the trailing electrode a mixed gas of argon gas and carbonic acid gas is used, and the total amount of spatter generated during welding is changed using a sputtering collection box. Collected and measured.
- the flow rates of the leading electrode shielding gas and the trailing electrode shielding gas were 25 L / min., Respectively.
- a solid wire (YGW11) having a diameter of 1 ⁇ 2 mm was used as the welding wire.
- the mild steel welding current was set to 325A for both electrodes, and the arc voltage was adjusted to the boundary voltage that changed from the short circuit to the spray region for each shield gas composition.
- mother The material used was SS400 (thickness 12 mm), which is a general structural rolled steel specified in JIS G 3101.
- the torch posture is vertical, the distance between the leading electrode and the trailing electrode is 19 mm, and the angle of each electrode is 4 degrees with respect to the vertical direction as shown in FIG. The distance was 25 mm.
- the numbers on the bottom indicate sputter evaluation. With reference to 3, the larger the number, the more effective the amount of spatter generated.
- the numbers in the upper part of each column in Table 2 are the sample numbers as in Table 1, and are in the range of No. 1-10,; .1 1 to 25, 26,; and 31 ⁇ . This is outside the scope of the present invention.
- the lower row shows the results of evaluation of penetration.
- the evaluation criteria for penetration are as follows.
- “-” in Table 2 indicates that it is not subject to evaluation in the same manner as “-” in Table 1.
- ⁇ ⁇ ⁇ 12 or ⁇ ⁇ 14 may be used as a standard, and it is not particular about standard No. 13.
- the effect of the invention shown in this example is for the leading electrode No. 11, Nol 2, No. 13, Nol 4, No. 15, No. 16 with the same composition gas applied to the shielding gas and the shielding gas for the trailing electrode. This shows the fact that when the carbon dioxide concentration is changed, the melting does not decrease.
- the amount of spatter generated can be reduced by reducing the concentration of carbon dioxide in the shielding gas for the trailing electrode to be lower than the shielding gas for the leading electrode.
- concentration of carbon dioxide in the shielding gas for the leading electrode is 20 vol.% (No. 24, No. 14, No. 8, No. 6, No. 3, No. 29)
- concentration of carbon dioxide in the electrode shielding gas is 10 vol.%, 5 vol.%, 2 vol.%, And 0 vol.
- the concentration of carbon dioxide in the shielding gas for the leading electrode is 5 vol.%, 10 vol.%, And 30 ⁇ 1 ⁇ %.
- Nos. 16-21 and 31 can reduce the amount of spatter almost unchanged even if the concentration of carbon dioxide in the shielding gas for the trailing electrode is lowered. It was inappropriate because it was not.
- the concentration of carbon dioxide gas in the shield electrode electrode gas is preferably 5 vol.% Or more and less than 40 vol.%, More preferably 10 vol.% Or more and 30 vol.
- the required penetration varies depending on the thickness of the object.
- carbon dioxide concentration in the shielding gas for the leading electrode is about 10 vol.% To 20 vol.
- the tandem gas metal arc welding method of the present invention it is possible to reduce spatter generated during welding without reducing penetration. As a result, the spatter removal work can be reduced and the cost in the welding process can be reduced. Furthermore, the transfer of droplets becomes stable, and spatter can be reduced without reducing penetration.
- shield gases having different compositions can be supplied to the leading electrode and the trailing electrode without being mixed in the nozzle, Therefore, it is possible to maximize the effect of the shielding gas.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/375,753 US8461471B2 (en) | 2006-08-02 | 2007-08-01 | Tandem gas metal arc welding |
EP07791759A EP2058079A4 (en) | 2006-08-02 | 2007-08-01 | METHOD FOR ARC WELDING WITH METAL TANDEM, WELDING TORCH AND WELDING DEVICE USED |
JP2008527776A JP5345392B2 (ja) | 2006-08-02 | 2007-08-01 | タンデムガスメタルアーク溶接方法、これに用いられる溶接用トーチおよび溶接装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-211093 | 2006-08-02 | ||
JP2006211093 | 2006-08-02 |
Publications (1)
Publication Number | Publication Date |
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WO2008016084A1 true WO2008016084A1 (fr) | 2008-02-07 |
Family
ID=38997259
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/065079 WO2008016084A1 (fr) | 2006-08-02 | 2007-08-01 | Procédé de soudage à l'arc sous gaz avec métal tandem, torche de soudage et dispositif de soudage utilisés |
Country Status (5)
Country | Link |
---|---|
US (1) | US8461471B2 (ja) |
EP (1) | EP2058079A4 (ja) |
JP (1) | JP5345392B2 (ja) |
CN (1) | CN101495263A (ja) |
WO (1) | WO2008016084A1 (ja) |
Cited By (4)
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JP2013111597A (ja) * | 2011-11-28 | 2013-06-10 | Panasonic Corp | アーク溶接方法 |
JP2013158826A (ja) * | 2012-02-08 | 2013-08-19 | Taiyo Nippon Sanso Corp | 複合溶接方法及び複合溶接用の溶接トーチ |
EP2636477A1 (en) | 2012-03-09 | 2013-09-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Tandem gas-shielded arc welding method |
JP2021533997A (ja) * | 2018-08-13 | 2021-12-09 | フロニウス・インテルナツィオナール・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツングFronius International Gmbh | デュアルワイヤ溶接トーチのための一対の2ノズルアセンブリ受容器、および一対の2ノズルアセンブリ受容器を有するデュアルワイヤ溶接トーチ |
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US20110084053A1 (en) * | 2009-10-12 | 2011-04-14 | Thomas Edward Doyle | Narrow Groove Gas Metal Arc Welding Torch |
CN101817112A (zh) * | 2010-05-17 | 2010-09-01 | 哈尔滨工业大学 | 单电源单面串联双tig电弧焊接方法 |
DE102010038302A1 (de) * | 2010-07-22 | 2012-01-26 | Linde Aktiengesellschaft | Verfahren zum Kurzlichtbogen-Tandemschweißen |
JP5700997B2 (ja) * | 2010-10-05 | 2015-04-15 | 川崎重工業株式会社 | 溶接ヘッドおよびそれを備えた溶接装置 |
JP5287962B2 (ja) * | 2011-01-26 | 2013-09-11 | 株式会社デンソー | 溶接装置 |
JP5626994B2 (ja) * | 2011-01-30 | 2014-11-19 | 日鐵住金溶接工業株式会社 | インサートチップおよびプラズマトーチ |
US20130068745A1 (en) * | 2011-09-15 | 2013-03-21 | Lincoln Global | Gas shielding device for a welding system |
CN102513663A (zh) * | 2011-12-28 | 2012-06-27 | 上海宝钢车轮有限公司 | 钢制车轮焊接用保护气体 |
JP5843683B2 (ja) * | 2012-03-28 | 2016-01-13 | 株式会社神戸製鋼所 | タンデム溶接トーチ |
CN106270978A (zh) * | 2016-08-31 | 2017-01-04 | 太仓市华盈电子材料有限公司 | 一种双丝焊嘴机构 |
CN116786952B (zh) * | 2023-07-14 | 2024-03-08 | 安徽晶卓航智能科技有限公司 | 一种能弧形焊的气体保护焊接头 |
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- 2007-08-01 EP EP07791759A patent/EP2058079A4/en not_active Withdrawn
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JP2013111597A (ja) * | 2011-11-28 | 2013-06-10 | Panasonic Corp | アーク溶接方法 |
JP2013158826A (ja) * | 2012-02-08 | 2013-08-19 | Taiyo Nippon Sanso Corp | 複合溶接方法及び複合溶接用の溶接トーチ |
US9925622B2 (en) | 2012-02-08 | 2018-03-27 | Taiyo Nippon Sanso Corporation | Hybrid welding method and welding torch for hybrid welding |
EP2636477A1 (en) | 2012-03-09 | 2013-09-11 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Tandem gas-shielded arc welding method |
US9266197B2 (en) | 2012-03-09 | 2016-02-23 | Kobe Steel, Ltd. | Tandem gas-shielded arc welding method |
JP2021533997A (ja) * | 2018-08-13 | 2021-12-09 | フロニウス・インテルナツィオナール・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツングFronius International Gmbh | デュアルワイヤ溶接トーチのための一対の2ノズルアセンブリ受容器、および一対の2ノズルアセンブリ受容器を有するデュアルワイヤ溶接トーチ |
JP7138235B2 (ja) | 2018-08-13 | 2022-09-15 | フロニウス・インテルナツィオナール・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | デュアルワイヤ溶接トーチのための一対の2ノズルアセンブリ受容器、および一対の2ノズルアセンブリ受容器を有するデュアルワイヤ溶接トーチ |
US11794269B2 (en) | 2018-08-13 | 2023-10-24 | Fronius International Gmbh | Pair of two nozzle assembly receptacles for a dual-wire welding torch and dual-wire welding torch having such a pair of two nozzle assembly receptacles |
Also Published As
Publication number | Publication date |
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US20090236320A1 (en) | 2009-09-24 |
JPWO2008016084A1 (ja) | 2009-12-24 |
EP2058079A4 (en) | 2009-11-04 |
JP5345392B2 (ja) | 2013-11-20 |
US8461471B2 (en) | 2013-06-11 |
CN101495263A (zh) | 2009-07-29 |
EP2058079A1 (en) | 2009-05-13 |
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