WO2008070930A1 - Appareil et procédé de soudage - Google Patents

Appareil et procédé de soudage Download PDF

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Publication number
WO2008070930A1
WO2008070930A1 PCT/AU2007/001937 AU2007001937W WO2008070930A1 WO 2008070930 A1 WO2008070930 A1 WO 2008070930A1 AU 2007001937 W AU2007001937 W AU 2007001937W WO 2008070930 A1 WO2008070930 A1 WO 2008070930A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
fume
shroud
welding
torch
Prior art date
Application number
PCT/AU2007/001937
Other languages
English (en)
Inventor
Paul Cooper
Ajit Godbole
John Norrish
Original Assignee
Boc Limited
University Of Wollongong
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2006907022A external-priority patent/AU2006907022A0/en
Application filed by Boc Limited, University Of Wollongong filed Critical Boc Limited
Publication of WO2008070930A1 publication Critical patent/WO2008070930A1/fr

Links

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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0046—Welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • 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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0026—Auxiliary equipment
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/147—Features outside the nozzle for feeding the fluid stream towards the workpiece
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • B23K26/703—Cooling arrangements

Definitions

  • the present invention relates to welding, and in particular to a welding method and apparatus for providing improved shielding of the weld zone.
  • the present invention provides improvements in fume gas extraction.
  • GMAW Gas Metal Arc Welding
  • MIG metal inert gas
  • MAG metal active gas
  • Electron beam welding is a process that melts and joins metals by heating them with an electron beam.
  • the cathode of the electron beam gun is a negatively charged filament which, when heated up to its thermionic emission temperature, emits electrons.
  • the electrons are accelerated and pass through an aperture in the anode and are focused by an electromagnetic coil to a point at the workpiece surface.
  • An electron beam of very high intensity can vaporize the metal and produce a deep penetrating keyhole and hence weld.
  • EBW is typically performed in vacuo.
  • medium-vacuum EBW and non-vacuum EBW have also been developed.
  • Laser beam welding is a process that melts and joins metals by heating them with a laser beam.
  • the laser beam can be produced either by a solid-state laser or a gas laser. In either case, the laser beam can be focused and directed by optical means to achieve high power densities.
  • ionisation by the laser beam produces plasma, which can absorb and scatter the laser beam and significantly reduce the depth of penetration. It may therefore be necessary to remove or suppress the plasma.
  • Plasma control gas is typically directed sideways to blow and deflect the plasma away from the beam path, such as disclosed in US Patent No.'s 4,128,753 and 4,127,761.
  • a shield gas for protecting the molten metal may also be provided, for example as disclosed in US Patent No. 6,667,456.
  • the present invention provides a torch for welding, comprising: a high energy beam adapted to provide heat to a welding site and at least one shroud gas port spaced radially outward from the high energy beam and adapted to impart to an exiting shroud gas a radially outward component of velocity.
  • a high energy beam adapted to provide heat to a welding site and at least one shroud gas port spaced radially outward from the high energy beam and adapted to impart to an exiting shroud gas a radially outward component of velocity.
  • the high energy beam is in the form of an electron beam
  • LBW applications the high energy beam is in the form of a laser beam.
  • the shroud gas port is preferably adapted to direct the exiting shroud gas in a substantially radially outward direction, i.e. generally 90° to the axis of the torch.
  • the exiting shroud gas may be directed generally between about 30° to about 90° with respect to the torch axis and in a downwardly direction, i.e. towards the workpiece.
  • the exiting shroud gas is directed about 70° with respect to the axis of the torch and directed downwardly towards the workpiece.
  • the torch may include an inner sleeve and an outer sleeve for defining therebetween an annular passage for the shroud gas, the shroud gas port being positioned at or near the distal end of the outer sleeve.
  • both the inner sleeve and the outer sleeve circumscribe the heat source and are radially spaced from the high energy beam.
  • At least one inlet is provided for supplying the annular passage with shroud gas.
  • the shroud gas port is adapted such that the exiting shroud gas is produced as a relatively thin "curtain" radiating away from the torch.
  • the shroud gas port is adapted such that the exiting shroud gas is produced as an expanding "wedge" of gas radiating from the torch.
  • the exiting shroud gas may be considered as a "radial gas jet” forming an "aerodynamic flange" about the welding site.
  • the present invention provides significant advantages in relation to shielding efficiency in comparison with prior art welding torches.
  • the present inventors have found that the shroud gas port of the present invention, which provides a shroud gas curtain having a radially outward component of velocity, provides surprisingly improved shielding to the welding site, and in particular to the weld pool.
  • the shroud gas curtain tends to form an envelope around the welding site, thus effectively isolating - A - the welding site from the surroundings. Improvements in weld quality are also contemplated since atmospheric contamination of the weld pool is relatively reduced.
  • the aforementioned apparatus may also include at least one shield gas port adapted to direct a shield gas curtain around the high energy beam and the welding site.
  • the torch may further include a fume gas extraction port adapted to receive fume gas from an area surrounding the welding site.
  • the fume gas extraction port is ideally positioned radially intermediate (a) the shield gas port (if present) or the high energy beam and (b) the shroud gas port.
  • the inner sleeve and the body or barrel of the torch define therebetween an extraction passage for fume gas extraction.
  • the fume gas extraction port is disposed at the distal end of the extraction passage.
  • the shroud gas port (and the shield gas port if present) are concentrically coaxially located at spaced relationship about the high energy beam.
  • the present invention provides a method for extracting fume gas from a welding site wherein heat is delivered to the welding site from a high energy beam, the method comprising: producing a shroud gas curtain spaced radially outward from the high energy beam and extracting fume gas from a position radially intermediate the high energy beam and the shroud gas curtain, wherein the shroud gas curtain comprises a radially outward component of velocity.
  • the Applicants have found that by introducing a radially outward component of velocity to the shroud gas, together with the extraction port described above, the wall jet flow is substantially contained and the direction of flow along the face of the work being welded is radially inwards, whereas, in the absence of the additional shroud gas port and the shrouding gas this flow (the 'wall jet') continues in a radially outward direction.
  • the shroud gas curtain isolates the fume generation region from the surroundings and allows the fume gas to be extracted from within the envelope. As a consequence, fume extraction via the fume gas extraction port may be obtained.
  • the shroud gas port is preferably circular in transverse cross-section. However, this type of arrangement is not critical to the design or functionality of the port, for example a port that is annular in transverse cross-section may be possible.
  • One or more of the shield gas port (if present), shroud gas port and fume gas extraction port (if present) may optionally include a plurality of sub-ports.
  • the apparatus may also include control means to control the flow rates of the shroud gas, the shield gas (if present), and the rate of fume gas extraction (if being extracted).
  • the shroud gas and shield gas are preferably chosen from the group consisting of: nitrogen, helium, argon, carbon dioxide or compounds and mixtures thereof. However, it will be appreciated that any commercially available gas may be used for the shroud gas. In some circumstances, where a shield gas is also employed, compressed air may be used for the shroud gas.
  • the shield gas flow rate may be about 5 to 50 1/min and the shroud gas flow rate about 1 to 50 1/min.
  • the fume is preferably extracted from a location intermediate the high energy beam or shield gas curtain and the shroud gas curtain at a flow rate of between about 5 to 50 1/min.
  • the ratio of shroud gas flow rate:shield gas flow rate is chosen to be about 2: 1 to about 3:1.
  • the ratio of fume gas extraction rate:shield gas flow rate is about 1:1.
  • the shroud gas and shield gas are typically supplied at room temperature, although this temperature is not critical. However, in one embodiment the shroud gas and/or the shield gas are cooled sufficiently to promote fume gas condensation. Cooling may be achieved by refrigeration of the shroud/shield gas or adiabatic expansion of the shroud/shield gas exiting the shroud/shield gas port. However, as will be appreciated any method of gas cooling would be suitable. It will be appreciated that cooling assists condensation of the metal vapour to a fine particulate material thereby allowing improved extraction efficiency. Furthermore, cooling the shroud/shield gas(s) advantageously reduces the temperature of the exhausted gas. In other embodiments at least a portion of the shroud gas and/or the shield gas includes a component reactive with a welding fume gas and/or a UV light-absorbing component.
  • the shield gas may be deliberately chosen to have a high ionisation potential (e.g. Helium) in order to reduce plasma formation.
  • a high ionisation potential e.g. Helium
  • the shroud gas of the present invention may improve the quality of the helium shield.
  • the shroud gas may comprise a high ionisation potential gas and the geometry and flow rates may be adjusted to enhance rather than contain the wall jet effect in order to control/disperse the plasma.
  • at least the shroud gas port is axially adjustable relative to the shield gas port for allowing the welding operator to fine-tune the fume extraction efficiency.
  • Figure 1 is a sectional side view of an electron beam welding torch according to a first embodiment of the invention
  • Figure 2 is a sectional side view of a laser beam welding torch according to a second embodiment of the invention.
  • Figure 3 is a view similar to Figure 2 but configured to include a shield gas port in accordance with a third embodiment of the invention.
  • welding site and “welding zone” may be used interchangeably herein, and the terms “fume” and “fume gas” are also used interchangeably herein. Fume gas is intended to not only refer to the gaseous products emanating from the welding process but also the fine particular matter which is also produced, such as metal dust.
  • welding as discussed herein also includes “hard surfacing”, which is a process in which weld metal is deposited to repair a surface defect rather than to join two pieces of metal together.
  • a welding torch 1 which includes a heat source in the form of a high energy beam in the form of an electron beam 2.
  • a cathode is provided in the form of a negatively charged filament 3 which, when heated up to its thermionic emission temperature emits the electron beam 2.
  • the electron beam 2 is accelerated by the electric field between a negatively charged bias electrode 4 and the anode 5.
  • the electron beam 2 passes through an aperture 6 in the anode 5 and is focused by an electromagnetic coil 7 to a point at the workpiece surface 9 to define the weld 8.
  • the beam currents and the accelerating voltages employed for typical electron beam welding vary over the ranges of 50 to 1000 mA and 30 to 175 kV, respectively.
  • a welding torch 10 is shown in Figures 2 and 3 wherein the high energy beam is a laser beam 11.
  • the laser beam 11 can be produced either by a solid-state laser or a gas laser 12. In either case, the laser beam 11 can be focused and directed by optical means 13 to a point at the workpiece surface 9 to define the weld 8.
  • the power level of solid- state lasers is typically about 3 to 5kW.
  • an inner sleeve 14 and an outer sleeve 15 are provided and spaced radially outward from the high energy beam 2, 11 to define therebetween a passage for a shroud gas 16.
  • the passage terminates in a shroud gas port 17 which is adapted to direct the exiting shroud gas 16 in a substantially radially outward direction thereby forming an "aerodynamic flange" or shroud gas "curtain” about the weld 8.
  • the shroud gas port 17 may be angled between about 45 and 90° relative to the longitudinal axis of the torch 1, 10. However, in preferred embodiments is angled at 90° relative to the longitudinal axis of the torch 1, 10.
  • the inner sleeve 14 outer the sleeve 15 circumscribe the high energy beam 2, 11.
  • the shroud gas port 17 includes an upstream shroud gas inlet 18, which is adapted for attachment to a suitable source of shroud gas.
  • the illustrated electron beam welding torch 1 and laser beam welding torch 10 include a fume gas extraction port 19 adapted to receive a fume gas from an area surrounding the weld 8.
  • the fume gas extraction port 19 is positioned radially intermediate the high energy beam 2, 11 and the shroud gas port 17 and the fume gas extraction port 19 communicates with a passage defined between a body or barrel 20 of the torch 1, 10 and the inner sleeve 14.
  • the fume gas may be extracted through the fume gas extraction port 19 by connecting the port to a suitable extraction means such as a fan (not shown) by way of extraction outlet 21.
  • the torch 10 as shown in Figure 3 further includes a shield gas port 22 for passage of a shield gas 23.
  • the shield gas port 22 is spaced radially intermediate the high energy beam 2, 11 and the fume gas extraction port 19 and is adapted to direct an exiting shield gas 23 toward the weld 8.
  • the shield gas port 22 includes an upstream shield gas inlet (not shown), which is adapted for attachment to a suitable source of shield gas.
  • the electron beam welding torch 1 or the laser beam welding torch 10 is held at a distance above the surface of the work 9 to be welded. Accordingly, there is an appreciable separation between the shroud gas curtain 16 and the "wall jet" that is formed as the fume gas travels along the workpiece surface 9.
  • the shroud gas curtain 16 itself is not a source of welding fume, rather, the applicants have found that it reduces the tendency of the welding operation to eject any fume which may be generated into regions of the surrounding environment remote from the point of the weld 8.
  • the illustrated arc welding torches 1, 10 substantially alter the structure of the flow in the "wall jet", wherein the wall jet flow direction is now reversed in comparison to known torches which do not employ a shroud gas 16 and fume gas extraction.
  • the welding fume and optional shielding gas forms a wall jet which travels radially outward along the surface of the work. In consequence, some welding fume tends to escape along the surface of the work.
  • the illustrated welding torches 1, 10 act to confine fume gas which may be generated in the immediate vicinity of the weld 8, from where it can be efficiently extracted through the fume gas extraction port 19, if so desired.
  • the shielding efficiency of any shielding gas 23 is improved.
  • the arrows in the figures that represent gas flow present simplified versions of the gas flow regimes and do not illustrate the wall jet.
  • the shroud gas 16 may be cooled sufficiently to promote fume condensation. Such cooling may be achieved by refrigeration of the shroud gas 16 or adiabatic expansion of shroud gas 16 as it exits the shroud gas port 17. However, as will be appreciated any method of gas cooling would be suitable.
  • a portion of the shroud gas 16 may also include a component reactive with a welding fume and/or include a UV light-absorbing component.
  • the shield gas 23 may be similarly cooled and may also have a component reactive with a welding fume and/or include a UV light-absorbing component.
  • the shroud gas 16 is preferably chosen from the group consisting of: nitrogen, helium, argon, carbon dioxide or compounds and mixtures thereof.
  • the flow rate of the shroud gas 16 is typically between about 1 to 50 L/min.
  • the shield gas 23 may be similarly chosen from these gases and may have a similar flow rate to the shroud gas 16.
  • the fume gas is typically extracted at a flow rate of between about 5 to 50 L/min.
  • the invention includes a method of extracting fume from a weld 8.
  • the welding steps comprise firstly delivering heat to a weld 8 from an electron beam 2 or a laser beam 11 and then producing a shroud gas curtain 16 spaced radially outward from the electron beam 2 or a laser beam 11 and directed in a substantially radially outward direction. Fume gas is then extracted via fume gas extraction port 19 from a position radially intermediate the electron beam 2 or a laser beam 1 land the shroud gas port 17.
  • Control means (not shown) are used to control the flow rate of gas to the shroud gas port 17 and, if present, the shield gas port 22, and the extraction rate through fume gas extraction port 19.
  • the rate of fume gas extraction should be selected such that there is minimal disruption to the weld and such that excessive quantities of ambient air are not drawn into the welding arc or plasma at the vicinity of the weld.
  • the precise axial distance or "stand off' between the welding torch 1, 10 and the work 9 being welded may be selected so as to optimise fume extraction.
  • the illustrated welding torches are used in welding operations where the torch is vertical and the work piece horizontal, i.e. where the torch is normal to the work piece. However, it will be appreciated that the illustrated welding torches will substantially extract fume when held at angles other than normal to the work piece.
  • the shroud gas port 17 may be axially adjustable in order for the welding operator to fine tune the torch to maximise fume extraction.
  • one or more of the shield gas port 6, shroud gas port 17 and fume gas extraction ports 22 may include a plurality of sub-ports (not shown).
  • the illustrated apparatus for welding improves shielding of the weld pool from atmospheric contamination, and provides relatively improved fume extraction efficiency when fume is extracted from the vicinity of the weld zone.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Laser Beam Processing (AREA)

Abstract

La présente invention concerne une torche (1) pour souder et un procédé consistant à extraire un gaz de fumée depuis un site (8) de soudage. La torche (1) comprend un faisceau (2) de haute énergie pour fournir de la chaleur sur un site (8) de soudage, et au moins un orifice (17) de gaz d'enveloppement espacé radialement vers l'extérieur depuis le faisceau (2) de haute énergie et adapté pour transmettre à un gaz (16) d'enveloppement de sortie un composant de vitesse s'étendant radialement vers l'extérieur. Le gaz de fumée est extrait de préférence depuis une position radialement intermédiaire au faisceau (2) de haute énergie et au rideau (16) de gaz d'enveloppement.
PCT/AU2007/001937 2006-12-15 2007-12-14 Appareil et procédé de soudage WO2008070930A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2006907022A AU2006907022A0 (en) 2006-12-15 Apparatus and method for welding with improved shielding II
AU2006907022 2006-12-15

Publications (1)

Publication Number Publication Date
WO2008070930A1 true WO2008070930A1 (fr) 2008-06-19

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ID=39511166

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2007/001937 WO2008070930A1 (fr) 2006-12-15 2007-12-14 Appareil et procédé de soudage

Country Status (1)

Country Link
WO (1) WO2008070930A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466254A (en) * 2008-12-17 2010-06-23 Boc Group Ltd Welding torch fume retention by outwardly dispersed gas and through-torch fume extraction.
EP2283962A1 (fr) 2009-08-14 2011-02-16 Linde AG Soudage laser avec consommation réduite d'hélium
WO2014026290A1 (fr) * 2012-08-16 2014-02-20 Alter Nrg Corp. Buse d'alimentation à plasma
JP2020059030A (ja) * 2018-10-05 2020-04-16 株式会社アフレアー 気体供給吸引装置、吸引装置およびレーザ処理装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU979052A1 (ru) * 1979-08-03 1982-12-07 Предприятие П/Я Г-4780 Горелка дл дуговой сварки в защитных газах
SU1402414A1 (ru) * 1986-06-23 1988-06-15 Институт Электросварки Им.Е.О.Патона Горелка дл дуговой сварки в защитных газах
US5393949A (en) * 1994-01-21 1995-02-28 Precision Welding Technologies, Inc. Gas shielding apparatus for welding
JPH0810953A (ja) * 1994-06-23 1996-01-16 Mitsubishi Heavy Ind Ltd ガスアーク溶接トーチ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU979052A1 (ru) * 1979-08-03 1982-12-07 Предприятие П/Я Г-4780 Горелка дл дуговой сварки в защитных газах
SU1402414A1 (ru) * 1986-06-23 1988-06-15 Институт Электросварки Им.Е.О.Патона Горелка дл дуговой сварки в защитных газах
US5393949A (en) * 1994-01-21 1995-02-28 Precision Welding Technologies, Inc. Gas shielding apparatus for welding
JPH0810953A (ja) * 1994-06-23 1996-01-16 Mitsubishi Heavy Ind Ltd ガスアーク溶接トーチ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 198340, Derwent World Patents Index; Class P55, AN 1983-781566 *
DATABASE WPI Week 198901, Derwent World Patents Index; Class P55, AN 1989-005838 *
DATABASE WPI Week 199612, Derwent World Patents Index; Class M23, AN 1996-111158 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466254A (en) * 2008-12-17 2010-06-23 Boc Group Ltd Welding torch fume retention by outwardly dispersed gas and through-torch fume extraction.
GB2466254B (en) * 2008-12-17 2012-08-15 Boc Group Ltd Welding torch with a through-torch fume extraction passage
EP2283962A1 (fr) 2009-08-14 2011-02-16 Linde AG Soudage laser avec consommation réduite d'hélium
WO2014026290A1 (fr) * 2012-08-16 2014-02-20 Alter Nrg Corp. Buse d'alimentation à plasma
US9095829B2 (en) 2012-08-16 2015-08-04 Alter Nrg Corp. Plasma fired feed nozzle
JP2020059030A (ja) * 2018-10-05 2020-04-16 株式会社アフレアー 気体供給吸引装置、吸引装置およびレーザ処理装置
JP7210001B2 (ja) 2018-10-05 2023-01-23 株式会社アフレアー 気体供給吸引装置およびレーザ処理装置

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