WO2008064995A1 - Brûleur de soudage pour le soudage sous gaz protecteur - Google Patents

Brûleur de soudage pour le soudage sous gaz protecteur Download PDF

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Publication number
WO2008064995A1
WO2008064995A1 PCT/EP2007/062254 EP2007062254W WO2008064995A1 WO 2008064995 A1 WO2008064995 A1 WO 2008064995A1 EP 2007062254 W EP2007062254 W EP 2007062254W WO 2008064995 A1 WO2008064995 A1 WO 2008064995A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
welding
valve
gas supply
supply line
Prior art date
Application number
PCT/EP2007/062254
Other languages
German (de)
English (en)
Inventor
Bernd Hildebrandt
Achim Wankum
Original Assignee
Messer Group Gmbh
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
Application filed by Messer Group Gmbh filed Critical Messer Group Gmbh
Priority to EP07822528A priority Critical patent/EP2097206A1/fr
Priority to CN2007800393494A priority patent/CN101528405B/zh
Publication of WO2008064995A1 publication Critical patent/WO2008064995A1/fr

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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
    • B23K9/24—Features related to electrodes
    • B23K9/28—Supporting devices for electrodes
    • B23K9/29—Supporting devices adapted for making use of shielding means
    • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
    • B23K9/295—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-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
    • 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

Definitions

  • the invention relates to an apparatus for inert gas welding, comprising a tubular burner body, which comprises a gas supply section, in which a gas supply and a shaft adjoining the gas supply section and with a shaft arranged on the body of the burner body with a contact tip for a welding wire and a Gas nozzle for a protective gas, wherein the welding wire is guided in a soul through the burner body to the contact tip and an inert gas is passed from the gas supply to the gas nozzle in the nozzle.
  • Such devices are known for example as inert gas welding apparatuses according to DIN 1910 and are used in particular in metal inert gas welding (MIG) metal-active gas welding (MAG) or TIG (tungsten inert gas welding). These nozzles are provided at the mouth side with a usually arranged concentrically around the actual welding nozzle protective gas nozzle. By inert gas or inert gas or active gas is introduced into the work area and there ensures the formation of a protective gas bell on the surface of the workpiece to be machined.
  • the protective gas nozzle of the nozzle block is connected via a supply line with a protective gas source, for example a compressed gas container, in flow communication, in which the corresponding protective gas is stored.
  • a protective gas source for example a compressed gas container
  • the control of the protective gas flow through the supply line is usually carried out by means of a shut-off, usually a solenoid valve, which is usually arranged - in some distance from the nozzle - in the so-called wire feed box.
  • a shut-off usually a solenoid valve
  • the protective gas flow is opened or closed;
  • a pre-flow and / or a post-flow time is additionally provided, in which protective gas is supplied to the workpiece surface before or after completion of the welding work. This is to ensure a homogeneous protective gas bell during the duration of welding.
  • DE 297 08 396 U1 proposes, in addition to the obturator, to provide a metering nozzle in the form of a throttle valve in the inert gas line, which is usually arranged in the power source and / or wire feed unit of the welding apparatus.
  • This Zumessdüse is connected via a flow control device with a pressure measuring device on the shut-off, and throttles the influx of the protective gas, the stronger, the higher the pressure on the shut-off.
  • the welding apparatuses according to the prior art have in common that there is an often several meters long gas supply line between the solenoid valve, which regulates the welding gas flow, and the welding torch.
  • this gas supply line and in the interior of the burner body itself can enter during work breaks undesirable foreign substances such as moisture, atmospheric oxygen or nitrogen. These foreign substances affect the re-commissioning of the welding apparatus, the composition of the protective gas bell on the workpiece and thus lead in particular in gas-sensitive materials, in particular aluminum or aluminum alloys, to significant deterioration of the welding result.
  • the object of the invention is therefore to provide a protective gas welding apparatus, which allows the formation of a protective gas bell, which is also immediately after breaks substantially free of foreign substances such as moisture, atmospheric oxygen or nitrogen.
  • This object is achieved with a device of the type and purpose specified in that extends between gas supply and gas nozzle through the interior of the burner body through a protective gas line, in which a blocking valve for the protective gas is arranged.
  • a separate line for the inert gas is arranged in the interior of the burner body and / or the nozzle block in a blocking valve.
  • the blocking valve By means of the blocking valve, the inert gas line is blocked at the beginning of a break and thus prevents the ingress of air or moisture.
  • the blocking valve is protected inside the burner on the one hand, on the other hand, it does not hinder the desired flexibility of the gas supply line.
  • the blocking valve may be a magnetically, electrically or pneumatically operated element.
  • the blocking valve in the nozzle or in the shaft of the burner body is arranged to lock the inert gas as completely as possible against the ingress of air or moisture.
  • the protective gas line is at least partially formed as a substantially concentric around the soul of the welding wire arranged ring line, in which the blocking valve is arranged.
  • the blocking valve is thus designed as a ring valve and can be integrated, for example, in the gas nozzle of the nozzle block.
  • a check valve or a pressure-holding valve is provided as a blocking fitting.
  • a check valve any current is prevented against the intended flow direction of the protective gas.
  • the blocking valve locks below a predetermined one Minimum overpressure inside the inert gas line in relation to the
  • the pressure-holding valve is designed such that in the protective gas supply a minimum pressure of 0.2 bar compared to the ambient pressure is ensured.
  • the pressure holding valve can also be designed so that any overpressure can be adjusted freely.
  • Fig. 1 The front portion of a device according to the invention for
  • Fig. 2 The nozzle head of another embodiment of a device according to the invention.
  • the device 1 shown in FIG. 1 is a welding torch for MIG / MAG welding.
  • the device 1 comprises a burner body 2 with a gas supply section 3 and a neck 4, on which a nozzle head 5 is arranged.
  • a gas supply line 6 opens into the burner body 2, through which a protective gas is introduced from a protective gas source (not shown here) into the interior of the tubular burner body 2.
  • the metering of the protective gas to the gas supply line 6 by means of a solenoid valve, which in known and not here is shown in a so-called pressure feed box, which is usually located a few meters away from the working area of the device 1.
  • the gas supply line 6 has a length of a few meters.
  • the device 1 passes through the interior of the burner body 2 through - approximately centrally - a welding electrode 7, which is guided in a wire guide core 8.
  • the device 1 is a hand-held device, and the gas supply section 3 also comprises a handle 9.
  • the gas supply section essentially comprises a connection for connecting the gas supply line 6.
  • the nozzle head 5 comprises a centrally arranged welding electrode 7 encompassing contact tip 11, which in turn is received in a concentrically arranged around the contact tip 11 gas diffuser 12.
  • the gas diffuser 12 is fluidly connected via a gas inlet 13 to the interior of the burner shaft 4, but otherwise gas-tight with respect to this completed.
  • a cylindrical sleeve 14 Separated by an annular gap from the gas diffuser 12 is a cylindrical sleeve 14 which, in cooperation with the gas diffuser 12, is intended to divert the protective gas flowing out of the lateral flow openings 16 of the gas diffuser 12 in the direction of the working area located in front of the mouth 17 of the nozzle head.
  • the existing between the sleeve 14 and gas diffuser 12 annular gap is completed gas-tight relative to the interior of the burner shaft 4.
  • a protective gas line 19 is arranged, through which the protective gas is passed to the gas diffuser 12, without penetrating into the remaining interior of the burner body 2.
  • a blocking element 20 is arranged in the region of the burner shaft 4.
  • this blocking element is a pneumatically, electrically or magnetically operated pressure-maintaining valve which, when the pressure in the vicinity of the device 1 falls below a certain limit overpressure in the inert gas line 19, passes through the flow path the protective gas line automatically locks, but when the limit pressure exceeds this releases again.
  • the magnetic valve arranged in the wire feed case is first opened and the gas feed line 6 is flooded with protective gas. If the limit overpressure, for example 0.2 bar above ambient pressure, is reached, the blocking element 19 opens and the protective gas flows into the working area via the gas diffuser 12 and the mouth 17 of the nozzle head 5. After completion of work or during a break in operation, the gas flow is stopped by locking the solenoid valve in the wire feed box. The pressure in the inert gas 19 gradually decreases. If the limit overpressure is reached, the blocking element 20 locks. In the protective gas line 19, a sustained overpressure of, for example, 0.2 bar is maintained. An intrusion of ambient air or moisture in the protective gas line 19 or in the gas supply line 6 is thus not possible.
  • the limit overpressure for example 0.2 bar above ambient pressure
  • protective gas from the gas supply line 6 again flows into the protective gas line 19, as a result of which the limit overpressure is exceeded. Since the protective gas is already present in the protective gas line 19 with overpressure, it is very fast to build a protective gas bell homogeneously composed of inert gas in the work area. A small amount of air and moisture, which have accumulated in the region of the mouth 17 of the nozzle block 5, are quickly and reliably displaced by the protective gas. A longer-lasting flushing of the protective gas line 19 and the gas supply line 6 is thus unnecessary, the actual welding work can be resumed very quickly.
  • the blocking element is arranged in the region of the nozzle head 30 of a welding torch.
  • the nozzle head 30 comprises, in the same way as in the embodiment of FIG. 1, a contact tip 32 which engages around a welding electrode 31.
  • the contact tip 32 is received in a gas diffuser 33, which in turn, spaced by an annular gap, is radially surrounded by a sleeve 34.
  • the gas diffuser 33 is fluidly connected in the embodiment of FIG. 2 with the interior of the burner body 37, but may, similarly as in the embodiment of FIG. 1, also be connected to a separate inert gas line 19.
  • a - here only hinted - solenoid valve 35 is integrated.
  • the solenoid valve 35 serves in the same way as the blocking element 20 described above to block the flow of the protective gas in the direction of the mouth 36 of the nozzle head 30 falls below a certain limit overpressure and to prevent any gas flow in the direction of the burner body 37.
  • the separation between protective gas and ambient atmosphere takes place in the immediate vicinity of the mouth 36 of the nozzle head 30.
  • the amount of air or moisture that can accumulate in the case of a break in the flow of the protective gas is particularly low.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

En soudage MIG, MAG ou WIG, l'amenée de gaz protecteur au brûleur s'effectue par un conduit séparé et le débit de gaz protecteur est commandé par une soupape magnétique. Cette soupape magnétique est en général située dans un coffre dit d'avancement de fil. Entre le coffre d'avancement de fil et le tube de l'ajutage du brûleur, on trouve en général un conduit de gaz d'une longueur de quelques mètres dans lequel des substances étrangères telles que de l'air ou de l'humidité s'accumulent pendant les arrêts de travail et peuvent compromettre le résultat du soudage, en particulier lorsque l'on utilise des matériaux sensibles au gaz, en particulier l'aluminium ou des alliages d'aluminium. L'invention propose un nouveau brûleur de soudage destiné au soudage sous gaz protecteur dans lequel un conduit (19) de gaz protecteur à vanne de blocage (20, 35) est disposé dans le tube d'ajutage (5, 30) ou dans la tige (4) du brûleur. La vanne de blocage est de préférence une soupape anti-retour ou une soupape de retenue de pression qui garantit que le gaz protecteur présente dans le conduit de gaz protecteur une surpression prédéfinie par rapport à l'atmosphère ambiante. La barrière à l'écoulement disposée immédiatement en amont de la sortie du gaz sur le tube d'ajutage permet d'éviter de manière sûre que des substances étrangères s'accumulent à l'intérieur du conduit de gaz protecteur.
PCT/EP2007/062254 2006-11-28 2007-11-13 Brûleur de soudage pour le soudage sous gaz protecteur WO2008064995A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07822528A EP2097206A1 (fr) 2006-11-28 2007-11-13 Brûleur de soudage pour le soudage sous gaz protecteur
CN2007800393494A CN101528405B (zh) 2006-11-28 2007-11-13 保护气体焊接的焊炬

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610056047 DE102006056047A1 (de) 2006-11-28 2006-11-28 Schweißbrenner zum Schutzgasschweißen
DE102006056047.7 2006-11-28

Publications (1)

Publication Number Publication Date
WO2008064995A1 true WO2008064995A1 (fr) 2008-06-05

Family

ID=39156708

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/062254 WO2008064995A1 (fr) 2006-11-28 2007-11-13 Brûleur de soudage pour le soudage sous gaz protecteur

Country Status (4)

Country Link
EP (1) EP2097206A1 (fr)
CN (1) CN101528405B (fr)
DE (1) DE102006056047A1 (fr)
WO (1) WO2008064995A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202016103382U1 (de) 2016-06-27 2016-07-13 Cisma Solutions Aps Schweißvorrichtung sowie eine durch die Schweißvorrichtung bearbeitete Endrohrblende
CN107984059A (zh) * 2017-11-16 2018-05-04 西南交通大学 一种无填充的高电导率无氧纯铜焊接装置及焊接方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130109A1 (de) * 1990-09-18 1992-03-19 Fronius Schweissmasch Schweissstromquelle fuer das mig/mag bzw. tig-schweissen
DE29708396U1 (de) * 1996-05-24 1997-08-28 Hoffmann, Hans, Ing., Salzburg Schutzgas-Schweißvorrichtung
EP1537936A1 (fr) * 2003-12-05 2005-06-08 K.B. Schweissmaschinen Vermietung und Vertrieb GmbH Dispositif de soudage à l'arc sous gaz de protection avec une dispositif de sécurité de débordement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7113984U (de) * 1971-04-10 1971-12-16 Sewing K Schweißpistole für das Schutzgasschweißen
CN2101551U (zh) * 1991-10-29 1992-04-15 温铁流 自冷式二氧化碳气体保护焊枪
JP2000312972A (ja) * 1999-04-26 2000-11-14 Honda Motor Co Ltd 溶極式ガスシールドアーク溶接用トーチ
DE10200942A1 (de) * 2002-01-12 2003-07-17 Daimler Chrysler Ag Schweissbrenner
CN2654268Y (zh) * 2003-09-20 2004-11-10 大连理工大学 新型焊枪喷嘴
DE202004003178U1 (de) * 2004-03-02 2004-05-19 KRÜGER, Ralf Schutzgasausströmsicherung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130109A1 (de) * 1990-09-18 1992-03-19 Fronius Schweissmasch Schweissstromquelle fuer das mig/mag bzw. tig-schweissen
DE29708396U1 (de) * 1996-05-24 1997-08-28 Hoffmann, Hans, Ing., Salzburg Schutzgas-Schweißvorrichtung
EP1537936A1 (fr) * 2003-12-05 2005-06-08 K.B. Schweissmaschinen Vermietung und Vertrieb GmbH Dispositif de soudage à l'arc sous gaz de protection avec une dispositif de sécurité de débordement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2097206A1 *

Also Published As

Publication number Publication date
EP2097206A1 (fr) 2009-09-09
CN101528405B (zh) 2012-07-18
CN101528405A (zh) 2009-09-09
DE102006056047A1 (de) 2008-05-29

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