EP4334072A1 - Buse de gaz d'extraction/protecteur combinée d'un chalumeau de soudage à l'arc comportant une électrode consommable et un col de chalumeau comprenant une buse de gaz d'extraction/protecteur combinée - Google Patents

Buse de gaz d'extraction/protecteur combinée d'un chalumeau de soudage à l'arc comportant une électrode consommable et un col de chalumeau comprenant une buse de gaz d'extraction/protecteur combinée

Info

Publication number
EP4334072A1
EP4334072A1 EP22713668.6A EP22713668A EP4334072A1 EP 4334072 A1 EP4334072 A1 EP 4334072A1 EP 22713668 A EP22713668 A EP 22713668A EP 4334072 A1 EP4334072 A1 EP 4334072A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
suction
protective gas
torch
channel
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP22713668.6A
Other languages
German (de)
English (en)
Inventor
Jannik MUZICA
Sascha Rose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alexander Binzel Schweisstechnik GmbH and Co KG
Original Assignee
Alexander Binzel Schweisstechnik GmbH and Co KG
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 Alexander Binzel Schweisstechnik GmbH and Co KG filed Critical Alexander Binzel Schweisstechnik GmbH and Co KG
Publication of EP4334072A1 publication Critical patent/EP4334072A1/fr
Pending legal-status Critical Current

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
    • 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
    • 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
    • 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
    • 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
    • B23K9/293—Supporting devices adapted for making use of shielding means the shielding means being a gas using consumable electrode-rod
    • 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
    • B23K9/32—Accessories
    • B23K9/325—Devices for supplying or evacuating shielding gas

Definitions

  • the invention relates to a combined suction and protective gas nozzle of an arc welding torch with a consumable electrode according to the preamble of claim 1 and a torch neck for thermally joining at least one workpiece, in particular for arc welding, according to the preamble of claim 16.
  • Thermal arc joining processes use energy to melt the workpieces and join them.
  • MIG Metal arc melting
  • MAG Magnetic arc joining
  • TOG Thermal arc joining
  • MAG gas-shielded arc welding processes with consumable electrodes
  • MIG metal inert gas
  • MAG metal active gas
  • TSG tungsten inert gas
  • MAG welding is a gas metal arc welding (MAG) process with active gas, in which the arc burns between a continuously fed, consumable wire electrode and the material.
  • the consumable electrode supplies the filler metal to form the weld seam.
  • MAG welding can be used easily and economically with almost all weldable materials. Depending on Different protective gases are used depending on the requirements and the material.
  • the active gas supplied protects the electrode, the arc and the weld pool from the atmosphere. This ensures good welding results with high deposition rates under a wide variety of conditions.
  • a gas mixture of argon C02, argon 02 or pure argon or pure C02 is used as the protective gas.
  • different wire electrodes are used.
  • MAG welding is a robust, economical and versatile welding process that is suitable for manual, mechanical and automated processes.
  • MAG welding is suitable for welding unalloyed or low-alloy steels.
  • high-alloy steels and nickel-based alloys can also be welded using the MAG process.
  • the 02 or C02 content in the shielding gas is low.
  • different arc types and welding processes such as the standard or pulsed process are used.
  • Arc welding devices generate an arc between the workpiece and a consumable or non-consumable welding electrode to melt the weld metal.
  • the weld metal and the welding point are shielded from the atmospheric gases, mainly N2, O2, H2, of the ambient air by a flow of protective gas.
  • the torch neck usually contains a group of internal weld current-carrying components that carry the weld current from a welding power source in the arc welder to the tip of the welder Torch head to the welding electrode in order to then generate the arc from there to the workpiece.
  • the flow of shielding gas flows around the welding electrode, the arc, the weld pool and the heat-affected zone on the workpiece and is fed to these areas via the torch neck of the welding torch.
  • a gas nozzle directs the flow of shielding gas to the front end of the torch, where the flow of shielding gas exits the torch head in a roughly annular shape around the welding electrode.
  • the gas is generally routed to the gas nozzle via components made of a material with low electrical conductivity (polymers or oxide ceramics), which can also serve as insulation.
  • the arc generated for welding heats the workpiece to be welded and any weld metal that is fed in, so that these are melted.
  • the arc energy input, the high-energy thermal radiation and convection result in a significant heat input into the torch head of the welding torch.
  • Part of the heat introduced can be dissipated again by the protective gas flow conducted through the torch head or by the passive cooling in the ambient air and the heat conduction into the hose package.
  • the torch head is actively cooled with a coolant that flows through the torch head and removes the unwanted heat absorbed from the welding process.
  • a coolant for example Deionized water with added ethanol or propanol can be used for antifreeze purposes.
  • soldering can also be used to join sheet metal components. In contrast to welding, it is not the workpiece that is melted, only the filler material. The reason for this is that when soldering, two edges are connected to each other using the solder as an additional material. The melting temperatures of the solder material and the component materials are far apart, which is why only the solder melts during processing.
  • Argon 11 or Ar mixtures with admixtures of C02, O2 or H2 according to DIN ISO 14175 can usually be used for arc brazing.
  • MSG arc soldering is largely identical in terms of equipment to MSG welding with wire-shaped filler material.
  • EP 2 407 267 B1 and EP 2 407 268 B1 disclose a welding torch with a protective gas feed, a torch connection block, a torch neck adjoining the torch connection block at one end and a torch head provided at the other end of the torch neck, the torch neck having an inner tube, an outer tube and an insulating tube provided between the inner tube and the outer tube.
  • Such welding torches are used in the prior art, inter alia, for metal inert gas welding (MIG).
  • MIG metal inert gas welding
  • Such a welding torch is described in publication DE 10 2004 008 609 A1, for example.
  • the welding current is fed to the welding wire in the inner tube via the contact nozzle.
  • the outer parts of the burner are electrically isolated from the inner tube to a Prevent welding currents from flowing through the torch body.
  • the welding wire is heated and some of the heat is conducted into the welding torch.
  • the protective gas that is used in any case in the welding process can be used as effectively as possible to cool the inner pipe. Effective cooling of the inner tube can be achieved if the gas flows in shallow channels along the outside of the inner tube.
  • a casing tube is used on the inner tube in the prior art. The combination of inner tube and jacket tube is then insulated from an outer housing tube by an insulating tube.
  • the inert gas is initially supplied through the inert gas feed, which is typically designed in the form of a bore in the burner connection block. Since the protective gas can be supplied asymmetrically to the inner tube, the protective gas should be distributed as evenly as possible around the inner tube.
  • the outer ring channel be formed inside the burner connection block and around the inner tube, through which the protective gas can be distributed around the inner tube. The protective gas thus flows from the hole in the burner connection block via the outer ring channel and the radial gas channels to the space between the inner tube and the insulating tube or possibly also to the space between the insulating tube and the outer tube.
  • Torches with suction devices are provided to capture the fumes and pollutants produced during welding as close as possible to the point of origin, ie to the welding process.
  • EP 2 298 485 A1 discloses a burner with a suction housing which encloses the burner neck in a relatively short section.
  • a suction hose is connected to the suction housing and is routed parallel to the remaining section of the torch neck and to the handle with the torch hose package.
  • EP 0 835 71 1 A2 relates to a welding torch with a suction pipe which encloses the torch neck and forms a flue gas channel in the intermediate space.
  • the suction pipe merges into a suction nozzle in the front area.
  • the flue gas is extracted directly at the welding point.
  • the extraction pipe is firmly connected to the torch neck by means of a triple bridge and a union nut.
  • the suction tube opens into a suction hose that is guided outside next to the handle of the torch in the manner of a bypass.
  • An electric welding torch with a fume extraction device is known from EP 3 804 898 A1.
  • WO 2009/050 637 A1 relates to a welding torch.
  • the welding fumes are sucked into several fume extraction openings and discharged through the torch cable.
  • a welding torch with a smoke gas sensor is known from EP 2 561 944 A1.
  • AT 413 668 B relates to a gas nozzle for a welding torch, which consists of copper or a copper alloy, and a welding torch which has a gas nozzle, a nozzle assembly and a contact tube, the gas nozzle and/or the nozzle assembly and/or the contact tube made of copper or a copper alloy.
  • a disadvantage of the known device is that the handling of the burner is restricted by the suction device arranged on the burner head, since the smoke gas sucked off via the suction nozzle is routed via a separate bypass line parallel to the handle of the burner. In addition, the extracted volume flow is severely limited by the routing of the flue gas via this line running parallel to the torch neck.
  • welding can also take place without a suction nozzle, so that the harmful smoke gases and pollutants are consequently not suctioned off and can be inhaled by a user, which poses a major health risk.
  • the invention is based on the object of specifying an improved nozzle unit and an improved torch neck which have a reduced weight and size and ensure safe and simple operation.
  • the size and weight should differ as little as possible from a conventional welding torch.
  • the challenge in the construction of welding fume extraction torches is to be able to generate a sufficient extraction volume flow with a limited extraction capacity in order to achieve sufficient collection of the welding fumes and not adversely affect the flow of protective gas.
  • the invention relates to a combined suction and protective gas nozzle of an arc welding torch with a consumable electrode, such as a MIG torch, with a protective gas channel for supplying protective gas to the welding process and a suction device with at least one suction channel with a suction opening for sucking off the fumes or pollutants occurring during the welding process .
  • the protective gas channel and the at least one suction channel are offset radially and axially relative to one another such that the suction opening for the at least one suction channel lies behind the protective gas channel in the flow direction of the flue gas.
  • a suction protective gas nozzle for MIG torches that is as compact as possible is realized. Furthermore, an optimal fume extraction is implemented to protect welders and operators from welding fumes. Even in such a configuration, the harmful emissions are still extracted close enough to the point of origin, i.e. to the welding process, so that the welder and operator do not come into contact with the welding fumes.
  • the aim is in particular to achieve the induced speed of the suction flow according to EN ISO 21904-1, which describes a flow speed calculated from the volume flow at the virtual arc attachment at the end of the wire.
  • the suction openings of the suction device are arranged offset axially with respect to the nozzle longitudinal axis relative to the protective gas outlet of the nozzle.
  • the flue gas is guided via the combined suction and protective gas nozzle, but in contrast to the prior art, no changes to the burner head are required in the present case.
  • Leading the flue gas coaxially to the actual one Torch neck is easy to implement. It does not require a bypass, and most importantly, it does not require any modification of the torch neck itself.
  • This outward and less forward orientation is of particular importance for the extraction of ozone as a gaseous pollutant, which is induced by the arc radiation and only occurs at some distance from the process.
  • the invention creates a greater degree of freedom in that the suction section, i. H. the suction openings are arranged further back and directed outwards.
  • This solution is particularly suitable for limited currents of up to 300 A and correspondingly few directed arc currents to achieve very good extraction results.
  • a further advantage of the design according to the invention is that the extraction of the smoke gas and the supply of the protective gas take place one after the other in the direction of flow, i.e. protective gas flows out at the front end of the nozzle and, seen in the direction of smoke gas extraction, suction takes place behind it.
  • This largely prevents the protective gas from being heated by hot flue gases and the arrangement of the suction openings also prevents them from heating up on the hot protective gas nozzle surface, which can lead to increased temperatures in the torch, especially in the handle.
  • the invention proposes fastening the suction device to the handpiece of the burner. So while in the prior art the nozzle is fixed to the burner head the flue gas discharge arranged in the invention via the torch head and a guide on the torch neck in the handle and not via a separate bypass line. In the invention, the flue gas is guided from the nozzle on the torch head via the torch neck of the nozzle to the handle.
  • the protective gas duct and the suction duct are essentially aligned with their axes parallel to one another.
  • the flue gas therefore flows in the nozzle in the opposite direction to the shielding gas.
  • a particularly compact design of the nozzle is realized by this configuration.
  • the protective gas channel and the suction channel can preferably be arranged centrically to one another. This can be the case in particular when only a single suction channel is provided, which extends coaxially around the protective gas channel, so that the protective gas channel and the suction channel are aligned centrally to one another.
  • the suction device has a plurality of suction openings for the flue gas, preferably arranged uniformly distributed on the circumference of the burner neck.
  • the suction openings can be arranged at approximately the same distance from one another, with each suction opening being in fluid communication with the suction device via the suction channel. In this way, the flue gas is extracted evenly.
  • an even number of suction openings can be preferred in order to be able to manufacture the nozzle by molding.
  • the end of the protective gas channel on the burner side is connected via a shoulder to the at least one suction channel which is arranged offset radially and in the axial direction.
  • the protective gas channel is formed by a preferably approximately cylindrical nozzle section with an inner and outer surface, the protective gas being guided inside the nozzle section.
  • the end of the protective gas channel on the burner side in particular the outer surface of the nozzle section forming the protective gas channel, opens into the shoulder, which can preferably project outwards in relation to the nozzle section.
  • This shoulder is connected to the suction channel, with the suction openings being arranged in the region of the preferably sloping shoulder. Due to the sloping shoulder, the smoke gases and pollutants are extracted over a larger extraction area.
  • the suction opening or suction openings are not only directed in the direction of flow, but also in the direction to the side of the nozzle, so that as a result the suction area is enlarged, in particular compared to a non-slanted shoulder suction opening.
  • the extraction openings which are directed forwards and also outwards, are of particular importance for the extraction of ozone as a gaseous pollutant. Because the ozone is induced by the arc radiation only at some distance from the welding process. Overall, a greater degree of freedom is advantageously achieved in that the suction openings are arranged further to the rear and are directed outwards.
  • the end of the protective gas channel on the burner side can be connected in one piece to the suction channel via the shoulder.
  • the suction openings have an elliptical or oval-shaped cross section.
  • the suction openings extend over the sloping shoulder, it can be provided that the suction openings have an elliptical or oval-shaped cross section in relation to the surface of the shoulder. In this way, the extraction area for the smoke gases and pollutants is further increased, which is particularly relevant for gases such as ozone. Furthermore, the suction openings can be easily produced by drilling.
  • the nozzle has a threaded insert for screwing onto a torch neck. In this way, easy assembly and replacement of the nozzle on the burner is guaranteed.
  • electrical insulation in particular a spraying compound
  • the insulating compound can be processed by pressing, transfer molding and injection molding. Insulation made from phenolic molding compound filled with glass fibers and minerals is preferably used. This material offers very high mechanical stability in all directions with very good electrical insulation properties at the same time.
  • the threaded insert can be pressed into a receptacle of the nozzle; in particular, the threaded insert can be pressed into a spraying compound located in the receptacle of the nozzle for electrical insulation.
  • the assembly of the nozzle is further simplified.
  • the suction device with the suction channel and suction openings is detachably arranged on a partial element of the combined suction and protective gas nozzle , wherein the partial element has the protective gas channel with protective gas outlet openings.
  • the threaded insert for screwing onto the torch neck and/or the electrical insulation can also be provided in this partial element.
  • the partial element and the suction device are screwed together.
  • the partial element can have an external thread onto which the suction device can be screwed with a corresponding internal thread.
  • the suction protective gas nozzle at the front end in particular in the area of the protective gas outlet opening, has a receiving area for receiving, in particular for attaching or screwing on a wear cap, preferably that the receiving area has an external thread for screwing on the wear cap with a corresponding one Has internal thread.
  • This wear cap has the advantage that it can be manufactured in a geometrically very simple manner and therefore inexpensively.
  • the highest loads in relation to the arc-induced heat input and also spatter therefore act on this component and not on the more complex inert gas extraction nozzle.
  • the service life of the combined inert gas extraction nozzle can be at least one order of magnitude longer than the service life of the wear cap.
  • the geometry, preferably the length of the wear cap can be easily adjusted or a user can adjust this himself.
  • the suction device is made of aluminum, in particular an aluminum alloy, and/or the threaded insert is made of brass and/or the wear cap is made of copper.
  • the specific advantages of aluminum are its low density, good workability and good thermal conductivity.
  • the advantages of brass are its good thermal conductivity combined with high hardness, so that the thread does not wear out.
  • the advantages of copper lie in its very good thermal conductivity, which means that spatter adhesion is significantly reduced.
  • An independent idea of the invention relates to a torch neck for the thermal joining of at least one workpiece, in particular for arc welding, with a combined extraction and protective gas nozzle described above.
  • a suction pipe channel for suctioning off the smoke gas is in fluid connection with the suction device of the suction protective gas nozzle.
  • suction pipe duct is part of a handle for the burner, in particular that the handle is formed from two half-shells.
  • the invention relates to a torch with a torch neck as described above.
  • Figure 1 is a perspective view of a combined suction
  • Figure 2 is a sectional view of the nozzle according to Figure 1,
  • FIG. 3 shows a further sectional view of the nozzle according to FIG. 1,
  • Figure 4 is a perspective view of the combined suction
  • FIG. 5 shows a sectional view of the nozzle according to FIG. 4,
  • FIG. 6 shows a further sectional representation of the nozzle according to FIG. 4,
  • Figure 7 is a perspective view of part of a combined suction shield gas nozzle and wear cap torch
  • FIG. 8 shows a sectional view of the burner according to FIG.
  • FIG. 1 shows a combined suction and protective gas nozzle 10 for an arc welding torch with a consumable electrode, in particular a MIG torch.
  • This suction protective gas nozzle 10 is arranged on a torch neck 13 of a welding torch 15, not shown in FIG. especially screwed. Such a torch neck 13 is shown in FIGS.
  • the protective gas channel 1 is routed approximately centrally in the suction protective gas nozzle 10 .
  • the sectional view of the torch 15 with the torch neck 13 in Figure 8 shows a protective gas inlet channel 4 for introducing the protective gas through the torch neck 13 into the combined extraction and protective gas nozzle 10. There the protective gas enters the protective gas channel 1 from the protective gas inlet openings 16 and exits through the protective gas outlet opening 2 the nozzle 10 for the welding process.
  • the suction protective gas nozzle 10 has a suction device 3 for sucking off the fumes and pollutants occurring during the welding process.
  • a suction device 3 for sucking off the fumes and pollutants occurring during the welding process.
  • several suction openings 7 for the flue gas are provided, which are arranged evenly distributed around the circumference of the burner neck 13 .
  • These suction openings 7 are in fluid connection with at least one suction channel 6, as FIGS. 1 to 8 illustrate.
  • the suction device 3 has a plurality of suction channels 6 , each with a suction opening 7 , which are distributed uniformly around the circumference of the torch neck 13 .
  • a suction tube channel 14 for sucking off the smoke gas is fluidly connected to the suction device 3 of the protective gas nozzle 10 .
  • the suction openings 7 presently have an elliptical or oval-shaped cross section and the main axis of the elliptical or oval-shaped cross-section extends approximately parallel to the longitudinal axis 5 of the nozzle 10.
  • the protective gas channel 1 is formed by a preferably approximately cylindrical nozzle section with an inner and outer surface, the protective gas being guided inside the nozzle section.
  • the burner-side or rear end 9 of the protective gas channel 1, in particular the outer surface of the nozzle section forming the protective gas channel 1, opens into the shoulder 11, which can preferably project outwards relative to the nozzle section.
  • This shoulder 11 is connected to the suction channel 6, the suction openings 7 being arranged in the region of the shoulder 11, which runs at an angle in the present case.
  • These suction channels 6 with suction openings 7, which are directed forwards and also outwards, are of particular importance for the suction of ozone as a gaseous pollutant.
  • the end 9 of the protective gas channel 1 on the burner side can be connected in one piece to the suction channels 6 via the shoulder 11 .
  • the suction channels 6 with suction openings 7 of the suction device 3 are arranged axially offset relative to the nozzle longitudinal axis 5 with respect to the protective gas outlet opening 2 of the nozzle 10 .
  • the protective gas channel 1 and the at least one suction channel 6 are offset from one another radially and in the axial direction such that the suction openings 7 for the suction channels 6 are behind the protective gas channel 1 in the flow direction of the flue gas.
  • the protective gas duct 1 and the suction ducts 6 are essentially aligned with their axes parallel to one another.
  • the suction openings 7 are set back relative to the gas outlet 2 for the protective gas in the flow direction of the flue gas and are offset radially outwards, so that these suction openings 7 are at a distance from the welding process.
  • the fumes or pollutants produced during the welding process are thus sucked into the suction channels 6 through the suction openings 7 .
  • This outward and less forward orientation is particularly important for the extraction of ozone as a gaseous pollutant that is induced by the arc radiation only at some distance from the process. Above all in aluminum applications, a high ozone concentration can arise due to the arc radiation even at low power levels.
  • the invention creates a greater degree of freedom in that the suction section, i.e. the suction openings 7, are arranged further back and directed outwards.
  • FIGS. 7 and 8 further illustrate that these smoke gases and pollutants are sucked off through a suction tube channel 14 arranged in a handle of the burner 15 .
  • FIGS. 8 A part of the welding torch 15 with a current contact nozzle 17 and a torch neck 13 with a combined suction and protective gas nozzle 10 can be seen from FIGS. It can be seen in particular from FIG. 8 that an extraction pipe channel 14 for extracting the smoke gas is fluidly connected to the extraction device 3 of the protective gas nozzle 10 .
  • the Suction pipe channel 14 is part of a handle for the burner 15, which in the present case is formed from two half-shells.
  • the nozzle 10 is arranged on the torch neck 13 for thermally joining at least one workpiece, in particular for arc welding.
  • the nozzle 10 in the present exemplary embodiment has a threaded insert 12 for screwing onto the torch neck 13 .
  • the threaded insert 12 is pressed into a pressing or spraying compound 20 located in the receptacle of the nozzle 10 for electrical insulation between the torch neck 13 and the nozzle 10, as can be seen from FIGS.
  • the insulation compound can be processed by pressing, transfer molding and injection molding. Insulation made from phenolic molding compound filled with glass fibers and minerals is preferably used.
  • the torch-side end 9 of the protective gas channel 1 is connected in one piece via the shoulder 11 to the suction channels 6, i.e. the use of the welding torch 15 is only possible in combination with the combined suction and protective gas nozzle 10 with the suction device 3.
  • the suction device 3 with the suction channels 6 and suction openings 7 is detachably arranged on a partial element of the combined suction and protective gas nozzle 10, the partial element having the protective gas channel 1 with protective gas outlet openings 2.
  • the threaded insert 12 for screwing onto the torch neck 13 and/or the electrical insulation 20 can also be provided in this partial element.
  • the partial element and the suction device 3 are screwed together.
  • Sub-element have an external thread onto which the suction device 3 can be screwed with a corresponding internal thread.
  • a receiving area for receiving a wear cap 19 is provided at the front end 8 of the nozzle 10 in the area of the protective gas outlet opening 2 .
  • This wear cap 19 can be pushed onto the nozzle 10 . According to FIGS. 4-6, however, it is also conceivable for the wear cap 19 to be screwed onto a corresponding external thread 18 of the nozzle 10 with an internal thread. The highest loads in relation to the arc-induced heat input and also spatter therefore act on the wear cap 19 and not on the more complex inert gas suction nozzle 10.
  • the service life of the combined inert gas suction nozzle 10 can be at least an order of magnitude longer than the service life of the wear cap 19 .
  • the suction device 3 essentially consists of aluminum, in particular an aluminum alloy.
  • the threaded insert 12 is preferably made of brass and the wear cap 19 may be made of copper.

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

Abstract

L'invention concerne une buse de gaz d'extraction/protecteur combinée (10) d'un chalumeau de soudage à l'arc comportant une électrode consommable munie d'un canal de gaz protecteur (1) pour alimenter en gaz protecteur le processus de soudage, et un dispositif d'extraction (3) comprenant au moins un canal d'extraction (6) doté d'une ouverture d'extraction (7) pour extraire le gaz de fumée produit pendant le processus de soudage. Selon l'invention, le canal de gaz protecteur (1) et le ou les canaux d'extraction (6) sont disposés radialement et décalés les uns par rapport aux autres dans la direction axiale de sorte que l'ouverture d'extraction (7) pour le ou les canaux d'extraction (6) se trouve derrière le canal de gaz protecteur (1) dans le sens d'écoulement du gaz de fumée.
EP22713668.6A 2021-05-06 2022-03-15 Buse de gaz d'extraction/protecteur combinée d'un chalumeau de soudage à l'arc comportant une électrode consommable et un col de chalumeau comprenant une buse de gaz d'extraction/protecteur combinée Pending EP4334072A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021111790.9A DE102021111790B4 (de) 2021-05-06 2021-05-06 Kombinierte Absaug-Schutzgasdüse eines Lichtbogenschweißbrenners mit abschmelzender Elektrode und Brennerhals mit einer kombinierten Absaug-Schutzgasdüse
PCT/EP2022/056709 WO2022233484A1 (fr) 2021-05-06 2022-03-15 Buse de gaz d'extraction/protecteur combinée d'un chalumeau de soudage à l'arc comportant une électrode consommable et un col de chalumeau comprenant une buse de gaz d'extraction/protecteur combinée

Publications (1)

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US (1) US20240217020A1 (fr)
EP (1) EP4334072A1 (fr)
DE (1) DE102021111790B4 (fr)
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798409A (en) * 1971-09-22 1974-03-19 Hobart Brothers Co Fume extracting welding gun nozzle
EP3804898A1 (fr) * 2019-10-11 2021-04-14 Amp Soudage Torche de soudage électrique sous gaz avec aspiration de fumées, et équipement de soudage associé

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5491321A (en) * 1992-02-26 1996-02-13 Tweco Products, Inc. Welding gun assembly
DE29617751U1 (de) 1996-10-12 1996-11-28 Team Binzel Industries GmbH & Co. KG, 35463 Fernwald Schweiß- und Schneidbrenner mit Rauchgasabsaugvorrichtung
AT413668B (de) 2003-05-13 2006-04-15 Fronius Int Gmbh Gasdüse für einen schweissbrenner und schweissbrenner mit einer derartigen gasdüse
DE102004008609A1 (de) 2004-02-21 2005-09-15 Alexander Binzel Schweisstechnik Gmbh & Co. Kg Gas- und/oder flüssiggekühlter Schweiß- oder Schneidbrenner
US7544914B2 (en) * 2005-04-08 2009-06-09 Lincoln Global, Inc. Fume gun
ITTO20070737A1 (it) 2007-10-18 2009-04-19 Aspirmig S R L Attrezzatura e metodo per saldatura a filo continuo
EP2298485A1 (fr) 2009-09-10 2011-03-23 TBI Industries GmbH Dispositif d'aspiration pour un chalumeau de soudage robotisé
EP2407267B1 (fr) 2010-07-14 2014-01-01 EWM Hightec Welding GmbH Torche de soudage avec un nez comprenant un flexible isolé
FR2979270B1 (fr) 2011-08-23 2013-09-27 Air Liquide Welding France Torche de soudage a l'arc a etancheite amelioree

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798409A (en) * 1971-09-22 1974-03-19 Hobart Brothers Co Fume extracting welding gun nozzle
EP3804898A1 (fr) * 2019-10-11 2021-04-14 Amp Soudage Torche de soudage électrique sous gaz avec aspiration de fumées, et équipement de soudage associé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2022233484A1 *

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DE102021111790A1 (de) 2022-11-10
WO2022233484A1 (fr) 2022-11-10
US20240217020A1 (en) 2024-07-04
DE102021111790B4 (de) 2024-07-04
DE102021111790A8 (de) 2024-01-18

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