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WO2004026520A2 - Bec de chalumeau pour chalumeau de soudage, buse a gaz, buse de contact et buse d'isolation pour un tel bec de chalumeau - Google Patents

Bec de chalumeau pour chalumeau de soudage, buse a gaz, buse de contact et buse d'isolation pour un tel bec de chalumeau Download PDF

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Publication number
WO2004026520A2
WO2004026520A2 PCT/AT2003/000276 AT0300276W WO2004026520A2 WO 2004026520 A2 WO2004026520 A2 WO 2004026520A2 AT 0300276 W AT0300276 W AT 0300276W WO 2004026520 A2 WO2004026520 A2 WO 2004026520A2
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
burner head
contact nozzle
gas
contact
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.)
Ceased
Application number
PCT/AT2003/000276
Other languages
German (de)
English (en)
Other versions
WO2004026520A3 (fr
Inventor
Walter Wimroither
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.)
Fronius International GmbH
Original Assignee
Fronius International 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 Fronius International GmbH filed Critical Fronius International GmbH
Priority to AU2003260163A priority Critical patent/AU2003260163A1/en
Priority to DE20380291U priority patent/DE20380291U1/de
Publication of WO2004026520A2 publication Critical patent/WO2004026520A2/fr
Publication of WO2004026520A3 publication Critical patent/WO2004026520A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • 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
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma 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
    • 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
    • B23K9/296—Supporting devices adapted for making use of shielding means the shielding means being a gas using non-consumable electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/3457—Nozzle protection devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H05H1/38—Guiding or centering of electrodes

Definitions

  • Torch head for welding torches as well as gas nozzle, contact nozzle and insulating nozzle for such a torch head
  • the invention relates to a torch head for welding torches, in particular for plasma welding torches with a base body, with a non-melting electrode, which electrode is surrounded by a contact nozzle, an insulating sleeve and a fuel gas supply being arranged between the electrode and the contact nozzle, furthermore with a contact nozzle surrounding gas nozzle, which gas nozzle has an internal thread for screwing onto a corresponding external thread on the base body, and with an oblique, annular stop surface for contact with a corresponding surface of the gas nozzle in the screwed-on state, and a protective gas supply is arranged between the gas nozzle and the contact nozzle.
  • the invention further relates to a gas nozzle with an internal thread for screwing onto a corresponding external thread arranged on the burner head, an oblique, annular surface being arranged at the rear end opposite the outlet opening for the protective gas, which surface is screwed onto a corresponding stop surface on the burner head Burner head comes to rest.
  • the invention relates to a contact nozzle for an above-mentioned burner head with a receptacle for an electrode surrounded by an insulating sleeve and an insulating sleeve for such a burner head.
  • Welding torch in particular for plasma welding processes, but also arc welding processes under a protective gas atmosphere, such as IG (metal inert gas) -, MAG (metal active gas) -, TIG (tungsten inert gas) -, TIG (tungsten inert) Gas) welding process, have a torch head as the core.
  • a burner head has connections for the electrical lines for supplying electrical energy to the electrode and for the contact sleeve and supply lines for the fuel gas and protective gas.
  • the fuel gas supplied between the contact nozzle and the electrode ionizes and emerges from the contact nozzle in the direction of the workpiece as a plasma jet due to the gas flow.
  • a protective gas is supplied via the gas nozzle, which is arranged concentrically around the contact nozzle, which surrounds the plasma jet and protects the melt on the workpiece from the surrounding air.
  • the gas nozzle which is arranged concentrically around the contact nozzle, which surrounds the plasma jet and protects the melt on the workpiece from the surrounding air.
  • the contact sleeve, the insulating sleeve and the electrode are wear parts which have to be replaced after a corresponding operating time.
  • torch heads can also be adapted to certain conditions by changing the components mentioned, or can be converted for other welding processes.
  • a torch head of an arc welding or cutting torch, but preferably with a melting wire electrode, is described for example in WO00 / 73700 AI.
  • No. 4,628,177 A describes a welding torch of the type in which the gas nozzle has an oblique stop surface and the base body of the torch head has a corresponding oblique stop surface.
  • the chamfer is used to seal the inside of the welding torch from the environment so that no shielding gas can escape.
  • the oblique stop surface is spaced from the external thread on the burner body, so that the gas nozzle does not have a good centering effect on the burner body. occurs.
  • US 4,743,734 A shows a nozzle for a plasma arc welding torch, which is made up of three parts that can be screwed together.
  • oblique, ring-shaped stop surfaces are formed on the parts of the nozzle against which corresponding surfaces of the adjacent parts bear.
  • US Pat. No. 3,783,233 A shows a gas nozzle for a welding torch, which is attached to the torch body via an insulating threaded bushing. Sliding on the gas nozzle has disadvantages compared to screwing it on with regard to the exact centered positioning.
  • the object of the present invention is therefore to provide an abovementioned burner head, the wearing parts of which, such as the gas nozzle, contact nozzle, insulating sleeve and electrode, can be replaced as quickly and easily as possible, and which permits exact positioning of the wearing parts on the base body.
  • the components of the burner head should be constructed as simply as possible and thus be inexpensive to manufacture.
  • Another object of the present invention is to provide a gas nozzle, contact nozzle and insulating sleeve for a torch head for welding torches, in particular for plasma welding torches, which can be arranged as quickly and easily as possible on the base body of the torch head, should be able to be positioned as precisely as possible on it and above easy and cheap to manufacture.
  • the first object according to the invention is achieved in that the oblique, annular stop surface is adjacent to the external thread on the base body.
  • the oblique stop surface causes an exact, centered positioning of the gas nozzle in relation to the base body of the burner head, as would not be the case with a simple assembly using a thread, since each thread has a certain amount of play.
  • An eccentric arrangement of the gas nozzle in relation to the contact nozzle and electrode would asymmetrical flow conditions for the gas and for the arc created, which would reduce the quality of the weld.
  • the centering device of the burner head formed by the inclined stop surface is very easy and inexpensive to manufacture and also results in very simple assembly of the gas nozzle on the burner head.
  • the sloping surface also increases the surface area and thus creates a better seal even without additional sealing elements.
  • the oblique annular stop surface can be integrated in the base body or can also be formed by an annular body which can be screwed or plugged onto the base body of the burner head.
  • the annular body can be formed from a different material than the basic body.
  • the ring-shaped body can consist of ceramic.
  • a sealing ring can be arranged on the stop surface, which can be made of elastic plastic, for example.
  • the elastic plastic must withstand the temperatures that occur at the corresponding point on the torch head during welding.
  • An internal thread for screwing on the contact nozzle provided with a corresponding external thread is advantageously arranged on the base body, so that the contact nozzle can be quickly and easily removed and reinstalled.
  • the shielding gas supply leads into essentially radially arranged openings on the base body of the burner head, it can be achieved that the annular space formed between the gas nozzle and the contact nozzle also in the rear, i.e. the area opposite the nozzle opening, is filled with protective gas and, as a result, optimal flow conditions prevail at the outlet of the protective gas at the opening of the gas nozzle.
  • a plurality of openings or rows of openings can also be arranged next to one another in the axial direction.
  • Ceramic has proven to be the ideal material for the gas nozzle. However, special plastics are also conceivable for certain applications.
  • the contact nozzle which must be made of an electrically conductive material, is advantageously made of copper or a copper alloy.
  • the insulating sleeve in the burner head which is arranged between the electrode and the contact nozzle, is preferably made of ceramic, so that it withstands the temperatures that occur and provides the appropriate electrical insulation.
  • the object of the invention is also achieved by a gas nozzle for an above-mentioned burner head with an internal thread for screwing onto a corresponding external thread arranged on the burner head, in which the stop surface on the burner head adjoins the end of the external thread on the burner head, so that the gas nozzle is centered.
  • the inclined surface has an inclination of essentially 30 ° with respect to the surface of the internal thread. This is advantageous on the one hand with regard to the production of the gas nozzle and the stop surface on the burner head and on the other hand for the centering effect.
  • the outlet opening is tapered in the direction of the flow of the protective gas.
  • This construction ensures that the insulating sleeve and subsequently the electrode in the contact nozzle are centered.
  • the receptacle of the contact nozzle is essentially cylindrical and the insulating sleeve has webs in the longitudinal direction
  • the receptacle is modified accordingly in the contact nozzle described in order to achieve optimal centering of the insulating sleeve.
  • the corresponding areas with a smaller inner diameter can be produced relatively easily since the preferred material for the contact nozzle is copper or a copper alloy.
  • the fuel gas can flow through the channels formed between the regions into the space between the contact nozzle and the electrode, which is ionized to form a plasma jet.
  • the receptacle can have a cross section in the form of an equilateral polygon.
  • This can be a cross section in the form of an equilateral triangle, quadrangle, pentagon, hexagon or the like.
  • the corners of the polygon form the center of the channels through which the fuel gas flows, while the edges of the polygon in the middle area serve as a support for the insulating sleeve.
  • the regions can also be formed by ribs or the like.
  • the ribs and thus the channels arranged between the ribs can be arranged in a spiral.
  • the receptacle in the contact nozzle can have a section with a smaller inner diameter than the rest of the receptacle at the end assigned to the tip of the electrode. As a result, a stop is formed for the insulating sleeve placed in the contact nozzle and a cross-sectional constriction is formed for the fuel gas.
  • a conical area can be arranged between the section with a smaller inner diameter and the rest of the receptacle optimal flow conditions for the fuel gas.
  • the contact nozzle has a conical area on its outside, an optimal positioning of the contact nozzle on the burner head can be achieved.
  • the last object of the invention is achieved by an insulating sleeve for an above-mentioned burner head with an above-mentioned contact nozzle, in which the outside is essentially cylindrical, and with indentations or the like on the end of the insulating sleeve facing the tip of the electrode. are arranged to guide the fuel gas between the electrode and contact nozzle.
  • insulating sleeves according to the prior art which have ribs or the like on the outside for a centered placement within the contact nozzle
  • cylindrical insulating sleeves are particularly simple and inexpensive to manufacture.
  • the fuel gas can flow through the indentations through the channels between the contact nozzle and the insulating sleeve and then over the indentations in the direction of the opening of the contact nozzle.
  • the indentations can simply be formed by a plurality of grooves which are preferably arranged at equal angular intervals.
  • FIG. 1 shows a cross section through an embodiment of a torch head for a plasma welding torch.
  • FIG. 2 shows a section through an exemplary embodiment of a gas nozzle
  • FIG. 3 shows a section through an embodiment of a contact nozzle
  • 4a and 4b show a side view of two different embodiments of contact nozzles according to FIG. 3;
  • FIG. 5 shows a contact nozzle with an insulating sleeve arranged therein
  • FIG. 6 shows a contact nozzle with an insulating sleeve and electrode arranged therein
  • FIG. 7 shows a section along the section line VII-VII according to FIG. 6;
  • FIG. 8 shows a section through an exemplary embodiment of an insulating sleeve
  • FIG. 9 shows a side view of the insulating sleeve according to FIG. 8.
  • FIG. 10 shows a section through another embodiment of an insulating sleeve
  • FIG. 11 is a side view of the insulating sleeve according to FIG. 10.
  • a torch head 1 for a plasma welding torch consisting of a base body 2, at the end of which a gas nozzle 3 with an internal thread 4 is screwed onto a corresponding external thread 5 on the base body 2. Furthermore, a contact nozzle 6 made of electrically conductive material is arranged on the burner head, in which a non-melting electrode 7 is placed. Between the contact nozzle 6 and the electrode 7, an insulating sleeve 8, which is made of ceramic, for example, is arranged. In addition, feeds 9 for the burner gas, which flows in between the contact nozzle 6 and the electrode 7, are found on the burner head 1.
  • the electrode 7, the insulating sleeve 8, the contact nozzle 6 and the gas nozzle 3 must be arranged in the center.
  • centering takes place via an oblique ring-shaped stop surface 11 on the burner head 1, which comes into contact with the corresponding surface 12 when the gas nozzle 3 is screwed on.
  • the oblique annular stop surface 11 can be integrated on the base body 2 of the burner head 1 or can be designed as an annular body 13 which e.g. is screwed or plugged onto the base body 2.
  • the annular body 13, like the gas nozzle 3, can be made of ceramic.
  • a sealing ring 14 for example made of elastic plastic, can also be arranged on the oblique stop surface 11 in order to achieve an even better seal of the space formed between the gas nozzle 3 and the contact nozzle 6 from the environment and thus to an undesired escape of protective gas to the rear prevent.
  • an internal thread 15 for screwing on the contact nozzle 6 provided with a corresponding external thread 16 is arranged on the base body 2 of the burner head 1 or on a body connected to it.
  • the protective gas feed 10 advantageously opens into essentially radially arranged openings 17 on the base body 2. This prevents anyone from forming areas in the space between the gas nozzle 3 and the contact nozzle 6 that do not are filled with protective gas.
  • the openings 17 are advantageously arranged around the entire circumference of the base body 2 of the burner head 1 at equal angular distances from one another.
  • FIG. 2 shows a sectional view of the gas nozzle 3 according to FIG. 1 in an enlarged representation.
  • the internal thread 4 for screwing the gas nozzle 3 onto a corresponding external thread 5 arranged on the burner head 1 can be seen.
  • Arranged at the rear end 19 opposite the outlet opening 18 of the gas nozzle 3 is the oblique annular surface 12, which comes into contact with the burner head 1 when it is screwed onto the burner head 1 against a corresponding stop surface 11 at the end of the external thread 5.
  • the inclination of the inclined surface 12 is advantageously essentially 30 ° with respect to the surface of the internal thread 4 of the gas nozzle 3.
  • the outlet opening (18) is in the direction of the Shielding gas flow tapered.
  • Fig. 3 shows a section through a contact nozzle 6 for a torch head 1 of a plasma welding device.
  • the contact nozzle 6 has a receptacle 20 for an electrode 7 surrounded by an insulating sleeve 8.
  • an external thread 16 is arranged on the outside.
  • the receptacle 20 of the contact nozzle 6 has, according to the invention, a plurality of regions 21 arranged essentially in the longitudinal direction of the receptacle 20, the inside diameter Di of the receptacle 20 at the locations of these regions 21 being smaller than that inner diameter D A outside of these regions 21.
  • these regions 21 can be formed, for example, by corresponding ribs or the edges of a polygon.
  • Channels 22 are formed between the regions 21 with a smaller inner diameter Di, through which the fuel gas can reach the tip of the electrode 7.
  • the arrangement of the regions 21 enables the insulating sleeve 8 to be optimally centered within the contact nozzle 6.
  • FIGS. 6 and 7 show an arrangement of an electrode 7 together with an insulating sleeve 8 in a contact nozzle 6. 7, the channels 22 formed between the regions 21 between the contact nozzle 6 and the insulating sleeve 8, through which the fuel gas flows in the direction of the tip of the electrode 7, can be clearly seen.
  • FIGS. 8 and 9 and FIGS. 10 and 11 show sectional representations and side views of two different embodiments of insulating sleeves 8.
  • the insulating sleeve 8 is essentially cylindrical and has indentations 27 on the end face facing the tip of the electrode 7.
  • these indentations 27 are formed by four grooves which are each arranged at equal angular intervals of 90 °.
  • the fuel gas first passes through the channels 22 between the contact nozzle 6 and the insulating sleeve 8 and then via the indentations 27 to the tip of the electrode 7, where it is ionized in the arc between the electrode 7 and the contact nozzle 6.
  • the indentations 27 are round. The number and the shape of the indentations 27 can be made almost arbitrarily.

Landscapes

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

Abstract

La présente invention concerne un bec de chalumeau (1) pour un chalumeau de soudage, comprenant un corps de base (2) qui présente une électrode non fusible (7) entourée par une buse de contact (6). Un manchon d'isolation (8) et une alimentation en gaz de soudage (9) sont placés entre ladite électrode (7) et ladite buse de contact (6). Ledit bec de chalumeau comprend également une buse à gaz (3) qui entoure la buse de contact (6) et qui présente un filetage interne (4) permettant de la visser sur un filetage externe correspondant (5) sur le corps de base (2), ainsi qu'une surface de butée (11) inclinée et annulaire, qui permet un appui sur une surface correspondante (12) de la buse à gaz lorsque celle-ci est vissée. Une alimentation en gaz protecteur (10) est placée entre ladite buse à gaz (3) et ladite buse de contact (6). L'objectif de la présente invention est de mettre au point un bec de chalumeau (1) avec lequel les pièces d'usure peuvent être remplacées particulièrement facilement et peuvent être mises en place de manière particulièrement optimale. A cette fin, la surface de butée (11) inclinée et annulaire est adjacente au filetage externe (5) sur le corps de base (2). La buse de contact (6) présente en son intérieur des zones (21), par exemple des nervures, qui permettent de centrer le manchon d'isolation (8).
PCT/AT2003/000276 2002-09-18 2003-09-17 Bec de chalumeau pour chalumeau de soudage, buse a gaz, buse de contact et buse d'isolation pour un tel bec de chalumeau Ceased WO2004026520A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003260163A AU2003260163A1 (en) 2002-09-18 2003-09-17 Torch head for welding torches and gas nozzle, contact nozzle, and insulation nozzle for such a torch head
DE20380291U DE20380291U1 (de) 2002-09-18 2003-09-17 Brennerkopf für Schweißbrenner sowie Gasdüse, Kontaktdüse und Isolierdüse für einen solchen Brennerkopf

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0140102A AT411972B (de) 2002-09-18 2002-09-18 Brennerkopf für schweissbrenner sowie gasdüse, kontaktdüse und isolierhülse für einen solchen brennerkopf
ATA1401/2002 2002-09-18

Publications (2)

Publication Number Publication Date
WO2004026520A2 true WO2004026520A2 (fr) 2004-04-01
WO2004026520A3 WO2004026520A3 (fr) 2004-08-26

Family

ID=30120915

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2003/000276 Ceased WO2004026520A2 (fr) 2002-09-18 2003-09-17 Bec de chalumeau pour chalumeau de soudage, buse a gaz, buse de contact et buse d'isolation pour un tel bec de chalumeau

Country Status (4)

Country Link
AT (1) AT411972B (fr)
AU (1) AU2003260163A1 (fr)
DE (1) DE20380291U1 (fr)
WO (1) WO2004026520A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615408A (zh) * 2011-01-30 2012-08-01 日铁住金溶接工业株式会社 插入式芯片及等离子枪

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4957746B2 (ja) * 2009-04-13 2012-06-20 株式会社デンソー プラズマ発生装置

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US2685631A (en) * 1951-05-26 1954-08-03 Union Carbide & Carbon Corp Gas shielded arc welding torch
US3783233A (en) * 1967-10-04 1974-01-01 Co Ordinated Ind Inc Welding gun cooling structure and electrode tip retainer
US3562486A (en) * 1969-05-29 1971-02-09 Thermal Dynamics Corp Electric arc torches
US3813510A (en) * 1972-02-04 1974-05-28 Thermal Dynamics Corp Electric arc torches
AT339694B (de) * 1973-03-21 1977-11-10 Aga Ab Plasmabrenner
US4628177A (en) * 1984-08-10 1986-12-09 B & B Precision Machines, Inc. Arc welding torch
SE447461B (sv) * 1985-04-25 1986-11-17 Npk Za Kontrolno Zavaratschni Sammansatt munstycke for plasmatron
US4716269A (en) * 1986-10-01 1987-12-29 L-Tec Company Plasma arc torch having supplemental electrode cooling mechanisms
EP1248500A3 (fr) * 1998-05-26 2004-04-21 The Lincoln Electric Company Torche de soudage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102615408A (zh) * 2011-01-30 2012-08-01 日铁住金溶接工业株式会社 插入式芯片及等离子枪
CN102615408B (zh) * 2011-01-30 2014-10-08 日铁住金溶接工业株式会社 插入式芯片及等离子枪

Also Published As

Publication number Publication date
AT411972B (de) 2004-08-26
ATA14012002A (de) 2004-01-15
WO2004026520A3 (fr) 2004-08-26
DE20380291U1 (de) 2005-05-19
AU2003260163A1 (en) 2004-04-08

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