EP0144267A2 - Schweiss- oder Schneidbrenner und Verfahren zum Entzünden eines Bogens für diesen Brenner - Google Patents

Schweiss- oder Schneidbrenner und Verfahren zum Entzünden eines Bogens für diesen Brenner Download PDF

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Publication number
EP0144267A2
EP0144267A2 EP84402439A EP84402439A EP0144267A2 EP 0144267 A2 EP0144267 A2 EP 0144267A2 EP 84402439 A EP84402439 A EP 84402439A EP 84402439 A EP84402439 A EP 84402439A EP 0144267 A2 EP0144267 A2 EP 0144267A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
electrode
torch
arc
mutual
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.)
Granted
Application number
EP84402439A
Other languages
English (en)
French (fr)
Other versions
EP0144267B1 (de
EP0144267A3 (en
Inventor
Gérard Marhic
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Lincoln Electric Company France SA
Original Assignee
La Soudure Autogene Francaise
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 La Soudure Autogene Francaise, Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical La Soudure Autogene Francaise
Priority to AT84402439T priority Critical patent/ATE34503T1/de
Publication of EP0144267A2 publication Critical patent/EP0144267A2/de
Publication of EP0144267A3 publication Critical patent/EP0144267A3/fr
Application granted granted Critical
Publication of EP0144267B1 publication Critical patent/EP0144267B1/de
Expired legal-status Critical Current

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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
    • 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
    • H05H1/3421—Transferred arc or pilot arc mode
    • 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
    • H05H1/3442—Cathodes with inserted tip
    • 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
    • H05H1/3489—Means for contact starting

Definitions

  • the present invention relates to the ignition of an arc for a welding or cutting torch, more particularly plasma cutting, of the type comprising a coaxial electrode located inside a metal nozzle for guiding a gas escaping through a orifice aligned with said electrode.
  • this ignition is carried out by the device of high frequency discharges which are established in the gas in the course of circulation between the electrode and the nozzle.
  • These auxiliary means for creating high-frequency discharges prove to be expensive, in particular for low-power plasma cutting torches. It has been proposed to mount, in the torch body, the electrode and the nozzle with axial displacement from a position of maximum spacing corresponding to the normal spacing in operation up to a position of mutual contact, to connect the electrode to a negative terminal of a direct current source, to bring the nozzle to the potential of a positive terminal of said direct current source, to carry out the axial displacement of the electrode with respect to the nozzle until bring into mutual contact and then move the electrode away from the nozzle so as to cause the creation of an arc in the plasma gas flowing in the space between electrode and nozzle.
  • the electrode is slidably mounted in the torch body and more precisely the electrode is screwed into a thread of the torch body, so that the approach of the electrode towards the nozzle and the removal of the electrode, which causes the creation of the arc, is carried out by operating a knurled button, which has the drawback of being very slow and creating damage on the nozzle, due to maintenance for a fairly long period of time of an arc which can only be transferred to the work immediately after complete removal of the electrode.
  • the object of the present invention is to provide a method of igniting an arc for a welding or cutting torch, which is particularly quick to implement, and a welding or cutting torch which is particularly simple to carry out.
  • a terminal of the current source is connected exclusively to the part to be treated, the electrical potentialing of the torch nozzle being exclusively carried out by direct contact between said nozzle and said part, the mutual axial displacement between electrode and nozzle being produced by a free sliding assembly of the nozzle in the torch body, this nozzle being urged into its correct working position by an elastic force, the approximation of the electrode and the nozzle being effected by direct support of the torch nozzle against said part and the operation d priming includes, first during a reduction of the contact pressure, as indicated above, the creation of an arc between electrode and nozzle, then after separation of the torch from the part, immediate transfer of this arc towards the room itself.
  • a welding torch of the type recalled above is characterized in that the assembly with mutual axial movement of the electrode and of the nozzle is carried out by a free sliding assembly of the nozzle in the torch body with an elastic means urging the nozzle to its maximum spacing position.
  • a cutting torch comprises, in a torch body whose front end 1 is seen, an axial electrode 2 with an emissive insert 3 forming between it and the torch body an annular passage 4 for a plasma gas.
  • a nozzle 5 having in its front part 5 'a discharge orifice 6 aligned, coaxial with the electrode 2.
  • This nozzle 5 is mounted by its cylindrical external face 7 sliding on an internal cylindrical surface 8 of a nozzle holder 9 screwed at 10 onto the torch body 1, the cylindrical seat 8 ends with an internal shoulder 11 against the water abuts a projecting part towards the outside 12 of the nozzle.
  • This part 12 when it bears against the stop 11 determines the correct axial spacing of the nozzle 5 relative to the electrode 2 during the cutting operation.
  • This correct position of the nozzle is ensured by the pressure exerted by a compression spring 13 resting on the one hand in a nozzle groove 14 and in a clearance 15 from the torch body 1.
  • the plasma gas is supplied into the space between the electrode and the nozzle and flows through the orifice 6.
  • the cutting generator 19 is connected by its negative pole to the electrode 2 and by its positive pole to the workpiece 16, which at this time is located at a certain distance from the welding torch.
  • the operator approached the cutting torch of the part 16 in a direction normal to the plane of the part, first bringing the front face 5 ′ of the nozzle 5 into contact with the part 16 and then continuing its pressure by causing the torch body 1 and the electrode 2 to move relative to the nozzle 5, then immobilized, against the action of the compression spring 13 until the electrode 2 comes into contact with the internal face of the nozzle 5.
  • the current generator is in short-circuit and the current flows from the part 16 towards the nozzle 5, and from the nozzle 5 towards the electrode 2.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Arc Welding In General (AREA)
  • Plasma Technology (AREA)
  • Arc Welding Control (AREA)
  • Discharge Heating (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Cable Accessories (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
EP84402439A 1983-12-07 1984-11-29 Schweiss- oder Schneidbrenner und Verfahren zum Entzünden eines Bogens für diesen Brenner Expired EP0144267B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402439T ATE34503T1 (de) 1983-12-07 1984-11-29 Schweiss- oder schneidbrenner und verfahren zum entzuenden eines bogens fuer diesen brenner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8319554A FR2556549B1 (fr) 1983-12-07 1983-12-07 Procede d'allumage d'un arc pour torche de soudage ou coupage et torche adaptee a mettre en oeuvre ce procede
FR8319554 1983-12-07

Publications (3)

Publication Number Publication Date
EP0144267A2 true EP0144267A2 (de) 1985-06-12
EP0144267A3 EP0144267A3 (en) 1985-07-24
EP0144267B1 EP0144267B1 (de) 1988-05-18

Family

ID=9294935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402439A Expired EP0144267B1 (de) 1983-12-07 1984-11-29 Schweiss- oder Schneidbrenner und Verfahren zum Entzünden eines Bogens für diesen Brenner

Country Status (11)

Country Link
US (1) US4567346A (de)
EP (1) EP0144267B1 (de)
JP (1) JPS60141367A (de)
AT (1) ATE34503T1 (de)
AU (1) AU573660B2 (de)
BR (1) BR8406245A (de)
CA (1) CA1218421A (de)
DE (1) DE3471430D1 (de)
ES (1) ES8608266A1 (de)
FR (1) FR2556549B1 (de)
ZA (1) ZA848923B (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157702B1 (de) * 1984-04-04 1988-06-08 La Soudure Autogene Francaise Schweiss- oder Schneidplasmabrenner
EP0243087A3 (de) * 1986-04-17 1988-09-14 Thermal Dynamics Corporation Lichtbogen-Plasmabrenner
FR2626206A1 (fr) * 1988-01-25 1989-07-28 Soudure Autogene Francaise Torche et machine de travail a l'arc, et cartouche pour cette torche
EP0410875A1 (de) * 1989-07-28 1991-01-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Elektrode für Plasmalichtbogenbrenner und entsprechender Brenner
EP0490882A1 (de) * 1987-01-30 1992-06-17 Hypertherm, Inc. Bogenplasmaflamme und Verfahren zum Kontaktstarten
WO1998016090A1 (en) * 1996-10-08 1998-04-16 Hypertherm, Inc. Plasma arc torch and method using contact starting system
WO1998056215A1 (en) * 1997-06-06 1998-12-10 Hypertherm, Inc. A safety circuit for a blow forward contact start plasma arc torch
WO1999007193A1 (en) * 1997-08-01 1999-02-11 Hypertherm, Inc. Blow forward contact start plasma arc torch with distributed nozzle support
US6130399A (en) * 1998-07-20 2000-10-10 Hypertherm, Inc. Electrode for a plasma arc torch having an improved insert configuration
FR3107159A1 (fr) 2020-02-10 2021-08-13 Akryvia Torche plasma à amorcage direct et tuyère à barrière diélectrique correspondante

Families Citing this family (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4559439A (en) * 1983-01-21 1985-12-17 Plasma Energy Corporation Field convertible plasma generator and its method of operation
FR2578137B1 (fr) * 1985-02-22 1987-03-27 Soudure Autogene Francaise Torche de soudage ou de coupage plasma munie d'une cartouche tuyere
IT1204121B (it) * 1986-02-27 1989-03-01 Cebora Spa Torcia di saldatura o taglio al plasma con arco non trasferito
US4902871A (en) * 1987-01-30 1990-02-20 Hypertherm, Inc. Apparatus and process for cooling a plasma arc electrode
JP2594649B2 (ja) * 1989-09-29 1997-03-26 松下電器産業株式会社 プラズマ切断または溶接用トーチ
FR2654294B1 (fr) * 1989-11-08 1992-02-14 Aerospatiale Torche a plasma a amorcage par court-circuit.
IT1243170B (it) * 1990-11-29 1994-05-24 Trafimet Trafilerie Metalliche Torcia per taglio al plasma con innesco per contatto
US5208441A (en) * 1991-04-29 1993-05-04 Century Manufacturing Co. Plasma arc ignition system
US5796067A (en) * 1995-10-30 1998-08-18 The Lincoln Electric Company Plasma arc torches and methods of operating and testing the same
US5660745A (en) * 1995-12-15 1997-08-26 Illinois Tool Works Inc. Method and apparatus for a contact start plasma cutting process
US5897795A (en) * 1996-10-08 1999-04-27 Hypertherm, Inc. Integral spring consumables for plasma arc torch using blow forward contact starting system
FI964347A7 (fi) * 1996-10-28 1998-04-29 Plasma Modules Oy Plasmapoltin
US5841095A (en) * 1996-10-28 1998-11-24 Hypertherm, Inc. Apparatus and method for improved assembly concentricity in a plasma arc torch
US6163009A (en) * 1998-10-23 2000-12-19 Innerlogic, Inc. Process for operating a plasma arc torch
US6326583B1 (en) 2000-03-31 2001-12-04 Innerlogic, Inc. Gas control system for a plasma arc torch
US6498317B2 (en) 1998-10-23 2002-12-24 Innerlogic, Inc. Process for operating a plasma arc torch
US6677551B2 (en) * 1998-10-23 2004-01-13 Innerlogic, Inc. Process for operating a plasma arc torch
US6163008A (en) * 1999-12-09 2000-12-19 Thermal Dynamics Corporation Plasma arc torch
US6903301B2 (en) * 2001-02-27 2005-06-07 Thermal Dynamics Corporation Contact start plasma arc torch and method of initiating a pilot arc
US6703581B2 (en) 2001-02-27 2004-03-09 Thermal Dynamics Corporation Contact start plasma torch
JP2004527878A (ja) 2001-03-09 2004-09-09 ハイパーサーム インコーポレイテッド プラズマアークトーチ用複合電極
US8764978B2 (en) 2001-07-16 2014-07-01 Foret Plasma Labs, Llc System for treating a substance with wave energy from an electrical arc and a second source
US7622693B2 (en) 2001-07-16 2009-11-24 Foret Plasma Labs, Llc Plasma whirl reactor apparatus and methods of use
US6969819B1 (en) * 2004-05-18 2005-11-29 The Esab Group, Inc. Plasma arc torch
US11806686B2 (en) 2007-10-16 2023-11-07 Foret Plasma Labs, Llc System, method and apparatus for creating an electrical glow discharge
US10267106B2 (en) 2007-10-16 2019-04-23 Foret Plasma Labs, Llc System, method and apparatus for treating mining byproducts
US9230777B2 (en) 2007-10-16 2016-01-05 Foret Plasma Labs, Llc Water/wastewater recycle and reuse with plasma, activated carbon and energy system
US8074439B2 (en) 2008-02-12 2011-12-13 Foret Plasma Labs, Llc System, method and apparatus for lean combustion with plasma from an electrical arc
US9051820B2 (en) 2007-10-16 2015-06-09 Foret Plasma Labs, Llc System, method and apparatus for creating an electrical glow discharge
US9516736B2 (en) 2007-10-16 2016-12-06 Foret Plasma Labs, Llc System, method and apparatus for recovering mining fluids from mining byproducts
US8278810B2 (en) 2007-10-16 2012-10-02 Foret Plasma Labs, Llc Solid oxide high temperature electrolysis glow discharge cell
US9761413B2 (en) 2007-10-16 2017-09-12 Foret Plasma Labs, Llc High temperature electrolysis glow discharge device
US9560731B2 (en) 2007-10-16 2017-01-31 Foret Plasma Labs, Llc System, method and apparatus for an inductively coupled plasma Arc Whirl filter press
US8810122B2 (en) 2007-10-16 2014-08-19 Foret Plasma Labs, Llc Plasma arc torch having multiple operating modes
US9185787B2 (en) 2007-10-16 2015-11-10 Foret Plasma Labs, Llc High temperature electrolysis glow discharge device
US9445488B2 (en) 2007-10-16 2016-09-13 Foret Plasma Labs, Llc Plasma whirl reactor apparatus and methods of use
US10244614B2 (en) 2008-02-12 2019-03-26 Foret Plasma Labs, Llc System, method and apparatus for plasma arc welding ceramics and sapphire
US8904749B2 (en) 2008-02-12 2014-12-09 Foret Plasma Labs, Llc Inductively coupled plasma arc device
US8258424B2 (en) * 2009-08-20 2012-09-04 The Esab Group, Inc. Plasma torch with electrode wear detection system
EP2497597A4 (de) * 2009-11-04 2014-10-29 Yaskawa Denki Seisakusho Kk Lichtbogenschweissmaschine mit nicht abschmelzender elektrode
US9949356B2 (en) 2012-07-11 2018-04-17 Lincoln Global, Inc. Electrode for a plasma arc cutting torch
US9499443B2 (en) 2012-12-11 2016-11-22 Foret Plasma Labs, Llc Apparatus and method for sintering proppants
CN105189919B (zh) 2013-03-12 2017-12-01 弗雷特等离子实验室公司 用于烧结支撑剂的设备和方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2898441A (en) * 1957-07-03 1959-08-04 Union Carbide Corp Arc torch push starting
US3242305A (en) * 1963-07-03 1966-03-22 Union Carbide Corp Pressure retract arc torch
US3832513A (en) * 1973-04-09 1974-08-27 G Klasson Starting and stabilizing apparatus for a gas-tungsten arc welding system
CA1111913A (en) * 1977-03-30 1981-11-03 Naoyoshi Hosoda Plasma-arc welding and cutting machine
US4370539A (en) * 1980-10-07 1983-01-25 Npk Za Kontrolno Zavarachni Raboti Device for the manual start-up of a plasma torch

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0157702B1 (de) * 1984-04-04 1988-06-08 La Soudure Autogene Francaise Schweiss- oder Schneidplasmabrenner
EP0243087A3 (de) * 1986-04-17 1988-09-14 Thermal Dynamics Corporation Lichtbogen-Plasmabrenner
EP0490882A1 (de) * 1987-01-30 1992-06-17 Hypertherm, Inc. Bogenplasmaflamme und Verfahren zum Kontaktstarten
US4914271A (en) * 1988-01-25 1990-04-03 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Arc working torch and machine, and cartridge for said torch
FR2626206A1 (fr) * 1988-01-25 1989-07-28 Soudure Autogene Francaise Torche et machine de travail a l'arc, et cartouche pour cette torche
EP0326445A1 (de) * 1988-01-25 1989-08-02 La Soudure Autogene Francaise Plasmabrenner, Lichtbogen-Materialbearbeitungsvorrichtung und Kopf für diesen Plasmabrenner
EP0410875A1 (de) * 1989-07-28 1991-01-30 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Elektrode für Plasmalichtbogenbrenner und entsprechender Brenner
FR2650470A1 (de) * 1989-07-28 1991-02-01 Soudure Autogene Francaise
US5083005A (en) * 1989-07-28 1992-01-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Electrode for working plasma torch and corresponding torch
AU727927B2 (en) * 1996-10-08 2001-01-04 Hypertherm, Inc. Plasma arc torch and method using contact starting system
WO1998016090A1 (en) * 1996-10-08 1998-04-16 Hypertherm, Inc. Plasma arc torch and method using contact starting system
EP1765045A3 (de) * 1996-10-08 2007-09-26 Hypertherm, Inc. Lichtbogen-Plasmabrenner und Verfahren, das ein Kontaktstartsystem verwendet
WO1998056215A1 (en) * 1997-06-06 1998-12-10 Hypertherm, Inc. A safety circuit for a blow forward contact start plasma arc torch
US5900169A (en) * 1997-06-06 1999-05-04 Hypertherm, Inc. Safety circuit for a blow forward contact start plasma arc torch
WO1999007193A1 (en) * 1997-08-01 1999-02-11 Hypertherm, Inc. Blow forward contact start plasma arc torch with distributed nozzle support
US6130399A (en) * 1998-07-20 2000-10-10 Hypertherm, Inc. Electrode for a plasma arc torch having an improved insert configuration
FR3107159A1 (fr) 2020-02-10 2021-08-13 Akryvia Torche plasma à amorcage direct et tuyère à barrière diélectrique correspondante
WO2021160450A1 (fr) 2020-02-10 2021-08-19 Akryvia Torche plasma à amorcage direct et tuyère à barrière diélectrique correspondante

Also Published As

Publication number Publication date
AU3636984A (en) 1985-06-13
EP0144267B1 (de) 1988-05-18
AU573660B2 (en) 1988-06-16
CA1218421A (fr) 1987-02-24
ES538318A0 (es) 1986-06-01
DE3471430D1 (en) 1988-06-23
BR8406245A (pt) 1985-10-01
US4567346A (en) 1986-01-28
ZA848923B (en) 1985-07-31
FR2556549B1 (fr) 1986-10-17
ATE34503T1 (de) 1988-06-15
EP0144267A3 (en) 1985-07-24
JPH0130591B2 (de) 1989-06-21
ES8608266A1 (es) 1986-06-01
JPS60141367A (ja) 1985-07-26
FR2556549A1 (fr) 1985-06-14

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