EP0144267B1 - Torche de soudage ou coupage et procédé d'allumage d'un arc pour cette torche - Google Patents

Torche de soudage ou coupage et procédé d'allumage d'un arc pour cette torche Download PDF

Info

Publication number
EP0144267B1
EP0144267B1 EP84402439A EP84402439A EP0144267B1 EP 0144267 B1 EP0144267 B1 EP 0144267B1 EP 84402439 A EP84402439 A EP 84402439A EP 84402439 A EP84402439 A EP 84402439A EP 0144267 B1 EP0144267 B1 EP 0144267B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
electrode
torch
arc
workpiece
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.)
Expired
Application number
EP84402439A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0144267A3 (en
EP0144267A2 (fr
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Lincoln Electric Co France SA
Original Assignee
La Soudure Autogene Francaise
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, 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/fr
Publication of EP0144267A3 publication Critical patent/EP0144267A3/fr
Application granted granted Critical
Publication of EP0144267B1 publication Critical patent/EP0144267B1/fr
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 by short circuit of an arc for a welding or cutting torch, more particularly plasma cutting. It relates firstly to a welding or cutting torch of the kind comprising in a torch body an electrode coaxially disposed inside a metal nozzle for guiding a gas comprising an orifice aligned with said electrode, with, in the torch body, a mutual axial displacement assembly of the electrode and of the nozzle between a position of mutual contact and a position of maximum spacing which corresponds to the normal spacing in operation, the latter position being taken under action elastic means.
  • the ignition of the plasma torches 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.
  • the electrode is slidably mounted in the torch body and, more precisely, the screw electrode is mounted in a thread of the body of the torch. torch, so that the approach of the electrode towards the nozzle, eppuié on a workpiece connected to the positive terminal of said current source and the withdrawal of the electrode, which causes the creation of the arc, s '' perform by operating a knurled button, which has the drawback of being very slow and creating damage to the nozzle, due to the maintenance for a fairly long period of time of an arc which cannot be transferred to the workpiece only after complete removal of the electrode.
  • the object of the present invention is to provide a welding or cutting torch which is particularly simple to make and use, and a method of igniting an arc for such a welding or cutting torch, which are particularly rapid and convenient to enforce.
  • a welding or cutting torch of the kind recalled above is characterized in that the mounting with mutual axial movement of the electrode and of the nozzle is carried out by a mounting with free sliding of the nozzle in the body torch, the electrode being fixed, said elastic means urging the nozzle towards its position of maximum spacing.
  • the electrode is connected to a terminal of a current source, and a part to be treated at its other terminal; the nozzle is supported on this part so as to bring the nozzle of the electrode closer to their mutual contact; and the contact pressure is reduced, which causes the creation of an arc between the electrode and the nozzle, then, after separation of the torch from the part, the immediate transfer of this arc to the part itself.
  • 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 port 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 surface 8 ends with an internal shoulder 11 against which abuts a projecting part towards the outside laughing 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 by bringing the front face 5 ′ of the nozzle 5 into contact with the part 16 and then continuing its pressure by moving the torch body 1 and the electrode 2 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)
  • Manufacture And Refinement Of Metals (AREA)
  • Discharge Heating (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Cable Accessories (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Adhesives Or Adhesive Processes (AREA)
EP84402439A 1983-12-07 1984-11-29 Torche de soudage ou coupage et procédé d'allumage d'un arc pour cette torche Expired EP0144267B1 (fr)

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
FR8319554 1983-12-07
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

Publications (3)

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

Family

ID=9294935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402439A Expired EP0144267B1 (fr) 1983-12-07 1984-11-29 Torche de soudage ou coupage et procédé d'allumage d'un arc pour cette torche

Country Status (11)

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

Families Citing this family (53)

* 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
FR2562748B1 (fr) * 1984-04-04 1989-06-02 Soudure Autogene Francaise Torche de soudage ou coupage a plasma
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
US4701590A (en) * 1986-04-17 1987-10-20 Thermal Dynamics Corporation Spring loaded electrode exposure interlock device
US4791268A (en) * 1987-01-30 1988-12-13 Hypertherm, Inc. Arc plasma torch and method using contact starting
US4902871A (en) * 1987-01-30 1990-02-20 Hypertherm, Inc. Apparatus and process for cooling a plasma arc electrode
FR2626206B1 (fr) * 1988-01-25 1990-05-18 Soudure Autogene Francaise Torche et machine de travail a l'arc, et cartouche pour cette torche
FR2650470B1 (es) * 1989-07-28 1992-09-04 Soudure Autogene Francaise
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
US5994663A (en) * 1996-10-08 1999-11-30 Hypertherm, Inc. Plasma arc torch and method using blow forward contact starting system
US5897795A (en) * 1996-10-08 1999-04-27 Hypertherm, Inc. Integral spring consumables for plasma arc torch using blow forward contact starting system
FI964347A (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
US5900169A (en) * 1997-06-06 1999-05-04 Hypertherm, Inc. Safety circuit for a blow forward contact start plasma arc torch
US5886315A (en) * 1997-08-01 1999-03-23 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
US6677551B2 (en) * 1998-10-23 2004-01-13 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
US6163009A (en) * 1998-10-23 2000-12-19 Innerlogic, Inc. Process for operating a plasma arc torch
US6163008A (en) * 1999-12-09 2000-12-19 Thermal Dynamics Corporation Plasma arc torch
US6703581B2 (en) 2001-02-27 2004-03-09 Thermal Dynamics Corporation Contact start plasma torch
US6903301B2 (en) * 2001-02-27 2005-06-07 Thermal Dynamics Corporation Contact start plasma arc torch and method of initiating a pilot arc
KR100933480B1 (ko) * 2001-03-09 2009-12-23 하이퍼썸, 인크. 플라즈마 아크 토치, 복합전극, 전극 제조 방법 및 복합전극 냉각 방법
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
US9516736B2 (en) 2007-10-16 2016-12-06 Foret Plasma Labs, Llc System, method and apparatus for recovering mining fluids from mining byproducts
US9051820B2 (en) 2007-10-16 2015-06-09 Foret Plasma Labs, Llc System, method and apparatus for creating an electrical glow discharge
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
US9185787B2 (en) 2007-10-16 2015-11-10 Foret Plasma Labs, Llc High temperature electrolysis glow discharge device
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
US8278810B2 (en) 2007-10-16 2012-10-02 Foret Plasma Labs, Llc Solid oxide high temperature electrolysis glow discharge cell
US9445488B2 (en) 2007-10-16 2016-09-13 Foret Plasma Labs, Llc Plasma whirl reactor apparatus and methods of use
US9761413B2 (en) 2007-10-16 2017-09-12 Foret Plasma Labs, Llc High temperature electrolysis glow discharge device
US11806686B2 (en) 2007-10-16 2023-11-07 Foret Plasma Labs, Llc System, method and apparatus for creating an electrical glow discharge
US8810122B2 (en) 2007-10-16 2014-08-19 Foret Plasma Labs, Llc Plasma arc torch having multiple operating modes
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
MX2010008819A (es) 2008-02-12 2010-11-05 Foret Plasma Labs Llc Metodo, sistema y aparato para combustion con escaso combustible con plasma de arco electrico.
US8258424B2 (en) * 2009-08-20 2012-09-04 The Esab Group, Inc. Plasma torch with electrode wear detection system
US20120223058A1 (en) * 2009-11-04 2012-09-06 Kabushiki Kaisha Yaskawa Denki Non-consumable electrode type arc welding apparatus
US9949356B2 (en) 2012-07-11 2018-04-17 Lincoln Global, Inc. Electrode for a plasma arc cutting torch
MX2015007359A (es) 2012-12-11 2015-12-01 Foret Plasma Labs Llc Sistema de reactor de vortice a contracorriente a alta temperatura, metodo y aparato.
WO2014165255A1 (en) 2013-03-12 2014-10-09 Foret Plasma Labs, Llc Apparatus and method for sintering proppants
FR3107159B1 (fr) 2020-02-10 2022-12-02 Akryvia Torche plasma à amorcage direct et tuyère à barrière diélectrique correspondante

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

Also Published As

Publication number Publication date
JPH0130591B2 (es) 1989-06-21
CA1218421A (fr) 1987-02-24
BR8406245A (pt) 1985-10-01
EP0144267A3 (en) 1985-07-24
ATE34503T1 (de) 1988-06-15
FR2556549A1 (fr) 1985-06-14
JPS60141367A (ja) 1985-07-26
ZA848923B (en) 1985-07-31
ES538318A0 (es) 1986-06-01
US4567346A (en) 1986-01-28
AU3636984A (en) 1985-06-13
AU573660B2 (en) 1988-06-16
DE3471430D1 (en) 1988-06-23
EP0144267A2 (fr) 1985-06-12
FR2556549B1 (fr) 1986-10-17
ES8608266A1 (es) 1986-06-01

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