CA2192904A1 - Method and Apparatus for a Contact Start Plasma Cutting Process - Google Patents

Method and Apparatus for a Contact Start Plasma Cutting Process

Info

Publication number
CA2192904A1
CA2192904A1 CA2192904A CA2192904A CA2192904A1 CA 2192904 A1 CA2192904 A1 CA 2192904A1 CA 2192904 A CA2192904 A CA 2192904A CA 2192904 A CA2192904 A CA 2192904A CA 2192904 A1 CA2192904 A1 CA 2192904A1
Authority
CA
Canada
Prior art keywords
nozzle
air
torch
valve
electrode
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
CA2192904A
Other languages
French (fr)
Other versions
CA2192904C (en
Inventor
Peter Naor
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of CA2192904A1 publication Critical patent/CA2192904A1/en
Application granted granted Critical
Publication of CA2192904C publication Critical patent/CA2192904C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H05H1/36—Circuit arrangements
    • 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

Abstract

An plasma cutter, including a power supply, a cutting torch (with a nozzle), a source of air and a valve, is disclosed. The cutting torch is connected to the two power source outputs (cathode and anode) Air is supplied to the nozzle through the valve from the air supply. In one position the valve allows air to flow from the air source to the nozzle. In a second position the valve prevents air from flowing from the air supply to the nozzle and also vents the nozzle and torch. The torch has a movable electrode and the nozzle is in a fixed position. The nozzle and electrode are each electrically connected to a different one of the power outputs. The electrode is biased (preferably by a spring) to be in contact with the nozzle. However, air flowing into the torch and electrode overcomes the bias and moves the electrode away from the nozzle. If the arc is absent and the user desires current, then the valve is moved to prevent air from flowing into the torch and to vent the torch. Also, the valve is moved to provide air flow (thus purging the torch) when the power supply is powered up.
CA002192904A 1995-12-15 1996-12-13 Method and apparatus for a contact start plasma cutting process Expired - Fee Related CA2192904C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/573,380 1995-12-15
US08/573,380 US5660745A (en) 1995-12-15 1995-12-15 Method and apparatus for a contact start plasma cutting process

Publications (2)

Publication Number Publication Date
CA2192904A1 true CA2192904A1 (en) 1997-06-16
CA2192904C CA2192904C (en) 2000-02-08

Family

ID=24291765

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002192904A Expired - Fee Related CA2192904C (en) 1995-12-15 1996-12-13 Method and apparatus for a contact start plasma cutting process

Country Status (6)

Country Link
US (5) US5660745A (en)
EP (1) EP0779771B1 (en)
CN (1) CN1087203C (en)
AU (1) AU683807B2 (en)
CA (1) CA2192904C (en)
DE (1) DE69613087T2 (en)

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US6350960B1 (en) 2000-11-28 2002-02-26 Thermal Dynamics Corporation Parts-in-place safety reset circuit and method for contact start plasma-arc torch
US6703581B2 (en) 2001-02-27 2004-03-09 Thermal Dynamics Corporation Contact start plasma torch
US6420672B1 (en) 2001-03-30 2002-07-16 Illinois Tool Works Inc. Method and apparatus for detecting an inadequate gas supply for a plasma cutter
US6369350B1 (en) 2001-05-30 2002-04-09 Thermal Dynamics Corporation Plasma-arc torch system with pilot re-attach circuit and method
US6689983B2 (en) * 2002-02-26 2004-02-10 Thermal Dynamics Corporation Torch handle gas control
DE10210210A1 (en) * 2002-03-01 2003-12-11 Gtv Ges Fuer Thermischen Versc Power supply device for a plasma torch device and method for generating a pulsed output current
US6794601B2 (en) 2002-09-05 2004-09-21 Thermal Dynamics Corporation Plasma arc torch system with pilot re-attach circuit and method
US7807937B2 (en) * 2005-01-03 2010-10-05 Illinois Tool Works Inc. Method and system of conserving plasma torch consumable
US20060163220A1 (en) * 2005-01-27 2006-07-27 Brandt Aaron D Automatic gas control for a plasma arc torch
AT502422B1 (en) * 2005-09-09 2007-06-15 Fronius Int Gmbh METHOD FOR OPERATING A WATER STEAM PLASMA CYLINDER AND WATER VAPOR CUTTING DEVICE
US7781699B2 (en) * 2006-03-30 2010-08-24 Illinois Tool Works Inc. Plasma torch with post flow control
US8350182B2 (en) * 2006-09-11 2013-01-08 Hypertherm, Inc. Portable autonomous material processing system
US7615720B2 (en) * 2006-09-11 2009-11-10 Hypertherm, Inc. Pilot arc circuit for a contact start plasma torch
US9662747B2 (en) 2006-09-13 2017-05-30 Hypertherm, Inc. Composite consumables for a plasma arc torch
US9560732B2 (en) 2006-09-13 2017-01-31 Hypertherm, Inc. High access consumables for a plasma arc cutting system
US7989727B2 (en) 2006-09-13 2011-08-02 Hypertherm, Inc. High visibility plasma arc torch
US10194516B2 (en) 2006-09-13 2019-01-29 Hypertherm, Inc. High access consumables for a plasma arc cutting system
US10098217B2 (en) 2012-07-19 2018-10-09 Hypertherm, Inc. Composite consumables for a plasma arc torch
US7982159B2 (en) * 2007-09-25 2011-07-19 Kaliburn, Inc. Plasma arc ignition using a unipolar pulse
US20090160573A1 (en) * 2007-12-19 2009-06-25 Illinois Tool Works, Inc. GFCI-Compatible Circuit for Plasma Cutting System
US9878395B2 (en) * 2008-03-14 2018-01-30 Illinois Tool Works Inc. Method for detecting current transfer in a plasma arc
US8258423B2 (en) 2009-08-10 2012-09-04 The Esab Group, Inc. Retract start plasma torch with reversible coolant flow
US8503201B2 (en) * 2009-12-03 2013-08-06 Schneider Electric It Corporation Transient clamping circuitry for voltage converter
US9649715B2 (en) * 2009-12-30 2017-05-16 Lincoln Global, Inc. Pulse width modulation control of gas flow for plasma cutting and marking
WO2014032302A1 (en) 2012-09-03 2014-03-06 Schneider Electric It Corporation Method and apparatus for controlling distribution of power
US9522438B2 (en) 2012-11-09 2016-12-20 Hypertherm, Inc. Battery-controlled plasma arc torch system
US9550251B2 (en) 2014-03-28 2017-01-24 Hypertherm, Inc. Power supply assembly for a plasma arc torch system
PL3051928T3 (en) * 2015-01-29 2019-07-31 Kjellberg-Stiftung Plasma torch
US9833860B1 (en) 2016-07-22 2017-12-05 Lincoln Global, Inc. System and method for plasma arc transfer for plasma cutting
CN110036696B (en) 2016-10-21 2024-03-08 海别得公司 Plasma electric tool
CN106513957A (en) * 2016-12-29 2017-03-22 上海通用重工集团有限公司 Air plasma cutter
CN111805065A (en) * 2020-07-13 2020-10-23 南通阳光焊割设备有限公司 Gas console of plasma cutting machine and control method

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Also Published As

Publication number Publication date
US6486430B2 (en) 2002-11-26
CA2192904C (en) 2000-02-08
AU7030396A (en) 1997-08-14
US20010037996A1 (en) 2001-11-08
DE69613087T2 (en) 2001-09-20
EP0779771B1 (en) 2001-05-30
CN1165066A (en) 1997-11-19
DE69613087D1 (en) 2001-07-05
CN1087203C (en) 2002-07-10
US5828030A (en) 1998-10-27
US6054670A (en) 2000-04-25
US5660745A (en) 1997-08-26
EP0779771A1 (en) 1997-06-18
US6242710B1 (en) 2001-06-05
AU683807B2 (en) 1997-11-20

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