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FR2265249A1 - Plasma torch nozzle - cathode for longer service life - by time relay inserting load resistors in transductor circuit - Google Patents

Plasma torch nozzle - cathode for longer service life - by time relay inserting load resistors in transductor circuit

Info

Publication number
FR2265249A1
FR2265249A1 FR7508461A FR7508461A FR2265249A1 FR 2265249 A1 FR2265249 A1 FR 2265249A1 FR 7508461 A FR7508461 A FR 7508461A FR 7508461 A FR7508461 A FR 7508461A FR 2265249 A1 FR2265249 A1 FR 2265249A1
Authority
FR
France
Prior art keywords
transductor
cathode
service life
time relay
load resistors
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
FR7508461A
Other languages
French (fr)
Other versions
FR2265249B3 (en
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.)
Mansfeld Kombinat Wilhelm Pieck VEB
Original Assignee
Mansfeld Kombinat Wilhelm Pieck VEB
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 Mansfeld Kombinat Wilhelm Pieck VEB filed Critical Mansfeld Kombinat Wilhelm Pieck VEB
Publication of FR2265249A1 publication Critical patent/FR2265249A1/en
Application granted granted Critical
Publication of FR2265249B3 publication Critical patent/FR2265249B3/fr
Granted 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
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • 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

Landscapes

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

Abstract

The service life of the nozzle and of the cathode of a plasma cutting torch with transductor control can be increased by loading the transductor after completion of the cutting operation for a time of over two periods of the operational frequency with a much smaller (5%) current than the max. permissible load current. A time relay is used to introduce load resistors into the transductor output circuit. This eliminates the high starting current peaks caused by the remanence of the transductor cores. The plasma torch can pierce holes in quick succession without damage to cathode or nozzle. The system combines the advantage of little instrumentation with that of a high power density of the plasma arc.
FR7508461A 1974-03-18 1975-03-18 Plasma torch nozzle - cathode for longer service life - by time relay inserting load resistors in transductor circuit Granted FR2265249A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD177228A DD111621A1 (en) 1974-03-18 1974-03-18

Publications (2)

Publication Number Publication Date
FR2265249A1 true FR2265249A1 (en) 1975-10-17
FR2265249B3 FR2265249B3 (en) 1977-11-25

Family

ID=5495011

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7508461A Granted FR2265249A1 (en) 1974-03-18 1975-03-18 Plasma torch nozzle - cathode for longer service life - by time relay inserting load resistors in transductor circuit

Country Status (6)

Country Link
JP (1) JPS50125946A (en)
DD (1) DD111621A1 (en)
DE (1) DE2507785A1 (en)
FI (1) FI750802A7 (en)
FR (1) FR2265249A1 (en)
SE (1) SE7503081L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016044087A1 (en) * 2014-09-16 2016-03-24 The Esab Group, Inc. Reducing restart cycle time of a plasma blow back torch for improved marking

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016044087A1 (en) * 2014-09-16 2016-03-24 The Esab Group, Inc. Reducing restart cycle time of a plasma blow back torch for improved marking
US10743399B2 (en) 2014-09-16 2020-08-11 The Esab Group, Inc. Reducing restart cycle time of a plasma blow back torch for improved marking

Also Published As

Publication number Publication date
FI750802A7 (en) 1975-09-19
DE2507785A1 (en) 1975-09-25
JPS50125946A (en) 1975-10-03
SE7503081L (en) 1975-09-19
FR2265249B3 (en) 1977-11-25
DD111621A1 (en) 1975-02-20

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Legal Events

Date Code Title Description
ST Notification of lapse