FR2275963A1 - Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit - Google Patents

Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit

Info

Publication number
FR2275963A1
FR2275963A1 FR7421472A FR7421472A FR2275963A1 FR 2275963 A1 FR2275963 A1 FR 2275963A1 FR 7421472 A FR7421472 A FR 7421472A FR 7421472 A FR7421472 A FR 7421472A FR 2275963 A1 FR2275963 A1 FR 2275963A1
Authority
FR
France
Prior art keywords
auxiliary
current
striking
main arc
plasma
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
FR7421472A
Other languages
French (fr)
Other versions
FR2275963B1 (en
Inventor
D G Bykhovsky
A Y Medvedev
A Y Finkelshtein
J A Bogorodsky
M I Zax
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.)
INST ELEKTROSVAROCHNOGO OBORUD
Original Assignee
INST ELEKTROSVAROCHNOGO OBORUD
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 INST ELEKTROSVAROCHNOGO OBORUD filed Critical INST ELEKTROSVAROCHNOGO OBORUD
Priority to FR7421472A priority Critical patent/FR2275963A1/en
Publication of FR2275963A1 publication Critical patent/FR2275963A1/en
Application granted granted Critical
Publication of FR2275963B1 publication Critical patent/FR2275963B1/fr
Granted 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
    • 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
    • B23K10/006—Control circuits therefor
    • 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
    • B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
    • B23K9/067—Starting the arc
    • B23K9/0672—Starting the arc without direct contact between electrodes
    • B23K9/0673—Ionisation of the arc gap by means of a tension with a step front (pulses or high frequency tensions)

Landscapes

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

Abstract

An auxiliary arc is struck between the electrode and the jet in the burner, using a high-frequency discharge, and plasma gas is fed to the burner so the flare bridges the gap between the electrode and the workpiece, thereby striking the main arc. The amplitude of the auxiliary high-frequency current must be at least equal to the desired value of the main current, and both the frequency and the pulse duty factor of the auxiliary current are adjusted so that a visualy controllable, steady flare is obtd. for the entire period in which the auxiliary current is used. The amplitude of the auxiliary current is pref. between I and 31 (where I is the desired value of the current in the main arc), and the pref. ave. auxiliary current is 3-10 A. Circuit is reliable, simple and cheap.
FR7421472A 1974-06-20 1974-06-20 Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit Granted FR2275963A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7421472A FR2275963A1 (en) 1974-06-20 1974-06-20 Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7421472A FR2275963A1 (en) 1974-06-20 1974-06-20 Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit

Publications (2)

Publication Number Publication Date
FR2275963A1 true FR2275963A1 (en) 1976-01-16
FR2275963B1 FR2275963B1 (en) 1976-10-15

Family

ID=9140306

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7421472A Granted FR2275963A1 (en) 1974-06-20 1974-06-20 Striking a main arc between plasma and metal workpiece - using an auxiliary alternating current circuit

Country Status (1)

Country Link
FR (1) FR2275963A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535992A1 (en) * 1982-11-12 1984-05-18 Soudure Autogene Francaise HIGH FREQUENCY STARTING DEVICE AND AUXILIARY ELECTRODE OF ELECTRIC ARC FOR WELDING OR CUTTING

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535992A1 (en) * 1982-11-12 1984-05-18 Soudure Autogene Francaise HIGH FREQUENCY STARTING DEVICE AND AUXILIARY ELECTRODE OF ELECTRIC ARC FOR WELDING OR CUTTING
EP0109891A1 (en) * 1982-11-12 1984-05-30 La Soudure Autogene Francaise Starting appliance using high frequency tensions and auxiliary electrode of an electric welding or cutting arc
US4493969A (en) * 1982-11-12 1985-01-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude High-frequency arc striking device and auxiliary electrode of an electric welding or cutting arc

Also Published As

Publication number Publication date
FR2275963B1 (en) 1976-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse