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 circuitInfo
- 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
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.
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)
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 |
-
1974
- 1974-06-20 FR FR7421472A patent/FR2275963A1/en active Granted
Cited By (3)
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 |