GB1470546A - Method of and apparatus for plasma working of conductive materials - Google Patents

Method of and apparatus for plasma working of conductive materials

Info

Publication number
GB1470546A
GB1470546A GB2746874A GB2746874A GB1470546A GB 1470546 A GB1470546 A GB 1470546A GB 2746874 A GB2746874 A GB 2746874A GB 2746874 A GB2746874 A GB 2746874A GB 1470546 A GB1470546 A GB 1470546A
Authority
GB
United Kingdom
Prior art keywords
arc
pilot arc
resistor
nozzle
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.)
Expired
Application number
GB2746874A
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.)
V N I PK I T I ELEKTROSVAROCHN
Original Assignee
V N I PK I T I ELEKTROSVAROCHN
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 V N I PK I T I ELEKTROSVAROCHN filed Critical V N I PK I T I ELEKTROSVAROCHN
Priority to GB2746874A priority Critical patent/GB1470546A/en
Publication of GB1470546A publication Critical patent/GB1470546A/en
Expired 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
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/006—Control circuits therefor

Landscapes

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

Abstract

1470546 Welding by fusion VSES NI PRO. EKTNO-KONSTRUKTOR I TEKHNOL INST ELEKTROSVAROCH OBURUDOVANIYA 20 June 1974 27468/74 Heading B3R [Also in Division H2] Plasma arc welding or cutting apparatus comprises an electrode 16 surrounded by a nozzle 12 interconnected by a high voltage, high frequency oscillator 14 operation of which causes a high frequency arc to be produced between the nozzle 12 and electrode 16 which ionizes the gas fed into the nozzle so permitting a pilot arc to be developed between the electrode 16 and nozzle 12, the pilot arc being fed from a thyristor type power supply 15 by way of an RC circuit, the pilot arc being instrumental in the striking of the main arc between the electrode 16 and a workpiece 13 the supply 15 also supplying the main arc by way of an inductor L. With the pilot arc only alight the pilot arc current is determined by the RC combination but when the main arc is struck the capacitor C becomes fully charged whereupon the pilot arc current is reduced and is determined only by the resistor R. The resistor R may be variable and controlled so as to have a minimum value when the pilot arc only is alight and to have a maximum value when the main arc is burning. A switch may be placed in series with the resistor R which is opened when the main arc is struck thereby terminating the pilot arc current flame. A similar mode of operation is obtained by placing a diode in series with the resistor.
GB2746874A 1974-06-20 1974-06-20 Method of and apparatus for plasma working of conductive materials Expired GB1470546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2746874A GB1470546A (en) 1974-06-20 1974-06-20 Method of and apparatus for plasma working of conductive materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2746874A GB1470546A (en) 1974-06-20 1974-06-20 Method of and apparatus for plasma working of conductive materials

Publications (1)

Publication Number Publication Date
GB1470546A true GB1470546A (en) 1977-04-14

Family

ID=10260087

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2746874A Expired GB1470546A (en) 1974-06-20 1974-06-20 Method of and apparatus for plasma working of conductive materials

Country Status (1)

Country Link
GB (1) GB1470546A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee