JPS57193279A - Engine driven type dc welding machine - Google Patents

Engine driven type dc welding machine

Info

Publication number
JPS57193279A
JPS57193279A JP56076679A JP7667981A JPS57193279A JP S57193279 A JPS57193279 A JP S57193279A JP 56076679 A JP56076679 A JP 56076679A JP 7667981 A JP7667981 A JP 7667981A JP S57193279 A JPS57193279 A JP S57193279A
Authority
JP
Japan
Prior art keywords
welding
generator
current
resistor
power
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.)
Pending
Application number
JP56076679A
Other languages
Japanese (ja)
Inventor
Makoto Matsuo
Naoya Sudo
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.)
Nippon Kokan Koji KK
JFE Engineering Corp
Original Assignee
Nippon Kokan Koji KK
Nippon Kokan Ltd
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 Nippon Kokan Koji KK, Nippon Kokan Ltd filed Critical Nippon Kokan Koji KK
Priority to JP56076679A priority Critical patent/JPS57193279A/en
Publication of JPS57193279A publication Critical patent/JPS57193279A/en
Pending 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
    • B23K9/1006—Power supply
    • B23K9/1012—Power supply characterised by parts of the process
    • B23K9/1037—Means preventing crater forming at the extremity of the seam

Landscapes

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

Abstract

PURPOSE:To obtain crater current upon ending of welding by inserting the other resistor having normally closed contacts which can be opened and closed by signals as by-pass in series to the resistor inserted in series to the excitation coil of a DC power generator. CONSTITUTION:An engine driven type DC welding machine 41 which welds the work 11 by generating an arc between a W electrode 9 and the work under controlling of a TIG welding controller 17 thereby melting a filler bar 12 containes a power generator 2 and a rectifier 7 which supply welding power, and a power generator 4 and a rectifier 5 which supply the excitation current of the generator 2 and the electric power for control circuits. When a torch switch 28 is first pushed, an inert gas is supplied from a cylinder 13 to a torch 10, and the arc is generated by the controller 17, after which regular current for welding is flowed. Upon ending of the welding, normally closed contacts 43 are opened by a solenoid switch 44 in accordance with the signal of a control circuit 25, then the excitation current decreases by passing through a resistor 42, by which the electric power generated by the generator 2 is decreased and the crater current is obtained.
JP56076679A 1981-05-22 1981-05-22 Engine driven type dc welding machine Pending JPS57193279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56076679A JPS57193279A (en) 1981-05-22 1981-05-22 Engine driven type dc welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56076679A JPS57193279A (en) 1981-05-22 1981-05-22 Engine driven type dc welding machine

Publications (1)

Publication Number Publication Date
JPS57193279A true JPS57193279A (en) 1982-11-27

Family

ID=13612111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56076679A Pending JPS57193279A (en) 1981-05-22 1981-05-22 Engine driven type dc welding machine

Country Status (1)

Country Link
JP (1) JPS57193279A (en)

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