SE7808721L - SET AND DEVICE FOR ELECTRIC WELDING UNDER NEGATIVE ELECTRODE PRESSURE - Google Patents

SET AND DEVICE FOR ELECTRIC WELDING UNDER NEGATIVE ELECTRODE PRESSURE

Info

Publication number
SE7808721L
SE7808721L SE7808721A SE7808721A SE7808721L SE 7808721 L SE7808721 L SE 7808721L SE 7808721 A SE7808721 A SE 7808721A SE 7808721 A SE7808721 A SE 7808721A SE 7808721 L SE7808721 L SE 7808721L
Authority
SE
Sweden
Prior art keywords
welding
electrode
mig
negative electrode
electric welding
Prior art date
Application number
SE7808721A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE442838B (en
Inventor
M E Wilkinson
Original Assignee
Welding Inst
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 Welding Inst filed Critical Welding Inst
Publication of SE7808721L publication Critical patent/SE7808721L/en
Publication of SE442838B publication Critical patent/SE442838B/en

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
    • B23K9/0061—Underwater arc welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

When metal inert gas (MIG) welding is carried out at normal atmospheric pressure, the electrode is made positive with respect to the workpiece because the use of a negative electrode gives little penetration. In undersea welding, as the pressure increases the arc stability and metal transfer in MIG welding become erratic and there is copious fume evolution. According to the present invention, MIG welding at pressures greater than 7 bars is carried out with the electrode negative with respect to the workpiece and with an electrode wire of diameter not greater than 1.4mm; the slope of the power supply, as seen from the welding arc, is preferably between 6 and 15V/l00A, which is higher than the 3 to 4V/l00A used in positive-electrode MIG welding at normal atmospheric pressure.
SE7808721A 1977-04-05 1978-08-17 VIEW TO WELD BY PRESSURE ATMOSPHERIC PRESSURE AND UNDERWATER WASHING SYSTEM SE442838B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1438977 1977-04-05

Publications (2)

Publication Number Publication Date
SE7808721L true SE7808721L (en) 1980-02-18
SE442838B SE442838B (en) 1986-02-03

Family

ID=10040312

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7808721A SE442838B (en) 1977-04-05 1978-08-17 VIEW TO WELD BY PRESSURE ATMOSPHERIC PRESSURE AND UNDERWATER WASHING SYSTEM

Country Status (5)

Country Link
JP (1) JPS5536008A (en)
CA (1) CA1108244A (en)
FR (1) FR2434000A1 (en)
NL (1) NL7808657A (en)
SE (1) SE442838B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892937A (en) * 1972-12-19 1975-07-01 Vladimir Evgenievich Paton Apparatus for underwater welding of metal structures
NO763404L (en) * 1975-10-10 1977-04-13 British Oxygen Co Ltd
NZ182982A (en) * 1976-01-12 1979-10-25 Boc Ltd Arc welding under water

Also Published As

Publication number Publication date
JPS5536008A (en) 1980-03-13
FR2434000B1 (en) 1983-09-30
NL7808657A (en) 1980-02-26
CA1108244A (en) 1981-09-01
JPS63151B2 (en) 1988-01-05
SE442838B (en) 1986-02-03
FR2434000A1 (en) 1980-03-21

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