Electric arc welding

Details Electric arc welding Electric arc welding

1995-11-14

1997-07-01

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913051, B23K 909

Patent

active

056434790

ABSTRACT:
Methods and apparatus for the electric arc welding of metal workpieces utilize a current comprised of squared waveform high-amplitude current pulse groups alternated with squared waveform low-amplitude current pulse groups, the current pulse groups being developed or developed and algorithmically varied in response to detected welding arc voltage/current condition changes and with respect to pulse group periods, pulse group peak current amplitudes, pulse group repetition frequencies, and pulse group current rise/fall rates for particular applications.

REFERENCES:
patent: 2079956 (1937-05-01), Burgett
patent: 3555239 (1971-01-01), Kerth
patent: 3995138 (1976-11-01), Kalev et al.
patent: 4273988 (1981-06-01), Iceland et al.
patent: 4409465 (1983-10-01), Yamamoto et al.
patent: 4521672 (1985-06-01), Fronius
patent: 4758707 (1988-07-01), Ogilvie
patent: 5525778 (1996-06-01), Matsui et al.

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