Electric heating – Metal heating – By arc
Reexamination Certificate
2005-11-14
2011-11-01
Hoang, Tu B (Department: 3742)
Electric heating
Metal heating
By arc
C219S130210, C219S130310, C219S130320
Reexamination Certificate
active
08049140
ABSTRACT:
Disclosed here is a pulse welding control method and a pulse arc welding device capable of improving arc stability, and decreasing the amount of spatters. The structure contains arc short-circuit judging section (13) for judging a welding state; setting section (21) for defining parameters used for a short-circuit period and an arc period; secondary control section (25); and driving section (18). Secondary control section (25) sharply decreases welding current on detecting a moment when the tip of a wire has a neck just before recovery from the short circuit, according to at least any one of outputs from a welding current value detector, a welding voltage value detector, and the setting section. Driving section (18) selects from outputs of a pulse-waveform circuit section and a dip-waveform circuit section according to the signal from the setting section and the output from the arc short-circuit section, and outputs the selected data to a switching element.
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Machine Translation of JP 2563465.
Extended European Search Report (including Supplementary European Search Report and the European Search Opinion) issued Sep. 29, 2009 in corresponding European Application No. 05 80 6062.
Kawamoto Atsuhiro
Kowa Masaru
Mukai Yasushi
Hoang Tu B
Jennison Brian
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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