Patent
Electric arc welding
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TLDR
In this article, a current comprised of squared waveform high-amplitude current pulse groups alternated with squared wave-form low-amber pulse groups was used for welding arc voltage/current condition changes and with respect to pulse group periods.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.read more
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Method and apparatus for feeding wire to a welding arc
TL;DR: In this article, a method and apparatus for feeding wire in a welding system include one or more motors disposed adjacent the wire to drive it, and a wire feed motor is also disposed along the wire path, and is closer to the source of wire than the torch.
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References
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Welding machine with digital pulse control
TL;DR: In this paper, an integrated programmed automatic welding machine is presented, in which pulseactuated wire feed control means for varying the rate of feed of welding wire to the torch, and pulse-actuated electrical control means to varying the weld energy factors at the torch.
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TL;DR: In this article, a pulse arc welding device includes a power source which produces a background current and pulse current imposed on it, and when such a voltage drop deviates from a predetermined level, either one of background current, frequency of the pulse current, and pulse duration of pulse current is controlled to maintain the voltage drop across the arc constant.