Welding process with delayed application of full current until after start of arc
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United States of America Patent
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Aug 8, 1995
Issued Date -
N/A
app pub date -
Jul 5, 1994
filing date -
Jul 5, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an arc welding process for welding pipes used to convey high purity gas, dispersion of particles into the pipes during welding is reduced by discharging an inert back shielding gas into one end of one pipe and holding the welding current at less than the normal welding current for a specified interval after the start of arc, the welding current thereafter being increased to its normal level.
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