Process and apparatus for plasma melt cutting under water
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United States of America Patent
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-
Apr 21, 1992
Grant Date -
N/A
app pub date -
Mar 10, 1989
filing date -
Mar 10, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an improvement in a plasma burner having a cathode, said burner being adapted to cutting under a liquid an electrically conducting workpiece, wherein electricity forms an ionized gas plasma are between the cathode and the workpiece, the improvement including a nozzle for emitting under the liquid a cutting plasma arc, and guidance provisions in the nozzle for providing a discharge path for a protective gas hyperbolically to eddy about said cutting plasma arc, wherein the angle between the eddy of protective gas and the surface of the workpiece is from about 30.degree. to about 70.degree., for displacing the liquid from inside the eddy of the protective gas and the vicinity of the plasma arc.
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