Process and apparatus for plasma melt cutting under water

Details Process and apparatus for plasma melt cutting under water Process and apparatus for plasma melt cutting under water

1989-03-10

1992-04-21

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912151, 2191215, 21912148, B23K 900

Patent

active

051070928

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.

REFERENCES:
patent: 4087670 (1978-05-01), Miller
patent: 4652725 (1987-03-01), Santen et al.
patent: 4816637 (1989-03-01), Sanders et al.
patent: 4861962 (1989-08-01), Sanders et al.

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