Oxygen arc cutting with plasma pre-heating of ferrous materials, such as structural steel workpieces
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United States of America Patent
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Oct 22, 2002
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N/A
app pub date -
Jun 22, 2001
filing date -
Dec 22, 1998
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Expired
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Abstract
An installation and a method for oxygen arc cutting of a metal workpiece containing at least a ferrous material, in particular a structural steel workpiece, which consists in: pre-heating locally a priming zone of the metal workpiece to be cut by subjecting the priming zone to a plasma jet; then in producing a localized fusion and/or combustion of the ferrous material contained in the workpiece, using the plasma jet or a combination of the plasma jet and an oxidizing gas flow to obtain a perforation along the whole thickness of the metal workpiece; once the perforation has been obtained, in synchronously displacing, the plasma jet and the oxidizing gas flow along a cutting path to produce a predefined slit through the metal workpiece.
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