Gene S Rogers

US Patent:

50216244, Jun 4, 1991

Filed:

Apr 11, 1988

Appl. No.:

7/180343

Inventors:

Gene Rogers - Westwood CA
Alex H. de Martimprey - Westwood CA

International Classification:

B23K 900

US Classification:

219 70

Abstract:

Cutting tools for MIG (metal-inert gas) welders and conventional electric arc welders which provide clean and fast cutting action of ferrous and other oxidizable materials using only a directed stream of oxygen after cutting is initiated. For MIG welders, the cutting tool may be in the form of an attachment coming with or solid separately from the hand unit of the MIG welders. Such attachment is coupled to a source of oxygen and includes a manual control for the jet of oxygen used to oxidize and thereby cut the metal. To initiate the cutting action, an electric arc is first established for a short time to sufficiently locally heat the metal so that rapid oxidation will proceed without any further outside source of energy. Thereafter, the oxygen jet directed at the heated metal is turned on and the electric arc turned off or extinguished, with cutting then proceeding at a rapid rate using only the oxygen jet to both oxidize the metal as a source of heat and blow away molten metal to provide a clean, readily controllable cut without excessive heating of the adjacent material, minimizing the untempering of heat treated materials, and in the case of thin material, without warping the same.