B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
148/27, 78/60
B23K 7/06 (2006.01) B08B 15/00 (2006.01)
Patent
CA 1103568
ABSTRACT A thermochemical scarfing process and apparatus capable of reducing the amount of smoke discharged to the atmosphere and/or of preventing the formation of "secondary" fins when spot scarfing, comprising: (a) scarfing oxygen is directed against a reaction zone of molten metal on the surface of the workpiece to produce a scarfing reaction, and (b) relative movement is provided between the oxygen stream and the workpiece, said reaction forming a molten puddle in front of the reaction zone that grows larger as the cut progresses, wherein the improvement comprises: (c) directing at least one stream of non-reactive fluid to form a fluid, sheet-like curtain that provides a cover over the reaction zone and at least the rear portion of the molten puddle in such manner that said curtain forms a pocket with the surface of the workpiece.
290754
Hopley William G.
Union Carbide Corporation
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