Abrading – Abrading process – Utilizing fluent abradant
Patent
1994-06-24
1997-02-04
Rada, Rinaldi I.
Abrading
Abrading process
Utilizing fluent abradant
451 40, 451 53, 83 53, 83177, 134 24, B24C 100
Patent
active
055992234
ABSTRACT:
A method and apparatus that allows the removal of solid material from a workpiece utilizes a high velocity stream of ice which is caused to impinge on the workpiece. A working liquid, such as water, is supplied at high pressure to a discharge nozzle with an orifice for forming the needle-like stream. The water is cooled before it reaches the nozzle to a temperature below its freezing point so that at least some of the stream is transformed to ice. Optionally, the stream is cooled after it is emitted from the orifice by flowing an envelope of cryogenic gas around the emitted stream. The apparatus includes an inner conduit that carries the working liquid through a cutting tool where the liquid is at least partially solidified by an evaporator that utilizes a cryogenic fluid to cool the working liquid. In a second embodiment, the inner conduit can be moved longitudinally through the cutting tool from a position in which the orifice is proximate the cutting tool to a position in which the orifice is located remotely of the cutting tool. This allows the inner conduit to be indexed into the workpiece to make deep cuts without having to make a wide cut to accept the cutting tool.
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Rada Rinaldi I.
Woods Raymond D.
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