Economical and Ecological Cryogenic Machining

[+] Author and Article Information
Shane Y. Hong

Department of Mechanical Engineering, Columbia University, New York, NY 10027

J. Manuf. Sci. Eng 123(2), 331-338 (Sep 01, 1999) (8 pages) doi:10.1115/1.1315297 History: Received October 01, 1998; Revised September 01, 1999
Copyright © 2001 by ASME
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Principle of economical cryogenic cooling process
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Design of the nozzles: (a) when both primary nozzle and auxiliary nozzle are used to inject liquid nitrogen (b) only primary nozzle is used (c) photo of the tool assembly with LN2 flowing
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From the back of the CNC turning center, LN2 is fed from the cylinder to the turret via vacuum jacket line
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Vacuum jacketed delivery line
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Quick-change LN2 delivery line at the turret
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Tool life comparison in terms of total volume removed before tool failure
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Tool life comparison for cryogenic cooling and emulsion cooling in log-log scale
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Productivity comparison of cryogenic machining and conventional machining
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Machine/labor cost comparison
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Coolant cost comparison
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Production cost comparison of cryogenic and conventional machining
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Chip breaking improvement for machining AISI 1008 low carbon steel




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