As contractors make greater use of composites and high-strength metals in aircraft structures, attention is focusing on ways of improving manufacturing productivity and reducing per-part cost. One technique to emerge for the machining of parts is cryogenic cooling, which can increase machining speed, reduce cutting force, extend cutting tool life, and lower the time and cost required to finish components. Cryogenic cooling uses liquid nitrogen (LN2), an inert substance that is usually ...

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