Cryogenic Machining

[Dave Koehler]

They want to call using nitrogen to cool the cutter cryogenic. Ehhh not so much as we know it.
Seems like that is a pricey way of doing it over coolant.
They are doing some serious hogging on the first pass though.
Need to see a time/cost study to go gee whiz.

https://www.youtube.com/watch?v=GY649nXXPhk

[Jer73]

https://link.springer.com/article/10.10 ... 020-2899-5

https://www.mmsonline.com/articles/the-400-difference

Just some quick googling and some skimming over related articles. They claim that cryogenic liquids like N2 and CO2 are several magnitudes better at removing heat / reducing wear from the tooling at lower spindle speeds, and a greater depth of cut can also be achieved. The ease of cleaning the machinery and environmental impact is also touched upon.

Nitrogen's boiling point is -320 degrees Fahrenheit so no doubt it is more effective than cutting fluids at reducing heat load on the tooling.

[Dave Koehler]

I could see it with things like titanium.
I wondered if the savings were negated by having to manually cleaning the cast iron chips out of the machine.
Most machines depend on the high pressure coolant to wash the chips down to the auger and out to the barrel.

[j-c-c]

What is the potential benefit of just using super cooled current cutting fluids, at a much lower cost?

Biggest concern with all metal removal operations ultimately is heat build up at the cutting edge.

I would think heat transfer with a liquid would be more efficient that a gas, when nitrogen quickly vaporizes, albeit even if it's colder.