details... - Faculty of Mechanical Engineering

SusCryMac
Improving Production
Cryogenic machining as sustainable
alternative to conventional machining
CLEAN MACHINING PROCESS

Sustainable machining method (cleaner,
safer, environment friendly, and more
health acceptable technology).

Increase tool-life (up to 100%) due to
lower abrasion and chemical wear.

Increase cutting speeds and material
removal rates and reduce overall cycle
time – productivity improvement (up to
100%).

Capable of machining of hard parts and
hard to machine alloys (Inconel, titanium,
etc.).

Improved machined part surface
quality/integrity with the absence of
mechanical and chemical degradation of
the machined surface.

Lower cutting temperatures in the cutting
zone.

Improvement of chip breakability, etc.
INNOVATIVE MACHINING
Cryogenic machining presents an innovative method
of delivering the cryogenic cooling media to the
cutting region of the tool, which experiences the
highest temperature during the machining process,
or to the workpiece to change the material
characteristics and improve machining performance.
University of Kentucky
US
– Cryogenic fluid: Liquid nitrogen that is liquefied by
cooling to -196°C.
– N2 is safe, noncombustible, noncorrosive,
colorless, odorless and tasteless gas.
– “inert” gas – nonreactive nature with many
materials.
– Leaving no residuals on workpiece, machine-tool,
etc. due to immediate evaporation when
delivered.
Nitrogen – 78
Nitrogen
78 %
%
Oxygen – 21
21 %
%
Other
Other –– 11 %
Laboratory for Machining
Faculty of Mechanical Engineering
University of Ljubljana
Askerceva 6,
SI 1000 Ljubljana
Contact:
– In fact 78% of air that we breathe is N2.
franci.pusavec@fs.uni-lj.si
janez.kopac@fs.uni-lj.si
www.fs.uni-lj.si/labod
Prolongation of tool-life
Results:
E!4550
-.…
--–
SusCryMac System (pat. pend.)
Dry
MQL
Flood
Cryo
Machine tool
Dewar- LN storage
More compressive residual stresses
Decreased
temperatures
Cutting tool holder
LN delivery
Cutting insert
References:
Control unit
+
software
Delivery pipes
Control
valves
F. PUŠAVEC, P. KRAJNIK, J. KOPAČ. Transitioning to sustainable production. Part 1, Application on machining technologies. J. clean. prod., 2010, vol. 18, iss. 2.
F. PUŠAVEC, D. KRAMAR, P. KRAJNIK, J. KOPAČ. Transitioning to sustainable production. Part 2, Evaluation of sustainable machining technologies. J. clean. prod., 2010, vol. 18, iss. 12.
F. PUŠAVEC, A. STOIĆ, J. KOPAČ. The role of cryogenics in machining processes. Teh. vjesn. - Stroj. fak., 2009, vol. 16, no. 4.
F. PUŠAVEC, A. STOIĆ, J. KOPAČ. Sustainable machining process - myth or reality. Strojarstvo, 2010, vol. 52, no. 2.