details... - Faculty of Mechanical Engineering
Transcription
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. [email protected] [email protected] 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.