Achievements of sustainable manufacturing by machining

• Autorzy: Kopac J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Manufacturing industry is under increasing pressure of global competition, stricter environmental legislation and supply-chain demand for improved sustainability performance. The latter can be achieved through changes in products, processes and systems which are related to the sustainability issues. Sustainability in manufacturing is an appropriate approach; however it is still unified to a higher production rate and benefit. To encounter this problem academic, scientific, cultural and human organizations have to find the way, on a highest level of decision; maybe to rise the sustainability over production growth. This paper also presents some results from modelling and optimization of sustainable machining of Inconel 718. High temperature alloys, such as Nickel and Titanium alloys, pose significant difficulty in machining, due to their unique thermo-mechanical properties. Design/methodology/approach: In the paper are presented and evaluated two sustainable machining alternatives: cryogenic machining and high pressure assisted machining in comparison to conventional machining. The sustainability performance measures refer to environmental impact, energy consumption, safety, personal health, waste management and costs. The sustainability evaluation is supported with machining experiments on high-temperature Ni-alloy (Inconel 718). It is shown that tooling costs are presenting the major contribution to the overall production costs, when hard-to-machine materials are machined, what is contradictory with previous analysis. Findings: As a result, it is shown that sustainable machining alternatives offer economic, environmental and social performance improvement in comparison to conventional machining. The results of the experimental part show that appropriate cooling/lubrication application can provide improved overall machining performance while satisfying sustainable issues in terms of enhanced machined surface quality, tool-life, chip breakability, power consumption and increasing productivity. Research limitations/implications: The Faculty of Mechanical Engineering in Ljubljana, Slovenia is implementing two new cutting strategies for the machining of a special material – Inconel. The first one is cryogenic machining and the second is material cutting by assistance of high pressure jet cooling lubrication. Both machining strategy are in rang of sustainable manufacturing. The implications of processes like those are not only nature friendly, but also modern spirit for producers and users of products. Originality/value: Paper present the technical description of two modern machining processes, the comparison of them and benefit, advantages and disantvantages. Really new is the strategy and opinion of spirit, which can be included in product over sustainable manufacturing processes.

Słowa kluczowe

EN

sustainable development; sustainable manufacturing; cryogenic machining; high pressure jet assisted machining; near-dry machining

PL

stały rozwój; stałe wytwarzanie; obróbka kriogeniczna; obróbka wysokociśnieniową strugą; obróbka prawie na sucho

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 34, nr 2
• Strony: 180--187
• Opis fizyczny: Bibliogr. 16 poz., rys., tabl.

Twórcy

autor

Kopac J.

• Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, 1000 Ljubljana, Slovenia,

Bibliografia

• [1] World Commission on Environment and Development, Our Common Future, Oxford University Press, New York, 1987.
• [2] E. Westkamper, Manufuture and Sustainable Manufacturing, Proceedings of the 41st CIRP Conference “Manufacturing Systems”, Tokyo, 2008, 11-14.
• [3] F. Pusavec, J. Kopac, Achieving and Implementation of Sustainability Principles in Machining Processes, Journal of Advances in Production Engineering and Management 3 (2009) (in press).
• [4] J. Kopac, F. Pusavec, S. Ekinovic, High performance manufacturing – definition and aims, Proceedings of the 10th International Research/Expert Conference “Trends in the Development of Machinery and Associated Technology” TMT 2006, Barcelona, 2006, 11-24.
• [5] S. Y. Hong, Cryogenic Machining, U.S. Patent 5,901,623, 1999.
• [6] S. Y. Hong, Y. Ding, Cooling Approaches and Cutting Temperatures in Cryogenic Machining of Ti-6Al-4V, International Journal of Machine Tools and Manufacture 41 (2001) 1417-1437.
• [7] S. Y. Hong, Economical and Ecological Cryogenic Machining, Journal of Manufacturing Science Technology 123 (2001) 331-338.
• [8] I. S. Jawahir, O. W. Dillon Jr., Sustainable Manufacturing Processes: New Challenges for Developing Predictive Models and Optimization Techniques, Proceedings of the 1st International Conference “Sustainable Manufacturing” SM1, Montreal, 2007.
• [9] R. Ghosh, Z. Zurecki, J. H. Frey, Cryogenic Machining with Brittle Tools and Effects on Tool Life, Proceedings of the ASME International Mechanical Engineering Congress, Washington, 2003, 422-432.
• [10] F. J. Da Silva, S. D. Franco, A. R. Machado, E. O. Ezugwu, A. M. Souta Jr., Performance of Cryogenically Treated HSS Tools, Wear 261 (2006) 674-685.
• [11] K. M. C. Öjmertz, H.-B. Oskarson, Wear on SiC - whiskers reinforced ceramic inserts when cutting inconel with waterjet assistance, Tribology Transactions 42/3 (1999) 471-478.
• [12] F. Pusavec, A. Deshpande, R. M’Saoubi, J. Kopac, O. W. Dillon, I. S. Jawahir, Predictive Performance Models and Optimization for Sustainable Machining of a High Temperature Nickel Alloy, Proceedings of the 3rd CIRP International Conference “High Performance Cutting” HPC, Dublin, 2008, 355-364.
• [13] K. Weinert, I. Inasaki, J. W. Sutherland, T. Wakabayashi, Dry Machining and Minimum Quantity Lubrication, CIRP Annals – Manufacturing Technology 53/2 (2004) 511-537.
• [14] G. Byrne, B. Dornfeld, B. Denkena, Advancing Cutting Technology, CIRP Annals – Manufacturing Technology 52/2 (2003) 483-507.
• [15] F. Cus, M. Sokovic, J. Kopac, J. Balic, Model of complex optimization of cutting conditions, Journal of Materials Processing Technology 64/1 (1997) 41-52.
• [16] F. Cus, U. Zuperl, Model reference-based machining force and surface roughness control, Journal of Achievements in Materials and Manufacturing Engineering 29/2 (2008) 115-122.