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Sustainability 2019, 11(2), 315; https://doi.org/10.3390/su11020315

Reducing the Risks during the Purchase of Five-Axis CNC Machining Centers Using AHP Method and Fuzzy Systems

1
Department of Engineering and Management, Engineering Faculty, Lucian Blaga University of Sibiu, Victoriei 10, 550024 Sibiu, Romania
2
Academy of Romanian Scientists, 010071 Bucharest, Romania
3
Department of Industrial Machines and Equipment, Engineering Faculty, Lucian Blaga University of Sibiu, Victoriei 10, 550024 Sibiu, Romania
*
Author to whom correspondence should be addressed.
Received: 4 December 2018 / Revised: 24 December 2018 / Accepted: 26 December 2018 / Published: 9 January 2019
(This article belongs to the Collection Risk Assessment and Management)
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Abstract

Nowadays, companies are in the process of renewing their manufacturing lines by equipping them with modern five-axis CNC (computer numerical control) machining centers. The decision to select between different five-axis CNC machining centers, with similar technological capabilities is a difficult process, so the main goal of this work was to develop a method for assisting it. The proposed approach relies on seven technical criteria, four quantitative ones (traverse speed, thrust, spindle power, and spindle speed) which can be expressed by crisp numerical values, while the other three (flexibility, operation easiness, and setup time) are qualitative ones. The analytic hierarchy process (AHP) was used for ordering four variants of five-axis CNC milling machining centers. The qualitative criteria were processed using fuzzy systems to be expressed by crisp numerical values, suitable for AHP. Finally, the four variants of five-axis CNC milling machining centers were hierarchized and the best one was chosen. A sensitivity analysis was also unfolded to certify the robustness of the AHP. View Full-Text
Keywords: AHP; five-axis CNC milling machining centers; equipment selection; fuzzy systems AHP; five-axis CNC milling machining centers; equipment selection; fuzzy systems
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Cioca, L.-I.; Breaz, R.-E.; Racz, S.-G. Reducing the Risks during the Purchase of Five-Axis CNC Machining Centers Using AHP Method and Fuzzy Systems. Sustainability 2019, 11, 315.

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