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Safety 2019, 5(1), 14; https://doi.org/10.3390/safety5010014

Evaluating Safety Systems for Machine Tools with Computer Numerical Control using Analytic Hierarchy Process

1
Department of Industrial Machines and Equipment, Engineering Faculty, Lucian Blaga University of Sibiu, Victoriei 10, 550024 Sibiu, Romania
2
Department of Engineering and Management, Engineering Faculty, Lucian Blaga University of Sibiu, Victoriei 10, 550024 Sibiu, Romania
3
Academy of Romanian Scientists, 010071 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Received: 31 December 2018 / Revised: 26 February 2019 / Accepted: 26 February 2019 / Published: 7 March 2019
(This article belongs to the Special Issue Design and Development of Safety Production Management)
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Abstract

Computer numerical control (CNC) machine tools are complex production systems with fully automatic machine parts. Nowadays, high feed rates and machining speeds are used during the machining process. Human operators are still needed to set-up the machine, load/unload workpieces and parts, load the machining code, and supervise the machining process. The operators work in an environment where automated high-speed motions occur, and consequently, CNC machine tools have to be equipped with safety systems. The approach presented in this paper was to evaluate the main safety systems of CNC machine tools based upon the analytic hierarchy process (AHP). The analyzed systems were divided into six main categories and compared pairwise using five criteria proposed by the authors. The approach and the obtained results significantly relied upon the situation found at the industrial company used as a benchmark for the research. The analysis reveals that, among considered safety devices, manually operated controls are the most efficient ones. Finally, a sensitivity analysis was conducted to test the stability of the AHP solution. View Full-Text
Keywords: analytic hierarchy process (AHP); computer numerical control (CNC); machine tools; machining process; safety systems analytic hierarchy process (AHP); computer numerical control (CNC); machine tools; machining process; safety systems
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Racz, S.-G.; Breaz, R.-E.; Cioca, L.-I. Evaluating Safety Systems for Machine Tools with Computer Numerical Control using Analytic Hierarchy Process. Safety 2019, 5, 14.

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