Failure Mode And Effect Analysis For Cnc Machines Used In Gg Valves Industry

Raj Kumar Salvi, Chitranjan Agarwal, B. P. Nandawana, M. A. Saloda

Abstract


Failure Mode and Effects Analysis (FMEA) has been extensively used for examining potential failures in many industries. Unlike the conventional FMEA, the risk factors of Severity (S), Occurrence (O) and Detection (D) of each failure mode are evaluated by linguistic terms in this research, which make the results more useful and practical. Both conventional and Grey Relational Analysis approaches are applied in FMEA, and Grey Relational Analysis is applied to calculate the Grey Relational Coefficient. The rankings of the failure modes are both determined by conventional FMEA and the Grey Relational Analysis. An example of CNC machine failure is provided, and the results show that the evaluation of failure modes by both conventional FMEA and Grey Relational Analysis. These theories are proposed in this paper helps to enhance the reliability of the prediction, and the predicted ranking of CNC machines failure can be used for better decision-making concerning inspection and maintenance.

Keywords: CNC machine failures; FMEA; RPN; Grey Relational Analysis.

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References


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