Maintainability Modeling of NC Machine Tools Based on Repair Time

Yu Xia Xue; Gui Xiang Shen; Ying Zhi  Zhang; Li Quan Guo

doi:10.4028/www.scientific.net/AMR.1006-1007.494

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Maintainability Modeling of NC Machine Tools Based on Repair Time

Abstract:

According to 62 field fault data from a certain type of 8 NC machine tools, maintainability distribution model is established based on the repair time. Hypothesis testing shows that the repair times of NC machine tools fit mathematical model of lognormal distribution. This provides the basis for maintainability assessment of NC machine tool as well as the development of maintenance strategy in the future.