| Summary: | In order to accurately describe and explore the relationship characteristics between the faults of the numerical control equipment and identify weak links in reliability, a new method for associated fault analysis of CNC equipment based on social network analysis (SNA) are proposed. First, an associated fault directed graph is established based on the statistical analysis on the associated faults of CNC equipment; then, a social network analysis method is introduced in consideration of the network attribute, the relationship between faults and the key subsystem affecting the reliability of CNC equipment are analyzed from three levels of association analysis, element analysis and matrix analysis, and then weak links in reliability of CNC equipment are identified; and finally, a series of fault records of a machining center production site are used as research objects for empirical research ,thereby verifying the scientific validity of the method. Abbreviations: CNC: Computer Numerical Control; FMECA: Failure Mode Effect and Criticality Analysis; SNA: Social Network Analysis; LAN: Local Area Network
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