›› 2012, Vol. 42 ›› Issue (05): 1157-1162.

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Criticality analysis for CNC turret adopting importance and fuzzy reasoning

ZHANG Ying-zhi1, ZHENG Shan1, SHEN Gui-xiang1, ZHENG Rui2, GU Dong-wei1, NIU Xu-lei1   

  1. 1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022,China;
    2. Group No. 716 Research Institute,China Shipbuilding Industry Corporation, Lianyungang 222006,China
  • Received:2012-02-21 Online:2012-09-01 Published:2012-09-01

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Abstract: Based on the most popular standard called MIL-STD-1629A from the U.S. Department of Defense, an improved FMECA method was presented to investigate the CNC turret. To avoid the ambiguity of subjective evaluation, the importance degree was used to judge severity, weighting factors of experts were introduced to determinate the criticality, and a fuzzy logic-based expert system was adopted to evaluate the risk level comprehensively. The weak link affecting turret system reliability was found out, which provides a scientific basis for improved design and maintenance policy.

Key words: machine tool, importance degree, weighting factor, fuzzy reasoning

CLC Number: 

  • TG659
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