吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (5): 1519-1526.doi: 10.13229/j.cnki.jdxbgxb201705025

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Determination of average maintenance time of CNC machine tools under minimum failure rate

SHEN Gui-xiang, ZENG Wen-bin, ZHANG Ying-zhi, WU Mao-kun, ZHENG Yu-bin   

  1. College of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
  • Received:2016-08-02 Online:2017-09-20 Published:2017-09-20

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Abstract: In order to reasonably compute the average maintenance time of combination of CNC machine tools, a calculation method of the average maintenance time is developed based on the system component failure rate and maintenance time model. First, according to the subsystem fault information of the combination of CNC machine, the mean rank method is introduced to establish the time related subsystem failure rate model. Then the system failure rate model of the combination of CNC machine tools is derived. Finally, combining the subsystem maintenance time function, the average maintenance time model of the combination of CNC machine tools is established, and the average maintenance time is determined by the minimum number of failures. This research may provide reference for system maintenance time design and maintenance planning.

Key words: machine tool, average maintenance time, minimum failure rate, Johnson method

CLC Number: 

  • TG659
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