Modern Manufacturing Engineering ›› 2018, Vol. 458 ›› Issue (11): 119-125.doi: 10.16731/j.cnki.1671-3133.2018.11.021

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Optimum reliability model and analysis for CNC grinding machine

Luo Jing1,2, Chen Yifan1,2, Zhang Genbao3, Duan Shuming1   

  1. 1 College of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China;
    2 Ministry of Education Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Chongqing University of Technology,Chongqing 400054,China;
    3 College of Mechanical Engineering,Chongqing University,Chongqing 400044,China
  • Received:2017-12-07 Online:2018-11-20 Published:2019-01-07

Abstract: Reliability evaluation is the primary task of reliability work,in order to avoid the subjectivity in the process of reliability modeling and replace the cumbersome calculation process,firstly,the Inter-Quartile Range(IQR) method is used to determine the outliers of the fault data,and then the MINITAB software is used to optimize the reliability model of the effective data,finally,the linear correlation and K-S test are put forward to verify the accuracy of the method.Meanwhile,in order to improve the reliability level of CNC grinder,the Failure Mode and Effects Analysis(FMEA) and Fault Tree Analysis(FTA) methods are used to analyze the reliability of the machine tools,and effective reliability improvement measures for key failure factors are put forward.The above methods are effectively applied in the project,which play important roles in improving the reliability level of the machine tool and improving the reliability design in the future.

Key words: CNC grinding machine, reliability modeling, Inter-Quartile Range(IQR), MINITAB software, reliability analysis

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