Original Article

Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information

  • Zhaojun Yang ,
  • Jinyan Guo ,
  • Hailong Tian ,
  • Chuanhai Chen ,
  • Yongfu Zhu ,
  • Jia Liu
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  • 1. China Key Laboratory of CNC Equipment Reliability, Ministry of Education, Changchun 130025, China;
    2. School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China;
    3. College of Materials Science and Engineering, Jilin University, Changchun 130025, China;
    4. School of Electrical and Mechanical Engineering, Changchun University of Science and Technology, Changchun 130025, China

Received date: 2020-01-13

  Revised date: 2020-12-16

  Online published: 2021-08-09

Supported by

Supported by National Natural Science Foundation of China (Grant Nos. 51675227, 51975249), Jilin Province Science and Technology Development Funds (Grant Nos. 20180201007GX, 20190302017GX), Technology Development and Research of Jilin Province (Grant No. 2019C037-01), Changchun Science and Technology Planning Project (Grant No. 19SS011), and National Science and technology Major Project (Grant No. 2014ZX04015031)

Abstract

Heavy-duty machine tools are composed of many subsystems with different functions, and their reliability is governed by the reliabilities of these subsystems. It is important to rank the weaknesses of subsystems and identify the weakest subsystem to optimize products and improve their reliabilities. However, traditional ranking methods based on failure mode effect and critical analysis (FMECA) does not consider the complex maintenance of products. Herein, a weakness ranking method for the subsystems of heavy-duty machine tools is proposed based on generalized FMECA information. In this method, eight reliability indexes, including maintainability and maintenance cost, are considered in the generalized FMECA information. Subsequently, the cognition best worst method is used to calculate the weight of each screened index, and the weaknesses of the subsystems are ranked using a technique for order preference by similarity to an ideal solution. Finally, based on the failure data collected from certain domestic heavy-duty horizontal lathes, the weakness ranking result of the subsystems is obtained to verify the effectiveness of the proposed method. An improved weakness ranking method that can comprehensively analyze and identify weak subsystems is proposed herein for designing and improving the reliability of complex electromechanical products.

Cite this article

Zhaojun Yang , Jinyan Guo , Hailong Tian , Chuanhai Chen , Yongfu Zhu , Jia Liu . Weakness Ranking Method for Subsystems of Heavy-Duty Machine Tools Based on FMECA Information[J]. Chinese Journal of Mechanical Engineering, 2021 , 34(1) : 17 -17 . DOI: 10.1186/s10033-021-00539-6

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