An improved FMECA for feed system of CNC machining center based on ICR and DEMATEL method

The Failure Mode, Effects and Criticality Analysis (FMECA) has been widely applied in the reliability research of machining centers in recent years. However, conventional FMECA does not take opinions of different team members or the relationship between the modes and causes of failure into account w...

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Bibliographic Details
Published inInternational journal of advanced manufacturing technology Vol. 83; no. 1-4; pp. 43 - 54
Main Authors Wang, Xiaofeng, Zhang, Yingzhi, Shen, Guixiang
Format Journal Article
LanguageEnglish
Published London Springer London 01.03.2016
Springer Nature B.V
Subjects
CAE) and Design
Computer-Aided Engineering (CAD
Decision making
Decision theory
Engineering
Failure
Failure analysis
Failure modes
Feed systems
Industrial and Production Engineering
Machine tools
Machining
Machining centres
Mechanical Engineering
Mechanical systems
Media Management
Numerical controls
Original Article
Reliability analysis
FMECA
Feed system
Group decision-making
DEMATEL
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Summary:The Failure Mode, Effects and Criticality Analysis (FMECA) has been widely applied in the reliability research of machining centers in recent years. However, conventional FMECA does not take opinions of different team members or the relationship between the modes and causes of failure into account when considering the assignment of criticality. Thus, an improved FMECA (IFMECA) is proposed to overcome the disadvantages. The IFMECA method applied group decision-making theory to effectively combine every team member’s evaluation. Subsequently, weights of the factors were determined based on the combination of entropy and expert evaluation. Failures were then prioritized by decision-making trial and evaluation laboratory (DEMATEL) method. In this paper, improved criticalities (ICR) were calculated and failures of feed systems were prioritized by IFMECA based on the failure data of the feed system. According to the rank of failure modes obtained through IFMECA, it is observed that vibration or oscillation, motion parts output failure, and inaccurate re-home have more negative impacts on the feed system. Furthermore, this paper asserts that IFMECA method could also be applied to analyze other complex mechanical systems.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-015-7551-y