中国机械工程2016，Vol.27Issue(14)：1936-1941,6.DOI:10.3969/j.issn.1004-132X.2016.14.016
基于FMECA修正危害度的数控车床关键子系统可靠性分配
Reliability Allocation of Key Subsystems of CNC Lathes Based on FMECA Modified Criticality
摘要
Abstract
Based on FMECA theory,taking the modified criticality values of key subsystems of CNC lathes as allocation criteria,the reliability allocation was conducted.By making severity nonlin-ear,considering the cost of reducing failure rate,an expression of modified criticality was obtained through combining them,and the importance of failure mode effect level through design process could be vividly reflected.Criticality analysis theory was explained,and then reliability allocation methods were pointed out based on traditional and modified criticality respectively.Finally,a real case of relia-bility allocation of key subsystems of a CNC lathe was presented applying the methods illustrated be-fore and the comparison between traditional method and modified criticality method was conducted. Results show that the reliability allocation method based on modified criticality herein gives full con-sideration to effects of subsystems with high severity and difficulty level of reducing failure rates, which can guide reliability design based on results of reliability allocation effectively.More attention must be paid to subsystems with high criticality values and low reliability in aspects such as outsourc-ing,design,processing and assembling so as to ensure that mean time between failures(MTBF)of CNC lathes can meet the requirements.关键词
故障模式/影响及危害性分析/数控车床/修正危害度/可靠性分配Key words
failure mode/effects and criticality analysis(FMECA)/CNC lathe/modified criticali-ty/reliability allocation分类
通用工业技术引用本文复制引用
王昊,张义民,杨周,周雁迅..基于FMECA修正危害度的数控车床关键子系统可靠性分配[J].中国机械工程,2016,27(14):1936-1941,6.基金项目
国家自然科学基金资助项目(51135003,U1234208) （51135003,U1234208）
国家重点基础研究发展计划(973计划)项目(2014CB046303) （973计划）
国家科技重大专项(2013ZX04011-011) （2013ZX04011-011）
机械系统与振动国家重点实验室开放课题资助项目(MSV201402) （MSV201402）
中央高校基本科研业务费专项资金资助项目(N130503002) （N130503002）
辽宁省高等学校优秀人才支持计划资助项目(LJQ2014030) （LJQ2014030）
