基于ISM与FMECA的加工中心故障分析

故障分析是实现加工中心可靠性水平增长的重要环节,因此提高故障分析的准确性至关重要.鉴于此,本文首先充分考虑加工中心故障子系统间影响关系,基于ISM法构建递阶结构模型,使得关联故障子系统间复杂影响关系层次化,以求得深层故障子系统,确定可靠性改进薄弱环节.其次对所得薄弱环节进行FMECA分析,进而确定关键故障模式,为提高加工中心可靠性奠定基础.最后以某系列加工中心现场故障数据为研究对象进行实例研究,证明了ISM和FMECA法在加工中心故障分析中的准确有效性.

Failure Analysis of Machining Center Based on ISM and FMECA

Failure analysis is an important part of realizing the growth of machining center reliability level, so it is important to improve the accuracy of failure analysis. In view of this, this paper first considered the relationship and influence among failure subsystem elements of machining center, constructed the hierarchical structure model based on ISM method, made clear the class of interrelated failure subsystem, found out the deep failure subsystem elements and determined the weak link in the reliability improvement. Secondly, it analyzed the subsystem with FMECA, and determined the critical failure modes of the subsystem and laid a foundation for improving the reliability of machining center. Finally, it did the case study based on the field failure data of a series of machining center. The result has proved that the above method is accurate and effective in the failure analysis of machining center.