Reliability is the key performance indicator for remanufactured machine tools to be approved by customers. Reliability allocation is an important task that needs to be done in the design phase of remanufactured machine tools to ensure that remanufactured products meet the reliability target requirements. A reliability allocation method for remanufactured machine tools is proposed based on fuzzy evaluation importance and failure influence of each component. The importance of each component is evaluated by five indicators such as complexity of structure, maturity of technology, criticality of fault, difficulty of maintenance, and severity of service condition, in which their weights are determined by the method of analytic hierarchy process (AHP). Failure influence is determined by the proportion of downtime caused by each component in total downtime of machine tools. Finally, the proposed method is illustrated in a numerical case study of NC lathe remanufacturing.

可靠性是待客户认可的再制造机床的关键性能指标。可靠性分配是再制造机床设计阶段需要完成的一项重要任务，以确保再制造产品满足可靠性目标要求。提出了一种基于模糊评价重要性和各部件故障影响的再制造机床可靠性分配方法。每个组件的重要性通过五个指标进行评估，例如结构的复杂性，技术的成熟度，故障的严重性，维护的难度以及服务条件的严重性，其中它们的权重由层次分析法（AHP）确定。失效影响取决于每个组件导致的停机时间占机床总停机时间的比例。最后，在数控车床再制造的数值案例研究中说明了该方法。