基于FMECA的缸盖机加生产线故障分析

Failure Analysis of Engine Head Product Line Based on FMECA

通过对国内某汽车厂商发动机缸盖生产线故障情况的跟踪,建立该生产线故障数据库,对其进行了部件层级的故障模式及影响危害度分析。首先定义生产线系统模型,划分约定层级并明确故障判据,从生产功能实现的角度将故障部位分成十个子系统,对比了各子系统、工序设备和故障源部件的故障频次。其次对生产线设备故障原因分析归纳,最后给出系统故障频发部位的故障模式和危害度分析结果。找出了发动机缸盖生产线的薄弱环节,提出改善建议和措施,为发动机缸盖生产线可靠性管理和改进设计提供了依据。

Based on the failure data of engine head product line, a method of failure mode effects and criticality analysis of the failure parts were performed. The target system was divided into established level and the failure criterion was clarified. By the comparison about failure frequency of each process of the production line, the failure locations were divided into ten subsystems. The failure reasons of each failure mode were summarized. According to failure mode effect and criticality analysis result of high - frequency parts, the weak parts of the production line were pointed out. Improvement suggestions and measures were proposed, which made contribution to the reliability management of the engine head product line.