汽油发动机轴瓦拉伤问题分析

Gasoline Engine Bearings Strain Problem Analysis

针对某工厂发动机产品审核中出现的主轴瓦、连杆瓦拉痕、轴瓦中有小黑点等现象,通过问题故障树分析、对比验证分析、清洁度检验、电镜分析验证等方法,得出主轴瓦划伤原因是由轴瓦安装工装杂质带入、手套杂质带入导致;连杆瓦划伤原因是连杆清洁度较差,连杆大头端结合面杂质在装配的过程中掉入连杆轴颈导致,为某工厂解决连杆瓦划伤问题的提供了一种详细方案。

Aiming at the black dot phenomenon has a factory engine product audit in the main bearing, connecting rod bearing marks, in Wallachia, the problem of fault tree analysis, comparison analysis, cleanliness testing, SEM analysis verification method, the main bearing scratch reason is composed of a shaft tile installation tooling, impu- rities impurities into gloves lead; connecting rod connecting rod is scratch reason cleanliness poor, combined with the connecting rod large end surface impurities lead to the crankpin fall in the assembly process, provides a de- tailed plan for a factory to solve the problem of connecting rod scratch.