摘 要 摩托车连杆滚针轴承的运动及受力状态比较复杂，现针对某型号发动机的连杆滚针轴承失效样品作失效分析。分析表明承受载荷过大，滚针的表面应力分布不均，保持架和连杆的结构强度和耐磨性不足等原因是连杆滚针轴承发生早期失效的主要因素。针对产品的失效原因，提出滚针的凸度技术以消除滚针的边缘效应，提出保持架和连杆的热处理技术以改善保持架和连杆的抗疲劳能力和耐磨性等工艺改进方案，协助生产厂家改进产品性能并提高其使用寿命。关键词 滚针轴承；失效分析；工艺改进；摩托车Abstract Motion of motorcycle connecting rod needle bearing and force it bears are very complicated. For a model of the engine connecting rod needle bearing failure samples for failure analysis. Analysis showed that the bearing load is too large, uneven distribution of needle surface stress, the cage and the connecting rod of a lack of structural strength and wear resistance due to early failure of the connecting rod needle bearing main factors. Reasons for product failure occurs, raise the crown needle technology, heat treatment of the cage and the connecting rod technology, used to improve the needle of the "Edge effect" and to raise the cage and the connecting rod's resistance to fatigue and wear resistance, etc. process improvement program to help manufacturers improve product performance and increase its service life.Keywords Needle roller bearings Failure Analysis Process Improvement motorcycle目 录摘 要..........................................................................................................................................IAbstract...........................................................................................................................................II第 1 章 绪论....................................................................................................................................11.1 课题的提出..............................
