滚针轴承试验中应力集中所致剥落现象分析及试验优化  

Flaking Phenomenon Analysis Caused by Stress Concentration in Needle Roller Bearing Test and Test Optimization

作　　者：张振潮[1] 任文亮[1] 铁晓艳 

机构地区：[1]国家轴承质量监督检验中心,河南洛阳471039 [2]洛阳轴研精密机械有限公司,河南洛阳471039

出　　处：《轴承》2014年第2期26-29,共4页Bearing

摘　　要：针对滚针轴承试验中滚针端部过早出现剥落的现象,经分析与理论推证认为是载荷偏大引起轴弯曲变形,滚针边缘产生应力集中所致。改进方案试验结果表明,使用阶梯轴能增强轴的弯曲刚度,满足试验要求,另外滚针全长上最大偏斜角应小于0.001 rad。Aiming at the early flaking phenomenon at end of needle roller in needle roller bearing test,the bending de-formation of shaft is caused by higher load and the stress concentration is appeared at edge of needle roller by the analy-sis and theoretical derivation.The improved test results show that the bending rigidity of shaft is enhanced by using the stepped shaft,which can meet the test requirements.The maximum deflection-angle of needle roller full length should be less than 0.001 rad.

关 键 词：滚针轴承 寿命试验 可靠性 剥落 

分 类 号：TH133.33[机械工程—机械制造及自动化]