某圆柱滚子轴承内圈断裂故障原因分析及工艺优化  

Cause Analysis and Process Optimization of Fracture Fault of Cylindrical Roller Bearing Inner Rings

作　　者：张文涛[1,2] 刘凯歌 郭培锐 王梦茵 李江斌 ZHANG Wentao;LIU Kaige;GUO Peirui;WANG Mengyin;LI Jiangbin(Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471039,China;Henan Key Laboratory of High Performance Bearing Technology,Luoyang 471039,China)

机构地区：[1]洛阳轴承研究所有限公司,河南洛阳471039 [2]河南省高性能轴承技术重点实验室,河南洛阳471039

出　　处：《轴承》2021年第11期42-46,共5页Bearing

基　　金：国家自然科学基金项目(U1809221)。

摘　　要：某型发动机圆柱滚子轴承台架寿命试验中内圈断裂,经对故障件进行分析,发现故障原因为电火花加工中产生的烧伤层在轴承使用过程中萌发裂纹进而扩展导致内圈断裂。针对该故障模式,增加了500℃高温回火和电火花穿孔后手工修边工序,去除了电火花加工缺陷,改制后的轴承通过了寿命试验和过载能力考核。The inner rings of cylindrical roller bearings of an engine are fractured during bench life test.Through analysis of fault parts,the cause of fault is that the burn layers generated during electrical discharge machining initiates cracks and then propagates during use of the bearings,resulting in fracture of inner rings.In view of fault mode,500℃high temperature tempering and manual trimming process after electric discharge drilling are added to remove electrical discharge machining defects,and the improved bearings pass life test and overload capacity assessment.

关 键 词：滚动轴承 圆柱滚子轴承 高温轴承钢 内圈 电火花线切割 电火花穿孔 烧伤 

分 类 号：TH133.33[机械工程—机械制造及自动化] TH162.1