某变速器中间轴齿轮断齿失效分析  

Broken Gear Failure Analysis of a Transmission Intermediate Shaft Gear

作　　者：李本军 王东霞[2] 崔东伟 王阳光 LI Benjun;WANG Dongxia;CUI Dongwei;WANG Yangguang(Haima Motor Co.,Ltd.,Zhengzhou 450005,China;Zhengzhou university of Finance and Economics,Zhengzhou 450005,China)

机构地区：[1]海马汽车有限公司,郑州450005 [2]郑州财经学院,郑州450005

出　　处：《机械工程师》2020年第3期147-149,共3页Mechanical Engineer

摘　　要：介绍了齿轮轴常见的失效形式,针对试验中失效零件,对其进行宏观断口检查、金相组织、硬度、磨削烧伤等分析,结果表明:齿轮齿根应力集中形成多源疲劳断裂,最终导致断齿。同时提出改进措施,有效解决了断齿问题,为解决变速器齿轮轴断齿问题提供思路。The common failure modes of gear shafts are introduced.Macro fracture inspection,metallographic structure,hardness,grinding burns and other analysis are performed on the failed parts during the test.The results show that the stress concentration of the gear root causes multi-source fatigue fracture,which eventually leads to broken teeth.Improvement measures are proposed to effectively solve the problem of broken teeth and provide ideas for solving the problem of broken gear teeth of the transmission gear shaft.

关 键 词：断口检查 磨削烧伤 断齿 疲劳断裂 

分 类 号：TH132.41[机械工程—机械制造及自动化]