摘要
为提高差速器半轴齿轮的抗疲劳性能与服役寿命,针对齿轮齿根断裂失效问题进行原因分析和工艺优化。通过静扭强度实验、可靠性实验及冲击实验发现,齿根断裂失效原因为齿根折叠缺陷导致应力集中。结合ANSYS应力仿真与金相分析,提出了模具优化方案,保持温锻模圆角半径与冷整形模圆角半径参数一致,降低了齿根缺陷深度;创新齿轮结构设计,采用封闭齿轮大端、齿根倒圆角以及提高齿轮背椎壁厚等措施。实验验证结果表明,优化后齿根处的折叠缺陷深度在0.02 mm以内,有效改善了齿根缺陷,提高了半轴齿轮的齿根弯曲强度和抗疲劳性能。
In order to improve the fatigue resistance and service life of differential half shaft gear,the cause analysis and process optimiza-tion were carried out for the tooth root fracture failure problem of the gear,and through static torsion strength test,reliability test and im-pact test,it was found that the cause of tooth root fracture failure was stress concentration caused by tooth root folding defects.Then,com-bining ANSYS stress simulation and metallographic analysis,a die optimization scheme was proposed to keep the parameters of the warm forging die fillet radius consistent with the cold shaping die fillet radius,and the depth of tooth root defects was reduced.Furthermore,the gear structure design was innovated by adopting the measures such as enclosing the large end of the gear,filleting the tooth root and in-creasing the wall thickness of the gear back cone.The test verification results show that after optimization,the depth of folding defects at the tooth root is within 0.02 mm,which effectively improves the tooth root defects and enhances the tooth root bending strength and fatigue resistance of the half shaft gear.
作者
左彪
童兴
袁静
孙万利
周智慧
王会林
张朝磊
Zuo Biao;Tong Xing;Yuan Jing;Sun Wanli;Zhou Zhihui;Wang Huilin;Zhang Chaolei(Jiangsu Airship Co.,Ltd.,Taizhou 225300,China;Shunde Innovation School,University of Science and Technology Beijing,Foshan 528399,China;Technology Center,Zenith Steel Group Co.,Ltd.,Changzhou 213011,China;Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China)
出处
《锻压技术》
北大核心
2025年第6期173-179,共7页
Forging & Stamping Technology
