Effect of key factors on cold orbital forging of a spur bevel gear  

作　　者：庄武豪 董丽颖 

机构地区：[1]School of Materials Science and Engineering,Wuhan University of Technology [2]School of Automotive Engineering,Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology

出　　处：《Journal of Central South University》2016年第2期277-285,共9页中南大学学报（英文版）

基　　金：Project(51105287)supported by the National Natural Science Foundation of China;Project(IRT13087)supported by Innovative Research Team Development Program of Ministry of Education of China;Project(2012-86)supported by High-End Talent Leading Program of Hubei Province,China;Project(2014CFB876)supported by Natural Science Foundation of Hubei Province;China

摘　　要：Cold orbital forging is an advanced spur bevel gear forming technology. Generally, the spur bevel gear in the cold orbital forging process is formed by two steps: the preforming step and the final step. Due to the great importance of the final step to gear forming and its complication with interactive factors, this work aims at examining the influence of key factors on the final step in cold orbital forging of a spur bevel gear. Using the finite element(FE) method and control variate method, the influence rules of four key factors, rotation velocity of the upper tool, n, feeding velocity of the lower tool, v, tilted angle of the upper tool, γ, friction factor between the tools and the billet, m, on the geometry and the deformation inhomogeneity of the cold orbital forged gear are thoroughly clarified. The research results show that the flash becomes more homogeneous with increasing v, increasing m, decreasing n or decreasing γ. And the deformation of the gear becomes more homogeneous with increasing v, decreasing n or decreasing γ. Finally, a corresponding experiment is conducted, which verifies the accuracy of FE simulation conclusions.Cold orbital forging is an advanced spur bevel gear forming technology. Generally, the spur bevel gear in the cold orbital forging process is formed by two steps： the preforming step and the final step. Due to the great importance of the final step to gear forming and its complication with interactive factors, this work aims at examining the influence of key factors on the final step in cold orbital forging of a spur bevel gear. Using the finite element（FE） method and control variate method, the influence rules of four key factors, rotation velocity of the upper tool, n, feeding velocity of the lower tool, v, tilted angle of the upper tool, γ, friction factor between the tools and the billet, m, on the geometry and the deformation inhomogeneity of the cold orbital forged gear are thoroughly clarified. The research results show that the flash becomes more homogeneous with increasing v, increasing m, decreasing n or decreasing γ. And the deformation of the gear becomes more homogeneous with increasing v, decreasing n or decreasing γ. Finally, a corresponding experiment is conducted, which verifies the accuracy of FE simulation conclusions.

关 键 词：cold orbital forging FE modeling key factors spur bevel gears 

分 类 号：TH132.41[机械工程—机械制造及自动化]