Influence of shot peening and electropolishing on bending fatigue strength of gear
1.China Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100044, China; 2.Computer and Information Technology Academy, Nanyang Normal University, Nanyang, Henan 473061, China
Abstract：To improve the bending fatigue strength of involute gear, the influences of shot peening intensity, coverage and electropolishing on surface integrity and bending fatigue limit were investigated. Based on meshing theory and ANSYS Parametric Design Language(APDL), the parametric finite element model of gear was established.The bending fatigue strength of gear teeth was calculated and analyzed by ANSYS／FE-SAFE software.The results show that carburizing gear bending fatigue limit from software simulation is larger than test result. There are optimum technic parameters for shot peening, and high intensity and coverage may be prejudicial to bending fatigue limit. Electropolishing after shot peening can further improve surface integrity to increase the bending fatigue strength of involute gear, but the strengthening effect is determined by the initial shot peening parameter.
2013, Vol. 34 
