ZHOU ZHI-feng，LIU Wei，WANG Jing
（School of Mechatronics，Electronic and Control Engineering，Beijing Jiaotong University，Beijing 100044，China）
Abstract：In order to solve the problems of different modification curves leads to different gear modification effects，parametric equationsof involute and tooth profile modification curve were derived. Then three-dimensional models of standard involute spur gear and profilemodifying gear were built using Pro/E. Finally，finite element analysis of the models was carried out by using transient dynamic module ofANSYS Workbench. The tooth face contact stress curve of involute spur gear and modification gear in meshing process was obtained
through simulation. The results indicate that Walker modification curve has better effects than linear modification curve during the periodof alternating single and double teeth meshing and teeth coming into or out of contact in gear transmission process. However，both of thetwo curves lead to the reduction of gear coincidence degree and the growing of single-tooth mesh region，which provides a numericalexperimental basis for the designing of modification gear.
Key words：gear modification；meshing impact；finite element analysis（FEM）