In order to improve tooth contact quality of bevel gears by face hobbing method

the straight-line blade profile modified with arc profile and tooth meshing analysis was studied based on generating method of Oerlikon bevel gears.Firstly

the arc blade profile geometry was designed

and the arc blade edge equation was derived.On the basis of mathematical model of bevel gears by face hobbing method

the theoretical tooth surface equation of processed gear was derived.The effect of blade profile modified with arc shape on tooth surface was studied

and the modified quantity of tooth flank was calculated by the use of numerical method.The mathematical model of gears testing with alignment errors was established

and the simplified algorithm of tooth contact analysis was derived.Finally

making tooth contact analysis for Oerlikon bevel gears processed with arc blade profile

the results demonstrate that modifying tooth surface with arc blade profile by selecting appropriate radius not only can reduce risk to edge contact

lower sensitive to alignment errors

and improve bias-in contact quality

but also can revise contact areas for two tooth surfaces

respectively.