By mending tooth shape of the tooth profile and tooth direction of gear pair

the impact of meshing which is caused by manufacture error and deformation of loaded tooth can be lessen

so increasing the ability of loading and capability of meshing.The main parameters of the main reducer of panel turnover machine are given

and the elastic deformation of the tooth profile and tooth direction of the first order gear pair is calculated

the profiling quantity of the tooth profile and tooth direction is determined.By detecting the live practical application datum of the reducer

the good effect of the gear modification is verified.