According to the principle of gear meshing

the simulation model of the transmission is built based on MASTA.Using gear micro geometry module of the MASTA software

the micro shape parameters of gear is optimized.Moreover

the methods of determining gear tooth surface modification amount are discussed.The study shows that using the MASTA software for the reasonable design and optimization of the micro shape parameters

the slanting load of tooth surface when gear driving can be improved

the contact stress of gear tooth surface is reduced and the transmission quality as well as the carrying capacity of the gear pair are enhanced.