Abstract: Based on the relation between tooth deformation and the transmission load of spur gears, an equation is presented for the correlation between gear static transmission error and the total amount of profile modification of meshing teeth under a specific load. To determine the profile modification parameters for gears with manufacturing errors, a principle is put forward, that is, the maximum profile modification of meshing teeth in designing gears should enable the elimination of the meshing interference caused by manufacturing errors and the variation amount of gear static transmission error should be kept within as a narrow range as possible. Furthermore, formula is provided for determining the profile modification parameters of meshing teeth for spur gears with manufacturing error. Corresponding method for determining the parameters is also proposed. Numerical simulation of system dynamic response indicates that the approach has good effects on vibration reduction of gear transmission.

Key words: Gear transmission, Spur gears, Static transmission error, Tooth profile modification, Vibration