In order to improve the sensitivity of spiral bevel gears caused by assembly errors

the optimization total curvature of different surface was applied from the tooth surface topology structure.The total curvature of two meshing surface contact points which orients lengthwise

can be considered as sensitivity coefficient

and the effect of reference point sensitivity coefficient of local synthesis and location parameters was investigated.The machine-tool settings of pinion which reduce sensitivity of assembly errors can be obtained by the optimization of the first order gear ratio

contact path direction

sencond order modified and third roll coefficient.The numerical example reveals that sensitivity coefficients of whole mesh cycle is controlled in comparatively small range

the amplitude and symmetry of transmission curve can be achieved to design requirements

the meshing quality can be improved.