In order to control tooth meshing performance freely

a kind of tooth surface topology modification method for pinion was proposed. By means of second-order surface approximation for tooth surface deviations

the tooth surface topology modification can be divided into five parts: spiral angle correction

pressure angle correction

lengthwise curvature correction

profile curvature correction and longitudinal twist correction

by changing five modification factors the pinion tooth surface topology can be controlled freely. On this basis

the modified model between tooth surface deviations and processing parameters correction was established

and the pinion processing parameters allowing to acquire modified tooth surface can be calculated by constructing sensitivity matrix and least squares method. The meshing analysis for a pair of spiral bevel gears was carried out. The results demonstrate that by selecting lengthwise curvature modification factor 0.0001

profile curvature modification factor 0.0005

longitudinal twist modification factor 0.0003

the transmission error magnitude is changed to -25.60″

and the contact path orientation is changed to 54.7° after tooth surface topology modification

and the meshing performance is improved compared with initial result. The rolling test result agrees well with simulation result

verifying the effectiveness of modification method.