ACCURATE MODELLING OF SPIRAL BEVEL GEARS BASED ON FUNCTION-TO-FORM MAPPING Z.-G. Xu, K.-Y. Su, J.-F. Zhu and W.-M. Liu Abstract A design method of function-to-form mapping is proposed for spiral bevel gear. The rules are established. The mathematical model of tooth surface of the spiral bevel gear is deduced, the boundary of the tooth surface is determined. The intelligent design system of spiral bevel gears is developed on a commercial CAD software SINOVATION. The surface deviation method is used to test the solid model of the spiral bevel gear. The results show that the tooth surface model is accurate, the modeling method are feasible, intelligent and efficient. Keywords: comp