According to the actual process of worm grinding wheel forming helical gear
the parameter mathematics model of the surface of helical gear and fillet is established.The helical gear tooth profile modification curve is achieved by modifying the profile of worm grinding wheel.By controlling the cutter radical feeding
the tooth profile of helical gear axial modification is achieved.By using VS 2008programming
the calculation of gear tooth surface
tooth root surface equation and the software interface design is accomplished.The feasibility of the design method is illustrated with an example.