Abstract: According to the mesh theory of noncircular gears, the grinding of elliptical gears with CNC conical wheel gear grinding machine is studied. The machine structure and movement form of two machining methods, named grinding wheel transfer type and grinding wheel fixture type, are proposed. The movement relation mathematical models of elliptical gears grinding process are built. Because each tooth of elliptical gear is different from others, generating length of which is also dif-ferent. Based on analyzing the generating and indexing move-ment, the universal generating length formula of each tooth is proposed. Basic machining parameters of each tooth on two types machine are computed using practical example. The dy-namic simulation of generating track is given. The research results show that the grinding of elliptical gears with CNC conical wheel gear grinding machine is feasible.

Key words: CNC, Conical wheel, Elliptical gears, Gear grinding machine, Generating, Grinding