Abstract: Gears are the core transmission elements in machine for manufacturing. Under the same material properties, the excellent surface quality and accuracy characteristics will be in favor of improving the service characteristics and the service life of gear. It is the primarily means to adopt finishing and polishing to improve the surface quality and the accuracy of gear. Owing to the outstanding advantages of finishing efficiency and capability, electrochemical mechanical finishing (ECMF) is used to finish the gear to improve surface quality and accuracy quality of gears. The generative ECMF method is put forward, the influence of processing parameters on the surface roughness is studied and the influence of the generative method on the accuracy of gear tooth profile, in between teeth and tooth lead direction is studied experimentally. The results indicate that for cylindrical gears, the surface roughness Ra is reduced from more than 1.0 μm to less than 0.1 μm. After finishing, the dimensional accuracy between teeth can be enhanced 2 grades compared with the technical specifications before finishing, As well, the accuracy of gear tooth profile and tooth lead direction may be also improved.

Key words: Accuracy, Electrochemical machining, Finishing, Gear, Surface quality