For the tooth profile “concave” errors in shaving

a gear shaving mesh analysis model was established to study the gear shaving mesh transmission characteristic with different contact ratios. An optimal design of shaving cutter was proposed. The impact of gear shaving mesh transmission characteristic with different contact ratios on “concave” error was obtained by shaving experiment. And the correctness of the optimal design was verified. Results showed that: increasing the contact ratio can decrease the curve amplitude of transmission error and instantaneous ratio

but excessive increase led to local oscillation of curve and unstable drive. Thus the “concave” error was formed significantly. The contact deformation caused by gear shaving mesh status with different contact-ratios was the main factor affecting the gear shaving mesh characteristic. The better gear shaving mesh transmission characteristic meant the smaller shape and total deviation of gear gets. The optimal design of shaving cutter based on gear shaving mesh transmission characteristic can reduce the “concave” error effectively.