Abstract: Based on the mechanism analysis of corner contact, the method for the system model of gear error－deformation calculation is established on the line of action. According to the distributive law of key transmission errors, the effective system error is obtained along the line. The synthetic tooth compliance of the point lying in corner contact is inversed based on the theory of engagement and the curve of tooth synthetic compliance & load-history. Combined the effective error for gear system with complex deflection of engaging teeth , the standard of the point situated at corner contact is probed. The key data of the position and impact force from the beginning point of corner contact obtained, and the impact velocity and forces, from the beginning to the end position situated at corner contact, are calculated accurately. Due to the key data, the lash model during corner contact is founded, and the impact friction force and coefficient of engaging points are calculated. Compared with the relative studies, the above model, calculating method and analytical conclusions are reliable. The results could be referenced to study frictional performance of tooth profile and damp and denoise.

Key words: Corner contact, Gear drive, Impact friction, Synthetic compliance, System error