At last, the concave error of gear profile is quantitatively described by combining bending deformation and contact deformation.

• 最后综合考虑弯曲变形与接触变形，定量描述被剃齿轮齿形的“中凹”误差；对提高剃齿精度，降低齿轮传动噪声有着重要意义。