Abstract:One method of CNC grinding disk wheel dresser and error impact analysis were proposed in order to improve the accuracy of face gear grinding.The motions of grinding face gear by disk wheel were analyzed based on the principle of face gear drive.The diamond wheel was selected for dressing according to the characteristics of the wheel tooth profile,and the trajectory curve of the diamond wheel was calculated and the method of CNC cutter sites and step size selection were proposed.The error type of the grinding wheel profile was analyzed,and the face gear tooth surface equation with error was given.The discrete points on the face gear tooth surface were fitted with MATLAB and CATIA software,and the impacts variation of wheel error on the face gear type surface was obtained.Finally,the experiment of dressing wheel and grinding face gear test were carried out, and the coordinate values of tooth surface points were detected with the maximum deviation of -10.1~12 μm.The results verified the proposed method.