Method for grinding spherical surface of workpiece

The invention discloses a method for grinding the spherical surface of a workpiece. According to the method, the workpiece is coaxially and fixedly arranged at the clamping end of a clamping rotating shaft, so that the spherical center of the spherical surface to be machined on the workpiece is coincided with the revolving center of a revolving mechanism; during grinding, the clamping rotating shaft is driven by the revolving mechanism to do centering swing around the revolving center of the revolving mechanism, and the clamping rotating shaft is driven by a rotating shaft driving mechanism to drive the workpiece to rotate around the revolving central axis of the clamping rotating shaft; and a grinding wheel rotates around the revolving central axis of the grinding wheel, and a grinding working surface of the grinding wheel contacts the outer peripheral surface of the spherical surface to be machined on the workpiece to grind the workpiece. By the method, grinding errors are reduced effectively, and grinding