Abstract: The end grinding of precision thin-ring parts with high accuracy has always been an important research subject in the grinding field.The thin-ring part is characterized by weak rigidity,low thermal capacity,and large amount of heat in grinding,all of which tend to cause deformation easily during grinding.In this paper,an effective solution-flexible clamping is introduced for grinding this kind of part.The flexible clamp is a general cylindrical grinding mandrel.The circular elastic material is put in the groove at the end of the mandrel,which helps to clamp the workpiece and drive its rotation.With such a flexible clamping,the linear grinding of the end surface of thin-walled parts is achieved in the cylindrical grinding machines,reducing the grinding heat and improving the effect of heat dispelling.The diameter thickness of one thin-walled part is about 18 mm,and the thickness is 4±0.01 mm.The conventional grinding time is about 180 min/piece,and the qualification rate is 60 percent;in the case of the flexible clamping,the grinding time is shortened to about 12 min/piece,and the qualification rate is improved to 98 percent.Therefore,it is obvious that the new clamping method can help improve the grinding effect greatly.