Method and apparatus for grinding workpiece surfaces to super-finish surfaces with micro oil pockets

摘要

A grinding machine rotatably carrying a finish grinding wheel (34) and a super-finish grinding wheel (35) respectively on first and second wheel heads (27,28) practices a method of grinding workpiece surfaces to super-finish surfaces with micro oil pockets. A surface of a workpiece rotatably carried on the machine is first ground with the finish grinding wheel to a predetermined diameter under the control of a sizing device (49,50). The workpiece surface is then ground with the super-finish grinding wheel to a target diameter under the control of a sizing device. The super-finish grinding is performed to the extent that peaks of a section curve representing the roughness of the workpiece surface attained by the finish grinding are removed but bottoms of the surface curve are left to a depth when the target diameter is reached, so that the bottoms so left of the roughness constitute the micro oil pockets. <IMAGE>