GRINDING METHOD AND GRINDING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a grinding method that processes the surface of a workpiece which has been once smoothly finished to coarse roughness while the geometry of the workpiece is maintained at high accuracy, and exhibits preferable manufacturing efficiency, and to provide a grinding device.SOLUTION: A grinding step S2 of grinding a conic surface WFa of a flange WF of a workpiece W with a single grinding wheel 5 includes: a rough cut-in step S21 and a finish cut-in step S22; a spark-out step S23 after the finish cut-in step S22; and a roughening cut-in step S24 after the spark-out step S23.