Patent ID: 9669511
Date: 2017-06-06
CPC Classifications: B24B

Claim:
1. A surface grinding method for a workpiece that grinds an upper surface of the workpiece by a cup grinding wheel being rotated to pass a center part of the workpiece while supplying a slurry containing abrasive grains to the upper surface of the workpiece being rotated and a circumference of the center part of the workpiece, characterized by rotating the grinding wheel at a peripheral speed of no more than 500 m/min, dripping the slurry intermittently at or at less than 4.0 ml/cm blowing air, injected from a spray nozzle, from a side substantially opposite side to the grinding wheel toward a center side of the workpiece in the direction of the center part of the workpiece, blowing air injected from the spray nozzle to the slurry while being dropped from the dropping pipe and before being dropped on the upper surface of the workpiece, and supplying the slurry to a ground portion of the workpiece while blowing off the slurry in a mist form by the air.