| 摘要 |
PURPOSE:To prevent the clogging of a grinding wheel and stabilize polishing performance by providing a liquid feeding means for feeding a polishing liquid to the contacting face of said grinding wheel with a workpiece via the pores of a porous material forming said grinding wheel. CONSTITUTION:During the polishing operation of a workpiece 3, a polishing liquid 4 is always fed to a workpiece polishing face from the pores of a grinding wheel 1 made of a porous material held by a grinding wheel holder 5, through the liquid passage 2a of a shaft 2 provided on the top end of the holder 5. As a result, polishing dust which tends to clog the pores of the grinding wheel a 1 is washed away by this polishing liquid 4, maintaining stable polishing performance while giving desired cutting quality for a long time.
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