| 摘要 |
PROBLEM TO BE SOLVED: To provide a grinding wheel, which improves the finishing accuracy of grinding of a work surface, keeps the rotation of the grinding wheel smooth even if a liquid soaks into a core part of the wheel, and prevents vibration caused by the swing of the wheel. SOLUTION: A disc-shaped grindstone unit 12-N has a core part made of a normal abrasive grain vitrified grindstone with a through hole penetrating through in the axial direction formed at the center, and an outer circumference part made of a superabrasive grain vitrified grindstone formed consecutively on the outside of the core part and extended in the circumferential direction to form a circular shape. A plurality of the grindstone units 12-N are laminated in the axial direction to be coaxial with each other to form a grindstone laminated body 10. The laminated structure of the grindstone laminated body 10 is maintained with a shaft 30 inserted through a through-opening formed by the collected core part through holes, and with holding members 32, 32' fitted on the shaft to hold the laminated body 10 between them. COPYRIGHT: (C)2004,JPO
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