To equalize abrasion loss in the radial direction, prolong the life of a grinding wheel, and maintain grinding accuracy for a long term, by arranging a plurality of sorts of abrasive grain segment tips continuously changing grinding wheel performance in the radial direction of the grinding wheel.
A first abrasive grain segment tip 12 is formed into a nearly fan-like plate shape, a second abrasive grain segment tip 13 is formed into a plate shape, and they are combined together so as to form an annular grinding wheel. Diamond, CBN, and the like are used for super abrasive grains. A plurality of the first abrasive grain segment tips 12 and the second abrasive grain segment tips 13 are fixed to the upper end face of a grinding wheel base 11 through adhesive. A fitting hole 11c is mounted on the extreme end of a shaft, and a nut is engaged with the external thread on the extreme end of the shaft. By rotating the shaft, a grinding wheel 10 is rotated in the direction of the arrow mark 14. Hereby, abrasion loss in the radial direction of the grinding wheel 10 becomes uniform.
NAKANO AKIRA
TAKAHASHI KUNIO
TOYODA VAN MOPPES LTD
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