Method of manufacturing grinding wheel
A method of manufacturing a grinding wheel includes a surface unevenness forming step of applying ultrasonic vibrations from an ultrasonic vibration applying unit through water to an annular slot defined in a surface of an annular base along circumferential directions thereof, thereby forming surface unevennesses on either one or both of a side surface and a bottom surface of the annular slot, and, after the surface unevenness forming step, a grindstone fixing step of fixing a plurality of grindstones to the annular slot with an adhesive.
1 . A grinding wheel comprising:
an annular base having an annular slot defined in a surface thereof along circumferential directions thereof; and
a plurality of grindstones fixed to the annular slot by an adhesive, wherein
the annular slot is defined by side surfaces having first surface unevennesses that are periodic in thicknesswise directions perpendicular to the circumferential directions,
the annular slot is defined by a bottom surface having second surface unevennesses that are periodic in radial directions perpendicular to the circumferential directions and the thicknesswise directions, and
wherein at least one of the first surface unevennesses of the side surfaces and the second surface unevennesses of the bottom surface of the annular slot include third surface unevennesses, the third surface unevennesses having a depth smaller than that of the first surface unevennesses and the second surface unevennesses.
2 . The grinding wheel of claim 1 , wherein the third surface unevennesses on the side surfaces of the annular slot include a plurality of holes formed in the side surfaces.
3 . The grinding wheel of claim 2 , wherein the third surface unevennesses on the bottom surface of the annular slot include a plurality of holes formed in the bottom surface.
4 . The grinding wheel of claim 1 , wherein the third surface unevennesses on the bottom surface of the annular slot include a plurality of holes formed in the bottom surface.
5 . The grinding wheel of claim 1 , wherein the annular base includes a plurality of liquid supply ports spaced at substantially equal intervals along the circumferential directions of the annular base.
6 . The grinding wheel of claim 1 , wherein the annular base includes an inner circumferential side surface that is slanted inwardly from the top surface to the bottom surface of the annular base.