Patent ID: 6626167
Filing Date: 2003-09-30
Classification: B24D,B28D

Abstract:
A diamond tool comprising a plurality of segments including diamonds for cutting a brittle substance, sintered metal powder for attaching the diamonds to the segments, and a steel core, wherein:the plurality of segments includes a leading segment and a trailing segment; the diamonds of said each segment have a multi-diamond layered structure wherein the diamond layers are arranged with a gap in a direction perpendicular to a cutting direction; the diamond layers of said each segment are arranged such that grooves are formed on the surface of the brittle substance by diamonds of the leading segment, and additional grooves are subsequently formed by the diamonds of the trailing segment, along lands between the grooves formed by the diamonds of the leading segment; each of the layers has diamond lines having a plurality of diamonds arranged in a line parallel to the cutting direction on a plane parallel to the cutting surface of the segment, with no gap between the diamond lines; and each of the gaps between the diamond layers of the leading segment has a width less than a thickness of each diamond layer of the trailing segment.