Patent ID: 6419561
Filing Date: 2002-07-16
Classification: B23B,B24B

Abstract:
A grinding wheel for producing a helical cutting tool with a longitudinal axis, wherein the cutting tool shaft has a forward end and, when viewed in cross-section perpendicular to the longitudinal axis and spaced from the forward end, is comprised of a flute having a radial depth and a land adjacent to the flute about the longitudinal axis of the shaft along a helix angle, wherein the flute has a lip extending inwardly from an outer radius and a nose adjacent to the lip and wherein each land has a first margin adjacent to the nose, a clearance portion adjacent to the first margin and a second margin adjacent to the clearance portion, wherein the grinding wheel is comprised of:a disk having a disk centerline and an average radial size, a first side and a second side defining a width therebetween and a disk outer edge between the sides, wherein the outer edge has an abrasive material for grinding a cutting tool and wherein the edge has a profile defined by: a) a lip shaper segment extending in a lateral direction from the first side and extending away from the disk centerline a radial distance defining the radial depth of the flute; b) a nose shaper segment adjacent to the lip shaper segment and extending in a lateral direction toward the second side and extending inwardly toward the disk centerline; c) a first margin relief shaper segment adjacent to the nose shaper segment and extending in a lateral direction toward the second side and extending away from the disk centerline; d) a clearance shaper segment extending from the first margin relief shaper segment toward the second side; and e) a second margin relief shaper segment adjacent to the clearance shaper segment and extending in a lateral direction toward the second side and extending toward the disk centerline.