Patent ID: 6796751
Filing Date: 2004-09-28
Classification: B23B,B23C,Y10T

Abstract:
A ball nose end mill insert for removable affixation to a tool body having a centerline of rotation, the insert comprising:an insert body having a contact surface for mating engagement with a mounting surface of the tool body; the insert body including a curved cuffing face surface following a curved path within a plane substantially parallel to the centerline of rotation and extending between an axially leading tip cuffing face surface and an axially trailing side cutting face surface substantially spaced from the centerline of rotation, the insert body including a curved land surface extending between a tip land surface and a side land surface substantially perpendicular to the tip land surface; a plurality of face serrations formed along the curved cutting face surface, the face serrations having face crests each raised from the contact surface a distance greater than a spacing between an adjacent face root and the contact surface, each face crest having a face crest centerline and each face root having a face root centerline, an intersection of the curved land surface and the plurality of face serrations along the curved cutting face surface forming a serrated curved cutting edge; and each face crest at the curved cutting edge being spaced farther from the centerline of rotation than the adjacent face root, such that the face crest engages a workpiece to minimize engagement of the face roots with the workpiece.