Ball end mill
OwnerRyosuke Hosoiinventor
Life of this patent
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Abstract
A single-toothed ball end mill provided with a cutting edge including a starting end, positioned near the center of rotation of the end mill and having an upright portion. The cutting edge is defined by a line curved outwardly in the direction of rotation of the end mill when viewed from the bottom. The cutting edge has its greatest curvature at the center portion of the end mill so as to permit the cutting edge to initiate a cutting operation with its starting end and to thereafter perform the cutting operation progressively in a radially outwardly direction.
Claims9
A toothed ball end mill comprising a shank having a ball end, a tooth projecting axially of said shank having a cutting edge formed thereon, said cutting edge including a starting end located adjacent the longitudinal axis of said shank and extending along a line which curves radially outwardly in the direction of rotation of the end mill and having its greatest curvature proximate the central portion of the end mill, said curved line of the cutting edge progressively increasing in curvature from an outer peripheral portion of the end mill toward the center portion thereof.
Dependencies are inferred from the claim text.