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US 6,149,355 AGranted
Ball nose end mill and a cutting insert for the ball nose end mill
AssigneeSafety S.A.
InventorsRichard Fouquer, Patrick Andre
Life of this patent
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AssigneeSafety S.A.
InventorsRichard Fouquer, Patrick Andre
Estimating the term…
A ball nose end mill includes two identical cutting inserts which are clamped into two dissimilar insert seats. Each one of the two insert seats includes a narrower end and a wider end, the narrower end of one insert seat being located at the tip of the end mill, while the narrower end of the other insert seat is located at the end of the insert seat distal to the tip of the end mill. The inserts are correspondingly shaped with a wider end a narrower end, the ends being curved, and with rectilinear longitudinal sides. The inserts may be inclined axially negatively. The ball nose end mill permits two identical inserts to be used, permits large cutting depths to be obtained, and a negative axial inclination permits an impact point that is distanced from the tool tip.
A cutting insert for ball nose end mills, the cutting insert comprising a first and a second curved cutting edge and a first and a second substantially rectilinear cutting edge, wherein the first curved cutting edge is shorter than the second curved cutting edge and the first substantially rectilinear cutting edge is shorter than the second substantially rectilinear cutting edge, and wherein, when viewed from along a central axis of the insert, the insert includes first and second non-identical halves, the first half including the first curved cutting edge and the first substantially rectilinear cutting edge and the second half including the second curved cutting edge and the second substantially rectilinear cutting edge.
Dependencies are inferred from the claim text.