Cutters – for shaping – Rotary cutting tool – Face or end mill
Patent
1997-10-01
1999-06-29
Pitts, Andrea L.
Cutters, for shaping
Rotary cutting tool
Face or end mill
407 62, 407 65, 407113, 407114, B23C 520
Patent
active
059158883
ABSTRACT:
The present invention relates to a rotary cutting tool assembly comprising a combination of a single ball nose cutting insert of a generally elongated configuration. The ball nose cutting insert is fixed into a holding body provided with a slot adapted to securely and non-movably hold the insert. The single ball nose cutting insert has at least one fill ball nose cutting end having a cutting edge of a continuous spiral fluted configuration. The fill ball nose cutting end comprises a cutting face consisting of two radius cutting edges meeting at a center or tip of the full ball nose cutting end forming a web. The cutting face forms a true helical path made of a continuous curve following a spiral shape, and helix angles of the radius cutting edges are between 3 to 45 degrees with respect to a longitudinal axis of the ball nose cutting insert in both right and left directions. The ball nose cutting insert has a solid configuration and comprises two identical reversible fill ball nose cutting ends formed on opposite ends of the insert. The radius cutting edges of the cutting faces are arranged to form a spiral or helical configuration, and the cutting faces of the single ball nose cutting insert are formed a grinding wheel.
REFERENCES:
patent: 3409965 (1968-11-01), Fisher
patent: 4251172 (1981-02-01), Durand
patent: 4423989 (1984-01-01), Kress et al.
patent: 5064316 (1991-11-01), Stojanovski
patent: 5193943 (1993-03-01), Kim
patent: 5632576 (1997-05-01), Storch
patent: 5685671 (1997-11-01), Packer et al.
Pitts Andrea L.
Shvartsman Mila
Tsai Henry W. H.
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