Cutters – for shaping – Including tool having plural alternatively usable cutting edges – With integral chip breaker – guide or deflector
Patent
1997-04-28
1998-11-24
Pitts, Andrea L.
Cutters, for shaping
Including tool having plural alternatively usable cutting edges
With integral chip breaker, guide or deflector
407115, 407116, B23B 2722
Patent
active
058398562
ABSTRACT:
A rotary boring tool has a body formed relative to a normal forward cutting direction with a main cutting edge extending transversely of the direction, a pair of side cutting edges extending backward in the direction from ends of the main cutting edge, a substantially planar front face extending substantially perpendicular to the direction from the main cutting edge, and a curved cutting face extending backward in the direction from the main cutting edge between the side edges. This curved face is formed in turn with a respective raised side crest at each side edge spaced backward in the direction from the main cutting edge, a depressed central region between the side crests and extending forward generally to the main cutting edge, a respective side flank between and merging smoothly with each of the crests and the central region and extending generally to the main cutting edge, and a twisted land extending along the main cutting edge between same and the crests, central region and side flanks, and forming with the front face an angle that decreases steadily from each side edge toward a center of the main cutting edge.
REFERENCES:
patent: D306032 (1990-02-01), Mihic
patent: 4583887 (1986-04-01), Wertheimer
patent: 4778311 (1988-10-01), Niemi
patent: 4992008 (1991-02-01), Pano
patent: 5076739 (1991-12-01), Pano
patent: 5156502 (1992-10-01), Satran
Hintze Wolfgang
Ruther Gunther
Dubno Herbert
Pitts Andrea L.
Tsai Henry W. H.
Widia GmbH
Wilford Andrew
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