Spade drill insert and spade drill with chip control geometry.

摘要

A drill insert blade (40) selectively attachable to a support (21), the drill insert blade (40) comprising: a body generally shaped plate including a front portion (40 a) with a perímetrogeneralmente shaped of V, a portion securable retaining the support, and a central axis (26) and having upper unasuperficie (80), a first cutting edge (49) defined by said forward portion, said first cutting edge extendiéndosedesde said central axis a first edge of said body, anda second cutting edge defined by said forward portion (40 a), said second edge corteextendiéndose from said central axis (26) to a second edge of said body, said second edge corteposicionado 180 ° said first cutting edge about the central axis, wherein said first edge and said second Decorte cutting edge define legs of said perimeter generally V-shaped, wherein said insert further comprises a d isposición control chip for album counts of short and narrow chips, said control arrangement chip comprising a primeraranura concave chip (44) defined by a surface of said adjacent said first Decorte edge body, said first chip groove having a surface attack (75) sloping downward desdedicho first cutting edge (49) and a surface of chip breaking (76) sloping upward to upper lasuperficie (80) of the insert, said first chip groove extending parallel to said edge Decorte and including a plurality of spaced elongated projections divider and breakers chips (45), said divider and breaker projections chip (45) through said chip groove (44) extending perpendicularly to said cutting edge between said rake surface (75) and said surface of deviruta break (76) and at least one of said divider and projections chip breaker (45) if endo generalmentede oval shape.