Cutting insert for high-speed milling cutter

Abstract

An indexable cutting insert (10) having a top surface (12) including a substantially planar central portion (48), a substantially planar bottom surface (14), and a plurality of side surfaces (16, 18, 20, 22). A long cutting edge (24, 26), a corner radius cutting edge (28, 30), a facet radius cutting edge (32, 34), and ramping cutting edge (36, 38) are defined at an intersection between the top surface (12) and one of the side surfaces (16, 18, 20, 22). A margin (87, 89) extends around a nose radius of the cutting insert (10) and blends into a flat surface (94, 96). A margin angle, C, formed by the margins (87, 89) is less than a seating angle, B, formed by the flat surfaces (94, 96). The top surface (12) includes a plurality of upward sloping radius blends (50, 52, 54, 56, 58, 60, 62, 64) extending between the substantially planar central portion (48) and a plurality of upward sloping rake faces (70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92) extending between a respective radius blend and its respective cutting edge such that the rake face forms an angle, A, of between five and twenty-five degrees with respect to the central portion (48) of the top surface (12).

Dependencies are inferred from the claim text.