Cutting insert and cutting tool for chip removing machining

A milling cutter comprising a cutter body and a plurality of inserts mounted therein, each of said inserts comprising a body having a polygonal upper chip face, a substantially planar bottom face, and side surfaces intersecting one another to form corners of said insert and intersecting said chip face and said bottom face, cutting edges being formed by the intersection of said chip face with respective side surfaces, a lower portion of each side surface extending upwardly and outwardly from said bottom face, an upper portion of each side surface being beveled to form a planar clearance face which intersects a respective cutting edge, each clearance face being disposed between two adjacent corners and having a width extending in a direction transversely of said cutting edge, said width being largest adjacent one of said two corners and decreasing toward the other of said two corners, said inserts oriented to form a positive axial rake angle and a negative radial rake angle.

A cutting insert for chip removing machining of metal workpieces, comprising a body having a polygonal upper chip face, a substantially planar bottom face, and side surfaces intersecting one another to form corners of said insert and intersecting said chip face and said bottom face, cutting edges being formed by the intersection of said chip face with respective side surfaces, a lower portion of each side surface extending upwardly and outwardly from said bottom face, an upper portion of each side surface being beveled to form a planar clearance face which intersects a respective cutting edge, each clearance face being disposed between two adjacent corners and having a width extending in a direction transversely of said cutting edge, said width being largest adjacent one of said two corners and decreasing toward the other of said two corners, said insert including a strengthening land extending inwardly form said cutting edge, a central portion of said chip face being recessed toward said bottom face, said chip face including descending walls extending downwardly from said lands to said recessed central portion, said descending walls being separated from one another by raised ribs, said ribs being situated adjacent respective corners and including upper surfaces lying in a common plane oriented parallel to said bottom face.

A cutting insert for chip removing machining of metal workpieces, comprising a body having a polygonal upper chip face, a substantially planar bottom face, and side surfaces intersecting one another to form corners of said insert and intersecting said chip face and said bottom face, cutting edges being formed by the intersection of said chip face with respective side surfaces, a lower portion of each side surface extending upwardly and outwardly from said bottom face, an upper portion of each side surface being beveled to form a planar clearance face which intersects a respective cutting edge, each clearance face being disposed between two adjacent corners and having a width extending in a direction transversely of said cutting edge, said width being largest adjacent one of said two corners and decreasing toward the other of said two corners, said bottom face being polygonal and being angularly displaced relative to said polygonal chip face as said insert is viewed in plan.

A cutting insert for chip removing machining of metal workpieces, comprising a body having a polygonal upper chip face, a substantially planar bottom face, and side surfaces intersecting gone another to form corners of said insert and intersecting said chip face and said bottom face, cutting edges being formed by the intersection of said chip face with respective side surfaces, a lower portion of each side surface extending upwardly and outwardly from said bottom face, an upper portion of each side surface being beveled to form a planar clearance face which intersects a respective cutting edge, each clearance face being disposed between two adjacent corners and having a width extending in a direction transversely of said cutting edge, said width being largest adjacent one of said two corners and decreasing toward the other of said two corners, said cutting edges including main edge portions, corner edge portions, and secondary edge portions, each secondary edge portion interconnecting a main edge portion with a corner edge portion, said main edge portion being inclined inwardly relative to a respective secondary edge portion by a slight angle as said chip face is viewed in plan.