Cutting tool and two-sided round cutting insert for the same

摘要

A cutting insert (18, 118) for retention in a rotation cutting tool (10) comprising a rotation axis (A), where the cutting insert comprises: two opposite end surfaces (28, 128) and a peripheral lateral surface (26) extending between them, each of the final surfaces has a first mutual axis of symmetry (B) that passes through the final surfaces (28, 128) around which each final surface (28 , 128) has a rotation symmetry that folds N times in which the value of N is chosen from the group of 2, 3 and 4; a peripheral cutting edge (66, 166) formed at the junction between each final surface (28, 128) and the peripheral lateral surface (26), where the peripheral cutting edge comprises N curved cutting edges (32, 34; 132 , 134) that merge with N straight cutting edges (44, 50; 144, 150) that extend between the curved cutting edges (32, 34; 132, 134) at their extremities, in which: the edges of curved cuts (32, 34, 132, 134) of the two end surfaces (28, 128) do not overlap in a final view of the cutting insert (18, 118) along the first axis of symmetry (B); and characterized in that each of the curved cutting edges N (32, 34; 132, 134) is supported by a bull.