Cutting insert for a cutting tool, its use and cutting tool with a cutting insert

摘要

Cutting insert (1) for a cutting tool for machining by starting chips of a workpiece with: an upper surface (2), whose main orientation defines a main plane (H), a lower surface and a side wall peripheral (3) between the upper surface (2) and the lower surface, at least one rounded corner being formed in the peripheral direction that is configured at least on the side of the upper surface (2) as a cutting corner (4), forming an edge in the area of the cutting corner (4) and at least one edge (6) adjacent to the cutting corner (4), which run respectively between the side wall (3) and the upper surface (2), a cutting edge (5), being configured in a radial direction (Q), which runs in the main plane (H) from the cutting corner (4) to the center (Z) of the cutting insert (1), in the following order: an inclined chip surface (8), a guide step base of v irutas (9; 9a) adjacent to the chip surface, a first chip guide step (11), adjacent to the chip guide step base (9; 9a), with a first surface (11a) ascending with respect to the guide step base of shavings (9; 9a) and a first plateau (11b) adjacent thereto, a second guide step of shavings (12) with a second surface (12a) ascending with respect to the first plateau (11b) and with a second plateau (12b) adjacent to it, and a third guide step of shavings (13) with a third surface (13a) ascending with respect to the second plateau (12b) and a third plateau (13b) adjacent to it, characterized in that the second chip guide step (12) is narrower than the first chip guide step (11) in a transverse direction that runs perpendicular to the radial direction (Q) and parallel to the main plane (H).