| 摘要 |
An indexable cutting insert includes a first component with an outer or top surface and side surfaces. A third component is mirror symmetric with respect to the first component about a vertical or y-axis of the cutting insert. A second component is disposed between the first and third components. Multiple cutting edges are defined at an intersection between the side surfaces and the top surface, wherein the cutting edges define a positive axial rake angle. In one embodiment, the first and third components are in the shape of a polygonal with a star appearance, and the second component is in the shape of a square. The first and third components are offset from one another by a first offset angle, while the second component is offset from the first and third components by a second offset angle to allow the cutting insert to be indexable.
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