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US 2010/0061816 A1Published application
Cutting insert
AssigneeKennametal Inc.
InventorsLothar Koerner, Carsten Schwaner, Uwe Hahn
Life of this patent
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AssigneeKennametal Inc.
InventorsLothar Koerner, Carsten Schwaner, Uwe Hahn
Estimating the term…
The invention relates to a cutting insert for chip-forming machining, of which at least the top surface, on one side, forms the face (1) and the peripheral, planar side surface, which are located at right angles to one another, form the flanks (2), wherein, downstream of a planar face portion (3) which is adjacent to the flanks and is arranged at a rake angle of 0°, the face terminates, via downwardly sloping planar wall portions (4), in a lower-level, planar chip-forming base (5) and, in the direction of the centre, it slopes up, via upwardly sloping planar wall portions (6), to a central, planar face plateau (7). In order to ensure specific chip formation over the entire region of the cutting insert, it is proposed that a plurality of raised chip-forming elements (8) are arranged parallel to one another, and at equal spacings, on two mutually opposite, upwardly sloping wall portions (6) of the face plateau (7), and these chip-forming elements have a roof surface (9), which slopes down to the chip-forming base (5), and downwardly sloping flanks (10).
A cutting insert for chip-forming machining, of which at least the top surface, on one side, constitutes the face and the full-perimeter, planar side surfaces, which are located at right angles to one another, constitute the flanks, wherein, after a planar face portion that is adjacent to the flanks and is arranged at a rake angle of 0°, the face tapers, via downwardly sloping planar wall portions, into a lower-level, planar chip-forming base and, in the direction of the center, it slopes up, via upwardly sloping planar wall portions, to a centrally located, planar face plateau wherein a plurality of raised chip-forming elements are arranged parallel to one another, and at equal spacings, on two mutually opposite, upwardly sloping wall portions of the face plateau, which chip-forming elements have a top surface, which slopes downward to the chip-forming base, and downwardly sloping flanks.
The cutting insert as claimed in claim wherein the top surfaces of the chip-forming elements constitute ramps that have a lesser inclination than 15°, or in partial regions the same inclination as, the downwardly sloping planar wall portions of the face plateau that are inclined at an angle of 20° to 40° relative to the chip-forming base.
Dependencies are inferred from the claim text.