A METAL CUTTING INSERT FOR A DRILL TOOL, AND A DRILL TOOL
A metal cutting drill insert 100,400 for a drill tool comprising: opposing top surface 101,401 and bottom surface 102,402 with a symmetry axis of the cutting drill insert extending there between, and a peripheral side surface 103,403 extends between said top surface and said bottom surface, wherein...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | A metal cutting drill insert 100,400 for a drill tool comprising: opposing top surface 101,401 and bottom surface 102,402 with a symmetry axis of the cutting drill insert extending there between, and a peripheral side surface 103,403 extends between said top surface and said bottom surface, wherein the top surface 101,401 comprises a rake face 104,404 and the side surface 103,403 comprises a clearance face 105,405. The metal cutting drill insert further comprises at least one stepped cutting edge 106,406 configured to cut a continuous chip along said at least one stepped cutting edge, wherein said at least one stepped cutting edge is formed at an intersection of a rake face 104,404 of the top surface 101,401 and an adjoining clearance face 105,405 of the side surface 103,403, wherein in a top view facing the top surface of the metal cutting insert, said at least one stepped cutting edge comprises a step formed by a transitional edge 107,507 between a first part edge 108,508 and a second part edge 109,509; characterized in that in a top view facing the top surface 101,401 of the metal cutting insert 100,400, said step extends in a radial direction relative the symmetry axis, a first distance h1; and in a side view facing the peripheral side surface 103,503 of the metal cutting insert 100,400, said step extends in a direction from the bottom surface towards the top surface, a second distance h2, wherein 0.8·h1 ≤ h2 ≤ 1.2·h1. |
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