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US 10,328,536 B2Granted
Rotary cutting tool having PCD cutting tip
AssigneeKennametal Inc.
InventorsKarthik Sampath, Armin Zimmerman, Steve George
Life of this patent
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Abstract
A rotary cutting tool with an elongate body disposed about a longitudinal axis, the elongate body including a helical flute and a polycrystalline-diamond cutting tip. The cutting tip comprises an inner portion having an inner point angle and an outer portion having an outer point angle different from the inner point angle.
Claims20
A method for forming a rotary cutting tool having a polycrystalline-diamond cutting tip, the method comprising:
- forming at least two generally axially and helically extending coolant passages in a generally cylindrical tool body, each of the coolant passages being positioned circumferentially 25 to 60 degrees from a cutting corner edge of a helical flute of the rotary cutting tool;
- forming at least two straight coolant passages in a tip portion, the tip portion being separate from the tool body;
- the tip portion including a first set of at least two openings disposed at a coupling end of the tip portion and a second set of at least two openings disposed at a free end of the tip portion, wherein the straight coolant passages extend between the first set of openings and the second set of openings;
- and
- thereafter coupling the tip portion to the tool body at a coupling area, with the respective coolant passages in the tool body and tip portion aligned, thereby to form the rotary cutting tool with at least two generally axial and helical coolant passages therethrough.
2 more elements
A method for forming a rotary cutting tool having a cutting tip, the method comprising:
- forming at least two generally axially and helically extending coolant passages in a generally cylindrical tool body, each of the coolant passages being positioned circumferentially 25 to 60 degrees from a cutting corner edge of a helical flute of the rotary cutting tool;
- forming at least two straight coolant passages in a tip portion formed from a first material, the tip portion being separate from the tool body;
- the tip portion including a first set of at least two openings disposed at a coupling end of the tip portion and a second set of at least two openings disposed at a free end of the tip portion, wherein the straight coolant passages extend between the first set of openings and the second set of openings;
- and
- thereafter coupling the tip portion to the tool body at a coupling area, with the respective coolant passages in the tool body and tip portion aligned, thereby to form the rotary cutting tool with at least two generally axial and helical coolant passages therethrough.
2 more elements
Dependencies are inferred from the claim text.