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US 9,895,757 B2Granted
Reamer
AssigneeKennametal Inc.
InventorsMichael Hacker, Sebastian Kunschir, Armin Zimmermann, Xaver Spichtinger, Wolfgang Lang, Michaela Götz, Heinrich Manner
Life of this patent
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Abstract
A reamer has a basic tool body made of hard metal (12) and a plate-like cutting insert (18) inserted into a recess (28) at the front. The cutting insert (18) is at least partially made of polycrystalline diamond, its cutting edges (20) situated axially offset relative to the cutting edges (30) on the basic tool body (12), thus engaging with the workpiece later.
Claims12
A reamer defining a longitudinal axis and comprising:
- a basic tool body at least partially made of hard metal, the basic tool body having a clamping end and a front end opposite the clamping end that penetrates into the workpiece, the front end having a front side and hard metal cutting edges that protrude axially around a circumference of the front end, the front side having an axial recess into which a cutting insert at least partially made of polycrystalline diamond is inserted;
- wherein the cutting insert hag has two opposing flat surfaces and a plurality of radially protruding diamond cutting edges;
- wherein the hard metal cutting edges are arranged such that, in a cutting feed direction, cutting first starting from hard metal cutting edges at the front end, followed by the diamond cutting edges;
- and
- wherein the hard metal cutting edges have a smaller cutting diameter than the diamond cutting edges.
2 more elements
Dependencies are inferred from the claim text.