Helically fluted tool
AssigneeDico, Inc.
InventorPhillip A. Diskin
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool has a plurality of helical channels located in the body of the rotary cutting tool. Individual cutter segments are bonded within each helical channel to form a continuous helical cutting edge that is machined to a finished state. An area of the tool body adjacent to the helical channel is removed to create helical flutes. Preferably, the segments are cut from disks of polycrystalline diamond (PCD) or polycrystalline cubic boron nitride (PCBN).
Claims17
A method of manufacturing a rotary cutting tool comprising the steps of:
- (a) providing a tool body;
- (b) forming at least one helical channel in said tool body;
- (c) affixing a plurality of cutter segments into said helical channel;
- (d) blending the cutter segments together to form a smooth and continuous cutting edge.
A method of manufacturing a rotating cutting tool, said method comprising the steps of:
- (a) providing an elongated, one piece metallic body having a longitudinal major axis;
- (b) forming a plurality of helical channels in the body extending from one end of the body towards middle portions of the body;
- (c) providing a disk of cutting material, said disk having a cutting material of polycrystalline cubic boron nitride (PCBN) or polycrystalline diamond (PCD), and a supporting layer of tungsten carbide;
- (d) cutting the disk into a series of segments;
- (e) placing a plurality of the segments in the channels so that the cutting material of PCD or PCBN material faces a common wall of the channel;
- (f) using pieces of a brazing material to wedge the segments in the channels;
- (g) heating the brazing material to bond the segments in the channels;
- and
- (h) grinding outer portions of the segments to form an essentially continuous cutting edge.
A rotary cutting tool, said cutting tool comprising:
- (a) an elongated metallic body having a longitudinal major axis;
- (b) at least one helical channel in said body;
- (c) a smooth and continuous cutting edge in the channel formed from a plurality of cutter segments affixed to the channel and blended together.
Dependencies are inferred from the claim text.