Rotary cutting tool with helically running cutting edges and method of manufacturing such a tool
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United States of America Patent
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Issued Date -
May 21, 2015
app pub date -
Oct 7, 2014
filing date -
Oct 7, 2013
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Abandoned
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Abstract
The invention relates to a rotary cutting tool (10), in particular a milling tool, boring tool or a reamer, with a metallic base tool body (12) with at least one preferably helical flute (16, 18), preferably with a pair of flutes, wherein a cutting element (24, 26) of an ultra-hard cutting material such as polycrystalline diamond (PKD) or polycrystalline, cubic boron nitride (PCBN) for forming a helically running cutting edge (28) is associated with the at least one flute and is connected such as soldered to the base tool body (12; 42; 70; 94). In order to increase the service life and simplify the manufacture, it is provided that the cutting element (24, 26) is constructed as a one-part diamond body (24, 26) or from several diamond segments in the form of a section of a solid body that is/are received in a receptacle (20, 22) constructed along the flute (16, 18), wherein the helically curved cutting edge is constructed in the diamond body or the diamond segments in a material-removing manner.
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