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US 10,537,945 B2Granted
End mills having differential twisted gash profiles
AssigneeKennametal Inc.
InventorsSergei Boulakhov, Leonid Sharivker
Life of this patent
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Abstract
In one aspect, elongated rotary cutting tools such as end mills are described herein which may provide one or more advantages over prior designs. For example, in some embodiments, cutting tools described herein can provide reduced wear rates at corner cutting edges, may permit high ramp angles during processing up to and including 45° ramp angles, and/or increased tool life.
Claims22
An elongated rotary cutting tool defining a central longitudinal axis and comprising:
- a shank portion;
- and
- a cutting portion adjoining the shank portion and having a cutting end, the cutting portion having at least a first blade, the first blade having an end cutting edge and a peripheral cutting edge,
- wherein the end cutting edge of the first blade extends from an outer diameter of the cutting portion towards the central longitudinal axis, the end cutting edge of the first blade defining a first dish profile defined by a shape of the first blade when viewed from a side of the rotary cutting tool and a first axial profile defined by a shape of the first blade when viewed from an end of the rotary cutting tool;
- wherein the first dish profile is curved;
- and
- wherein a radially innermost portion of the first dish profile is axially rearward of all other points on the first dish profile.
4 more elements
Dependencies are inferred from the claim text.