Rotary cutting tool with effective chip evacuation
AssigneeKennametal Inc.
InventorsMark Alan Francis, Michael David Saffels
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool, such as a milling cutter (10) includes a central hub (12), a cutting rim (14) and a plurality of spokes (22) connecting the central hub (12) to the cutting rim (14). Each spoke (22) is separated by an opening (32) and polygonal in cross-sectional shape formed by two side walls (22a, 22b), two front walls (22c, 22d) and a rear wall (22e). One of the side walls (22a) of each spoke (22) is formed at a pitch angle (42) with respect to a central axis (11) of the cutting tool (10) that is sufficient to cause lift of chips through the opening (32), thereby providing effective chip evacuation during a material removal operation.
Claims16
A rotary cutting tool for removing material from a workpiece, comprising:
- a body having a central hub and a cutting rim;
- and
- a plurality of spokes extending outward in a radial direction from the central hub to the cutting rim, each spoke separated by an opening,
- wherein each spoke is polygonal in cross-sectional shape formed by two side walls, two front walls and a rear wall, and
- wherein one of the side walls is formed at a pitch angle in a range between about thirty-five degrees to about fifty-five degrees with respect to a central axis of the cutting tool that creates a sufficient vacuum such that chips produced during a material removal operation are lifted through the opening, thereby providing effective chip evacuation during the material removal operation.
A rotary cutting tool for removing material from a workpiece, comprising:
- a body having a central hub, a cutting rim, and a plurality of spokes connecting the central hub to the cutting rim, each spoke separated by an opening and polygonal in cross-sectional shape formed by two side walls, two front walls and a rear wall,
- wherein one of the side walls of each spoke is formed at a pitch angle in a range between about thirty-five degrees to about fifty-five degrees with respect to a central axis of the cutting tool that is sufficient to create a vacuum such that chips are lifted through the opening, thereby providing effective chip evacuation during a material removal operation.
Dependencies are inferred from the claim text.