Drill bit or end mill with grooved flutes
AssigneeMCA Micro Crystal AG
InventorAndreas Maier
Life of this patent
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Abstract
A cutting tool in the form of a drill bit or end-milling tool has an elongated body formed with at least one cutting edge defined by a flank of a flute running primarily along a rotation axis of the body and having leading and trailing flanks one of which is formed with wavelike and spaced projections and recesses. The depth of these grooves and, hence, the height of the projections increases toward the end cutting edge to break up chips.
Claims18
A cutting tool in the form of a drill bit or end-milling tool comprising an elongated body formed with at least one cutting edge defined by a flank of a flute running helically relative to a rotation axis of the body and having leading and trailing flanks one of which is formed generally along its full length with wavelike, helical, and spaced ribs and a plurality of guide grooves, the depths of the grooves and heights of the ribs increasing toward the cutting edge.
A cutting tool in the form of a drill bit or end-milling tool comprising an elongated body formed with at least one cutting edge defined by a flank of a flute running primarily along a rotation axis of the body and having leading and trailing flanks one of which is formed with wavelike and spaced ribs and guide grooves, the depth of the grooves and height of the ribs increasing toward the cutting edge, the grooves being of trapezoidal shape seen axially.
Dependencies are inferred from the claim text.