Drill insert geometry having v-notched web

B - Operations – Transporting – 23 – B

Patent

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B23B 27/16 (2006.01) B23B 51/00 (2006.01)

Patent

CA 2678238

The present invention relates to a V-notched web (66) formed on a drill insert (35) of a drill tool assembly (10). The V-notched web (66) allows greater stability and feed rates, while decreasing the heat generated at the insert tip. The present invention is provided by a drill insert comprising a drill insert body having at least two cutting edges, a web between the two cutting edges, and a web thinning notch formed on either side of the web. Each web thinning notch forms a notch edge having a positive rake angle.

La présente invention a pour objet une âme à encoche en V (66) formée sur une pièce rapportée de foret (35) d'un ensemble foret-taraud. L'âme à encoche en V (66) offre une meilleure stabilité et une meilleure vitesse d'avancement, tout en réduisant la chaleur générée à la pointe. La présente invention consiste en une pièce rapportée de foret qui comprend un corps de pièce rapportée de foret doté d'au moins deux arêtes de coupe, d'une âme entre les deux arêtes de coupe et d'une encoche d'amincissement de l'âme, formée de part et d'autre de l'âme. Chaque encoche d'amincissement de l'âme forme une arête d'encoche dotée d'un angle de coupe positif.

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