Drill insert geometry having v-notched web

Details Drill insert geometry having v-notched web Drill insert geometry having v-notched web

B - Operations, Transporting

23

B

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

Patent

CA 2441511

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 porte sur une bande à encoche en V (66) formée sur un insert (35) d'un ensemble foret (10). La bande à encoche en V (66) permet d'améliorer la stabilité et les vitesses d'avancement, et de réduire la chaleur générée à l'extrémité de l'insert. L'invention porte également sur un insert de forage comprenant un corps pourvu au moins de deux bords coupants, une bande ménagée entre les deux bords coupants et une encoche amincissant la bande formée de chaque côté de la bande. Chaque encoche forme un bord coupant présentant un angle de pente positif.

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