Ceramic drill for high-speed drilling

Details Ceramic drill for high-speed drilling Ceramic drill for high-speed drilling

B - Operations, Transporting

23

B

B23B 51/00 (2006.01) B23B 51/02 (2006.01)

Patent

CA 2481804

This ceramic drill bit is composed of a cylindrical shank (2), a shaped part (3) extending in the shaft direction by forming a straight line with this shank and having the free end (10) for forming a tip (2) of the bit, a flange (21) extending from a main cutting edge (18) having a relief angle between 4° and 10° with respect to a plane perpendicular to the drill bit (1) rotation axis (4), and two notches (27) forming two secondary cutting faces (28) extending from the central edge (19) with positive cutting angles (29) lying in the range of about 1° to 7° to the rotary shaft of the bit.

Foret céramique comportant une queue cylindrique (2) et une partie taillée (3) s'étendant axialement dans le prolongement de la queue (2) et dont l'extrémité libre (10) forme la tête du foret, une face de dépouille (21) qui s'étend depuis chaque arête de coupe principale (18) avec un angle de dépouille compris entre 4 et 10 degrés environ par rapport à un plan perpendiculaire à l'axe de rotation (4) du foret (1), et deux piqûres (27) formant deux faces de coupe secondaires (28) s'étendant depuis l'arête centrale (19) avec un angle de coupe positif (29) compris entre 1 et 7 degrés environ par rapport à l'axe de rotation (4) du foret (1).

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