Metal drilling tool and method

B - Operations – Transporting – 23 – B

Patent

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B23B 27/00 (2006.01) B23B 51/04 (2006.01)

Patent

CA 2200411

A drilling tool having a cylindrical body with a central axis. A first cutting insert with a cutting edge extending from a datum plane from a position about half way between the central axis and the outer edge of the holes and extending toward the first end of the tool at a first acute angle and a second cutting insert extending from the datum plane extending generally outwardly at a second acute angle substantially less than the first acute angle so that the cutting path of the second insert intersects the cutting path of the first insert whereby four chips are cut by the cutting tool.

Outil à percer possédant un corps cylindrique muni d'axe central. Une première plaquette de coupe dont l'arête tranchante s'étend d'un plan de référence à partir d'un emplacement situé environ à mi-chemin entre l'axe central et le bord extérieur des trous et se prolonge vers la première extrémité de l'outil selon un premier angle aigu et une deuxième plaquette de coupe qui s'étend du plan de référence qui va généralement vers l'extérieur selon un deuxième angle aigu sensiblement inférieur au premier angle aigu de sorte que la trajectoire de coupe de la deuxième plaquette croise celle de la première plaquette, ce qui permet à l'outil de coupe d'enlever quatre copeaux.

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