Drill, and drilling method

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 51/04 (2006.01) B23B 41/02 (2006.01) B23B 49/02 (2006.01) B23Q 1/34 (2006.01) B23Q 11/10 (2006.01) B23Q 17/22 (2006.01)

Patent

CA 2577127

The invention relates to a drill (4) and a device or a method for drilling boreholes in work-pieces (3), in which a periodically acting radial force (19) is exerted on the drill head (5) of the drill (4). The drill head (5) of the drill (4) has a cutting edge (52) extending only over a part of the diameter D(51) and is designed to have a lateral, V-shaped chip removing groove or bead (59) and with a channel (12) with an outlet opening (56) in the drill head (5) for supplying a drill fluid (9). On a drill side (61) of the drill head (5) opposite the bead (59) between a first and a second cylinder casing partial surface (64, 65) of the drill head (5) a rear offset (63) is formed which reduces the cross section of the drill head (5) in relation to an enclosing cylinder casing surface (61) of the drill head (5).

L'invention concerne un foret (4) et un dispositif, ou un procédé, destiné au perçage de trous dans des pièces (3), dispositif dans lequel une force radiale (19) s'exerce périodiquement sur la tête d'alésage (5) du foret (4). La tête d'alésage (5) du foret (4) présente un tranchant (52) ne s'étendant que sur une partie du diamètre D (51), et est formée d'une rainure ou d'une moulure latérale, en forme de <= V >=, d'évacuation des copeaux (59) et d'un canal (12) comportant un orifice de sortie (56) dans la tête d'alésage (5) pour l'amenée d'un fluide de perçage (9). Sur une partie (61) de la tête d'alésage (5) opposée à la moulure (59), il est formé, entre une première et une seconde surface latérale partielle (64, 65) de la tête d'alésage (5), un renversement (63) réduisant la section de la tête d'alésage (5), par rapport à une surface latérale enveloppante (62) de ladite tête d'alésage (5).

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