Drilling tool

Details Drilling tool Drilling tool

B - Operations, Transporting

23

B

B23B 51/02 (2006.01) B23B 51/06 (2006.01) B23B 51/12 (2006.01)

Patent

CA 2535358

Disclosed is a drilling tool comprising a first drill bit (2) that is provided with at least two forward cutting edges (4, 5) and a second drill bit (3) which encompasses at least two rear cutting edges (6, 7). A cutting groove (8, 9) runs continuously from one respective forward cutting edge (4, 5) to a rear cutting edge (6, 7). Said cutting groove (8, 9) is embodied in an asymmetric manner in an area (A) bordering the forward drill bit (2), in a symmetric manner in a central area (B), and asymmetric in an area (C) bordering the rear drill bit (3).

L'invention concerne un outil de perçage comprenant une première mèche (2) pourvue d'au moins deux arêtes de coupe antérieures (4, 5), ainsi qu'une deuxième mèche (3) dotée d'au moins deux arêtes de coupe postérieures (6, 7). Une rainure à copeaux (8, 9) s'étend de manière continue, respectivement d'une arête de coupe antérieure (4, 5) à une arête de coupe postérieure (6, 7). Ladite rainure à copeaux est configurée de manière asymétrique dans une zone (A) adjacente à la mèche antérieure (2), de manière symétrique dans une zone centrale (B), et de manière asymétrique dans une zone (C) adjacente à la mèche postérieure (3).

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