Cutting insert

B - Operations – Transporting – 23 – C

Patent

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Details

B23C 5/20 (2006.01) B23B 27/22 (2006.01)

Patent

CA 2262655

A chip cutting insert has an upper chip surface (2), a lower base surface (4), at least three side surfaces (6, 8) and at least two cutting edges (10) formed at the intersection of the upper surface (2) with two insert side surfaces (6). Each cutting edge (10) has leading and trailing ends (30, 32). The side surface (6) associated with each cutting edge (10) comprises an upper primary relief section (20) inclined to the insert base surface (4) at a first interior angle .alpha.1, and a lower secondary relief section (22) inclined to the insert base surface (4) at a second interior angle .alpha.2, the second interior angle .alpha.2 being acute and being different from the first interior angle .alpha.1 at least along a part of cutting edge (10).

L'invention concerne une plaquette d'enlèvement de copeaux comprenant une surface supérieure d'enlèvement de copeaux (2), une surface de base inférieure (4), au moins trois surfaces latérales (6,8) et au moins deux bords de coupe (10) formés au niveau de l'intersection entre la surface supérieure (2) et deux surfaces latérales (6) de la plaquette. Chaque bord de coupe (10) présente des extrémités d'attaque et de fuite (30, 32). La surface latérale (6) associée à chaque bord de coupe (10) comprend une section de dépouille supérieure (20) inclinée par rapport à la surface de base (4) de la plaquette selon un premier angle intérieur alpha 1, et une section de dépouille secondaire inférieure (22) inclinée par rapport à la surface de base (4) de la plaquette selon un second angle intérieur alpha 2, lequel est aigu et différent du premier angle alpha 1 au moins le long d'une partie de l'angle de coupe (10).

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