Double-sided cutting insert

Details Double-sided cutting insert Double-sided cutting insert

B - Operations, Transporting

23

C

B23C 5/22 (2006.01)

Patent

CA 2554594

A double-sided cutting insert (10), for use in a milling cutter (26), having two identical opposing end surfaces (12) and two opposing identical major side surfaces (18) with a through bore (22) extending between, and opening out to, the major side surfaces. Major cutting edges (34) are formed at the intersection of each major side surface with each end surface. Adjacent each major cutting edge, in each major side surface, is a primary relief surface (50). In each cross section of the cutting insert taken in a plane generally perpendicular to the major side surfaces, a line (L, LA, LB, LC) tangent to the primary relief surface at the major cutting edge is inclined to a median plane (M) of the cutting insert at an acute interior angle (X, XA, XB, XC).

Cette invention concerne une plaquette de coupe double face (10) utilisée dans une fraise à fileter (26) comportant deux surfaces d'extrémité opposées identiques (12) et deux surfaces latérales principales opposées identiques (18) comportant un alésage traversant (22) s'étendant entre les surfaces latérales principales et débouchant sur celles-ci. Des bords tranchants principaux (34) sont formés au niveau de l'intersection entre chaque surface latérale principale et chaque surface d'extrémité. Chaque bord tranchant principal adjacent, dans chaque surface latérale principale, est une surface de dépouille primaire (50). Dans chaque section transversale de la plaquette de coupe prise dans un plan globalement perpendiculaire aux surfaces latérales principales, une ligne (L, LA, LB, LC) tangente à la surface de dépouille principale au niveau du bord de coupe principal est inclinée par rapport à un plan médian (M) de la plaquette de coupe selon un angle intérieur aigu (X, XA, XB, XC).

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