ASSEMBLY COMPRISING RHOMBUS-SHAPED INSERT AND SUPPORT SEAT AND RHOMBUS-SHAPED REVERSIBLE CUTTING INSERT Russian patent published in 2020 - IPC B23B27/16 

FIELD: turning; drilling.

SUBSTANCE: assembly (20) of rhombus-shaped double-sided cutting insert (22) and fastening seat (24). Each end surface (26) of cutting insert (22) has an angular abutment surface (38) adjacent to each cutting edge (36) at the apex, at least one inner thrust surface (40a, 40b) on one side of the transverse plane (P2) and at least one inner thrust surface (40a, 40b) on opposite side of transverse plane (P2). Each angular thrust surface (38) is located closer to middle plane (M), than adjacent cutting edge (36) at vertex. In each indexing position of cutting insert (22) on mounting seat (24) only one angular abutment surface (38) is in working contact with one (44a) of plurality of protruding support members (44a, 44b, 44c) of attachment seat (24) and only at least one inner thrust surface (40a, 40b) located on opposite side of transverse plane (P2) relative to working angular abutment surface (38), is in contact with at least one remaining support element (44b, 44c).

EFFECT: higher stability of fastening of cutting insert in seat.

22 cl, 9 dwg