INDEXED BILATERAL NEGATIVE CUTTING PLATE, WITH PROTRUDING SIDE BEARING SURFACES, AND CUTTING TOOL Russian patent published in 2017 - IPC B23B27/16 

FIELD: machine engineering.

SUBSTANCE: cutting insert (14) includes an axle (A) indexing two opposing end surfaces (36), a peripheral side surface (38) which extends between, and opposing side cutting edges (46) formed between the end faces (36) and a peripheral side surface (38). Median plane (P) located midway between the end faces (36), passes through the peripheral side surface (38) and perpendicular to the axis (A) index. The peripheral side surface (38) comprises at least one protrusion (54) that extends outwardly relative to the axis (A) of indexing in a top surface of each end (36). The protrusion (54) comprises two lateral bearing surfaces (60) which converge in the outward direction to the median plane (P). Each cross-section is perpendicular to the median plane (P) and passing through the two opposing side cutting edges (46) and through at least one projection (54), no portion of the peripheral surface (38) is located inside an imaginary line (L1), connecting opposing side cutting edges (46). Wherein the second functional surfaces (56) are perpendicular to the plane (P).

EFFECT: increase of reliability of fixing the cutting insert in the insert pocket of the cutting tool body.

15 cl, 10 dwg