Cutting insert having a rearwardly offset cutting edge and cutting tool

摘要

A cutting insert includes opposing forward and rear surfaces and a peripheral surface extending therebetween. The peripheral surface includes opposing side surfaces and opposing upper and lower surfaces. The upper surface and the forward surface intersect to form a main cutting edge having an associated relief surface that extends therefrom in the forward surface. One of the side surfaces comprises an insert side abutment surface. The rear surface comprises an insert rear abutment surface. The lower surface comprises an insert lower abutment surface. The insert rear and insert lower abutment surfaces form an obtuse abutment angle with respect to each other. In a side view along a side axis, a relief surface line tangent to the relief surface intersects the insert lower abutment surface.

主权项

1. A cutting insert (22) having an insert longitudinal axis (A), the cutting insert (22) comprising:
opposing forward and rear surfaces (34, 36) and a peripheral surface (28) extending therebetween, the peripheral surface (28) comprising opposing side surfaces (26) connecting opposing upper and lower surfaces (38, 40); and an insert through bore (30) passing through the side surfaces (26) along a side axis (S); wherein:
the forward and upper surfaces (34, 38) intersect to form a main cutting edge (42) having an associated relief surface (44) that extends therefrom in the forward surface (34);one of the side surfaces (26) comprises an insert side abutment surface (60);the rear surface (36) comprises an insert rear abutment surface (50);the lower surface (40) comprises an insert lower abutment surface (52); andthe insert rear and lower abutment surfaces (50, 52) form an obtuse abutment angle (α) with respect to each other; wherein
in a side view of the cutting insert (22) along the side axis (S), a relief surface line (LR) tangent to the relief surface (44) intersects the insert lower abutment surface (52).