US 6,604,893 B2 · Cutting insert with wiper

Abstract

A cutting insert includes an upper, lower and side surfaces and at least one leading cutting edge and a trailing wiper edge formed at an intersection of the upper surface with the side surface. A corner separates the leading cutting edge from the trailing wiper edge. The top surface includes a plurality of planar rake surfaces that extend inwardly and downwardly toward a seating surface of the insert. The top surface also includes a plurality of chip deflecting surfaces extending inwardly and upwardly toward the seating surface to form a transition zone between adjacent rake surfaces. The rake surfaces form a land angle with respect to a line perpendicular to the leading cutting edges. Additionally, a back wall surface extends upwardly from the rake surfaces to the seating surface to form a transition zone between the rake surfaces and the seating surface.

Claims16

Dependent claims

An indexable cutting insert, comprising:

a polygonal body of wear resistant material, the body including a center, top and bottom surfaces, and a plurality of side surfaces between the top and bottom surfaces;
a plurality of leading cutting edges formed at an intersection of the plurality of side surfaces and the top surface;
a plurality of wiper edges formed at the intersection of the plurality of side surfaces and the top surface;
and
a corner separating each leading cutting edge and each wiper edge,
wherein for a cutting operation the insert engages a workpiece using one of the leading cutting edges for coarse cutting operations and one of the wiper edges for fine cutting operations,
wherein the top surface includes a rake surface extending inwardly from each leading cutting edge toward the center of the insert body, and
wherein the top surface includes a deflecting surface extending upwardly and inwardly toward the center region of the insert body and away from the leading cutting edge to form a transition zone between adjacent rake surfaces.

5 more elements

Dependencies are inferred from the claim text.

Cutting insert with wiper

Life of this patent

Cutting insert with wiper

Life of this patent

Abstract

Claims16