Cutting insert with split face clamping surfaces and toolholder therefor
AssigneeKennametal Inc.
InventorWilliam M. Alexander, IV
Life of this patent
Estimating the term…
Abstract
A cutting insert has a central cavity with a plurality of pairs of clamping surfaces wherein the clamping surfaces of a pair are separated from one another by a recess to provide split face clamping surfaces within the cavity of the insert. The insert may be secured within the pocket of a toolholder.
Claims37
A toolholder assembly comprised of:
- a) a toolholder with a body having a pocket formed therein which has at least one side wall and a bottom wall;
- b) a cutting insert with an insert body having:
- i) a top and a bottom surface;
- ii) a peripheral wall therebetween;
- iii) a cutting edge formed by the intersection of the peripheral wall and the top surface;
- iv) wherein a central cavity extends within the top surface and has cavity walls defining a plurality of pairs of clamping surfaces;
- v) wherein the clamping surfaces of a pair are separated from one another by a recess;
- vi) wherein for each pair of clamping surfaces, the associated recess is comprised of two other clamping surfaces associated with different pairs of clamping surfaces and the two other clamping surfaces within the recess converge as they extend away from the central longitudinal axis;
- vii) wherein the insert mounts within the toolholder pocket;
- and
- c) a clamp mounted upon the toolholder with a protruding nose which jointly engages one pair of the insert clamping surfaces and urges the insert into the pocket.
A cutting insert intended to be held within a toolholder by a clamp comprised of a body of wear-resistant material, said body having a central longitudinal axis extending therethrough and having:
- a) a top surface and a bottom surface;
- b) a peripheral wall therebetween;
- c) a cutting edge formed by the intersection of the peripheral wall and the top surface;
- d) wherein a central cavity extends within the top surface and has cavity walls defining a plurality of pairs of clamping surfaces;
- e) wherein the clamping surfaces of a pair are separated from one another by a recess;
- f) wherein both clamping surfaces of a pair are coplanar with one another;
- and
- g) wherein for each pair of clamping surfaces, the associated recess is comprised of two other clamping surfaces associated with different pairs of clamping surfaces and the two other clamping surfaces within the recess converge as they extend away from the central longitudinal axis.
A cutting insert intended to be held within a toolholder by a clamp comprised of a body of wear-resistant material, said body having a central longitudinal axis extending therethrough and having:
- a) a top surface and a bottom surface;
- b) a peripheral wall therebetween;
- c) a cutting edge formed by the intersection of the peripheral wall and the top surface;
- d) wherein a central cavity extends within the top surface and has cavity walls defining a plurality of pairs of clamping surfaces;
- e) wherein the clamping surfaces of a pair are separated from one another by a recess;
- f) wherein both clamping surfaces of a pair are planar;
- and
- g) wherein for each pair of clamping surfaces, the associated recess is comprised of two other clamping surfaces associated with different pairs of clamping surfaces and the two other clamping surfaces within the recess converge at an angle as they extend away from the central longitudinal axis;
- h) wherein lines extending inwardly from each planar clamping surface of a pair intersect with one another along a line bisecting the angle of the recess between the pair of clamping surfaces.
A cutting insert intended to be held within a toolholder by a clamp comprised of a body of wear-resistant material, said body having a central longitudinal axis extending therethrough and having:
- a) a top surface and a bottom surface;
- b) a peripheral wall therebetween;
- c) a cutting edge formed by the intersection of the peripheral wall and the top surface;
- d) wherein a central cavity extends within the top surface and has cavity walls defining a plurality of pairs of clamping surfaces;
- e) wherein the clamping surfaces of a pair are separated from one another by a recess;
- f) wherein both clamping surfaces of a pair are convexly curved;
- g) wherein for said pair of clamping surfaces, the associated recess is comprised of two other clamping surfaces associated with different pairs of clamping surfaces and the two other clamping surfaces within the recess converge as they extend away from the central longitudinal axis;
- and
- h) wherein a common line intersects one tangential point along each clamping surface of a pair.
Dependencies are inferred from the claim text.