Cutting insert
AssigneeKennametal Inc.
InventorKenneth G. DeRoche
Life of this patent
Estimating the term…
Abstract
The present invention relates to a cutting insert for enhanced chip control. The insert includes a rake surface extending partially along a side cutting edge of the insert to a transition location and extending inwardly toward the center of the insert. A deflecting surface extends upwardly and inwardly toward the center of the insert from the rake surface and beyond the transition location extends upwardly and inwardly from the side cutting edge.
Claims21
An indexable cutting insert comprising a polygonal body of wear resistant material wherein the body has a center and includes top and bottom surfaces and therebetween a peripheral wall with sides and corners, wherein the intersection of the peripheral wall and the top surface forms a cutting edge extending from a first corner, along a side to a second corner, wherein for a cutting operation the insert is intended to engage a workpiece using the cutting edge, wherein the top surface comprises:
- a) a rake surface extending inwardly from the cutting edge toward the center of the insert along a length of the cutting edge from the first corner to a transition location spaced from the second corner;
- b) a deflecting surface extending upwardly and extending inwardly toward the center of the insert body along the length of the cutting edge;
- c) wherein between the first corner and the transition location the deflecting surface is recessed from the cutting edge and adjacent to the rake surface;
- and
- d) wherein the deflecting surface between the transition location and the second corner is directly adjacent to the cutting edge.
An assembly of a toolholder and an indexable cutting insert wherein the cutting insert is mounted within a seat in the toolholder and wherein the cutting insert comprises a polygonal body of wear resistant material wherein the body has a center and includes top and bottom surfaces and therebetween a peripheral wall with sides and corners, wherein the intersection of the peripheral wall and the top surface forms a cutting edge extending from a first corner, along a side to a second corner, wherein for a cutting operation the insert is intended to engage a workpiece using the cutting edge, wherein the top surface comprises:
- a) a rake surface extending inwardly from the cutting edge toward the center of the insert body along a length of the cutting edge from the first corner to a transition location spaced from the second corner;
- b) a deflecting surface extending upwardly and extending inwardly toward the center of the insert body along the length of the cutting edge;
- c) wherein between the first corner and the transition location the deflecting surface is recessed from the cutting edge and adjacent to the rake surface;
- and
- d) wherein the deflecting surface is directly adjacent to the cutting edge between the transition location and the second corner.
Dependencies are inferred from the claim text.