Cutting insert with seating surface and lip support
AssigneeKennametal Inc.
InventorsRavi Halasur, Horst Jäger, Poornachander Shanthamraju, Mahesh Todkar
Life of this patent
Estimating the term…
Abstract
The present invention provides a cutting insert with a lip support providing additional support for the cutting insert. The cutting insert may be secured to a pocket of a drilling tool. The cutting insert may include a front surface, rear surface, and side surfaces. Cutting edges may form at the intersection of the side surfaces and the front surface. A cutting lip may extend rearwardly from the cutting edges with a seating surface under the cutting lip. The transition between the seating surface and the cutting lip may include two chamfers separated by a lip support.
Claims20
A cutting insert comprising:
- a front surface centered around a longitudinal axis;
- a rear surface;
- a plurality of side surfaces adjoining the front surface and the rear surface, wherein each side surface comprises a seating surface and a corner surface connecting the side surface to an adjacent side surface;
- a first cutting edge, a second cutting edge, and a third cutting edge at the intersection of each side surface and the top surface, wherein the second cutting edge comprises a convex curve and connects the first cutting edge to the third cutting edge;
- a cutting lip extending rearwardly from the first cutting edge, second cutting edge, and third cutting edge, and raised from the seating surface;
- and
- a transition between the seating surface and the cutting lip comprising a lip support extending rearwardly from the cutting lip to the seating surface.
A drilling tool system comprising:
- a drilling tool;
- and
- a cutting insert, the cutting insert being secured into the drilling tool;
- wherein the drilling tool comprises:
- a drilling body comprising a central longitudinal rotational axis, and an interior pocket in a front drilling face, the interior pocket comprising:
- a first sidewall portion extending forward from the pocket rear surface;
- a bottom seating surface;
- and
- a pocket rear surface comprising an upper portion above a lower portion, the upper portion being offset from the lower portion;
- wherein the lower portion comprises a rearwardly extending indent with an indent height being less than a lower portion height;
- and
- wherein the cutting insert comprises:
- a front surface centered around a longitudinal axis;
- a rear surface;
- a plurality of side surfaces adjoining the front surface and the rear surface, wherein each side surface comprises a seating surface and a corner surface connecting the side surface to an adjacent side surface;
- a first cutting edge, a second cutting edge, and a third cutting edge at the intersection of each side surface and the top surface, wherein the second cutting edge comprises a convex curve and connects the first cutting edge to the third cutting edge;
- a cutting lip extending rearwardly from the first cutting edge, second cutting edge, and third cutting edge, and raised from the seating surface;
- and
- a transition between the seating surface and the cutting lip comprising a lip support extending rearwardly from the cutting lip to the seating surface.
A drilling tool comprising:
- a drilling body comprising a central longitudinal rotational axis, and an interior pocket in a front drilling face, the interior pocket comprising:
- a first sidewall portion extending forward from the pocket rear surface;
- and
- a bottom seating surface;
- and
- a pocket rear surface comprising an upper portion above a lower portion, the upper portion being offset from the lower portion;
- wherein the lower portion comprises a rearwardly extending indent with an indent height being less than a lower portion height.
Dependencies are inferred from the claim text.