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 face;
- a rear face;
- a plurality of side faces adjoining the front face and the rear face, wherein each side face comprises a seating surface;
- a cutting edge formed at the intersection of each side face and the front face;
- a cutting lip extending rearwardly from the cutting edge, the cutting lip overhanging the seating surface;
- and
- a top transition edge connecting the seating surface and the cutting lip,
- wherein the top transition edge comprises a lip support extending rearwardly from the cutting lip to the seating surface, and
- wherein a width of the lip support decreases 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 bottom seating surface;
- a pocket rear surface comprising an upper portion above a lower portion, the upper portion being offset from the lower portion;
- and
- a first sidewall portion extending forward from the pocket rear surface:
- 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 face;
- a rear face;
- a plurality of side faces adjoining the front face and the rear face, wherein each side face comprises a seating surface;
- a cutting edge formed at the intersection of each side face and the front face;
- a cutting lip extending rearwardly from the cutting edge, the cutting lip extending radially outward from the seating surface;
- and
- a top transition edge connecting the seating surface and the cutting lip,
- wherein the top transition edge comprises a lip support extending rearwardly from the cutting lip to the seating surface, and
- wherein a width of the lip support decreases rearwardly from the cutting lip to the seating surface.
Dependencies are inferred from the claim text.