US 12,186,813 B2
Cutting insert and machining tool
Fabian Birkmann, Schwaig (DE); and Igor Kaufmann, Nuremberg (DE)
Assigned to KENNAMETAL INC., Latrobe, PA (US)
Filed by KENNAMETAL INC., Latrobe, PA (US)
Filed on Jun. 29, 2021, as Appl. No. 17/362,069.
Claims priority of application No. 102020117101.3 (DE), filed on Jun. 29, 2020.
Prior Publication US 2021/0402488 A1, Dec. 30, 2021
Int. Cl. B23B 27/16 (2006.01)
CPC B23B 27/1611 (2013.01) 16 Claims
OG exemplary drawing
 
1. A cutting insert for a machining tool, comprising:
a cutting edge connecting two corners of the cutting insert, a first chamfer proximate the cutting edge;
a second chamfer disposed between the first chamfer and a flute, the flute having a surface defining a flute contour;
a first chip breaker element projecting into an interior of the flute;
a second chip breaker element disposed only in a central region approximately midway between the two corners of the cutting insert, the second chip breaker element including a chip guiding surface extending from the flute contour of the flute; and
a chip guide finger disposed in an end region of the flute,
wherein the first chip breaker element comprises a first chip guiding surface higher in elevation than the flute contour along an entire length of the chip guiding surface, and
wherein the chip guide finger is positioned between one of the two corners of the cutting insert and the chip breaker element.