US 12,076,026 B2
Method for producing a cutting tool, and cutting tool
Tim Guter, Fuerth (DE); and Jürgen Schwägerl, Vohenstrauss (DE)
Assigned to KENNAMETAL INC., Latrobe, PA (US)
Filed by Kennametal Inc., Latrobe, PA (US)
Filed on Dec. 7, 2020, as Appl. No. 17/113,535.
Application 17/113,535 is a division of application No. 16/381,853, filed on Apr. 11, 2019, granted, now 10,952,746.
Prior Publication US 2021/0085339 A1, Mar. 25, 2021
Int. Cl. B23B 51/02 (2006.01); A61B 17/16 (2006.01); B23B 51/00 (2006.01); B23P 15/32 (2006.01)
CPC A61B 17/1615 (2013.01) [B23B 51/00 (2013.01); B23P 15/32 (2013.01); B23B 51/02 (2013.01); B23B 2251/18 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for producing a drill bit having a front end (F) and a rear end (R), the front end (F) having a tool tip, the method comprising grinding a point thinning at the tool tip with a grinding tool that rotates about an axis of rotation (D), wherein, in a single grinding pass, the grinding tool is guided along a grinding path (P) along in a forward segment (P1) in which the grinding tool is guided toward the tool tip with the axis of rotation (D) orthogonal to a first grinding direction (S), and then the grinding tool is guided along the grinding path (P) in a reverse segment (P2) in which the grinding tool is guided away from the tool tip with the axis of rotation (D) orthogonal to a second grinding direction (S),
wherein the point thinning is ground with a constant point-thinning angle (AW) with respect to a longitudinal axis (A) of the drill bit, and
wherein a base of the point thinning has a width that is narrower at the front end of the drill bit and is wider distal the front end the tool tip of the drill bit.