Granted Patent B2

US 12,697,666 · App. 18/387,960 · Granted Aug 4, 2026

Inventors: Christian Strauchmann (Eggolsheim, DE); Jürgen Schwägerl (Vohenstrauss, DE); Herbert Rudolf Kauper (Erlangen, DE)

Assignee: KENNAMETAL INC.

B23B51/02B23B2251/04B23B2251/14B23B2251/40

Abstract

Claims (31)

1 . A cutting tool for the rotary machining of workpieces, wherein the cutting tool has a direction of rotation during use, the cutting tool comprising:

a cutting tip which has at least one main cutting edge and at least one free surface,

wherein a flank face adjoins the main cutting edge radially outward from the main cutting edge,

wherein the main cutting edge merges into an edge of the flank face and extends to a cutting corner,

wherein a flank angle of the flank face continuously increases in a radially outward direction to the cutting corner;

wherein a corner radius extends between an end point of the edge of the flank face and the cutting corner;

wherein the flank angle increases from the end point of the edge of the flank face to the cutting corner; and

wherein the cutting tool is a twist drill and wherein the workpieces are made of metal.

2 . The cutting tool according to claim 1 , wherein the flank angle increases by at least 2°.

3 . The cutting tool according to claim 1 , wherein the flank angle increases by at least 4°.

4 . The cutting tool according to claim 1 , wherein the corner radius is not tangent to a periphery and/or the at least one the free surface.

5 . A cutting tool for the rotary machining of workpieces, wherein the cutting tool has a direction of rotation during use, the cutting tool comprising:

a cutting tip which has at least one main cutting edge and at least one free surface,

wherein a flank face adjoins the main cutting edge radially outward from the main cutting edge,

wherein the main cutting edge merges into an edge of the flank face and extends to a cutting corner,

wherein a flank angle of the flank face continuously increases in a radially outward direction to the cutting corner;

wherein the flank angle increases from an end point of the edge of the flank face to the cutting corner;

wherein the cutting tool is a twist drill and wherein the workpieces are made of metal.

6 . The cutting tool according to claim 5 , wherein the flank angle increases by at least 2°.

7 . The cutting tool according to claim 5 , wherein the flank angle increases by at least 4°.

8 . A cutting tool for the rotary machining of workpieces, wherein the cutting tool has a direction of rotation during use, the cutting tool comprising:

a cutting tip which has at least one main cutting edge and at least one free surface,

wherein a flank face adjoins the main cutting edge radially outward from the main cutting edge,

wherein the main cutting edge merges into an edge of the flank face and extends to a cutting corner,

wherein a flank angle of the flank face continuously increases in a radially outward direction to the cutting corner;

wherein a convex corner radius extends between an end point of the edge of the flank face and the cutting corner;

wherein the flank angle increases from the end point of the edge of the flank face to the cutting corner; and

wherein the cutting tool is a twist drill and wherein the workpieces are made of metal.

9 . The cutting tool according to claim 8 , wherein the flank angle increases by at least 2°.

10 . The cutting tool according to claim 8 , wherein the flank angle increases by at least 4°.

11 . The cutting tool according to claim 8 , wherein the corner radius is not tangent to a periphery and/or the free surface.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (65)