Cutting tool
Cutting tool for the rotary machining of workpieces, in particular a twist drill, with 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 to the outside, and wherein a flank angle of the flank face increases in a radially outward direction.
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.