Patent ID: 9662722
Date: 2017-05-30
CPC Classifications: B23C,Y10T

Claim:
1. A cutting insert for a tool for machining a workpiece, wherein the cutting insert has three main geometrical axes, an x-axis, a y-axis, and a z-axis, which are oriented orthogonally to one another, wherein the cutting insert has a 180° rotational symmetry about the x-axis, about the y-axis and about the z-axis, respectively, and wherein the cutting insert comprises: a first and a second base surface which are arranged mutually opposite to one another, wherein at least a part of each of the first and the second base surface is oriented orthogonally to the z-axis; a first and a second main side surface which are arranged mutually opposite to one another and extend between the two base surfaces, wherein at least a part of each of the first and the second main side surface is oriented orthogonally to the x-axis; a first and a second secondary side surface which are arranged mutually opposite to one another and extend between the two base surfaces, wherein at least a part of each of the first and the second secondary side surface is oriented orthogonally to the y-axis; four main cutting edges, wherein a first one of the four main cutting edges is arranged between the first base surface and the first main side surface, a second one of the four main cutting edges is arranged between the second base surface and the first main side surface, a third one of the four main cutting edges is arranged between the second base surface and the second main side surface, and a fourth one of the four main cutting edges is arranged between the first base surface and the second main side surface; four first segmental cutting edges, wherein a first and a second one of the four first segmental cutting edges are arranged in diagonally opposite corners of the first main side surface, a third and a fourth one of the four first segmental cutting edges are arranged in diagonally opposite corners of the second main side surface, and wherein the first one of the first segmental cutting edges adjoins a first end of the first main cutting edge, the second one of the first segmental cutting edges adjoins a first end of the second main cutting edge, the third one of the first segmental cutting edges adjoins a first end of the third main cutting edge, and the fourth one of the first segmental cutting edges adjoins a first end of the fourth main cutting edge; four secondary cutting edges, each of which extends in a rectilinear manner and adjoins one of the four first segmental cutting edges, respectively, wherein a first one of the four secondary cutting edges is arranged at a transition between the first main side surface and the first secondary side surface, a second one of the four secondary cutting edges is arranged at a transition between the first main side surface and the second secondary side surface, a third one of the four secondary cutting edges is arranged at a transition between the second main side surface and the first secondary side surface, and a fourth one of the four secondary cutting edges is arranged at a transition between the second main side surface and the second secondary side surface; four first protrusions, wherein a first and a third one of the four first protrusions are arranged in diagonally opposite corners of the first secondary side surface, wherein a second and a fourth one of the four first protrusions are arranged in diagonally opposite corners of the second secondary side surface, and wherein each of the first protrusions defines a first clearance angle; wherein the first and the second main cutting edges and the first and the second one of the first segmental cutting edges are arranged in a first cutting edge plane, wherein the third and the fourth main cutting edges and the third and the fourth one of the first segmental cutting edges are arranged in a second cutting edge plane, wherein the first and the second cutting edge planes are parallel to one another and extend orthogonally to the x-axis; wherein each of the first segmental cutting edges is arranged on one of the four first protrusions, respectively; and wherein each secondary cutting edge encloses a second clearance angle with a parallel to the z-axis.