| CPC B23C 5/2213 (2013.01) [B23C 5/06 (2013.01); B23C 2200/0494 (2013.01); B23C 2200/12 (2013.01); B23C 2200/208 (2013.01)] | 22 Claims |
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1. A cutting insert for a milling tool the cutting insert comprising:
a first side defining a first extension plane;
a second side opposite to the first side defining a second extension plane, wherein the first and second extension planes extend in parallel, and wherein a center axis extends perpendicularly through the first and second extension planes;
a circumferential surface extending between the first side and the second side, the circumferential surface including a first pair of opposing side surfaces and a second pair of opposing side surfaces;
a median plane extending halfway between the first extension plane and the second extension plane;
a longitudinal plane extending halfway between the first pair of opposing side surfaces, perpendicularly to the median plane and containing the center axis;
a central plane extending perpendicularly to both the median plane and the longitudinal plane and containing the center axis;
a first axis extending along an intersection between the median plane and the longitudinal plane and a second axis extending along an intersection between the median plane and the central plane, wherein
a first cutting edge extends along an intersection between the first side and the circumferential surface on a first side of the longitudinal plane, the first cutting edge, as seen in a view towards the first side, extending along a first corner of the cutting insert, wherein
a second cutting edge extends along an intersection between the second side and the circumferential surface on the first side of the longitudinal plane, the second cutting edge, as seen in a view towards the second side, extending along a second corner of the cutting insert, wherein
the first cutting edge includes a first main cutting edge, a first corner cutting edge, and a first auxiliary cutting edge, the first auxiliary cutting edge having a first surface-wiping secondary cutting edge, wherein the first main cutting edge adjoins the first corner cutting edge at a first end of the first main cutting edge, and the first corner cutting edge adjoins the first surface-wiping secondary cutting edge, wherein
the second cutting edge includes a second main cutting edge, a second corner cutting edge, and a second auxiliary cutting edge, the second auxiliary cutting edge having a second surface-wiping secondary cutting edge, wherein the second main cutting edge adjoins the second corner cutting edge at a first end of the second main cutting edge, and the second corner cutting edge adjoins the second surface-wiping secondary cutting edge, wherein
as seen in a view along the first axis towards a first side surface of the second pair of opposing side surfaces, a first axial relief face adjacent to the first auxiliary cutting edge and a first axial abutment face form part of a first surface grouping on the first side of the longitudinal plane, wherein
the first surface grouping forms part of the circumferential surface, wherein as seen in a view along the first axis towards a second side surface of the second pair of opposing side surfaces, a second axial relief face adjacent to the second auxiliary cutting edge and a second axial abutment face form part of a second surface grouping on the first side of the longitudinal plane (LP), wherein the second surface grouping forms part of the circumferential surface, wherein
a first side surface of the first pair of opposing side surfaces includes a first radial relief face arranged adjacent to the first main cutting edge, wherein as seen in a view along the center axis toward the first side of the cutting insert at least part of the first radial relief face extends outside of the first main cutting edge at least along a part of the main cutting edge, wherein
a second side surface of the first pair of opposing side surfaces includes a first radial abutment face and a second radial abutment face, wherein the first radial abutment face is arranged between the second side and the second radial abutment face, wherein the second radial abutment face is arranged between the first side and the first radial abutment face, wherein as seen in a plane parallel with the longitudinal plane the first axial relief face extends from the first surface-wiping cutting secondary edge at a first obtuse inner angle (X) to the median plane, wherein
the cutting insert has 180° rotational symmetry with respect to rotation about the second axis, wherein
as seen in a plane parallel with the longitudinal plane the second axial relief face extends from the second surface-wiping cutting secondary edge at a second obtuse inner angle to the median plane, wherein
the first axial abutment face forms a substantially flat surface, wherein
the first axial abutment face extends perpendicularly to the median plane, wherein
the second axial abutment face forms a substantially flat surface, wherein
the second axial abutment face extends perpendicularly to the median plane, and wherein
the first radial abutment face forms an obtuse third inner angle to the median plane, and wherein the second radial abutment face forms an obtuse fourth inner angle to the median plane.
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