US 10,406,611 B1Granted

Cutting tool and cutting insert having complementary engagement features for eccentric mounting

AssigneeIscar, Ltd.

InventorSergey Irlin

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Abstract

A cutting tool has a cutting body with a first insert pocket and an indexable cutting insert removably mounted therein. The first insert pocket has a first seat surface with a plurality of first engagement elements and a first support wall transverse thereto. The cutting insert has upper and lower surfaces and a boundary surface extending therebetween. The lower surface has a plurality of lower engaging elements and the boundary surface has a plurality of alternating first and second peripheral surfaces intersecting the upper surface to form first and second upper cutting edges. In each index position with the lower surface in contact with the first seat surface, the first support wall prevents translation of the cutting insert in a first direction, and the first engagement elements eccentrically contact the lower engaging elements to prevent translation of the cutting insert in a second direction perpendicular to the first direction.

Claims28

Dependent claims

A cutting tool (20) comprising a tool body (22) having a first insert receiving pocket (24) and an indexable cutting insert (26) removably mounted therein:

the first insert receiving pocket (24) comprising a first seat surface (28) and a first support wall (30) transverse thereto, the first seat surface (28) having a plurality of male or female first engagement elements (32a, 32b);
and
the cutting insert (26) comprising opposing upper and lower surfaces (36, 38) and a continuous boundary surface (40) extending therebetween,
the boundary surface (40) having a plurality of N1 first peripheral surfaces (48a, 48b) circumferentially alternating with a plurality of N1 second peripheral surfaces (50a, 50b),
each first peripheral surface (48a, 48b) intersecting the upper surface (36) to form a first upper cutting edge (52a, 52b), and
each second peripheral surface (50a, 50b) intersecting the upper surface (36) to form a second upper cutting edge (54a, 54b), and
the lower surface (38) having a plurality of discrete, spaced apart female or male lower engaging elements (64a, 64b),
wherein the cutting insert (26) is indexable about a first axis (A1) passing through the upper and lower surfaces (36, 38), and a median plane (M) perpendicular to the first axis (A1) intersects the boundary surface (40),
wherein the cutting insert (26) has N1 index positions with the lower surface (38) in contact with the first seat surface (28), and in each index position:
the first support wall (30) contacts the boundary surface (40) and prevents translation of the cutting insert (26) in a first direction (D1) along the first seat surface (28), and
the plurality of first engagement elements (32a, 32b) eccentrically contact the plurality of lower engaging elements (64a, 64b) and simultaneously prevent translation of the cutting insert (26) in a second direction (D2) perpendicular to the first direction (D1) along the first seat surface (28).

8 more elements

A square, double-sided cutting insert (26) indexable about a first axis (A1), comprising:

opposing upper and lower surfaces (36, 38), the upper and lower surfaces (36, 38) each having a square shape in a view thereof along the first axis (A1);
a median plane (M) perpendicular to the first axis (A1) and passing midway between the upper and lower surfaces (36, 38);
an insert bore (46) intersecting the upper and lower surfaces (36, 38) and passing through the median plane (M),
a continuous boundary surface (40) extending between the upper and lower surfaces (36, 38), the boundary surface (40) having two first peripheral surfaces (48a, 48b) circumferentially alternating with two second peripheral surfaces (50a, 50b) via a plurality of corner surfaces (56a, 56b;
58a, 58b);
the upper surface (36) having a pair of diametrically opposite raised corner edges (60a, 60b) formed at the intersection of upper surface (36) with a first diametrically opposite pair of corner surfaces (56a, 56b), and a pair of diametrically opposite lowered corner edges (62a, 62b) formed at the intersection of the upper surface (36) with a second diametrically opposite pair of corner surfaces (58a, 58b),
the lower surface (38) having a pair of diametrically opposite lowered corner edges (96a, 96b) formed at the intersection of lower surface (38) with the first diametrically opposite pair of corner surfaces (56a, 56b), and a pair of diametrically opposite raised corner edges (98a, 98b) formed at the intersection of the lower surface (38) with the second diametrically opposite pair of corner surfaces (58a, 58b),
a first plane (P1) containing the first axis (A1) and intersecting the raised corner edges (60a, 60b) of the upper surface (36) and the lowered corner edges (96a, 96b) of the lower surface (38),
a second plane (P2) containing the first axis (A1) and intersecting the lowered corner edges (62a, 62b) of the upper surface (36) and the raised corner edges (98a, 98b) of the lower surface (38);
wherein:
the upper surface (36) is provided with two discrete upper engaging elements (90a, 90b), which are formed on inclined portions of the upper surface (36), spaced apart from one another, and also spaced apart from both the insert bore (46) and the boundary surface (40),
the lower surface (38) is provided with two discrete lower engaging elements (64a, 64b), which are formed on inclined portions of the lower surface (38), spaced apart from one another, and also spaced apart from both the insert bore (46) and the boundary surface (40),
the first plane (P1) intersects the upper engaging elements (90a, 90b), but does not intersect the lower engaging elements (64a, 64b),
the second plane (P2) intersects the lower engaging elements (64a, 64b), but does not intersect the upper engaging elements (90a, 90b);
and
the cutting insert (26) only has 180° rotational symmetry about the first axis (A1).

13 more elements

Dependencies are inferred from the claim text.