US 11,446,745 B2Granted

Turning insert having peninsula and island protrusions, and turning tool

AssigneeIscar, Ltd.

InventorsAmjad Dakwar, Daniel Hen

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Abstract

A turning insert has two opposite main surfaces and a peripheral surface which extends therebetween and has N side surfaces, where 2<N<9. The insert has mirror symmetry about a mid-plane and 360/N degree rotational symmetry about a central axis perpendicular to the mid-plane. The insert has two main edges which each have N main cutting edges and N corner cutting edges. Each main cutting edge has two raised edge portions and a lowered edge portion. Each main surface has N main rake surfaces and N corner rake surfaces. Each main surface further has at least N convex island protrusions and N at least partially convex peninsula protrusions, any and all island protrusions associated with a given main rake surface being located between two adjacent peninsula protrusions, each pair of adjacent peninsula protrusions having at least one island protrusion located therebetween.

Claims20

Dependent claims

A turning insert (14) having a central axis (H), the turning insert (14) comprising:

two opposite polygonal main surfaces (16) and a peripheral surface (18) extending therebetween, the peripheral surface (18) extending circumferentially about the central axis (H) and having an integer number N side surfaces, where 2<N<9;
the turning insert (14) having mirror symmetry about a mid-plane (P) oriented perpendicular to the central axis (H) and passing midway between the two main surfaces (16) through the peripheral surface (18) and 360/N degree rotational symmetry about the central axis (H);
and
two main edges (20), each being formed at respective intersections between the peripheral surface (18) and the two main surfaces (16), each main edge (20) comprising:
N main cutting edges (22) and N corner cutting edges (24), each corner cutting edge (24) extending between, and connecting, two adjacent main cutting edges (22), each main cutting edge (22) comprising two raised edge portions (28) and a lowered edge portion (26) extending therebetween, the raised edge portions (28) being located farther from the mid-plane (P) than the lowered edge portion (26) in a direction along the central axis (H);
wherein:
each main surface (16) comprises:
N main rake surfaces (31), each rake surface (31) extending from a respective main cutting edge (22) towards the central axis (H);
N corner rake surfaces (33), each corner rake surface (33) extending from a respective corner cutting edge (24) towards the central axis (H) and located between two adjacent main rake surfaces (31);
N at least partially convex peninsula protrusions (42), each projecting from the main surface (16) and extending in a direction from the central axis (H) towards an associated corner cutting edge (24);
and
at least N convex island protrusions (34), each at least partially on an associated main rake surface (31), each having an oval shape in a plan view of the turning insert (14) perpendicular to the mid-plane (P), any and all island protrusions (34) associated with a given main rake surface (31) being located between two adjacent peninsula protrusions (42), each pair of adjacent peninsula protrusions (42) having at least one island protrusion (34) located therebetween.

9 more elements

A turning insert (14) having a central axis (H), the turning insert (14) comprising:

two opposite polygonal main surfaces (16) and a peripheral surface (18) extending therebetween, the peripheral surface (18) extending circumferentially about the central axis (H) and having an integer number N side surfaces, where 2<N<9;
the turning insert (14) having mirror symmetry about a mid-plane (P) oriented perpendicular to the central axis (H) and passing midway between the two main surfaces (16) through the peripheral surface (18) and 360/N degree rotational symmetry about the central axis (H);
and
two main edges (20), each being formed at respective intersections between the peripheral surface (18) and the two main surfaces (16), each main edge (20) comprising:
N main cutting edges (22) and N corner cutting edges (24), each corner cutting edge (24) extending between, and connecting, two adjacent main cutting edges (22), each main cutting edge (22) comprising two raised edge portions (28) and a lowered edge portion (26) extending therebetween, the raised edge portions (28) being located farther from the mid-plane (P) than the lowered edge portion (26) in a direction along the central axis (H);
wherein:
each main surface (16) comprises:
N main rake surfaces (31), each rake surface (31) extending from a respective main cutting edge (22) towards the central axis (H);
N corner rake surfaces (33), each corner rake surface (33) extending from a respective corner cutting edge (24) towards the central axis (H) and located between two adjacent main rake surfaces (31);
N at least partially convex peninsula protrusions (42), each projecting from the main surface (16) and extending in a direction from the central axis (H) towards an associated corner cutting edge (24);
and
at least N convex island protrusions (34), each at least partially on an associated main rake surface (31), any and all island protrusions (34) associated with a given main rake surface (31) being located between two adjacent peninsula protrusions (42), each pair of adjacent peninsula protrusions (42) having at least one island protrusion (34) located therebetween;
and
each main surface (16) comprises a planar main abutment surface (36) which is parallel to the mid-plane (P) and located farther therefrom than the island protrusions (34), in a direction perpendicular the mid-plane (P).

11 more elements

A turning insert (14) having a central axis (H), the turning insert (14) comprising:

two opposite polygonal main surfaces (16) and a peripheral surface (18) extending therebetween, the peripheral surface (18) extending circumferentially about the central axis (H) and having an integer number N side surfaces, where 2<N<9;
the turning insert (14) having mirror symmetry about a mid-plane (P) oriented perpendicular to the central axis (H) and passing midway between the two main surfaces (16) through the peripheral surface (18) and 360/N degree rotational symmetry about the central axis (H);
and
two main edges (20), each being formed at respective intersections between the peripheral surface (18) and the two main surfaces (16), each main edge (20) comprising:
N main cutting edges (22) and N corner cutting edges (24), each corner cutting edge (24) extending between, and connecting, two adjacent main cutting edges (22), each main cutting edge (22) comprising two raised edge portions (28) and a lowered edge portion (26) extending therebetween, the raised edge portions (28) being located farther from the mid-plane (P) than the lowered edge portion (26) in a direction along the central axis (H);
wherein:
each main surface (16) comprises:
N main rake surfaces (31), each rake surface (31) extending from a respective main cutting edge (22) towards the central axis (H);
N corner rake surfaces (33), each corner rake surface (33) extending from a respective corner cutting edge (24) towards the central axis (H) and located between two adjacent main rake surfaces (31);
N at least partially convex peninsula protrusions (42), each projecting from the main surface (16) and extending in a direction from the central axis (H) towards an associated corner cutting edge (24);
and
at least N convex island protrusions (34), each at least partially on an associated main rake surface (31), any and all island protrusions (34) associated with a given main rake surface (31) being located between two adjacent peninsula protrusions (42), each pair of adjacent peninsula protrusions (42) having at least one island protrusion (34) located therebetween;
no island protrusion (34) extends farther from the mid-plane (P) than a lowered edge portion (26), in a direction perpendicular to the mid-plane (P);
and
each peninsula protrusion (42) extends farther from the mid-plane (P) than an adjacent raised edge portion (28), in a direction perpendicular to the mid-plane (P).

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/532,665Filed 6 Aug 2019 · us provisional application
Priority: 27 Sep 2018
Published: US 2020/0101540 A12 Apr 2020
Granted: 20 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B23B 27/141
Cutting tools of which the bits or tips or cutting inserts are of special material: specially shaped plate-like cutting inserts, i.e. length…
B23B 27/1622
With plate-like cutting inserts of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall…
B23B 27/1607
With specially shaped plate-like exchangeable cutting inserts, e.g. chip-breaking groove: characterised by having chip-breakers
B23B 2200/0414
Hexagonal: rounded