US 11,471,953 B2Granted

Double-ended cutting insert having mounting projection with insert upper abutment and insert stopper surfaces

AssigneeIscar, Ltd.

InventorShimon Athad

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Abstract

A cutting tool includes a two-way indexable cutting insert clamped in a transversely oriented insert receiving pocket of an insert holder. The insert holder includes a forwardly located insert mounting portion that includes upper and lower jaws which together define the insert receiving pocket having a pocket front opening. The lower jaw includes a pocket lower clamping surface. The upper jaw includes a pocket upper clamping surface which faces mutually towards the pocket lower clamping surface and a pocket stopper surface facing generally towards the pocket front opening. The pocket stopper surface is closer to the pocket lower clamping surface and further from the pocket front opening, than the pocket upper clamping surface. The pocket stopper surface is further from the pocket rear opening than the pocket lower clamping surface.

Claims16

Dependent claims

A double-ended cutting insert (22), longitudinally elongated in a direction defining an insert longitudinal axis (A), comprising:

two opposing insert end surfaces (86) and an insert peripheral surface (88) extending therebetween, the insert peripheral surface (88) extending circumferentially about the insert longitudinal axis (A) and comprising opposing insert upper and lower surfaces (90, 92) and two opposing insert side surfaces (94) which all connect the two insert end surfaces (86);
two cutting edges (96) formed at the intersection of the insert upper surface (90) and the two insert end surfaces (86), respectively;
and
a mounting projection (100) projecting from the insert upper surface (90), the mounting projection (100) comprising two insert bearing surfaces (102), offset in the direction of the insert longitudinal axis (A), and formed on the insert upper surface (90) above a cutting edge plane (EP), each cutting edge (96) being associated with the insert bearing surface (102) that is closest thereto;
wherein:
an insert median plane (MP) located between the insert upper and lower surfaces (90, 92) contains the insert longitudinal axis (A), and intersects the two opposing insert side surfaces (94) and also the two opposing insert end surfaces (86);
an insert longitudinal plane (IP) located between the opposite insert side surfaces (94) contains the insert longitudinal axis (A), and intersects the opposing insert upper and lower surfaces (90, 92) and also the opposing insert end surfaces (86);
the insert lower surface (92) comprises at least one insert lower abutment surface (98);
and
each insert bearing surface (102) comprises:
an insert upper abutment surface (104) which mutually faces away from the at least one insert lower abutment surface (98);
and
an insert stopper surface (110) which is closer to the associated cutting edge (96), and the insert lower abutment surface (98), than the insert upper abutment surface (104);
wherein:
the insert upper abutment surface (104) and the insert stopper surface (110) adjoin each other, and
the insert upper abutment surface (104) and the insert stopper surface (110) slope towards the insert median plane (MP) in a direction towards the associated cutting edge (96), the insert stopper surface (110) sloping more steeply than the insert upper abutment surface (104).

13 more elements

A double-ended cutting insert (22), longitudinally elongated in a direction defining an insert longitudinal axis (A), comprising:

two opposing insert end surfaces (86) and an insert peripheral surface (88) extending therebetween, the insert peripheral surface (88) extending circumferentially about the insert longitudinal axis (A) and comprising opposing insert upper and lower surfaces (90, 92) and two opposing insert side surfaces (94) which all connect the two insert end surfaces (86);
two cutting edges (96) formed at the intersection of the insert upper surface (90) and the two insert end surfaces (86), respectively;
and
a mounting projection (100) projecting from the insert upper surface (90) the mounting projection (100) comprising two insert bearing surfaces (102), offset in the direction of the insert longitudinal axis (A), and formed on the insert upper surface (90) above a cutting edge plane (EP), each rutting edge (96) being associated with the insert bearing surface (102) that is closest thereto;
wherein:
an insert median plane (MP) located between the insert upper and lower surfaces (90, 92) contains the insert longitudinal axis (A), and intersects the two opposing insert side surfaces (94) and also the two opposing insert end surfaces (86);
an insert longitudinal plane (IP) located between the opposite insert side surfaces (94) contains the insert longitudinal axis (A), and intersects the opposing insert upper and lower surfaces (90, 92) and also the opposing insert end surfaces (86);
the insert lower surface (92) comprises at least one insert lower abutment surface (98);
and
each insect bearing surface (102) comprises:
an insert upper abutment surface (104) which mutually faces away from the at least one insert lower abutment surface (98);
and
an insert stopper surface (110) which is closer to the associated cutting edge (96), and the insert lower abutment surface (98), than the insert upper abutment surface (104):
wherein:
the insert upper abutment surface (104) is further from the cutting edge plane (EP) than the insert stopper surface (110);
and
the insert upper abutment surface (104) and the insert stopper surface (110) slope towards the insert median plane (MP) in a direction towards the associated cutting edge (96), the insert stopper surface (110) sloping more steeply than the insert upper abutment surface (104).

14 more elements

A double-ended cutting insert (22), longitudinally elongated in a direction defining an insert longitudinal axis (A), comprising:

two opposing insert end surfaces (86) and an insert peripheral surface (88) extending therebetween, the insert peripheral surface (88) extending circumferentially about the insert longitudinal axis (A) and comprising opposing insert upper and lower surfaces (90, 92) and two opposing insert side surfaces (94) which all connect the two insert end surfaces (86);
two cutting edges (96) formed at the intersection of the insert upper surface (90) and the two insert end surfaces (86), respectively;
and
a mounting projection (100) comprising two insert bearing surfaces (102), offset in the direction of the insert longitudinal axis (A) and formed on the insert upper surface (90) above a cutting edge plane (EP), each cutting edge (96) being associated with the insert bearing surface (102) that is closest thereto wherein:
an insert median plane (MP) located between the insert upper and lower surfaces (90, 92) contains the insert longitudinal axis (A), and intersects the two opposing insert side surfaces (94) and also the two opposing insert end surfaces (86);
an insert longitudinal plane (IP) located between the opposite insert side surfaces (94) contains the insert longitudinal axis (A), and intersects the opposing insert upper and lower surfaces (90, 92) and also the opposing insert end surfaces (86);
the insert lower surface (92) comprises at least one insert lower abutment surface (98);
and
each insert bearing surface (102) comprises:
an insert upper abutment surface (104) which mutually faces away from the at least one insert lower abutment surface (98);
and
an insert, stopper surface (110) which is closer to the associated cutting edge (96), and the insert lower abutment surface (98), than the insert upper abutment surface (104);
wherein:
the insert upper abutment surface (104) is visible from an end view of the cutting insert (22) along the insert longitudinal axis (A) in front of the associated cutting edge (96);
and
the insert upper abutment surface (104) and the insert stopper surface (110) slope towards the insert median plane (MP) in a direction towards the associated cutting edge (96), the insert stopper surface (110) sloping more steeply than the insert upper abutment surface (104).

13 more elements

A double-ended cutting insert (22), longitudinally elongated in a direction defining an insert longitudinal axis (A), comprising:

two opposing insert end surfaces (86) and an insert peripheral surface (88) extending therebetween, the insert peripheral surface (88) extending circumferentially about the insert longitudinal axis (A) and comprising opposing insert upper and lower surfaces (90, 92) and two opposing insert side surfaces (94) which all connect the two insert end surfaces (86);
an insert central axis (F) perpendicular to and intersecting the longitudinal axis (A), the insert central axis (F) being located midway between the two insert end surfaces (86) and extending along a height direction of the insert;
two cutting edges (96) formed at the intersection of the insert upper surface (90) and the two insert end surfaces (86), respectively;
and
a mounting projection (100) projecting from the insert upper surface (90), the mounting projection (100) comprising two insert bearing surfaces (102), offset in the direction of the insert longitudinal axis (A), and formed on the insert upper surface (90) above a cutting edge plane (EP), each cutting edge (96) being associated with the insert bearing surface (102) that is closest thereto;
wherein:
the cutting insert exhibits 180° rotational symmetry about the insert central axis (F);
in both a side view and an end view of the cutting insert, the highest portion of the mounting projection (100) is at the insert central axis (F);
an insert median plane (MP) located between the insert upper and lower surfaces (90, 92) contains the insert longitudinal axis (A), and intersects the two opposing insert side surfaces (94) and also the two opposing insert end surfaces (86);
an insert longitudinal plane (IP) located between the opposite insert side surfaces (94) contains the insert longitudinal axis (A), and intersects the opposing insert upper and lower surfaces (90, 92) and also the opposing insert end surfaces (86);
the insert lower surface (92) comprises at least one insert lower abutment surface (98);
and
each insert bearing surface (102) comprises:
an insert upper abutment surface (104) which mutually faces away from the at least one insert lower abutment surface (98);
and
an insert stopper surface (110) which is closer to the associated cutting edge (96), and the insert lower abutment surface (98), than the insert upper abutment surface (104);
wherein:
the insert upper abutment surface (104) and the insert stopper surface (110) slope towards the insert median plane (MP) in a direction towards the associated cutting edge (96), the insert stopper surface (110) sloping more steeply than the insert upper abutment surface (104).

15 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/069,974Filed 14 Oct 2020 · division
Priority: 9 Mar 2019
Published: US 2021/0023633 A128 Jan 2021
Granted: 18 Oct 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B23B 29/043
Tool holders for a single cutting tool: with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts
B23C 5/2213
For plate-like cutting inserts: having a special shape
B23B 29/025
Boring bars: boring toolholders fixed on the boring bar
B23B 2200/082
Rake or top surfaces: with elevated clamping surface

Family

Application16/357,458Parent of this division · filed 9 Mar 2019
US 2021/0023633 A1Pre-grant publication · published 28 Jan 2021
US 10,857,603 B2Parent of this division
US 2020/0298325 A1Published application
US 11,471,953 B2This patent

From the US filing history. Foreign family members aren’t listed.