US 7,246,973 B2Granted

Tangential cutting insert and milling cutter

AssigneeIngersoll Cutting Tool Company

InventorsWilliam Bennett Johnson, Neil A. Vogeler

Life of this patent

Estimating the term…

Loading patent…

Abstract

A tangential milling cutting insert has two identical opposing end surfaces with two identical opposing major side surfaces of a generally parallelogrammatic shape and two identical opposing minor side surfaces extending between them. An ambidextrous tangential cutting insert has two non-identical end surfaces and two opposing major side surfaces of a generally trapezoidal nature. In either cutting insert, each end surface has a peripheral cutting edge and four corners of which two diagonally opposed corners are lowered and the other two are raised. Each end surface has four separate planar regions arranged in pairs, the planar regions do not protrude relative to the surrounding end surface and the two planar regions of a given pair of planar regions slope in opposite directions with respect to a median plane of the cutting insert.

Claims22

Dependent claims

A tangential cutting insert, comprising:

two opposing end surfaces, each end surface having a generally rectangular shape in an end view of the cutting insert;
each end surface having four corners, two diagonally opposed lowered corners and two diagonally opposed raised corners, the lowered corners being closer to a median plane M of the cutting insert than the raised corners, the median plane M being located between the opposing end surfaces;
a peripheral side surface extending between the two opposing end surfaces, the peripheral side surface comprising two opposing major side surfaces connected to two opposing minor side surfaces;
a through bore extending between the major side surfaces and having a bore axis;
a peripheral cutting edge formed at the intersection of each end surface and the peripheral side surface, each peripheral cutting edge including major cutting edges formed at the intersection of the major side surfaces with an end surface;
a major plane P2 located between the major side surfaces and perpendicular to the median plane M;
a minor plane P1 located between the minor side surfaces and perpendicular to both the median plane M and the major plane P2;
wherein:
each end surface comprises first and second abutment surfaces that:
(a) are located on opposite sides of the minor plane P1, and (b) are spaced apart from one another;
the first abutment surface comprises a first abutment region that is on a first side of the major plane P2;
the second abutment surface comprises a second abutment region that is also on the first side of the major plane P2;
in each cross-section of the cutting insert that (a) is taken in a plane parallel to the minor plane P1, and (b) passes through the first abutment region of a given end surface, the first abutment region slopes in a first direction relative to said major plane P2;
and
in each cross-section of the cutting insert that (a) is taken in a plane parallel to the minor plane P1, and (b) passes through the second abutment region of the given end surface, the second abutment region slopes in a second direction relative to said major plane P2, the second direction being opposite the first direction.

12 more elements

A tangential cutting insert, comprising:

two opposing end surfaces, each end surface having a generally rectangular shape in an end view of the cutting insert;
each end surface having four corners, two diagonally opposed lowered corners and two diagonally opposed raised corners, the lowered corners being closer to a median plane M of the cutting insert than the raised corners, the median plane M being located between the opposing end surfaces;
a peripheral side surface extending between the two opposing end surfaces, the peripheral side surface comprising two opposing major side surfaces connected to two opposing minor side surfaces;
a through bore extending between the major side surfaces and having a bore axis;
a peripheral cutting edge formed at the intersection of each end surface and the peripheral side surface, each peripheral cutting edge including major cutting edges formed at the intersection of the major side surfaces with an end surface;
a major plane P2 located between the major side surfaces and perpendicular to the median plane M;
a minor plane P1 located between the minor side surfaces and perpendicular to both the median plane M and the major plane P2;
wherein:
each end surface comprises first and second abutment surfaces that:
(a) are located on opposite sides of the minor plane P1, and (b) are spaced apart from one another;
the first abutment surface comprises a first abutment region that is on a first side of the major plane P2;
the second abutment surface comprises a second abutment region that is also on the first side of the major plane P2;
neither of the first and second abutment regions protrudes relative to the surrounding end surface;
and
in each cross section of the cutting insert taken in a plane parallel to the minor plane P1, each end surface has a smoothly varying profile.

12 more elements

A milling cutter comprising:

a cutter body comprising at least one insert pocket having adjacent side and rear walls generally transverse to a pocket base, the side wall comprising an axial location surface, the rear wall being provided with two tangential location surfaces, a first tangential location surface being proximal the axial location surface and a second tangential location surface being distal the axial location surface;
a tangential cutting insert seated in the at least one insert pocket, the tangential cutting insert comprising:
two opposing end surfaces, each end surface having a generally rectangular shape in an end view of the cutting insert;
each end surface having four corners, two diagonally opposed lowered corners and two diagonally opposed raised corners, the lowered corners being closer to a median plane M of the cutting insert than the raised corners, the median plane M being located between the opposing end surfaces;
a peripheral side surface extending between the two opposing end surfaces, the peripheral side surface comprising two opposing major side surfaces connected to two opposing minor side surfaces;
a through bore extending between the major side surfaces and having a bore axis;
a peripheral cutting edge formed at the intersection of each end surface and the peripheral side surface, each peripheral cutting edge including major cutting edges formed at the intersection of the major side surfaces with an end surface;
a major plane P2 located between the major side surfaces and perpendicular to the median plane M;
a minor plane P1 located between the minor side surfaces and perpendicular to both the median plane M and the major plane P2;
wherein:
each end surface comprises first and second abutment surfaces that:
(a) are located on opposite sides of the minor plane P1, and (b) are spaced apart from one another;
the first abutment surface comprises a first abutment region that is on a first side of the major plane P2;
the second abutment surface comprises a second abutment region that is also on the first side of the major plane P2;
in each cross-section of the cutting insert that (a) is taken in a plane parallel to the minor plane P1, and (b) passes through the first abutment region of a given end surface, the first abutment region slopes in a first direction relative to said major plane P2;
and
in each cross-section of the cutting insert that (a) is taken in a plane parallel to the minor plane P1, and (b) passes through the second abutment region of the given end surface, the second abutment region slopes in a second direction relative to said major plane P2, the second direction being opposite the first direction.

14 more elements

A milling cutter comprising:

a cutter body comprising at least one insert pocket having adjacent side and rear walls generally transverse to a pocket base, the side wall comprising an axial location surface, the rear wall being provided with two tangential location surfaces, a first tangential location surface being proximal the axial location surface and a second tangential location surface being distal the axial location surface;
a tangential cutting insert seated in the at least one insert pocket, the tangential insert comprising:
two opposing end surfaces, each end surface having a generally rectangular shape in an end view of the cutting insert;
each end surface having four corners, two diagonally opposed lowered corners and two diagonally opposed raised corners, the lowered corners being closer to a median plane M of the cutting insert than the raised corners, the median plane M being located between the opposing end surfaces;
a peripheral side surface extending between the two opposing end surfaces, the peripheral side surface comprising two opposing major side surfaces connected to two opposing minor side surfaces;
a through bore extending between the major side surfaces and having a bore axis;
a peripheral cutting edge formed at the intersection of each end surface and the peripheral side surface, each peripheral cutting edge including major cutting edges formed at the intersection of the major side surfaces with an end surface;
a major plane P2 located between the major side surfaces and perpendicular to the median plane M;
a minor plane P1 located between the minor side surfaces and perpendicular to both the median plane M and the major plane P2;
wherein:
each end surface comprises first and second abutment surfaces that:
(a) are located on opposite sides of the minor plane P1, and (b) are spaced apart from one another;
the first abutment surface comprises a first abutment region that is on a first side of the major plane P2;
the second abutment surface comprises a second abutment region that is also on the first side of the major plane P2;
neither of the first and second abutment regions protrudes relative to the surrounding end surface;
and
in each cross section of the cutting insert taken in a plane parallel to the minor plane P1, each end surface has a smoothly varying profile.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/460,730Filed 28 Jul 2006 · continuation
Priority: 2 Sep 2004
Published: US 2006/0045636 A116 Nov 2006
Granted: 24 Jul 2007
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B23C 5/2213
For plate-like cutting inserts: having a special shape
B23C 5/06
Characterised by the shape of the cutter: face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
B23C 2200/0472
Overall shape: trapezium
B23C 2200/085
Rake or top surfaces: discontinuous

Family

Application10/932,293Parent of this continuation · filed 2 Sep 2004
US 2006/0257214 A1Pre-grant publication · published 16 Nov 2006
US 7,104,735 B2Parent of this continuation
US 2006/0045636 A1Published application
US 7,246,973 B2This patent

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