US 10,300,538 B2Granted

Milling insert

AssigneeSandvik Intellectual Property AB

InventorsAmil Oprasic, Leif Widin, Stefan Roman, Lennart Wihlborg

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Abstract

A milling insert, including an upperside, an underside, and a reference plane parallel thereto. A plurality of indexable cutting edges are formed along a peripheral borderline in transitions between at least the upperside and a number of clearance surfaces. Each cutting edge includes a chip-removing main edge and a surface-wiping secondary edge. The main edge, from a first end of the main edge adjacent to the secondary edge, first declines toward the underside of the milling insert and then, from a lowest part, rises toward an opposite second end of the main edge. The secondary edge is inclined at an angle (ε) in relation to the reference plane as viewed perpendicularly to the clearance surface of the secondary edge, such that a first end of the secondary edge connected to the main edge is situated on a lower level than the opposite, second end of the secondary edge.

Claims26

Dependent claims

A face milling insert, comprising:

an upperside, an underside, and a reference plane parallel to the upperside and the underside;
a plurality of indexable cutting edges formed along a peripheral borderline in transitions between at least the upperside and a number of clearance surfaces;
each indexable cutting edge including a chip-removing main edge and a cooperating surface-wiping secondary edge, the cooperating surface-wiping secondary edge forming an obtuse angle with the main edge as viewed in plan view of the upperside;
and
the main edge, from a first end of the main edge adjacent to the cooperating surface-wiping secondary edge, first declining toward the underside of the milling insert and then, from a lowest part, rising toward an opposite second end of the main edge, wherein the cooperating surface-wiping secondary edge is inclined at an angle (ε) in relation to the reference plane as viewed perpendicularly to the clearance surface of the cooperating surface-wiping secondary edge, such that a first end of the cooperating surface-wiping secondary edge connected to the main edge is situated on a lower level than the opposite, second end of the cooperating surface-wiping secondary edge, and the first end of the cooperating surface-wiping secondary edge is closer to the main edge than the second end of the cooperating surface-wiping secondary edge.

2 more elements

A face milling insert, comprising:

a body having an upperside and an underside, the upperside opposite to the underside and separated therefrom by a plurality of clearance surfaces and a reference plane that is perpendicular to the plurality of clearance surfaces;
and
a plurality of indexable cutting edges, each formed along a peripheral borderline at a transition between one of the plurality of clearance surfaces and at least one of the upperside or the underside,
wherein each indexable cutting edge includes
a main edge to remove chips formed during milling of a workpiece, and
a cooperating secondary edge to wipe the surface of the workpiece during milling, the cooperating secondary edge cooperating with the main edge during milling, and each cooperating secondary edge forming an obtuse angle with the main edge as viewed in plan view of the at least one upperside or underside,
wherein each main edge extends from a first end adjacent to the cooperating secondary edge to a second end,
wherein, in a direction along the main edge from the first end toward a point closest to the reference plane, each main edge is angled toward the reference plane,
wherein, in a direction along the main edge from the point closest to the reference plane toward the second end, each main edge is angled away from the reference plane,
wherein the cooperating secondary edge extends from a first end adjacent to the main edge to a second end,
wherein the first end of the cooperating secondary edge is closer to the main edge than the second end of the cooperating secondary edge, and
wherein, in a direction along the cooperating secondary edge from the second end of the cooperating secondary edge to the first end of the cooperating secondary edge, the cooperating secondary edge is inclined toward the reference plane at an angle ε.

9 more elements

A face milling insert, comprising:

a body having an upperside and an underside, the upperside opposite to the underside and separated therefrom by a plurality of clearance surfaces and a reference plane that is perpendicular to the plurality of clearance surfaces;
and
a plurality of indexable cutting edges, each formed along a peripheral borderline at a transition between one of the plurality of clearance surfaces and at least one of the upperside or the underside,
wherein each indexable cutting edge includes
a main edge to remove chips formed during milling of a workpiece, and
a cooperating secondary edge to wipe the surface of the workpiece during milling, the cooperating secondary edge cooperating with the main edge during milling, and each cooperating secondary edge forming an obtuse angle with the main edge as viewed in plan view of the at least one upperside or underside;
and
an inactive edge corresponding to each main edge, the inactive edge separating the main edge from a neighboring, non-cooperating secondary edge,
wherein each main edge extends from a first end adjacent to the cooperating secondary edge to a second end, in a direction along the main edge from the first end toward the second end, the main edge including
a part adjacent to the cooperating secondary edge, which is angled toward the reference plane at an angle γ until a transition point,
a part adjacent to the transition point,
a part between the part adjacent to the transition point and a lowest point of the main edge with respect to the reference plane, which is angled toward the reference plane at an angle less than γ, and
a part between the lowest point and the inactive edge, which is angled away from the reference plane,
wherein the transition point is closer to the cooperating secondary edge than to the second end of the main edge,
wherein the cooperating secondary edge extends from a first end adjacent to the main edge to a second end,
wherein the first end of the cooperating secondary edge is closer to the main edge than the second end of the cooperating secondary edge, and
wherein, in a direction along the cooperating secondary edge from the second end of the cooperating secondary edge to the first end of the cooperating secondary edge, the cooperating secondary edge is inclined toward the reference plane at an angle ε.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/350,994Filed 14 Nov 2016 · continuation
Priority: SE 080107513 May 2008
Published: US 2017/0056986 A12 Mar 2017
Granted: 28 May 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B23C 5/202
With removable cutter bits or teeth or cutting inserts: plate-like cutting inserts with special form
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 5/20
Characterised by physical features other than shape: with removable cutter bits or teeth or cutting inserts
B23C 2200/0422
Overall shape: octagonal

Family

Application12/420,492Parent of this continuation · filed 8 Apr 2009
US 2017/0056986 A1Pre-grant publication · published 2 Mar 2017
US 9,555,488 B2Parent of this continuation
US 2009/0285646 A1Published application
US 10,300,538 B2This patent

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