US 10,058,938 B2Granted

Cutting insert, cutting tool, and method of producing machined product

AssigneeKYOCERA Corporation

InventorMasahiro Yamamoto

Life of this patent

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Abstract

A cutting insert includes an upper surface, a lower surface, a side surface, and an upper cutting edge. The upper cutting edge includes a major cutting edge having an outwardly projecting curvilinear shape, and a minor cutting edge having a straight line shape and being continuous with the major cutting edge. The side surface includes a continuous inclined surface with the major cutting edge and is inclined outward from the upper surface to the lower surface with respect to a virtual straight line connecting the respective centers of the upper and lower surfaces. An inclination angle of the inclined surface with respect to a virtual straight line on the side surface increases from a portion of the inclined surface which is continuous with an end portion of the major cutting edge to a portion of the inclined surface which is continuous with a center of the major cutting edge.

Claims17

Dependent claims

A cutting insert, comprising:

a first surface;
a second surface;
and
a third surface connected to each of the first surface and the second surface;
wherein a first intersection of the first surface and the third surface comprises a first part having an outwardly projecting curvilinear shape, and a second part having a straight line shape and being continuous with the first part,
wherein the third surface comprises a first inclined surface that is continuous with the first part and is inclined further outward as going from the first surface to the second surface with respect to a virtual straight line connecting a center of the first surface and a center of the second surface, and
wherein an inclination angle of a portion of the first inclined surface, which is continuous with a center of the first part, with respect to the virtual straight line is larger than an inclination angle of a portion of the first inclined surface, which is continuous with an end portion of the first part, with respect to the virtual straight line.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/374,096Filed 9 Dec 2016 · continuation
Priority: JP 2012-12319230 May 2012
Published: US 2017/0189975 A16 Jul 2017
Granted: 28 Aug 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

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 5/202
With removable cutter bits or teeth or cutting inserts: plate-like cutting inserts with special form
B23C 2200/045
Overall shape: round
B23C 2200/125
Side or flank surfaces: discontinuous

Family

PCT/JP2013/064871Parent of this continuation · filed 29 May 2013
US 2017/0189975 A1Pre-grant publication · published 6 Jul 2017
Application14/401,949Parent of this continuation
US 9,550,239 B2Parent of this continuation
US 2015/0165532 A1Published application
US 10,058,938 B2This patent

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