US 5,332,338 AGranted

Exchangeable hard metal cutting inserts in milling cutter

AssigneeIscar, Ltd.

InventorsAmir Satran, Moshe Rudko

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Abstract

A cutting insert for a rotary milling cutter tool is described. The insert has a cutting edge defined between a cutting rake surface and a relief flank. The insert also has a base edge defined between the relief flank and a base surface. The cutting edge of the insert includes first and second successive component cutting edges which merge continuously with each other. The first and second component cutting edges have respective axial rake angles .gamma..sub.1 and .gamma..sub.2 with respect to an axis of rotation of the cutting tool, with .gamma..sub.1 being significantly greater than .gamma..sub.2. The relief flank and the component cutting edges are shaped and disposed so that the intersection of a plane passing through the rotational axis of the milling cutting tool with a surface milled by the cutting edge is substantially rectilinear.

Claims10

Dependent claims

A cutting insert in a rotary milling cutter tool and having a cutting edge defined between a cutting rake surface and a relief flank and having a base edge defined between said relief flank and a base surface wherein said cutting edge comprises first and second successive component cutting edges which merge continuously with each other;

said first and second component cutting edges having respective axial rake angles .gamma..sub.1 and .gamma..sub.2 with respect to an axis of rotation of the cutting tool wherein .gamma..sub.1 is significantly greater than .gamma..sub.2 ;
.gamma..sub.1 lies substantially within the range 4.degree.-30.degree. and .gamma..sub.2 lies substantially within the range .+-.15.degree.;
wherein said cutting edge projects a length a with respect to the axis of rotation, whilst the first component cutting edge projects a length a.sub.1 with respect to the axis of rotation wherein a.sub.1 lies within the range 0.6-0.9a and wherein said relief flank and the component cutting edges are so shaped and disposed that the intersection of a plane passing through the rotational axis of the milling cutter tool with a surface milled by said cutting edge is substantially rectilinear.

Dependencies are inferred from the claim text.