US 5,549,424 A · Indexable threading and turning insert with pressed-in chip breakers

Abstract

An indexable threading and turning insert with integral press-in chip breakers, having a threading insert portion and a turning insert portion. Each of the threading insert portion and the turning insert portion has, respectively, an integral pressed-in chip breaker having ideal chip management characteristics. The indexable threading and turning insert has a substantially diamond shape having a first planar face, an opposite second planar face, and four insert faces extending between the first and second planar faces. The threading insert portion is characterized by a first cutting edge formed at the intersection of the first insert face and a first land and a second cutting edge formed at the intersection of the second insert face and a second land. The first and second cutting edges have a plurality of noses separated by gullets. First and second integral, pressed-in chip breakers, each in the form of a raised island, the incident face contour thereof corresponding to the nose-and-gullet contour of the respective cutting edge adjacent thereto. The turning insert portion is characterized by third and fourth cutting edges located, respectively, at the intersection of a third land with the third and fourth insert faces, and at the intersection of a fourth land with the third and fourth insert faces. Third and fourth integral, pressed-in chip breakers, each in the form of a raised island corresponding to the contour of the respective cutting edge adjacent thereto.

Claims22

Dependent claims

An indexable threading and turning insert for selectively providing threading and turning of a workpiece, comprising:

an insert body having a first side and an opposite second side, said insert body having a first corner and an opposite second corner, said insert body having a first insert face and a second insert face mutually adjoining said first corner, and a third insert face and a fourth insert face mutually adjoining said second corner;
a first cutting edge formed at an intersection of said first insert face and said first insert side;
a second cutting edge formed at an intersection of said second insert face and said second insert side;
a third cutting edge formed at an intersection of said third insert face and said first side;
a fourth cutting edge formed at an intersection of said fourth insert face and said second side;
and
wherein said first cutting edge and said first insert face provide a contour for providing a first thread form on a workpiece, said second cutting edge and said second insert face provide a contour for providing a second thread form on a workpiece, and said third cutting edge and said fourth cutting edge provide a turning edge for material removal on a workpiece.

4 more elements

An indexable threading insert with pressed-in chip breakers for providing thread forms on a workpiece, comprising:

an insert body having a first side and an opposite second side, said insert body further having a first corner, a second corner opposite said first corner, a third corner and a fourth corner opposite said third corner, said insert body having a first insert face and a second insert face which mutually adjoin said first corner, said insert body having a third insert face and a fourth insert face which mutually adjoin said second corner, a first cutting edge being formed at an intersection of said first insert face and said first side, a second cutting edge being formed at an intersection of said second insert face and said second side, said first cutting edge and said first face being provided with a predetermined contour for providing a predetermined thread form on a workpiece, said second cutting edge and said second insert face having said predetermined contour;
a first chip breaker integrally connected with said first side of said insert body, said first chip breaker comprising a first raised island comprising:
a first incident face having said predetermined contour, said first incident face being recessed a predetermined distance from said first cutting edge;
and
a first planar face contiguously adjoining said first incident face, said first incident face being oriented at a predetermined incident angle with respect to said first planar face;
and
a second chip breaker integrally connected with said second side of said insert body, said second chip breaker comprising a second raised island comprising:
a second incident face having said predetermined contour, said second incident face being recessed said predetermined distance from said second cutting edge;
and
a second planar face contiguously adjoining said second incident face, said second incident face being oriented with respect to said second planar face at said predetermined incident angle, said first planar face being parallel with respect to said second planar face;
wherein said insert body, said first chip breaker and said second chip breaker are collectively inversely symmetrical with respect to a diagonal between said first and second corners;
wherein said predetermined contour of said first and second cutting edges and said first and second insert faces comprises a plurality of noses, each nose of said plurality of noses being separated from each other by a gullet;
and
wherein said predetermined contour on said first and second incident faces comprises a scalloped portion respectively adjacent to and facing toward each said nose of said plurality of noses.

11 more elements

An indexable threading and turning insert with pressed-in chip breakers for selectively providing threading and turning of a workpiece, comprising:

an insert body having a first side and an opposite second side, said insert body further having a first corner, a second corner opposite said first corner, a third corner and a fourth corner opposite said third corner, said insert body having a first insert face and a second insert face which mutually adjoin said first corner, said insert body having a third insert face and a fourth insert face which mutually adjoin said second corner, a first cutting edge being formed at an intersection of said first insert face and said first side, a second cutting edge being formed at an intersection of said second insert face and said second side, said first cutting edge and said first face being provided with a first predetermined contour for providing a predetermined thread form on a workpiece, said second cutting edge and said second insert face having said first predetermined contour, a third cutting edge being formed at an intersection of said third insert face and said first side, and a fourth cutting edge being formed at an intersection of said fourth insert face and said second side;
first chip breaker means integrally connected with said first side of said insert body for providing workpiece chip control adjacent said first cutting edge;
second chip breaker means integrally connected with said second side of said insert body for providing workpiece chip control adjacent said second cutting edge;
third chip breaker means integrally connected with said first side of said insert body for providing workpiece chip control adjacent said third cutting edge;
and
fourth chip breaker means integrally connected with said second side of said insert body for providing workpiece chip control adjacent said fourth cutting edge;
wherein said first corner, said first face, said first cutting edge, said second face, said second cutting edge, said first chip breaker means and said second chip breaker means collectively comprise a threading insert portion for providing a thread form on a workpiece;
and wherein said third corner, said third cutting edge, said fourth face, said fourth cutting edge, said third chip breaker means and said fourth chip breaker means collectively comprise a turning insert portion for providing turning of a workpiece.

5 more elements

An indexable threading and turning insert with pressed-in chip breakers and a toolholder therefor for selectively providing threading and turning of a workpiece, comprising:

a toolholder having a toolholder axis, said toolholder having a forward end, said forward end having a pocket formed therein, said pocket being negatively angled with respect to said toolholder axis at a predetermined pocket angle;
an indexable threading and turning insert with pressed-in chip breakers receivable in said pocket, comprising:
an insert body having a first side and an opposite second side, said insert body further having a first corner, a second corner opposite said first corner, a third corner and a fourth corner opposite said third corner, said insert body having a first insert face and a second insert face which mutually adjoin said first corner, said insert body having a third insert face and a fourth insert face which mutually adjoin said second corner, a first cutting edge being formed at an intersection of said first insert face and said first side, a second cutting edge being formed at an intersection of said second insert face and said second side, said first cutting edge and said first face being provided with a first predetermined contour for providing a predetermined thread form on a workpiece, said second cutting edge and said second insert face having said first predetermined contour, a third cutting edge being formed at an intersection of said third insert face and said first side, and a fourth cutting edge being formed at an intersection of said fourth insert face and said second side;
first chip breaker means integrally connected with said first side of said insert body for providing workpiece chip control adjacent said first cutting edge;
second chip breaker means integrally connected with said second side of said insert body for providing workpiece chip control adjacent said second cutting edge;
third chip breaker means integrally connected with said first side of said insert body for providing workpiece chip control adjacent said third cutting edge;
and
fourth chip breaker means integrally connected with said second side of said insert body for providing workpiece chip control adjacent said fourth cutting edge;
wherein said first corner, said first face, said first cutting edge, said second face, said second cutting edge, said first chip breaker means and said second chip breaker means collectively comprise a threading insert portion for providing a thread form on a workpiece;
and wherein said third corner, said third cutting edge, said fourth face, said fourth cutting edge, said third chip breaker means and said fourth chip breaker means collectively comprise a turning insert portion for providing turning of a workpiece;
and
means for releasably affixing said indexable threading and turning insert within said pocket so that one of said first, second, third and fourth cutting edges projects therefrom to thereby provide an active cutting edge.

9 more elements

Dependencies are inferred from the claim text.

Indexable threading and turning insert with pressed-in chip breakers

Life of this patent

Indexable threading and turning insert with pressed-in chip breakers

Life of this patent

Abstract

Claims22