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US 5,628,590 AGranted
Ceramic cutting tool with chip control
AssigneeKennametal Inc.
InventorsCraig W. Beeghly, Deepak P. Ahuja, Pankaj K. Mehrotra, Kenneth L. Niebauer
Life of this patent
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Abstract
A ceramic cutting insert for high speed machining of materials is provided having an integral chip control surface thereon,
Claims65
A ceramic cutting insert comprising:
- a rake face having an integral as molded means for providing chip control;
- a flank face;
- a cutting edge at the junction of said rake face and said flank face;
- wherein the included angle respectively formed by said rake face and said flank surface at the cutting edge is less than 90 degrees;
- and wherein said ceramic has a room temperature, fracture toughness (K.sub.IC) of at least 4 MPam.sup.1/2 to less than 5 MPam.sup.1/2.
2 more elements
An indexable ceramic cutting insert comprising:
- a top rake face;
- a bottom take face;
- a flank face joining said top rake face and said bottom rake face;
- a first cutting edge formed at the juncture of said top rake face and said flank face;
- a second cutting edge formed at the juncture of said bottom rake face and said flank face;
- a first as molded chip control groove surface or structure in said top rake face;
- a second as molded chip control groove surface or structure in said bottom rake face;
- and wherein said ceramic has a room temperature fracture toughness (K.sub.IC) of at least 4 MPam.sup.1/2 to less than 5 MPam.sup.1/2.
5 more elements
A ceramic cutting insert for high speed machining of materials comprising:
- a flank face;
- a rake face;
- a cutting edge at the Juncture of said flank and said rake faces;
- wherein said rake face includes an as molded means for controlling chip forming, during said high speed machining of materials;
- said insert having a ceramic composition characterized by a room temperature fracture toughness (K.sub.IC) of at least 4 MPam.sup.1/2 to less than 5 MPam.sup.1/2.
2 more elements
An indexable ceramic cutting insert comprising:
- a first cutting edge extending in a first direction;
- a second cutting edge extending in a second direction and joined to said first cutting edge at a corner of the insert;
- a rake face with an integral means for controlling chip formation extending along said first cutting edge, said second cutting edge and said comer of said insert;
- wherein said first cuffing edge, and said second cutting edge define a plane;
- a surface of said means for controlling chip formation extending below said plane, and said surface is in an as-molded condition;
- and wherein said indexable;
- ceramic cutting insert is composed of a ceramic composition having a room temperature fracture toughness (K.sub.IC) of at least 4 Mpam.sup.1/2 to less than 5 MPam.sup.1/2.
4 more elements
Dependencies are inferred from the claim text.