Abstract: A cutting insert for metal cutting includes a body portion of a generally polygonal shape having a cutting end including a front end wall, sides, and top and bottom surfaces. The intersection of the top surface, end wall and sides forming a cutting edge. The top surface includes a cutting land sloping downwardly and inwardly from the cutting edge, a chipgroove area adjoining the cutting land and extending inwardly therefrom and disposed at a lower elevation than the cutting edge, and an upsloping chipbreaker portion adjoining the chipgroove area and the cutting land and leading to a plateau disposed at a higher elevation than the cutting edge and chipgroove area. The chipbreaker portion is configured symmetrically about a line bisecting the top surface between the sides and includes a forwardly extending fingerlike projection on either side of and continuous with a rearwardly recessed region bisected by the line.

Abstract: A chip control insert is disclosed having positive, concave radiused chip breaker entry surfaces, and a locating surface which is equipped with a planar sealing surface and inclined, convex, radiused chip breaker ramp surfaces which undulate along the length of the insert. The intersection of the back ramp surface and the entry surface defines a chip groove. The locating surface has radial nose projections and radius bulges intermediate the length of the polygon sides of the insert.

Abstract: An indexable cutting insert having a polygonal body including top and bottom surfaces connected by a peripheral wall having sides and corners. In a generally diamond shaped embodiment, opposite corners and the adjacent sides form cutting edges at their junctures with the top surface, forming noses at the corners. A chip groove formed on the top surface includes a pair of cutting faces, sloping downwardly from respective sides to a radius blend juncture aligned with the nose and bisecting the adjacent sides. A pair of chipbreaker faces slope upward from respective ones of the cutting faces and backward from a ridge that connects the chipbreaker faces and is upwardly aligned with the juncture of the cutting faces. The chipbreaker faces preferably have a double curvature (1) outward from the ridge and (2) upward from radius blend junctures with their adjoining cutting faces.

Abstract: A cutting insert for metal cutting includes a body portion of a generally polygonal shape having a cutting end including a front end wall, sides, and top and bottom surfaces. The intersection of the top surface, end wall and sides forming a cutting edge. The top surface includes a cutting land of a generally concave shape about an axis longitudinally extending between the sides and sloping downwardly and inwardly from the cutting edge, a chipgroove area adjoining the cutting land and extending inwardly therefrom and disposed at a lower elevation than the cutting edge, and an upsloping chipbreaker portion adjoining the chipgroove area and the cutting land and leading to a plateau disposed at a higher elevation than the cutting edge and chipgroove area. The chipbreaker portion is configured symmetrically about the axis and includes a forwardly extending fingerlike projection on either side of and continuous with a rearwardly recessed region bisected by the axis.

Abstract: A polygonal indexable cutting insert with improved chip control design having a radiused chip groove and discontinuous chip breaker pads for fine finishing in turning and boring operations.

Abstract: A flat disk-like tool insert has a plurality of arcuate cutter tips for machining the side surface of a rotating work piece, and a plurality of linear cutting edges for machining a chamfer on the end of the work piece. An endless land surface is contiguous with the cutter tips and the linear cutting edges so as to deflect metal chips away from the machined surfaces. Each tool tip is aligned with two chip breaker ledges that are arranged in a step configuration, such that chips of varying thickness can be effectively and cleanly broken without interference with the machining process. A third chip breaker ledge is set back from each linear cutting edge for breaking chips generated during a chamfering operation.

Abstract: A polygonal lay down indexable cutting insert for boring, finish turning and backfacing. The insert has a positive land surface and particularly useful at moderate to high cutting speeds and at low range of feed rates and depths of cut.

Abstract: A polygonal lay down indexable cutting insert for a centrally located island and light feed and light depth of cut applications. The insert has a variable land surface angle which is 14.degree. at each corner of the insert and merges into a 12.degree. as measured along the flanks of the insert. A second descending angle is 27.degree. along the flanks. The corners are radiused along the variable land surface and the descending angle surfaces to impart better strength and cutting for the insert. Moreover, the first variable descending angle is greater than the first variable descending angle along the flanks of the insert.

Abstract: A polygonal, lay down indexable cutting insert for eight feed and light depth of cut application. The insert has intermittent seating pads, chipbreaker pads, and stabilizer pads and is configured to allow coolant to be circulated across the body of the insert during cutting operations.

Abstract: An indexable improved force distribution cutting insert having a tapered cutting edge along its periphery with the greatest height at each corner of the insert and descending bi-directionally toward the centerline of the insert to define a resultant ridge to improve impact resistance at each corner.

Abstract: An indexable improved force distribution cutting insert having an arcuate concave convex cutting edge and a body portion having an arcuate concave convex configuration corresponding to the cutting edge.

Abstract: A high depth, low force, polygonal throw away indexable cutting insert to turn ductile materials like steel at low to high cutting speeds and medium to high ranges of feed and depth of cut.

Abstract: An indexable cutting insert of the type having a corner radius and a corner angle adapted for finishing operations comprises a pair of substantially parallel spaced apart faces and at least one peripheral side surface being substantially normal to said faces. A pair of straight cutting edge extend away from the corner at the juncture of the peripheral side surface and a plane positioned closely adjacent and below the juncture of a respective face. To break the chips formed during cutting, a chip breaker recess extents rearwardly and along the cutting edges. The chip breaker recess includes a descending control surface leading to the bottom of the recess followed by an ascending control surface. The descending control surface comprises a first and second planar descending control surface with the first surface being at a shallow angle and the second surface being at a steep angle.

Abstract: In a ceramic indexable cutting insert, an edge strengthening land extends rearwardly of a beveled cutting edge at an angle of from about 80 to about 100 degrees with respect to the peripheral side surface, and a grooved recess extents rearwardly and along the edge strengthening land to direct chips upwardly and outwardly away from the insert and the cutting edge. In one embodiment of the present invention intended for conditions of heavy depth of cut, enhanced edge strength is sacrificed and an edge strengthened land is not provided.