Patent ID: 9545671
Date: 2017-01-17
CPC Classifications: B23B,Y10T

Claim:
1. A polygonal indexable cutting insert, comprising: a pair of faces and a plurality of peripheral side surfaces normal to said parallel faces, said faces and said side surfaces being joined to form rounded corners, each face having a rake face and a central plateau; a plurality of cutting edges formed at intersections between said faces and said plurality of side surfaces; wherein each said rake face slopes inwardly and downwardly from said cutting edges, via a single slope dimension; and a plurality of chip breaking scallops positioned along said cutting edges, each said scallop comprising: wherein said central plateau of each face includes a triangular-shaped area proximate said rounded corners, each triangular-shaped area including an apex that lies along a bisector passing through a central axis and opposite rounded corners, each triangular-shaped area also including a pair of side walls; and wherein a distance from each side wall of each of said triangular-shaped areas to a nearest cutting edge continuously increases from said apex; each said side wall of each of said triangular-shaped areas terminating in a trough; each said trough comprising a wall portion extending from a point furthest from a nearest cutting edge to a point intersecting said back wall of an adjacent scallop; said point, at which said wall portion of each said trough intersects said back wall of an adjacent scallop, being disposed at a first distance from the nearest cutting edge; said back wall of said adjacent scallop intersecting said back wall of another, adjoining scallop; wherein a point at which said back wall of said adjacent scallop intersects said back wall of said other, adjoining scallop is located at a second distance from the nearest cutting edge; said first distance being greater than or equal to said second distance.