Patent ID: 6244791
Filing Date: 2001-06-12
Classification: B23B,Y10T

Abstract:
An indexable insert for metal cutting comprising:an upper surface,a bottom surface,side surfaces joining said upper and bottom surfaces,a plurality of intersecting lines between the side surfaces and the upper surface,at least a portion of the intersecting lines between the side surfaces and the upper surface generating:at least one main cutting edge,a secondary cutting edge,corner portions of the upper surface being provided with a recess, anda corner cutting edge, said corner cutting edge having a bisector,wherein said corner cutting edge includes at least two corner radiused edges having different radii, such that a variation of the radii around said bisector of the corner cutting edge of the insert is asymmetrical and that a first of the radiused edges has a larger radius and is located adjacent to the main cutting edge and a second of the radiused edges has a smaller radius and is located adjacent to the secondary cutting edge, and the secondary cutting edge includes a radiused edge with a radius that is larger than said two corner radiused edges, and each of said recesses includes a rear plane being so arranged that the chips generated by said cutting edges hit said rear plane and break against said rear plane.