Importance

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Abstract

The invention is directed towards cutting inserts having a top surface, a bottom surface, at least three side surfaces extending from the top surface to the bottom surface, and a nose corner connecting two adjacent side surfaces. The intersection of the cutting insert may include an intersection of the nose corner and the top surface wherein at least a portion of the intersection defined by a multi-segment spline curve. The multi-segment spline curve may be a B-spline curve. The intersection may also be defined by two arcs at each end of the B-spline curve. The invention also includes a method of designing a turning insert having the steps of designing a nose corner with multi-segment spline curve. The multi-segment spline curve may be a B-spline curve. The method may be a computer implemented method of designing a turning insert having the steps of determining the shape and size of the desired turning insert, determining the desired contact mode between the turning insert and the machining surface at a specific lead angle, and developing a B-spline curve that is smoothly and tangentially connected to the two arcs symmetrical to the bisector line of nose corner.

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First Claim