Patent ID: 8974156
Filing Date: 2015-03-10
Classification: B23C,Y10T

Abstract:
1. A cutting insert, comprising: a cutting insert body having a top surface, a base surface, and lateral flanks connecting said top surface and said base surface to one another; cutting edges, said cutting edges being convex in a plan view and being formed by an intersection between said top surface and said lateral flanks and/or by an intersection between said base surface and said lateral flanks; said cutting edges extending between respective cutting corners each having a corner radius Re; each said cutting edge, starting adjacent a cutting corner, having a straight wiper edge, followed by a circular section, and merging into a main cutting edge having at least one straight section; a cutting edge chamfer extending around an entire said cutting insert body and having a chamfer angle α with a substantially constant first value in a region around said cutting corners, said first value being within a range of −10° to −20° ; said chamfer angle α changing continuously from said first value to a second value in regions adjacent said cutting corner on both side along a segment of said wiper edge or of said main cutting edge, respectively; said second value being substantially constant along the remaining sections of said wiper edge and said main cutting edge and along said circular section, said second value lying within of 0° to −10 °.