Cutting insert with evolutive wedge or clearance angle and toolholder using such a cutting insert

摘要

A circular cutting insert (21) includes a top surface (23) including a top edge portion (25), a side surface (27) including a clearance surface (29) and a clearance edge portion (31), and a cutting edge (33) between the clearance edge portion (31) and the top edge portion (25). The clearance edge portion (31) and the top edge portion (25) form a wedge angle (WA). The wedge angle (WA) varies as a function of circumferential position about a central axis (X) of the insert (21) relative to a point (0) on the cutting edge (33).