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

摘要

A circular cutting insert includes a top surface having a top edge portion, a side surface having a clearance surface and a clearance edge portion. A cutting edge is formed between the clearance edge portion and the top edge portion. The clearance edge portion and the top edge portion form a wedge angle. The wedge angle varies as a function of circumferential position about a central axis of the insert relative to a point on the cutting edge.

主权项

1. An indexable circular cutting insert comprising:
a top surface including a land surface adjacent to a top edge portion; a side surface including a clearance surface and a clearance edge portion, the clearance edge portion forming a clearance angle with a central axis of the insert; a cutting edge defined by an intersection of the clearance edge portion and the land surface, wherein the clearance edge portion and the top edge portion form a wedge angle such that the wedge angle varies as a function of circumferential position about the central axis of the insert relative to a point on the cutting edge, the cutting insert being indexable to a plurality of different indexing positions, and wherein the wedge angle varies between a maximum and a minimum value as a function of circumferential position about the central axis of the insert relative to the point on the cutting edge corresponding to each indexing position and the clearance angle varies as a function of circumferential position about the central axis of the insert relative to the point on the cutting edge.