Seco Tools Ab

Thomas Norström

Bertrand Riviere

Mats Jonsson

Francois Auzenat

Bertrand Rivière

François Auzenat

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.

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

A double-sided indexable cutting insert includes a top side and a bottom side interconnected by an edge surface. A plurality of upper major cutting edges are formed at a transition between the top side and the edge surface, and a plurality of lower major cutting edges are formed at a transition between the bottom side and the edge surface. Adjacently situated major cutting edges at each of the top and bottom sides are interconnected by corner cutting edges disposed along respective corners of the insert. Each corner cutting edge includes a minor cutting edge and a nose cutting edge. The nose cutting edge extends to the respective minor cutting edge from a respective major cutting edge. A portion of the edge surface disposed to one side of a bisector of each corner extends from a nose cutting edge of the top side towards a minor cutting edge on the bottom side and forms a downwardly facing step substantially midway between the top and bottom sides. A portion of the edge surface disposed to the other side of the bisector of the same corner extending from a nose cutting edge of the bottom side towards a minor cutting edge of the top side and forming an upwardly facing step substantially midway between the top and bottom sides.

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Fagersta, Sweden

Thomas Norström