Patent ID: 7021871
Filing Date: 2006-04-04
Classification: B23C,Y10T

Abstract:
1. Indexable milling insert having a generally polygonal shape and a generally positive cutting geometry, comprising a top side, a bottom side, and a peripheral side structure; the peripheral side structure including a first pair of mutually opposite peripheral sides and a second pair of mutually opposite peripheral sides intersecting the first pair to define two acute-angled corners and two obtuse-angled corners of the insert; two cutting edges each formed at a junction between the top side and a respective peripheral side; each cutting edge including a major portion extending along a respective peripheral side, and a minor portion joined to the major portion and extending along a respective acute-angled corner; at least part of the each major portion being convexly arc-shaped as viewed in a direction perpendicular to the top side; the bottom side defining a connecting surface adapted to connect the insert to a support; the connecting surface including a plurality of parallel ridges alternating with parallel grooves, the grooves having a cross-sectional shape widening in a direction away from the top side; the top side defining a chip face; each of the cutting edges extending along a border portion of the chip face which transforms into a valley portion of the chip face; the valley portion extending to a raised portion of the chip face disposed substantially centrally in the top side.