Patent ID: 6684752
Filing Date: 2004-02-03
Classification: B23C,Y10T

Abstract:
An indexable cutting insert for use in a milling cutter comprising:generally square shaped top and bottom surfaces; four substantially identical side surfaces extending between the top surface and the bottom surface; two diametrically opposite protuberances extending away from each other in a top or bottom view of the cutting insert, each protuberance having a peripheral side surface comprising an intermediate side surface and two minor side surfaces, the intermediate side surface being located between and merging with the two minor side surfaces, each side surface comprising a major side surface connected to an adjacent minor side surface, adjacent major side surfaces merging at two diametrically opposite corner edges of the cutting insert; eight identical major cutting edges, comprising four major cutting edges formed at the intersection of the major side surfaces with the top surface and four major cutting edges formed at the intersection of the major side surfaces with the bottom surface; and eight identical minor cutting edges, comprising four minor cutting edges formed at the intersection of the minor side surfaces with the top surface and four minor cutting edges formed at the intersection of the minor side surfaces with the bottom surface, each minor cutting edge being connected to an adjacent major cutting edge; wherein each minor cutting edge forms an external obtuse angle (&agr;) with its adjacent major cutting edge, in a top or bottom view of the cutting insert.