| 摘要 |
An indexable cutting insert for chip removal machining, the insert having a polygonal body having opposed lower and upper faces that are mutually interconnected by peripheral faces meeting at rounded corners, which are formed symmetrically with respect to upper face bisectors. The upper face includes a mid portion, which is positioned inside of a chip face. Intersections of the chip face and the peripheral face forming major cutting edges and corner cutting edges. The chip face comprises a row of protrusions. A pair of oblong corner protrusions are provided at each corner area of the chip face. The pair is located symmetrically with respect to an associated bisector of the upper face. Each oblong corner protrusion has a longitudinal axis and at least two peak areas. The peak areas are positioned in line, essentially on the longitudinal axis of each oblong corner protrusion.
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