| 摘要 |
PCT No. PCT/US95/08669 Sec. 371 Date Feb. 21, 1997 Sec. 102(e) Date Feb. 21, 1997 PCT Filed Jul. 12, 1995 PCT Pub. No. WO96/05009 PCT Pub. Date Feb. 22, 1996The indexable insert possesses two parallel cutting edges on opposite sides of an indexable insert body in the form of a rectangular block. In the intermediately placed top surface descending toward the center line (M) there is a chipbreaking structure comprising alternating projections and recesses. These projections and recesses constitute a row, centered on the center line (M), of spherical-like chipbreaking bodies, between which concave chip guiding surfaces are formed. During metalcutting operations, this provides an even flow of chips with the formation of short chips which are free of grooves and tears along the edges.
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