| 摘要 |
A three-sided indexable, detachable insert having a positive rake for a cutting tool. The insert has three edge faces and two side faces, each edge face having one or more recesses which extend across the whole of the edge face, substantially transversely to the cutting edge formed where each edge face meets one of the side faces of the insert. The recesses are spaced apart from a plurality of coplanar lands, the number of recesses on each edge face being the same. The width of the recesses is the same as half the width or less than half the width of the intervening lands. Each intervening land is positioned such that is provides in operation a cutting edge to wipe the material left by the recesses of any of the other sides. Each edge face and cutting edge of the triangular insert having a positive rake is designed to have recesses and lands in positions such that when two or more of the inserts are placed side by side, the lands of one or more inserts are in complementary registry with the recesses in at least one other insert. This presents a continuous but staggered line of cutting edge lands when the inserts are positioned in a milling cutter. |
