| 摘要 |
A high-speed milling cutter ( 10 ) includes a shank ( 12 ), a front portion ( 14 ), and a transition surface ( 16 ) between the shank ( 12 ) and the front portion ( 14 ). The cutter ( 10 ) also includes an insert pocket ( 20 ) having a bottom surface ( 22 ) and side surfaces ( 24, 26 ). The bottom surface ( 22 ) includes a raised boss ( 28 ) for supporting a cutting insert ( 30 ). The cutting insert ( 30 ) has a top surface ( 32 ), a bottom surface ( 34 ) and side surfaces ( 36, 38, 40, 42 ). The cutting insert ( 30 ) includes a primary cutting edge ( 44, 46 ) formed at an intersection between the top surface ( 32 ) and two of the side surfaces ( 36, 38, 40, 42 ). The top surface ( 32 ) of the cutting insert ( 30 ) includes a concave or dish-shaped topography that is designed for high-speed milling operations of a metallic work piece. The cutting insert ( 30 ) also includes a bore ( 76 ) in the bottom surface ( 34 ) capable of receiving the raised boss ( 28 ) for securely retaining the cutting insert ( 30 ) within the insert pocket ( 20 ), and reducing bending moment on retaining screw 64 during high-speed milling operations.
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