| 摘要 |
<p>An indexable tangential cutting insert (100) has a convex top surface (11 0), a bottom surface (112) provided with a cylindrical insert protrusion (13 6), and a peripheral side surface including a pair of opposing major side su rfaces (116A, 116B ) and a pair of opposing minor side surfaces (114A, 114B) . A sloped, major cutting edge (122) is formed at the intersection of each m ajor side surface (116) with the top surface (110), the rake surface being f ormed in the major side surface (122). The bottom surface (112) is provided with an insert protrusion abutment surface (134) for seating the cutting ins ert (100). An insert recess (154) is formed in the cylindrical insert protru sion (136), and this recess (154) communicates with the insert's through bor e (180). The cutting insert (100) is seated in an insert pocket (206) with t he insert protrusion abutment surface (134) in abutment with the pocket base . A protrusion (284) rising from the pocket base and having a threaded bore (280) formed therein enters the recess (154) and is aligned with the insert' s through bore (180).</p> |
