| 摘要 |
<p>Apparatus and a method are shown for manufacturing a diamond filled compact (11, 23, 29, 31, 41, 43, 53, 55) of the type used as a cutting insert which is received in a cutting insert pocket in a drill bit face. Also shown is a fixed cutter earth boring drill bit (84) using the compact. The compact includes a hard metal jacket (13) having an open end and an open interior. The open interior is substantially filled with diamond (19). The diamond filled jacket is subjected to a temperature and a pressure sufficient to sinter the diamond and integrally form a diamond core within the hard metal jacket. The outer dimensions of the hard metal jacket are then reduced to a size selected to conform to a cutting insert pocket provided on the face of a drill bit. The compact is mounted over the cutting surfaces of the one-piece fixed cutter drill bit. <IMAGE></p> |
