| 摘要 |
A spirally-fed drilling and milling cutter (10) to be driven spirally in order to drill and mill includes a shank (11), a groove (12) at one of a plurality of offset positions at one end of the shank (11), a blade (13) at a bottom side of the groove (12), and a spiral flute (14) on the periphery of the main body of the shank (11), wherein the spiral flute (14) has a flute end (141) connected with the groove (12). When the cutter (10) is rotated at high speed and in high torsion, drilling/milling chips (40) are pushed upward, along with a cutting liquid, through the spiral flute (14) out of a hole (31) being made. Thus, the heat generated by the cutting action is reduced, and the chips are efficiently discharged, allowing the cutting edges (131, 132) to stay sharp and the cutter (10) to make deep holes. |
