Spirally-fed drilling and milling cutter
OwnerHsin-Tien Changinventor
Life of this patent
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Abstract
A spirally-fed drilling and milling cutter to be driven spirally in order to drill and mill includes a shank, a groove at one of a plurality of offset positions at one end of the shank, a blade at a bottom side of the groove, and a spiral flute on the periphery of the main body of the shank, wherein the spiral flute has a flute end connected with the groove. When the cutter is rotated at high speed and in high torsion, drilling/milling chips are pushed upward, along with a cutting liquid, through the spiral flute out of a hole being made. Thus, the heat generated by the cutting action is reduced, and the chips are efficiently discharged, allowing the cutting edges to stay sharp and the cutter to make deep holes.
Claims8
A spirally-fed drilling and milling cutter to be driven spirally in order to drill and mill, comprising:
- a shank having a pair of grooves provided at an end of the shank extending downwardly therefrom;
- a blade provided at a bottom portion of each of the pair of grooves, the blade having a downwardly facing bottom side and a lateral side, at least a portion of the bottom side being formed with an undulating contour, each blade having a first cutting edge defined between the bottom and lateral sides, and a second cutting edge formed along the lateral side of the blade, the second cutting edge being a straight shaped edge;
- and
- spiral flutes provided on a periphery of a main body of the shank and each being connected with a corresponding groove.
Dependencies are inferred from the claim text.