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US 11,794,259 B2Granted
Rotary cutting tool
AssigneeSumitomo Electric Hardmetal Corp.
InventorsMasashi Harada, Naoki Watanobe, Takashi Harada, Taisuke Higashi
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool according to the present disclosure is rotatable about an axial line and includes a rake face and a flank face. The flank face is contiguous to the rake face. A ridgeline between the rake face and the flank face constitutes a cutting edge. In a cross section perpendicular to the axial line, the rake face is constituted of a plurality of straight line portions.
Claims13
A rotary cutting tool rotatable about an axial line, the rotary cutting tool comprising:
- a rake face;
- and
- a flank face contiguous to the rake face, wherein
- a ridgeline between the rake face and the flank face constitutes a cutting edge,
- in a cross section perpendicular to the axial line, the rake face is constituted of a plurality of straight line portions,
- a swarf discharging flute is formed in the rotary cutting tool,
- the swarf discharging flute is provided helically around the axial line,
- a portion of the swarf discharging flute is constituted of the rake face,
- the plurality of straight line portions include a first straight line portion and a second straight line portion, the first straight line portion being contiguous to the flank face, the second straight line portion being inclined with respect to the first straight line portion, the second straight line portion being contiguous to the first straight line portion, a first angle formed by the first straight line portion and the second straight line portion is more than or equal to 160°,
- wherein the plurality of straight line portions of the rake face form a concave edge.
7 more elements
Dependencies are inferred from the claim text.