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US 2023/0182218 A1Published application
Cutting tool
AssigneesSumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
InventorsMayuka SEGAWA, Naoki WATANOBE, Taisuke HIGASHI, Takashi HARADA, Satoru KUKINO
Life of this patent
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Abstract
A cutting tool rotates about a rotation axis, and includes a tip end portion. The tip end portion includes a partially spherical surface that is brought into contact with a workpiece. The surface is provided with a plurality of recesses disposed apart from each other. An opening edge of each of the plurality of recesses constitutes a cutting edge.
Claims17
A cutting tool that rotates about a rotation axis, the cutting tool comprising:
- a tip end portion, wherein
- the tip end portion includes a partially spherical surface that is brought into contact with a workpiece,
- the surface is provided with a plurality of recesses disposed apart from each other, and
- an opening edge of each of the plurality of recesses constitutes a cutting edge,
- wherein equivalent circle diameter of each of the plurality of recesses is greater than or equal to 1 μm and less than or equal to 100 μm, and the tip end portion is formed of binderless cubic boron nitride or nano polycrystalline diamond.
2 more elements
(canceled)
A cutting tool that rotates about a rotation axis, the cutting tool comprising:
- a tip end portion, wherein
- the tip end portion includes a partially spherical surface that is brought into contact with a workpiece,
- the surface is provided with a plurality of recesses disposed apart from each other, and
- an opening edge of each of the plurality of recesses constitutes a cutting edge,
- wherein
- the surface is provided with a plurality of flutes extending radially from a central portion of the surface, and
- the plurality of recesses are disposed at portions of the surface between the plurality of flutes.
4 more elements
Dependencies are inferred from the claim text.