Rotary cutting tool
AssigneeA.L.M.T. Corp.
InventorsYuma MIYAZAKI, Kentaro SHIRO
Life of this patent
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Abstract
An outer peripheral cutting edge located on a rear side in a rotation axis direction of the inclined cutting edge, a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge, in a cross section perpendicular to a direction in which the inclined cutting edge extends, a cutting edge ridge of the inclined cutting edge has a roundness of a radius less than or equal to 30 μm, and a maximum height difference value of the cutting edge ridge of the inclined cutting edge is less than or equal to 20 μm.
Claims8
A rotary cutting tool comprising:
- a base metal;
- and
- a plurality of PCBN tips provided on an outer periphery of the base metal,
- wherein
- each of the plurality of PCBN tips has an inclined cutting edge located at an outer peripheral forefront and forming an angle greater than or equal to 20° and less than or equal to 80° with respect to a rotation axis, and an outer peripheral cutting edge located on a rear side in a rotation axis direction of the inclined cutting edge,
- a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge,
- in a cross section perpendicular to a direction in which the inclined cutting edge extends, a cutting edge ridge of the inclined cutting edge has a roundness of a radius less than or equal to 30 μm, and
- a maximum height difference value of the cutting edge ridge of the inclined cutting edge is less than or equal to 20 μm.
A rotary cutting tool comprising:
- a base metal;
- and
- a plurality of PCBN tips provided on an outer periphery of the base metal,
- wherein
- each of the plurality of PCBN tips has a curved cutting edge located at an outer peripheral forefront and having an inclination to a rotation axis varied, and an outer peripheral cutting edge located on a rear side in a rotation axis direction of the curved cutting edge,
- a rotation diameter of the base metal on the rear side in the rotation axis direction of the outer peripheral cutting edge is smaller than a rotation diameter of the outer peripheral cutting edge,
- in a cross section perpendicular to a direction in which the curved cutting edge extends, a cutting edge ridge of the curved cutting edge has a roundness of a radius less than or equal to 11 μm, and
- a maximum height difference value of the cutting edge ridge of the curved cutting edge is less than or equal to 20μm.
Dependencies are inferred from the claim text.