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US 12,599,976 B2Granted
Rotary cutting tool
AssigneeKanefusa Kabushiki Kaisha
InventorYasunari Yamada
Life of this patent
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Abstract
A rotary cutting tool, which is excellent in defect resistance and has a stable lifespan, includes a rake surface composed of one surface, a cutting edge angle that is larger than 0° and smaller than 90°, a true rake angle that is not smaller than −42° and not larger than −13°, and a major cutting edge inclination angle that is not smaller than −5° and smaller than +5°. A wiper insert is preferably formed in a rounded convex shape.
Claims3
A rotary cutting tool comprising:
- a cutting tip formed of a hard sintered body, wherein
- a rake surface of the cutting tip, a portion located within about a feed amount per blade from a major cutting edge is composed of one surface, a cutting edge angle is larger than 0° and smaller than 90°, a true rake angle is not smaller than −30° and not larger than −20°, and a major cutting edge inclination angle is not smaller than −5° and smaller than +5°.
Dependencies are inferred from the claim text.