US 12,325,078 B2
Cutting insert, cutting tool, and method for manufacturing machined product
Hironori Nishikoori, Yasu (JP)
Assigned to KYOCERA CORPORATION, Kyoto (JP)
Appl. No. 17/913,434
Filed by KYOCERA CORPORATION, Kyoto (JP)
PCT Filed Mar. 24, 2021, PCT No. PCT/JP2021/012220
§ 371(c)(1), (2) Date Sep. 22, 2022,
PCT Pub. No. WO2021/193709, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-054422 (JP), filed on Mar. 25, 2020.
Prior Publication US 2023/0132425 A1, May 4, 2023
Int. Cl. B23C 5/20 (2006.01); B23C 5/02 (2006.01); B23C 5/10 (2006.01)
CPC B23C 5/109 (2013.01) [B23C 5/202 (2013.01); B23C 2200/0411 (2013.01); B23C 2200/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cutting insert, comprising:
an upper surface having a polygonal shape comprising a long side and a short side;
a lower surface located on a side opposite to the upper surface;
a lateral surface located between the upper surface and the lower surface;
a through hole that opens into a center of the upper surface and a center of the lower surface; and
a cutting edge located on the short side, wherein
the lateral surface comprises a first lateral surface that is located along the long side and has an outwardly protruded shape in a top view,
the first lateral surface comprises
a first surface that is overlapped with a central axis of the through hole in a side view of the first lateral surface and is parallel to the central axis,
a second surface that is located closer to the short side than the first surface and is parallel to the central axis,
a third surface that is located more away from the short side than the first surface and is parallel to the central axis, and
a first inclined surface that is located between the second surface and the upper surface, and is inclined toward the central axis as the first inclined surface extending toward the long side,
the first inclined surface is spaced from the first surface, and
the first inclined surface comprises a region having an inclination angle relative to the central axis, the inclination angle becoming smaller as the first inclined surface extending toward the first surface.