US 12,280,438 B2
Cutting tool assembly
Chang Gyu Park, Daegu (KR); and Sung Kook Cheon, Daegu (KR)
Assigned to TaeguTec Ltd., Daegu (KR)
Filed by TAEGUTEC LTD., Daegu (KR)
Filed on Nov. 4, 2021, as Appl. No. 17/519,047.
Application 17/519,047 is a continuation in part of application No. PCT/KR2020/005648, filed on Apr. 29, 2020.
Claims priority of application No. 10-2019-0056919 (KR), filed on May 15, 2019; and application No. 10-2019-0105059 (KR), filed on Aug. 27, 2019.
Prior Publication US 2022/0055125 A1, Feb. 24, 2022
Int. Cl. B23C 5/06 (2006.01); B23C 5/20 (2006.01)
CPC B23C 5/06 (2013.01) [B23C 5/202 (2013.01); B23C 2210/247 (2013.01); B23C 2210/285 (2013.01); B23C 2210/287 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A cutting tool assembly, comprising:
a cutter body extending perpendicularly from a bottom surface and including a cylindrical portion with a rotational axis;
a plurality of insert pockets disposed and formed concavely in the bottom surface and the cylindrical portion of the cutter body to be spaced apart from each other along a circumferential direction;
a plurality of fixed cutting inserts mounted within the plurality of insert pockets and disposed at the outermost portion of the cutter body in a radial direction; and
a plurality of stepped cutting inserts mounted within the plurality of insert pockets, each of the plurality of stepped cutting inserts being disposed between two adjacent fixed cutting inserts among the plurality of fixed cutting inserts;
wherein:
each of the plurality of fixed cutting inserts is disposed to have an identical length from the rotational axis and an identical length from the bottom surface;
at least one stepped cutting insert among the plurality of stepped cutting inserts is disposed to have a different length from the rotational axis and a different length from the bottom surface compared to the remaining stepped cutting inserts among the plurality of stepped cutting inserts;
the length from the rotational axis of each of the plurality of fixed cutting inserts is equal to or longer than the length from the rotational axis of each of the plurality of stepped cutting inserts; and
the length from the bottom surface of each of the plurality of fixed cutting inserts is equal to or shorter than the length from the bottom surface of each of the plurality of stepped cutting inserts.