公开(公告)号：US20180318939A1

公开(公告)日：2018-11-08

申请号：US15773263

申请日：2016-09-07

Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.

Inventor： Gaku HARADA ,  Yasuyuki KANADA ,  Kouji SHIMANUKI

IPC: B23B51/02 ,  B23D77/00 ,  B23C5/16

CPC classification number: B23B51/02 ,  B23B51/00 ,  B23B2226/31 ,  B23C5/10 ,  B23C5/16 ,  B23D77/00

Abstract: There is provided a rotary tool including a rotary tool body and a blade provided to the rotary tool body and having a cutting edge, the blade containing 80% by volume or more of diamond, and the blade including a land surface extending along the cutting edge, and a chip breaker having a recess located opposite to the cutting edge with the land surface therebetween.

公开(公告)号：US20210086270A1

公开(公告)日：2021-03-25

申请号：US16473679

申请日：2018-10-10

Applicant: SUMITOMO ELECTRIC HARDMETAL CORP. ,  HARTMETALL-WERKZEUGFABRIK PAUL HORN GMBH

Inventor： Yosuke SHIMAMOTO ,  Yasuyuki KANADA ,  Matthias LUIK

IPC: B23B29/04 ,  B23B27/08 ,  B23B31/00 ,  B23C5/20

Abstract: A cutting insert includes a cylindrical body portion, a cutting portion, a first fitting portion, a second fitting portion, and a third fitting portion. The cutting portion includes a rake face and a flank face. A ridgeline between the rake face and the flank face constitutes a cutting edge. When viewed in the axial direction, the cutting portion is provided opposite to the third fitting portion relative to the insertion hole. When viewed in the axial direction, a straight line extending through an outer circumferential end of the cutting edge and a center of the insertion hole overlaps with the third fitting portion and is located between the first fitting portion and the second fitting portion. A third central angle is smaller than a first central angle and is smaller than a second central angle.