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1. (WO2018180780) CUTTING INSERT, DRILL, AND CUT WORKPIECE MANUFACTURING METHOD

Pub. No.:    WO/2018/180780    International Application No.:    PCT/JP2018/011057
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 21 00:59:59 CET 2018
IPC: B23B 51/00
Applicants: KYOCERA CORPORATION
京セラ株式会社
Inventors: IWASAKI, Kento
岩崎 健人
Title: CUTTING INSERT, DRILL, AND CUT WORKPIECE MANUFACTURING METHOD
Abstract:
A cutting insert according to an aspect of the present invention is provided with: a top surface that has a first side, a first corner, and a second corner; and a through-hole that is open in the top surface. The first side has a first part, a second part, and a third part. The top surface has a first region that is located along the first part, a second region that is located along the second part, and a third region that is located along the third part. The top surface further has a fourth region that is located between the second region and the through-hole and that has a smaller inclination angle than the second region, and a fifth region that is located between the third region and the through-hole and that has a smaller inclination angle than the third region.