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1. (WO2017150541) CUTTING INSERT AND REPLACEABLE-EDGE CUTTING TOOL

Pub. No.:    WO/2017/150541    International Application No.:    PCT/JP2017/007820
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: B23C 5/20
B23B 27/14
B23C 5/06
Applicants: MITSUBISHI MATERIALS CORPORATION
三菱マテリアル株式会社
Inventors: KAMBARA Masashi
神原 正史
HOKI Hiroshi
保木 宙志
MEGURO Yuuki
目黒 裕輝
HARA Masashi
原 将志
SAKAMOTO Chinami
坂本 千波
Title: CUTTING INSERT AND REPLACEABLE-EDGE CUTTING TOOL
Abstract:
The present invention makes it possible to control the discharging of chips and prevents loss of an insert body and scraping against a head of a clamp screw or a machined wall surface of a work material. The present invention comprises a polygonal plate-shaped insert body (1) provided with first and second polygonal surfaces (2) that are back to back, and a side surface (3) provided on the periphery of the first and second polygonal surfaces (2). A corner edge (5) is formed in a first corner section (C1) of the corner sections of the first polygonal surface (2). A main cutting edge (6) is formed from the corner edge (5) to a second corner section (C2) that is adjacent to the first corner section (C1) in the circumferential direction of the first polygonal surface (2). A secondary cutting edge (7) is formed on the side opposite the side where the main cutting edge (6) extends in the circumferential direction of the first polygonal surface (2) from the corner edge (5). A portion of the corner edge (5) on the main cutting edge (6) side has formed therein a corner edge concave curve section (5A) extending toward the second polygonal surface (2) side while tracing a concave curve that is gradually recessed to the second polygonal surface (2) side going toward the main cutting edge (6).