CUTTING INSERT AND CUTTING TOOL

CUTTING INSERT AND CUTTING TOOL

A cutting tool includes a cutting insert 4 that is held in a holder in a detachable manner. The cutting insert 4 has a substantially regular quadrangular shape in plan view and includes four round corners 4a. The cutting insert 4 is formed of CBN sinter as a whole. The cutting insert 4 includes two...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: OKAMURA KATSUMI, KOROGI YOSUKE, WATANOBE NAOKI, YONEKURA HIROKI, TSUKIHARA NOZOMI
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
MILLING
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Beschreibung
Zusammenfassung:A cutting tool includes a cutting insert 4 that is held in a holder in a detachable manner. The cutting insert 4 has a substantially regular quadrangular shape in plan view and includes four round corners 4a. The cutting insert 4 is formed of CBN sinter as a whole. The cutting insert 4 includes two principal surfaces 6 that are upper and lower surfaces opposite to each other, and four side surfaces 7 that are arranged so as to connect the principal surfaces 6 to each other. A boundary portion (ridge line portion) between each of the principal surfaces 6 and each of the side surfaces 7 forms a cutting edge 8. In a central portion of each of the side surfaces 7 of the cutting insert 4, a groove 10 for absorbing a crack, having a substantially V-shape in cross section, is formed all around the cutting insert 4 so as to be recessed with respect to the side surfaces 7.