Cutting insert and Tool mounted withthere

A cutting insert according to an embodiment of the present invention is a double-sided cutting insert including an upper surface, a lower surface, a side surface, a cutting edge and a coupling hole penetrating the upper surface and the lower surface. The upper surface includes a single and flat uppe...

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Bibliographic Details
Main Authors KIM YOUNG HEUM, NAM KI CHAN, LEE NAM SEON, KIM TAE KYUN
Format Patent
LanguageEnglish
Korean
Published 21.03.2022
Subjects
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Summary:A cutting insert according to an embodiment of the present invention is a double-sided cutting insert including an upper surface, a lower surface, a side surface, a cutting edge and a coupling hole penetrating the upper surface and the lower surface. The upper surface includes a single and flat upper surface boss part enveloping the coupling hole. The cutting edge includes: a main cutting edge; a corner cutting edge connected to the main cutting edge; a subsidiary cutting edge connected to the corner cutting edge; and a side part connected to the subsidiary cutting edge. A first main cutting-edge relief surface connected to the main cutting edge forms an acute angle with an extension line of the upper surface boss part. An angle formed by a subsidiary cutting edge chip breaker surface connected to the subsidiary cutting edge together with the extension line of the upper surface boss part becomes greater accordingly as the subsidiary cutting edge chip breaker surface becomes more distant from the corner cutting edge. A side part surface connected to the side part is indented concavely when the cutting insert is viewed from the upper surface. 본 발명의 한 실시예에 따른 절삭인서트는 상면, 하면, 측면, 절인, 그리고 상기 상면 및 상기 하면을 관통하는 체결구멍을 포함하는 양면형 절삭인서트로서, 상기 상면은 상기 체결구멍을 둘러싸고 평탄한 단일의 상면보스부를 구비하고, 상기 절인은 주절인, 상기 주절인에 이어지는 코너절인, 상기 코너절인에 이어지는 부절인, 그리고 상기 부절인에 이어지는 변부를 구비하고, 상기 주절인에 이어지는 제1 주절인여유면은 상기 상면보스부의 연장선과 예각을 이루고, 상기 부절인에 이어지는 부절인칩브레이커면은 상기 코너절인으로부터 멀어질수록 상기 상면보스부의 연장선과 이루는 각도가 점점 증가하고, 상기 절삭인서트를 상기 상면에서 바라볼 때, 상기 변부에 이어지는 변부표면은 오목하게 요입된 것을 특징으로 한다.
Bibliography:Application Number: KR20200174171