한국정밀공학회:학술대회논문집 (Proceedings of the Korean Society of Precision Engineering Conference)
- 한국정밀공학회 1997년도 춘계학술대회 논문집
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- Pages.1078-1082
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- 1997
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- 2005-8446(pISSN)
STB-11 경도변화에 따른 CBN볼 엔드밀의 절삭특성
Cutting Characteristics of CBN Ball Endmills for STD-11 of Various Hardnesses
초록
The use of CBN tool material has been greatil increased because of the superior metal cutting performance for the machining of hardened steels. This paper presents some experimental results on the ball endmilling of hardened steels. Three different hardnesses of STB-11 workpieces were machined using CBN ball endmills, and the machining charteristics including cutting forces, tool wear, and surface roughness of machined surface were compared. It has been found that the CBN ball endmill works better in the machining of harder workpieces. The microscopic examination explains that this unusual phenomenon is cause by the difference of microstructure of each workpieces.