인코넬 718의 엔드밀링시 헬릭스각에 따른 절삭특성 변화 -(I) 상향엔드밀링

Cutting Characteristics Variation of Inconel 718 in End Milling with different Helix Angles -(I) Up End Milling

The purpose of this paper is to investigate the effect of the helix angle of endmilling cutter on the cutting characteristics of inconel 718 in up endmilling. To this end cutters with helix angle of $20^\circ$, $30^\circ$, $40^\circ$ and $50^\circ$ degree have been prepared. And a modified cutting force model in up end milling process is presented. Using this cutting force components of 4-tooth endmills with various helix angles have been predicted. Predicted values of cutting force components are well coincide with the measured ones. As helix angle increases overlapping effects of the active cutting edges increase.