The function of coolant in machining is to reduce the frictional force in the contact area in between the tool and the material, and to increase the precision by cooling the work-piece and the tool, to make the machining surface uniform, and to extend the tool life. However, cutting oil is harmful to the human body because it uses chlorine-based extreme pressure additives to cause environmental pollutants. In this study, the effect of cutting temperature and surface roughness of titanium alloy for medical purpose (Ti-6Al-7Nb) in eco-friendly ADL slot shape machining was investigated using the response surface analysis method. As the design of the experiment, three levels of cutting speed, feed rate, and depth of cut were designed and the experiment was conducted using the central composite planning method. The regression expressions of cutting temperature and surface roughness were respectively obtained as quadratic functions to obtain the minimum value and optimal cutting conditions. The values from this formula and the experimental values were compared. As a result, this study makes and establishes the basis to prevent environmental pollution caused by the use of coolant and to replace it with ADL (Aerosol Dry Lubricant) machining that uses a very small amount of vegetable oil with high pressure.

1. 서 론
    1.1 연구 배경
    1.2 연구 필요성 및 연구 목적
2. 실험 설계 및 데이터
    2.1 실험 설계
    2.2 실험 데이터 수집
    2.3 절삭온도
    2.4 표면거칠기
3. 중심합성계획법
    3.1 중심합성계획법 실험
    3.2 절삭온도
    3.3 표면거칠기
4. 절삭온도 및 표면거칠기 비교
    4.1 절삭온도 비교
    4.2 표면거칠기 비교
5. 비교 분석
6. 결 론
References

• Jeong Sik Han(창원대학교 산업시스템공학과) | 한정식
• Jong Yun Jung(창원대학교 산업시스템공학과) | 정종윤 Corresponding Author