난삭성 재료의 가공환경변화에 따른 고속가공 특성 평가(압축공기냉각에 의한 공구수명 평가)

Evaluation of Machinability by Cutting Environments in High-Speed Machining of Difficult-to-cut Materials(Test for Tool Life Using Compressed Chilly Air Cooling)

High speed machining of difficult-to-cut materials generates the concentrated thermal/frictional damage at the cutting edge of the tool and rapidly decreases the tool life. In this paper, the cutting environments, such as dry, fluid coolant, and compressed chilly air coolant, were investigated to improve the tool life. For this study, the compressed chilly air system was manufactured. The experiments were performed for various difficult-to-cut materials and various coated tools. The effectiveness of the developed methods on the basis of tool life was estimated. The results show that the cutting environment using compressed chilly air coolant provided better tool life than using the fluid coolant or using the dry.