볼 엔드밀 가공의 유연 절삭력 모델에 관한 연구 = A Study on the Flexible Cutting Force Model in the Ball End Milling Process

다국어 초록 (Multilingual Abstract)

This research suggests a cutting force model for the ball end milling processes. This model includes the effect of tool run out and tool deflection. In the proposed model, the flutes of ball end mills are considered as series of infinitesimal elements and each cutting edge is assumed to be straight for the analysis of the oblique cutting process, in which the small cutting edge element as been analyzed as an orthogonal cutting process in the plane including the cutting velocity and the chip-flow vector. Therefore, the cutting forces can be calculated through the model using the orthogonal cutting data obtained from the orthogonal cutting test. In order to enhance the performance of the model, the flutes of ball end mill are defined to keep geometric consistency at the peak of the ball part and the junction with he end mill part. The divided infinitesimal cutting edges are regulated to be even lengths. Some experiments show the validity of the developed model in the various cutting conditions.