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최인휴(Inhugh Choi),정태성(Taesung Jung),홍원표(Wonpyo Hong),양민양(Minyang Yang) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Finish machining of a curved surface is often carried out by an NC system with curve interpolation in the<br/> field. This NURBS interpolation adopts a feedrate optimizing strategy based on both the geometrical<br/> information and dynamic properties. In case of a finish cut using a ball-end mill, the curve interpolator needs<br/> to take the machining process into account for more improved surface, while reducing the polishing time. In<br/> this study, the effect of low machinability at the bottom of a tool on surface roughness is also considered. A<br/> particular curve interpolation algorithm is proposed for generating feedrate commands which are able to<br/> control the roughness of a curved surface. The simulation of the machined surface by the proposed algorithm<br/> was carried out, and experimental results are presented.
정태성(Taesung Jung),최인휴(Inhugh Choi),양민양(Minyang Yang) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
An adequate method for the prediction of machining errors is essential to improve productivity and<br/> product quality. But it is known that there is a remarkable difference between values calculated by<br/> conventional roughness model and measured values of actual machined surfaces under high efficient cutting<br/> condition. This paper introduces the theoretical analysis of characteristic lines of cut remainder to evaluate a<br/> geometrical surface roughness accurately. In this study, analytic equations of the characteristic lines are<br/> derived from the surface generation mechanism of ball end milling considering the actual trochoidal<br/> trajectories of cutting edges. The predicted results are compared with the results of conventional roughness<br/> model.