Abstract
Small size ball end mills are used for machining of mold and dies frequently. But it is not clear the behaviour of the end mill during machining, because the cutting edge shape is very complex and used under the high speed spindle rotation. Then, we made 3d-CAD model and FEM model of the cutter. And the behaviour of the tool during machining is calculated using cutting force obtained by cutting tests. And also, we discussed the influence of the behaviour on cutting conditions.
