抄録
In a large-area EB irradiation method developed recently, high energy density EB can be obtained without focusing the beam. Then, large-area EB of 60mm in diameter can be used for melting or evaporating metal surface instantly, and the surface smoothing of metal mold can be performed efficiently. When the large-area EB is irradiated to a sharp edge, the material removal remarkably progresses at the edge. By using this phenomenon of preferential removal at the convex part, it is expected that micro-deburring by the large-area EB irradiation would be possible. When the large-area EB was irradiated to a rollover burr generated in face milling, the burr height could be reduced. In this study, the shape changes of rollover burr were experimentally investigated by SEM observation of the cross sections. Also, unsteady heat conduction analysis in this deburring method was done with considering the movement of melting part.
