2018 Volume 23 Pages 45-50
In a large-area electron beam (EB) method developed recently, the EB of 60mm in a diameter can be used for melting or evaporating of metal surface instantly. Thus, smoothing of metal surface could be performed efficiently by preferential melting of convex parts with the surface roughness of several μmRz. It was also confirmed that edge of convex parts was rounded by the EB irradiation, since the material removal remarkably progressed due to the electron concentration and heat accumulation at the edge. It is highly expected that micro burrs can be instantly and preferentially removed by the EB irradiation. In this study, micro-deburring of rollover burr is experimentally investigated by using the preferential edge removal effect in the large-area EB irradiation. In addition, variations of burr height for each number of shot are analyzed and predicted by unsteady heat conduction analysis.
