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High-efficiency finishing process for metal mold by large-area electron beam irradiation |
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| Authors: | Yoshiyuki Uno Akira Okada Kensuke Uemura Purwadi Raharjo Toshihiko Furukawa Kosaku Karato |
| Affiliation: | aDepartment of Mechanical Engineering, Okayama University, Okayama 700-8530, Japan bNagata Seiki Co. Ltd., Bunsui-cho, Niigata 959-0121, Japan cSodick Co. Ltd., Yokohama 224-8522, Japan |
| Abstract: | A new finishing process for metal molds by large-area electron beam (EB) irradiation is proposed in this study. In the large-area EB irradiation equipment used here, an EB with high-energy density is irradiated without focusing the beam, and so the EB with a maximum diameter of 60 mm can be used for melting or evaporating metal surface instantly. Experimental results show that the surface roughness decreases from 6 μmRz to less than 1 μmRz in just a few minutes under proper machining conditions. The corrosion resistance of metal mold surface also could be greatly improved by large-area EB irradiation. Furthermore, the surface roughness of tilting surface close to 90° could be well improved. Therefore, large-area EB irradiation method has a possibility to become a high-efficiency finishing process for metal molds. |
| Keywords: | Electron beam Surface finishing EDM Metal mold Corrosion resistance |
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