パルス化電子ビームによる薄板溶接の試み

概要

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Electron beam welding is usually performed by a continuous and moving beam. Pulsed beam appears useful for rather small machine parts because it can weld them by a high peak but low average power ; therefore, thermal effect on the machine can be made smaller. On the basis of the consideration above, experiments were carried out varying duty factor (0.05-0.45), fre-quency (2.4-1000Hz), and peak beam current (12-35mA) under a fixed acceleration voltage of 50 kV. Full penetration welding is produced only in a certain condition determined by the relationships between frequency and duty factor. For a fixed duty factor and constant peak beam current, bead width depends on frequency in low frequency region ;for a high frequency, it holds constant. The bead width does not depend on the peak beam current. This seems due to the passing loss of energy, through a cavity hole produced in the weld zone.
公益社団法人精密工学会の論文
1985-06-05