| 摘要 |
PURPOSE:To improve a working accuracy and to shorten a working time by adding a high speed deflecting function to the deflecting function of an electron beam and performing the time share of a beam deflecting pattern as well as multi-beading one beam. CONSTITUTION:A high speed deflecting function is given with its adding to the deflecting function of the electron beam emitted from an electron gun 1 and the deflecting pattern of an electron beam 4 is optionally time-shared as well. Namely the electron beam 4 is made a multi beading by its deflection via a deflecting coil 3 and in case of forming a welding bead on a work 5, a beam deflecting pattern is subjected to time sharing by performing a center bead forming, etc., after forming the preceding bead at both sides. With this method the bead 4 having a smooth surface is formed by preventing an undercut forming. Consequently a microworking is enabled and a working distorsion is reduced as well. Namely the improvement in working accuracy and the shortening in working time are made possible.
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