To provide a welding method for a hollow engine valve capable of improving the quality of a welding part.
In the welding method for a hollow engine valve obtained by welding valve umbrella member 11 of a hollow shaft shape having an umbrella shape at one end thereof and an axial shaft-end sealing member 12 with each other, a welding part formed by bringing an end surface 21 of a hollow shaft part 11b of the valve umbrella member 11 into contact with an end surface 31 of the shaft-end sealing member 12 is irradiated with electron beams E from two directions point-symmetric with respect to the axis of the valve umbrella member 11 and the shaft-end sealing member 12, and the valve umbrella member 11 and the shaft-end sealing member 12 which have been brought into contact with each other are rotated about the axis. As a result, the valve umbrella member 11 and the shaft-end sealing member 12 are welded together.
MORII HIROKAZU
HIRAO KENICHIRO
TSUBOTA SHUHO
Tadahiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto