JPS56134085A - Electron beam welding method - Google Patents

Abstract

PURPOSE: To eliminate the excess part of weld defects after the end of welding and facilitate the removal of the weld defects by beforehand forming the excess part larger than one of the shapes to be welded to each other and using this as the beginning and final ends of an electron beam.

CONSTITUTION: Beforehand, the shape of one material 19 to be welded is made larger than the shape required for a produce 18, and the body 19a and excess part 19b are formed into one body. Next, the other material 20 to be welded is fitted into the mounting hole 19c of the material 19, and a groove line 21 is formed between both materials 19 and 20. Thence, with the end edge of the material 19 as a beginning end part D, electron beam welding is started. The electron beam is passed from the excess part 19b to the body part 19a, and when it arrives at the meeting point 21' of the groove line 21, it is scanned along the groove line 21, and the electron beam reaches the meeting point 21' again. After this, the electron beam is brought from the groove line 21 to the body part 19a and the excess part 19b, and the welding is finished with the end edge of the excess part 19b as the final end part E of the electron beam. When the excess part 19b is removed, the weld defects at the beginning end and final end D, E are removed.

COPYRIGHT: (C)1981,JPO&Japio