ELECTRON BEAM WELDING METHOD

摘要

PURPOSE:To stop smoothly wire feed and to eliminate the crater at the beginning and terminal ends of welding in beam welding under wire feeding by positioning the top end of the fed wire right under an electron beam in the stage of starting welding and positioning and same right after the progression of the electron beam in the stage of continuing welding. CONSTITUTION:The top end of a filler wire is positioned right under the electron beam and the pocket part by irradiation of the electron beam is filled by a large amt. of the molten wire to prevent the crater in the stage of starting welding. The filler wire is positioned right after the beam and the welding is executed under the uniform wire feeding in the stage of continuing the irradiation by advancing the beam. The top end of the filler wire is again positioned right under the electron beam to fill the pocket part by a large amt. of the molten wire to prevent the crater when the welding ends. The wire feed is thus smoothly stopped and the satisfactory welding without craters is executed.