Electric heating – Metal heating – By arc
Patent
1985-02-20
1987-03-31
Paschall, M. H.
Electric heating
Metal heating
By arc
219121EW, 219121ET, 250397, B23K 900
Patent
active
046545069
ABSTRACT:
A method and apparatus for detecting and regulating a focused condition of an electron beam emitted from an electron gun of an electron beam welding apparatus. An electron beam of a low intensity is first directed onto the workpiece. The coil current of an electromagnetic condenser lens used to focus the electron beam is then varied linearly. The resulting electrons and other radiation produced from the workpiece as a result of this irradiation is then sensed and a signal corresponding to the intensity thereof is produced. The focus position of the electron beam is determined in accordance with variations in this signal.
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Hiramoto Seigo
Sakamoto Masahiko
Yamane Yoshio
Mitsubishi Denki & Kabushiki Kaisha
Paschall M. H.
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