UDK 621.791.72 Vestnik SibGAU 2014, No. 3(55), P. 224–230
D. N. Trushnikov [1], E. Koleva [2],[3], G. Mladenov [2], [3], A. V. Shcherbakov [4]
[1]Perm National Research Polytechnic University 29, Komsomolsky Av., Perm, 614990, Russian Federation [2]Institute of Electronics Bulgarian Academy of Sciences 72, Tzarigradsko Chaussee, Sofia 1786, Bulgaria [3]Technology Centеr of Electron Beam and Plasma Technologies 68–70, Vrania ul., ap. 10, Sofia, 309, Bulgaria [4] National Research University “Moscow Power Engineering Institute” 14, Krasnokazarmennaya str., E-250, Moscow, 111250, Russian Federation Е-mail: trdimitr@yandex.ru
Electron beam welding is used extensively to produce essential machine parts. The control of the basic beam para-meters – beam power or beam current at constant accelerating voltage, welding speed, current of focusing lens and distance between electron gun and welded sample surface – is not enough to obtain at most of the regimes sound welds. Control of the focus position using analysis of the high frequency component of the current, collected by plasma, at periodic interactions on the beam (the oscillation of the beam or modulation of the focusing current) could be a way for the formation of non-defect welds at these conditions. The statistical analysis of weld geometry is shown.
electron beam welding, penetration control, focus control, beam oscillation, focus scanning.
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Trushnikov Dmitriy Nikolaevich – Candidate of Engineering Sciences, associate professor of Applied Physics Department, Perm National Research Polytechnic University. E-mail: trdimitr@yandex.ru

Koleva Elena Georgieva – Doctor, Institute of Electronics of Bulgarian Academy of Sciences, Technology Centеr of Electron Beam and Plasma Technologies. E-mail: eligeorg@abv.bg

Mladenov Georgy Mihaylov – Doctor of Phisical Science, Professor, Corr.Mem. of Bulgarian Academy of Sciences, Institute of Electronics of Bulgarian Academy of Sciences, Technology Centеr of Electron Beam and Plasma Technologies. E-mail: mladenov@ie.bas.bg; gmmladenov@abv.bg