METHOD OF ELECTRON-BEAM WELDING GLASS TUBE PARTS Russian patent published in 2017 - IPC B23K15/06 B23K31/02 

FIELD: electricity.

SUBSTANCE: parts are placed in a vacuum chamber, pressures of 5÷20 Pa are created in it and a weld is formed at the joint of the parts by a focused electron beam from the source of the focused beam. Before welding and during welding, the tube regions adjacent to the junction are heated by two counter defocused electron beams while rotating the welded parts around the axis of symmetry. The focused electron beam is oriented perpendicular to the directions of the defocused beams.

EFFECT: use of two counter defocused electron beams with simultaneous rotation of the welded parts and a perpendicular orientation of the focused electron beam ensures an improvement in the quality of the welded joint due to the symmetry of the irradiation and, as a result, simultaneous heating of the pipe sections adjacent to the weld, which in turn reduces the temperature gradients and eliminates the cracking of pipes.

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