METHOD OF ELECTRON BEAM WELDING Russian patent published in 2014 - IPC B23K15/00 

FIELD: process engineering.

SUBSTANCE: invention relates to electron beam welding and can be used for making butts of thick-sheet structures in various machine building fields. Proposed method consists in that edges of structure elements are assembled line-on-line with clearance. Welding is performed in vacuum with electron beam scanning for forming of weld root and part of its cross-section while other part of weld cross-section on face surface is built up by filler. Note here that one of edges is skewed and clearance between edges is increased towards face side while electron beam scan angle is shifted towards skewed edge. Clearance between edges on back side may no exceed 0.5 mm while clearance between edges on face side makes 1-2 mm. Electron beam is scanned in circle of diameter d=(3/2)b-(1/2)a with centre shift from unskewed edge to skewed edge of Δ=(a+b)/4, where: a is clearance between edges on back side, b is clearance on face side.

EFFECT: higher quality of welding of thick-sheet structures.

3 cl