METHOD OF ROUND SEAMS WELDING Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: method provides for assembly of pieces, that have round seams in staggered rows, and continuous welding of two neighboring rows with alternation of round seams of first and second rows. In process of assembly second piece of first row is laid on first piece of first row with overlapping by value of flange. First piece of second row is laid on second piece of first row also with overlapping by value of flange. Then under flange of first piece of second row and flange of second piece of first row they put second piece of second row, on its flange third piece of second row is laid, on which third piece of first row is put. Process of laying is going on, beginning with fourth piece of first row put under flange of third piece of first row. Welding begins from first piece of first row in point, that is spaced clockwise by value of seam radius from line, connecting centers of welding seams of first pieces of first and second rows, and is going on counter clockwise till line, connecting centers of seam. Then they pass to first piece of second row welding, extending welding arc up to height of corrugation and twice value of filter flange thickness. To weld round seam of first piece of second row they decrease length of welding arc till working one and welding is carried out clockwise up to line, that connects centers of round seams of first piece of second row and second piece of first row. Then welding arc is extended up to height of corrugation plus twice thickness of flange, transfer arc to second piece of first row and carry on welding of round seam counter clockwise with overlapping round seam by value of radius of its perimeter until crossing point with line, that connects centers of round seams of second pieces of first and second rows. Then round seams welding is going on similarly in staggered rows. EFFECT: method is used in mechanical engineering. 3 dwg