Patent ID: 6814275
Filing Date: 2004-11-09
Classification: B21C,Y10T

Abstract:
A method of manufacturing a structural element having a metal wall of generally tubular shape and comprising at least two segments, the method comprising the steps of:cutting out at least one plane face from a sheet of metal material, the blank having a main part having the developed shape of the segments of the wall of the structural element, and for each of the segments, at least one overlap and fixing tab, together with at least one additional tab for fixing segments together; folding the cutout blank along a plurality of lines so as to form the wall of the structural element out of folded portions of the main part of the cutout blank; and using welding to fix at least one additional overlap fixing tab of each of the segments to at least one additional tab for fixing segments together over at least one of a folded portion of the wall of the structural element or a second overlap tab, the at least one additional overlap and fixing tab of each segment and the at least one tab for fixing segments together and the folded portion of the wall or the second overlap tab being maintained to bear resiliently one against the other.