How to make struts and struts

摘要

A strut (1) comprising a long beam portion (2) and at least one connection end portion (3);The long beam sectionA tubular structure having an outer circumference (c);And the connection end portionIt is integral with the long beam partAnd composed of bent and planarized end portions of the tubular structure;Diametrically opposed inward bent lines (5) areThe flat portion of the end portion of the tubular structure3b hit betweenBy thatThe resulting connection end portion (3) isContaining four material layersConnection endHaving a width (W) in the direction crossing the longitudinal centerline (L) of the connection end portion;WhereW > C / 4.StrutA step (101) and a tubular element (10) having an outer circumferenceForming the connection end portion (3) at the end of the tubular element (10) (102IncludingA method of manufacturing strut (1);Connection endA portion (3 ') of the tubular element (10) is formed by bending (102) and planarizing (103);Bent (102)The portion (3 ') is deformed to form an inward bent lineAnd an inward bent lineFrom the side facing the diameter directionIn the direction (P1) toward the center (x) of the tubular elementIt is carried out by pressing until the inward bent line (5) hitsAnd planarization (103) isThus folded (3 ')From the opposite direction (P2) perpendicular to the pressing directionIt is carried out by pressing toward the center (x) of the tubular element andAndAn end portion (3) including four material layers is obtained.Method.