GB1402146A - Cold-welded assembly - Google Patents

Abstract

1402146 Welding by pressure METALLWERK MERKUR GmbH 29 June 1972 [29 June 1971] 30493/72 Heading B3R A cold welded assembly comprises two parts of cold weldable material which have been thrust together, a first part having had, prior to thrusting the parts together, ribs extending parallel to or substantially parallel to the direction in which the parts were thrust together, the ribs being cold welded to a co-operating surface of a second part and immediately prior to thrusting the parts together the co-operating surface having been inclined by a small angle to the surfaces of the leading edges of the ribs as seen in a direction at right angles to the direction in which the parts were thrust together. A part 1, Fig. 1, of H-section has ribs 8, 9, of triangular cross-section provided on the inner face of the flanges 3, 4 and a part 2 has two slots 10, 11 of trapeziform section, the inner slot walls 12, 13 being inclined to the vertical and the width y, Fig. 5, of each slot at the top being slightly less than the overall width of the ribbed flanges. The flanges are pressed downwardly into the slots with plastic deformation of the ribs followed by cold welding. The lower edge 5a of the web 5 of part 1 is higher than the lower edges of the flanges to permit insertion of the flanges into the slots. The co-operating wall of the slot may have triangular ribs transverse to the ribs 8, 9. A part 25, Fig. 7, of H-section with ribs 32 on the outer flange surfaces is used to join two tubular parts 23, 24 the part 25 entering the bore of the part 24 and its flanges 30, 31 entering the slots 26, 27 of the part 23. In a modification half of each flange has ribs parallel to the web for welding to the slots 26, 27, of part 23 while the other half has ribs transverse to the first ribs and which transverse ribs cooperate with slots 28, 29 of the part 24. To join parts of a pallet together a longitudinal strip ribbed on each side is inserted in a tapered slot in another part. A ribbed spigot may be inserted in a frusto-conical bore in another part and a bumper bar may be joined to a support means by two ribbed strips, each strip being inserted into a slot formed by opposing recesses in the bar and support.