Lightweight connection between steel tube and cast aluminum automobile component, is formed by weld-metal-filled annular recess surrounding tube, with bonding by both fusion and soldering

摘要

The end section (4) of the tubular profile (2) enters an accommodation recess (14) in the component (3). The space between the end section and the recess (14) is filled with a material. This is an aluminum-based, weld-filler material (15). Optionally, the end of the tube completely penetrates the component and accommodation recesses are provided at each end of the penetration. The recesses take the form of circular excavations. The end section of the tube is oval in form. The tube end is flared-out, forming a radial collar. It is inserted into an annular groove (6) of the component. The accommodation recess is delimited by the outer surface (11) of the tube end, the adjacent side of the collar and the inner surface of the recess facing the end of the tube. The collar is bent over through a right angle and the annular groove has a rectangular cross section. The collar is alternatively turned-out into a diffuser- or trumpet-like form. A dished section is formed into the outer surface of the tube end, in the region of the accommodation recess.