Hohlprofil für eine Trägerstruktur eines Kraftfahrzeuges

摘要

The hollow strip (2) is formed by the hydraulic widening out internal high pressure deformation of a preshaped initial part (1). The cross-sections differ along the longitudinal direction of the strip. The initial part is produced from an extruded strip which has zones (2') of different wall thickness. The closed hollow extruded strips may be of round or oval cross-section. and may have webs for fixing in a tool and for the fitting of sealing strips. They may be made of non-ferrous metal e.g. aluminium or an aluminium alloy.