Multi-chamber closed structural element and method of manufacturing a multi-chamber closed structural element

Abstract

The present disclosure relates to a method of manufacturing a multi-chamber closed structural element, the method comprising the steps of: a) at least one chamber profile preform is provided, comprising an inner wall and an outer wall made of a sheet of metal material and arranged in substantially parallel planes with respect to one another with a gap between them, wherein the edges of the individual walls converge, wherein a vent is arranged on at least one wall; b) the unconnected edges of the walls of the chamber profile preform are sealed by means of a seal to form a closed hermetic hollow internal space of the chamber profile preform, said space comprising the end edges of the chamber profile preform; c) the end edges of at least one chamber profile preform are connected to each other to form a preform of the multi-chamber closed structural element, the preform comprising a central chamber surrounded by an inner wall of the chamber profile preform; d) a pressurised fluid is introduced through a vent into the internal space of at least one chamber profile preform to form a deformed chamber profile. The present disclosure relates also to a multi-chamber closed structural element.

Dependencies are inferred from the claim text.