Method for producing a bumper exhibiting a crushed profile

摘要

A method for forming a beam exhibiting non-parallel opposing surfaces including the steps of unreeling, in sheet form, a selected running length of a roll material and forming the steel roll into a generally three-dimensional and tubular shape exhibiting a closed cross section. Additional steps include heating the tubular shaped material inwardly displacing at least one of first and second opposing surfaces associated with the tubular shaped material, relative to one another, and concurrent with imparting an overall arcuate shape to the material.