Apparatus and method for making an automotive bumper beam

摘要

Disclosed is an apparatus and method for making an automotive bumper beam (8) by a single roll forming. The apparatus of the present invention comprises an uncoiler (20); a straightener (22); a brake press (24); a first group of roll formers (26); a second group of roll formers (28); a final sweep roll former (30); adjuster (32); welding member (34); and cutting member (35). The method of the present invention is comprising of a step of preparing the steel sheet; a step for forming the tubular cross-sectional shape on the steel sheet; a step for forming a sweep on the steel sheet; a step for adjusting the tubular cross-sectional shape of the steel sheet; a step for welding two flanges to each other at their terminal ends; and a step for cutting the steel sheet to the predetermined length. The bumper beam manufactured according to the present invention has the tubular cross-sectional shape comprising the front wall having an central indented portion, the top and bottom walls, the upper and lower rear walls, and the upper and lower inner walls having respective flanges, by a single roll forming process.