Patent ID: 9566848
Date: 2017-02-14
CPC Classifications: B21D,B60J

Claim:
1. A method of forming an elongate multiple channel structural door beam for vehicles, comprising: forming a center channel of an elongate multiple channel structural door beam from a central web of given thickness and known material composition by a first cold forming operation; forming two outer channels of the elongate multiple channel structure door beam by a second cold forming operation subsequent to the first cold forming operation, wherein the two outer channels are separated one from the other in a lateral direction and disposed on opposite sides of the center channel and a first one of the two outer channels is drawn to a peak of known height H; and wherein the center channel defines a trough between the two outer channels, wherein the material quality and trough to peak distance exceeds a maximum quality and distance that is achievable in a single cold forming operation for the given thickness and material composition of the web.