Patent ID: 6513242
Filing Date: 2003-02-04
Classification: B21D,B62D,Y10T

Abstract:
A method for manufacturing a vehicle body and frame assembly having a predetermined length and being supported upon a plurality of ground-engaging wheels by a resilient suspension system, said method comprising the steps of:(a) providing a single integral workpiece having a closed channel cross sectional shape and a length that is substantially the same as the predetermined length of the vehicle body and frame assembly; (b) hydroforming the single integral workpiece to form a completed first side rail having a desired shape and a length that is substantially the same as the predetermined length of the vehicle body and frame assembly; (c) providing a second side rail; (d) providing a plurality of cross members; (e) securing the cross members to the side rails to form the vehicle body and frame assembly; and (f) supporting the vehicle body and frame assembly upon a plurality of ground-engaging wheels by a resilient suspension system.