Hydroformed structural member with varied wall thickness

Details Hydroformed structural member with varied wall thickness Hydroformed structural member with varied wall thickness

1995-11-13

1996-09-24

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

294211, B21D 3920

Patent

active

055579612

ABSTRACT:
A method for hydroforming a tubular structural member of generally polygonal, flat walled cross section in which the various walls in the final part do not have the same thickness. A cylindrical tubular blank is extruded in which the outer surface is round, but in which the inner surface is asymmetrical, providing several contiguous angular sectors or portions of varying width and thickness. Each individual angular portion is tailored as to thickness and width to correspond to a respective wall in the final part. The blank is oriented between in a die cavity so as to align each angular portion with a respective wall of the finished part, and hydroformed in conventional fashion.

REFERENCES:
patent: 4759111 (1988-07-01), Cudini
patent: 4827100 (1989-05-01), Frings et al.
patent: 5070717 (1991-12-01), Boyd et al.
patent: 5170557 (1992-12-01), Rigsby
patent: 5303570 (1994-04-01), Kaiser
patent: 5333775 (1994-08-01), Bruggemann et al.
patent: 5431326 (1995-07-01), Ni et al.
Automotive Industries, "Hydro-Forming is Hot", Jun. 1991.

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