Method of forming a tubular member with separate flange

Details Method of forming a tubular member with separate flange Method of forming a tubular member with separate flange

1994-09-07

1995-07-11

Ramsey, Kenneth J.

Metal fusion bonding

Process

With shaping

294211, 228157, B21D 2602, B23K 3102, B23K10108

Patent

active

054313260

ABSTRACT:
A hydroformed vehicle body component has an attachment flange or the like-formed as an integral part of the hydroforming process. For a given flange shape, a parting plane for the dies is established relative to which the various surfaces of the flange shape, in cross section, have no significant reverse curvature. Then, a weld line is established which is on or substantially parallel to the parting plane, and which is as symmetrical to the flange as possible. A planar blank sufficient in size to produce the flange is pre welded to a cylindrical blank along the weld line, at the desired location. Shoulders bordering the die cavities and corresponding in shape to the desired flange shape simultaneously form the flange as the dies close. After the dies are closed, the tubular blank is pressurized and formed to shape as usual.

REFERENCES:
patent: 4377732 (1983-03-01), Preller
patent: 5050299 (1991-09-01), Rainville
patent: 5092512 (1992-03-01), Sturrus et al.
patent: 5333775 (1994-08-01), Bruggemann et al.
patent: 5339667 (1994-08-01), Shah et al.

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