Method for hydroforming a hollow profile

Details Method for hydroforming a hollow profile Method for hydroforming a hollow profile

2006-04-11

2006-04-11

Larson, Lowell A. (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S370220

Reexamination Certificate

active

07024898

ABSTRACT:
A process as claimed for the invention for internal high-pressure reshaping of a hollow section (12) in a reshaping tool, a fluid being introduced under high pressure P1into a hollow section and this section having a transitional area with different wall thicknesses in the area of an edge (18to21) to be blocked, is characterized in that the shape selected for the hollow section (12) in the initial state is such that a thickened area (22to25) extends a certain distance from the edge (18to21) into the wall section (14, 16) with smaller wall thickness. As a result, constrictions can be avoided during reshaping and favorable edge geometries can be achieved (FIG.2).

REFERENCES:
patent: 3209432 (1965-10-01), Cape
patent: 5557961 (1996-09-01), Ni et al.
patent: 1452646 (1969-03-01), None
patent: 19740323 (1999-03-01), None
patent: 0795365 (1997-09-01), None

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