Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1992-03-30
1993-08-17
Jones, David
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72 58, 72 60, 294211, B21D 3908
Patent
active
052358364
ABSTRACT:
An apparatus is provided for filling a tube with fluid and for pressurizing the tube, in order to expand and form it within a die for example. The apparatus provides a high flow-low pressure fluid circuit for quickly filling and draining the tube, together with a separate high pressure-low flow fluid circuit for pressurizing and depressurizing the tube. The high pressure circuit of the apparatus includes a shaft having a longitudinal bore, communicating with a high pressure fluid source and controls; tube sealing device adjacent the forward end of the shaft for sealing the tube when the shaft is engaged with the tube and high pressure fluid flows into the tube; and a shaft reciprocating mechanism for advancing and retracting the shaft. The high flow circuit of the apparatus includes: a forwardly open shroud, housing the forward end of the shaft when retracted and having a rearward opening slidably and sealably engaging the forward end of the shaft rearward of the tube sealing device, the interior of the shroud communicating with a high flow-low pressure fluid source and controls; an external seal device about the forward opening of the shroud for sealing an external surface adjacent an end of the tube; and a shroud reciprocating mechanism for advancing and retracting the shroud. In operation therefore: the shroud is advanced to seal the external surface; the tube is filled with low pressure fluid; the shaft is advanced and the tube sealing device engaged; the tube is pressurized; and the process is reversed to release the tube.
REFERENCES:
patent: 2203868 (1940-06-01), Gray et al.
patent: 2837810 (1958-06-01), Ekholm
patent: 3359624 (1967-12-01), Cours et al.
patent: 3542076 (1970-11-01), Richardson
patent: 3625040 (1969-08-01), Gain
patent: 4320568 (1982-03-01), Herrod et al.
patent: 4641407 (1987-02-01), Blevins et al.
patent: 4761981 (1988-08-01), Kelly
patent: 4761982 (1988-08-01), Snyder
patent: 4779333 (1988-10-01), Rabe et al.
patent: 4827605 (1989-05-01), Krips et al.
Klages Gerrald
Krasnicki Frank
Mason Murray
Jones David
TI Corporate Services Limited
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