Apparatus for the expansion of tube ends inside of a tube plate

Details Apparatus for the expansion of tube ends inside of a tube plate Apparatus for the expansion of tube ends inside of a tube plate

1977-03-14

1977-10-25

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

Using fixed die

60560, 7245301, B21D 2210, F15B 700

Patent

active

040550630

ABSTRACT:
An apparatus for the expansion of tube ends inside of a tube plate by means of a probe insertable in the respective tube ends, the probe forming an annular space with the tube member to be widened by means of two seals spaced from one another, a pump operatively feeding the annular space with a pressure medium for the expansion, and a pressure intensifier for bringing the pressure medium to a required pressure. A medium separator is connected via a back-pressure valve to a secondary-sided space of a primary-sided hydraulic oil driven pressure intensifier. A piston displaceably disposed in the medium separator is biased by a return spring in the medium separator, and the pump feeds the hydraulic oil displacing the piston against the restoring force of the return spring for the filling of the secondary space of the pressure intensifier with an operating medium. The operating medium flows from an operating medium-supply container and another back-pressure valve to the secondary side of the medium separator.

REFERENCES:
patent: 2481991 (1949-07-01), Ernst
patent: 2827766 (1958-03-01), Hufford
patent: 3623320 (1971-11-01), Moore
patent: 3977068 (1976-08-01), Krips

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