Flexible hydraulic expansion mandrel

Details Flexible hydraulic expansion mandrel Flexible hydraulic expansion mandrel

1994-03-16

1995-02-28

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

B21D 2602

Patent

active

053926269

ABSTRACT:
A flexible mandrel for expanding a tube in a tubesheet comprises a length of flexible wire which is placed within a tube. A hydraulic seal is located at each end of the length of flexible wire for sealing a section of the tube and is connected to the flexible wire by a connector. A fluid inlet is provided at the rear end of the mandrel for providing fluid to the mandrel between the sealed section of the tube.

REFERENCES:
patent: 1930745 (1933-10-01), Fisher
patent: 2966740 (1961-01-01), Macha et al.
patent: 4195390 (1980-04-01), Amen
patent: 4513497 (1985-04-01), Finch
patent: 4951492 (1990-08-01), Vogt

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