Device and procedure for hydraulic expansion

Details Device and procedure for hydraulic expansion Device and procedure for hydraulic expansion

2006-04-04

2006-04-04

Oen, William (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

Reexamination Certificate

active

07021150

ABSTRACT:
The invention concerns a hydraulic expansion process for tubes. With this process it is possible to increase the number of hydraulic tube expansions that can be implemented using an expansion device. The hydraulic expansion process in accordance with the invention is highly optimized with regard to control times, pressures and flows. In this process, pressure is produced in the pressure medium with hydraulic oil via a medium separator and a pressure intensifier. In addition, the invention specifies a device for implementing the expansion process and a process for determining the maximum number of hydraulic tube expansions that can be performed with a probe. Finally, the maximum number of expansions is determined taking into account the deformations of the expanded tubes.

REFERENCES:
patent: 5301424 (1994-04-01), Snyder

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