Mandrel for hydraulically expanding a tube into engagement with

Details Mandrel for hydraulically expanding a tube into engagement with Mandrel for hydraulically expanding a tube into engagement with

1978-04-14

1979-07-03

Larson, Lowell A.

Metal working

Means to assemble or disassemble

Heat exchanger

33302, 72 21, 73 498, B23P 1526

Patent

active

041595645

ABSTRACT:
A mandrel for hydraulically expanding tubes into engagement with a tubesheet, the body of the mandrel being coated with an electrically isolating impermeable membrane and having an eddy current coil adjacent the leading end thereof, the tube into which the mandrel is placed and the body of the mandrel serving as leads for operating the eddy current coil in order to determine when the leading end of the mandrel is adjacent the inner edge of the tubesheet and a mandrel having a portion formed from wire rope so that the mandrel is flexible and can fit into a tube adjacent a hemispherical head.

REFERENCES:
patent: 2460580 (1949-02-01), Huber
patent: 2779279 (1957-01-01), Maiwurm
patent: 3376941 (1968-04-01), Fitch et al.
patent: 3705506 (1972-12-01), Clavin et al.
patent: 3803901 (1974-04-01), McConnell et al.

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