Apparatus for expanding tubular members

Details Apparatus for expanding tubular members Apparatus for expanding tubular members

1981-01-22

1982-08-10

Gilden, Leon

Metal deforming

By application of fluent medium, or energy field

Using fixed die

29237, 29421R, 72370, B21D 2210

Patent

active

043431704

ABSTRACT:
Apparatus for use in expanding tubes into holes in tubeplates including walls of drums and headers especially in boilers in which an annular body of elastomeric material is compressed axially and expands radially to force the tube into close engagement with the wall of the hole. The elastomeric material is supported at its ends by radially expansible supports each made up of pieces sliding on adjacent pieces, the sliding surfaces being forced together by the applied force, the pieces being located on reduced diameter end portions of the body. The invention enables applied pressures of the order of 70,000 psi (4830 bar) to be used to stress the tubeplate beyond its elastic limit without damage to the body caused by extrusion.

REFERENCES:
patent: 2704104 (1955-03-01), Mueller
patent: 2971556 (1961-02-01), Armstrong et al.
patent: 3200628 (1965-08-01), Polkowski
patent: 4022042 (1977-05-01), Linz
patent: 4152821 (1979-05-01), Scott

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