Method and apparatus for forming a heat exchanger turbulator and

Details Method and apparatus for forming a heat exchanger turbulator and Method and apparatus for forming a heat exchanger turbulator and

1986-10-01

1988-08-09

Bray, W. Donald

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72 61, 72323, 72370, 264573, B21D 3920

Patent

active

047619821

ABSTRACT:
Method and apparatus therefor for forming an inner tube and turbulator for a concentric tube heat exchanger from a stock length of tube comprising the steps of simultaneously mechanically forming a bell-shaped sealing and outer tube attaching section in the ends of the tube while also sealing the ends, applying hydraulic pressure to the interior of the tube to form outwardly projecting turbulator bumps in the tube at places located about and along the length thereof, and increasing the mechanical forming force with increasing hydraforming force so that the latter opposes the former and only their net force acts on the bell-shaped sections to maintain the sealing during the hydraforming to prevent coining of these sections.

REFERENCES:
patent: 2465677 (1949-03-01), Deverall
patent: 3394569 (1968-07-01), Smith
patent: 4317348 (1982-03-01), Halene et al.

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