Method and apparatus for forming heat exchanger tubes

Details Method and apparatus for forming heat exchanger tubes Method and apparatus for forming heat exchanger tubes

1984-08-09

1986-06-17

Godici, Nicholas P.

Metal fusion bonding

With means to deform work, filler, or flux portion before...

Comprising means forming one-piece blank into a tubular shape

72181, B23K 3106

Patent

active

045951357

ABSTRACT:
A tube mill for forming heat exchanger coolant tubes has a series of form rolls for rolling flat strip stock into a flat-sided tube with rounded longitudinal free edge portions. After rolling, the free edge portions are heated to a fusion temperature and pressed together between a pair of squeeze rolls to form a weld seam therebetween. The heating is performed by a high frequency induction coil which encircles both the tube and a guide for the free edge portions. The guide is located immediately upstream from the squeeze rolls.

REFERENCES:
patent: 1420042 (1922-06-01), Kritz
patent: 2821772 (1958-02-01), Billetter
patent: 3452424 (1969-07-01), Morris
patent: 3755884 (1973-09-01), Dupy
patent: 4142663 (1979-03-01), Blatnik

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