Process of ultrasonically soldering drawn aluminum tubing produc

Details Process of ultrasonically soldering drawn aluminum tubing produc Process of ultrasonically soldering drawn aluminum tubing produc

1980-09-02

1982-04-27

Combs, Ervin M.

Metal fusion bonding

Process

Using high frequency vibratory energy

228183, 228262, B23K 106, B23K 3106

Patent

active

043266622

ABSTRACT:
The ultrasonic soldering of continuously drawn coilable aluminum tube to provide soldered socket joints is improved where the tube, after continuous and sequential drawing to produce a work hardened tube, is subjected to a burnishing operation by being drawn through a burnishing die. The burnishing operation differs from the drawing operation used to produce the continuously drawn tube in that the burnishing does not substantially alter the wall thickness of the tube. The burnishing dies condition the outer tube surface to be more wettable by molten solder metal in fluxless ultrasonic soldering processes.

REFERENCES:
patent: 2254853 (1941-09-01), Mouromtseff et al.
patent: 2824818 (1958-02-01), Swenson
patent: 3218693 (1965-11-01), Allen et al.
patent: 3633266 (1972-01-01), Taylor
patent: 3680200 (1972-08-01), Terrill et al.
patent: 4172548 (1979-10-01), Nakamura
Fluxless Soldering of Aluminum Heat Exchangers, W. B. Jenkins, Welding Journal, Jan. 1976, pp. 28-35.

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