Apparatus for welding pins to a tube interior

Details Apparatus for welding pins to a tube interior Apparatus for welding pins to a tube interior

1978-10-04

1980-12-23

Goldberg, E. A.

Electric heating

Metal heating

Work holders

219 98, 219158, B23K 920, B23K 932

Patent

active

042412870

ABSTRACT:
The disclosure relates to a tube with surface-enlarging elements attached to the inside thereof, which elements are in the form of radially inwardly directed pins welded on the tube wall. A method and apparatus for forming such a tube are also provided, the apparatus comprising a holder for each pin which is movable both longitudinally and radially of the tube.

REFERENCES:
patent: 1101858 (1914-06-01), Lachman
patent: 1720244 (1929-07-01), Smith
patent: 1857338 (1932-05-01), Sjolander
patent: 1929444 (1933-10-01), Murray
patent: 2208676 (1940-07-01), Kosham
patent: 2473633 (1949-06-01), Brown
patent: 2873354 (1959-02-01), Shoup
patent: 3299248 (1967-01-01), Myer

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