Electric heating – Metal heating – Of cylinders
Patent
1977-05-19
1979-09-18
Goldberg, E. A.
Electric heating
Metal heating
Of cylinders
21912512, 2191305, 21913741, B23K 902
Patent
active
041684060
ABSTRACT:
A machine for automatic weld of abutting pipes or accessories for ducts, or generally of circular solids, by the TIG or PLASMA process, with or without weld metal, comprising a control unit for programming the weld parameters according to cycles suitable to the different types of welds, and a stationary body which can be tightened on the pipes to be welded, supporting a welding torch capable of performing a multiplicity of revolutions about the pieces to be welded, comprising means for tightening said machine on the ends of the pipes to be welded, comprising an element fixed to the body of the machine, and an element movable with respect to the stationary element; means for positioning the welding torch with respect to the ends of the pipes to be welded; means for rotating in a controlled way said torch with respect to the ends of the pipes to be welded, so as to render possible to change several times, even during the same revolution, besides between one revolution and the next one, the welding parameters (speed, current, distances and so on) according to a cycle which can be programmed; means for imparting a to and fro movement to said torch perpendicularly to the weld bead; means for controlling and adjusting the distance between said torch and the pipes to be welded; means for transferring fluids from the stationary part to the rotating part of said torch; means for supplying electric power from said stationary part to said torch; means for feeding weld metal in correspondence with the welding zone.
REFERENCES:
patent: 3267251 (1966-08-01), Anderson
patent: 3299245 (1967-01-01), Tinnes
patent: 3461265 (1969-08-01), Spiro
patent: 3555239 (1971-01-01), Kerth
patent: 3715560 (1973-02-01), Emmerson
patent: 3737614 (1973-06-01), Paulange
patent: 3805011 (1974-04-01), Knaefel
patent: 4038509 (1977-07-01), Henderson
Allgemeine Patentverwertungs Anstalt
Goldberg E. A.
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