Electric heating – Metal heating – Of cylinders
Patent
1986-08-11
1987-08-18
Godici, Nicholas P.
Electric heating
Metal heating
Of cylinders
228219, B23K 1300
Patent
active
046878920
ABSTRACT:
A method and apparatus is disclosed for purging air from multiple surfaces of members to be welded together. The apparatus includes a hood with the inert gas entering the hood at about 150 cubic feet per minute at between 2-5 pounds per square inch gauge when handling approximately 21/2 inch diameter tubes. The gas is first evenly spread in the hood to fill the entire cross sectional area thereof and is then moved through a straightening section to provide laminar flow of the gas across the multiple surfaces. An induction coil is moved between hood closure means into the hood to heat the weldable surfaces to a bonding temperature and after the coils have been removed from the hood, the members are urged together to upset the heated surfaces to weld the two members together.
REFERENCES:
patent: 2542393 (1951-02-01), Chapman
patent: 2805316 (1957-09-01), Chapman
patent: 2819517 (1958-01-01), Pursell
patent: 2892914 (1959-06-01), Rudd
patent: 2919335 (1959-12-01), Shaughnessy
An article entitled: Pressure Butt Welding of Steel Pipe Using Induction Heating by S. G. Harris in Welding Research Supplement dated Feb. 86 (8 pages).
Brolin Charles A.
Jennerjohn Dennis A.
Moeller Richard E.
FMC Corporation
Godici Nicholas P.
Kamp Ronald C.
Megley Richard B.
Moore Alan J.
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