Metal fusion bonding – Process – Plural heat applying
Patent
1984-11-23
1986-04-29
Godici, Nicholas P.
Metal fusion bonding
Process
Plural heat applying
228241, B23K 2300
Patent
active
045851581
ABSTRACT:
A method of welding using a preheating insert is disclosed. The method includes the steps of positioning and igniting a combustible solid fuel mixture within a pipe to preheat the pipe by convection to a proper temperature and welding the pipe. The preferred and illustrated embodiment incorporates an encircling bottom support having a centralized hollow tube. It is made of a frangible material to be easily broken should it fall into the pipe. It supports a hollow, cylindrical, combustible heating element. The heating element is made of thermite as an example. It includes a top located deflector plate to deflect hot gases flowing upwardly from combustion against the wall of a pipe to be heated. The apparatus is concentrically located within the pipe in the vicinity of the pipe section to be heated.
REFERENCES:
patent: 896070 (1908-08-01), Williams
patent: 1544015 (1925-06-01), Lamy
patent: 2286075 (1942-06-01), Evans
patent: 2569956 (1951-10-01), Schiltknecht
patent: 2650539 (1953-09-01), Greene
patent: 4001152 (1977-01-01), Leonhardt
J. C. McCaig, Bonding and Joining Technology, Exothermic Brazing Units, U.S.G.P.O. 1974, p. 12.
Cuda Carmine
Godici Nicholas P.
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