Stud welding apparatus

Details Stud welding apparatus Stud welding apparatus

1977-12-30

1979-07-03

Truhe, J. V.

Electric heating

Metal heating

For bonding with pressure

B23K 900

Patent

active

041601483

ABSTRACT:
A weldable fastener for supporting insulation adjacent to a surface and apparatus for welding the fastener are provided. The insulation fastener is specifically designed for applying insulating material to the outer surface of a wall of a cryogenic container, which walls are commonly made of aluminum. The fastener includes, in the preferred form, an aluminum stud having a weldable end and a recess at the opposite end. A strong plastic-glass fiber rod, which is preferably made by a pultrusion process, is affixed in the recess of the stud and extends outwardly therefrom, coaxially with the stud. After the insulation is placed over the rod and stud and against the surface, a suitable clip or washer is applied over the end of the rod to hold the insulation in place. The apparatus for welding the stud to the surface includes a stud welding tool which operates by a known end-welding technique. The tool has a chuck leg terminating in an offset member holding a chuck at one side of the tool. The tool also has an offset welding foot which locates a welding ferrule at the one side of the tool and in alignment with the chuck. The chuck has a through passage to enable the rod of the weldable stud to extend past the one side of the tool when the stud is in position in the chuck and ready for welding.

REFERENCES:
patent: 2451152 (1948-10-01), Candy
patent: 3096429 (1963-07-01), Mowry et al.
patent: 3539758 (1970-11-01), Ettinger

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