Large diameter stud welding and method and apparatus for...

Details Large diameter stud welding and method and apparatus for... Large diameter stud welding and method and apparatus for...

B - Operations, Transporting

23

K

327/56

B23K 9/20 (2006.01) B23K 9/08 (2006.01) B23K 35/02 (2006.01) B23K 37/04 (2006.01)

Patent

CA 1241705

ABSTRACT OF THE DISCLOSURE A large diameter stud and a method and apparatus for welding same are provided. The large diameter stud has a protruding tip at a weldable end thereof containing a solid rod-like body of flux. A ceramic ferrule which can have a two-step cavity surrounds the weldable end portion of the stud when engaged with the work- piece to which it is to be welded. An arc blow coil surrounds the ferrule and is spaced therefrom with powdered flux there- between and above the ferrule. The arc blow coil is attached to adjustable legs of a welding tool and has a weight thereon to aid in supporting the welding tool upright on the workpiece during the welding operation. In the welding cycle, a relatively low weld current is used for the main welding arc and is maintained for an extending period of time. Current through the arc blow coil is initiated when the welding cycle begins and is gradually increased to a maximum at an intermediate point in the welding cycle.

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