Electric heating – Metal heating – By arc
Reexamination Certificate
2005-12-13
2005-12-13
Shaw, Clifford C. (Department: 1725)
Electric heating
Metal heating
By arc
C219S130400, C219S1370PS
Reexamination Certificate
active
06974932
ABSTRACT:
A method and apparatus for welding include initiating a pulse welding process includes initiating a welding arc by providing CC type welding power, maintaining the arc by providing CV type power. Then, pulse type welding power is provided. The method and system can be used to start short circuit, or other welding processes by providing short circuit power, or welding power of a given mode, instead of providing pulse power. Also, in one alternative, a method and system of initiating a pulse, short circuit, or given welding process includes initiating a welding arc by providing CC type welding power at least until a pseudo-equilibrium for the arc is established. Then, providing welding power in a pulse, short circuit, or the given mode.
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Davidson Robert R.
Holverson Todd E.
Hutchison Richard M.
Uecker James L.
Corrigan George R.
Illinois Tool Works Inc.
Shaw Clifford C.
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