Method and apparatus for initiating welding arc using plasma...

Details Method and apparatus for initiating welding arc using plasma... Method and apparatus for initiating welding arc using plasma...

H - Electricity

05

H

H05H 1/34 (2006.01) B23K 9/067 (2006.01) B23K 9/167 (2006.01) B23K 10/00 (2006.01)

Patent

CA 2454809

Methods and apparatus for initiating a welding arc by directing a plasma jet into the space between the tip of the welding electrode and the workpiece. This is done while an electrical potential is applied between the electrode and the workpiece. The ionized plasma gas renders the space between the electrode and the workpiece more conductive, thereby reducing the voltage threshold needed to initiate an arc between the electrode and the workpiece. When the voltage threshold reaches the level of the applied electrical potential, the arc will be initiated.

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