Method to control starting and stopping a plasma arc welding key

Details Method to control starting and stopping a plasma arc welding key Method to control starting and stopping a plasma arc welding key

1998-07-08

1999-06-22

Paschall, Mark

Electric heating

Metal heating

By arc

21912148, 219 591, 219 60A, B23K 1000

Patent

active

059140585

ABSTRACT:
An improved plasma arc welding arm method and apparatus for keyhole welding rotating workpieces has an arcuate gear track supporting a corresponding arcuate geared cart bearing a plasma arc welding torch prevents voids in keyhole weld starts and finishes. The gear track is mounted on a manipulator arm for positioning the welding torch in proximity to a rotating workpiece to be welded. The torch may be rotated on the cart and gear track in the same direction and at the same rotational speed as the workpiece.

REFERENCES:
patent: 4023006 (1977-05-01), West et al.
patent: 4145593 (1979-03-01), Merrick et al.
patent: 4371775 (1983-02-01), Mihara et al.
patent: 5225654 (1993-07-01), Harwig et al.
patent: 5685996 (1997-11-01), Ricci

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