Automatic pulse plasma welding method and apparatus for...

Details Automatic pulse plasma welding method and apparatus for... Automatic pulse plasma welding method and apparatus for...

2006-11-21

2006-11-21

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S121450, C219S121560, C219S13700R

Reexamination Certificate

active

07138600

ABSTRACT:
Disclosed herein is an automatic pulse plasma welding method and apparatus for forming a lap joint between membrane sheets, which applies plasma welding to a lap joint between membrane sheets to improve working efficiency and productivity, and which provides optimal welding conditions to the respective regions of the lap joint between membrane sheets to improve welding quality. In the present invention, each of corrugated parts of a lap joint between membrane sheets having flat parts and the corrugated parts is divided into a plurality of regions, optimal welding conditions are provided to each of the regions, a corrugated part is sensed by a photo sensor to improve sensitivities of two touch sensors, a θ axis of a welding torch moves by a difference value between outputs of the two touch sensors, the angle of the welding torch at each of the corrugated parts is recognized by output voltage values of a potentiometer mounted on the θ axis of the welding torch, and if a detection voltage corresponding to each of the regions is recognized, welding conditions of a corresponding region are varied/set to an optimal welding condition, thus enabling the lap joint between membrane sheets to be pulse plasma welded.

REFERENCES:
patent: 4837418 (1989-06-01), Modglin
patent: 5611944 (1997-03-01), Gilkinson et al.
patent: 6249718 (2001-06-01), Gilliland et al.
patent: 6772040 (2004-08-01), Picard et al.

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