System for Control of Weld Arc Development.
Patent, Filed 20 Sep 89, patented 4 Dec 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
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The present invention is a system and method for welding, wherein a weld beam or arc is electromagnetically deflected in a predetermined geometrical path. Isotherms lines of constant temperature are sensed and identified in the weld pool produced by the arc. The system and method of the present invention can be used to provide the maximum flexibility in producing weld pools and in adapting these pools to weld dissimilar metals. By electromagnetically deflecting the weld arc, the deflection can be accomplished more rapidly and without the limitations which are associated with the mechanical deflection of the entire welding torch. Using electromagnetic deflection, there are no moving parts. The arc can be readily deflected not only according to predetermined positional patterns but also in accordance with predetermined velocities. Thus, when dissimilar metals are being welded, the method easily lends itself to compensating for the different heating and cooling characteristics of the individual metals by controlling not only the pattern described by the arc but the rate at which the arc travels around the pattern.
- Fabrication Metallurgy