Simple modification yields welds of better quality. Reed valve halves fluctuations in pressure in back-purge chamber attached to workpiece undergoing keyhole plasma arc welding. Identical to one used in fuel system of two-cycle gasoline engine. Backbead smoother, and weld penetrates more uniformly.
Reed Valve Regulates Welding Back-Purge Pressure
NASA Tech Briefs ; 15 , 7
1991-07-01
Miscellaneous
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English