Electric heating – Metal heating – By arc
Patent
1993-02-25
1994-12-13
Shaw, Clifford C.
Electric heating
Metal heating
By arc
219 75, 219136, B23K 9167
Patent
active
053731395
ABSTRACT:
Narrow groove welding is practiced using conventional welding apparatus including a torch block supporting an electrode and a primary, circular gas cup which directs a first flow of cover gas along the electrode, in combination with a rectangular, secondary gas cup detachably mounted coaxially with the primary gas cup and which directs a second, greater flow of cover gas around the flow of cover gas from the primary gas cup. The broad envelope of laminar flow cover gas thus produced is effective for making deep narrow groove welds and is stable enough for completing the weld cap.
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D. J. Hsrch, PE; Narrow Groove Welding and Weld Monitoring with Adjustable Regionalized Filtration; EPRI BWR Reactor Vessel & Inspection & Repair Workshop 16-18 Jul. 1991; pp. 1-8 and FIGS. 1A thru 5B.
Burgoon Charles E.
Camellino Roger A.
Shaw Clifford C.
Westinghouse Electric Corporation
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