Welding current turned on gradually. Current increased gradually over short distance until full operating current reached, and welding proceeds in "keyhole" mode. Tests in laboratory and in production show gradual-turn-on technique 100 percent reliable.
Starting VPPA Welds Without Pilot Holes
NASA Tech Briefs ; 12 , 8
1988-09-01
Miscellaneous
No indication
English
Effects Of Heat Sinks On VPPA Welds
NTRS | 1991
|Properties of VPPA-Welded 2219-T87 Aluminum
NTRS | 1986
|Evaluation of Mathematical Models of VPPA Welding
Online Contents | 1994
Evaluation Of Mathematical Models Of VPPA Welding
NTRS | 1994
|Shutter For VPPA-Welding Vision System
NTRS | 1989
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