NASA NTRS · 19900000128
Quick Check Of Butt-Weld Alignment
Abstract
Proposed tool measures alignments of plates before butt-welded. Provides nearly instantaneous check on alignment, thereby facilitating repetitive measurements along length of weld joint. Reduces risk of contamination of weld from dirty measuring tools. Middle photodetector indicates acceptable alignment when position of transmitter fiber preciously matches that of center receiver fiber. If plates offset, other photodetectors signal misalignment.
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Smith, Matthew A.. 1990-03-01. Quick Check Of Butt-Weld Alignment. https://ntrs.nasa.gov/citations/19900000128
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