vertical uphill weld(mig)
vertical uphill weld(mig)
(OP)
I am preparing for an aws cert. and wonder if anyone has any tips on doing a vertical uphill weld with a mig and exactly what the test pad looks like. typhoondarren@yahoo.com
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RE: vertical uphill weld(mig)
When welding uphill (3G or 3F position), I push inward and upward at the center of the weld, then backtrack and weave left to right. I keep repeating this process until the weld area is completely filled.
Practice a lot...particularly if radiography will be used for your test. It will show up all the slag and porosity that poor technique tend to trap. For bend testing, slag and porosity will still show but your are more likely to get by with it in the bend test than with radiography.
Good luck.
Ron
RE: vertical uphill weld(mig)
RE: vertical uphill weld(mig)
I suggest practicing on tee joints making fillet welds. Up to a point, the faster you move across the center, the flatter your bead will be. You may have to start out making rather large beads to get the hang of it.
Usually, GMAW isn't used much for out of position work. I think that it has its place and if propery applied, works well.