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how to spot weld aluminum with an arc welder?

i have a small hole in the bottom of my but how do i spot weld it with a arc welder stick welderi know you have to clean it very well iam not trying to run a bead just a small spot weld bit iam using a stick welder not a wire feed welder.i bought aluminum welding rods 1/8 in they didnt have any 1/16

Answer:

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first off clean ,clean, cleanAny impurities will make a hard job even harderSecond preheat the base aluminum to a good warm tempnot too hot though or you will warp the metal around the holemake sure the rods are dry and have no moisture at all absorbed in the fluxset the amperage low , somewhere around 60 - 80 ampsstriking the ark and getting it to hold will be a little difficultIf the base metal is thin, then a continuous weld is out of the question for a noviceinstead, do like you were talking about and build up a few spot welds on top of and around each other until the hole is sealed upstick welding aluminum is a very tricky and hard task to master, so take your time and try not to loose your patienceremember once aluminum starts to go molten it likes to fall out very quickly leaving a bigger hole than what you started withoh yes, one last thing, make sure the rods you're using are the right rods for your welder AC rods for AC welder or DC rods for a DC welder.

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