kidney bean repair

#1
i needed to take a break from writing code for the electronic system
so here's what i did today:

a while back rayvel shipped me out two cast aluminum bonanza
kidney bean wheels that had chucks removed. i filled in the
missing chunks with aluminum wire that the mighty mig welder
deposited. the first layers where from when the mig was set up wrong
so the weld build up was/is festooned with voids and fissures. the
upper layers were a little bit better. after filling the chunk in i mounted
the half on the lathe and began to turn down the weld fill in. not pretty
yet but its getting there. i will probably finish cutting on the lathe and
then add another layer of weld then do a finish cut. here it is when i
was cutting the weld fill in:

hub.jpg

not pretty but it was a fun break from writing microprocessor code.

looks like a better way to fix these hubs would be to fit a chunk of
aluminum to the hub, mig it, then turn it instead of using wire as
a filler material. or fill it in with a tig??

back to writing code in the morning.

:thumbsup::grind:
 
#6
Your doing a good job but you should of knocked off the first layer of bad welds but your past that point now. I'd die grind the voids and fill with weld. You'll most likely be doing that several times since your using a spool gun. You would benefit from a TIG welder but if you don't have access to one....

You'll notice with aluminum that you'll get cold starts and the weld heats up fast. Start next to the void and weld into it. When you stop hold the nozzle at the end of the weld and let the argon come out to allow cooling and a clean atmosphere to prevent a crater. When I stop welding I would hold the trigger to allow gas to come out for a few seconds then pull the trigger and put a small tack weld to fill in the crater. You should have a fairly long wire stick out and not be holding the gun at a severe angle only maybe 5 degrees. Hope this helps, Nate
 
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