Im a Newbie in both ways "site and welding" , I own a auto repair shop and have always repaired and fixed some bent wheels, lately the guy that welded them for me is just to busy so here I am. I bought a 190 Hobart with spool gun and have welded a few fine but occasionally sometimes I weld one it almost like it just runs from one side you are welding , I know the difference between forged and cast, learned that quickly when straightening them. Is preheating aluminum a necessity , also someone told me about using a piece of cooper under the weld, I don"t get this. Could you guys drop me some tips. Using straight Argon and aluminum wire. Thanks for all the info you guy's can share.
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Aluminum Wheel Welding