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I've been trying to finish up a few projects on my car and there are a few things I would like to fix or beef up, but I only have access to from below. I tried running some beads this way but the filler just seems to drip out without penetrating at all. I might get some spatter to stick, but I know its not doing anything structural. I'm using a HF 120 amp machine on mild steel. I've been using the 75 amp setting so far(1/8" steel plate) the next lowest setting is 50 amp. I'm using solid core and C25 too if it matters.
Reply:upside down is a tough deal no doubtit all a matter of practice..i know you dont want to practice on your carso get some mat thats close to what you have and try it on that firstclean clean clean is a must!!sometimes short 1" welds are easier to do that 1 long one....just keep skipping around so you dont build up too much heat in one place...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:If you can, drag a grinding disc along the seam to create a groove to weld into. Don't expect to get any great amount of penetration. Instead grind out a groove or bevel the edges before assembling. I don't reduce my heat much with solid wire but I do increase my travel speed and concentrate on making small stringer beads running the length of the groove. Check your nozzle after every pass because spatter does build up inside. If I am doing a corner joint overhead it is much easier because the surface tension of the puddle clings to the sides of the joint. If you create a groove to weld into it is much easier than putting a weld bead on the underside of a flat surface. |
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发表于 2021-9-1 01:00:06