Thread: Metal warping

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i weld with i bit thicker wire i do is alot just lazy ? but it works better for me . i like to butt up my patch panels.and not over lap this lets me work the weld with a hammer and dolly if needed the better the fit up the better the repair . if i have to weld up holes bigger then 1/4 or so i make up plugs out of steel if . i like to use the mig and set it up for tack welds i like the tacks about 1/8 big or so around. i hop a round alot just tacking the panel in. i get the tack welds about 1/2 in space or less still hopping around and keep it cool then i grind the top off the welds down . this keeps from a cold weld a pile up. when you start and stop then i go and weld about 1/2 of the space up between the tacks welds still hopping around never welding more then the 1/2 in one spot. keeping the panel cool and then grind welds flat i never grind much down at one time. this will put heat into the repair to . i use the grinding wheel to knock the weld down . i think put less heat in the panel then a sanding disc the paper will brake down and you will be rubbing more to take the weld down putting more heat on the repair when all welds are a most level i use sanding disc keeping the disc speed down so not to over speed the disc and knocking the grit off that will put more heat in the job and keep the disc sharp