welding upside down
Hello, trouble on the bottom
Well fisrt of all don't feel bad if your, out of position welds don't look good the first few hundred times. This is a skill that does not happen overnight I have been welding for ten years in the Alberta oil field and I still have bad days. Any way here are a few tips. First of all making a good weld is all about being comfortable. Find a position that works for you and like a lot of people have said wear the right safety gear. If you are worried the whole time about burning yourself you will not be thinking about your weld. Second to make a good weld you need to see your weld puddle make sure you have clean lenses and the right shade of lens. Next like some have already said clean the area to be welded (remove oil paint and rust). 90% of a good weld takes place before you even strike an arc. Now you are ready to start welding. In a few of the posts people sudjested to weld cold and fast, well this might not be the right way of putting it, if you weld to fast and to cold you will get what we call cold lap or lack of fusion. More important than a nice looking weld is a sound weld looks will come with time. If you are welding very thin material that will not take much heat, without melting you want to use a push tecnique, ie. push the weld puddle. If you are welding thicker material you can use a pull tecnique. You will notice that in overhead welding gravity is not your friend, so like others have said you want to keep your weld puddle as small as possible and do multi passes if you need a larger weld. When welding out of possition think about which way gravity will pull your molten puddle and adjust your gun angle accordingly. If you have two diffrent thicknesses of metel focus your heat on the thicker piece because it will take more heat before melting. As for your weave tecnique there are a number of options, you can find them online at millerweld.com or Lincolin. The one thing to remember when you are weaving, where you point your mig wire you will deposit metel. Duh you say no doubt. So when you are weaving pause at your edges until you see the weld puddle tie in with the parent metel and go faster over the middle so you don't deposit as much weld material in the middle(because you pass over the middle twice as much as the edges). I hope that helps a little and hey remember you won't get good over night. When the weld starts to get out of hand, STOP, grind off the lump and continue welding. Goodluck and if you have any other questions send me an email I will be happy to answer.
For those of you who have tasted the taste of burning ear canel we salut you.
Pipliners and pressure welders do it in all positions.