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I've got a bit of a problem when doing fillet welds (generally with 1/8- 5/16" mild-steel bar, plate, etc).I get a lot of pops if I try to keep my inner flame (cone) 1/8" from the material. It seems like the 'corner' into which I'm putting the flame and making my puddle throws the heat back onto the tip - then I'll get a pop every so often.FYI, I try to maintain a tip-to-seam angle of 35 - 45 degrees and not let the tip sit anywhere near straight up from the seam. And I'm welding with a well-tuned neutral flame, using the working pressures that Victor recommends for the tip size I'm using at the time.Anyhow, if I back the cone away, the rate of puddling slows down and the bead gets sloppy and wide. If I increase the gas flow at the torch handle valves, I can avoid more pops - but the flame (even though neutral) will tend to burn holes in the steel too readily. Especially at the end of the bead or pass where the parent material ends.Your advice requested.
Reply:When you say torch angle I think you are refering to your angle in realtion to the joint angle. For example if you are welding a 90 degree joint your angle would be about half that? If thats the case, my question is what's your torch inclination? (angle relative to the direction of travel) Most welding tips have a built in angle so that if your torch handle is parallel to the work that should be a good starting point. If your inclination is too "straight in" that could be causing your problem. Clear as mud?
Reply:You're overheating the tip. Turn up the gas flow rate.
Reply:Originally Posted by jayj8When you say torch angle I think you are refering to your angle in realtion to the joint angle. For example if you are welding a 90 degree joint your angle would be about half that? If thats the case, my question is what's your torch inclination? (angle relative to the direction of travel) Most welding tips have a built in angle so that if your torch handle is parallel to the work that should be a good starting point. If your inclination is too "straight in" that could be causing your problem. Clear as mud?
Reply:Originally Posted by 76GMC1500You're overheating the tip. Turn up the gas flow rate.
Reply:To set proper flow rate for any tip, light with acetylene only, and open the gas valve until the gas only flame quits smoking, then add oxygen until you achieve a neutral flame. This is the only sure way of getting the exact flow rate for a tip.
Reply:Are you making sure your tip is really good and clean and the hole is not out of round? I'm sure you probably would have thought of that but sometimes it's the simplest thing you forget to check so I thought i would mention it.
Reply:Originally Posted by Joel_BCYeah, I believe you. Except when I turn the gas flow rate up (at the torch valves) - and, again, make sure it's adjusted to a neutral flame - I get rid of the popping but have more of a tendency to burn holes in the work.
Reply:Also to help with the burning throught problem you could add a little more filler as well as of moving a little faster as Oldiron2 suggested. Don't know how much you are using but every time you add filler it cools the weld zone a little.
Reply:When I am on the inside of an angle or corner I always move down a tip size. In those cases I make an effort to design the build so that I can do the welds on the outside of the angle if at all possible - it is just so much easier to control the puddle.Hobart LX235Victor 250 Oxy-Acetylene Rig (welding and cutting)Bobcat 773F-350, 1999, 4x4, 16' 10K# trailerOutdoor Wood Burner - 10 cords/year |
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发表于 2021-8-31 23:30:37