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  1. #1
    Join Date
    Apr 2013
    Posts
    2

    Default weld 22ga floor patches

    I'm attempting to weld in some 22ga floor patches. I'm using a 135 mig with .023 wire and co2/argon mix. when I attempt to tack the patch I'm burning the patch away. I have the voltage turned all the way down and the speed at about 2 1/2 and I'm working in a overhead position. I would appreciate any tips or comments.
    Thanks

  2. #2

    Default

    try using a backing plate, something other than the material you are welding. Try a piece of aluminumon on the back side of where you are welding. put a weight on it to hold it flat against your surface. This will take some of the heat out of your weld and allow you to weld without burning through.

  3. #3
    Join Date
    Mar 2013
    Location
    Southeast N.M.
    Posts
    8

    Default

    Ceramic works really well as a backing plate too.

  4. #4
    Join Date
    Feb 2012
    Location
    Wa
    Posts
    577

    Default

    How are you adding the patch? Overlaying or cutting and fitting? How large is the patch? Is any of the material rusted? I have done lots of welding on my friends 22g Sheetmetal on his car using .023 and 75/25. Fit up is very important. Gaps make life much harder. I was using my mm180.

  5. #5

    Default

    Stitch weld it.

  6. #6
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,853

    Default

    Fit up is very important on thin material. If your overlapping they need to be tight together. Use tacks instead of trying to run a bead. Tack about every 3/4" then fill in with more tacks. If butt welding you shouldn't have any gaps. Make the patch first then scribe around it & cut out the bad area.

    As was mentioned already a backer of some sort helps a lot also. Aluminum or copper work well. Everything needs to be clean & solid. No half rusted areas.
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  7. #7
    Join Date
    Sep 2012
    Location
    seaford de
    Posts
    406

    Default

    From what I gather your just laying over existing..? Start your tack on the existing metal and bring it to the metal that's burning away

  8. #8
    Join Date
    Apr 2012
    Location
    Western Pa.
    Posts
    228

    Default weld 22ga floor patches

    Yep. Agree with Weldonwelding, start your tack on base metal and or the thicker metal & flow into patch. Same with running bead

  9. #9
    Join Date
    Oct 2005
    Location
    North Central Indiana
    Posts
    782

    Default

    Why can't you use thicker steel for the patch?

  10. #10
    Join Date
    Apr 2010
    Location
    The Peoples Republic of Southern California
    Posts
    80

    Default

    Using a flanger with the hole punch is great for panel replacement
    You punch the holes and plug weld the replacement panel in place where you flanged the original metal it creates a lap joint that fits flush

    But it does not work for all situations pics wold help
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