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Oxy Welding Patch Panels in 32 Ford

Discussion in 'The Hokey Ass Message Board' started by scotti32, Nov 10, 2013.

  1. scotti32
    Joined: Jul 13, 2009
    Posts: 284

    scotti32
    Member

    Hi guys,
    Question for Oxy welding experts.

    I have been welding with Oxy for about 6 years, went to a night college course to learn and have done a few repairs on old Ford bodies and new steel. I have a Henrob/Dillon/Cobra oxy torch.

    The problem I am having is when welding rust repair patches into a 32 Ford body I am repairing. I make sure metal is clean and make sure get good penetration with welds and take my time, to not get too much heat in the metal. The weld looks ok, but then when hammering and cleaning up, some of the weld joint falls out like slag. Does not happen with new metal. Is it just old Ford bodies with the old steel and inconsistent properties or am I doing something wrong?

    Can use my mig, but would rather use oxy.
    Hope someone can give some advice.
    Thanks
     
  2. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,861

    Mr48chev
    ALLIANCE MEMBER

    i've had that happen because I didn't have my torch adjusted right. I'd go and practice on some scrap sheet metal and make some adjustments so that I got it working the way I wanted it to. I have a mig now but have always welded sheet metal with my torch and my top was welded on with a torch 31 years ago and the welds are still ok.
     
  3. scotti32
    Joined: Jul 13, 2009
    Posts: 284

    scotti32
    Member

    Too much oxygen in the mix maybe?
     
  4. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,861

    Mr48chev
    ALLIANCE MEMBER

    That's what I am thinking that you have too much oxygen to acetylene or too much pressure but hopefully one of the guys who has used that torch quite a bit will chime in and give you some detailed info.
     

  5. redroaddog
    Joined: Apr 1, 2011
    Posts: 348

    redroaddog
    Member

    really sounds like you are drawing some impurities into your weld from the back side of the old ford metal. could be torch setup but if its good on new steel its probably fine:D
     
  6. PushnFords
    Joined: Dec 2, 2011
    Posts: 52

    PushnFords
    Member

    I cut a piece out of an unknown frame once to patch a T frame and ran into similar problems. The weld looked fine but if I flexed the rail the patch would crack along the weld. Tried different things....ended up cutting it out & getting a different piece to use as a patch & it was fine. I think it was just impurities in the metal.
     
  7. fleet-master
    Joined: Sep 29, 2010
    Posts: 1,780

    fleet-master
    Member

    sounds like there could be impurities in the weld. check the backside for old underseal etc and if poss, scrape it away from the join areas.
    Have a look at my thread linked below ...I've oxy butt welded new sections into my F1 cab and theres a few pics of the backside of the welds. It might be a help for you to gauge how weld penetration should look ?
     
    Last edited: Nov 11, 2013
  8. scotti32
    Joined: Jul 13, 2009
    Posts: 284

    scotti32
    Member

    The body has been blasted and etch primed. I clean off the primer on areas to weld patched. So not really any old gunk. I did some repair on the dash and it went perfect. Just rust repairs on body I am having problems with. I will make sure before i start that the flame mix is good.
     
  9. rcnut223
    Joined: Oct 12, 2006
    Posts: 1,275

    rcnut223
    Member
    from wisconsin

    What filler rod are you using? I have had that issue with poor quality rod
    Actually coat hangers






    Posted using the Full Custom H.A.M.B. App!
     
  10. rcnut223
    Joined: Oct 12, 2006
    Posts: 1,275

    rcnut223
    Member
    from wisconsin

    I also agree with the too much oxygen statement




    Posted using the Full Custom H.A.M.B. App!
     
  11. ems customer service
    Joined: Nov 15, 2006
    Posts: 2,634

    ems customer service
    Member

    a similar condition exists when metal is fatigued
     
  12. stimpy
    Joined: Apr 16, 2006
    Posts: 3,546

    stimpy

    sounds like too much oxygen and your oxidizing the metal lots of that older steel has a real high carbon content in it and the newer stuff I am seeing is low carbon . if it sparks like a sparkler the metal is fatigued .
     
  13. WDobos
    Joined: Jan 7, 2007
    Posts: 234

    WDobos
    Member

    One bad problem I see with most people is they have way too much pressure at the torch. Adjust your pressure to the lowest setting and that should help with your welds and also save you money
     

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