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  1. #1
    Join Date
    Sep 2008
    Location
    southwestern ohio
    Posts
    272

    Default Welding 7/16 steel

    We recently started using Mo-Clamp's Full Frame Anchoring System http://www.moclamp.com/4070hpage.html.

    As seen in this photo the pinchweld clamp does not hold the thick mouunting flange well because they are designed to clamp steet metal not thick steel.
    mo%u00252520clamp%2520tie%2520down.jpg

    moclamp.jpg

    My proposed solution is to weld a larger piece of steel to the mounting flange so that it may be directly bolted to the clamping plate.
    modification.png
    The problem is that the flange is about 7/16" it may be closer to 3/8" or 1/2" I haven't measured the thickness of it but it is in that range. I know that stick welding is going to be the best way to go about this, but since this is in a body shop we are not equipped to make this weld.

    Our machine shop has Precision TIG 225, but I do not know if they have the stringer for SMAW.

    At home we have an Airco 180 amp AC only welder.

    Can the Airco welder make this weld-assuming worst case scenario full 1/2".

    What size 7018 rod should be used in this case-I plan to v groove both sides of the weld and make multiple passes. Am I correct in remembering that there is a 7018 AC rod?
    This is an automotive discussion forum that has some great infromation

    www.autobodytoolmart.com/shoptalk

  2. #2
    Join Date
    Oct 2006
    Posts
    642

    Default

    Cannot help you with the rest of your question but I do know they make 7018 AC electrodes ....

    http://www.tractorsupply.com/hobart-...-1-lb--3896214

    I know my son is working on welding 1/2" steel in school and they are using 1/8" 7018 rod.

    He brought some pieces home to practice on and his instructor said to use 1/8" 7018 and it is definitely multi pass welding.

  3. #3
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,868

    Default

    Don't over think it.
    Your options are
    1- stick weld it with the Lincoln.
    2- If it doesn't have a stinger then take the one from the Airco.
    3- If you can't do that then tig weld it with the Lincoln.
    4- Stick weld it with the Airco using 5/32 or 1/8 7018ac rods.
    5- Tack it up & take it to a welder.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

  4. #4
    Join Date
    Sep 2008
    Location
    southwestern ohio
    Posts
    272

    Default

    Will the older airco cable connectors, just a straight copper plug about 5/16" in diameter, work in the precision tig?
    This is an automotive discussion forum that has some great infromation

    www.autobodytoolmart.com/shoptalk

  5. #5
    Join Date
    Sep 2005
    Location
    northern NJ
    Posts
    1,868

    Default

    Quote Originally Posted by metalmeltr View Post
    Will the older airco cable connectors, just a straight copper plug about 5/16" in diameter, work in the precision tig?
    Probably not.
    MM250
    Trailblazer 250g
    22a feeder
    Lincoln ac/dc 225
    Victor O/A
    MM200 black face
    Whitney 30 ton hydraulic punch
    Lown 1/8x 36" power roller
    Arco roto-phase model M
    Vectrax 7x12 band saw
    Miller spectrum 875
    30a spoolgun w/wc-24
    Syncrowave 250
    RCCS-14

  6. #6
    Join Date
    Sep 2008
    Location
    southwestern ohio
    Posts
    272

    Default

    That's what I figured, so that eliminates option 2, but if 180 amp on a 7018 ac rod is more than enough power I will probably just do it at home with the Airco.
    This is an automotive discussion forum that has some great infromation

    www.autobodytoolmart.com/shoptalk

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