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Welding Bodywork

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MK1_Oz
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2010/09/02 18:10:42 (permalink)
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Welding Bodywork

I am new to welding and today was the first bodywork welding that I have tried to do....I suck!!!!

I practiced on some scrap and it appeared that I was getting sorta OK penetration so I progressed to the real thing. All I did was blow blooming holes and have hot welder wire spit in my lap .

Can somebody suggest some solutions for me please? I am welding fresh metal on the rear panel at the point where it joins to the bracket that is on the boot floor. My new metal is 1.0mm. The welder is a 150amp affair and I have just put in a new spool of 0.6mm wire. The settings are shown here (pretty much I have tried several settings but even as low as it goes is blowing holes);



Following is a gallery of my inability. It's my first car restoration and as I said my first welding but I have read every thread on here and thought I might have half a chance.......

The gap around the new metal varies between 0.5mm to 1.5mm.





The next 2 from inside the boot didn't come out all that well so you cannot see the penetration I got on the tiny blob of weld that didn't blow.



Some thoughts I had as to reasons;

- I suck
- Insufficient earth. It splattered alot and stop-started. The bolt in the picture is there to hold the plate in place but also to provide an earth
- I had sprayed some weld through primer onto all surfaces before welding but I just could not get a decent earth (this was before I added the bolt). I cleaned it all off with a flat wheel. Maybe there was sufficient residue left to cause the spitting. I had already cleaned off all the etch primer that was applied after sand blasting.
- The gap between the panels is too large?
- I suck
- The wire feed was a little irregular. I think it was not coping with the weight of the new wire spool.

The weld thru primer that Adelaide Crash Suppliers sold me is;


Any help or ideas you can offer are greatly appreciated. There is only so much rear panel so I have to limit my hole blowing!!!!!!
#1


17 Replies Related Threads

    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 18:11:14 (permalink)
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    were are my sodding pictures???????
    #2
    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 18:15:54 (permalink)
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    uploaded/mk1_oz/201029181158_Plate1.jpg

    uploaded/mk1_oz/201029181247_Plate2.jpg

    uploaded/mk1_oz/20102918139_Plate3.jpg

    uploaded/mk1_oz/201029181352_Plate4_inside_boot.jpg

    uploaded/mk1_oz/201029181421_Plate5_inside_boot.jpg

    uploaded/mk1_oz/201029181450_Welder_Settings.jpg

    uploaded/mk1_oz/201029181524_Weld_Thru_Primer.JPG

    see if that works.....
    #3

    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 18:16:36 (permalink)
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    ok...how do i do this again??????
    #4
    fordsy
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    RE: Welding Bodywork 2010/09/02 18:42:10 (permalink)
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    quote:
    Originally posted by MK1_Oz














    see if that works.....

    #5
    fordsy
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    RE: Welding Bodywork 2010/09/02 18:56:46 (permalink)
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    From my welding, i've found that it spits when you haven't got the metal as clean as it should be. Blowing holes happens when either you leave the gun in one spot for too long or you have found a very thin piece of metal. The idea is to creat a small pool of liquid metal and drag it along the gap. The more constant you can keep the size of the pool, the better the weld.

    I can't really help with the setting on your welder although it does look about right for what you're aiming for.

    The settings on my welder look like this

    #6

    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 19:01:38 (permalink)
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    thanks fordsy. maybe the 40 degree weather today played a part?

    any Adelaide blokes bored and wanna give a lesson hehe

    how did you get the pics to show???
    #7
    digginganddirt
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    RE: Welding Bodywork 2010/09/02 19:26:54 (permalink)
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    mate with my knowlege your wire speed is way to high and same with your amps 1.5mm gap is to large to, by the looks you have been spot welding witch is what you want, try do a fillet and you will most likly blow it out, what lenght is your stick out? (how much wire to you have out of the gun) theres ALOT of things that come into i sugest in rolling in a cert 2 engineering course its only about 350 bucks for the year and you learn alot of basic welding skills

    cheers luke
    #8
    fordsy
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    RE: Welding Bodywork 2010/09/02 21:31:50 (permalink)
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    Have a search on Youtube for welding vids.

    There's quite a few on there and should help.

    http://www.youtube.com/watch?v=vWoMat8nfbs&feature=fvw

    http://www.youtube.com/watch?v=BsDxqb2p5OM

    http://howtoasap.com/mig%20_weld%20_automotive_sheet_medal.html
    #9
    fordsy
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    RE: Welding Bodywork 2010/09/02 21:34:10 (permalink)
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    And this one.

    http://www.youtube.com/watch?v=I9kiEdvuReM&feature=channel
    #10
    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 21:38:08 (permalink)
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    the wire length varies from around 5mm from the tip to about 10mm. The wire speed is turned up a little as the lower it was set the more unwilling the welder was to move the wire. Too high and I found the tip being pushed away from the work.

    Thought about a course but I need the car finished quickly (although I am not willing to substitute speed for quality).
    #11
    fordsy
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    RE: Welding Bodywork 2010/09/02 21:41:22 (permalink)
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    http://www.weldingtipsandtricks.com/mig-welding-videos.html
    #12
    nigel mk1
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    RE: Welding Bodywork 2010/09/02 22:03:04 (permalink)
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    Are you using .8mm wire? If so try some .6mm.
    I found .8 was fine if welding to new steel, for original sheetmetal i found .6 was easier to control.
    #13
    MK1_Oz
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    RE: Welding Bodywork 2010/09/02 22:30:21 (permalink)
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    0.6mm
    #14
    Paul Dunstan
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    RE: Welding Bodywork 2010/09/02 22:47:28 (permalink)
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    You have mail.....
    #15
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