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WELDING HELP PLEASE

Started by _nial8r_ , May 20 2011 04:12 PM

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29 replies to this topic

#1 _nial8r_

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Posted 20 May 2011 - 04:12 PM

hey all, im now up to repairing my radiator support ( LX ) and i seen in another thread yonks ago something when you fill holes on flat metal you place a piece of copper behind the hole to make it easyer to weld & clean up?? i want to fill in all the spot welds that i drilled to unpick the support off another LX. any info/help would be great :sleep:

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#2 _nzstato_

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Posted 20 May 2011 - 04:33 PM

Yep it works, a block of alloy does the same trick. Have fun with that

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#3 _LS1 Hatch_

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Posted 20 May 2011 - 04:44 PM

As said, copper works great..

I've got one of these actually:

Posted Image

Came in real handy a bunch of times having the magnet on it, incase it's for a spot hard to reach while welding at the same time. (the magnet it uses is super strong as well)

They also have all sorts of other hand held copper backers for welding against.

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#4 _Kush_

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Posted 20 May 2011 - 04:48 PM

Yep, start your weld on the copper then wash the weld pool to the outer edges of the hole. In a circular motion........ Very quickly.

The copper will absorb most of the heat

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#5 76lxhatch

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Posted 20 May 2011 - 04:53 PM

Yep it works, a block of alloy does the same trick. Have fun with that

Sort of, you have to replace the alloy often as it pits easily

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#6 _nial8r_

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Posted 20 May 2011 - 05:44 PM

didnt know alloy worked as i thought it would just melt ?? i have a slab of 12mm plate alloy here but i need it for new mounts for my HiLux bullbar. :rolleyes:

now i just need to source a lump off copper hmmmmm ...

were about's did you get that little jigger from Jeff if you dont mind me asking ?? :dontknow:

thanks for the technique Kush :spoton:

as i have never done this before :nada:

i have always just stated on the edge without blowing though and slowly filling bit by bit then pooled it up on the reverse side, but when i clean it up theres always little air cavities that need to be filled again.
wich side would i place the copper ? or doesnt it matter ?

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#7 _Kush_

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Posted 20 May 2011 - 06:16 PM

It doesn't matter what side the copper goes on.
I don't really know where you would get it from though. I've got two pieces of copper flatbar that I found kicking around the workshop. If you know a sparky, see if he can get you an offcut of busbar or you could get a mig gas shroud and bash it flat with a hammer on the concrete

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#8 _nial8r_

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Posted 20 May 2011 - 06:59 PM

cool im now on the hunt for a slab of copper :ph34r:

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#9 _Liam_

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Posted 20 May 2011 - 07:05 PM

Just track down anyone working for Integral and ask them for a LV Lightning Arrestor Busbar.

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#10 _nzstato_

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Posted 20 May 2011 - 08:49 PM

Yep it works, a block of alloy does the same trick. Have fun with that
Sort of, you have to replace the alloy often as it pits easily

Hmm not for me yet, only a bit of slag buildup on the surface. But I havent tried to weld too hot with it yet.

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#11 S pack

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Posted 20 May 2011 - 11:26 PM

cool im now on the hunt for a slab of copper

Your local Plumber should have some scrap copper pipe you could flatten.

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#12 rodomo

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Posted 20 May 2011 - 11:36 PM

cool im now on the hunt for a slab of copper

Here ya go mate! Welding's thirsty work! :spoton:

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#13 _LS1 Hatch_

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Posted 21 May 2011 - 01:03 AM

were about's did you get that little jigger from Jeff if you dont mind me asking ??

I got it from Eastwood.com I've used abit of thier stuff...their extreme chassis black paint is the best stuff I have come across actually! I imagine other online places as well would sell it...but always had top luck with everything from Eastwood before (they have heaps of other welding and panel shop type stuff.)

I did weld something or other on a big block of aluminum as well (I had it laying around) and I reckon the copper gives a much smoother finish on the back side where it was filling in than the aluminum..at least in my case, lol But I like the little magnetic do-dad as it really makes it easy and lets you not worry about having to hold onto a piece of copper/etc at the same time as welding.

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#14 _nzstato_

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Posted 21 May 2011 - 06:23 AM

I'd like some copper, but do u think the scrappies can keep their mits off it? no

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#15 76lxhatch

That was easy!

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Posted 21 May 2011 - 07:50 AM

Ask a sparky for some old bits of copper bar, works a treat as it has a nice flat edge and you can bend it to the right angle to give you something to hang on to

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#16 _nial8r_

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Posted 21 May 2011 - 08:00 AM

i dont know why i didnt think of it but i have a heap of piece's of left over 1/4' & 3/4' copper pipe sitting in the shed from when i ren the hot and cold water down to the shed :spoton:

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#17 _Yella SLuR_

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Posted 21 May 2011 - 10:04 AM

I have a big round brass off cut, but you run out of hands. That magnetic gizmo looks the goods.

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#18 _LS1 Hatch_

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Posted 21 May 2011 - 10:29 AM

I've got a chunk of brass too (about 1.5" round and 6" ? or so long...enough you can hold it while welding and heat does not get too you toooooo quickly,lol) but the magnetic do-dad really does do the trick for just about every place I can think of having used it so far.

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#19 _nial8r_

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Posted 21 May 2011 - 01:27 PM

yeah i like that little thingo too, after my chores this morning, mowing etc :nopity:

i dug out a piece of 3/4 copper pipe and heated it and made it nice and flat then folded one end over on it self to make it a bit thicker and then bent it at a 90 degree angle and then it should hold in place with one of my C clamps, its just going to be a long pain in the rectum :wedgie:

of a job but someones gotta do it :rolleyes:

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#20 _nial8r_

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Posted 21 May 2011 - 07:25 PM

well i gave my little copper backing thingo a whirl this arvo and it works a treat and its not as slow as i 1st thought it would be, here some pic's

Posted Image

had 2 goes but i anted more :lol:

so i drilled some more holes in a off cut and filled 3 more

Posted Image

clamped on with the 1st 2 vice grips i could find

Posted Image

and wal'a so much easyer and cleaner too

Posted Image

i did get the wife to video it in action but im now on the search for the cord so that i can get it on to the computer.

Thanks heaps for all your help and info it is going to make this job much quicker & easyer too.

Thanks again fellas :spoton:

i will post some pic's once i have finished the job tomorrow.

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#21 _Liam_

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Posted 21 May 2011 - 08:07 PM

Nice work mate. We all learn something new here every day, don't we?

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#22 dattoman

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Posted 21 May 2011 - 08:15 PM

You can use the removable sections of these types of copper hammer
Just buy the replacement screw on hammer heads
Posted Image

http://www.ebay.com.au/itm/Thor-Copper-Hammer-No-1-NEW-Size-1-/280667199233?pt=AU_Hand_Tools&hash=item4159119701

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#23 _Liam_

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Posted 21 May 2011 - 09:00 PM

You can use the removable sections of these types of copper hammer
Just buy the replacement screw on hammer heads

http://www.ebay.com.au/itm/Thor-Copper-Hammer-No-1-NEW-Size-1-/280667199233?pt=AU_Hand_Tools&hash=item4159119701

Or use the hammer as the backing plate?