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Welding is getting better
dave - 31/12/11 at 09:36 PM

Started welding the ex rivet holes, not much build up to grind down.


PSpirine - 31/12/11 at 10:05 PM

For a welder newbie like me, could elaborate on how you "weld up" holes? My welding experience is limited to stick welding, and welding up holes with that was a tricky process with a lot of filling and chipping away to build up a layer!

How do you go about doing it with a MIG as those look mighty tidy!


Thanks,
Pavel

loggyboy - 31/12/11 at 10:19 PM

FIlling small holes like that with a Mig is relatively simple, just a matter of building the 'blob' on one edge and pushing (or pulling) it over the hole. If you can move the object, using gravity to help you can often be the key to less build up, and a neater less wasteful weld.

T66 - 31/12/11 at 10:23 PM

Practice - Strike up on one side of the hole, dont hang about or you will blow through it. Dependant how thick the steel is, you could get it done in one, on thick stuff. On thin sheet, would need a few short bursts to fill it up.

MikeR - 31/12/11 at 10:42 PM

A little trick is to put something under the hole that can't be welded. Copper is a good material (which is why i keep some very old 1p and 2p pieces around). Gives you a nice smooth bottom to your weld (or top dependeing on which way you do the welding).

dave - 31/12/11 at 11:32 PM

As has been said above, I did spend a bit of time setting the machine up using some scrap first. I noticed that the welds i done on vertical surfaces were rubbish but, the ones done on horizontal surfaces are pictured.

r1_pete - 1/1/12 at 02:17 PM

quote:
Originally posted by dave
As has been said above, I did spend a bit of time setting the machine up using some scrap first. I noticed that the welds i done on vertical surfaces were rubbish but, the ones done on horizontal surfaces are pictured.


That because the shielding gas 'falls' away on the vertical surface welds, try upping the flow.