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The Renault Welding Thread

Duncan Grier

Well-Known Member
So with all the great welding action and some proper knowledge on here thought it best to have rolling thread to track advice and highs / lows of fixing old french tin :cool:

Get posting good bad and ugly..............

........welding pics 😁
 
A long time ago I did a course in British standards welding, it was an add on to the actual one I was doing. Unfortunately I never actually got my certificate as I had a motorbike accident. We’d weld all sorts and cut them in half, what you’d see is a pretty weld isn’t always a strong weld and a strong weld isn’t always pretty!

The best thing is practice, practice, practice.

you learn to spot when you’re using too much or not enough power, mainly by sound strangely but the biggest thing was prep.

If welding a painted surface clean it back more than you think, if you’re burning paint you’ve not cleaned back far enough.

Gaps are also important, too much isn’t good and neither is not enough. It varies depending on the gauge metal being welded, with two different thickness you need to spread the heat accordingly also taking into account the type of weld you are doing.
 
I will contribute plenty here I think!

Here's an earlier repair on the 21. Dab-dab-dab rather than hold the trigger, as the piss thin french tin cant take the heat and it'll just blow holes if you don't dab it and let it cool a little.

R-Tech MIG 180, I think I use 1.5 power and 1 wire speed on this thin sheet metal. This is before being cleaned back/ground down.

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Agree with whats said above, prep/clean welding surfaces are really important. I also try and overlap as much as I can instead of butt joins, much easier welding.
 
I'm just a self taught eejiot, still learning, still capable of turning the odd turd out, not bothered as every day is a school day, don't fret when it doesn't turn out like top drawer artisan results.
Biggest fuck I ever did was power.....garage was on pikey extension out of house wiring that was running everything in garage, quite by accident I welded someone's Slaguna back box and did it on the drive with the welder plugged into the cooker socket......best weld I had ever done ........tacking a rotten back box back on to save a broke mate £30
My SIP is approaching 20 years old , on its second and ready for it's third torch.
I've only recently wired garage up properly with a sparky mate and put a proper consumer in etc, prior to that same sparky made me a heavy cable extension I plugged in said cooker socket thru kitchen window.....I'm not OCD about much.
So.....point is clean power is a must, no 20m B &Q extensions cos you're welding other side of garage!
And clean clean clean as above, sometimes not easy on shitty cars inners
Proper gas if you're after quality and panel stuff, if it's a 100 quid machine mart set up you use for bits of shizzle, welding summat and nothing etc , stick with pub gas.......point I'm making is don't sign Ronaldo if it's Sunday league you're playing
 
So got a couple of hours just and set to measure / cut and get new front mounting points attached. Made a school boy error on one side by not tacking both sides before welding in fully on one side which lifted the other....doh. Was able to fill in ok and have been more focused on penetration for these which went through well. It will not effect mounting so saved the pita of cutting bk out

So power 5 / wire 5.5 and felt / sounded good

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I’ve just started getting back into welding and will be doing a fair bit with TIG as I’m getting my own machine in the next 6 months. There are a shit tin of good YouTube videos to follow. The Fabricator Series, Welding Tips n Tricks etc.

TIG is great for control and with AC you can do Ally too, but thick to thin is tricky and MIG is often far better.

Here’s my Jag trailing arms doing with MIG. It was an old machine but pretty good in the day. My old Uni have a Fronius MIG now and that thing is idiot proof! Should be for AUS$7500!!
 
I will contribute plenty here I think!

Here's an earlier repair on the 21. Dab-dab-dab rather than hold the trigger, as the piss thin french tin cant take the heat and it'll just blow holes if you don't dab it and let it cool a little.

R-Tech MIG 180, I think I use 1.5 power and 1 wire speed on this thin sheet metal. This is before being cleaned back/ground down.

View attachment 146224View attachment 146225

Agree with whats said above, prep/clean welding surfaces are really important. I also try and overlap as much as I can instead of butt joins, much easier welding.
Great Job well done
 
Can you adjust setting whilst welding ? I had a 500 amp migatronic on demo a while back and the guy fiddled while I was welding . It was on 15mom plate mind you . The results of a slight change can make a big difference. All looking good though.
 
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