Urq project

[diesel des]

FOX exhaust?

Yep. Looks good.

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[Zoig]

I also had somtimes problems welding alu. I got a gas-lens kit for my torch and did a little welding with it and it looked very promising! Maybe worth a try as they are cheap.

Regular gas lense is pretty useless, stubby gas lense is the way to go. Basically it enables the 26/17 type aircooled torches to use smaller 9 type cups, also the full setup becomes a lot smaller while performing better tha standard setup. One rough test i tried, regular gas nozzle killed my 1.6mm tungsten at 90A, with Gas lense 120A was not a problem for 1.6mm tungsten.

Idea i have failed to follow so far is to get a flexible cable 9F type torch, it is more than enough for automotive stuff while beeing smaller and cheaper than 17/26 parts.

[diesel des]

Regular gas lense is pretty useless, stubby gas lense is the way to go. Basically it enables the 26/17 type aircooled torches to use smaller 9 type cups, also the full setup becomes a lot smaller while performing better tha standard setup. One rough test i tried, regular gas nozzle killed my 1.6mm tungsten at 90A, with Gas lense 120A was not a problem for 1.6mm tungsten.

Idea i have failed to follow so far is to get a flexible cable 9F type torch, it is more than enough for automotive stuff while beeing smaller and cheaper than 17/26 parts.

Thanks for the information. This tig welding lark isn't at all easy. So many things need to be right.

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[diesel des]

Changed to a smaller tig torch and new filler rods. Its still not pretty but some of it doesn't look a complete mess, just bad. Anyhow it's mostly finished. Used almost a full bottle of argon in 13 hours of welding.











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[diesel des]

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[quattro-nick]

nice progress
your welding skills are like mine,a lot of grindingwork

[diesel des]

nice progress
your welding skills are like mine,a lot of grindingwork

Yea the grinder and stainless steel brush sees a lot of work. I am really struggling with this tig welding. I'm ok at mma and mug. No expert but I can stick weld 1.6mm wall stainless pipe and it's ok which I thought took some skill but this alloy tig is a different level. Its very frustrating. How can it be so hard.

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[quattro-nick]

i know your frustation,i wanted to weld my exhaust with my tig but even rvs was difficult for me

[Error404]

TIG is hard to get right, there are a lot of variables and coordination.
Looking at the pics, make sure the ally is perfectly clean & you have removed all oxide before you start.

Have a look at this site:
http://www.weldingtipsandtricks.com/

A lot of info and great tips to improve your technique. Plus the guy Jody is pretty funny

[diesel des]

TIG is hard to get right, there are a lot of variables and coordination.
Looking at the pics, make sure the ally is perfectly clean & you have removed all oxide before you start.

Have a look at this site:
http://www.weldingtipsandtricks.com/

A lot of info and great tips to improve your technique. Plus the guy Jody is pretty funny

I spend a fair while with the stainless brush cleaning before I start. But it sometimes seems like I'm starting soup when I get a bit melted. Its very hard to get a nice clean puddle. I'm not sure if it's user error (most likely) or equipment related. Also it's hard to get a handle on when it's about to burn through.

I would love to have a go on a nice a.c. tig set to see if its my kit or me.

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[AndyP]

I was just going to say the same about the welds looking dirty, I can see you've wire brushed them but they still need to be cleaner. I use these aswell at stainless wire wool and acetone

http://www.ebay.co.uk/itm/5PC-FLAP-W...sAAOxyRNJScNZW

also, watch this

http://www.ebay.co.uk/itm/5PC-FLAP-W...sAAOxyRNJScNZW

And if you think your struggling on power, pre-heat the weld first with a blow torch, it'll help a bit

[AndyP]

What filler rods are you using? And does your machine have an AC balance setting?

[Error404]

If you have a "skin" on the weld puddle, that is the oxide layer. It has a higher melting point so the clean metal melts below it. Try using a scotch cloth or some fine sandpaper to prep

[diesel des]

Thanks guys maybe my clean isn't clean enough. I'm used to arc rods burning through paint and rust lol.

This is the tig a.c. unit in using.



It uses my old oil filled 350 amp murex arc welder as a power source. Unfortunately the murex only does about 140 or 150 amps at a guess on single phase. I must measure that to be sure. Anyhow as you can see the boc unit has no adjustability just a foot peddle for starting the hf arc.

I have a nice thermal arc dc tig job for other stuff. Maybe I need to invest in some cleaning kit and also a good a.c. tig.

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[diesel des]

I was just going to say the same about the welds looking dirty, I can see you've wire brushed them but they still need to be cleaner. I use these aswell at stainless wire wool and acetone

http://www.ebay.co.uk/itm/5PC-FLAP-W...sAAOxyRNJScNZW

also, watch this

http://www.ebay.co.uk/itm/5PC-FLAP-W...sAAOxyRNJScNZW

And if you think your struggling on power, pre-heat the weld first with a blow torch, it'll help a bit

Thinks it's 4030 alloy rods. No a.c. balance just as the grid provides it.

What filler rods are you using? And does your machine have an AC balance setting?

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