Purge procedures and components

Please share your procedure and associated components that comprise your purge system.

Purging titanium is a must, purging steel is not but it sure welds a lot nicer when you do!

Mine is super basic and I would like to reduce the amount of argon I waste.

I have a purge system incorporated into my frame fixture (cobra)

I tack and weld accessible areas in the fixture, but pull it out for final welding.

My set up outside the fixture:

Paragon BB heat sink that has a port to introduce argon

Cobbled together copper argon box

And of course…tin foil!

Coming soon is a heat sink for my seat tube also with an argon port

Coming later will be some aluminum head tube pucks to also introduce argon. For now I use these big washers I got from paragon.

I seal the frame off with one exhaust hole for atmosphere to escape from. I rotate the frame so that the exhaust hole is at the highest point and turn on the argon. I let it flow for 5-10 minutes. I then rotate the frame and get argon to pool in the areas I am welding. I end up waiting around a lot as well as wasting a lot of argon.

Break time is over and I must return to work, please share any tips and tricks.

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I don’t TIG weld so I know very little about purge setups. But I tought this was a clever use of an Oury grip as seen in the @quirkcycles shop visit artice on The Radavist.

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The Oury is good when I’m doing individual tubes, such as dropout to Christy’s sub assembly or in the case of this picture 3D printed seat cluster to seat tube.

Can’t take credit for the idea though, Sam at Stayer Cycles came up with it.

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Calling @44bikes!
Kris recently shared several instagram posts outlining his setup.
And good lord, it is an extensive collection of tools.
He mentioned a blog post coming soon.

https://www.instagram.com/p/C-BczqHOqdb/?hl=en&img_index=1

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I’m excited for class to begin! That is an extensive set of purge goodies

A while back I just bit the bullet and ordered a full set of heat sinks from @sputniktool
A worth while investment imo.
T47 68/73
BSA 68/73
27.2 seat tube
31.6 seat tube
2x 44mm head tube

I recently started using some bronze (what I had lying around) shim stock instead of aluminum foil. Its a bit harder to form, but it will last forever. I like to form it and clip it on with spring clamps. And its strong/stiff enough to rest your hand on.

I tack in a purged cobra jig and weld in a repair stand with all four heatsinks installed. Which ever heat sink is at the highest point, I remove its argon feed so it can vent

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What flow rate are you using?

10CFH for steel, still experimenting with Ti but its def

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