View attachment 264960033_7317555891603756_8879025126910181724_n.jpg View attachment 364987139_274972915173158_499758394326309314_n (1).jpg View attachment 365445679_1000795284571043_1513888446384612904_n (1).jpg
Same photos here with a little bit more detail.

 

Nice. How do you cut the film away from the weld area?

 

Hey! I've modified a Bessey utility knife (Pretty sure you could use any utility knife) to take 1mm copper blades that i had our laser cut out for me.
Since copper is much soft than stainless is, it cuts the film clean off without damaging the stainless. Most of the products that we ourselves make here already have the film cut out by our laser as you see on my second photo, the ones that don't, i just use the knife on.
View attachment Copper knife.png

 

I think I've seen hard plastic blades made for those knives for the same reason... I like the copper though... ingenious...

 

Never thought of using copper. I'll have to make a few... McMaster sells the plastic ones you're talking about.

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I've used nitrogen for purging copper tube while brazing, never would have thought it would provide such good coverage (no color) for stainless :cool2:

 

Absolutely, important thing to note for using nitrogen as a purging gas for tig welding is that you can not have any cracks, the fit up must be perfect as nitrogen will otherwise contaminate the weld pool and completely destroy your tungsten. Another cool gas we use is a hydrogen-argon mix on certain occasions, it keeps the weld pool very fluid and cool, check it out!

 

Nice looking work, my compliments

 

Well done!

 

We used to use copper mig welding tips and hammer them down to a knife edge on one end. Very nice looking welds with excellent heat control.