Nick
Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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Gas purge widget:
I was going to make some back-gassing widgets by cutting and welding square aluminium tube. After seeing a vacuum hold-down fixture, I realised that a solid block with a very shallow cavity is a better solution:
This is a trial widget to see how well the idea works. The cavity is only 3mm deep, so a moderate argon flow rate should clear all the oxygen quickly. In case the gas doesn't leak out the sides fast enough, there is a small exhaust port at the top left.
This block has a lip so I can weld up to an edge; other shapes can be made for corners and inside edges - its only limited by the amount of scrap aluminium I can find around the workshop. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
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